JPH08103888A - Filler metal for cladding by welding - Google Patents

Abstract

PURPOSE: To provide a filler metal for cladding by welding which is large in the degree of freedom of the alloy component to be added and used in a wide range of applicability by constituting a core of the metallic material or alloy suitable for the welding base metal to improve its surface, and winding the metallic wire or alloy wire around this core. CONSTITUTION: The filler metal 1 for cladding by welding is the composite wire in which a core is made of the metallic material or alloy 2 suitable for the welding base metal to improve its surface, and one or more metallic wire or alloy wire 3 is wound around this core. Such welding base metal includes aluminum alloy, titanium alloy, magnesium alloy, and stainless steel. The metal which is suitable for the metal of the welding base metal, e.g. aluminum alloy is selected as the core. The metallic wire such as copper, iron and tungsten to be added in the core or the alloy wire such as stainless steel and nichrome is preferably used as the wire to be wound around the core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filler metal for overlay welding used for modifying the surface of a base metal.

[0002]

2. Description of the Related Art Conventionally, aluminum and aluminum alloys have been used in a wide range of fields including automobile parts because of their light weight and excellent heat conductivity, workability and corrosion resistance. However, these aluminums and aluminum alloys are generally inferior in strength, wear resistance, and heat resistance to steel materials, and the parts and parts that can be applied as substitute materials for steel materials are limited as they are. Various methods such as welding a hard overlay metal to the surface of an alloy or forming a hardened layer have been proposed.

Among these, in Japanese Patent Laid-Open No. 6-23546, an electrode wire 51 as shown in FIGS.
It is melted by G welding and TIG welding and overlay welding is performed on the surface of the base material. This electrode wire 51 has a copper pipe 5
The wire drawing formed by inserting the aluminum rod 53 into 2 is used. In addition, JP-A-5-28569
In Japanese Patent No. 0, the welding composite material 61 as shown in FIGS. 5 and 6 is melted by TIG welding to perform overlay welding on the surface of the base material. The welding composite material 61 uses drawn wire obtained by winding a copper plate 63 on an aluminum rod 62. Furthermore, the literature indicates that OC is one of the continuous casting methods.
C (Ohno Continuous Castin
g) The rod-shaped body cast in the process is melted by TIG welding to perform overlay welding on the surface of the base material. This rod-shaped body is obtained by solidifying the alloy melt continuously supplied into the mold with an external cooling device.

In Japanese Patent Laid-Open No. 6-15482, a composite twisted wire filler 71 as shown in FIGS. 7 and 8 is used.
Is melted by MIG welding and TIG welding to perform overlay welding on the surface of the base material. This filler material 71 is a thin wire 72 made of an aluminum-based material and a thin wire 73 made of a copper-based material.
It is formed by twisting and. Also,
In Japanese Patent Laid-Open No. 169257/1993, a welding wire 81 as shown in FIG. 9 is melted by MIG welding to obtain the welding wire 8
The droplet 1 is added to the molten layer melted by the preceding TIG welding, and the overlay welding is performed on the surface of the base material. This welding wire 8
In No. 1, wire drawing formed by filling aluminum pipe 82 with powder or particles 83 is used. Further, in JP-A-5-337678, an aluminum rod plated with copper is melted by TIG welding or MIG welding to perform overlay welding on the surface of a base material.

[0005]

However, in the method of overlay welding on the surface of the base material using the above-mentioned electrode wire 51 and the welding composite material 61, the aluminum rods 53, 62 and the copper pipes 52, Since alloying with 63 is apt to be insufficient, and it is difficult to keep the ratio of the outer cover (copper metal in this case) low particularly for a wire having a small diameter, the alloy composition has a limit. Further, in the OCC process method, the rod-shaped body used for overlay welding has a relatively large diameter, and it is not possible to manufacture a wire having a small diameter. Moreover, since the build-up material is a high alloy, it is apt to be brittle, so that the alloy composition has a limit. Further, in any of the above-mentioned methods, it is not possible to form a modified layer having an arbitrary composition at an arbitrary location, because only a rod or wire having a constant composition can be manufactured.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a large degree of freedom in the amount of alloy components to be added and to form a modified layer having an arbitrary composition at an arbitrary location. At the same time, it is to provide a filler material for overlay welding capable of alloying a high melting point metal.

[0007]

In order to solve the above problems of the prior art, in the present invention, a core material is a metal material or an alloy material that is compatible with the welding base material for surface modification.
A composite wire is formed by winding a metal wire or an alloy wire to be added to the core material.

[0008]

In the filler metal for overlay welding according to the present invention, a metal material or an alloy material compatible with the welding base material for surface modification is used as a core material, and the metal wire or alloy wire added to the core material is A composite wire is made by winding more than one wire. Examples of such a welding base material include metals such as aluminum alloys, titanium alloys, magnesium alloys, and stainless steel. Further, as the core material, of the above-mentioned metals of the welding base material, for example, an aluminum alloy compatible with this is selected. Then, the wire to be wound around the core material, copper, iron, a metal wire such as tungsten, which is desired to be added to the core material,
Alternatively, an alloy wire such as stainless steel or nichrome may be used.

