KR20220040368A - Pipe joint and method for manufacturing thereof - Google Patents

Abstract

The present invention provides a pipe joint which has high mechanical strength resistant to repeated pressure reduction and pressure increase even if the wall thickness is reduced for miniaturization or weight reduction by sufficiently increasing the joint area between metal parts made of different materials in the pipe joint in a wall thickness range; and a method for manufacturing the pipe joint. More desirably, the construction of piping by solder joining or welding becomes easier. The pipe joint comprises a tubular first metal part made of a first metal and a tubular second metal part made of a second metal different from the first metal, and the axis of the tubular first metal part and the axis of the tubular second metal part are concentric. Between a first end portion on one side of the concentric axial direction and a second end portion on the other side of the concentric axial direction, a surface of the first metal portion in the concentric axial direction and a surface of the second metal portion in the concentric axial direction are subjected to metal diffusion bonding in the concentric axial direction.

Description

Pipe joint and manufacturing method thereof

The present invention relates to a pipe joint suitable for piping by combining metal pipes of different materials, such as copper pipe, stainless steel pipe, low carbon steel pipe, nickel pipe, aluminum pipe, titanium pipe, and the like, and a method for manufacturing the same.

DESCRIPTION OF RELATED ART Conventionally, the apparatus for piping by combining metal pipes of different materials, such as a copper pipe, a stainless steel pipe, a low carbon steel pipe, a nickel pipe, an aluminum pipe, a titanium pipe, is known conventionally. For example, Patent Document 1 discloses an air conditioner having a heat exchanger. In this air conditioner, a refrigerant pipe assembly including a configuration in which pipes made of metals of the same material and different materials are combined and piped is used. As for the material of the metal tube, aluminum, an aluminum alloy, copper, a copper alloy, iron, an iron alloy, and stainless steel are illustrated, for example. As for the joining method for piping by combining metal pipes, a piping example in which pipes are directly buttted to each other and joined by fusion (brazing bonding) of brazing materials without using a pipe joint is exemplified.

In the form of joining by brazing, for example, a form in which the inner circumferential surface of one tube and the outer circumferential surface of the other tube are joined (peripheral surface joining), the end faces (vertical faces) formed perpendicular to the thickness of the tube are placed against each other. In the form of joining (vertical surface joining), in the form in which the end faces (sloped surfaces) formed at an angle with respect to the thickness of the tube are joined together (sloped surface joining), an inclined surface is formed on one tube within the thickness range, and the inclined surface is applied to the other tube. A form of butt-joining to the outer peripheral surface of (a modified example of inclined surface joining), and a form of butt-joining flange surfaces formed at the end of a pipe (flange surface joining) are exemplified.

For the purpose of joining metal pipes of different materials, for example, Patent Document 2 discloses a dissimilar metal pipe joint made of two different single materials. As described above, the pipe using a dissimilar metal pipe joint can increase the joint strength of the pipe joint while achieving compactness of the pipe joint compared to the pipe in which the pipes are directly joined together as described above. The material constituting the pipe joint of Patent Document 2 is, for example, stainless steel, titanium, aluminum or the like. It is thought that such a dissimilar metal pipe joint can obtain a good joint state with respect to each single material and a pipe (joint pipe) of the same material by brazing or welding.

In addition, for the pipe joint of Patent Document 2, for the purpose of improving the overall joint strength of the pipe joint and optimizing the thickness of the pipe joint, inclined surface joining in which the joint area is larger than that of vertical surface joining in the joint of dissimilar metals is adopted. . In general, when increasing the bonding strength between objects, it is considered to increase the bonding area. Therefore, the pipe joint of Patent Document 2 is not vertical surface joint, but inclined surface joint is selected. Moreover, for the purpose of attaining small diameter (space saving) of a pipe joint, it is comprised so that metal parts of different materials may be inclined surface-joined within the range of the thickness of a pipe joint. The pipe joint of Patent Document 2 is produced by a method of cutting the shape of the pipe joint from a cup-shaped deep-drawn molded body having a sufficiently large thickness. The cutting (cutting) of the shape of the pipe joint is configured so that the metal part at one end and the metal part at the other end in the axial direction of the pipe joint are made of different materials, and metal parts of different materials within the range of the thickness of the pipe joint It is performed so that the inclined surface of the junction is made.

Japanese Patent Laid-Open No. 2015-114082 Patent Publication No. 2-134485 Publication

Like the pipe joint in Patent Document 2, a pipe joint configured to be inclined surface joining between metal parts of different materials within the range of its thickness is reduced in thickness due to miniaturization and weight reduction. There were cases where it could withstand repetition and break without breaking.

An object of the present invention is to have a high mechanical strength to withstand repeated pressure reduction and pressure increase by sufficiently increasing the bonding area between metal parts of different materials inside the pipe joint within the thickness range, and more preferably brazing or welding ( To provide a pipe joint that facilitates the construction of a pipe by TIG welding, laser welding, electron beam welding, etc.) and a method for manufacturing the same.

MEANS TO SOLVE THE PROBLEM The present inventors discovered that the said subject could be solved by carrying out metal diffusion bonding of the metal parts of different materials in the inside of a pipe joint along the shaft center of a pipe joint, and devised the structure of this invention.

A pipe joint according to the present invention includes a tubular first metal part constituted by a first metal and a tubular second metal part constituted by a second metal different from the first metal, wherein the first metal part The tubular axis and the tubular axis of the second metal part are concentric, and between a first end on one side and a second end on the other side in the concentric axial direction, the first A surface along the concentric axial direction of the metal part and a surface along the concentric axial direction of the second metal part are metal diffusion bonded along the concentric axial direction.

The pipe joint according to the present invention further comprises at least one of a tubular first coated metal part made of a corrosion-resistant metal and a tubular second coated metal part made of a corrosion-resistant metal, wherein the first coated metal part is provided. In this case, an axis constituting the tubular shape of the first covering metal part and an axis constituting the tubular shape of the first metal part are concentric, and between the first end portion and the second end portion, the first covering metal A surface along the concentric axial direction of the part and a surface along the concentric axial direction of the first metal part are metal diffusion bonded along the concentric axial direction, and when the second coated metal part is provided, the second 2 The tubular axis of the coated metal part and the tubular axis of the second metal part are concentric, and between the first end and the second end, the concentric It may be a pipe joint in which a surface along the axial direction and a surface along the concentric axial direction of the second metal part are metal diffusion bonded along the concentric axial direction.

The pipe joint according to the present invention further includes a tubular intermediate metal part composed of a third metal different from the first metal and the second metal, the shaft forming the tubular shape of the first metal part, and the second metal 2 An axis constituting the tubular shape of the metal part and an axis constituting the tubular shape of the intermediate metal part are concentric, and between the first end and the second end, the concentric axial direction of the first metal part is a surface along the concentric axial direction of the intermediate metal part are metal diffusion bonded along the concentric axial direction, a surface along the concentric axial direction of the second metal part, and the concentric surface of the intermediate metal part The surface along the axial direction may be a pipe joint in which metal diffusion bonding is performed along the concentric axial direction.

In the pipe joint according to the present invention, in the first end, the outer peripheral surface of the first metal part is exposed along the concentric axial direction, or in the second end, the inner peripheral surface of the second metal part is in the concentric axial direction or the outer peripheral surface of the first metal part is exposed along the concentric axial direction at the first end, and the inner peripheral surface of the second metal part at the second end is the concentric axis A pipe joint exposed along the direction may be used.

In the pipe joint according to the present invention, in the first end, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction, or in the second end, the inner peripheral surface of the intermediate metal part is in the concentric axial direction exposed, or at the first end, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction, and at the second end, the inner peripheral surface of the intermediate metal part is exposed along the concentric axial direction It may be a pipe joint that has been made.

In the pipe joint according to the present invention, the length projected on the concentric axis of the first metal part is L _M1 , the length projected on the concentric axis of the first joint part is L _J1 , and the first When the minimum inner diameter of the metal part is D _M1 , the first junction part where the first metal part and the second metal part are metal diffusion bonded satisfies L _J1 /D _M1 ≥ 0.5, or the first junction part It is preferable that a pipe joint that satisfies L _J1 /D _M1 ≥0.5 and also satisfies L _J1 /D _M1 ≥2.

In the pipe joint according to the present invention, the length projected on the concentric axis of the first metal part is L _M1 , the length projected on the concentric axis of the second joint part is L _J2 , and the second Let the length projected on the concentric axis of the metal part be L _M2 , the length projected on the concentric axis of the third junction part be L _J3 , and the minimum inner diameter of the first metal part be D _M1 . , a second junction where the first metal part and the intermediate metal part are metal diffusion bonded satisfies L _J2 /D _M1 ≥0.5 and L _J3 /D _M2 ≥0.5, or the second junction part L _J2 /D _M1 ≥0.5 and also L _J2 /D _M1 ≥2, wherein the third junction satisfies L _J3 /D _M2 ≥0.5 and L _J3 /D _M1 ≥2 It is desirable to have a pipe joint that satisfies the

Said pipe joint can be manufactured by the following manufacturing method.

In the method for manufacturing a pipe joint according to the present invention, a first metal plate made of a first metal and a second metal plate made of a second metal different from the first metal are prepared, and the first metal plate and the second metal plate are plate Rolling in a laminated state in the thickness direction, heat-treating to cause metal diffusion between the first metal and the second metal, a flat first metal layer made of the first metal, and the second metal A step of manufacturing a clad plate material in which a second flat metal layer is metal diffusion bonded along the flat plate surface direction, deep drawing forming the clad plate material, and a tubular first metal part composed of the first metal; , a tubular second metal portion constituted of the second metal, wherein an axis constituting the tubular shape of the first metal portion and an axis constituting the tubular shape of the second metal portion are concentric, and the concentric axial direction between the first end of the one side and the second end of the other side, a surface along the concentric axial direction of the first metal part and a surface along the concentric axial direction of the second metal part are the concentric A step of manufacturing a tubular member including a tubular portion that is metal diffusion joined along the axial direction, and both ends of the tubular member in the deep drawing forming direction are cut, and the tubular portion is cut from the tubular member have a process to

In the method for manufacturing a pipe joint according to the present invention, in the process of manufacturing the clad plate material, a first coated metal plate made of a corrosion-resistant metal is further prepared, rolled, and heat-treated, and a flat first coated metal layer composed of the corrosion-resistant metal and In the process of manufacturing a clad plate in which the flat first metal layer is metal diffusion bonded in the direction of the flat plate, the clad plate is deep-drawn in the process of manufacturing the tubular member, and the pipe made of the corrosion-resistant metal A first covered metal portion having a shape is provided, wherein an axis forming the tubular shape of the first metal portion and an axis forming the tubular shape of the first covering metal portion are concentric, and a space between the first end portion and the second end portion is concentric. A tubular shape comprising a tubular portion in which a surface along the concentric axial direction of the first metal part and a surface along the concentric axial direction of the first covering metal part are metal diffusion bonded along the concentric axial direction. In the step of manufacturing the member or manufacturing the clad plate material, a second coating metal plate made of a corrosion-resistant metal is further prepared, rolled, and heat-treated, and the second coating metal layer in the flat shape formed of the corrosion-resistant metal and the flat plate In the process of manufacturing a clad plate in which a second metal layer is metal diffusion bonded along the direction of the plate-shaped plate, the clad plate is deep-drawn and formed of the corrosion-resistant metal in the process of manufacturing the tubular member. 2 clad metal parts are provided, wherein an axis forming the tubular shape of the second metal part and an axis constituting the tubular shape of the second cladding metal part are concentric between the first end portion and the second end portion, wherein the A tubular member including a tubular portion in which a surface along the concentric axial direction of the second metal part and a surface along the concentric axial direction of the second covering metal part are metal diffusion bonded along the concentric axial direction is produced. A manufacturing method may be used.

In the method for manufacturing a pipe joint according to the present invention, in the process of manufacturing the clad plate material, an intermediate metal plate made of a third metal different from the first metal and the second metal is further prepared, rolled, heat treated, and flat A clad plate material in which a flat intermediate metal layer composed of the third metal is metal diffusion bonded along the flat plate surface direction between the first metal layer and the flat second metal layer is produced, and the tubular member is produced In the process, the clad plate is deep-drawn and provided with a tubular intermediate metal part made of the third metal, the shaft forming the tubular shape of the first metal part and the shaft forming the tubular shape of the second metal part and an axis constituting the tubular shape of the intermediate metal portion is concentric, and between the first end and the second end, a surface along the concentric axial direction of the first metal portion and the concentricity of the intermediate metal portion A surface along the axial direction is metal diffusion bonded along the concentric axial direction, and a surface of the second metal part along the concentric axial direction and a surface along the concentric axial direction of the intermediate metal part are in the concentric axial direction. It may be a manufacturing method for producing a tubular member including a tubular portion subjected to metal diffusion bonding along the ?

The method for manufacturing a pipe joint according to the present invention has a step of exposing the outer peripheral surface of the first metal part along the concentric axial direction at the first end of the tubular part cut off from the tubular member, or a step of exposing an inner peripheral surface of the second metal part along the concentric axial direction at the second end of the tubular part cut off from the tubular member, or the tubular part cut off from the tubular member In the first end, the outer peripheral surface of the first metal part is exposed along the concentric axial direction, and at the second end of the tubular part cut off from the tubular member, the inner peripheral surface of the second metal part is concentrically It may be a manufacturing method having a step of exposing along the axial direction of

The manufacturing method of the pipe joint according to the present invention has a step of exposing the outer peripheral surface of the intermediate metal part along the concentric axial direction at the first end of the tubular part cut off from the tubular member, or a step of exposing an inner peripheral surface of the intermediate metal part along the concentric axial direction at the second end of the tubular part cut off from the tubular member, or the first end of the tubular part cut off from the tubular member In the above, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction, and at the second end of the tubular part cut off from the tubular member, the inner peripheral surface of the intermediate metal part is exposed along the concentric axial direction. The manufacturing method which has a process of exposing may be sufficient.

In the method for manufacturing a pipe joint according to the present invention, the length projected on the concentric axis of the first metal part is L _M1 , and the length projected on the concentric axis of the first junction part is L _J1 , When the minimum inner diameter of the first metal part is D _M1 , the tubular part is formed so that the first junction where the first metal part and the second metal part are metal diffusion bonded satisfies L _J1 /L _M1 ≥ 0.5. or forming the tubular portion such that the first junction satisfies L _J1 /D _M1 ≥ 0.5 and also satisfies L _J1 /D _M1 ≥2.

In the method for manufacturing a pipe joint according to the present invention, the length projected on the concentric axis of the first metal part is L _M1 , and the length projected on the concentric axis of the second joint part is L _J2 , Let the length projected on the concentric axis of the second metal part be L _M2 , the length projected on the concentric axis of the third junction part be L _J3 , and the minimum inner diameter of the first metal part be D _M1 When , the second junction of the first metal part and the intermediate metal part by metal diffusion bonding satisfies L _J2 /L _M1 ≥ 0.5, and the metal diffusion bonding of the second metal part and the intermediate metal part is performed forming the tubular portion such that a third junction with a third junction satisfies L _J3 /L _M2 ≥0.5, or wherein the second junction satisfies L _J2 /D _M1 ≥0.5 with L _J2 /D _M1 ≥2 and the third junction satisfies L _J3 /D _M2 ≧0.5, and at the same time satisfies L _J3 /D _M1 ≧2.

According to the present invention, since the bonding area between metal parts of different materials inside the pipe joint is sufficiently large within the thickness range, a pipe having high mechanical strength to withstand repeated pressure reduction and pressure increase even if the thickness is reduced for miniaturization and weight reduction. A seam is obtained. In addition, the pipe joint according to the present invention is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint, so piping by brazing or welding (TIG welding, laser welding, electron beam welding, etc.) makes construction easier.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st structural example of the pipe joint which concerns on this invention.
Fig. 2 is a view showing a first modified example of the first structural example of the pipe joint according to the present invention.
3 is a view showing a second modified example of the first structural example of the pipe joint according to the present invention.
4 is a view showing a third modified example of the first structural example of the pipe joint according to the present invention.
5 is a view showing a second configuration example of the pipe joint according to the present invention.
6 is a view showing a first modified example of the second configuration example of the pipe joint according to the present invention.
7 is a view showing a second modified example of the second configuration example of the pipe joint according to the present invention.
Fig. 8 is a view showing a third modified example of the second structural example of the pipe joint according to the present invention.
9 is a view showing a third configuration example of the pipe joint according to the present invention.
Fig. 10 is a view showing a first modified example of the third structural example of the pipe joint according to the present invention.
11 is a view showing a second modified example of the third structural example of the pipe joint according to the present invention.
12 is a view showing a third modified example of the third structural example of the pipe joint according to the present invention.
13 is a view showing a fourth configuration example of a pipe joint according to the present invention.
Fig. 14 is a view showing a first modified example of the fourth structural example of the pipe joint according to the present invention.
Fig. 15 is a view showing a second modified example of the fourth structural example of the pipe joint according to the present invention.
Fig. 16 is a view showing a third modified example of the fourth structural example of the pipe joint according to the present invention.
17 is a view showing a fifth configuration example of a pipe joint according to the present invention.
18 is a view showing a first modified example of the fifth structural example of the pipe joint according to the present invention.
19 is a view showing a second modified example of the fifth configuration example of the pipe joint according to the present invention.
20 is a view showing a third modified example of the fifth structural example of the pipe joint according to the present invention.
Fig. 21 is a view showing a fourth modified example of the fifth structural example of the pipe joint according to the present invention.
22 is a view showing a fifth modified example of the fifth structural example of the pipe joint according to the present invention.
Fig. 23 is a view showing a sixth modified example of the fifth structural example of the pipe joint according to the present invention.
24 is a view showing a sixth configuration example of a pipe joint according to the present invention.
Fig. 25 is a view showing a first modified example of the sixth structural example of the pipe joint according to the present invention.
26 is a view showing a second modified example of the sixth configuration example of the pipe joint according to the present invention.
Fig. 27 is a view showing a third modified example of the sixth structural example of the pipe joint according to the present invention.
Fig. 28 is a view showing a fourth modified example of the sixth structural example of the pipe joint according to the present invention.
Fig. 29 is a view showing a fifth modified example of the sixth structural example of the pipe joint according to the present invention.
Fig. 30 is a view showing a sixth modified example of the sixth structural example of the pipe joint according to the present invention.
Fig. 31 is a view showing a seventh configuration example of a pipe joint according to the present invention.
Fig. 32 is a view showing a first modified example of the seventh structural example of the pipe joint according to the present invention;
Fig. 33 is a view showing a second modified example of the seventh structural example of the pipe joint according to the present invention.
Fig. 34 is a view showing a third modified example of the seventh structural example of the pipe joint according to the present invention.
Fig. 35 is a view showing a fourth modified example of the seventh structural example of the pipe joint according to the present invention.
Fig. 36 is a view showing a fifth modified example of the seventh structural example of the pipe joint according to the present invention.
Fig. 37 is a view showing a sixth modified example of the seventh structural example of the pipe joint according to the present invention.
Fig. 38 is a view showing an eighth configuration example of a pipe joint according to the present invention.
Fig. 39 is a view showing a first modified example of the eighth structural example of the pipe joint according to the present invention.
Fig. 40 is a view showing a second modified example of the eighth structural example of the pipe joint according to the present invention.
Fig. 41 is a view showing a third modified example of the eighth structural example of the pipe joint according to the present invention.
Fig. 42 is a view showing a fourth modified example of the eighth structural example of the pipe joint according to the present invention.
Fig. 43 is a view showing a fifth modified example of the eighth structural example of the pipe joint according to the present invention.
44 is a view showing a sixth modified example of the eighth structural example of the pipe joint according to the present invention.
It is a figure shown in order to demonstrate the manufacturing method which concerns on the 1st structural example of a pipe joint.
It is a figure which shows in order to demonstrate the manufacturing method which concerns on the 2nd structural example of a pipe joint.
Fig. 47 is a view for explaining the manufacturing method according to the third structural example of the pipe joint.
It is a figure shown in order to demonstrate the manufacturing method which concerns on the 4th structural example of a pipe joint.
It is a figure shown in order to demonstrate the manufacturing method which concerns on the 5th structural example of a pipe joint.
Fig. 50 is a diagram illustrating a method for manufacturing a pipe joint according to a sixth configuration example;
It is a figure which shows in order to demonstrate the manufacturing method which concerns on the 7th structural example of a pipe joint.
It is a figure which shows in order to demonstrate the manufacturing method which concerns on the 8th structural example of a pipe joint.
Fig. 53 is a view for explaining the manufacturing method according to the first structural example of the pipe joint.
Fig. 54 is a view for explaining the manufacturing method according to the first structural example of the pipe joint.
Fig. 55 is a view for explaining the manufacturing method according to the first structural example of the pipe joint.
Fig. 56 is a diagram showing a piping example of a dissimilar metal pipe using the first structural example of a pipe joint.
Fig. 57 is a diagram showing a piping example of a dissimilar metal pipe using a first modified example of the first structural example of a pipe joint.
Fig. 58 is a diagram showing a piping example of a dissimilar metal pipe using a third modified example of the first structural example of a pipe joint.

About the form for implementing this invention, some structural examples used as embodiment of the pipe joint which concern on this invention, and its modification are illustrated, and it demonstrates suitably with reference to drawings.

<First configuration example>

As one embodiment of the pipe joint which concerns on this invention, a 1st structural example is shown in FIG.

