Aluminum soldering paste

Abstract

The invention discloses an aluminum-based alloy soldering paste suitable for an aluminum-stainless steel and aluminum-aluminum alloy soldering connection batch production technology aiming at the requirement of high-efficiency soldering technology. The soldering paste consists of the following components by weight percent: 1) 50-65% of aluminum-based alloy soldering material powder, 2) 10-25% of fluoroaluminate soldering flux, 3) 3-10% of tackifier, 4) 2-10% of thickening agent, 5) 10-30% of organic solvent, and 6) 0.05-0.50% of stabilizing agent. The soldering paste provided by the invention has moderate viscosity and soldering flux which is in accurate proportion, and is extremely suitable for workpieces with irregular weld joint shapes and complex structures; the soldering paste can be very simply and conveniently coated on the part of a welding element, which is required for soldering joint; working procedures such as auxiliary positioning, soldering flux coating and brushing are not required like plate-shaped or silk-shaped soldering materials; the soldering production technology is simplified; the labor cost is lowered; and the product quality and production efficiency are improved.

Description

technical field [0001] The invention relates to a brazing material, in particular to an aluminum solder paste formula for brazing of aluminum-aluminum alloy and aluminum-stainless steel. Background technique [0002] With the diversification of the structure of the brazing workpiece and the complexity of the shape of the weld, especially the irregular and dense workpieces bring great difficulties to the dispensing or fixing of the solder. Traditional solder, such as welding wire and solder sheet For brazing material, it is necessary to fix the brazing material in advance by spot welding or clamping before welding, and then brush the flux, which will greatly affect the production efficiency, especially for complex and dense welds. It is impossible to fix the solder by the above method. Contents of the invention [0003] The object of the present invention is to provide a kind of creamy solder-aluminum brazing paste containing flux, which is suitable for processes such as f...

AI Technical Summary

Problems solved by technology

[0002] With the diversification of the structure of the brazing workpiece and the complexity of the shape of the weld, especially the irregular and dense workpieces bring great difficulties to the dispensing or fixing of the solder. Traditional solder, such as welding wire and solder sheet For brazing materials, spot welding or clamping method should be used to pre-fix the brazing material before welding, and then brush the brazing flux, which will greatly affect the production efficiency, especially for complex and dense welds. It is impossible to fix the solder by the above method