High melting point exothermic welding flux for copper-clad steel/copper grounding grid

An exothermic flux, copper-clad steel technology, used in welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of joint cracking, increased brittleness of the structure, etc., and achieve the effect of forming a uniform structure and uniform reliability.

Inactive Publication Date: 2010-02-03
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the intermetallic compounds produced after the addition of high melting point elements can easily lead to increased structural brittleness, resulting in cracking of joints

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A high-melting-point copper-clad steel / copper ground grid exothermic flux, the components and their weight percentages are:

[0027] Copper Oxide 60%

[0028] Aluminum powder 10%

[0029] Metal copper powder 20%

[0030] Fluorite powder 3.5%

[0031] Metal tin powder 2%

[0032] Alloy powder balance.

Embodiment 2

[0034] A high-melting-point copper-clad steel / copper ground grid exothermic flux, the components and their weight percentages are:

[0035] Copper Oxide 55%

[0036] Aluminum powder 9%

[0037] Metal copper powder 30%

[0038] Fluorite Dust 3%

[0039] Metal tin powder 2%

[0040] Alloy powder balance.

Embodiment 3

[0042] A high-melting-point copper-clad steel / copper ground grid exothermic flux, the components and their weight percentages are:

[0043] Copper Oxide 56%

[0044] Aluminum powder 9.5%

[0045] Metal copper powder 25%

[0046] Fluorite Dust 4%

[0047] Metal tin powder 2%

[0048] Metal nickel powder 1.5%

[0049] Alloy powder balance.

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Abstract

A high melting point exothermic welding flux for a copper-clad steel/copper grounding grid belongs to the metal welding field. The existing exothermic welding flux for welding copper-clad steel has the defects of lower melting point of the metal on a joint than the temperature of a base material, poor structural uniformity and the like. The exothermic welding flux comprises the following components by weight percent: 50-60% of copper oxide, 9-10% of aluminium metal powder, 20-35% of copper metal powder, 3-4% of fluorite powder, 2-3% of tin metal powder, 0-5% of nickel metal powder and the balance alloy powder. The exothermic welding flux has the melting temperature close to that of the base metal, and can assure that a grounding body formed by the joint and the base material has even reliability.

Description

technical field [0001] The invention belongs to the field of metal welding, in particular to a high-melting-point copper-clad steel / copper grounding grid exothermic flux. Background technique [0002] With the steady progress of economic development, the demand for energy is increasing year by year, and the process of power construction is gradually accelerating. The development of power construction is reflected in the dual development of infrastructure construction quantity and quality. [0003] In the grounding field of the power grid, people pay more and more attention to the reliability of the grounding grid. The previous galvanized steel grounding grid has excellent economy, but the use temperature is low, especially the galvanized layer, which melts at 420 ° C, such as zinc If the layer melts, the carbon steel that loses the protective layer is very prone to corrosion. With the corrosion of the grounding body, the cross-sectional area of ​​the fault current used to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/34
Inventor 聂京凯马光韩钰陈玉成李现兵陈新徐德录王立全
Owner CHINA ELECTRIC POWER RES INST
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