Heat releasing welding powder formula

Abstract

The invention provides a heat releasing welding powder formula. The basic components of the formula of heat releasing welding powder are mixed copper oxide powder, aluminum powder and other auxiliary materials. One kind of the mixed copper oxide powder is copper oxide sheets with the oxidation rate being over 80%, the oxygen content being 13.5% and the particle size ranging from 30 meshes to 100 meshes, and the other kind of the mixed copper oxide powder is the mixed copper oxide powder with the oxidation rate being 50% to 75% and the particle size ranging from 30 meshes to 100 meshes obtained by mixing copper oxide wires with the oxidation rate being 40% to 60%. The aluminum powder is flaky atomizing aluminum powder with the particle size ranging from 40 meshes to 60 meshes. The other auxiliary materials are mixed powder of iron powder, fluorite powder, silicon iron powder and silicon dioxide powder, and the particle size ranges from 100 meshes to 200 meshes. The heat releasing welding powder formula does not contain phosphorus, sulfur, lead, tin, magnesium and other poisonous metal. The heat releasing welding powder formula adjusts the reaction speed and the reaction temperature by adjusting the oxidation rate and the particle size of the mixed copper oxide powder, and is stable in welding, free of splashing and free of welding seam defect.

Description

technical field [0001] The invention belongs to the technical field of welding powder for welding materials, and in particular relates to a formula of exothermic welding powder. Background technique [0002] Usually metal welding needs external power supply or combustible gas for electric welding or gas welding to carry out welding operation, but it is very inconvenient for carrying operations such as high-altitude field. Exothermic welding technology is suitable for welding in complex environments due to its simple equipment, low investment, fast welding operation, no need for high-power power supply, and simple operation. [0003] Exothermic welding is to use the chemical reaction between aluminum and copper oxide, use high temperature in the high-temperature resistant graphite mold to reduce the copper oxide to the highly active aluminum, and generate ultra-high heat molten copper in the mold to melt the metal conductor, using a certain shape and size The mold cavity to ...

AI Technical Summary

Problems solved by technology

[0004] CN200910092115.1 discloses a high-safety copper-clad steel / copper grounding grid exothermic flux. Its technical solution provides an exothermic flux. The exothermic flux welding copper oxide component weight percentage is 45-65%. Improve fluidity, increase the weight of metal tin powder by 1% to 3%, which contains expensive metal tin to increase the cost of exothermic agent

[0005] CN1069215A A Chinese patent for flux and igniter used for thermal flux welding of copper-connected wires. It uses exothermic reaction as a heat source for welding. This flux adds pure copper powder to the formula for cooling, which will affect The temperature of the molten metal affects the metal welding and the quality of the weldment is unstable