KR20150125843A - Filler metal shape for welding - Google Patents

Abstract

Provided is a filler metal for welding which enables convenient manufacture by manufacturing a C-shaped filler metal through a forming of a wire having various types of circular cross sections; and enables efficient supply by preventing corner parts from being generated. To achieve this, the present invention, which is the filler metal for welding, has the C-shaped cross section dented to a welding tip, and the C-shaped cross section of the filler metal obtained by forming a raw material.

Description

[0001] Filler metal shape for welding [0002]

TECHNICAL FIELD The present invention relates to a welding consumable material, and more particularly, to a welding consumable material having a C-shaped cross section.

In general, carbon steel, which is a low-grade material, is mainly used in piping systems for power generation facilities, offshore plants, and petrochemical plants. It is a heterogeneous metal having high heat resistance, durability and corrosion resistance properties such as stainless steel or nickel alloy It is used by thick-walled welding. This type of welding is usually used for underfoot welding. In the environment where the material is weak, it is coated with a metal to improve the properties such as corrosion resistance, durability, abrasion resistance and strength. It is widely used because it can match the mechanical and chemical properties.

Many automation devices for the above-mentioned upsurging welding have been developed and used. For example, Patent No. 909596 relates to an automatic pipe-growing welding apparatus for a pipe, comprising: a rotating chuck for inserting and fixing a pipe and rotating the pipe; A pair of guide wires disposed horizontally and parallel to each other through a pipe fixed to the rotary chuck; A pulling portion for pulling the guide wire; A welded portion supported by the guide wire and movable along the inside of the pipe, for performing upset welding on the inner surface of the pipe; And a controller for controlling the rotation of the pipe by the rotary chuck to move the welding part to one side so that the welding bead is continuously formed while forming the spiral of the welding bead on the inner surface of the pipe.

Japanese Patent No. 383014 relates to a hot wire tig welding torch, and is directed to a hot wire tig welding torch capable of smoothly performing the upside welding of the inner diameter of the pipe having a small diameter and a long length, A body portion connected to the connection portion and having an appropriate length and connected to both ends by an insulator and an electrode portion connected to the body portion in a longitudinal direction of the body portion so that a product having a pipe inner diameter of at least 150 mm can be welded , And 1.5M can be welded to the inside of the pipe, so that the present invention can be effectively applied to internal pipe-growing welding with a small diameter and a long length.

The above-described upsized welding apparatus proposed a welding method of TIG welding. The TIG welding has an advantage of excellent mechanical properties and corrosion resistance of a welded portion and a clean working environment, but has a problem of low productivity.

In order to increase the productivity of TIG welding, it is necessary to increase the current and increase the welding speed. However, when a large current is used, a strong indentation phenomenon occurs on the molten surface due to a strong arc force due to arc pressure, and welding such as undercut, humpping bead, In case of large current arc, welding of the base material is deepened and the dilution ratio of the base material and the filler increases, so that the height of the welding bead must be increased to satisfy the required value, so that the welding cost becomes high.

In order to increase the welding speed and increase the productivity, it is necessary to increase the speed of the wire transfer. However, when a thin wire of 1.0 or 1.2 mm is used, there is not enough time to absorb the arc heat due to high wire transfer speed. If the wire is misaligned, the wire does not melt and escapes from the molten pool to form an untreated wire. If untreated wire is formed, the welding is stopped and the productivity is lowered. In particular, according to the plasma stream theory, the thin wire has a high arc pressure formed at the center of the welding arc and a small area that blocks the inflow of the heat flux into the base material. Therefore, the penetration of the base material becomes deep due to the heat flux flowing around the thin wire, And the bead height must be increased to satisfy the requirement of the alloy component, thereby increasing the welding cost.

In order to overcome the above disadvantages, the present applicant has proposed a flat plate-like filler in Patent Application No. 2012-0096720 filed by the present applicant, and it has been confirmed that the flat plate described above exhibits excellent welding characteristics as compared with the conventional circular cross- Further research has confirmed that the cross-section of the grooved material has a higher welding characteristic than that of the flat plate-like filler when it is formed into a curved shape, that is, a C-shape, and has been filed as Patent Application No. 2013-0098314.

