JPS6152983A - Method of welding iron and steel material and copper material - Google Patents

Abstract

PURPOSE:To weld an iron and steel material and a copper material without causing distortion at a low temperature range by making brazing using metal that can braze the iron and steel material and the copper material, and further making TIG welding by using copper or copper alloy as filler metal. CONSTITUTION:The weld zone 6 of a partition plate 2 made of steel and a copper tube 5 is cleaned by a solvent or weak acid, and this weld zone 6 is brazed by solder. Then, TIG or gas flame welding is made over it using copper alloy as filler metal. At this time, the solder and copper alloy melt together and form a new alloy. Thus, the copper tube is welded without causing distortion in the iron and steel material.

Description

[Detailed Description of the Invention] The invention of the present application relates to an alloy weld metal forming method for welding two steel materials, and more specifically, the invention is characterized by welding two steel materials at a low temperature without distortion. This invention relates to a method of welding steel materials together.

Conventionally, when closely welding steel materials, the welding is done using electricity or gas at a high temperature range, which heats the steel materials and causes distortion in the steel materials, causing buckling deformation and deformation. This caused the steel material to be completely welded to the steel material.

The present invention has been made as a result of intensive research to eliminate the drawbacks of such welding methods, and has completed a method for welding steel materials without causing distortion to the steel materials. After cleaning the steel material, a metal or alloy that can be brazed to the steel material is brazed to the above-mentioned metals, and then the brazed copper or copper alloy is used as a filler material by TIG welding or gas welding. This is a special welding method for welding iron and steel materials.

Hereinafter, the method of the present invention will be explained in detail based on Examples.

FIG. 1 is a partially cutaway sectional view of a hot air cooler illustrating the method of the present invention. The hot air cooler (1) includes a main body container (1),
It consists of a lid (1a) and a partition plate (2), and the partition plate (2) is removably attached while being sandwiched between the main container (1) and the lid (1+L). . The lid (1a) is provided with a partition plate (1b) that divides the interior into two parts, and the top of the lid (1a) has a hot air inlet (1c) and an exhaust port (Id) separated through the partition plate (1b). ) is installed.

In addition, a water supply port (3) is provided on one side of the main body container (1), and a drain port (4) is provided on the other side, and a U-shaped steel pipe ( 5) are installed, and both ends (5a) and (5b) of the U-shaped steel pipe (5) are 1'
? This is to be welded to Hffl (2).

Hot air first enters through the air inlet (IC) installed at the top of the lid (1a) and is introduced into the pipe end (5a) of the U-shaped steel pipe (5) welded to the partition plate (2). and the water inlet (3
) The hot air passing through the U-shaped steel pipe (5) is cooled down to the pipe end (5b) by the cooling water supplied from the exhaust port (
1d) is exhausted. Further, the cooling water supplied from the supply port (3) is discharged from the drain port (4). The pressure of the hot air is approximately 3.5 kg/c♂, the degree of blackness is approximately 250°C, the water pressure of the cooling water is 2 to 3 kg/am, and the water temperature is approximately 30°C.

In an embodiment of the method of the present invention, the above U-shaped steel pipe (5) is connected to a partition plate (
2), which prevents water from heating up between the partition plate (2) and the steel pipe (5).

To describe this embodiment in more detail, the rlIi half of the partition plate (2) is 600 mm, the thickness is 30+nrn, and the partition plate (2) is
) with a diameter (D) of 10 mm steel pipes (5) are welded at intervals of 4 mm. The welding process begins with l'1'': J plate (2
) (made of SS 41 steel) and the welded part of the copper pipe (5) (
6) was purified with a solvent or a weak acid, and the Sn content of this welded part (6) was 62 to 641! ≦, pH 36-38%
After attaching 1) with solder having a melting point of 183°C,
A copper alloy of Cu 9QX or more and Sn 10 and the following is welded thereon using a TIG or gas flame as a filler material.

At this time, the hang and the copper alloy become compatible and form a new alloy. That is, the melting point of solder is at most 1. ) around 180°C, and the melting point of copper alloys is as high as 900°C, but when carried out as described above, a new alloy with a melting point of 350-400°C is formed.

In addition, in the above example, the metal content of the solder was limited, but
In the present invention, the metal content of 5n-Pb is not specified in any way, and there is no need to limit the content as long as it can braze steel materials and copper materials, and there is no need to limit the metal content in any material other than solder. It can be applied to metals (or alloys) in which steel materials are brazed together.

In addition, the copper alloy used as a filler material on the solder is also Cu.
-5n alloy, pure copper or other copper alloys can be used, and in addition to Cu-5a alloy, copper t!
A similar effect can be produced even if the In addition, the contents of each metal shown in the above examples are weight %.

As described above, the end portion (5) of the steel pipe (5) is attached to the partition plate (2).
If a) and (5b) are welded, no distortion will occur in the steel material of the partition plate (2).

In other words, the pipe end (5a) of the copper pipe (5) of the partition plate (2), (
When hot air of about 250℃ - 3.5 kg/cm' is blown from part 5b), the temperature of the hot air is higher than the melting point of the solder if the partition plate (2) and the steel pipe (5) are still soldered, so the solder will not melt. It melts and the steel pipe (5) comes off from the partition plate (2). In addition, the above-mentioned delicious Cu-5a alloy can be used directly! 1″?
If the J plate (2) and the steel pipe (5) are welded, since the melting point of this alloy is as high as 900°C, strain will occur in the steel material of the partition plate (2), causing buckling and deformation. .

However, as in the present invention, a new alloy with a melting point of 350 to 400°C can be formed by brazing steel materials with solder or the like and then contacting them with copper or a copper alloy as a filler material. Even if hot air is passed through the steel pipe (5), the weld will not melt because the melting point of this alloy is higher than the temperature of the hot air. In addition, since the maximum melting point is quite low at 400°C, there is no need to raise the temperature of the TIG or gas flame so high, and therefore there is no need to heat the steel material that is the material of the partition plate (2) to a high temperature. , no external or internal distortion occurs.

As described above, according to the method of the present invention, when welding a steel pipe to a steel material that is a base material, the steel pipe is brazed to the steel material with solder or the like in advance, and then copper or copper alloy is added as a filler material on top of the steel pipe. Welded using a TIG or gas flame, with a melting point of 350
By forming a new alloy at ~400°C, steel pipes can be welded without causing any distortion to the steel material. Even if welded steel pipes closely together, no distortion will occur, so there will be no buckling or deformation, and there will be no water leakage from the welded area. By fixing copper-based components to various devices and components made of steel using the invented method, unprecedented thermal efficiency and electrical conductivity (
Commercialize something great.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of a hot air cooler for explaining the method of the present invention. FIG. 2 is a longitudinal sectional view showing a welded part according to the present invention. In the diagram, (2): Partition plate (5): Copper pipe (6): Welded part

Claims (1)

[Claims] 1. After cleaning the surfaces of the steel and copper materials, braze the metals or alloys that can be brazed to the steel and copper materials, and then apply copper or copper alloy on top of the brazing. A method for welding steel and copper materials, characterized by welding using TIG welding or gas welding as a filler metal.