JP5242200B2 - Manufacturing method of dissimilar material joined body - Google Patents

Description

  The present invention relates to a method for manufacturing a joined body of different materials. More specifically, a dissimilar material joined body in which the non-joining region and the joining region on the joining surface are intricately complicated, such as a die that requires high formability used in a mold for forming a ceramic honeycomb structure. The present invention relates to a method for producing a dissimilar material joined body capable of obtaining a precise dissimilar material joined body in which a non-joined region and a joined region are intricately arranged on a joining surface with high accuracy.

  Patent Document 1 discloses an Al metal joined body obtained by joining an Al metal member made of aluminum (Al) or a metal containing Al as a main component and a dissimilar member made of a material different from the Al metal member. An Al metal joined body having a soft metal layer having a Hv hardness of 20 to 80 (micro Vickers; load of 100 gf) and a thickness of 0.1 to 3 mm is disclosed at the joining interface between the member and the dissimilar member.

  When manufacturing such a dissimilar material joined body, for example, after laminating two plate-like members made of different materials, the laminated plate-like members are heated while being sandwiched by a pair of pressing dies. A method of joining the two plate-shaped members may be used.

  Conventionally, as a method for manufacturing a ceramic honeycomb structure, a honeycomb including a die base body in which a back hole into which a forming raw material (kneaded material) is introduced and a lattice-like slit communicating with the back hole is formed. A method of extrusion molding using a structure molding die has been widely performed. This die is usually provided with a slit having a width corresponding to the partition wall thickness of the honeycomb structure on one surface of the die base, and a slit on the opposite surface (the other surface). A back hole communicating with the opening is provided with a large area. And this back hole is normally provided corresponding to the position where slits, such as a grid | lattice shape, cross | intersect, and both communicate in the base | substrate base | substrate. Therefore, the forming raw material such as the ceramic raw material introduced from the back hole moves from the back hole having a relatively large inner diameter to the narrow slit, and the honeycomb structure formed body (honeycomb formed body) from the opening of the slit. ).

  As a die base constituting such a honeycomb structure forming die, for example, a plate-like member made of one kind of alloy such as a stainless alloy or a cemented carbide, or a member for forming a slit, for example A plate-like member formed by joining two different types of plate-like members, such as a member for forming a back hole, is used (see, for example, Patent Document 2 or 3).

  In the conventional method for manufacturing a die for forming a honeycomb structure, the above-described slit and back hole are formed on such a die base by machining.

JP-A-10-5992 JP 2000-326318 A JP 2003-285308 A

  However, in a conventional method for manufacturing a die for forming a honeycomb structure as a dissimilar material joined body in which a non-joining region and a joining region are intricately joined on a joining surface, two different kinds of plate-like members are joined to form a die base. When obtaining, there is a case where a brazing material is arranged between the plate-like members and heated to join the two kinds of plate-like members. For example, one plate-like member has a back hole and this back hole in advance. When connecting the plate-like member and another plate-like member to form a groove portion that communicates with the joint surface from the side surface, the brazing material penetrates into the previously formed back hole and groove portion. Intrusion brazing material remains in the back hole and the groove. For this reason, when processing the slit, there is a problem that the brazing material in the back hole and the groove becomes resistance, and tools such as a grindstone for slit processing are damaged, and the formed slit is distorted. It was. Further, when the brazing material remains in the back hole and the groove portion in this way, when the honeycomb structure is formed, the flow path communicating from the back hole and the groove portion to the slit may be blocked by the brazing material. There is also a problem in that it may be narrowed, which adversely affects the quality of the molded product.

  The present invention has been made in view of the above-described problems, and manufacture of a dissimilar material joined body capable of obtaining with high accuracy a dissimilar material joined body in which a non-joining region and a joining region on a joining surface are complicated. Provide a method.

  That is, according to the present invention, the following method for producing a joined body of different materials is provided.

[1] A plate-like member laminate is obtained by laminating with a brazing material disposed on a joint surface between two plate-like members made of different materials, and the plate-like member laminate is heated, whereby the two A dissimilar material joined body manufacturing method for manufacturing a dissimilar material joined body in which two plate-like members are joined, wherein one plate-like member of the two plate-like members has a plurality of side surfaces along the joining surface. A groove portion is provided, and a plurality of openings that are open while communicating with the groove portion on the side surface, a non-joint region formed by the groove portion on the joint surface, and a non-joint region, A plurality of joining regions for joining the two plate-like members, and is close to the opening in a state where the plate-like member laminate is sandwiched by a pair of pressing molds via a sheet-like release material. A sheet-like edge portion of the release material was provided in the mold. While it fixed so as not to cause warpage in the edge portion with a constant section, together with the brazing material is heated above a temperature to melt, and the pressure was reduced in the heating atmosphere to a pressure lower than the vapor pressure of the brazing material, The manufacturing method of the dissimilar-materials joined body which discharge | emits the said brazing | wax material excess in the gap | interval of the said non-joining area | region as vapor | steam from the said opening part.

  [2] The dissimilar material according to [1], wherein a sheet-like material made of at least one selected from the group consisting of silicon, carbon, aluminum nitride, aluminum oxide, and silicon carbide is used as the release material. Manufacturing method of joined body.

  [3] The dissimilar material joined body according to [1] or [2], wherein a brazing material of metal or alloy containing at least one selected from the group consisting of copper, silver, and aluminum is used as the brazing material. Production method.

  [4] The method for producing a dissimilar material joined body according to any one of [1] to [3], wherein the plate-shaped member laminate is sandwiched between the pressing dies by applying a pressure of 0.1 to 100 MPa.