The above-mentioned patents relate to a flat plate-like filler and a flattened plate-like deformable filler, and both of them exhibit excellent welding characteristics through various tests. Particularly, the C-type filler exhibits more excellent characteristics than the plate- Is the expected configuration.

However, since the commonly used commonly used materials are mainly composed of circular cross-sections, the above-mentioned materials should be processed separately in the form of a flat plate, and in the case of the C type of the above-mentioned patent, Since it is molded into a C-shape, it is difficult to manufacture. In addition, the corners are sharply formed due to the characteristics of the flat plate shape, and the feed speed sometimes becomes uneven due to frictional interference with the feeding device during feeding.

The present invention has been conceived to overcome the disadvantages of the related art as described above, and it is an object of the present invention to provide a method for manufacturing a base wire of various types, It is an object of the present invention to provide a possible welding consumable material.

In order to attain the above object, the present invention is characterized in that, in a welding consumable material having a C-shaped cross-sectional shape recessed toward a welding tip, the C-shaped cross section of the above-mentioned filler material is obtained by molding a raw material.

Preferably, the C-shaped cross section includes: a lower curved surface forming a lower surface; An upper curved surface forming an upper surface; And two curved side surfaces forming side surfaces, wherein the curved lower surface and the upper curved surface are curved downward, and the curved surface is curved toward the upper right and upper left.

More preferably, the curvatures of the curved surfaces have the largest curved surface.

More preferably, the curvatures of the curved surfaces have a size of a curved surface, a bottom curved surface, and a top curved surface.

Preferably, the curvatures of the curved surfaces have a size in the order of a curved surface, an upper curved surface, and a lower curved surface.

Preferably, the raw material is a circular wire.

Preferably, the raw material is a powder wire containing powder therein, and the C-shaped cross-section further includes an inner diameter portion in which the powder is located.

More preferably, the powder wire includes a shim, and the C-shaped cross-section further includes a shim formed by the shim.

Preferably, the raw material is a tubular wire having a space formed therein, and the C-shaped cross-section further includes an inner diameter portion in which the space is deformed.

Preferably, the raw material is a tubular wire having a space formed therein, and the C-shaped cross-section is characterized in that wire materials forming the inner space contact each other.

Preferably, the tubular wire includes a shim, and the C-shaped cross-section further includes a shim formed by the shim.

Preferably, the tubular wire includes a shim, and the C-shaped cross-section further includes a shim formed by the shim.

Preferably, the raw material is a dissimilar wire in which an alloy of another material is disposed therein, and the C-shaped cross section includes an inner diameter portion due to deformation of the alloy.

More preferably, the alloy is characterized by being in a circular shape.

Preferably, the alloy is rectangular in shape.

Preferably, the dissimilar wire includes a shim, and the C-shaped cross-section is formed with a shim formed by the shim.

Preferably, the raw material is an intermediate material having a sectional area of 10 mm < 2 > to 50 mm < 2 >

More preferably, the area of the C-shaped cross section is 0.785 mm 2 to 19.6 mm 2.

The welding consumable according to the present invention is advantageous in that it can be manufactured in a C shape by molding a base wire having a circular cross-sectional shape, thereby making it easy to manufacture and lowering the manufacturing cost. Further, since corner portions are not separately formed, It is possible to obtain an improvement in production speed. Furthermore, since the base wire can be selected in various combinations, it is possible to produce a variety of fillers.

1 is a sectional view of a welding consumable material according to the present invention,
Fig. 2 is a cross-sectional view of a spark plug in which shims are added in Fig. 1,
Figure 3 is another embodiment of the present invention,
Fig. 4 is a cross-sectional view of the consumable material when the shim is added to Fig. 3,
Figure 5 is another embodiment of the present invention,
Fig. 6 is a cross-sectional view of a spark plug in which a shim is added to Fig. 5,
Figure 7 is another embodiment of the present invention,
Fig. 8 is a cross-sectional view of the consumable material when the shim is added to Fig. 7,
Fig. 9 is a schematic diagram for producing a filler according to the present invention using a billet. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The welding consumable material 10 according to the present invention is characterized by having a sectional shape as shown in Fig.

The filler material 10 is a shape that can be produced by press-molding the upper end of a circular wire 1 which is a raw material and includes a lower curved surface 11, two curved surfaces 12, At this time, the lower curved surface 11 is formed with the smoothest curve, then the upper curved surface 13, and finally the upper curved surface 13.