The pipe joint 100 shown as a 1st structural example in FIG. 1 is the tubular 1st metal part 11 comprised by the 1st metal, and the tubular 2nd comprised by the 2nd metal different from the 1st metal. A metal part 12 is provided. In the pipe joint 100 , the axis constituting the tubular shape of the first metal part 11 and the axis constituting the tubular shape of the second metal part 12 are concentric. That is, the axes P-P of the first metal portion 11 and the second metal portion 12 forming the tubular shape are common. And between the first end of the one side (X1 side) in the concentric axial direction (X direction) to the second end of the other side (X2 side) in the concentric axial direction ( The surface along the X direction) and the surface along the concentric axial direction (X direction) of the second metal portion 12 are metal diffusion bonded along the concentric axial direction (X direction). Thereby, the metal diffusion junction part used as the junction part (1st junction part B12) of the 1st metal part 11 and the 2nd metal part 12 which make a tubular shape also comprises a tubular shape.

In the pipe joint 100, within the range of the thickness that is inside the pipe joint 100, the first junction part B12 forms a tubular shape, so that the area of the first junction part B12, that is, the area of the metal diffusion junction part has a thickness large enough within the range of Therefore, the pipe joint 100 has a joint area between the first metal part 11 and the second metal part 12 in comparison with a conventional dissimilar metal pipe joint in which an inclined surface is joined within the range of the thickness of the pipe joint. It can be made large enough within the range. Here, "to form a tubular shape" means that it has a predetermined thickness, forms a predetermined layer, and is continuously configured without interruption around a central axis (axis line) like a cylinder, for example.

Within the range of the thickness that is inside the pipe joint 100 , the first junction part B12 forming a tubular shape is a metal diffusion junction part, and thus the first metal and the second metal part constituting the first metal part 11 . A strong adhesive force is expressed by diffusion (metal diffusion) of some components of the second metal constituting (12). In general, in metal diffusion bonding, a larger bonding area is secured than welding in which the base material is melted, and greater bonding strength is secured than in brazing bonding in which the base material is not melted. Moreover, in the case of joining objects to each other, the larger the joint area, the greater the joint strength is obtained. For example, a conventional dissimilar metal pipe joint (refer to Patent Document 2) is devised to increase the joint area by making the joint surface as inclined as possible within the range of the tube thickness (thickness) in order to obtain greater joint strength. From this point of view, the pipe joint 100 having the first joint portion B12 forming a tubular shape has a sufficiently large area within the thickness range compared to the conventional dissimilar metal pipe joint that is inclined in the range of the thickness of the pipe joint. A strong adhesion by the metal diffusion bonding portion (the first bonding portion B12) of the can be obtained. Therefore, the pipe joint 100 can sufficiently increase the bonding strength between the first metal part 11 and the second metal part 12 . As a result, since the joint 100 of the pipe joint 100 has a high bonding strength between the first metal part 11 and the second metal part 12, even if the thickness is reduced for miniaturization and weight reduction, a high mechanical strength that withstands repeated pressure reduction and pressure increase can have strength.

In addition, from the viewpoint of improving the mechanical strength of the pipe joint 100 , the first junction part B12, which is a metal diffusion junction part between the first metal part 11 and the second metal part 12 , is the first metal part 11 . Let L _M1 be the length projected on the concentric axis PP of Assuming that the length, that is, the length of the line segment connecting the projected point P1 and the projected point P2, is L _J1 , it is preferable to satisfy L _J1 /L _M1 ≥ 0.5. In the pipe joint 100 configured to satisfy L _J1 /L _M1 ≥ 0.5, the area (joint area) of the first junction part B12 forming a tubular shape by metal diffusion bonding is sufficiently larger than that of a conventional dissimilar metal pipe joint. Therefore, in the pipe joint 100, the joint strength between the first metal part 11 and the second metal part 12 is large enough, and it becomes a pipe joint sufficient for practical use.

Similarly, from the viewpoint of improving the mechanical strength of the pipe joint 100 , the first joint portion B12 , which is a metal diffusion bonding portion between the first metal portion 11 and the second metal portion 12 , is the first metal portion 11 . ), when the minimum inner diameter in the radial direction (Z direction) is D _M1 , it is preferable to satisfy L _J1 /D _M1 ≥2. In the pipe joint 100 configured to satisfy L _J1 /D _M1 ≥2, the area (junction area) of the first joint portion B12, which forms a tubular shape by metal diffusion bonding, is sufficiently larger than that of a conventional dissimilar metal pipe joint, The bonding strength between the first metal portion 11 and the second metal portion 12 is sufficiently large for practical use. Here, "minimum inner diameter" means the standard inner diameter (refer to JIS-B0151:2018) in the case of a pipe joint of the same diameter, and in the case of a pipe joint with a difference in concentric diameter (different diameter), it means the standard inner diameter on the small diameter side .

In the pipe joint 100, the first metal constituting the first metal part 11 and the second metal constituting the second metal part 12 are rolled (clad) in a state in which they are laminated on each other in the plate thickness direction. rolling) is possible, and it may be any material in which appropriate metal diffusion occurs by heating (heat treatment) after clad rolling. For example, iron-based stainless steel (Austenitic such as SUS304 and SUS316 of JIS standard, ferritic such as SUS430, etc.), Fe alloy containing Ni (Fe-Ni type, Fe-Ni-Co type, etc.) ), low-carbon steel (SPCE, SPCE, SPCF, SPCG, etc. of JIS standards) can be used. In addition, for example, non-ferrous materials such as Cu (JIS standard C1020, C1100, etc.), Cu alloy (JIS standard C2100, C2600, C2680, etc.), A1 (JIS standard A1050, A1100, etc.), A1 alloy ( JIS standard A3003, A5021, A5052, A5086, etc.), Ni (JIS standard NW2200, NW2201, etc.), Ni alloy (Ni-Cu, Ni-Cr, Ni-Nb, etc.), Ti (JIS standard 2 species), Ti alloys (T-A1-V series, Ti-A1-Sn series, etc.) can be used.

The combination of the first metal part 11 and the second metal part 12 constituting the pipe joint 100 , that is, the combination of the first metal and the second metal, is a combination of one and the other joined through the pipe joint 100 . It can be selected according to the type of tube. From the viewpoint of the bondability of the pipe joint 100 and the pipe joined thereto, the first metal part 11 (first metal) is made of a material equivalent to that of one pipe joined thereto, and the second metal part 12 (Second metal) is preferably made of a material equivalent to that of the other tube joined thereto. For example, when one pipe is a pipe made of Cu or a Cu alloy (copper pipe), and the other pipe is a pipe made of stainless steel (stainless steel pipe), the first metal is Cu or Cu alloy, and the first metal is It is preferable that the part 11 is constituted, and the second metal part 12 is constituted by using the second metal as stainless steel. In addition, in the pipe joint 100 shown in FIG. 1, the inner material is Cu or a Cu alloy, and the outer material may be a combination of stainless steel, the inner material is stainless steel, and the outer material is Cu or a combination of Cu alloy it's good too

From the same viewpoint, the first metal part 11 and the second metal part 12 constituting the pipe joint 100 are a combination of a low-carbon steel pipe, an aluminum pipe, a nickel pipe, a titanium pipe, etc. with respect to a copper pipe, It can be set according to the use, such as combining a stainless steel pipe with a low carbon steel pipe, an aluminum pipe, a nickel pipe, a titanium pipe, etc. In this way, by selecting the first metal part 11 (first metal) and the second metal part 12 (second metal) of the pipe joint 100, the pipe (joint pipe) of the material suitable for welding is also , it becomes a pipe joint that can be easily joined even to a pipe (to-be-joined pipe) of a material suitable for brazing bonding while ensuring appropriate bonding strength.

Next, the manufacturing method of the pipe joint 100 shown as a 1st structural example in FIG. 1 is demonstrated.

The pipe joint 100 includes a process of manufacturing the clad plate material 1 as shown in FIG. 45, a process of manufacturing a tubular member by deep drawing forming as shown in FIGS. 53 and 54, and a process shown in FIG. It can be manufactured by the manufacturing method which has a process of cutting a tubular part from a tubular member as described above.

In the process of manufacturing the clad plate material 1, the first metal plate 11 made of a first metal (for example, Cu) and a second metal different from the first metal (for example, stainless steel or A1) are used. The formed 2nd metal plate 12 is prepared, and it rolls in the state which laminated|stacked the 1st metal plate 11 and the 2nd metal plate 12 in the plate|board thickness direction (X direction). Then, heat treatment is performed under a condition that metal diffusion occurs between the first metal and the second metal. In this way, the flat plate-shaped first metal layer 11 made of the first metal and the flat plate-shaped second metal layer 12 made of the second metal are metal diffusion bonded along the flat plate plane direction (X direction). A clad plate 1 as shown at 45 is produced.

In the process of producing a tubular member by deep drawing molding, as shown in FIGS. 53 and 54, a punch 900 and a die 910 are used, and the clad plate 1 is placed on the first metal layer 11 side (X2). side) toward the second metal layer 12 side (X1 side). In this deep drawing forming, the surface 11a of the first metal layer 11 of the clad sheet 1 to which the punch 900 is in contact is located inside the deep draw forming body, and the clad sheet 1 to which the die 910 is in contact. The surface 12b of the second metal layer 12 is located on the outside of the deep-drawn molded body. By such deep drawing forming, a tubular first metal portion 11 made of a first metal (eg, Cu) and a tubular formed of a second metal (eg, stainless steel or A1) are formed. The second metal portion 12 of PP), and from the first end of the one side (X1 side) in the concentric axial direction (X direction) to the second end of the other side (X2 side), the concentric axis of the first metal part 11 The plane along the direction (X direction shown in FIG. 1) and the plane along the concentric axial direction (axis line PP shown in FIG. 1) of the 2nd metal part 12 are concentric with the axial direction (X direction shown in FIG. 1) A tubular member having a U-shape in cross section in the X direction including a tubular portion joined by metal diffusion bonding is manufactured.

In the step of cutting the tubular portion from the tubular member, as shown in Fig. 55, both ends of the tubular member having a U-shaped cross section in the X direction in the deep drawing forming direction (X direction) are cut, for example, on the X1 side. The cut is made at the position of the line segment C1-C1, and the X2 side is cut at the position of the line segment C2-C2. Thereby, the tubular portion corresponding to the shape of the pipe joint 100 having a cylindrical appearance is cut from the tubular member having a U-shaped cross section in the X direction, and the pipe joint 100 having a cylindrical appearance can be produced. there is.

Since the joint area of the metal parts of different materials inside the pipe joint 100 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 100 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint in which the inclined surface is joined within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of First Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 1st structural example is shown in FIG.

The pipe joint 110 shown as a first modified example of the first structural example in FIG. 2 is the length of the second metal part 12 forming a tubular shape using the pipe joint 100 in the axial direction (X direction) in a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 110 has a step on the outer peripheral side of the first end. Therefore, the pipe joint 110 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 100 (the projection point P2 and the projection point P3) of the line segment connecting the length) decreases. Considering that the ratio of the length of the first joint (B12) to the pipe joint (110) is smaller than that of the pipe joint (100), for example, when adjusting the pipe diameter (for example, the reference inner diameter), such as increasing , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 100) and equivalent bonding strength can be obtained.

In addition, you may think that the pipe joint 110 is similar to the pipe joint 100 except for the structure regarding the length of the axial direction (X direction) with respect to the 2nd metal part 12 and the 1st joint part B12. Therefore, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 110 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

The pipe joint 110 has a process of manufacturing the clad plate material 1 (refer to Fig. 45), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 110, the process of manufacturing the clad plate 1, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 100. good to think Therefore, in the manufacture of the pipe joint 110 , for the process similar to that of the pipe joint 100 , reference is made to the description of the pipe joint 100 , and it is omitted here.

In the manufacturing of the pipe joint 110, in the step of exposing the outer peripheral surface 11b of the first metal part 11, a part of the second metal part 12 at the first end of the tubular part cut off from the tubular member is removed to expose the outer peripheral surface 11b of the first metal part 11 . The exposure of the outer peripheral surface 11b of the first metal part 11 is possible by means of cutting, grinding, chemical polishing, or the like. Thereby, using a tubular portion corresponding to the shape of the pipe joint 100 cut off from a tubular member having a U-shape in cross section in the X direction, the tube having a substantially cylindrical appearance and having a step on the outer periphery of the first end The seam 110 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 110 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 110 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of First Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 1st structural example is shown in FIG.

The pipe joint 120 shown as a second modified example of the first structural example in Fig. 3 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 100 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 2nd metal part 12 making up. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 is the projected point on the axis PP of the second metal part 12 . It is smaller than the length of the line segment connecting (P1) and the projected point (P3). In addition, the pipe joint 120 has a step on the inner peripheral side of the second end. Therefore, the pipe joint 120 is the length of the first junction part B12 forming the tubular shape that is metal diffusion bonded compared to the pipe joint 100 (the line segment connecting the projection point P1 and the projection point P2). length) decreases. Considering that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 100, the pipe joint 120 is adjusted, for example, by increasing the pipe diameter (for example, the reference inner diameter). Since the area along the axial direction (X direction) of the first joint portion B12 forming the tubular shape, that is, the joint area between the first metal portion 11 and the second metal portion 12, can be increased, the pipe joint 100 ) and equivalent bonding strength can be obtained.

In addition, you may think that the pipe joint 120 is similar to the pipe joint 100 except for the structure regarding the length in the axial direction (X direction) with respect to the 1st metal part 11 and the 1st junction part B12. Therefore, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 120 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

The pipe joint 120 has a process of manufacturing the clad plate material 1 (refer to Fig. 45), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 120, the process of manufacturing the clad plate material 1, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are considered to be the same as those of the pipe joint 100 also good Therefore, in the manufacture of the pipe joint 120, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100 (first configuration example), and it is omitted here.

In the manufacturing of the pipe joint 120, in the step of exposing the inner peripheral surface 12a of the second metal part 12, a part of the first metal part 11 at the second end of the tubular part cut off from the tubular member is removed to expose the inner peripheral surface 12a of the second metal part 12 . The exposure of the inner peripheral surface 12a of the second metal part 12 is possible by means of cutting, grinding, chemical polishing, or the like. Thereby, using a tubular portion corresponding to the shape of the pipe joint 100 cut off from a tubular member having a U-shape in cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. The seam 120 may be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 120 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 120 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint in which the inclined surface is joined within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third Modification of First Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 1st structural example is shown in FIG.

The pipe joint 130 shown as a third modified example of the first structural example in FIG. 4 is the length of the first metal part 11 forming a tubular shape using the pipe joint 100 in the axial direction (X direction), The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 130 has a step on the outer peripheral side of the first end and the inner peripheral side of the second end. Therefore, the pipe joint 130 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 100 (the line segment connecting the projection point P2 and the projection point P3 ). length) decreases. Considering that the ratio of the length of the first joint portion B12 to the pipe joint 130 is smaller than that of the pipe joint 100, for example, if the tube diameter (for example, the reference inner diameter) is adjusted, such as increasing Since the area along the axial direction (X direction) of the first joint portion B12 forming the tubular shape, that is, the joint area between the first metal portion 11 and the second metal portion 12, can be increased, the pipe joint 100 ) and equivalent bonding strength can be obtained.

In addition, the pipe joint 130 is a pipe joint 100 except for the configuration regarding the length in the axial direction (X direction) with respect to the first metal part 11, the second metal part 12, and the first joint part B12. You can think of it as the same. Therefore, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 130 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

The pipe joint 130 has a process of manufacturing the clad plate material 1 (see Fig. 45), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, It can manufacture by the manufacturing method which has the process of exposing the outer peripheral surface 11b of the 1st metal part 11, and exposing the inner peripheral surface 12a of the 2nd metal part 12 in a 2nd edge part. In addition, in the manufacture of the pipe joint 130, the process of manufacturing the clad plate material 1, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 100. good night. Therefore, in the manufacture of the pipe joint 130, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 130, in the process of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12, At the first end of the tubular part, a part of the second metal part 12 is removed to expose the outer peripheral surface 11b of the first metal part 11, and the second end of the tubular part cut off from the tubular member. In this, a part of the first metal part 11 is removed to expose the inner peripheral surface 12a of the second metal part 12 . The process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered similar to that of the pipe joint 110 , and the process of exposing the inner peripheral surface 12a of the second metal part 12 is the pipe joint 120 . ) can be thought of as the same. Thereby, using a tubular portion corresponding to the shape of the pipe joint 100 cut out from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical, and the step is at both the first end and the second end. A pipe joint 130 having a can be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 130 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, since the joint portion of the metal parts of different materials is less likely to be damaged in the pipe joint 130 as compared to a conventional dissimilar metal pipe joint in which an inclined surface is joined within the thickness of the pipe joint, brazing or welding (TIG welding) , laser welding, electron beam welding, etc.) facilitates pipe construction.

<Second configuration example>

As one embodiment of the pipe joint which concerns on this invention, a 2nd structural example is shown in FIG.

The pipe joint 200 shown as a 2nd structural example in FIG. 5 is the tubular shape comprised by the corrosion-resistant metal on the inner peripheral surface 11a of the 1st metal part 11 of the pipe joint 100 shown as a 1st structural example in FIG. of the first covered metal portion 13 (13 _IN ). In the pipe joint 200 , the axis forming the tubular shape of the first covering metal portions 13 ( 13 _IN ) and the axis forming the tubular shape of the first metal portion 11 are concentric. That is, the axis line PP of the 1st covering metal part 13 ( _13IN ) and the 1st metal part 11 which form a tubular shape is common. And between the 1st edge part (X1 side) to the 2nd edge part (X2 side) WHEREIN: The surface along the concentric axial direction (X direction) of the 1st covering metal part 13 ( _13IN ), and a 1st The surface of the metal part 11 along the concentric axial direction (X direction) is metal diffusion bonded along the concentric axial direction (X direction). Thereby, the metal diffusion junction part formed by the junction part (fourth junction part B13) of the 1st covering metal part 13 ( _13IN ) which forms a tubular shape and the 1st metal part 11 which forms a tubular shape is also shown, It is also tubular.

In the pipe joint 200, the area of the fourth joint portion B13, that is, the area of the metal diffusion joint portion, becomes sufficiently large as the fourth joint portion B13 forms a tubular shape within the range of the thickness that is the inside of the tube joint 200. . Therefore, in the pipe joint 200, the joining area of the 1st covering metal part 13 ( _13IN ) and the 1st metal part 11 becomes large enough within the range of the thickness of a pipe joint. When the bonding area of the fourth bonding portion B13 is sufficiently large, the bonding strength between the first covering metal portion 13 ( _13IN ) and the first metal portion 11 can be sufficiently increased. Accordingly, the pipe joint 200 further provided with the first covering metal part 13 (13 _IN ) on the inner peripheral surface 11a side of the first metal part 11 of the pipe joint 100 is also the pipe joint 100 and It further has the same high mechanical strength. In addition, similarly to the pipe joint 100, from the viewpoint of improving mechanical strength, the pipe joint 200 preferably satisfies L _J1 /L _M1 ≥ 0.5, and also preferably satisfies L _J1 /D _M1 ≥2.

In addition, since the pipe joint 200 further provides a tubular first covering metal part 13 (13 _IN ) on the inner peripheral surface 11a side of the first metal part 11 of the pipe joint 100, Compared with the pipe joint 100 in which the inner peripheral surface 11a of the tubular first metal part 11 composed of a first metal that is not limited to corrosion-resistant metal is exposed, the inner peripheral surface 11a of the pipe joint is high (inner peripheral surface 13a). It has corrosion resistance. In addition, you may think that the pipe joint 200 is similar to the pipe joint 100 except for the structure along the 1st covering metal part 13 ( _13IN ) and the 4th joining part B13. Therefore, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 200 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

In the pipe joint 200, the combination of the first coated metal part 13 (13 _IN ) and the first metal part 11, that is, the combination of the corrosion-resistant metal and the first metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding and has adequate metal diffusion by heating (heat treatment) after clad rolling. The first metal may be selected from among the ferrous and non-ferrous materials applicable to the pipe joint 100 . It is preferable to use Ni (NW2200, NW2201, etc. of JIS standard) or Ti (1 type, 2 types, etc. of JIS standard) etc. as a corrosion-resistant metal, for example. For example, when the pipe joined to the inner circumferential surface 11a of the first metal part 11 of the pipe joint 200 is a copper pipe, the first metal of the same type as the copper pipe is used in consideration of melting during brazing or welding. It is preferable to configure the first metal portion 11 as Cu or a Cu alloy. Then, the inner peripheral surface 13a of the first coated metal portion 13 ( _13IN ) by forming the first coated metal portion 13 ( _13IN ) by using a corrosion-resistant metal as Ni or a Ni alloy, for example. Tubes can be brazed or welded. In this case, the second metal portion 12 can be constituted by using, for example, stainless steel as the second metal.

From the same viewpoint, the first metal part 11, the second metal part 12 and the first covering metal part 13 ( _13IN ) constituting the pipe joint 200 are low-carbon steel pipe, It can be set according to the application, such as combining an aluminum tube, a nickel tube, a titanium tube, etc., combining a low carbon steel tube, an aluminum tube, a nickel tube, a titanium tube, etc. with respect to a stainless steel tube. In this way, the first metal constituting the first metal part 11 of the pipe joint 200, the second metal constituting the second metal part 12, and the first covering metal part 13 (13 _IN ) A pipe joint that can be easily joined while ensuring proper bonding strength to both a pipe (joint pipe) that is a material suitable for welding and a pipe (joint pipe) that is a material suitable for brazing by appropriately selecting the corrosion-resistant metal constituting it. becomes

The first covered metal portions 13 ( 13 _IN ) constituting the pipe joint 200 preferably have a suitably large thickness in order to obtain appropriate corrosion resistance. From this viewpoint, it is preferable that the 1st covering metal part 13 ( _13IN ) is formed by clad rolling which can form a covering metal layer of a larger thickness easily. In addition, according to the usage environment of the pipe joint 200, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chrome plating layer, or an anodite layer, which is generally smaller in thickness by clad rolling, is coated on the first coated metal part 13 ) (13 _IN ). In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film by plating after forming in the shape of the pipe joint 100 .

