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Heat release welding flux based on copper-iron alloy

A technology of exothermic flux and copper-iron alloy, applied in welding equipment, welding medium, metal processing equipment, etc., can solve problems such as easy generation of thermal cracks and pores, poor welding strength, and corrosion of welding points, and achieve tensile and compressive resistance High strength, not easy to rust and crack, good mechanical properties

Active Publication Date: 2022-02-01
绍兴十目科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the welded part obtained by hot-melt solder contains impurity elements hydrogen, oxygen, sulfur, and phosphorus, which are prone to thermal cracks and pores, reducing the stability and conductivity of the welded part, and because the existing solder powder cannot make copper-iron alloy , when dealing with copper-iron weldments, problems such as corrosion and cracking are prone to occur at the welding points, and the welding strength is relatively poor

Method used

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  • Heat release welding flux based on copper-iron alloy
  • Heat release welding flux based on copper-iron alloy

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Experimental program
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Effect test

Embodiment 1

[0028] Exothermic solder powders based on copper-iron alloys, which, by weight components, include the following components:

[0029] Copper oxide: 10 parts, copper powder: 35 parts, iron powder: 5 parts, aluminum powder: 20 parts, tungsten powder: 0.5 parts, silicon powder: 0.2 parts. Wherein the purity of the aluminum powder is ≥99.5%, and its particle size is 80 mesh; the oxidation degree of the copper oxide is 75%; the purity of the copper powder is ≥99.9%, and the particle size is 70 mesh; the purity of the iron powder is ≥99.9%, The particle size is 100 mesh.

[0030] Since the melting point of iron powder is very high, reaching 1538°C, which is much higher than the melting point of copper powder at 1083°C, after the exothermic solder powder and igniter are ignited at a ratio of 50 to 1, copper oxide first produces thermite with aluminum powder Reaction, reaction chemical equation is as follows:

[0031] 3Cu 2 O+2Al→6Cu+Al 2 o 3

[0032] A large amount of heat gene...

Embodiment 2

[0034] Exothermic solder powders based on copper-iron alloys, which, by weight components, include the following components:

[0035] Copper oxide: 20 parts, copper powder: 45 parts, iron powder: 8 parts, aluminum powder: 40 parts, tungsten powder: 0.6 parts, silicon powder: 0.3 parts. The purity of the aluminum powder is ≥99.5%, and its particle size is 100 mesh; the oxidation degree of the copper oxide is 85%; the purity of the copper powder is ≥99.9%, and the particle size is 800 mesh; the purity of the iron powder is ≥99.9%, The particle size is 120 mesh.

Embodiment 3

[0037] Exothermic solder powder based on copper-iron alloy, the solder powder includes the following components by weight: copper oxide: 25 parts, copper powder: 50 parts, iron powder: 12 parts, aluminum powder: 50 parts, tungsten powder : 1 part, silicon powder: 0.4 parts, the purity of the aluminum powder is ≥99.5%, and its particle size is 120 mesh; the oxidation degree of the copper oxide is 87%; the purity of the copper powder is ≥99.9%, and the particle size is 100 mesh mesh; the purity of the iron powder is ≥99.9%, and the particle size is 140 mesh.

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Abstract

The invention discloses a heat release welding flux based on a copper-iron alloy, and relates to the technical field of welding. The heat release welding flux comprises the following components: 10-25 parts of copper oxide, 35-50 parts of copper powder, 5-12 parts of iron powder, 20-50 parts of aluminum powder, 0.5-1 part of tungsten powder and 0.2-0.4 part of silicon powder. The copper-iron alloy is generated after the heat release welding flux is ignited; the copper-iron alloy has good mechanical property, conductivity and corrosion resistance, does not contain harmful metals such as phosphorus, sulfur, lead, tin and magnesium and is good in welding quality; and welding points are not prone to rusting and cracking, and the welding points can endure repeated large surge current without degradation.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a copper-iron alloy-based exothermic flux. Background technique [0002] Usually metal welding requires an external power supply or combustible gas for electric or gas welding, but it is very inconvenient for carrying operations such as high-altitude fields. Exothermic welding technology is widely promoted because of its simple equipment, low investment, fast welding operation, no need for high-power power supply, and simple operation. [0003] The principle of exothermic welding is that after the exothermic flux is ignited, the chemical reaction between aluminum and copper oxide is used to use high temperature in the high-temperature resistant graphite mold to reduce the copper oxide to the highly active aluminum, and to generate ultra-high heat copper in the mold. Liquid molten metal conductor, using a mold cavity of a certain shape and size to complete the modern welding proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/30
CPCB23K35/302B23K35/286
Inventor 吴明云
Owner 绍兴十目科技有限公司
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