At this time, the upper curved surface 13 may be formed more gently than the lower curved surface 11 if necessary to form the center of the fusible material 10 thickly.

The direction of the curve is such that the lower curved surface 11 and the upper curved surface 13 are directed downward and the curved surface 13 is formed in the upper left and upper right directions.

That is, the curved surface (the curved surface means the average curvature as a whole) is the lower curved surface 11 and the largest surface is the curved surface 12.

The arrangement of the curvature is such that the entire length of the filler material 10 is formed wide in the width direction to improve the weldability.

The curved surfaces 12 are formed on the left and right sides, respectively. If necessary, the curved surfaces 12 may have the same curvature. However, some differences may occur due to manufacturing errors occurring during the manufacturing process.

Of course, it can also be configured as an asymmetric form.

Also, if necessary, the filler material 10 may be symmetrical with respect to the central vertical line, but some differences may also occur due to manufacturing errors occurring during some manufacturing processes.

The circular wire 1, which is a raw material, is generally used as a welding consumable material, and its diameter is usually 1 to 5 mm, which is the most commonly used, and its cross-sectional area is 0.785 to 19.6 mm 2, Is the same as the cross-sectional area of the circular wire 1, but a slight difference due to some material properties may occur.

It is preferable that the filler 10 has a thicker central portion than both ends. In particular, since the filler material 10 is disposed so that the electrode is positioned at the center portion thereof, the center is exposed to the greatest energy, so that the center portion is thicker than the end portion as described above.

2, when the padding 8 is formed, the filler padding 18 is molded so as to be located at the center of the upper curved surface 13 to form the spark plug 10 However, it can be suitably changed in consideration of convenience in manufacturing and the like.

Meanwhile, as shown in FIG. 3, a powder wire 2 filled with powder is proposed and used.

The powder wire (2) is in the form of a tube, and the inside (9) contains powder composed of a plurality of components.

The material of the tube is usually made of nickel and the inside 9 is filled with a powder such as chromium (Cr), molybdenum (Mo), titanium (Ti), niobium (Nb) When completed, the powder is constituted by a composition ratio in which the weld portion is formed of a nickel alloy 625 or a nickel alloy 825.

The powder wire 2 is also applied as a raw material and can be manufactured by molding into a shape of a spark plug 10 as shown in Fig.

3 includes a separate inner diameter portion 20 and the inner diameter portion 20 is also composed of a curved inner surface 21, two inner curved surfaces 22 and an inner curved surface 23, Each curvature is the same as that of the outer surface.

As shown in FIG. 4, the powder wire 2 may include a shim 8 due to manufacturing or the like, and the shim 10 may also be formed with a shim 18 by molding, It is preferable that the excavator shim 18 is also located at the center of the upper curved surface 13, but it is changeable.

Further, the tubular wire 3 having no powder inside can be produced by molding the filler 10 as shown in Fig.

Since the filler 10 of FIG. 5 has the same shape as that of the powder wire 2, but the molding can be easily performed, the lower curved surface 11 and the upper curved surface 13 can be formed more gently, (12) may be configured to have a sharp curve.

At this time, if necessary, the inner diameter portion 20 may be completely press-molded so that a space is not formed.

Particularly, since the tubular wire 3 is advantageous in molding, it is advantageous in that it can be formed into various curvatures.

When the shim 8 is formed on the tubular wire 3, it is preferable that the shim 8 is formed by molding as shown in Fig. 6, and the shim 18 is located at the center of the upper curved surface 13 as well.

On the other hand, as shown in Fig. 7, a different material wire 4 including a separate metal alloy may be formed in the inside 9 of the tubular wire 3 to produce the sparkling material 10. [

The metal located in the inside 9 of the dissimilar wire 4 is made of a material different from the material of the tubular wire 3 and can be configured to exhibit a new type of property by combining two metals upon melting.

In this case, when the inner metal 9 is formed into a circular shape, the inner diameter portion 20 is formed in a soft shape, and when the inner metal 9 is formed in a square shape, the inner diameter portion 30 may be formed in a flat plate shape .