The pipe joint 200 can be manufactured by a manufacturing method having a process of manufacturing the clad plate material 2 (see FIG. 46 ), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. In addition, in the manufacture of the pipe joint 200, the process of manufacturing a tubular member and the process of cutting a tubular part from a tubular member may be considered similar to the pipe joint 100. Therefore, in the manufacture of the pipe joint 200, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and it is omitted here.

In the manufacture of the pipe joint 200, in the process of manufacturing the clad plate material 2, the first metal plate 11 made of a first metal (eg, Cu) and a second metal different from the first metal ( For example, a second metal plate 12 made of stainless steel or A1 and a first coated metal plate 13 made of a corrosion-resistant metal (for example, Ni) are prepared, and the first coated metal plate 13 and It is rolled in the state which laminated|stacked the 1st metal plate 11 and the 2nd metal plate 12 in the plate|board thickness direction (X direction). Then, the heat treatment is performed under conditions in which metal diffusion occurs between the corrosion-resistant metal and the first metal and between the first metal and the second metal. Thereby, the flat plate-shaped first covering metal layer 13 constituted of the corrosion-resistant metal, the flat first metal layer 11 constituted of the first metal, and the flat plate-shaped second metal layer 12 constituted of the second metal. A clad plate material 2 as shown in Fig. 46 that is metal diffusion bonded along the plate-like plate surface direction (X direction) is produced. Using this clad plate 2, similarly to the pipe joint 100, a pipe joint 200 having a cylindrical appearance by a process of manufacturing a tubular member by deep drawing molding and a process of cutting the tubular part from the tubular member ) can be produced.

In addition, the pipe joint 200 can also be produced by forming a film on the inner circumferential surface 11a of the first metal part 11 of the pipe joint 100 manufactured using the clad plate material 1 by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

In the pipe joint 200 manufactured by the above manufacturing method, the joint area between the metal parts of different materials inside the pipe joint 200 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range. A pipe joint with high mechanical strength to withstand is obtained. And, the pipe joint 200 is difficult to break the joint portion between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of Second Configuration Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 2nd structural example is shown in FIG.

The pipe joint 210 shown as a first modified example of the second configuration example in FIG. 6 is the length of the second metal part 12 forming a tubular shape using the pipe joint 200 in the axial direction (X direction) in a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 210 has a step on the outer peripheral side of the first end. Therefore, the pipe joint 210 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 200 (the line segment connecting the projection point P2 and the projection point P3). length) decreases. The pipe joint 210 considers that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 200, for example, when adjusting the pipe diameter (for example, the reference inner diameter), such as increasing the , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 200) and equivalent bonding strength can be obtained.

In addition, you may consider the pipe joint 210 to be the same as the pipe joint 200 except for the structure regarding the length of the axial direction (X direction) with respect to the 2nd metal part 12 and the 1st joint part B12. Therefore, in the pipe joint 210 , the description of the pipe joint 200 is referred to, and the description of the pipe joint 200 is referred to for the configuration other than the combination of the first metal and the second metal, and the effect thereof is omitted. do.

The pipe joint 210 has a process of manufacturing the clad plate material 2 (see Fig. 46), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 210, the process of manufacturing the clad plate material 2, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are considered to be the same as those of the pipe joint 200 Alternatively, the process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered to be the same as that of the pipe joint 110 . Therefore, in the manufacture of the pipe joint 210, for the same process as the pipe joint 200 and the pipe joint 110, refer to the description of the pipe joint 200 and the pipe joint 110, and will be omitted here. . Thereby, using a tubular portion corresponding to the shape of the pipe joint 200 cut off from a tubular member having a U-shape in cross section in the X direction, the tube having a substantially cylindrical appearance and having a step on the outer periphery of the first end A seam 210 may be manufactured.

In the pipe joint 210 manufactured by the above manufacturing method, since the joint area between the metal parts of different materials inside the pipe joint 210 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand is obtained. In addition, the pipe joint 210 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of Second Configuration Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 2nd structural example is shown in FIG.

The pipe joint 220 shown as a second modified example of the second configuration example in FIG. 7 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 200 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 2nd metal part 12 making up. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 is projected on the axis PP of the second metal part 12 . It is smaller than the length of the line segment connecting the projected point P1 and the projected point P3. In addition, the pipe joint 220 has a step on the inner peripheral side of the second end. Therefore, the pipe joint 220 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 200 (the line segment connecting the projection point P1 and the projection point P2). length) decreases. Considering that the ratio of the length of the first joint portion B12 to the pipe joint 220 is smaller than that of the pipe joint 200, for example, if the tube diameter (for example, the reference inner diameter) is adjusted, such as increasing , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 200) and equivalent bonding strength can be obtained.

In addition, the pipe joint 220 has an axial direction (X direction) with respect to the first metal part 11 , the first junction part B12 , the first covering metal part 13 ( 13 _IN ), and the fourth junction part B13 . Except for the configuration related to the length of the pipe joint 200 may be considered the same. Therefore, for the configuration and effects thereof other than the combination of the corrosion-resistant metal and the first metal and the second metal in the pipe joint 220, refer to the description of the pipe joint 200, and omitted here do.

The pipe joint 220 has a process of manufacturing the clad plate material 2 (see Fig. 46), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, and has a concentric axial direction (X direction) of the other side (X2 side), in the 2nd end part, it can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the 2nd metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 220, the process of manufacturing the clad plate material 2, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 200. You may think, and the process of exposing the inner peripheral surface 12a of the second metal part 12 is similar to that of the pipe joint 120 except that a part of the first covering metal part 13 (13IN) is removed. also good Therefore, in the manufacture of the pipe joint 220, for the process similar to the pipe joint 200 and the pipe joint 120, refer to the description of the pipe joint 200 and the pipe joint 120, and omitted here do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 200 cut off from a tubular member having a U-shaped cross section in the X direction, a pipe joint having a cylindrical appearance and a step on the inner peripheral side of the second end (220) can be crafted.

Since the joint area of the metal parts of different materials inside the pipe joint 220 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 220 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third modification of the second configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 2nd structural example is shown in FIG.

The pipe joint 230 shown as a third modified example of the second configuration example in FIG. 8 is the length of the first metal part 11 forming a tubular shape using the pipe joint 200 in the axial direction (X direction), The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 230 has a step on the outer peripheral side of the first end and the inner peripheral side of the second end. Accordingly, the pipe joint 230 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 200 (the length of the line segment connecting the projection point P2 and the projection point P3 ). length) decreases. Considering that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 200, the pipe joint 230 is adjusted, for example, by increasing the pipe diameter (for example, the reference inner diameter). , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 200) and equivalent bonding strength can be obtained.

In addition, the pipe joint 230 includes a first metal part 11 , a second metal part 12 , a first junction part B12 , a first covering metal part 13 ( 13 _IN ), and a fourth junction part B13 ). You may think of it as the same as that of the pipe joint 200 except for the structure regarding the length of the axial direction (X direction) regarding to. Therefore, in the pipe joint 230 , the description of the pipe joint 200 is referred to, and the description of the pipe joint 200 is referred to for the configuration other than the combination of the first metal and the second metal, and the effect thereof is omitted. do.

The pipe joint 230 has a process of manufacturing the clad plate material 2 (refer to Fig. 46), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. It can be produced by a manufacturing method having a step of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12 at the second end. . In addition, in the manufacture of the pipe joint 230, the process of manufacturing the clad plate material 2, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 200. You may think, and you may think that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 in a 1st end part may be considered similar to the pipe joint 210, and the inner peripheral surface 12a of the 2nd metal part 12. The process of exposing may be considered to be the same as that of the pipe joint 220 . Therefore, in the manufacture of the pipe joint 230, the pipe joint 200, the pipe joint 210 and the pipe joint 200 with respect to the same process as the pipe joint 200, the pipe joint 210, and the pipe joint 220. Reference is made to the description of (220), which is omitted here. Thereby, using a tubular portion corresponding to the shape of the pipe joint 200 cut off from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end A pipe joint 230 having a step difference on the inner peripheral side may be manufactured.

Since the joint area between metal parts of different materials inside the pipe joint 230 of the pipe joint 230 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 230 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is joined on an inclined plane within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd structural example is shown in FIG.

The pipe joint 300 shown as a 3rd structural example in FIG. 9 is the tubular shape comprised by the corrosion-resistant metal on the outer peripheral surface 12b of the 2nd metal part 12 of the pipe joint 100 shown as a 1st structural example in FIG. of the second coated metal portion 13 (13 _OUT ) is further provided. In the pipe joint 300 , the axis forming the tubular shape of the second covering metal portions 13 ( 13 _OUT ) and the axis forming the tubular shape of the second metal portion 12 are concentric. That is, the axis line PP of the 2nd covering metal part 13 (13 _OUT ) and the 2nd metal part 12 which form a tubular shape is common. And between the 1st end part of the one side (X1 side) of the concentric axial direction (X direction) to the 2nd end part of the other side (X2 side) _WHEREIN : A surface along the concentric axial direction (X direction) and a surface along the concentric axial direction (X direction) of the second metal portion 12 are metal diffusion bonded along the concentric axial direction (X direction). Thereby, the metal diffusion junction portion serving as the junction portion (the fifth junction portion B23) of the tubular second covering metal portion 13 ( 13 _OUT ) and the tubular second metal portion 12 is also tubular shape.

The pipe joint 300 is within the range of the thickness that is inside the pipe joint 300, and the fifth junction part B23 forms a tubular shape, so that the area of the fifth junction part B23, that is, the area of the metal diffusion junction part is big enough Therefore, in the pipe joint 300, the joint area of the 2nd covering metal part 13 ( _13OUT ) and the 2nd metal part 12 becomes large enough within the range of the thickness of a pipe joint. When the bonding area of the fifth bonding portion B23 is sufficiently large, the bonding strength between the second covering metal portion 13 ( 13 _OUT ) and the second metal portion 12 can be sufficiently increased. Therefore, the pipe joint 300 further provided with a second covering metal part 13 (13 _OUT ) on the outer peripheral surface 12b side of the second metal part 12 of the pipe joint 100 is also the pipe joint 100 It will further have a high mechanical strength equivalent to . In addition, like the pipe joint 100, from the viewpoint of improving the mechanical strength, the pipe joint 300 preferably satisfies L _J1 /L _M1 ≥ 0.5, and also preferably satisfies L _J1 /D _M1 ≥ 2 .

In addition, since the pipe joint 300 is further provided with a tubular second covering metal part 13 (13 _OUT ) on the outer peripheral surface 12b side of the second metal part 12 of the pipe joint 100, Compared to the pipe joint 100 in which the outer peripheral surface 12b of the tubular second metal part 12 composed of a second metal that is not limited to corrosion-resistant metal is exposed, it is higher on the outside (outer peripheral surface 13b) of the pipe joint. It has corrosion resistance. In addition, you may think that the pipe joint 300 is similar to the pipe joint 100 except for the structure along the 2nd covering metal part 13 (13 _OUT ) and the 5th joining part B23. Accordingly, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 300 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

In the pipe joint 300, the combination of the second coated metal part 13 (13 _OUT ) and the second metal part 12, that is, the combination of the corrosion-resistant metal and the second metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding and has adequate metal diffusion by heating (heat treatment) after clad rolling. The second metal may be selected from the above-described ferrous and non-ferrous materials applicable to the pipe joint 100 . It is preferable to use, for example, Ni (NW2200, NW2201, etc. of JIS standard) or Ti (1 type, 2 types, etc. of JIS standard) etc. as a corrosion-resistant metal. For example, when the pipe joined to the outer circumferential surface 12b of the second metal part 12 of the pipe joint 300 is a copper pipe, in consideration of melting during brazing or welding, the second metal is of the same type as the copper pipe. It is preferable to configure the second metal part 12 as Cu or a Cu alloy. Then, by forming the second coated metal portion 13 ( 13 _OUT ) by using a corrosion-resistant metal as Ni or a Ni alloy, for example, on the outer peripheral surface 13b of the second coated metal portion 13 ( 13 _OUT ) Copper tubes can be brazed or welded to each other. In this case, the first metal portion 11 can be formed by using, for example, stainless steel as the first metal.

From the same viewpoint, the first metal part 11, the second metal part 12, and the second coated metal part 13 (13 _OUT ) constituting the pipe joint 300 are low-carbon steel pipe, It can be set according to the use, such as combining an aluminum tube, a nickel tube, a titanium tube, etc., combining a low-carbon steel tube, an aluminum tube, a nickel tube, a titanium tube, etc. with respect to a stainless steel tube. In this way, the first metal constituting the first metal part 11 of the pipe joint 300, the second metal constituting the second metal part 12, and the second covering metal part 13 (13 _OUT ) A pipe joint that can be easily joined while ensuring proper joint strength to both a pipe made of a material suitable for welding (joint pipe) and a pipe made of a material suitable for brazing (joint pipe) by appropriately selecting the corrosion-resistant metal constituting it. becomes

The second covering metal portion 13 ( 13 _OUT ) constituting the pipe joint 300 preferably has an appropriately large thickness in order to obtain appropriate corrosion resistance. From this viewpoint, it is preferable that the 2nd covering metal part 13 (13 _OUT ) is formed by clad rolling which can form a covering metal layer of a larger thickness easily. In addition, depending on the usage environment of the pipe joint 300, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chrome plating layer, or an anodize layer, which is generally smaller than that obtained by clad rolling, is coated with a second coating metal part. (13) (13 _OUT ) can also be used. In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film by performing plating treatment 0 and the like after forming in the shape of the pipe joint 100 .

The pipe joint 300 can be manufactured by a manufacturing method having a process of manufacturing the clad plate material 3 (refer to FIG. 47), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member. In addition, in the manufacture of the pipe joint 300 , the process of manufacturing the tubular member and the process of cutting the tubular portion from the tubular member may be considered to be the same as those of the pipe joint 100 . Therefore, in the manufacture of the pipe joint 300, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 300, in the process of manufacturing the clad plate 3, the first metal plate 11 made of a first metal (eg, stainless steel or A1), and a product different from the first metal A second metal plate 12 made of a bimetal (for example, Cu) and a second coated metal plate 13 made of a corrosion-resistant metal (for example, Ni) are further prepared, and the first metal plate 11 and the It is rolled in the state which laminated|stacked the 2nd metal plate 12 and the 2nd covering metal plate 13 in the plate|board thickness direction (X direction). Then, heat treatment is performed under conditions such that metal diffusion occurs between the first metal and the second metal and between the second metal and the corrosion-resistant metal. Thereby, the flat plate-shaped first metal layer 11 constituted of the first metal, the plate-shaped second metal layer 12 constituted of the second metal, and the flat plate-shaped second covering metal layer 13 constituted of the corrosion-resistant metal. A clad plate 3 as shown in Fig. 47 that is metal diffusion bonded along the plate-like plate surface direction (X-direction) is produced. Using this clad plate 3, as with the pipe joint 100, a pipe joint having a cylindrical appearance by a process of manufacturing a tubular member by deep drawing molding and a process of cutting the tubular part from the tubular member ( 300) can be produced.

In addition, the pipe joint 300 can also be produced by forming a film on the outer peripheral surface 12b of the second metal part 12 of the pipe joint 100 manufactured using the clad plate material 1 by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

Since the joint area between metal parts of different materials inside the pipe joint 300 of the pipe joint 300 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 300 is difficult to break the joint between the metal parts of different materials as compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of Third Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 3rd structural example is shown in FIG.

The pipe joint 310 shown as a first modified example of the third structural example in Fig. 10 is the length of the second metal part 12 forming a tubular shape using the pipe joint 300 in the axial direction (X direction) in a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 310 has a step on the outer peripheral side of the first end. Accordingly, the pipe joint 310 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 300 (the line segment connecting the projection point P2 and the projection point P3 ). length) decreases. In the pipe joint 310, considering that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 300, for example, if adjustment is made such as to increase the pipe diameter (for example, the reference inner diameter) , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 300) and equivalent bonding strength can be obtained.

In addition, the pipe joint 310 has an axial direction (X direction) with respect to the second metal part 12 , the first junction part B12 , the second covering metal part 13 ( 13 _OUT ), and the fifth junction part B23 . Except for the configuration related to the length of the pipe joint 300 may be considered the same. Therefore, in the pipe joint 310, the description of the pipe joint 300 is referred to, and the description of the pipe joint 300 is referred to for the configuration other than the combination of the first metal, the second metal, and the corrosion-resistant metal, and the effect thereof. do.

The pipe joint 310 has a process of manufacturing the clad plate material 3 (see Fig. 47), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, and has a concentric axial direction (X direction) of one side (X1 side), in the 1st edge part, it can manufacture by the manufacturing method which has the process of exposing the outer peripheral surface 11b of the 1st metal part 11. In addition, in the manufacture of the pipe joint 310, the process of manufacturing the clad plate material 3, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 300. You can think of it, and the process of exposing the outer peripheral surface 11b of the first metal part 11 is the same as the pipe joint 110 except that part of the second covering metal part 13 ( 13 _OUT ) is removed. good to think Therefore, in the manufacture of the pipe joint 310, for the process similar to the pipe joint 300 and the pipe joint 110, refer to the description of the pipe joint 300 and the pipe joint 110, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 300 cut off from a tubular member having a U-shaped cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end A pipe joint 310 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 310 of the pipe joint 310 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 310 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of Third Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 3rd structural example is shown in FIG.

The pipe joint 320 shown as a second modified example of the third configuration example in FIG. 11 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 300 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the second metal part 12 forming the The length of the line segment connecting the second metal portion 12 is smaller than the length of the line segment connecting the projected point P1 and the projected point P3 projected on the axis PP of the second metal part 12 . In addition, the pipe joint 320 has a step on the inner peripheral side of the second end. Therefore, the pipe joint 320 is the length of the first junction part B12 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 300 (the projection point P1 and the projection point P2) of the line segment connecting the length) decreases. In the pipe joint 310, considering that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 300, for example, if adjustment is made such as to increase the pipe diameter (for example, the reference inner diameter) , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 300) and equivalent bonding strength can be obtained.

In addition, the pipe joint 320 may be considered similar to the pipe joint 300 except for the configuration regarding the length in the axial direction (X direction) with respect to the first metal part 11 and the first joint part B12. Therefore, in the pipe joint 320, for the configuration other than the combination of the first metal, the second metal, and the corrosion-resistant metal, the description of the pipe joint 300 is referred to, and the description of the pipe joint 300 is omitted here. do.

The pipe joint 320 has a process of manufacturing the clad plate 3 (see FIG. 47), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, and has a concentric axial direction (X direction) of the other side (X2 side), in the 2nd end part, it can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the 2nd metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 320, the process of manufacturing the clad plate 3, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 300. Alternatively, the process of exposing the inner peripheral surface 12a of the second metal portion 12 may be considered to be the same as that of the pipe joint 120 . Therefore, in the manufacture of the pipe joint 320, for the same process as the pipe joint 300 and the pipe joint 120, refer to the description of the pipe joint 300 and the pipe joint 120, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 300 cut off from the tubular member having a U-shaped cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. A seam 320 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 320 of the pipe joint 320 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 320 is difficult to break in the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third Modification of Third Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 3rd structural example is shown in FIG.

The pipe joint 330 shown as a third modified example of the third structural example in FIG. 12 is the length of the first metal part 11 forming a tubular shape using the pipe joint 300 in the axial direction (X direction), The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 330 has a step on the outer peripheral side of the first end and the inner peripheral side of the second end. Accordingly, the pipe joint 330 is the length of the first junction part B12 (projection point P2 and projection point P3) forming a tubular shape that is metal diffusion bonded compared to the pipe joint 300 (the line segment connecting the projection point P2 and the projection point P3 length) decreases. The pipe joint 330 considers that the ratio of the length of the first joint portion B12 is smaller than that of the pipe joint 300, and for example, if adjustment such as increasing the pipe diameter (for example, the reference inner diameter) , since the area along the axial direction (X direction) of the first junction part B12 forming the tubular shape, that is, the junction area between the first metal part 11 and the second metal part 12, can be increased, the pipe joint ( 300) and equivalent bonding strength can be obtained.

In addition, the pipe joint 330 includes a first metal part 11 , a second metal part 12 , a first junction part B12 , a second cover metal part 13 ( 13 _OUT ), and a fifth junction part B23 . You may consider it similar to the pipe joint 300 except for the structure regarding the length of the axial direction (X direction) regarding to. Therefore, the description of the pipe joint 300 is referred to, and the description of the pipe joint 300 is referred to, and the description of the pipe joint 330 other than the combination of the first metal and the second metal is referred to, and the description thereof is omitted.

The pipe joint 330 has a process of manufacturing the clad plate material 3 (refer to FIG. 47), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, and has a concentric axial direction (X direction) of the other side (X2 side) of the axial direction (X direction) concentric while having the process of exposing the outer peripheral surface 11b of the 1st metal part 11 in the 1st edge part of one side (X1 side) ) can be produced by a manufacturing method comprising the step of exposing the inner peripheral surface 12a of the second metal portion 12 at the second end portion. In addition, in the manufacture of the pipe joint 330, the process of manufacturing the clad plate 3, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 300. You may think of it, and you may think that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 in a 1st end part is similar to the pipe joint 310, and the inner peripheral surface 12a of the 2nd metal part 12. The process of exposing may be considered similar to that of the pipe joint 320 . Therefore, in the manufacture of the pipe joint 330, the pipe joint 300, the pipe joint 310 and the pipe joint with respect to the same process as the pipe joint 300, the pipe joint 310, and the pipe joint 320. Reference is made to the description of ( 320 ), which will be omitted here. Thereby, using the tubular portion corresponding to the shape of the pipe joint 300 cut out from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end It is possible to manufacture a pipe joint 330 having a step on the inner peripheral side of the.