  [5] A metal or alloy capable of causing at least one phase transformation selected from the group consisting of martensitic transformation, bainite transformation, and pearlite transformation by cooling the austenite phase as one of the two plate-like members. The manufacturing method of the dissimilar-materials joined body in any one of said [1]-[4] using the thing comprised from these.

  [6] Manufacture of a dissimilar material joined body according to any one of [1] to [5], wherein the other plate-shaped member of the two plate-shaped members is made of a tungsten carbide-based cemented carbide. Method.

  [7] The method for manufacturing a joined body of different materials according to any one of [1] to [6], wherein the width of the groove is 50 to 1000 μm.

[8] The manufacturing method of the dissimilar material joined body according to any one of [1] to [7], wherein a minimum value of an area of the joining region is 0.1 to 100 mm ² .

  [9] A back hole for introducing a forming raw material is formed in one plate-like member constituting the dissimilar material joined body so as to communicate with the groove portion, and the other plate constituting the dissimilar material joined body The slit for forming the forming raw material in a lattice shape is formed in the shaped member so as to communicate with the groove, and the die for forming the honeycomb structure is manufactured as the dissimilar material joined body [1] The manufacturing method of the dissimilar-material joined body in any one of-[8].

  The manufacturing method of the dissimilar material joined body according to the present invention includes a dissimilar material joined body in which a non-joining region and a joining region on a joining surface obtained by joining two plate-like members are complicated, for example, a ceramic honeycomb structure molding gold A method of manufacturing a dissimilar material joined body such as a die used for a die, and if the die obtained by this dissimilar material joined body manufacturing method is used as a die for a ceramic honeycomb structure, a high formability is realized. It is possible.

  In particular, according to the method for manufacturing a dissimilar material joined body of the present invention, when producing a dissimilar material joined body having a joining surface in which a non-joining region and a joining region are intricately interlaced, the vapor of the brazing material is generated using the non-joining region as a flow path. It is possible to prevent the brazing material vapor from remaining by securing an opening for discharge. That is, by pressing the edge of the release material with the fixing part provided in the pressing part so that the sheet-like release material arranged near the opening does not warp by heat or pressure and block the opening. Secure the opening to discharge the brazing material vapor and prevent the brazing material vapor from remaining. For this reason, it is possible to obtain a joined body of dissimilar materials such as a die used in a mold for forming a ceramic honeycomb structure having a large diameter and a high cell density with very high accuracy.

  Hereinafter, with reference to the drawings, an embodiment of a method for producing a dissimilar material joined body of the present invention will be described in detail. However, the present invention is not construed as being limited thereto, and the scope of the present invention is not limited thereto. Various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope.

  FIG. 1 is a cross-sectional view schematically showing a process of manufacturing a plate-shaped member laminate in the method for manufacturing a dissimilar material assembly according to the present embodiment. FIG. 2 is a cross-sectional view of the dissimilar material assembly according to the present embodiment. It is sectional drawing which shows typically the dissimilar-material joined body obtained by the manufacturing method. Further, FIG. 3 is a cross-sectional view schematically showing a dissimilar material joined body manufactured as a die for forming a honeycomb structure in the method for manufacturing a dissimilar material joined body of the present embodiment. Moreover, FIG. 4 is explanatory drawing which shows typically the process heated in the state clamped between the pressing dies in the manufacturing method of the dissimilar-materials joined body of this Embodiment. FIG. 5 is an explanatory view schematically showing a process of heating the plate-shaped member laminate in a heat insulating container in a vacuum container while being sandwiched between pressing dies in the method for manufacturing a dissimilar material joined body according to the present embodiment. It is.

  In addition, in FIGS. 1-3, it is sectional drawing which looked at the plate-shaped member laminated body or the dissimilar-materials joined body from the side. 4 and 5 are schematic explanatory views of the plate-like member laminate or the dissimilar material joined body as viewed from the side. 9 and 10 are a schematic X-X 'sectional view and a schematic Y-Y' sectional view shown in FIG. 2, respectively. FIG. 11 shows a schematic Z-Z ′ cross-sectional view in FIG. 3.

  In the manufacturing method of the dissimilar material joined body according to the present embodiment, as shown in FIG. 1, lamination is performed in a state where a brazing material 27 is arranged on a joining surface 28 between two plate-like members 2 and 3 made of different materials. As shown in FIG. 5, the plate-like member laminate 4 is heated by, for example, the radiant heat 10 of the heater 7 to join the two plate-like members 2 and 3. This is a manufacturing method of a dissimilar material joined body for producing the dissimilar material joined body 1.

  Further, in the manufacturing method of the dissimilar material joined body of the present embodiment, as shown in FIG. 1, a plurality of groove portions along one of the two plate-like members 2 and 3 from the side surface along the joining surface 28. 37 is provided on the side surface, and a plurality of openings 11 opened while communicating with the groove portion 37 as shown in FIG. 4, and a non-joint formed by the groove portion 37 shown in FIG. A region 31 and a plurality of joining regions 32 that are partitioned by the non-joining region 31 and join the two plate-like members 2 and 3 are formed.

  Furthermore, in the manufacturing method of the dissimilar material joined body according to the present embodiment, the plate-like member laminate 4 is held between the pair of pressing dies 5 as shown in FIG. While fixing the sheet-like edge portion of the release material 8 close to the portion 11 to the fixing portion 6 provided in the mold 5, the heating material is heated to a temperature higher than the temperature at which the brazing material 27 melts, and the pressure of the heating atmosphere is reduced. The pressure is reduced to a pressure lower than the vapor pressure, and the surplus brazing material 27 in the non-joining region 31 is discharged as vapor from the opening 11. In the opening 11, as shown by the arrow in FIG. 10, the steam of the brazing material also plays a role of discharging to the outside.