When the core wire 8 is formed on the tubular wire 3 of the dissimilar wire 4, the filler material 10 is manufactured as shown in FIG. 8, ).

The wire 1 may be replaced with an intermediate material 35 obtained by processing the billet 30. The wire 1 may be replaced with an intermediate material 35 obtained by processing the billet 30.

As shown in FIG. 9, the billet 30 has a circular or rectangular cross section, and the diameter of the circular shape and the length of one side of the square are about 37.5 mm to 150 mm. The billet 30 is actually processed into the circular wire 1 used in a scouring company through various processes, and the processing is mainly performed in a steelmaking company.

9, the billet 30 is rolled into an intermediate material 35 having an area of 10 mm 2 to 50 mm 2, and then the intermediate material 35 is rolled or drawn to obtain 1 mm 2 When the C-type filler 10 having a cross-sectional area of 5 mm 2 to 5 mm 2 is processed, the C-type filler 10 can be manufactured at a lower cost.

When the intermediate material 35 is molded to have the above-mentioned cross-sectional area, it is relatively easy to form the intermediate material 35 into the C-type filler 10.

On the other hand, the welding consumable material 10 according to the present invention can be applied to any welding method. For example, it can be applied to arc welding, gas welding, TIG welding, laser welding, submerged arc welding, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

1: Circular wire 2: Powder wire
3: tubular wire 4: different wire
8: Shim 9: Inside
10: Fugitive material 11: Lower surface
12: side curved surface 13: upper curved surface
18: sparse core 20: inner neck portion
21: curved surface 22: curved surface
23: Top surface 30: Billet
35: intermediate material

Claims (18)

In a welding consumable material having a C-shaped cross-sectional shape concave toward a welding tip,
Wherein the C-shaped cross section of the above-mentioned negative electrode material is obtained by molding a raw material.
[2] The method of claim 1, wherein the C-
Bottom curved surface;
An upper curved surface forming an upper surface; And
Wherein the lower curved surface and the upper curved surface are curved downward and the curved surface is curved toward the upper right and left upper sides.
The welding consumable according to claim 2, wherein the curved surface has a largest curved surface.
4. The scarf for welding according to claim 3, wherein the curvatures of the curved surfaces have a size of a curved surface, a bottom curved surface, and a top curved surface.
The welding consumable material according to claim 3, wherein the curvatures of the curved surfaces have a size in the order of a curved surface, an upper curved surface, and a lower curved surface.
The finishing material for welding according to any one of claims 1 to 5, wherein the raw material is a circular wire.
The finishing material for welding according to any one of claims 1 to 5, wherein the raw material is a powder wire containing powder therein, and the C-shaped cross-section further includes an inner diameter portion in which the powder is located.
[7] The spark plug according to claim 7, wherein the powder wire further comprises a shim, and the C-shaped cross-section further includes a shim formed by the shim.
The finishing material for welding according to any one of claims 1 to 5, wherein the raw material is a tubular wire having a space formed therein, and the C-shaped cross-section further includes an inner diameter portion in which the space is deformed.
The welding material according to any one of claims 1 to 5, wherein the raw material is a tubular wire having a space formed therein, and the C-shaped cross-section is a wire material for forming the inner space, .
[12] The spark plug according to claim 9, wherein the tubular wire further comprises a shim, and the C-shaped cross-section further includes a shim formed by the shim.
[Claim 11] The spark plug according to claim 10, wherein the tubular wire further comprises a shim, and the C-shaped cross-section further comprises a shim formed by the shim.
The welding method according to any one of claims 1 to 5, wherein the raw material is a dissimilar wire in which an alloy of another material is located, and the C-shaped cross section includes an inner diameter portion due to deformation of the alloy Used materials.
14. The welding consumable material according to claim 13, wherein the alloy has a circular shape.
14. The welding consumable material of claim 13, wherein the alloy has a rectangular shape.
[14] The welding consumable material according to claim 13, wherein the dissimilar wire comprises a shim, and the C-shaped end has a shim formed by the shim.
The finishing material for welding according to any one of claims 1 to 5, wherein the raw material is an intermediate material having a sectional area of 10 mm < 2 > to 50 mm < 2 >
[19] The welding consumable material according to claim 17, wherein the C-shaped cross section area is 0.785 mm < 2 >

Images