Since the joint area of the metal parts of different materials inside the pipe joint 330 of the pipe joint 330 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 330 is difficult to break in the joint between the metal parts of different materials as compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fourth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 4th structural example is shown in FIG.

The pipe joint 400 shown as a 4th structural example in FIG. 13 is the tubular shape comprised by the corrosion-resistant metal on the inner peripheral surface 11a of the 1st metal part 11 of the pipe joint 100 shown as a 1st structural example in FIG. A _tubular second covering metal portion 13 ( 13 _OUT ) is to be further provided. In addition, in the pipe joint 400, the structure along the 1st covered metal part 13 ( _13IN ) and the 1st metal part 11 may be considered to be the same as that of the pipe joint 200, and the 2nd covered metal part (13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 300 . Accordingly, the pipe joint 400 may have a high mechanical strength to withstand repeated pressure reduction and pressure increase, like the pipe joint 200 or the pipe joint 300 , that is, like the pipe joint 100 . Further, similarly to the pipe joint 100 , from the viewpoint of improving mechanical strength, the pipe joint 400 preferably satisfies L _J1 /L _M1 ≥ 0.5, and also preferably satisfies L _J1 /D _M1 ≥2.

In addition, the pipe joint 400 further installs a tubular first covering metal part 13 (13IN) on the inner circumferential surface 11a of the first metal part 11 of the pipe joint 100, and the second Since the tubular second covering metal part 13 (13 _OUT ) is further provided on the outer peripheral surface 12b of the metal part 12, the tubular first formed of a first metal that is not limited to a corrosion-resistant metal. A pipe joint 100 in which the inner circumferential surface 11a of the metal part 11 is exposed and the outer circumferential surface 12b of the tubular second metal part 12 made of a second metal that is not limited to a corrosion-resistant metal is exposed. It has high corrosion resistance on the inner side (inner peripheral surface 13a) and the outer side (outer peripheral surface 13b) of the pipe joint as compared with . In addition, the pipe joint 400 is configured according to the first covered metal part 13 ( 13 _IN ), the fourth junction part B13 , the second coated metal part 13 ( 13 _OUT ), and the fifth joint part B23 . Other than that, you may think of it as the same as the pipe joint 100 . Therefore, the description of the pipe joint 100 is referred to, and the description of the pipe joint 100 is referred to, and the description of the pipe joint 400 is referred to, except for the combination of the first metal and the second metal.

In the pipe joint 400 , the combination of the first coated metal part 13 ( 13 _IN ) and the first metal part 11 , that is, the combination of the corrosion-resistant metal and the first metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding, and suitable for metal diffusion by heating (heat treatment) after clad rolling. The combination of the second covering metal portion 13 ( 13 _OUT ) and the second metal portion 12 , that is, the combination of the corrosion-resistant metal and the second metal is also the same. In addition, the first metal constituting the first metal part 11, the second metal constituting the second metal part 12, the corrosion-resistant metal constituting the first covering metal part 13 ( _13IN ), and the second The selection of the corrosion-resistant metal constituting the coated metal part 13 (13 _OUT ) may be performed in the same manner as the pipe joint 200 and the pipe joint 300, see the description of the pipe joint 200 and the pipe joint 300 and a description thereof will be omitted.

The first coated metal portion 13 ( 13 _IN ) and the second coated metal portion 13 ( 13 _OUT ) constituting the pipe joint 400 preferably have an appropriately large thickness in order to obtain appropriate corrosion resistance. From this point of view, the first covering metal portion 13 ( 13 _IN ) and the second covering metal portion 13 ( 13 _OUT ) are formed by clad rolling which can easily form a covering metal layer of a larger thickness. it is preferable In addition, depending on the usage environment of the pipe joint 400, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chrome plating layer, or an anodite layer, which is generally smaller than that obtained by clad rolling, is coated with a coating layer ( 13) (13 _IN ) and the second covering metal portion 13 ( 13 _OUT ) can also be used. In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film by plating after forming in the shape of the pipe joint 100 .

The pipe joint 400 can be manufactured by a manufacturing method having a process of manufacturing the clad plate 4 (refer to FIG. 48), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. In addition, in the manufacture of the pipe joint 400 , the process of manufacturing the tubular member and the process of cutting the tubular portion from the tubular member may be considered to be the same as those of the pipe joint 100 . Therefore, in the manufacture of the pipe joint 400, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 400, in the process of manufacturing the clad plate 4, the first metal plate 11 made of a first metal (eg, Cu) and a second metal different from the first metal (eg, Cu) For example, the second metal plate 12 made of stainless steel or A1, the first coated metal plate 13 ( _13IN ) and the second coated metal plate 13 (13) made of a corrosion-resistant metal (for example, Ni) _OUT ) is further prepared, and the first coated metal plate 13 ( 13 _IN ), the first metal plate 11 , the second metal plate 12 and the second coated metal plate 13 ( 13 _OUT ) are drawn in the plate thickness direction (X direction) and rolled in a laminated state. Then, between the corrosion-resistant metal and the first metal, between the first metal and the second metal, and between the second metal and the corrosion-resistant metal, heat treatment is performed under conditions such that metal diffusion occurs. Thereby, the flat plate-shaped 1st covering metal layer 13 ( _13IN ) comprised with the corrosion-resistant metal, the flat plate-shaped 1st metal layer 11 comprised with the 1st metal, and the flat plate shape comprised with the 2nd metal 2nd A clad plate material 4 as shown in Fig. 48 in which the metal layer 12 and the flat second covering metal layer 13 (13 _OUT ) made of a corrosion-resistant metal are metal diffusion bonded along the flat plate plane direction (X direction) ) is produced. Using this clad plate 4, similarly to the pipe joint 100, a tube having a cylindrical appearance by the process of producing a tubular member by deep drawing molding and the process of cutting the tubular part from the tubular member The seam 400 may be manufactured.

In addition, the pipe joint 400 is the inner peripheral surface 11a of the first metal part 11 of the pipe joint 100 manufactured using the clad plate material 1 and the outer peripheral surface 12b of the second metal part 12. It can also be produced by forming a film by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

Since the joint area of the metal parts of different materials inside the pipe joint 400 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. It is possible to obtain a pipe joint with high mechanical strength to withstand And, the pipe joint 400 is difficult to break the joint between the metal parts of different materials compared to a conventional dissimilar metal pipe joint that is inclined on an inclined plane within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<The first modification of the fourth structural example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 4th structural example is shown in FIG.

The pipe joint 410 shown as a first modified example of the fourth structural example in FIG. 14 is the length of the second metal part 12 forming a tubular shape using the pipe joint 400 in the axial direction (X direction) in a tubular shape. It is made smaller than the length of the axial direction (X direction) of the 1st metal part 11 which makes up. In addition, in the pipe joint 410, the structure according to the first metal part 13 ( _13IN ) and the first metal part 11 may be considered to be the same as that of the pipe joint 210, and the second metal part 13 IN is covered. (13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 310 . Accordingly, the pipe joint 410, like the pipe joint 210 or the pipe joint 310, may have high mechanical strength to withstand repeated pressure reduction and pressure increase. In addition, like the pipe joint 210 or the pipe joint 310 , from the viewpoint of improving the mechanical strength, the pipe joint 410 preferably satisfies L _J1 /L _M1 ≥ 0.5, and also L _J1 /D _M1 ≥ 2 It is desirable to satisfy

In addition, the pipe joint 410 has an axial direction (X direction) with respect to the second metal part 12 , the first junction part B12 , the second covering metal part 13 ( 13 _OUT ), and the fifth junction part B23 . Except for the configuration related to the length of the pipe joint 400 may be considered the same. Therefore, in the pipe joint 410, except for the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the configuration and the effect thereof, etc. reference, and omitted here.

The pipe joint 410 has a process of manufacturing the clad plate material 4 (refer to Fig. 48), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 410, the process of manufacturing the clad plate material 4, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 400. You may think about it, and you may consider that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 is the same as that of the pipe joint 310 . Therefore, in the manufacture of the pipe joint 410, for the process similar to the pipe joint 400 and the pipe joint 310, refer to the description of the pipe joint 400 and the pipe joint 310, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 400 cut off from a tubular member having a U-shape in cross section in the X direction, the tube having a substantially cylindrical appearance and having a step on the outer periphery of the first end A seam 410 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 410 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 410 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second modification of the fourth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 4th structural example is shown in FIG.

The pipe joint 420 shown as a second modified example of the fourth structural example in Fig. 15 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 400 to form a tubular shape. It is made smaller than the length of the axial direction (X direction) of the 2nd metal part 12 which makes up. In addition, in the pipe joint 420, the configuration according to the first metal part 13 (13 _IN ) and the first metal part 11 may be considered to be the same as that of the pipe joint 220, and the second coating metal part ( 13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 320 . Accordingly, the pipe joint 420, like the pipe joint 220 or the pipe joint 320, may have high mechanical strength to withstand repeated pressure reduction and pressure increase. In addition, similarly to the pipe joint 220 or the pipe joint 320 , from the viewpoint of improving the mechanical strength, the pipe joint 420 preferably satisfies L _J1 /L _M1 ≥ 0.5, and also L _J1 /D _M1 ≥ 2 It is desirable to satisfy

In addition, the pipe joint 420 has an axial direction (X direction) with respect to the first metal part 11 , the first joint part B12 , the first cover metal part 13 ( 13 _IN ), and the fourth joint part B13 . Except for the configuration related to the length of the pipe joint 400 may be considered the same. Therefore, in the pipe joint 420, except for the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the configuration and the effect thereof, etc. reference, and omitted here.

The pipe joint 420 has a process of manufacturing the clad plate material 4 (see Fig. 48), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member, and the second end 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 420, the process of manufacturing the clad plate material 4, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 400. Alternatively, the process of exposing the inner peripheral surface 12a of the second metal portion 12 may be considered to be the same as that of the pipe joint 320 . Therefore, in the manufacture of the pipe joint 420, for the same process as the pipe joint 400 and the pipe joint 320, refer to the description of the pipe joint 400 and the pipe joint 320, and omitted here. do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 400 cut off from the tubular member having a U-shape in cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. A seam 420 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 420 produced by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, since the pipe joint 420 is less likely to break the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third modification of the fourth structural example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 4th structural example is shown in FIG.

The pipe joint 430 shown as a third modified example of the fourth structural example in FIG. 16 is the length of the first metal part 11 forming a tubular shape using the pipe joint 400 in the axial direction (X direction), The length in the axial direction (X direction) of the second metal portion 12 forming the shape is made substantially equal. In addition, in the pipe joint 430, the configuration of the first covered metal part 13 (13 _IN ) and the first metal part 11 may be considered to be the same as that of the pipe joint 230, and the second coated metal part ( 13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 330 . Accordingly, the pipe joint 430, like the pipe joint 230 or the pipe joint 330, may have high mechanical strength to withstand repeated pressure reduction and pressure increase. In addition, the pipe joint 430, like the pipe joint 230 or the pipe joint 330, preferably satisfy L _J1 /L _M1 ≥ 0.5 from the viewpoint of improving mechanical strength, and also L _J1 /D _M1 ≥ 2 It is desirable to satisfy

In addition, the pipe joint 430 includes a first metal part 11 , a second metal part 12 , a first junction part B12 , a first covering metal part 13 ( 13 _IN ), and a fourth junction part B13 ). , you may think of it as the same as the pipe joint 400 except for the structure regarding the length of the axial direction (X direction) with respect to the 2nd covering metal part 13 ( _13OUT ) and the 5th junction part B23. Therefore, in the pipe joint 430, except for the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the description of the pipe joint 400 is given for the configuration and its effects and the like. reference, and omitted here.

The pipe joint 430 has a process of manufacturing the clad plate material 4 (refer to FIG. 48), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member. It can be produced by a manufacturing method having a step of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12 at the second end. . In addition, in the manufacture of the pipe joint 430, the process of manufacturing the clad plate material 4, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 400. You may think, and you may think that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 in the 1st end part may be considered similar to the pipe joint 410, and the inner peripheral surface 12a of the 2nd metal part 12. The process of exposing may be considered to be the same as that of the pipe joint 420 . Accordingly, in the manufacture of the pipe joint 430, the pipe joint 400, the pipe joint 410, and the pipe joint 420 with respect to the same process as the pipe joint 400, the pipe joint 410 and the pipe joint. Reference is made to the description of 420 , which will be omitted here. Thereby, using the tubular portion corresponding to the shape of the pipe joint 400 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end It is possible to manufacture a pipe joint 430 having a step difference on the inner peripheral side of the.

Since the joint area between the metal parts of different materials inside the pipe joint 430 of the pipe joint 430 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 430 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fifth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 5th structural example is shown in FIG.

The pipe joint 500 shown as a 5th structural example in FIG. 17 is an intermediate metal part between the 1st metal part 11 and the 2nd metal part 12 of the pipe joint 100 shown as a 1st structural example in FIG. (14) is installed. The pipe joint 500 includes a tubular first metal part 11 made of a first metal, a tubular second metal part 12 made of a second metal different from the first metal, and a first and a tubular intermediate metal portion 14 made of a metal and a third metal different from the second metal. In the pipe joint 500 , the shaft constituting the tubular shape of the first metal part 11 , the shaft constituting the tubular shape of the second metal part 12 , and the axis constituting the tubular shape of the intermediate metal part 14 are is concentric That is, the axes P-P of the first metal part 11 , the second metal part 12 , and the intermediate metal part 14 forming the tubular shape are common. And between the first end of the one side (X1 side) in the concentric axial direction (X direction) to the second end of the other side (X2 side) in the concentric axial direction ( The surface along the X direction) and the surface along the concentric axial direction (X direction) of the intermediate metal portion 14 are metal diffusion bonded along the concentric axial direction (X direction), so that the intermediate metal portion 14 is concentric A surface along the axial direction (X direction) of the second metal portion 12 and a surface along the concentric axial direction (X direction) of the second metal portion 12 are metal diffusion bonded along the concentric axial direction (X direction). With this configuration, the metal diffusion junction portion serving as the junction portion (the second junction portion B14) of the tubular first metal portion 11 and the tubular intermediate metal portion 14 also has a tubular shape, The metal diffusion junction portion serving as the junction portion (third junction portion B24) of the tubular second metal portion 12 and the tubular intermediate metal portion 14 also has a tubular shape.

The pipe joint 500 is within the range of the thickness that is the inside of the pipe joint 500, and the second joint part B14 and the third joint part B24 both form a tubular shape, so that the second joint part B14 and the third joint part B14 and the third joint part B14 are formed. The area of the bonding portion B24, that is, the area of the metal diffusion bonding portion, becomes sufficiently large within the thickness range. Therefore, the pipe joint 500 has a joint area between the first metal part 11 and the intermediate metal part 14 and the intermediate metal part compared with a conventional dissimilar metal pipe joint in which an inclined surface is joined within the thickness range of the pipe joint. The joint area between (14) and the second metal portion 12 becomes sufficiently large within the thickness range. When the bonding area of the second bonding portion B14 and the third bonding portion B24 is sufficiently large, the bonding strength between the first metal portion 11 and the intermediate metal portion 14 and the second metal portion 12 and the intermediate metal portion are sufficiently large. The joint strength of (14) can be sufficiently increased. In addition, since the tubular second junction portion B14 and the third junction portion B24 are both metal diffusion junction portions, the first metal and intermediate metal portions 14 constituting the first metal portion 11 are constituted. A strong adhesive force is expressed by diffusion (metal diffusion) of a part of the third metal to be used and the second metal constituting the second metal portion 12 . Thereby, the pipe joint 500 has a high mechanical strength that withstands repeated pressure reduction and pressure increase even if the thickness is reduced for miniaturization and weight reduction compared to a conventional dissimilar metal pipe joint that is sloped within the range of the thickness of the pipe joint. can have

In addition, from the viewpoint of improving the mechanical strength of the pipe joint 500 , the length projected on the concentric axis PP of the first metal part 11 , that is, the line segment connecting the projected point P1 and the projected point P2 Let the length be L _M1 , and the length projected on the concentric axis PP of the second junction B14, that is, the length of the line segment connecting the projected point P1 and the projected point P2, is L _J2 . The second junction part B14, in which the first metal part 11 and the intermediate metal part 14 are metal diffusion bonded, preferably satisfies L _J2 /L _M1 ≥ 0.5, and the concentricity of the second metal part 12 is The length projected on the axis PP, that is, the length of the line segment connecting the projection point P1 and the projection point P2 is called L _M2 , and the length projected on the concentric axis PP of the third junction B24, that is, When the length of the line segment connecting the projected point P1 and the projected point P2 is L _J3 , the third junction part B24 in which the second metal part 12 and the intermediate metal part 14 are metal diffusion bonded. preferably satisfies L _J3 /L _M2 ≥0.5. The pipe joint 500 configured to satisfy L _J2 /L _M1 ≥0.5 and satisfy L _J3 /L _M2 ≥0.5 has a second junction B14 and a third junction B24 formed into a tubular shape by metal diffusion bonding. ) is sufficiently larger than that of a conventional dissimilar metal pipe joint. Therefore, in the pipe joint 500 , the joint strength between the first metal part 11 and the second metal part 12 is sufficiently large, and thus the pipe joint 500 is sufficiently practically used.

Similarly, from the viewpoint of improving the mechanical strength of the pipe joint 500 , when the minimum inner diameter in the radial direction (Z direction) of the first metal part 11 is D _M1 , the second joint part B14 is L _J2 /D It is preferable that _M1 ≥2 satisfies, and the third junction B24 satisfies L _J3 /D _M1 ≥2. The pipe joint 500 configured to satisfy L _J2 /D _M1 ≥2 and satisfy L _J3 /D _M1 ≥2 has a second junction B14 and a third junction B24 formed into a tubular shape by metal diffusion bonding. ) is sufficiently larger than that of a conventional dissimilar metal pipe joint. Therefore, in the pipe joint 500 , the joint strength between the first metal part 11 and the second metal part 12 is sufficiently large, and thus the pipe joint 500 is sufficiently practically used.

In the pipe joint 500 , a tubular intermediate metal part 14 is provided between the tubular first metal part 11 and the tubular second metal part 12 , and the first metal part 11 and Metal diffusion between the second metal parts 12 is hindered by the intermediate metal part 14 . Therefore, in the case where the first metal constituting the first metal part 11 and the second metal constituting the second metal part 12 are a combination that is easy to generate a soft intermetallic compound by metal diffusion, the intermediate metal part ( 14), the first metal part 11 and the first metal part 11 and The bonding strength of the intermediate metal portion 14 and the bonding strength between the intermediate metal portion 14 and the second metal portion 12 can be sufficiently increased.

For example, when it is desired to form a pipe joint by combining Cu or Cu alloy, which is easy to form a soft intermetallic compound, and A1 or A1 alloy, an intermediate metal portion 14 made of Ni or Ni alloy, etc. is provided. It is preferable to do In this case, in the pipe joint 500 shown in Fig. 17, the material of the inner side (the first metal portion 11) is Cu or a Cu alloy, and the material of the middle (the intermediate metal portion 14) is Ni or a Ni alloy, The material of the outer side (second metal part 12) may be A1 or a combination of A1 alloy. Moreover, it can also be set as the structure which replaced the material of the inner side and the outer side. By configuring in this way, the pipe joint 500, like the pipe joint 100, can have high mechanical strength to withstand the repetition of reduced pressure and increased pressure, and brazing is also suitable for a pipe (joint pipe) of a material suitable for welding. It becomes a pipe joint that can be easily joined even to a pipe of a material (to-be-joined pipe) while ensuring an appropriate bonding strength.

In the pipe joint 500 , the first metal constituting the first metal part 11 , the third metal constituting the intermediate metal part 14 , and the second metal constituting the second metal part 12 are mutually Any material that can be rolled (clad rolling) in a state of being laminated in the plate thickness direction, and that produces appropriate metal diffusion by heating (heat treatment) after clad rolling is sufficient. The combination of the first metal part 11 (first metal) and the second metal part 12 (second metal) constituting the pipe joint 500 is similar to the pipe joint 100 , and forms the pipe joint 500 . It can be selected according to the type of one pipe and the other pipe to be joined through it. The first metal and the second metal may be selected from the above-described ferrous and non-ferrous materials applicable to the pipe joint 100 . It is preferable to use Ni (NW2200, NW2201, etc. of JIS standard) etc. as a 3rd metal, for example.

The pipe joint 500 can be manufactured by a manufacturing method having a process of manufacturing the clad plate material 5 (refer to FIG. 49), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member. In addition, in the manufacture of the pipe joint 500, the process of manufacturing a tubular member and the process of cutting a tubular part from a tubular member may be considered similar to the pipe joint 100. Therefore, in the manufacture of the pipe joint 500, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the process of manufacturing the clad plate material 5, the first metal plate 11 made of a first metal (for example, Cu) and a second metal different from the first metal (for example, stainless steel or A1) are used. A second metal plate 12 made of, and an intermediate metal plate 14 made of a third metal (for example, Ni) different from the first metal and the second metal are prepared, and the first metal plate 11 and the intermediate metal plate ( 14) and the second metal plate 12 are rolled in a laminated state in the plate thickness direction (X direction). Then, heat treatment is performed under conditions such that metal diffusion occurs between the first metal and the third metal and between the second metal and the third metal. Thereby, the flat first metal layer 11 made of the first metal, the flat intermediate metal layer 14 made of the third metal, and the flat second metal layer 12 made of the second metal are formed. A clad plate 5 as shown in Fig. 49 that is metal diffusion bonded along the plate-shaped plate surface direction (X direction) is produced. Using this clad plate 5, as with the pipe joint 100, a pipe joint having a cylindrical appearance by a process of manufacturing a tubular member by deep drawing molding and a process of cutting the tubular part from the tubular member ( 500) can be produced.

Since the joint area of the metal parts of different materials inside the pipe joint 500 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 500 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of Fifth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 5th structural example is shown in FIG.