  When the plate-like member laminate 4 is heated while being sandwiched between the pair of pressing dies 5, the pressure of the heating atmosphere is reduced to a pressure lower than the vapor pressure of the brazing material 27 as shown in FIG. It can be heated by a heater 7 or the like disposed around the pressing die 5 sandwiching the plate-like member laminate 4 in the heat insulating container 16 inside the vacuum container 19 capable of.

  Further, since the stamping die 5 is used in the heating step, the melting point of the stamping die 5 is 500 ° C. or higher, and the bonding temperature of the plate-like members 2 and 3 constituting the plate-like member laminate 4 is 1.5. It is preferable to use a material made of a material having a melting point more than double. By using such a die 5, it is possible to sufficiently pressurize the plate-like member laminate 4 of the die 5, and after manufacturing the dissimilar material joined body, the die 5 can be easily removed, Can be used repeatedly. Furthermore, the thermal deformation of the pressing die 5 in the heating step can be mitigated.

  In addition, the said joining temperature is the temperature heated for joining, Specifically, it is the highest temperature reached | attained when it heats.

  In addition, although it does not specifically limit, As for melting | fusing point of the die 5, it is still more preferable that it is 1000 degreeC or more, and it is more preferable that it is 1500 degreeC or more. By using such a material, the plate-shaped member laminate can be firmly held in the heating step. Further, it is more preferable that the stamping die 5 has a temperature that is twice or more the above-described bonding temperature.

As a specific material that constitutes the die 5, heat that is 1.5 times or more the heat transfer coefficient (W / m ² · K) of at least one of the plate-like members 2 and 3 that constitute the plate-like member laminate 4. There is no particular limitation as long as it is a material having a transmission rate (W / m ² · K). For example, silver, copper, gold, aluminum, magnesium, brass, tungsten, beryllium, iridium, molybdenum, silicon, carbon, aluminum nitride A material containing at least one selected from the group consisting of silicon carbide and silicon carbide can be given as a preferred example.

  Of the above-mentioned materials, tungsten, molybdenum, carbon, aluminum nitride, etc. can be used more suitably. In addition, since the material is cheaper and has good workability, carbon is particularly preferred. It can be used suitably.

Note that the above-mentioned carbon, for example, isotropic graphite carbon, has a large heat transfer coefficient depending on its density. Therefore, when carbon is used as a material for the die in the manufacturing method of the dissimilar material joined body of the present embodiment. , preferably it has a density of 1.5 Mg / ^{m 3} or more, more preferably 1.7 Mg / ^{m 3} or more.

  Carbon with such a density has high heat transfer properties compared to the materials used in conventional stamping molds and has an extremely high melting point. Therefore, dissimilar materials can be joined using plate members made of various materials. It can be used in a body manufacturing method.

  The pressing die 5 configured as described above has extremely good heat transfer, and can be quickly heated by the radiant heat 10 such as the heater 7 in the heat insulating container 16 as shown in FIG.

  Further, when the plate-shaped member laminate 4 is sandwiched between the pair of molds 5, as shown in FIG. 4, a sheet-shaped release material 8 is previously provided between the pair of molds 5 and the plate-shaped member laminate 4. In such a state that the plate-shaped member laminate 4 is sandwiched and heat can be evenly transmitted from the sandwiching surface 15 of the die 5 to the plate-shaped member laminate 4, the plate 5 and the plate-shaped member laminate. It is preferable not to create a gap between the four.

  By comprising in this way, fusion | bonding with the plate-shaped member laminated body 4 (or the dissimilar-material joined body 1 obtained (refer FIG. 2)) and the clamping surface 15 of the die 5 can be prevented effectively. At the same time, the adhesion between the plate-like member laminate 4 and the pressing die 5 can be improved.

  Note that it is preferable that the elastic modulus of the sheet-like release material 8 is sufficiently small. The specific elastic modulus is preferably 100 GPa or less, and more preferably 10 GPa or less. By comprising in this way, the clearance gap between a stamping die and a plate-shaped member can be filled, adhesion can be improved and heat transfer can be improved, and surface pressure distribution can be made uniform.

  The material of the release material 8 is not particularly limited, but is preferably made of a material having excellent heat transfer, for example, from the group consisting of silicon, carbon, aluminum nitride, aluminum oxide, and silicon carbide. A sheet-like material made of at least one selected material can be suitably used. In addition, it is preferable that the thickness of the sheet-like release material 8 is sufficiently thin. Specifically, the thickness is preferably 1 mm or less, and more preferably 0.2 mm or less.

  Usually, the plate-like member laminate and the sheet-like release material 8 often differ greatly in thermal expansion coefficient. In general, the plate-like member laminate has a larger coefficient of thermal expansion, and there is a risk of misalignment during temperature rise due to the difference in thermal expansion. For this reason, it is difficult to cut and use the size of the sheet-like release material 8 in advance so as to match the size of the plate-like member laminate. At least, if the size of the sheet-like release material is not cut and used to be about 5 mm larger than the size of the plate-like member laminate, the plate-like member laminate will protrude beyond the release material, May not play a role.

  By using such a release material 8, it is possible to further improve the adhesion between the plate-like member laminate 4 and the pressing die 5, and the heat from the clamping surface 15 of the die 5 is transferred to the plate-like member laminate 4. It becomes possible to transmit more evenly to the surface.