Therefore, in the filler metal for overlay welding of the present invention, it is possible to change the wire diameter and the winding wire density of the wire wound around the core material, or to use two or more kinds of winding wires. Therefore, the composition can be freely selected. Further, by changing the distribution of the winding linear density of the wire wound around the core material, it becomes possible to easily perform the overlay welding corresponding to the required location and composition of the base material surface modification. . Moreover, the surface area of the metal wire or alloy wire serving as the outer cover is increased, so that the refractory metal can be easily alloyed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

Example 1 FIG. 1 shows an example of a filler metal for overlay welding according to the present invention. The filler metal 1 for overlay welding of the present embodiment is an aluminum alloy welding rod (JIS A) having a diameter of 3.2 mm as a core material.
4043) 2 and a copper wire 3 having a diameter of 0.26 mm which is desired to be added to the aluminum alloy welding rod 2. The copper wire 3 is densely wound around the outer peripheral surface of the aluminum alloy welding rod 2 in the axial direction, and the copper content of the composite wire material as the filler metal 1 for overlay welding is 47.5 wt%. Is set to be

In this embodiment, an aluminum alloy plate (JIS A 1200) is used as a welding base material for surface modification.
P, thickness 10 x width 100 x length 150 mm, hardness Hv8
0) and a TIG welder that performs a gas shield arc welding method as a welder, the surface was modified by overlay welding. Therefore, the aluminum alloy welding rod 2 is a core material of an alloy material compatible with the welding base material of the aluminum alloy plate.

TI is used as a welding base material for the aluminum alloy plate.
In order to perform overlay welding by G welding, first, an arc is generated between the TIG welding torch and the welding base material, and the filler metal 1 for overlay welding of this embodiment is fed into this arc. Then, the filler material 1 is melted and migrates to the surface of the base material that needs to be modified to form a build-up layer. The surface modified layer of the welding base material thus obtained was subjected to a hardness test,
It has a Vickers hardness of about 200 Hv and a sufficient hardness, and the modified layer has excellent wear resistance.

Example 2 The filler metal 1 for overlay welding of this example has a diameter of 2.
4mm aluminum alloy welding rod (JIS A 404
7) 2 and a copper wire 3 having a diameter of 0.26 mm to be added to the aluminum alloy welding rod 2 to form a composite wire rod. The copper wire 3 is densely wound around the outer peripheral surface of the aluminum alloy welding rod 2 in the axial direction, and the copper content of the composite wire material as the filler metal 1 for overlay welding is 5%.
It is set to be 5.0 wt%. The other welding base materials and the TIG welding machine are the same as those used in the first embodiment.

TI is used as a welding base material for the aluminum alloy plate.
To perform build-up welding by G welding, as in the first embodiment, T
An arc is generated between the IG welding torch and the welding base material, and the filler metal 1 for overlay welding of the present embodiment is fed into the arc. Then, the filler material 1 is melted and migrates to the surface of the base material that needs to be modified to form a build-up layer. The surface modified layer of the welded base metal thus obtained has a Vickers hardness of Hv of about 350 and a sufficient hardness when subjected to a hardness test. The layers are endowed with even better abrasion resistance.

The embodiments of the present invention have been described above.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above-mentioned embodiment, one copper wire 3 is wound around the outer peripheral surface of the aluminum alloy welding rod 2 to form the filler metal 1 for overlay welding, but as shown in FIG.
Two different types of metal wires (or alloy wires) 4 and 5 may be wound around the outer peripheral surface of the aluminum alloy welding rod 12 to form the filler metal 11 for overlay welding. Further, the wire diameter and the winding wire density can be changed, and two or more winding wires can be used.

[0018]

As described above, the filler metal for overlay welding according to the present invention has a core material made of a metal material or an alloy material compatible with the welding base material for surface modification, and a metal added to the core material. Since it is formed into a composite wire by winding a wire or alloy wire, it is possible to change the wire diameter and the winding wire density of the wire wound around the core material, or to use two or more types of winding wire. With a large degree of freedom in the amount of alloying components to be added, and by changing the distribution of the winding linear density, it is possible to easily and inexpensively form a modified layer of an arbitrary composition on an arbitrary place on the base metal surface. It is possible to easily alloy a high melting point metal. Therefore, the filler metal for overlay welding of the present invention can be used for a wide variety of parts and structures that require improved wear resistance, and has a wide range of applications and excellent versatility. ing.

[Brief description of drawings]

FIG. 1 is a side view conceptually showing a state in which one copper wire is wound around an aluminum alloy welding rod of a core material in a filler metal for overlay welding according to an embodiment of the present invention.

FIG. 2 is a side view conceptually showing a state in which two metal wires or alloy wires are wound around an aluminum alloy welding rod of a core material in a filler metal for overlay welding according to a modified example of the present invention. .

FIG. 3 is a perspective view showing a conventional electrode wire formed by inserting an aluminum rod into a copper pipe.

FIG. 4 is a cross-sectional view showing the electrode wire.

FIG. 5 is a perspective view showing a conventional welding composite material obtained by winding a copper plate on an aluminum rod.

FIG. 6 is a cross-sectional view showing the welding composite material.

FIG. 7 is a perspective view showing a conventional twisted wire filler in a state where two types of thin wires are twisted together.

FIG. 8 is a cross-sectional view showing the twisted wire filler.

FIG. 9 is a cross-sectional view showing a conventional welding wire.

[Explanation of symbols]

 1,11 Overlay welding filler material 2,12 Aluminum alloy welding rod 3 Copper wire 4,5 Metal wire

Claims (1)

[Claims] 1. A composite wire material comprising a core material made of a metal material or an alloy material compatible with a welding base material for surface modification, and winding a metal wire or an alloy wire to be added to the core material. A filler metal for overlay welding.