The pipe joint 510 shown as a first modified example of the fifth structural example in FIG. 18 is the length in the axial direction (X direction) of the second metal part 12 using the pipe joint 500 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 510 has a step on the outer peripheral side of the first end. Accordingly, the pipe joint 510 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 500 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 500, the pipe joint 510 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 500 can be obtained.

In addition, the pipe joint 510 is configured with respect to the length in the axial direction (X direction) with respect to the second metal part 12 , the intermediate metal part 14 , the second junction part B14 and the third junction part B24 except for the configuration. You may think of it as the same as the pipe joint 500 . Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 510, refer to the description of the pipe joint 500, and here omit

The pipe joint 510 has a process of manufacturing the clad plate material 5 (refer to Fig. 49), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 510, the process of manufacturing the clad plate material 5, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 500. Alternatively, the process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered similar to that of the pipe joint 110 except that a part of the intermediate metal part 14 is removed. Therefore, in the manufacture of the pipe joint 510, for the same process as the pipe joint 500 and the pipe joint 110, refer to the description of the pipe joint 500 and the pipe joint 110, and omitted here do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 500 cut off from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end A pipe joint 510 may be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 510 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 510 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of Fifth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 5th structural example is shown in FIG.

The pipe joint 520 shown as a second modified example of the fifth structural example in FIG. 19 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 500 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 2nd metal part 12 making up. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 is the projected point on the axis PP of the second metal part 12 . It is smaller than the length of the line segment connecting (P1) and the projected point (P3). In addition, the pipe joint 520 has a step on the inner peripheral side of the second end. Therefore, the pipe joint 520 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 500 (the line segment connecting the projection point P1 and the projection point P2). The ratio of the length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P1 and the projection point P2) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 500, the pipe joint 520 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 500 can be obtained.

In addition, the pipe joint 520 is configured with respect to the length of the first metal part 11, the intermediate metal part 14, the second junction part B14 and the third junction part B24 in the axial direction (X direction) except for the configuration. You may think of it as the same as the pipe joint 500 . Therefore, in the pipe joint 520 , the description of the pipe joint 500 is referred to for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal, and the like, and here omit

The pipe joint 520 has a process of manufacturing the clad plate material 5 (refer to Fig. 49), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 520, the process of manufacturing the clad plate material 5, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 500. Alternatively, the process of exposing the inner peripheral surface 12a of the second metal part 12 may be considered similar to that of the pipe joint 120 except that a part of the intermediate metal part 14 is removed. Therefore, in the manufacture of the pipe joint 520, for the same process as the pipe joint 500 and the pipe joint 120, refer to the description of the pipe joint 500 and the pipe joint 120, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 500 cut off from the tubular member having a U-shape in cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. A seam 520 may be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 520 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 520 is difficult to break the joint between the metal parts of different materials as compared to the conventional dissimilar metal pipe joint that is joined at an inclined surface within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third modification of the fifth structural example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 5th structural example is shown in FIG.

The pipe joint 530 shown as a third modified example of the fifth structural example in FIG. 20 includes the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 500 to form a tubular shape, and The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 530 has a step on the outer peripheral side of the first end and the inner peripheral side of the second end. Accordingly, the pipe joint 530 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 500 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 500, the pipe joint 530 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 500 can be obtained.

In addition, the pipe joint 530 is formed in the axial direction X with respect to the first metal part 11 , the second metal part 12 , the intermediate metal part 14 , the second junction part B14 and the third junction part B24 . direction) may be considered to be the same as that of the pipe joint 500 except for the configuration related to the length. Therefore, in the pipe joint 530, the description of the pipe joint 500 is referred to for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, and the like. omit

The pipe joint 530 has a process of manufacturing the clad plate material 5 (refer to Fig. 49), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. It can manufacture by the manufacturing method which has the process of exposing the outer peripheral surface 11b of the 1 metal part 11, and exposing the inner peripheral surface 12a of the 2nd metal part 12 in a 2nd edge part. In addition, in the manufacture of the pipe joint 530, the process of manufacturing the clad plate material 5, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 500. You may think of it, and you may think that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 in a 1st end part is similar to the pipe joint 510, and the inner peripheral surface 12a of the 2nd metal part 12. The process of exposing may be considered to be the same as that of the pipe joint 520 . Therefore, in the manufacture of the pipe joint 530 , the pipe joint 500 , the pipe joint 510 and the pipe joint with respect to the same process as the pipe joint 500 , the pipe joint 510 and the pipe joint 520 . Reference is made to the description of 520 , which will be omitted here. Thereby, using the tubular portion corresponding to the shape of the pipe joint 500 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end It is possible to manufacture a pipe joint 530 having a step on the inner peripheral side of the.

Since the joint area between the metal parts of different materials inside the pipe joint 530 produced by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 530 is difficult to break in the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fourth modification of the fifth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 4th modified example of the 5th structural example is shown in FIG.

The pipe joint 540 shown as a fourth modified example of the fifth structural example in FIG. 21 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 510 is manufactured using the pipe joint 500. . In the pipe joint 540 , it may be considered similar to that of the pipe joint 510 except for the configuration regarding the length of the intermediate metal portion 14 and the second joint portion B14 in the axial direction (X direction). Therefore, for the configuration of the pipe joint 540 other than the combination of the first metal, the third metal, and the second metal, the description of the pipe joint 510 is referred to, and here omit

The pipe joint 540 can be manufactured by a manufacturing method in which a part of the second metal part 12 is removed and the intermediate metal part 14 is left when the pipe joint 510 is manufactured. In addition, in the manufacture of the pipe joint 540, the process of manufacturing the clad plate 5 (refer to FIG. 49), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 500), and the process of exposing the outer peripheral surface 14b of the intermediate metal part 14 may be considered similar to that of the pipe joint 510 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 540, for the same process as the pipe joint 500 and the pipe joint 510, refer to the description of the pipe joint 500 and the pipe joint 510, and omitted here. do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 500 cut off from the tubular member having a U-shaped cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end It is possible to manufacture a pipe joint 540 in which the outer peripheral surface 14b of the intermediate metal part 14 is exposed.

Since the joint area between metal parts of different materials inside the pipe joint 540 of the pipe joint 540 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 540 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fifth modification of the fifth structural example>

As one embodiment of the pipe joint which concerns on this invention, the 5th modified example of the 5th structural example is shown in FIG.

The pipe joint 550 shown as a fifth modified example of the fifth structural example in Fig. 22 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 520 is manufactured using the pipe joint 500. . In the pipe joint 550 , it may be considered similar to the pipe joint 520 , except for the configuration regarding the length of the intermediate metal portion 14 and the third joint portion B24 in the axial direction (X direction). Therefore, in the pipe joint 550 , the description of the pipe joint 520 is referred to for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal, and the like, and here omit

The pipe joint 550 may be manufactured by a manufacturing method in which a part of the first metal part 11 is removed and the intermediate metal part 14 is left when the pipe joint 520 is manufactured. In addition, in the manufacture of the pipe joint 550, the process of manufacturing the clad plate 5 (refer to FIG. 49), the process of manufacturing the tubular member, and the process of cutting the tubular portion from the tubular member are the pipe joints ( 500), and the process of exposing the inner peripheral surface 14a of the intermediate metal part 14 may be considered similar to that of the pipe joint 520 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 550, for the same process as the pipe joint 500 and the pipe joint 520, refer to the description of the pipe joint 500 and the pipe joint 520, and omitted here. do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 500 cut off from the tubular member having a U-shaped cross section in the X direction, the external appearance is cylindrical and has a step difference on the inner periphery of the second end. A pipe joint 550 in which the inner circumferential surface 14a of the intermediate metal part 14 is exposed may be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 550 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 550 is difficult to break in the joint between metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Sixth modification of the fifth structural example>

As one embodiment of the pipe joint which concerns on this invention, the 6th modified example of the 5th structural example is shown in FIG.

The pipe joint 560 shown as a sixth modified example of the fifth structural example in FIG. 23 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 530 is manufactured using the pipe joint 500. . In the pipe joint 560, except for the configuration regarding the length in the axial direction (X direction) with respect to the intermediate metal part 14, the second junction part B14, and the third junction part B24, it is the same as the pipe joint 530. good to think Therefore, in the pipe joint 560, the description of the pipe joint 530 is referred to for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, and the like. omit

The pipe joint 560 can be manufactured by a manufacturing method in which a part of the first metal part 11 and the second metal part 12 is removed and the intermediate metal part 14 is left when the pipe joint 530 is manufactured. there is. In addition, in the manufacture of the pipe joint 560, the process of manufacturing the clad plate material 5 (refer to FIG. 49), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 500), and the process of exposing the outer peripheral surface 14b and the inner peripheral surface 14a of the intermediate metal part 14 is the same as the pipe joint 530 except that the intermediate metal part 14 is not removed and left. You may think that Therefore, in the manufacture of the pipe joint 560, for the same process as the pipe joint 500 and the pipe joint 530, refer to the description of the pipe joint 500 and the pipe joint 530, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 500 cut off from a tubular member having a U-shaped cross section in the X direction, the external appearance is substantially cylindrical, and the first end has a step on the outer periphery side. While the outer circumferential surface 14b of the intermediate metal part 14 is exposed, the pipe joint 560 in which the inner circumferential surface 14a of the intermediate metal part 14 is exposed while having a step difference on the inner peripheral side of the second end can be manufactured there is.

In the pipe joint 560 manufactured by the above manufacturing method, since the joint area between the metal parts of different materials inside the pipe joint 560 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand is obtained. In addition, the pipe joint 560 is difficult to break in the joint between metal parts of different materials compared to a conventional dissimilar metal pipe joint in which an inclined surface is joined within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Sixth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 6th structural example is shown in FIG.

The pipe joint 600 shown as a 6th structural example in FIG. 24 is the tubular shape comprised by the corrosion-resistant metal on the inner peripheral surface 11a of the 1st metal part 11 of the pipe joint 500 shown as a 5th structural example in FIG. of the first covered metal portion 13 (13 _IN ) is further provided. In the pipe joint 600, the configuration according to the combination of the first metal part 11 and the first covering metal part 13 (13 _IN ) is the same as the pipe joint 200 shown as a second structural example in FIG. 5 . You may think that Therefore, in the pipe joint 600, other than the combination of the first metal, the third metal, and the second metal, the configuration and the effect thereof are related to the pipe joint 500 and the pipe joint 200. Reference is made to the description, which is omitted here.

The pipe joint 600 is within the thickness range of the inside of the pipe joint 600, and the fourth junction part B13 forms a tubular shape, so that the area of the fourth junction part B13, that is, the area of the metal diffusion junction part is sufficiently large. get bigger Therefore, as for the pipe joint 600, the joint area of the 1st covering metal part 13 ( _13IN ) and the 1st metal part 11 becomes large enough within the range of the thickness of a pipe joint. When the bonding area of the fourth bonding portion B13 is sufficiently large, the bonding strength between the first covering metal portion 13 ( _13IN ) and the first metal portion 11 can be sufficiently increased. Therefore, the pipe joint 600 further provided with the first covering metal part 13 (13 _IN ) on the inner peripheral surface 11a side of the first metal part 11 of the pipe joint 500 is also the pipe joint 500 and It further has the same high mechanical strength. In addition, like the pipe joint 500, from the viewpoint of improving the mechanical strength, the pipe joint 600 preferably satisfies L _J2 /L _M1 ≥0.5, and preferably satisfies L _J3 /L _M2 ≥0.5, and also L _J2 It is preferable to satisfy /D _M1 ≥2, and L _J3 /D _M1 ≥2.

In addition, since the pipe joint 600 is further provided with a tubular first covering metal part 13 (13 _IN ) on the inner peripheral surface 11a side of the first metal part 11 of the pipe joint 500, Compared to the pipe joint 500 in which the inner peripheral surface 11a of the tubular first metal part 11 composed of a first metal that is not limited to corrosion-resistant metal is exposed, the inner peripheral surface 11a of the pipe joint is high (inner peripheral surface 13a). It has corrosion resistance. In addition, you may think that the pipe joint 600 is similar to the pipe joint 500 except for the structure along the 1st covering metal part 13 ( _13IN ) and the 4th joining part B13. Accordingly, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 600, refer to the description of the pipe joint 500, and here omit

In the pipe joint 600 , the combination of the first coated metal part 13 ( 13 _IN ) and the first metal part 11 , that is, the combination of the corrosion-resistant metal and the first metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding and has adequate metal diffusion by heating (heat treatment) after clad rolling. The first metal may be selected from the above-described ferrous and non-ferrous materials applicable to the pipe joint 600 . It is preferable to use, for example, Ni (NW2200, NW2201, etc. of JIS standard) or Ti (1 type, 2 types, etc. of JIS standard) etc. as a corrosion-resistant metal. For example, when the pipe joined to the inner circumferential surface 11a of the first metal part 11 of the pipe joint 600 is a copper pipe, in consideration of melting during brazing or welding, the first metal is of the same type as the copper pipe. It is preferable to configure the first metal part 11 as Cu or a Cu alloy. And with respect to the inner peripheral surface 13a of the 1st covering metal part 13 ( _13IN ) by making a corrosion-resistant metal into Ni or a Ni alloy, for example, and configuring the 1st covering metal part 13 ( _13IN ) Copper tubes can be brazed or welded. In this case, the second metal portion 12 can be formed using the second metal, for example, stainless steel.

From the same viewpoint, the first metal part 11, the second metal part 12, and the first coated metal part 13 ( _13IN ) constituting the pipe joint 600 are low-carbon steel pipe, aluminum with respect to the copper pipe. It can be set according to the application, such as combining a tube, a nickel tube, a titanium tube, etc., combining a low carbon steel tube, an aluminum tube, a nickel tube, a titanium tube, etc. with respect to a stainless steel tube. In this way, the first metal constituting the first metal part 11 of the pipe joint 600 , the second metal constituting the second metal part 12 , and the first covering metal part 13 ( 13 _IN ) A pipe joint that can be easily joined while ensuring proper bonding strength to both a pipe made of a material suitable for welding (joint pipe) and a pipe made of a material suitable for brazing (joint pipe) by appropriately selecting the corrosion-resistant metal constituting it. becomes

The first covered metal portions 13 ( 13 _IN ) constituting the pipe joint 600 preferably have an appropriately large thickness in order to obtain appropriate corrosion resistance. From this viewpoint, it is preferable that the 1st covering metal part 13 ( _13IN ) is formed by clad rolling which can form a covering metal layer of a larger thickness easily. In addition, depending on the usage environment of the pipe joint 600, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chromium plating layer, or an anodize layer, which is generally smaller than that obtained by clad rolling, is coated with the first coating metal part ( 13) (13 _IN ) can also be used. In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film by plating after forming in the shape of the pipe joint 600 .

The pipe joint 600 can be manufactured by a manufacturing method having a process of manufacturing the clad plate 6 (see FIG. 50 ), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. In addition, in the manufacture of the pipe joint 600, the process of manufacturing a tubular member and the process of cutting a tubular part from a tubular member may be considered similar to the pipe joint 100. Therefore, in the manufacture of the pipe joint 600, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 600, in the process of manufacturing the clad plate 6, the first metal plate 11 made of a first metal (eg, Cu) and a second metal different from the first metal (eg, Cu) For example, a second metal plate 12 made of stainless steel or A1, an intermediate metal plate 14 made of a third metal (for example, Ni) different from the first metal and the second metal, and a corrosion-resistant metal ( For example, a first coated metal plate 13 made of Ni) is further prepared, and the first coated metal plate 13, the first metal plate 11, the intermediate metal plate 14, and the second metal plate 12 are formed to have a plate thickness. It rolls in the state laminated|stacked in the direction (X direction). Then, heat treatment is performed under conditions such that metal diffusion occurs between the corrosion-resistant metal and the first metal, between the first metal and the third metal, and between the third metal and the second metal. Thereby, the flat plate-shaped first covering metal layer 13 constituted of the corrosion-resistant metal, the flat plate-shaped first metal layer 11 constituted of the first metal, and the flat plate-shaped intermediate metal plate 14 constituted by the third metal, , a clad plate 6 as shown in Fig. 50 in which a plate-shaped second metal layer 12 made of a second metal is metal diffusion bonded along the plate-shaped plate plane direction (X direction) is produced. Similar to the pipe joint 100 using this clad plate 6, a pipe joint having a cylindrical appearance by a process of manufacturing a tubular member by deep drawing molding and a process of cutting the tubular part from the tubular member ( 600) can be produced.

In addition, the pipe joint 600 can also be produced by forming a film on the inner peripheral surface 11a of the first metal part 11 of the pipe joint 500 manufactured using the clad plate material 5 by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

Since the joint area of the metal parts of different materials inside the pipe joint 600 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 600 is difficult to break the joint between the metal parts of different materials as compared to the conventional dissimilar metal pipe joint in which the inclined surface is joined within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of 6th Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 6th structural example is shown in FIG.

The pipe joint 610 shown as a first modified example of the sixth structural example in Fig. 25 is the length in the axial direction (X direction) of the second metal part 12 using the pipe joint 600 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 610 has a step on the outer peripheral side of the first end, and the length in the axial direction (X direction) of the intermediate metal part 14 constituting the tubular shape is the first metal part ( 11) is smaller than the length in the axial direction (X direction). Accordingly, the pipe joint 610 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 600 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. The pipe joint 610 considers that the ratio of the length of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 600, for example, the tube diameter (for example, the reference inner diameter) If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 600 can be obtained.

In addition, the pipe joint 610 is configured with respect to the length of the second metal part 12, the intermediate metal part 14, the second junction part B14 and the third junction part B24 in the axial direction (X direction) except for the configuration. You may think of it as the same as the pipe joint 600, and the configuration according to the combination of the first metal part 11 and the first covering metal part 13 ( _13IN ) is shown in FIG. 6 as a first modification of the second configuration example. You may consider it similar to the pipe joint 210 shown. Accordingly, regarding the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 610, the pipe joint 600 and the pipe joint 210 are Reference is made to the description, which is omitted here.

The pipe joint 610 has a process of manufacturing the clad plate material 6 (refer to FIG. 50), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member. 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 610, the process of manufacturing the clad plate material 6, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 600. You may think that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 may be considered similar to the pipe joint 510 . Therefore, in the manufacture of the pipe joint 610, for the same process as the pipe joint 600 and the pipe joint 510, refer to the description of the pipe joint 600 and the pipe joint 510, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 600 cut off from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end A pipe joint 610 may be manufactured.

In the pipe joint 610 manufactured by the above manufacturing method, since the joint area between the metal parts of different materials inside the pipe joint 610 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand is obtained. And, the pipe joint 610 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of 6th Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 6th structural example is shown in FIG.

The pipe joint 620 shown as a second modified example of the sixth structural example in FIG. 26 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 600 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 2nd metal part 12 making up. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 is the projected point on the axis PP of the second metal part 12 . It is smaller than the length of the line segment connecting (P1) and the projected point (P3). In addition, the pipe joint 620 has a step on the inner peripheral side of the second end, and the length in the axial direction (X direction) of the intermediate metal part 14 forming the tubular shape is a second metal part ( 12) is smaller than the length in the axial direction (X direction). Therefore, the pipe joint 620 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 600 (the line segment connecting the projection point P1 and the projection point P2). The ratio of the length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P1 and the projection point P2) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 600, the pipe joint 620 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 600 can be obtained.

In addition, the pipe joint 620 has an axial direction (X direction) with respect to the first metal part 11 , the intermediate metal part 14 , the second junction part B14 , the third junction part B24 , and the fourth junction part B13 . ), except for the configuration regarding the length of the pipe joint 600, it may be considered the same, and the configuration according to the combination of the first metal part 11 and the first metal part 11 and the first covering metal part 13 (13 _IN ) is shown in FIG. You may think that it is similar to the pipe joint 220 shown as a 2nd modified example of a structural example. Accordingly, regarding the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 620, the pipe joint 600 and the pipe joint 220 are related. Reference is made to the description, which is omitted here.

The pipe joint 620 has a process of manufacturing the clad plate material 6 (refer to FIG. 50), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member. 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. In addition, in the manufacture of the pipe joint 620, the process of manufacturing the clad plate material 6, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 600. You can think of it, and the process of exposing the inner peripheral surface 12a of the second metal part 12 is the same as the pipe joint 520 except that a part of the first covering metal part 13 (13 _IN ) is removed. good to think Therefore, in the manufacture of the pipe joint 620, for the same process as the pipe joint 600 and the pipe joint 520, refer to the description of the pipe joint 600 and the pipe joint 520, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 600 cut off from the tubular member having a U-shape in cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. A seam 620 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 620 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 620 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third Modification of 6th Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 6th structural example is shown in FIG.

The pipe joint 630 shown as a third modified example of the sixth configuration example in FIG. 27 is the length of the first metal part 11 forming a tubular shape using the pipe joint 600 in the axial direction (X direction), The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 630 has a step on the outer peripheral side at the first end and does not have an intermediate metal part 14 forming a tubular shape, so the outer circumferential surface 11b of the first metal part 11 forming a tubular shape. This is exposed, the inner peripheral surface 12a of the second metal part 12 having a tubular shape without having a step on the inner peripheral side at the second end and without the intermediate metal part 14 forming a tubular shape is exposed. . Therefore, the pipe joint 630 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 600 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 600, the pipe joint 630 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 600 can be obtained.

In addition, the pipe joint 630 includes a first metal part 11 , a second metal part 12 , an intermediate metal part 14 , a first covering metal part 13 ( 13 _IN ), and a second joint part B14 . , except for the configuration regarding the length in the axial direction (X direction) with respect to the third joint portion B24 and the fourth joint portion B13, it may be considered the same as the pipe joint 600 , and the first metal portion 11 and the first You may think that the structure according to the combination of the covering metal parts 13 ( _13IN ) is the same as the pipe joint 230 shown as a 3rd modified example of the 2nd structural example in FIG. Therefore, regarding the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 630, the pipe joint 600 and the pipe joint 230 are related. Reference is made to the description, which is omitted here.