  Further, in the method for manufacturing a dissimilar material joined body according to the present embodiment, when the plate-shaped member laminate 4 is sandwiched by the stamping die 5, it varies depending on the type and structure of the laminated plate-shaped members 2 and 3, for example, It is preferable to sandwich the mold 5 by applying a pressure of 0.1 to 100 MPa. By comprising in this way, the curvature which arises after joining the two plate-shaped members 2 and 3 can be correct | amended, and the dissimilar-material joined body 1 (refer FIG. 2) without a distortion can be obtained.

  In addition, as shown in FIG. 1, the two plate-like members 2 and 3 constituting the plate-like member laminate 4 are not particularly limited in the material of the two plate-like members 2 and 3. As one plate-like member (for example, plate-like member 2) of the plate-like members 2 and 3, at least one phase transformation selected from the group consisting of martensitic transformation, bainite transformation, and pearlite transformation by cooling of the austenite phase is performed. Those made of a metal or an alloy that can be raised can be used.

  Further, when one of the two plate-like members 2 and 3 is made of the above-described metal or alloy, the other plate-like member 3 is made of tungsten carbide based carbide. What was comprised from the alloy can be used conveniently.

  By using such two plate-like members 2 and 3, for example, a dissimilar material joined body 1 that requires excellent wear resistance only in a part thereof, such as a die used for extrusion molding or the like (see FIG. 2) can be produced.

  Further, in the manufacturing method of the dissimilar material joined body of the present embodiment, when the two plate-like members 2 and 3 made of different materials are laminated to obtain the plate-like member laminated body 4, as shown in FIG. Then, lamination is performed in a state where the brazing material 27 is arranged between the two plate-like members 2, 3, thereby obtaining the plate-like member laminate 4 in which the brazing material 27 is arranged between the two plate-like members 2, 3. By comprising in this way, joining of the two plate-shaped members 2 and 3 becomes easy, and the joining strength in the joining surface 28 of the two plate-like members 2 and 3 improves.

  Although not particularly limited, the brazing material 27 is preferably made of a material that can penetrate into at least one of the two plate-like members 2 and 3. By using the brazing material 27 made of such a material, the brazing material 27 does not exist in the state of the layer of the plate-shaped member laminate on the joining surface of the two plate-shaped members 2, 3. A decrease in strength can be effectively prevented.

  As a brazing material 27 used in the manufacturing method of the dissimilar material joined body of the present embodiment, a brazing material containing at least one selected from the group consisting of copper, silver, gold, nickel, and aluminum is given as a preferred example. Can do.

  Moreover, in the manufacturing method of the dissimilar-material joined body of this Embodiment, for example, while forming the back hole 26 for introducing a forming raw material into one plate-like member 2 constituting the dissimilar-material joined body, As shown in FIG. 12, the other plate-like member 3 constituting the material joined body is formed with slits for forming a forming raw material in a lattice shape as shown in FIG. A base 21 for molding the structure can also be manufactured. 13 is a cross-sectional view taken along a plane α in FIG. The molding material introduced from the adjacent back hole 26 joins at the groove 37, the flow rate is adjusted, and the other plate-like member 3 joined by the brazing material 27 on the joining surface 28 is slit at a position corresponding to the groove 37. 25 is provided. A desired honeycomb-shaped formed body can be formed from the slit.

9 and 10 are a schematic XX ′ sectional view and a schematic YY ′ sectional view shown in FIG. 2, respectively. As shown in FIG. 9, the regularly arranged back holes 26 serve as introduction holes for the molding material, and the adjacent back holes communicate with each other in the groove portion 37 to equalize the flow rate of the molding material. Further, in the joining surface 28 as shown in FIG. 10, an opening portion 11 is provided by forming a groove portion 37 over the entire circumference of the outer periphery, which is the side surface of the dissimilar material joined body, and during heating through this opening portion 11 The material vapor is discharged as shown by the arrows in the figure. According to the manufacturing method of the dissimilar material joined body of the present embodiment, it is preferable that the minimum value of the area of the joining region 32 is 0.1 to 100 mm ² on the joining surface 28 as shown in FIG. According to the manufacturing method of the bonded body of different members of the present embodiment, the minimum value of the area of the bonding region 32 is higher a complicated shape as shown in FIG. 10 in a range of 0.1 to 100 mm ² It is possible to join different materials with sufficient strength with accuracy.

  In the conventional method for manufacturing a dissimilar material joined body, the opening 11 is formed in a sheet as shown in the schematic cross-sectional view of the dissimilar material laminate 4 shown in FIG. 7 is provided directly between the pressing mold 5 having the upper carbon plate 17 and the lower carbon plate 18 and the dissimilar material laminate 4, so that the dissimilar material laminate 4 of FIG. During heating, the edge of the release material 8 is warped and the opening 11 provided on the side surface is covered.

  For this reason, in the manufacturing method of the dissimilar material joined body of the present embodiment, as shown in FIG. 8, in order to prevent the edge of the release material 8 from being warped during heating in the step of heating the dissimilar material laminate 4. The fixing part 6 is provided in the pressing die 5 provided with the lower carbon plate 18, and the edge of the release material 8 is fixed by the fixing part 6. At this time, since the groove portion 37 provided along the joint surface 28 communicates with the opening portion 11, the vapor of the brazing material 27 is discharged from the opening portion 11. However, the fixing portion 6 provided in the pair of pressing dies 5 may be one on the side closer to the opening 11, and when the opening is close to the pressing die 5 including the upper carbon plate 17, the upper carbon plate 17 A fixing portion is provided, and an edge portion of a release material (not shown) provided between the carbon plate 17 and the dissimilar material laminate 4 is fixed.

