Brazing aluminium soldering ring for welding aluminum or aluminum alloy product and manufacture method of brazing aluminium soldering ring

Abstract

The invention discloses a welding device, and in particular relates to a brazing aluminium soldering ring for welding an aluminum or aluminum alloy product and a manufacture method of the brazing aluminium soldering ring. The brazing aluminium soldering ring comprises an annular brazing aluminium soldering ring housing, wherein aluminum-silicon alloy wires are arranged in the brazing aluminium soldering ring housing, alloy powder is filled among the aluminum-silicon alloy wires, the brazing aluminium soldering ring housing and the aluminum-silicon alloy wires respectively comprise the following chemical components in percent by weight: not more than 3 percent of Si, not more than 20 percent of Cu, not more than 98 percent of Zn, not more than 0.01 percent of Mn, not more than 5 percent of Ag, not more than 3 percent of Ni and the balance of Al; and the alloy powder comprises eutectics of KAlF4 and K3AlF6 or eutectics of KAlF4 and K3AlF6 and silicon powder and accounts for 15-30 percent of the total weight of the brazing aluminium soldering ring. The brazing aluminium soldering ring has the advantages of being small in activating temperature range of a brazing agent, improving wettability and flowability of brazing materials, saving soldering time, being free of cleaning after welding, according with the requirement of ROHS (Restriction of the use of certain Hazardous Substances) environment protection, and being excellent in anti-corrosion property, high in heat conduction and electricity conduction properties and excellent in processability.

Description

technical field [0001] The invention relates to a welding technology, in particular to a brazing aluminum welding ring for welding aluminum or aluminum alloy products and a preparation method thereof. Background technique [0002] With the rapid development of the refrigeration industry, aluminum refrigeration accessories, especially the brazing of aluminum or aluminum alloy products, are more and more widely used. The brazing of aluminum alloys usually uses aluminum alloy brazing filler metals. Since there is a dense oxide film on the surface of aluminum alloys, flux must be added during brazing. At present, fluxes are added manually when brazing aluminum alloy pipe joints, and brazing often occurs. The phenomenon of adding too much or uneven addition of flux, on the one hand, causes waste of flux, and on the other hand, too much residue is difficult to clean. When the residue after brazing is soaked and removed with an acid mixture, it often leads to aluminum products. Co...

AI Technical Summary

Problems solved by technology

The brazing of aluminum alloys usually uses aluminum alloy brazing filler metals. Since there is a dense oxide film on the surface of aluminum alloys, flux must be added during brazing. At present, fluxes are added manually when brazing aluminum alloy pipe joints, and brazing often occurs. The phenomenon of adding too much or uneven addition of flux, on the one hand, causes waste of flux, and on the other hand, too much residue is difficult to clean. When the residue after brazing is soaked and removed with an acid mixture, it often leads to aluminum products. Corrosion, leakage during use, and poor thermal and electrical conductivity

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