The pipe joint 630 has a process of manufacturing the clad plate material 6 (refer to FIG. 50), a process of manufacturing a tubular member, and a process of cutting the tubular part from the tubular member, It can be produced by a manufacturing method having a step of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12 at the second end. . In addition, in manufacturing the pipe joint 630, the process of manufacturing the clad plate material 6, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are considered to be the same as those of the pipe joint 600 Alternatively, the process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered the same as that of the pipe joint 610, and the process of exposing the inner peripheral surface 12a of the second metal part 12 is a pipe You may think of it as the same as the joint 620 . Therefore, in the manufacture of the pipe joint 630, the pipe joint 600, the pipe joint 610 and the pipe joint 600, the pipe joint 610 and the pipe joint with respect to the same process as the pipe joint 620. Reference is made to the description of 620 , which will be omitted here. Thereby, using the tubular portion corresponding to the shape of the pipe joint 600 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end It is possible to manufacture a pipe joint 630 having a step difference on the inner peripheral side of the.

Since the joint area between the metal parts of different materials inside the pipe joint 630 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 630 is difficult to break the joint between the metal parts of different materials compared to a conventional dissimilar metal pipe joint that is inclined in the thickness range of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fourth modification of the sixth configuration example>

As one embodiment of the pipe joint according to the present invention, a fourth modification of the sixth structural example is shown in FIG. 28 .

The pipe joint 640 shown as a fourth modified example of the sixth configuration example in Fig. 28 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 610 is manufactured using the pipe joint 600. do. In the pipe joint 640 , it may be considered similar to the pipe joint 610 except for the configuration regarding the length of the intermediate metal portion 14 and the second joint portion B14 in the axial direction (X direction). Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 640, refer to the description of the pipe joint 610, and here omit

The pipe joint 640 may be manufactured by a manufacturing method in which a part of the second metal part 12 is removed and the intermediate metal part 14 is left when the pipe joint 610 is manufactured. In addition, in the manufacture of the pipe joint 640, the process of manufacturing the clad plate 6 (refer to FIG. 50), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 600), and the process of exposing the outer peripheral surface 14b of the intermediate metal part 14 may be considered similar to that of the pipe joint 610 except for leaving the intermediate metal part 14 without removing it. Therefore, in the manufacture of the pipe joint 640, for the same process as the pipe joint 600 and the pipe joint 610, refer to the description of the pipe joint 600 and the pipe joint 610, and omitted here do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 600 cut off from a tubular member having a U-shape in X-direction cross section, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end A pipe joint 640 in which the outer peripheral surface 14b of the intermediate metal part 14 is exposed can be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 640 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 640 is difficult to break in the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fifth modified example of 6th structural example>

As one embodiment of the pipe joint which concerns on this invention, the 5th modified example of the 6th structural example is shown in FIG.

The pipe joint 650 shown as a fifth modified example of the sixth configuration example in Fig. 29 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 620 is manufactured using the pipe joint 600. . In the pipe joint 650, you may consider it similar to the pipe joint 620 except the structure regarding the length of the axial direction (X direction) with respect to the intermediate metal part 14 and the 3rd joint part B24. Therefore, in the pipe joint 650, the description of the pipe joint 620 is referred to for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal, and the like, and here omit

When the pipe joint 650 is manufactured the pipe joint 620, a part of the first covering metal part 13 (13 _IN ) and a part of the first metal part 11 are removed, and the intermediate metal part 14 is formed. It can be produced by the remaining manufacturing method. In addition, in the manufacture of the pipe joint 650, the process of manufacturing the clad plate 6 (refer to FIG. 50), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 600), and the process of exposing the inner peripheral surface 14a of the intermediate metal part 14 may be considered similar to that of the pipe joint 620 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 650, for the process similar to the pipe joint 600 and the pipe joint 620, refer to the description of the pipe joint 600 and the pipe joint 620, and omitted here. do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 600 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is cylindrical and has a step difference on the inner periphery of the second end. The pipe joint 650 in which the inner peripheral surface 14a of the intermediate metal part 14 is exposed may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 650 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 650 is difficult to break in the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Sixth Modification of Sixth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 6th modified example of the 6th structural example is shown in FIG.

The pipe joint 660 shown as a sixth modified example of the sixth configuration example in Fig. 30 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 630 is manufactured using the pipe joint 600. do. In the pipe joint 660, except for the configuration regarding the length in the axial direction (X direction) with respect to the intermediate metal part 14, the second junction part B14 and the third junction part B24, it is the same as the pipe joint 630. good to think Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 660, refer to the description of the pipe joint 630, and here omit

When the pipe joint 660 is manufactured the pipe joint 630, a part of the first metal part 11, a part of the second metal part 12, and a part of the first covering metal part 13 (13 _IN ) It can be manufactured by the manufacturing method which removes it and leaves the intermediate metal part 14. In addition, in the manufacture of the pipe joint 660, the process of manufacturing the clad plate 6 (refer to FIG. 50), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 600), the step of exposing the outer peripheral surface 14b of the first end and the inner peripheral surface 14a of the second end of the intermediate metal portion 14 is to leave the intermediate metal portion 14 without removing it. Other than that, you may think of it as the same as the pipe joint 630 . Therefore, in the manufacture of the pipe joint 660, for the same process as the pipe joint 600 and the pipe joint 630, refer to the description of the pipe joint 600 and the pipe joint 630, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 600 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical, and a step is provided on the outer periphery side of the first end. A pipe joint 660 in which the outer circumferential surface 14b of the intermediate metal part 14 is exposed while having a step difference on the inner circumferential side of the second end portion and the inner circumferential surface 14a of the intermediate metal part 14 is exposed. can

Since the joint area between the metal parts of different materials inside the pipe joint 660 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated in the pipe joint 660 manufactured by the above manufacturing method. A pipe joint with high mechanical strength to withstand the And, the pipe joint 660 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the range of the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Seventh configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 7th structural example is shown in FIG.

The pipe joint 700 shown as a 7th structural example in FIG. 31 is the tubular shape comprised by the corrosion-resistant metal on the outer peripheral surface 12b of the 2nd metal part 12 of the pipe joint 500 shown as a 5th structural example in FIG. of the second coated metal portion 13 (13 _OUT ) is further provided. In the pipe joint 700 , the configuration according to the combination of the second metal part 12 and the second covering metal part 13 ( 13 _OUT ) is the same as the pipe joint 300 shown as a third structural example in FIG. 9 . You may think that Therefore, in the pipe joint 700 , except for the combination of the first metal, the third metal, and the second metal, the configuration and the effect thereof are related to the pipe joint 500 and the pipe joint 300 . Reference is made to the description, which is omitted here.

In the pipe joint 700, the fifth joint portion B23 forms a tubular shape within the thickness range of the inner portion of the tube joint 700, so that the area of the fifth joint portion B23, that is, the area of the metal diffusion joint portion is sufficiently large. get bigger Therefore, as for the pipe joint 700, the joint area of the 2nd covering metal part 13 ( _13OUT ) and the 2nd metal part 12 becomes large enough within the range of the thickness of a pipe joint. When the bonding area of the fifth bonding portion B23 is sufficiently large, the bonding strength between the second covering metal portion 13 ( 13 _OUT ) and the second metal portion 12 can be sufficiently increased. Therefore, the pipe joint 700 further provided with the second covering metal part 13 (13 _OUT ) on the outer peripheral surface 12b side of the second metal part 12 of the pipe joint 500 is also the pipe joint 500 and It further has the same high mechanical strength. In addition, similarly to the pipe joint 500 , from the viewpoint of improving mechanical strength, the pipe joint 700 preferably satisfies L _J2 /L _M1 ≥0.5, and preferably satisfies L _J3 /L _M2 ≥0.5, and also L _J2 It is preferable to satisfy /D _M1 ≥2, and L _J3 /D _M1 ≥2.

In addition, since the pipe joint 700 is further provided with a tubular second coating metal part 13 (13 _OUT ) on the outer peripheral surface 12b side of the second metal part 12 of the pipe joint 500, The outer peripheral surface 12b of the tubular second metal part 12 composed of a second metal that is not limited to corrosion-resistant metal is high on the outside (outer peripheral surface 13b) of the pipe joint as compared to the pipe joint 500 in which it is exposed It has corrosion resistance. In addition, you may think that the pipe joint 700 is similar to the pipe joint 500 except for the structure along the 2nd covering metal part 13 (13 _OUT ) and the 5th joint part B23. Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 700, refer to the description of the pipe joint 500, and here omit

In the pipe joint 700 , the combination of the second metal part 13 ( 13 _OUT ) and the second metal part 12 , that is, the combination of the corrosion-resistant metal and the second metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding and has adequate metal diffusion by heating (heat treatment) after clad rolling. The second metal may be selected from the above-described ferrous and non-ferrous materials applicable to the pipe joint 700 . It is preferable to use, for example, Ni (NW2200, NW2201, etc. of JIS standard) or Ti (1 type, 2 types, etc. of JIS standard) etc. as a corrosion-resistant metal. For example, when the pipe joined to the outer circumferential surface 12b of the second metal part 12 of the pipe joint 700 is a copper pipe, in consideration of melting during brazing or welding, the second metal is of the same type as the copper pipe. It is preferable to configure the second metal part 12 as Cu or a Cu alloy. And with respect to the outer peripheral surface 13b of the 2nd covering metal part 13 ( _13OUT ) by composing the 2nd covering metal part 13 (13 _OUT ) with a corrosion-resistant metal, for example as Ni or a Ni alloy, copper Tubes can be brazed or welded. In this case, the first metal portion 11 can be formed by using, for example, stainless steel as the first metal.

From the same viewpoint, the first metal part 11, the second metal part 12 and the second covering metal part 13 (13 _OUT ) constituting the pipe joint 700 are low-carbon steel pipe, It can be set according to the application, such as combining an aluminum tube, a nickel tube, a titanium tube, etc., combining a low carbon steel tube, an aluminum tube, a nickel tube, a titanium tube, etc. with respect to a stainless steel tube. In this way, the first metal constituting the first metal part 11 of the pipe joint 700 , the second metal constituting the second metal part 12 , and the second covering metal part 13 ( 13 _OUT ) A pipe joint that can be easily joined while ensuring proper bonding strength to both a pipe made of a material suitable for welding (joint pipe) and a pipe made of a material suitable for brazing (joint pipe) by appropriately selecting the corrosion-resistant metal constituting it. becomes

The second covering metal portions 13 ( 13 _OUT ) constituting the pipe joint 700 preferably have an appropriately large thickness in order to obtain appropriate corrosion resistance. From this viewpoint, it is preferable that the 2nd covering metal part 13 (13 _OUT ) is formed by clad rolling which can form a covering metal layer of a larger thickness easily. In addition, depending on the use environment of the pipe joint 700, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chrome plating layer, or an anodite layer, which is generally smaller than that obtained by clad rolling, is coated with a second coating metal part. (13) (13 _OUT ) can also be used. In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film in the shape of the pipe joint 700 and then perform plating treatment or the like to form the film.

The pipe joint 700 can be manufactured by a manufacturing method comprising a step of manufacturing the clad plate 7 (see FIG. 51 ), a step of manufacturing a tubular member, and a step of cutting the tubular portion from the tubular member. In addition, in manufacturing the pipe joint 700, the process of manufacturing a tubular member and the process of cutting a tubular part from a tubular member may be considered similar to the pipe joint 100. Therefore, in the manufacture of the pipe joint 700, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 700, in the process of manufacturing the clad plate 7, the first metal plate 11 made of a first metal (eg, stainless steel or A1), and a product different from the first metal A second metal plate 12 made of a bimetal (for example, Cu), an intermediate metal plate 14 made of a third metal (for example, Ni) different from the first metal and the second metal, and a corrosion-resistant metal A second coated metal plate 13 made of (eg, Ni) is further prepared, and the first metal plate 11 , the intermediate metal plate 14 , the second metal plate 12 , and the second coated metal plate 13 are laminated. It rolls in the state laminated|stacked in the thickness direction (X direction). Then, heat treatment is performed under conditions such that metal diffusion occurs between the first metal and the third metal, between the third metal and the second metal, and between the second metal and the corrosion-resistant metal. Thereby, the flat plate-shaped first metal layer 11 constituted of the first metal, the flat intermediate metal plate 14 constituted of the third metal, and the flat plate-shaped second metal layer 12 constituted of the second metal, , a clad plate 7 as shown in Fig. 51 is produced in which a plate-shaped second coating metal layer 13 made of a corrosion-resistant metal is metal diffusion bonded along the plate-shaped plate plane direction (X direction). Similar to the pipe joint 100 using this clad plate 7, a pipe joint having a cylindrical appearance by a process of manufacturing a tubular member by deep drawing molding and a process of cutting the tubular part from the tubular member ( 700) can be produced.

In addition, the pipe joint 700 can also be produced by forming a film on the outer peripheral surface 12b of the second metal part 12 of the pipe joint 500 manufactured using the clad plate material 5 by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

Since the joint area of the metal parts of different materials inside the pipe joint 700 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 700 is difficult to break in the joint portion between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of Seventh Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 7th structural example is shown in FIG.

The pipe joint 710 shown as a first modified example of the seventh configuration in Fig. 32 is the length in the axial direction (X direction) of the second metal part 12 using the pipe joint 700 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 1st metal part 11 which forms. That is, the length of the line segment connecting the projected point P2 and the projected point P3 projected on the axis PP of the second metal part 12 is the projected point on the axis PP of the first metal part 11 . It is smaller than the length of the line segment connecting (P1) and the projected point (P2). In addition, the pipe joint 710 has a step on the outer peripheral side of the first end, and the length in the axial direction (X direction) of the intermediate metal part 14 constituting the tubular shape is the first metal part ( 11) is smaller than the length in the axial direction (X direction). Therefore, the pipe joint 710 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 600 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 is smaller than that of the tube joint 700, the pipe joint 710 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 700 can be obtained.

In addition, the pipe joint 710 includes a second metal part 12 , an intermediate metal part 14 , a second covering metal part 13 ( 13 _OUT ), a second junction part B14 , a third junction part B24 and Except for the configuration regarding the length in the axial direction (X direction) with respect to the fifth joint portion B23, it may be considered the same as the pipe joint 700, and the second metal portion 12 and the second coated metal portion 13, 13 The configuration according to the combination of _OUT ) may be considered to be the same as that of the pipe joint 310 shown as a first modification of the third configuration example in FIG. 10 . Therefore, in the pipe joint 700 and the pipe joint 310 with respect to the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 710, Reference is made to the related description, which will be omitted here.

The pipe joint 710 has a step of manufacturing the clad plate 7 (see Fig. 51), a step of manufacturing a tubular member, and a step of cutting the tubular portion from the tubular member, and at the first end It can manufacture by the manufacturing method which has the process of exposing the outer peripheral surface 11b of the metal part 11 further. In addition, in the manufacture of the pipe joint 710, the process of manufacturing the clad plate 7, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 700. You can think of it, and the process of exposing the outer peripheral surface 11b of the first metal part 11 is the same as the pipe joint 510 except that a part of the second covering metal part 13 (13 _OUT ) is removed. good to think Therefore, in the manufacture of the pipe joint 710, for the same process as the pipe joint 700 and the pipe joint 510, refer to the description of the pipe joint 700 and the pipe joint 510, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 700 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end A pipe joint 710 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 710 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 710 is difficult to break in the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint in which the inclined surface is joined within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second modification of the seventh configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 7th structural example is shown in FIG.

The pipe joint 720 shown as a second modified example of the seventh structural example in FIG. 33 is the length of the axial direction (X direction) of the first metal part 11 using the pipe joint 700 to form a tubular shape in a tubular shape. It is made smaller than the length in the axial direction (X direction) of the 2nd metal part 12 making up. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 is the projected point on the axis PP of the second metal part 12 . It is smaller than the length of the line segment connecting (P1) and the projected point (P3). In addition, the pipe joint 720 has a step on the inner peripheral side of the second end, and the length in the axial direction (X direction) of the intermediate metal part 14 constituting the tubular shape is the second metal part ( 12) is smaller than the length in the axial direction (X direction). Therefore, the pipe joint 720 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 700 (the line segment connecting the projection point P1 and the projection point P2). The ratio of the length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P1 and the projection point P2) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 700, the pipe joint 720 is, for example, a tube diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 700 can be obtained.

In addition, the pipe joint 720 has a length in the axial direction (X direction) with respect to the first metal part 11, the intermediate metal part 14, the second joint part B14, and the third joint part B24 except for the configuration. You may think of it as the same as the pipe joint 700 , and the configuration according to the combination of the second metal part 12 and the second covering metal part 13 ( 13 _OUT ) is shown in FIG. 11 as a second modification of the third configuration example. You may think of it as the same as the pipe joint 320 shown. Accordingly, regarding the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 720, the pipe joint 700 and the pipe joint 320 are Reference is made to the description, which is omitted here.

The pipe joint 720 has a step of manufacturing the clad plate 7 (see Fig. 51), a step of manufacturing a tubular member, and a step of cutting the tubular portion from the tubular member, and the second end 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 720, the process of manufacturing the clad plate 7, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 700. You may think that the process of exposing the inner peripheral surface 12a of the 2nd metal part 12 may be considered similar to the pipe joint 520 . Therefore, in the manufacture of the pipe joint 720, for the process similar to the pipe joint 700 and the pipe joint 520, refer to the description of the pipe joint 700 and the pipe joint 520, and omitted here do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 700 cut off from a tubular member having a U-shape in cross section in the X direction, a tube having a cylindrical appearance and a step on the inner periphery of the second end A seam 720 may be manufactured.

Since the joint area of the metal parts of different materials inside the pipe joint 720 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 720 is difficult to break the joint between the metal parts of different materials as compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third modification of the seventh configuration example>

34 shows a third modified example of the seventh configuration example as one embodiment of the pipe joint according to the present invention.

The pipe joint 730 shown in FIG. 34 as a third modified example of the seventh configuration example includes the length of the first metal part 11 forming a tubular shape using the pipe joint 700 in the axial direction (X direction), the pipe The lengths in the axial direction (X direction) of the second metal portions 12 forming the shape are made substantially equal. That is, the length of the line segment connecting the projected point P1 and the projected point P2 projected on the axis PP of the first metal part 11 and the projection projected on the axis PP of the second metal part 12 The length of the line segment connecting the point P3 and the projected point P4 is approximately equal. In addition, the pipe joint 730 has a step on the outer peripheral side at the first end and does not have the intermediate metal part 14 forming a tubular shape, so the outer circumferential surface 11b of the first metal part 11 forming a tubular shape. This is exposed, the inner peripheral surface 12a of the second metal part 12 having a tubular shape without having a step on the inner peripheral side at the second end and without the intermediate metal part 14 forming a tubular shape is exposed. . Therefore, the pipe joint 730 is the length of the second junction part B14 forming a tubular shape that is metal diffusion bonded compared to the pipe joint 700 (the line segment connecting the projection point P2 and the projection point P3). The ratio of length) and the length of the 3rd junction part B24 (the length of the line segment which connects the projection point P2 and the projection point P3) becomes small. Considering that the ratio of the lengths of the second joint portion B14 and the third joint portion B24 becomes smaller than that of the tube joint 700, the pipe joint 730 is, for example, a pipe diameter (for example, a reference inner diameter). If adjustment such as enlargement is made, the area along the axial direction (X direction) of the second junction part B14 and the third junction part B24 forming the tubular shape, that is, the first metal part 11 and the intermediate metal part 14 ) and the bonding area between the second metal part 12 and the intermediate metal part 14 can be increased, so that the joint strength equivalent to that of the pipe joint 700 can be obtained.

In addition, the pipe joint 730 includes the first metal part 11 , the second metal part 12 , the intermediate metal part 14 , the second covering metal part 13 ( 13 _OUT ), and the second junction part B14 . , except for the configuration regarding the length in the axial direction (X direction) with respect to the third joint portion B24 and the fifth joint portion B23, it may be considered the same as the pipe joint 700 , and the second metal portion 12 and the second You may think that the structure according to the combination of the covering metal parts 13 ( _13OUT ) is the same as the pipe joint 330 shown as a 3rd modified example of a 3rd structural example in FIG. Therefore, regarding the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 730, the pipe joint 700 and the pipe joint 330 are related. Reference is made to the description, which is omitted here.

The pipe joint 730 has a process of manufacturing the clad plate 7 (refer to Fig. 51), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. It can be produced by a manufacturing method having a step of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12 at the second end. . In addition, in the manufacture of the pipe joint 730, the process of manufacturing the clad plate 7, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 700. You may think of it, and the process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered the same as that of the pipe joint 710, and the process of exposing the inner peripheral surface 12a of the second metal part 12 is You may think of it as the same as the pipe joint 720 . Therefore, in the manufacture of the pipe joint 730, the pipe joint 700, the pipe joint 710 and the pipe joint with respect to the same process as the pipe joint 700, the pipe joint 710, and the pipe joint 720. Reference is made to the description of 720 , which is omitted here. Thereby, by using the tubular portion corresponding to the shape of the pipe joint 700 cut out from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end A pipe joint 730 having a step difference on the inner circumferential side may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 730 of the pipe joint 730 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 730 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fourth modification of the seventh configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 4th modified example of the 7th structural example is shown in FIG.