  The fixing portion 6 may be anything that prevents the edge of the sheet-like release material 8 from being covered with the opening 11, and a groove shape is provided in the holding surface 15 of the pressing die 5, and the edge is formed inside the groove shape. It is also possible to accommodate the portion to be the fixed portion 6. The shape and structure of the fixed portion 6 are not particularly limited. As an example of the fixing portion 6, as shown in FIG. 8, a groove-like gap provided at a position where the distance from the edge portion of the plate-like member laminate 4 is 0 to 100 mm is formed on the surface of the lower carbon plate 18 (the die 5). It is preferable that the sheet-shaped release material 8 is bent and fixed in a groove-like gap as the fixing portion 6, and this distance is more preferably 5 to 50 mm.

  As shown in FIG. 10, the non-bonding regions 38 and 39 corresponding to the back hole 26 and the groove 37 communicate with the opening 11 on the bonding surface 28. A plurality of precise and complicated joint regions 32 defined by the grooves 37 are joined with sufficient strength by the penetration of the brazing material. A slit 25 provided in the other plate-like member 3 joined at a plurality of joining regions 32 on the joining surface 28 is shown in FIG. 11 as a Z-Z ′ sectional view in FIG. 3. The slit 25 is provided at a position corresponding to the groove portion 37, and can be used as the molding die 21 by adjusting the width of the slit 25 to a desired width according to the purpose of molding.

  In the conventional method for manufacturing a die for forming a honeycomb structure, when one plate-like member 2 and the other plate-like member 3 are heated to a temperature equal to or higher than the melting temperature of the brazing material (for example, pure copper), they are joined. Is that the brazing filler metal (pure copper) is melted and the pressure of the heating atmosphere is reduced to a pressure lower than the vapor pressure of the brazing filler metal 27 to vaporize and remove the brazing filler metal 27 entering the back hole 26 at the time of joining. However, a part of the brazing material 27 enters the back hole 26 and the groove 37 formed in one plate-like member, and remains in the back hole 26 and the groove 37.

  When the brazing material 27 remains in the back hole 26 and the groove portion 37, when the slit 25 (see FIG. 3) is formed so as to penetrate the other plate-like member 3, the brazing material 27 becomes a resistance, and the formed slit 25 (see FIG. 6) may be distorted, or a tool such as a grindstone for forming the slit 25 (see FIG. 6) may be damaged. Further, if the brazing material 27 remains in the back hole 26, the flow path from the back hole 26 to the slit 25 of the honeycomb structure forming die 1 is blocked or narrowed, which adversely affects the quality of the molded product. There was also a problem of giving. In addition, as the diameter of honeycomb structures has increased in recent years and the density of thin walls has increased, both the bonding area and non-bonding area of the bonding surface have become denser, and the required accuracy has increased, and the brazing material vapor has been bonded. When it remained without being sufficiently discharged from this non-bonded area inside the surface, the effect could not be ignored even with a small amount.

  In the method for manufacturing a die for forming a honeycomb structure of the present embodiment, the brazing material (copper) is melted and the pressure of the heating atmosphere is reduced to a pressure lower than the vapor pressure of the brazing material 27, and the groove 37 The opening 11 communicated is provided on the side surface, and the edge of the release material 8 is fixed by the fixing portion 6 provided in the pressing die 5 so that the opening 11 is not blocked. It is possible to vaporize the brazing material 27 penetrating the glass and remove it from the opening 11. For this reason, when the slit 25 is formed in the other plate-like member 3 constituting a part of the base base 22, the brazing material 27 that has entered the back hole 26 does not become a resistance, and there is no distortion or the like. 25 can be accurately and easily formed. In addition, a higher quality product can be obtained.

  Such a base 21 includes a plate-like member 2 in which a back hole 26 for introducing a forming raw material is formed, and a plate-like member 3 in which slits 25 for forming the forming raw material in a lattice shape are formed. This is a base 21 made of a joined body 1 of dissimilar materials. FIG. 11 shows a Z-Z ′ cross section of the base 21 in FIG. 3. As shown in FIG. 11, slits 25 are formed in the base 21 in a lattice shape, and by forming such slits 25, fluid flow paths partitioned by the porous partition wall 13 as shown in FIG. 22 are formed. The honeycomb structure 12 having a plurality of cells 14 can be used for extrusion molding.

  Note that the honeycomb structure 12 as shown in FIG. 22 includes a catalyst carrier that uses a catalytic action such as an internal combustion engine, a boiler, a chemical reaction device, and a fuel cell reformer, a particulate collection filter in exhaust gas, and the like. Can be suitably used.

  When manufacturing the base 21 as shown in FIG. 8, for example, first, as shown in FIG. 1, a back hole 26 is formed in one of the two plate-like members 2 and 3. The plate-like member 2 formed with the back hole 26 and the other plate-like member 3 are laminated to obtain the plate-like member laminate 4.

  The above-described back hole 26 can be formed by a conventionally known method such as electrolytic machining (ECM machining), electric discharge machining (EDM machining), laser machining, machining such as drilling, and the like.

