Heat-releasing welding flux for iron-base copper-clad steel grounding grid

A technology of exothermic flux and copper-clad steel, which is applied in the direction of aluminothermic welding equipment, welding medium, welding equipment, etc., can solve the problems of lowering the melting point temperature of welded joints, reducing the stability of joints, thermal cracks and pores, etc., to achieve improved resistance Corrosion ability, reduction of hot crack and porosity formation, effect of joint surface smoothing

Inactive Publication Date: 2014-03-19
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Another example is an application for an invention patent with the application number CN201110116020.1 and the title of the invention is "A Copper-clad Steel/Copper Grounding Grid Exothermic Flux", which involves an exothermic flux, which is composed of copper oxide, metallic copper powder, and metallic aluminum powder. , red iron oxide, black iron oxide, silicon-calcium powder, and fluorite powder, wherein the weight percentage of copper oxide c

Method used

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  • Heat-releasing welding flux for iron-base copper-clad steel grounding grid
  • Heat-releasing welding flux for iron-base copper-clad steel grounding grid
  • Heat-releasing welding flux for iron-base copper-clad steel grounding grid

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Embodiment 1

[0050] An exothermic flux for an iron-based copper-clad steel grounding grid, comprising the following components in parts by weight:

[0051]

[0052]

[0053] The mass percent content of molybdenum is 50%.

[0054] When using the ignition agent to ignite the exothermic flux of the present invention, the mass ratio of the ignition agent to the exothermic flux is 1:55.

Embodiment 2

[0056] An exothermic flux for an iron-based copper-clad steel grounding grid, comprising the following components in parts by weight:

[0057]

[0058] The mass percent content of molybdenum is 55%. When using the ignition agent to ignite the exothermic flux of the present invention, the mass ratio of the ignition agent to the exothermic flux is 1:60.

Embodiment 3

[0060] An exothermic flux for an iron-based copper-clad steel grounding grid, comprising the following components in parts by weight:

[0061]

[0062]

[0063] The mass percent content of molybdenum is 60%.

[0064] When using the ignition agent to ignite the exothermic flux of the present invention, the mass ratio of the ignition agent to the exothermic flux is 1:60.

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Abstract

The invention provides heat-releasing welding flux for an iron-base copper-clad steel grounding grid. The heat-releasing welding flux comprises, by weight, 0-15 parts of Fe2O3, 21-55 parts of Fe3O4, 15-22 parts of metal aluminum powder, 5-10 parts of metal chromium powder, 4.5-7 parts of CaF2 powder, 2-3 parts of metal tin powder, 0.1-2.5 parts of metal nickel powder, 0-15 parts of metal iron powder, 1.1-2.5 parts of calcium silicon powder and 0.5-3.5 parts of iron alloy powder. According to the heat-releasing welding flux, the iron oxide and the aluminum powder serve as basic materials, and cost is greatly reduced; the fluidity of molten metal can be improved through the CaF2 powder, and gas is easily discharged. The metal chromium powder is added, a stable and compact oxide film can be generated by the chromium, and the corrosion resistance of metal can be remarkably improved by the fact that the chromium is added into the metal such as the iron.

Description

technical field [0001] The invention relates to the field of metal welding, in particular to an exothermic flux for an iron-based copper-clad steel grounding grid. Background technique [0002] The power grid grounding system can ensure the safe operation of the power system and electrical equipment, and at the same time ensure the personal safety of the power system operators and other personnel, so the design of the grounding system is a very important link in the construction of power engineering. In the field of power grid grounding, people pay more and more attention to the reliability of the grounding grid, and many grounding projects have gradually adopted copper-clad steel with better corrosion resistance and lower cost. [0003] Exothermic welding is a simple, high-efficiency, high-quality metal joining process. It uses the chemical reaction heat of metal compounds as a heat source, and works through superheated (reduced) molten metal, direct or indirect heating, an...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/36B23K23/00
CPCB23K35/3602B23K35/362
Inventor 王晓芳韩钰聂京凯陈新
Owner STATE GRID CORP OF CHINA
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