The pipe joint 740 shown in Fig. 35 as a fourth modified example of the seventh configuration example corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 710 is manufactured using the pipe joint 700. . In the pipe joint 740 , it may be considered similar to that of the pipe joint 710 except for the configuration regarding the length of the intermediate metal portion 14 and the second joint portion B14 in the axial direction (X direction). Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 740, refer to the description of the pipe joint 710, and here omit

When the pipe joint 740 is manufactured the pipe joint 710, a part of the second covering metal part 13 (13 _OUT ) and a part of the second metal part 12 are removed, and the intermediate metal part 14 is formed. It can be produced by the remaining manufacturing method. In addition, in the manufacture of the pipe joint 740, the process of manufacturing the clad plate 7 (refer to FIG. 51), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 700), and the process of exposing the outer peripheral surface 14b of the intermediate metal part 14 may be considered similar to that of the pipe joint 710 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 740, for the process similar to the pipe joint 700 and the pipe joint 710, refer to the description of the pipe joint 700 and the pipe joint 710, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 700 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end It is possible to manufacture a pipe joint 740 in which the outer peripheral surface 14b of the intermediate metal part 14 is exposed.

Since the joint area between the metal parts of different materials inside the pipe joint 740 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range of the pipe joint 740 manufactured by the manufacturing method, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 740 is difficult to break in the joint between metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<The fifth modification of the seventh configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 5th modified example of the 7th structural example is shown in FIG.

The pipe joint 750 shown as a fifth modified example of the seventh structural example in FIG. 36 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 720 is manufactured using the pipe joint 700. . In the pipe joint 750, you may consider it similar to the pipe joint 720 except for the structure regarding the length of the axial direction (X direction) with respect to the intermediate metal part 14 and the 3rd joint part B24. Therefore, in the pipe joint 750 , the description of the pipe joint 720 is referred to for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, and the like. omit

The pipe joint 750 may be manufactured by a manufacturing method in which a part of the first metal part 11 is removed and the intermediate metal part 14 is left when the pipe joint 720 is manufactured. In addition, in the manufacture of the pipe joint 750, the process of manufacturing the clad plate 7 (refer to FIG. 51), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 700), and the process of exposing the inner peripheral surface 14a of the intermediate metal part 14 may be considered similar to that of the pipe joint 720 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 750, for the same process as the pipe joint 700 and the pipe joint 720, refer to the description of the pipe joint 700 and the pipe joint 720, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 700 cut off from the tubular member having a U-shaped cross section in the X direction, the external appearance is cylindrical and has a step on the inner peripheral side of the second end. A pipe joint 750 in which the inner circumferential surface 14a of the intermediate metal part 14 is exposed may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 750 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 750 is difficult to break in the joint between metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Sixth modification of the seventh configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 6th modified example of the 7th structural example is shown in FIG.

A pipe joint 760 shown as a sixth modified example of the seventh structural example in FIG. 37 corresponds to a configuration left without removing the intermediate metal portion 14 when the pipe joint 730 is manufactured using the pipe joint 700. . In the pipe joint 760, it is the same as the pipe joint 730 except for the configuration regarding the length in the axial direction (X direction) with respect to the intermediate metal part 14, the second joint part B14, and the third joint part B24. good to think Therefore, in the pipe joint 760 , the description of the pipe joint 730 is referred to for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, and the like. omit

The pipe joint 760 is a part of the first metal part 11, a part of the second metal part 12, and a part of the second covering metal part 13 (13 _OUT ) when the pipe joint 730 is manufactured. It can be manufactured by the manufacturing method which removes it and leaves the intermediate metal part 14. In addition, in the manufacture of the pipe joint 760, the process of manufacturing the clad plate 7 (refer to FIG. 51), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joint ( 700), the step of exposing the outer peripheral surface 14b of the first end and the inner peripheral surface 14a of the second end of the intermediate metal portion 14 is to leave the intermediate metal portion 14 without removing it. Other than that, you may think of it as the same as the pipe joint 730 . Therefore, in the manufacture of the pipe joint 760, for the same process as the pipe joint 700 and the pipe joint 730, refer to the description of the pipe joint 700 and the pipe joint 730, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 700 cut off from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery side of the first end While the outer peripheral surface 14b of the intermediate metal part 14 is exposed, as well as having a step on the inner peripheral side of the second end portion, a pipe joint 760 in which the inner peripheral surface 14a of the intermediate metal part 14 is exposed can be manufactured. .

In the pipe joint 760 manufactured by the above manufacturing method, since the joint area between the metal parts of different materials inside the pipe joint 760 is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand is obtained. In addition, the pipe joint 760 is difficult to break in the joint between the metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Eighth configuration example>

As one embodiment of the pipe joint which concerns on this invention, the 8th structural example is shown in FIG.

The pipe joint 800 shown as an 8th structural example in FIG. 38 is the tubular shape comprised by the corrosion-resistant metal on the inner peripheral surface 11a of the 1st metal part 11 of the pipe joint 500 shown as a 5th structural example in FIG. A _tubular second covering metal portion 13 ( 13 _OUT ) is to be further provided. In addition, in the pipe joint 800, the structure along the 1st covered metal part 13 ( _13IN ) and the 1st metal part 11 may be considered to be the same as that of the pipe joint 600, and the 2nd covered metal part (13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 700 . Accordingly, the pipe joint 800 may have a high mechanical strength to withstand repeated pressure reduction and pressure increase, like the pipe joint 600 or the pipe joint 700 , that is, like the pipe joint 500 . In addition, similarly to the pipe joint 500 , from the viewpoint of improving the mechanical strength, the pipe joint 800 preferably satisfies L _J2 /L _M1 ≥0.5, and preferably satisfies L _J3 /L _M2 ≥0.5, and also L It is preferable to satisfy _J2 /D _M1 ≥2, and satisfy L _J3 /D _M1 ≥2.

In addition, the pipe joint 800 is further provided with a tubular first coated metal part 13 (13 _IN ) on the inner peripheral surface 11a of the first metal part 11 of the pipe joint 500, and the second Since the tubular second covering metal part 13 (13 _OUT ) is further provided on the outer peripheral surface 12b of the 2 metal part 12, a tubular product made of a first metal that is not limited to a corrosion-resistant metal is used. A pipe joint 500 in which the inner peripheral surface 11a of the first metal part 11 is exposed and the outer peripheral surface 12b of the tubular second metal part 12 made of a second metal not limited to a corrosion-resistant metal is exposed ), it has high corrosion resistance on the inside (inner peripheral surface 13a) and outside (outer peripheral surface 13b) of the pipe joint. In addition, the pipe joint 800 is configured according to the first covered metal portion 13 ( 13 _IN ), the second coated metal portion 13 ( 13 _OUT ), the fourth joint portion B13 and the fifth joint portion B23 . Other than that, you may think of it as the same as the pipe joint 500 . Therefore, for the configuration and effects thereof other than the combination of the first metal, the third metal, and the second metal in the pipe joint 800, refer to the description of the pipe joint 500, and here omit

In the pipe joint 800 , the combination of the first coated metal part 13 ( 13 _IN ) and the first metal part 11, that is, the combination of the corrosion-resistant metal and the first metal, is a state in which each other is laminated in the plate thickness direction. It may be any material that can be rolled (clad rolling) in the cladding and has adequate metal diffusion by heating (heat treatment) after clad rolling. The combination of the second covering metal portion 13 ( 13 _OUT ) and the second metal portion 12 , that is, the combination of the corrosion-resistant metal and the second metal is also the same. In addition, the first metal constituting the first metal part 11, the second metal constituting the second metal part 12, the corrosion-resistant metal constituting the first covering metal part 13 ( _13IN ), and the second The selection of the corrosion-resistant metal constituting the coated metal portion 13 (13 _OUT ) may be performed in the same manner as the pipe joint 600 and the pipe joint 700, see the description of the pipe joint 600 and the pipe joint 700 and a description thereof will be omitted.

The first coated metal portion 13 ( 13 _IN ) and the second coated metal portion 13 ( 13 _OUT ) constituting the pipe joint 800 preferably have a suitably large thickness in order to obtain appropriate corrosion resistance. From this point of view, the first covering metal portion 13 ( 13 _IN ) and the second covering metal portion 13 ( 13 _OUT ) are formed by clad rolling which can easily form a covering metal layer of a larger thickness. it is preferable In addition, depending on the usage environment of the pipe joint 800, a coating having corrosion resistance, such as a nickel plating layer, a nickel phosphorus plating layer, a nickel chrome plating layer, or an anodite layer, which is generally smaller in thickness than that obtained by clad rolling, is coated on the first coated metal part ( 13) (13 _IN ) and the second covering metal portion 13 ( 13 _OUT ) can also be used. In this case, in consideration of the risk of damage to the film due to deep drawing molding, it is preferable to form the film by plating after forming in the shape of the pipe joint 500 .

The pipe joint 800 can be manufactured by a manufacturing method having a step of manufacturing the clad plate material 8 (see Fig. 52), a step of manufacturing a tubular member, and a step of cutting the tubular portion from the tubular member. In addition, in manufacturing the pipe joint 800, the process of manufacturing a tubular member and the process of cutting a tubular part from a tubular member may be considered as the same as that of the pipe joint 100. Therefore, in the manufacture of the pipe joint 800, for the process similar to that of the pipe joint 100, reference is made to the description of the pipe joint 100, and is omitted here.

In the manufacturing of the pipe joint 800, in the process of manufacturing the clad plate 8, the first metal plate 11 made of a first metal (eg, Cu) and a second metal different from the first metal (eg, Cu) For example, a second metal plate 12 made of stainless steel or A1, an intermediate metal plate 14 made of a third metal (eg, Ni) different from the first metal and the second metal, and a corrosion-resistant metal ( For example, the first coated metal plate 13 ( 13 _IN ) and the second coated metal plate 13 ( 13 _OUT ) made of Ni) are further prepared, and the first coated metal plate 13 ( 13 _IN ) and the first It is rolled in the state which laminated|stacked the metal plate 11, the intermediate|middle metal plate 14, the 2nd metal plate 12, and the 2nd covering metal plate 13 ( _13OUT ) in the plate|board thickness direction (X direction). Then, the heat treatment is performed under conditions such that metal diffusion occurs between the corrosion-resistant metal and the first metal, between the first metal and the third metal, between the third metal and the second metal, and between the second metal and the corrosion-resistant metal. Thereby, the flat plate-shaped 1st covering metal layer 13 ( _13IN ) comprised by the corrosion-resistant metal, the flat plate-shaped 1st metal layer 11 comprised by the 1st metal, and the flat intermediate metal plate comprised by the 3rd metal (14), a flat plate-shaped second metal layer 12 made of a second metal, and a flat plate-shaped second covering metal layer 13 (13 _OUT ) made of a corrosion-resistant metal along the flat plate plane direction (X direction) A clad plate 8 as shown in Fig. 52 that is metal diffusion bonded is produced. Similar to the pipe joint 100 using this clad plate 8, a pipe joint having a cylindrical appearance by the process of producing a tubular member by deep drawing molding and the process of cutting the tubular part from the tubular member (800) can be crafted.

In addition, the pipe joint 800 is the inner peripheral surface 11a of the first metal part 11 of the pipe joint 500 manufactured using the clad plate 5 and the outer peripheral surface 12b of the second metal part 12. It can also be produced by forming a film by plating or the like. The film in this case can be selected according to the application, and a nickel plated film, a chrome plated film, a nickel chromium plated film, an anodized film, etc. are preferable, and the film can be multilayered.

Since the joint area of the metal parts of different materials inside the pipe joint 800 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 800 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<First Modification of Eighth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 1st modified example of the 8th structural example is shown in FIG.

The pipe joint 810 shown as a first modified example of the eighth structural example in FIG. 39 is the axial direction (X direction) length of the second metal part 12 using the pipe joint 800 to form a tubular shape. It is made smaller than the length in the axial direction (X direction) of the first metal part 11 _constituting The configuration according to (11) may be considered to be the same as that of the pipe joint 610 , and the configuration along the second covering metal part 13 ( 13 _OUT ) and the second metal part 12 is considered to be the same as the pipe joint 710 . also good Accordingly, the pipe joint 810, like the pipe joint 610 or the pipe joint 710, may have high mechanical strength to withstand repeated pressure reduction and pressure increase. Further, similarly to the pipe joint 610 or the pipe joint 710, from the viewpoint of improving the mechanical strength, the pipe joint 810 must satisfy L _J2 /L _M1 ≥0.5, and L _J3 /L _M2 ≥0.5. Preferably, it also satisfies L _J2 /D _M1 ≧2, and it is also desirable to satisfy L _J3 /D _M1 ≧2.

In addition, the pipe joint 810 includes a second metal part 12 , an intermediate metal part 14 , a second covering metal part 13 ( 13 _OUT ), a second junction part B14 , a third junction part B24 and You may think that it is similar to the pipe joint 800 except the structure regarding the length of the axial direction (X direction) with respect to the 5th joint part B23. Therefore, in the pipe joint 810, except for the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the description of the pipe joint 800 is given with respect to the configuration and its effects and the like. reference, and omitted here.

The pipe joint 810 has a step of manufacturing the clad plate material 8 (refer to Fig. 52), a step of manufacturing a tubular member, and a step of cutting the tubular portion from the tubular member. 1 It can manufacture by the manufacturing method which has a process of exposing the outer peripheral surface 11b of the metal part 11. As shown in FIG. In addition, in the manufacture of the pipe joint 810, the process of manufacturing the clad plate material 8, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as those of the pipe joint 800. You may think about it, and you may consider that the process of exposing the outer peripheral surface 11b of the 1st metal part 11 is the same as that of the pipe joint 710 . Therefore, in the manufacture of the pipe joint 810, for the process similar to the pipe joint 800 and the pipe joint 710, refer to the description of the pipe joint 800 and the pipe joint 710, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 800 cut off from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and has a step on the outer periphery of the first end A pipe joint 810 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 810 of the pipe joint 810 manufactured by the above manufacturing method is sufficiently larger than that of a conventional heterogeneous metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 810 is difficult to break in the joint between metal parts of different materials compared to the conventional dissimilar metal pipe joint in which the inclined surface is joined within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Second Modification of Eighth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 2nd modified example of the 8th structural example is shown in FIG.

The pipe joint 820 shown as a second modified example of the eighth structural example in FIG. 40 is the length in the axial direction (X direction) of the first metal part 11 using the pipe joint 800 to form a tubular shape. It is made smaller than the length of the axial direction (X direction) of the 2nd metal part 12 which makes up. In addition, in the pipe joint 820 , the configuration according to the first metal part 13 ( 13 _IN ) and the first metal part 11 may be considered to be the same as that of the pipe joint 620 , and the second metal part 13 IN . (13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 720 . Accordingly, the pipe joint 820 may have high mechanical strength to withstand repeated pressure reduction and pressure increase, similar to the pipe joint 620 or the pipe joint 720 . In addition, similarly to the pipe joint 620 or the pipe joint 720 , from the viewpoint of improving mechanical strength, the pipe joint 820 satisfies L _J2 /L _M1 ≥ 0.5, and L _J3 /L _M2 ≥ 0.5 is satisfied. Preferably, it also satisfies L _J2 /D _M1 ≧2, and it is also desirable to satisfy L _J3 /D _M1 ≧2.

In addition, the pipe joint 820 includes a first metal part 11 , an intermediate metal part 14 , a first covering metal part 13 ( 13 _IN ), a second junction part B14 , a third junction part B24 and You may consider it similar to the pipe joint 800 except the structure regarding the length of the axial direction (X direction) with respect to the 4th joint part B13. Therefore, in the pipe joint 820, other than the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the configuration and the effect thereof, etc. reference, and omitted here.

The pipe joint 820 has a process of manufacturing the clad plate material 8 (refer to Fig. 52), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. 2 It can manufacture by the manufacturing method which has the process of exposing the inner peripheral surface 12a of the metal part 12. As shown in FIG. In addition, in the manufacture of the pipe joint 820, the process of manufacturing the clad plate material 8, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 800. You may think that the process of exposing the inner peripheral surface 12a of the 2nd metal part 12 may be considered similar to the pipe joint 620 . Therefore, in the manufacture of the pipe joint 820, for the same process as the pipe joint 800 and the pipe joint 620, refer to the description of the pipe joint 800 and the pipe joint 620, and omitted here do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 800 cut off from the tubular member having a U-shape in cross section in the X direction, the tube has a cylindrical appearance and a step on the inner periphery of the second end. A seam 820 may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 820 of the pipe joint 820 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 820 is difficult to break in the joint between metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Third Modification of Eighth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 3rd modified example of the 8th structural example is shown in FIG.

The pipe joint 830 shown as a third modified example of the eighth structural example in FIG. 41 is the length of the first metal part 11 forming a tubular shape using the pipe joint 800 in the axial direction (X direction), The length in the axial direction (X direction) of the second metal portion 12 forming the shape is made substantially equal. In addition, in the pipe joint 830, the structure along the 1st covered metal part 13 ( _13IN ) and the 1st metal part 11 may be considered to be the same as that of the pipe joint 630, and the 2nd covered metal part (13) (13 _OUT ) and the configuration according to the second metal portion 12 may be considered to be the same as the pipe joint 730 . Accordingly, the pipe joint 830, like the pipe joint 630 or the pipe joint 730, may have high mechanical strength to withstand repeated pressure reduction and pressure increase. In addition, the pipe joint 830, like the pipe joint 630 or the pipe joint 730, satisfy L _J2 /L _M1 ≥0.5, and L _J3 /L _M2 ≥0.5 from the viewpoint of improving mechanical strength. Preferably, it also satisfies L _J2 /D _M1 ≧2, and it is also desirable to satisfy L _J3 /D _M1 ≧2.

In addition, the pipe joint 830 includes a first metal part 11 , a second metal part 12 , an intermediate metal part 14 , a first covering metal part 13 ( 13 _IN ), a second covering metal part ( 13) (13 _OUT ), the second joint portion (B14), the third joint portion (B24), the fourth joint portion (B13), and the fifth joint portion (B23), except for the configuration regarding the length in the axial direction (X direction) pipe joint (800) can be considered as the same. Therefore, in the pipe joint 830, except for the combination of the first metal and the corrosion-resistant metal and the combination of the second metal and the corrosion-resistant metal, the configuration and the effect thereof, etc. reference, and omitted here.

The pipe joint 830 has a process of manufacturing the clad plate material 8 (refer to Fig. 52), a process of manufacturing a tubular member, and a process of cutting the tubular portion from the tubular member. It can be produced by a manufacturing method having a step of exposing the outer peripheral surface 11b of the first metal part 11 and exposing the inner peripheral surface 12a of the second metal part 12 at the second end. . In addition, in the manufacture of the pipe joint 830, the process of manufacturing the clad plate 8, the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the same as the pipe joint 800. You may think of it, and the process of exposing the outer peripheral surface 11b of the first metal part 11 may be considered to be the same as that of the pipe joint 810, and the process of exposing the inner peripheral surface 12a of the second metal part 12 is You may think of it as the same as the pipe joint 820 . Therefore, in the manufacture of the pipe joint 830, the pipe joint 800, the pipe joint 810, and the pipe joint 800, the pipe joint 810 and the pipe joint with respect to the same process as the pipe joint 820. Reference is made to the description of 820 , which will be omitted herein. Thereby, using the tubular portion corresponding to the shape of the pipe joint 800 cut out from the tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical and the outer peripheral side of the first end and the second end It is possible to manufacture a pipe joint 830 having a step on the inner peripheral side of the.

Since the joint area of the metal parts of different materials inside the pipe joint 830 of the pipe joint 830 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 830 is difficult to break in the joint between metal parts of different materials as compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fourth Modification of Eighth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 4th modified example of the 8th structural example is shown in FIG.

The pipe joint 840 shown as a fourth modified example of the eighth structural example in Fig. 42 corresponds to a configuration left without removing the intermediate metal portion 14 when the pipe joint 810 is manufactured using the pipe joint 800. do. In the pipe joint 840 , it may be considered similar to the pipe joint 810 except for the configuration regarding the length of the intermediate metal portion 14 and the second joint portion B14 in the axial direction (X direction). Therefore, in the pipe joint 840, the description of the pipe joint 810 is referred to for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, etc. omit

When the pipe joint 840 is manufactured, the second covering metal part 13 ( 13 _OUT ) and a part of the second metal part 12 are removed, leaving the intermediate metal part 14 . method can be produced. In addition, in the manufacture of the pipe joint 840, the process of manufacturing the clad plate 8 (refer to FIG. 52), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joints ( 800), and the process of exposing the outer peripheral surface 14b of the intermediate metal part 14 may be considered similar to that of the pipe joint 810 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 840, for the same process as the pipe joint 800 and the pipe joint 810, refer to the description of the pipe joint 800 and the pipe joint 810, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 800 cut off from a tubular member having a U-shaped cross section in the X direction, the external appearance is substantially cylindrical and has a step difference on the outer periphery of the first end. A pipe joint 840 in which the outer peripheral surface 14b of the intermediate metal part 14 is exposed may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 840 of the pipe joint 840 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 840 is difficult to break in the joint portion between metal parts of different materials compared to a conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Fifth Modification of Eighth Structural Example>

43 shows a fifth modified example of the eighth structural example as one embodiment of the pipe joint according to the present invention.

The pipe joint 850 shown as a fifth modified example of the eighth structural example in Fig. 43 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 820 is manufactured using the pipe joint 800. do. In the pipe joint 850, it may be considered similar to the pipe joint 820 except for the configuration regarding the length in the axial direction (X direction) with respect to the intermediate metal portion 14 and the third joint portion B24. Therefore, in the pipe joint 850, for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, refer to the description of the pipe joint 820, and here omit

The pipe joint 850 may be manufactured by a manufacturing method in which a part of the first metal part 11 is removed and the intermediate metal part 14 is left when the pipe joint 820 is manufactured. In addition, in the manufacture of the pipe joint 850, the process of manufacturing the clad plate 8 (refer to FIG. 52), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joint ( 800), and the process of exposing the inner peripheral surface 14a of the intermediate metal part 14 may be considered similar to that of the pipe joint 820 except that the intermediate metal part 14 is left without removing it. Therefore, in the manufacture of the pipe joint 850, for the same process as the pipe joint 800 and the pipe joint 820, refer to the description of the pipe joint 800 and the pipe joint 820, and omitted here. do. Thereby, using the tubular portion corresponding to the shape of the pipe joint 800 cut off from the tubular member having a U-shaped cross section in the X direction, the external appearance is cylindrical and has a step difference on the inner periphery of the second end. A pipe joint 850 in which the inner circumferential surface 14a of the intermediate metal part 14 is exposed may be manufactured.