  The size of the opening diameter of the back hole 26 can be appropriately determined depending on the size of the honeycomb structure forming die 1 to be manufactured, the shape of the honeycomb structure 12 to be extruded (see FIG. 22), etc. The opening diameter of the back hole 26 is preferably 10 to 0.1 mm, and more preferably 3 to 0.5 mm. A method for forming such a back hole 26 is not particularly limited. For example, a conventionally known method such as electrolytic machining (ECM machining), electric discharge machining (EDM machining), laser machining, machining such as a drill is suitable. Can be used. However, this back hole may be provided in advance as one plate-like member 2 as described above, or may be provided after the dissimilar material joined body 1 is formed.

  Further, in the manufacturing method of the honeycomb structure forming die of the present embodiment, as shown in FIG. 1, before forming the back hole 26 in one plate-like member or after forming the back hole 26, A grid-like groove portion 37 corresponding to the shape of the slit is formed on one surface of the plate-like member. Since this lattice-shaped groove portion 37 functions as a buffer portion for the molding material introduced from the back hole 26, the obtained honeycomb structure forming die moves the forming raw material introduced from the back hole smoothly without any trouble. In addition to realizing high formability, the honeycomb structure can be formed with high accuracy.

  In addition, by forming such a lattice-like groove portion 37 along the joint surface, when the slit is formed by grinding or the like on the other plate-like member constituting a part of the die base, the lattice-like groove portion 37 is formed. It is possible to stop the formation of the slit when it is communicated to the groove portion 37, and there is no need to process one plate-like member excessively. For this reason, deterioration of the grindstone etc. used for a process can be prevented effectively. Furthermore, since the back hole and the groove are formed in advance in this way, the thermal stress due to the difference in thermal expansion coefficient is reduced, so when one plate-like member and the other plate-like member are joined, Peeling on the surface 28 can be reduced.

  As a method for forming such a lattice-shaped groove portion 37, for example, a conventionally known method such as grinding with a diamond grindstone or electric discharge machining (EDM machining) can be suitably used. The depth of the groove 37 is preferably 0.1 to 3.0 mm and the width is preferably 0.1 to 1.0 mm.

  Next, as shown in FIG. 5, the obtained plate-shaped member laminate 4 is formed into a stamping die 5 (upper carbon plate 17, lower carbon plate) made of a material mainly composed of carbon inside the heat insulating container 16 of the vacuum container 19. 18) is heated in a state of being sandwiched between them, the brazing material (copper) is melted, the pressure of the heating atmosphere is reduced to a pressure lower than the vapor pressure of the brazing material 27, and the opening portion communicated with the groove portion 37 11 is provided on the side surface, and the edge portion of the release material 8 is fixed by the fixing portion 6 provided in the pressing die 5 so that the opening portion 11 is not blocked, so that it will enter the back hole 26 and the groove portion 37 at the time of joining. The material 27 can be vaporized and removed from the opening 11. The two plate-like members 2 and 3 constituting the plate-like member stack 4 are joined.

  Next, as shown in FIG. 3, slits 25 for forming a forming raw material in a lattice shape are formed in the other plate-like member 3, and a die 21 (dissimilar material joined body 1 for forming a honeycomb structure) is formed. ).

  The slit 25 described above can be formed by a conventionally known method such as grinding with a diamond grindstone or electric discharge machining (EDM machining).

  In particular, when manufacturing such a die 21, as one plate-like member 2, at least one phase transformation selected from the group consisting of martensitic transformation, bainite transformation, and pearlite transformation by cooling of the austenite phase is performed. A base 21 having excellent wear resistance is manufactured by using a metal or an alloy that can be raised, and further using a tungsten carbide-based cemented carbide as the other plate-like member 3. be able to.

  The manufacturing method of the dissimilar material joined body of the present invention is a manufacturing method for manufacturing a dissimilar material joined body in which two plate members made of different materials are joined. It can also be suitably used as a manufacturing method for manufacturing a plate member assembly by bonding two plate members. When manufacturing such a plate-shaped member assembly made of the same material, the heterogeneous material bonding described so far is performed except that two plate-shaped members made of the same type of material are used. A plate-shaped member joined body can be produced by the same method as the body producing method.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to a following example.

(Example)
A grid-like groove corresponding to the shape of the slit is formed by grinding with a boron nitride grindstone on the back hole for introducing the forming raw material into one plate-like member and the surface to be the joining surface of one plate-like member. Then, a brazing material is arranged on this joining surface, and one plate-like member and the other plate-like member are laminated to obtain a plate-like member laminate. Next, this plate-shaped member laminate is heated in a vacuum vessel while being held by a mold through a release material to obtain a base, and the other plate-shaped member constituting a part of the obtained base is formed. A honeycomb structure forming die was manufactured by forming a slit communicating with the groove of one plate-like member.

  In an Example, SUS630 (C; 0.07 or less, Si; 1.00 or less, Mn; 1.00 or less, P; 0.040 or less, S; 0.030 or less, Ni; 3.00-5. 00, Cr; 15.50 to 17.50, Cu; 3.00 to 5.00, Nb + Ta; 0.15 to 0.45, Fe; balance (unit: mass%)) A die for forming a honeycomb structure was manufactured using the member, the other plate-like member made of a tungsten carbide-based cemented carbide of WC-16 mass% Co, and the brazing material made of copper.

  One plate-like member has a circular shape with a diameter of 215 mm and a thickness of 15 mm, and the other plate-like member has a square with a surface size of 210 mm in diameter and a thickness of 2.5 mm. The brazing material has a circular surface with a diameter of 210 mm and a thickness of 0.010 mm. The sheet-like release material has a square size of 220 mm × 220 mm and a thickness of 0.2 mm.

  First, a back hole having an opening diameter of 1.14 mm was formed in one plate-like member by electrolytic machining (ECM machining) at a position corresponding to the intersection of lattice-shaped slits to be formed in a later step. Further, the back surface and the side surface are formed by providing a grid-like groove portion at a position corresponding to the slit on the surface to be a joint surface with the same width of 0.3 mm in both the vertical and horizontal directions, a depth of 0.5 mm and an interval of 0.8 mm. The opening was communicated with.

  Next, one plate-like member and the other plate-like member are laminated with a brazing material interposed therebetween, and sandwiched by a pair of molds through the mold release material, and the mold release material is provided by a fixing portion provided in the mold. The edges were fixed so as not to block the opening. Next, the brazing filler metal (copper) was melted and heated and reduced to a pressure lower than the vapor pressure of the brazing filler metal to join one plate member and the other plate member to obtain a die base. Specific heating conditions were a heating temperature of 1120 ° C. and a pressure of 0.133 Pa or less.

  After the obtained base die was cooled to room temperature, a slit communicating with the back hole of one plate-like member was formed in the other plate-like member to obtain a honeycomb structure forming die. The slits were formed in a square lattice shape with a diamond grindstone. The slit width was about 100 μm, the depth was about 2.5 mm, and the spacing between adjacent slits was about 1000 μm.

  In the manufacturing method of the honeycomb structure forming die of the present embodiment, the opening is not covered with the release material, so that the brazing material that has entered the back hole is vaporized during heating and removed through the opening. It was. For this reason, when forming a slit in the other plate-shaped member, the brazing material did not become a resistance, and a slit without distortion could be formed accurately and simply. Further, since the obtained die for forming a honeycomb structure has no brazing material remaining in the back hole and the slit width is uniformly formed, a high-quality honeycomb structure can be formed. I was able to. Furthermore, since the lattice-shaped groove portion serves as a buffer portion in the obtained honeycomb structure forming die, the forming raw material introduced from the back hole can be smoothly moved without hindrance, and high formability is realized. The honeycomb structure could be formed with high accuracy.

  In addition, confirmation about the removal of the brazing | wax material which penetrate | invaded in the back hole and groove part of one plate-shaped member was performed by the ultrasonic flaw inspection. FIG. 14 shows an analysis result of the example. FIG. 16 shows a region A ′ in FIG.

(Comparative example)
In the heating process using the same material as in the example, the honeycomb structure was formed in the same manner as in the example except that the edge of the release material was heated without being fixed by the fixing part and bonded to obtain the die base. A body molding die was manufactured.

  In the manufacturing method of the honeycomb structure forming die of this comparative example, since the brazing material remained in the back hole and the groove of one plate-like member after the heating, the resistance during the slit processing was large and uniform. Could not be formed. Further, in the obtained honeycomb structure forming die, there are portions where the flow path communicating from the back hole to the slit is blocked by the brazing material, which may cause defects in the formed product. The confirmation of the removal of the brazing material that entered the back hole and groove of one plate-like member was performed by ultrasonic flaw detection as in the example. FIG. 15 shows the analysis result of the comparative example. FIG. 17 shows a region A in FIG.

  The analysis results comparing the region B, the region C, and the region D in the region A of the comparative example at the positions corresponding to the region B ′, the region C ′, and the region D ′ in the region A ′ of the example are respectively used as comparative photographs. 19, FIG. 20, and FIG. In each figure, the joining area is black and the non-joining area is gray. In the example, it was shown that the non-bonded region was not blocked by the brazing material, and in the comparative example, the non-bonded region was blocked by the brazing material (black portion of each comparative photograph).

  The method for producing a dissimilar material joined body according to the present invention is a method for producing a dissimilar material joined body in which two plate-like members made of different materials are joined, particularly a die used for a die for forming a ceramic honeycomb structure. As described above, a dissimilar material joined body that requires excellent wear resistance at only a part thereof and can obtain a precise dissimilar material joined body in which the non-joining region and the joining region on the joining surface are intricately complicated can be obtained with high accuracy. It can use suitably as a manufacturing method.