Since the joint area between the metal parts of different materials inside the pipe joint 850 of the pipe joint 850 manufactured by the above manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the And, the pipe joint 850 is difficult to break the joint between the metal parts of different materials compared to the conventional dissimilar metal pipe joint that is sloped within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Sixth Modification of Eighth Structural Example>

As one embodiment of the pipe joint which concerns on this invention, the 6th modified example of the 8th structural example is shown in FIG.

The pipe joint 860 shown as a sixth modified example of the eighth structural example in Fig. 44 corresponds to the configuration left without removing the intermediate metal portion 14 when the pipe joint 830 is manufactured using the pipe joint 800. do. In the pipe joint 860, except for the configuration regarding the length in the axial direction (X direction) with respect to the intermediate metal part 14, the second junction part B14, and the third junction part B24, it is the same as the pipe joint 830. good to think Therefore, in the pipe joint 860, for the configuration other than the combination of the first metal, the third metal, and the second metal, and the effect thereof, refer to the description of the pipe joint 830, and here omit

The pipe joint 860 is formed by removing a portion of the first metal part 11, the second metal part 12, and the second covering metal part 13 (13 _OUT ) when manufacturing the pipe joint 830, and the middle It can be manufactured by the manufacturing method which leaves the metal part 14. In addition, in the manufacture of the pipe joint 860, the process of manufacturing the clad plate material 8 (refer to FIG. 52), the process of manufacturing the tubular member, and the process of cutting the tubular part from the tubular member are the pipe joint ( 800), the step of exposing the outer peripheral surface 14b of the first end and the inner peripheral surface 14a of the second end of the intermediate metal portion 14 is to leave the intermediate metal portion 14 without removing it. Other than that, you may think of it as the same as the pipe joint 830. Therefore, in the manufacture of the pipe joint 860, for the same process as the pipe joint 800 and the pipe joint 830, refer to the description of the pipe joint 800 and the pipe joint 830, and omitted here. do. Thereby, using a tubular portion corresponding to the shape of the pipe joint 800 cut off from a tubular member having a U-shape in cross section in the X direction, the external appearance is substantially cylindrical, and a step is provided on the outer periphery side of the first end. A pipe joint 860 in which the outer circumferential surface 14b of the intermediate metal part 14 is exposed while having a step, and the inner circumferential surface 14a of the intermediate metal part 14 is exposed while having a step on the inner circumferential side of the second end. can

Since the joint area between the metal parts of different materials inside the pipe joint 860 of the pipe joint 860 manufactured by the manufacturing method is sufficiently larger than that of a conventional dissimilar metal pipe joint within the thickness range, the pressure reduction and pressure increase are repeated. A pipe joint with high mechanical strength to withstand the In addition, the pipe joint 860 is difficult to break in the joint portion between metal parts of different materials compared to a conventional dissimilar metal pipe joint in which an inclined surface is joined within the thickness of the pipe joint, so brazing or welding (TIG welding, The construction of piping by laser welding, electron beam welding, etc.) becomes easy.

<Modifications other than the above>

The present invention is not limited to the application to the concentric and same diameter pipe joints exemplified as the above-described first configuration example (pipe joint 100) to eighth configuration example (pipe joint 800) and variants thereof. . The present invention can be applied to a concentric pipe joint capable of connecting two pipes having different internal diameters and having a difference in diameter. The present invention is also applicable to a pipe joint such as a reducer in which the first end of the one side (X1 side) or the second end of the other side (X2 side) in the axial direction (X direction) is appropriately enlarged.

<Piping example of pipe joint>

Two pipes having different materials can be joined by using the above-described pipe joint 100 (first configuration example) to pipe joint 800 (8th configuration example) and their modifications. In this case, the combination of the two pipes is various, but for example, a low-carbon steel pipe, a stainless steel pipe, an aluminum pipe, a nickel pipe, a titanium pipe, etc. are combined with a copper pipe, or a low-carbon steel pipe, an aluminum pipe, with a stainless steel pipe, A nickel tube, a titanium tube, etc. can be combined.

For example, as shown in FIG. 56, on the X1 side (1st end side) of the pipe joint 100 (1st structural example), WHEREIN: A first metal part (for example, C1020, A5052, etc.) composed of an outer peripheral surface 50b on the X2 side and a first metal (for example, C1020, A5052, etc.) having good brazing bonding properties of this tube 50 (for example, phosphorus copper brazing wire, etc.) The inner peripheral surface 11a of 11) can be joined at the position of the joint part C50 by brazing. And in the X2 side (second end side) of the pipe joint 100, the inner peripheral surface 51a of the X1 side of the pipe 51 (for example, a stainless steel pipe etc.), and the weldability of this pipe 51 The outer peripheral surface 12b of the second metal part 12 made of a good second metal (eg, SUS304, etc.) (eg, electron beam welding, etc.) is joined at the position of the junction part C51 by welding. can Thereby, using the pipe joint 100, the pipe 50 (eg, copper pipe, aluminum pipe, etc.) and the pipe 51 (eg, stainless steel pipe, etc.) of different materials can be joined. can

Moreover, for example, as shown in FIG. 57, in the X1 side (1st end side) of the pipe joint 110 (2nd modified example of 1st structural example), the pipe 52 (for example, copper pipe) , aluminum tube, etc.) with the inner peripheral surface 52a on the X2 side and a first metal (for example, C1020, A5052, etc.) having good brazing bonding properties (for example, phosphor copper brazing, etc.) of this tube 52 The outer peripheral surface 11b of the configured first metal portion 11 can be joined at the position of the joint portion C52 by brazing. And in the X2 side (second end side) of the pipe joint 110, the inner peripheral surface 51a of the X1 side of the pipe 51 (for example, a stainless copper pipe etc.), and this pipe 51 The outer peripheral surface 12b of the second metal portion 12 made of a second metal (eg, SUS304, etc.) having good weldability (eg, electron beam welding, etc.) can be joined by welding. Thereby, using the pipe joint 110, a pipe 52 (eg, a copper pipe, an aluminum pipe, etc.) and a pipe 51 (eg, a stainless steel pipe, etc.) of different materials can be joined. can

Further, for example, as shown in Fig. 58, on the X1 side (first end side) of the pipe joint 130 (the third modification of the first structural example), the pipe 52 (for example, a copper pipe; an inner peripheral surface 52a on the X2 side of an aluminum tube or the like) and a first metal (for example, C1020, A5052, etc.) having good brazing bonding properties (for example, phosphor copper brazing, etc.) of this tube 52 The outer peripheral surface 11b of the first metal portion 11 can be joined at the position of the joint portion C52 by brazing. And in the X2 side (second end side) of the pipe joint 130, the outer peripheral surface 53b of the X1 side of the pipe 53 (for example, a stainless copper pipe etc.), and this pipe 53 The inner peripheral surface 12a of the second metal portion 12 made of a second metal (eg, SUS304, etc.) having good weldability (eg, electron beam welding, etc.) can be joined by welding. Thereby, by using the pipe joint 130, a pipe 52 (eg, a copper pipe, an aluminum pipe, etc.) and a pipe 53 (eg, a stainless steel pipe, etc.) of different materials can be joined. can

When pipes of different materials are piped, pipe joints other than the above-described pipe joint 100 , pipe joint 110 , and pipe joint 130 may be used according to the shape of each pipe. Also, for example, the pipe joint 120 (the second modification of the first configuration example) can be used. Further, for example, the pipe joint 200 (second configuration example) further comprising a coated metal portion 13 made of a corrosion-resistant metal (eg, NW2200, NW2201, etc.) and a pipe joint serving as a modified example thereof (210) to the pipe joint 230, the pipe joint 300 (third configuration example) and the pipe joints 310 to 330, which are modified examples thereof, and the pipe joint 400 (fourth configuration example) ) and a pipe joint 410 to a pipe joint 430 that are modified examples thereof can be used. Further, for example, a pipe joint having an intermediate metal portion 14 made of a third metal (eg, NW2200, NW2201, etc.) between the first metal portion 11 and the second metal portion 12 ( 500) (fifth configuration example) and the pipe joints 510 to 560 as modified examples thereof can be used. Further, for example, in addition to the intermediate metal portion 14, the pipe joint 600 (sixth configuration) further comprising a coated metal portion 13 constituted by a corrosion-resistant metal (eg, NW2200, NW2201, etc.) Example) and their modifications are the pipe joint 610 to the pipe joint 660, the pipe joint 700 (the seventh configuration example) and the pipe joints 710 to the pipe joints 760, which are modified examples thereof, and the pipe The joint 800 (the eighth configuration example) and the pipe joints 810 to 860 which are modified examples thereof can be used.

1, 2, 3, 4, 5, 6, 7, 8: Clad plate
11: first metal part (first metal plate, first metal layer)
12: second metal part (second metal plate, second metal layer)
13: coated metal part (coated metal plate, coated metal layer)
14: middle metal part (third metal plate, third metal layer)
50, 51, 52, 53: pipe (joint pipe)
100, 110, 120, 130: pipe joint
200, 210, 220, 230: pipe joint
300, 310, 320, 330: pipe joint
400, 410, 420, 430: pipe joint
500, 510, 520, 530, 540, 550, 560: pipe joint
600, 610, 620, 630, 640, 650, 660: pipe joint
700, 710, 720, 730, 740, 750, 760: pipe joint
800, 810, 820, 830, 840, 850, 860: pipe joint
900: punch
910: die

Claims (16)

A tubular first metal part constituted by a first metal and a tubular second metal part constituted by a second metal different from the first metal,
An axis constituting the tubular shape of the first metal part and an axis constituting the tubular shape of the second metal part are concentric;
a surface along the concentric axial direction of the first metal part and the concentric axial direction of the second metal part between the first end on one side in the concentric axial direction and the second end on the other side A pipe joint in which the following face is metal diffusion bonded along the concentric axial direction. The method of claim 1,
Further comprising at least one of a tubular first coated metal portion made of a corrosion-resistant metal and a tubular second coated metal made of a corrosion-resistant metal,
When the first covering metal part is provided, the axis constituting the tubular shape of the first covering metal part and the axis constituting the tubular shape of the first metal part are concentric;
Between the first end and the second end, a surface along the concentric axial direction of the first covering metal portion and a surface along the concentric axial direction of the first metal portion define the concentric axial direction It is metal diffusion bonded along
In the case where the second covering metal part is provided, an axis forming the tubular shape of the second covering metal part and an axis constituting the tubular shape of the second metal part are concentric, and between the first end portion and the second end portion The pipe joint according to claim 1 , wherein a surface along the concentric axial direction of the second coated metal part and a surface along the concentric axial direction of the second metal part are metal diffusion bonded along the concentric axial direction. The method of claim 1,
Further comprising a tubular intermediate metal portion composed of a third metal different from the first metal and the second metal,
An axis constituting the tubular shape of the first metal part, an axis constituting the tubular shape of the second metal part, and an axis constituting the tubular shape of the intermediate metal part are concentric;
Between the first end and the second end, a surface along the concentric axial direction of the first metal portion and a surface along the concentric axial direction of the intermediate metal portion are metal along the concentric axial direction. A pipe joint that is diffusion bonded, wherein a surface of the second metal portion along the concentric axial direction and a surface of the intermediate metal portion along the concentric axial direction are metal diffusion bonded along the concentric axial direction. 3. The method of claim 2,
Further comprising a tubular intermediate metal portion composed of a third metal different from the first metal and the second metal,
An axis constituting the tubular shape of the first metal part, an axis constituting the tubular shape of the second metal part, and an axis constituting the tubular shape of the intermediate metal part are concentric;
Between the first end and the second end, a surface along the concentric axial direction of the first metal portion and a surface along the concentric axial direction of the intermediate metal portion are metal along the concentric axial direction. A pipe joint that is diffusion bonded, wherein a surface of the second metal portion along the concentric axial direction and a surface of the intermediate metal portion along the concentric axial direction are metal diffusion bonded along the concentric axial direction. 5. The method according to any one of claims 1 to 4,
In the first end, the outer peripheral surface of the first metal part is exposed along the concentric axial direction,
Or, in the second end, the inner peripheral surface of the second metal part is exposed along the concentric axial direction,
Alternatively, in the first end, the outer peripheral surface of the first metal part is exposed along the concentric axial direction, and at the second end, the inner peripheral surface of the second metal part is exposed along the concentric axial direction. with pipe joints. 5. The method according to claim 3 or 4,
In the first end, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction,
Or, in the second end, the inner peripheral surface of the intermediate metal part is exposed along the concentric axial direction,
Alternatively, in the first end, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction, and at the second end, the inner peripheral surface of the intermediate metal part is exposed along the concentric axial direction. seam. 3. The method of claim 1 or 2,
Let L _M1 be the length projected on the concentric axis of the first metal part, and the length projected on the concentric axis of the first junction part to which the first metal part and the second metal part are metal diffusion bonded. Let L _J1 and the minimum inner diameter of the first metal part be D _M1 ,
the first junction satisfies L _J1 /L _M1 ≥0.5, or
or wherein the first joint satisfies L _J1 /L _M1 ≥0.5 and also satisfies L _J1 /L _M1 ≥2. 5. The method according to claim 3 or 4,
Let L _M1 be the length projected on the concentric axis of the first metal part, and the length projected on the concentric axis of the second junction part to which the first metal part and the intermediate metal part are metal diffusion bonded Let L _J2 be the length projected on the concentric axis of the second metal part, let L _M2 be, on the concentric axis of the third junction part to which the second metal part and the intermediate metal part are metal diffusion bonded When the projected length is L _J3 and the minimum inner diameter of the first metal part is D _M1 ,
the second junction satisfies L _J1 /L _M1 ≥0.5 and the third junction satisfies L _J3 /L _M2 ≥0.5;
or, the second junction satisfies L _J2 /L _M1 ≥0.5, and also satisfies L _J2 /L _M1 ≥2, and the third junction satisfies L _J3 /L _M2 ≥0.5, and L Pipe joints meeting _J3 /L _M1 ≥2. A first metal plate made of a first metal and a second metal plate made of a second metal different from the first metal are prepared, and the first metal plate and the second metal plate are rolled in a laminated state in the plate thickness direction, Heat treatment is performed so that metal diffusion occurs between the first metal and the second metal, and a flat plate-shaped first metal layer made of the first metal and a flat plate-shaped second metal layer made of the second metal are formed on the flat plate surface A process of manufacturing a clad plate material that is diffusion bonded to each other along the direction;
Deep drawing of the clad plate material is performed to form a tubular first metal part made of the first metal and a tubular second metal part made of the second metal, wherein the tubular shape of the first metal part is provided. The axis forming the tubular shape and the axis forming the tubular shape of the second metal part are concentric, and between the first end part on one side in the concentric axial direction and the second end part on the other side, the concentric axis of the first metal part manufacturing a tubular member including a tubular portion in which a surface along the axial direction of
and cutting both end portions of the tubular member in the deep drawing forming direction, and cutting the tubular portion from the tubular member. 10. The method of claim 9,
In the process of manufacturing the clad plate material, a first coated metal plate made of a corrosion-resistant metal is further prepared, rolled, and heat-treated, and the flat first coated metal layer and the flat first metal layer made of the corrosion-resistant metal are formed in the flat shape. A clad plate with metal diffusion bonding along the plate direction is produced,
In the step of manufacturing the tubular member, the clad plate is deep-drawn and provided with a tubular first coated metal part made of the corrosion-resistant metal, the shaft forming the tubular shape of the first metal part and the first An axis constituting the tubular shape of the coated metal part is concentric, and between the first end and the second end, a surface along the concentric axial direction of the first metal part and the concentricity of the first coated metal part To manufacture a tubular member comprising a tubular portion whose surface along the axial direction is metal diffusion bonded along the concentric axial direction, or
Alternatively, in the process of manufacturing the clad plate material, a second coated metal plate made of a corrosion-resistant metal is further prepared, rolled, and heat-treated, and the flat second coated metal layer and the flat second metal layer made of the corrosion-resistant metal are A clad plate material with metal diffusion bonding is produced along the plate surface direction on a flat plate,
In the step of manufacturing the tubular member, the clad plate is deep-drawn and provided with a tubular second coated metal part made of the corrosion-resistant metal, the shaft forming the tubular shape of the second metal part and the second The tubular axis of the coated metal portion is concentric, and between the first end and the second end, the concentric surface of the second metal portion along the concentric axial direction and the concentricity of the second coated metal portion A method of manufacturing a pipe joint for producing a tubular member including a tubular part having a surface along the axial direction metal diffusion bonded along the concentric axial direction. 10. The method of claim 9,
In the process of manufacturing the clad plate material, an intermediate metal plate made of a third metal different from the first metal and the second metal is further prepared, rolled, and heat-treated, and the plate-shaped first metal layer and the plate-shaped second metal layer are further prepared. A clad plate material in which a plate-shaped intermediate metal layer composed of the third metal between the metal layers is metal diffusion bonded along the plate-shaped plate surface direction is produced,
In the step of manufacturing the tubular member, the clad plate is deep-drawn and provided with a tubular intermediate metal part made of the third metal, the shaft forming the tubular shape of the first metal part and the second metal The tubular axis of the part and the tubular axis of the intermediate metal part are concentric, and between the first end and the second end, a surface along the concentric axial direction of the first metal part; A surface along the concentric axial direction of the intermediate metal part is metal diffusion bonded along the concentric axial direction, and a surface of the second metal part along the concentric axial direction and the intermediate metal part along the concentric axial direction A method of manufacturing a pipe joint for manufacturing a tubular member including a tubular part whose surface is metal diffusion bonded along the concentric axial direction. 11. The method of claim 10,
In the process of manufacturing the clad plate material, an intermediate metal plate made of a third metal different from the first metal and the second metal is further prepared, rolled, and heat-treated, and the plate-shaped first metal layer and the plate-shaped second metal layer are further prepared. A clad plate material in which a plate-shaped intermediate metal layer composed of the third metal between the metal layers is metal diffusion bonded along the plate-shaped plate surface direction is produced,
In the step of manufacturing the tubular member, the clad plate is deep-drawn and provided with a tubular intermediate metal part made of the third metal, the shaft forming the tubular shape of the first metal part and the second metal The tubular axis of the part and the tubular axis of the intermediate metal part are concentric, and between the first end and the second end, a surface along the concentric axial direction of the first metal part; A surface along the concentric axial direction of the intermediate metal part is metal diffusion bonded along the concentric axial direction, and a surface of the second metal part along the concentric axial direction and the intermediate metal part along the concentric axial direction A method of manufacturing a pipe joint for manufacturing a tubular member including a tubular part whose surface is metal diffusion bonded along the concentric axial direction. 13. The method according to any one of claims 9 to 12,
having a step of exposing an outer peripheral surface of the first metal part along the concentric axial direction at the first end of the tubular part cut off from the tubular member;
or, at the second end of the tubular part cut off from the tubular member, exposing the inner peripheral surface of the second metal part along the concentric axial direction;
or, at the first end of the tubular part cut off from the tubular member, the outer peripheral surface of the first metal part is exposed along the concentric axial direction, and the tubular part cut off from the tubular member and exposing an inner peripheral surface of the second metal part along the concentric axial direction at a second end. 13. The method according to claim 11 or 12,
a step of exposing an outer peripheral surface of the intermediate metal part along the concentric axial direction at the first end of the tubular part cut off from the tubular member;
or, at the second end of the tubular part cut off from the tubular member, exposing the inner peripheral surface of the intermediate metal part along the concentric axial direction;
Alternatively, at the first end of the tubular part cut off from the tubular member, the outer peripheral surface of the intermediate metal part is exposed along the concentric axial direction, and the second end of the tubular part cut off from the tubular member and exposing the inner peripheral surface of the intermediate metal part along the concentric axial direction at two ends. 11. The method according to claim 9 or 10,
Let L _M1 be the length projected on the concentric axis of the first metal portion, and the length projected on the concentric axis of the first junction where the first metal portion and the second metal portion are metal diffusion bonded. Let L _J1 and the minimum inner diameter of the first metal part be D _M1 ,
forming the tubular portion such that the first joint satisfies L _J1 /D _M1 ≥0.5;
Alternatively, the method of manufacturing a pipe joint in which the tubular portion is formed such that the first joint satisfies L _J1 /D _M1 ≥0.5 and also satisfies L _J1 /D _M1 ≥2. 13. The method according to claim 11 or 12,
Let L _M1 be the length projected on the concentric axis of the first metal portion, and the length projected on the concentric axis of the second junction where the first metal portion and the intermediate metal portion are metal diffusion bonded Let L _J2 be, the length projected on the concentric axis of the second metal part is L _M2 , and on the concentric axis of the third junction where the second metal part and the intermediate metal part are metal diffusion bonded. When the projected length is L _J3 and the minimum inner diameter of the first metal part is D _M1 ,
forming the tubular portion such that the second junction satisfies L _J2 /L _M1 ≥0.5 and the third junction satisfies L _J3 /L _M2 ≥0.5;
or wherein the second junction satisfies L _J2 /L _M1 ≥0.5, and also satisfies L _J2 /D _M1 ≥2, and the third junction satisfies L _J3 /L _M2 ≥0.5, and L J3 /L M2 ≥0.5 A method of manufacturing a pipe joint for forming the tubular portion to satisfy _J3 /D _M1 ≥2.

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