It is explanatory drawing which shows typically the process of manufacturing the plate-shaped member laminated body in one embodiment of the manufacturing method of the dissimilar-materials joined body of this invention, and is the typical which looked at the plate-shaped member laminated body from the side. It is sectional drawing. It is the typical sectional view which looked at the dissimilar material zygote obtained by one embodiment of the manufacturing method of the dissimilar material zygote of the present invention from the side. It is explanatory drawing which shows typically the process of forming a slit in the other plate-shaped member in the other example of one embodiment of the manufacturing method of the dissimilar-materials joined body of this invention, The surface of a plate-shaped member laminated body FIG. It is typical explanatory drawing which shows typically the state which clamps the plate-shaped member laminated body with a pressing die in one Embodiment of the manufacturing method of the dissimilar-materials joined body of this invention. FIG. 5 is a schematic explanatory view schematically showing a step of heating a plate-like member laminate in a vacuum vessel in a state of being sandwiched between pressing dies in one embodiment of a method for producing a dissimilar material joined body according to the present invention. . It is explanatory drawing which shows the state of the mold release material before heating in one embodiment of the manufacturing method of the conventional different-material joined body, and is the side view which looked at the plate-shaped member laminated body from the side. It is explanatory drawing which shows the state of the mold release material at the time of heating in one embodiment of the manufacturing method of the conventional different-material joined body, and is the side view which looked at the plate-shaped member laminated body from the side. It is explanatory drawing which shows the state of the mold release material before heating at the time of one Embodiment of the manufacturing method of the dissimilar-material joined body of this invention, and is the side view which looked at the plate-shaped member laminated body from the side. . FIG. 3 is a cross-sectional view taken along the line X-X ′ in FIG. 2 of the dissimilar material joined body obtained by one embodiment of the method for producing a dissimilar material joined body of the present invention. FIG. 3 is a cross-sectional view taken along the line Y-Y ′ in FIG. 2, showing a joint surface of the dissimilar material joined body obtained by one embodiment of the manufacturing method of the dissimilar material joined body of the present invention. FIG. 4 is an explanatory view schematically showing a step of forming a slit in the other plate-shaped member in one embodiment of the method for producing a dissimilar material joined body of the present invention, and is a cross-sectional view taken along the line ZZ ′ in FIG. 3. is there. FIG. 3 is a perspective view schematically showing a die for forming a honeycomb structure. FIG. 13 is a schematic cross-sectional view showing a cross section of the honeycomb structure forming die shown in FIG. 12 cut along a plane α. It is an analysis photograph of the ultrasonic flaw inspection which shows the quality of joining of the joint surface of the die | base for shape | molding the honeycomb structure in an Example. It is an analysis photograph of the ultrasonic flaw inspection which shows the joining quality of the joint surface of the die | die for shape | molding the honeycomb structure in a comparative example. FIG. 15 is a partially enlarged photograph showing a region A ′ of the example in FIG. 14. It is a partially expanded photograph which shows the area | region A of the comparative example in FIG. 4 is a partially enlarged comparative photograph comparing a region D ′ and a region D. 4 is a partially enlarged comparative photograph comparing a region B ′ and a region B. 4 is a partially enlarged comparative photograph comparing a region C ′ and a region C. It is typical explanatory drawing which shows typically the state which clamps the plate-shaped member laminated body with a pressing die in one embodiment of the manufacturing method of the conventional different-material joined body. It is a perspective view which shows the honeycomb structure extruded by the nozzle | cap | die shown in FIG.

Explanation of symbols

1: heterogeneous material joined body, 2: plate-like member (one plate-like member), 3: plate-like member (the other plate-like member), 4: plate-like member laminate, 5: pressing die, 6: fixing part, 7: heater, 8: release material, 10: radiant heat, 11: opening, 12: honeycomb structure, 13: partition walls, 14: cell, 15: clamping surface, 16: heat insulating container, 17: upper carbon plate, 18: Lower carbon plate, 19: vacuum vessel, 21: base, 25: slit, 26: back hole, 27: brazing material, 28: bonding surface, 31: non-bonding region, 32: bonding region, 37: groove, 38: non Bonding region, 39: non-bonding region.

Claims (9)

By laminating a brazing material on the joint surface between two plate members made of different materials to obtain a plate member laminate, and heating the plate member laminate, the two plate shapes A method for producing a dissimilar material joined body for producing a dissimilar material joined body in which members are joined,
One plate-like member of the two plate-like members is provided with a plurality of groove portions extending from the side surface along the joint surface, and a plurality of opening portions opened in communication with the groove portion on the side surface, and the joining On the surface, a non-joining region formed by the groove, and a plurality of joining regions that are partitioned by the non-joining region and join between the two plate-like members are formed,
Said plate-like member laminate the pair of embossing die in a state of sandwiching through a sheet-like release material, the edge portion at the fixing portion of the sheet-like edge portion of the releasing member closer to the opening provided in the mold-pressing While fixing so as not to cause warpage , the heating material is heated to a temperature higher than the melting temperature of the brazing material, and the pressure of the heating atmosphere is reduced to a pressure lower than the vapor pressure of the brazing material, so that the gap in the non-bonded region is reduced. The manufacturing method of the dissimilar-materials joined body which discharges | emits the said brazing material which becomes surplus as vapor | steam from the said opening part.   The manufacture of the dissimilar material joined body according to claim 1, wherein a sheet-like material made of a material containing at least one selected from the group consisting of silicon, carbon, aluminum nitride, aluminum oxide, and silicon carbide is used as the release material. Method.   The method for producing a dissimilar material joined body according to claim 1 or 2, wherein a brazing material of a metal or an alloy containing at least one selected from the group consisting of copper, silver, and aluminum is used as the brazing material.   The manufacturing method of the dissimilar-materials joined body of any one of Claims 1-3 which clamps the said plate-shaped member laminated body by applying the pressure of 0.1-100 Mpa with the said pressing die.   One plate member of the two plate members is composed of a metal or an alloy capable of causing at least one phase transformation selected from the group consisting of martensite transformation, bainite transformation, and pearlite transformation by cooling of the austenite phase. The manufacturing method of the dissimilar-materials joined body of any one of Claims 1-4 which uses a thing.   The manufacturing method of the dissimilar-materials joined body of any one of Claims 1-5 using what was comprised from the tungsten carbide base cemented carbide as the other plate-shaped member of the said two plate-shaped members.   The manufacturing method of the dissimilar-material joined body of any one of Claims 1-6 which made the width | variety of the said groove part 50-1000 micrometers. Method for manufacturing a bonded body of different members according to claim 1 where the minimum value of the area of the junction area and 0.1 to 100 mm ^2.   A back hole for introducing a forming raw material is formed in one plate-like member constituting the dissimilar material joined body so as to communicate with the groove portion, and the other plate-like member constituting the dissimilar material joined body is formed. 9. A die for forming a honeycomb structure as the dissimilar material joined body is formed by forming slits for forming the forming raw material in a lattice shape so as to communicate with the groove portions. A method for producing a dissimilar material joined body according to claim 1.