A kind of preparation method of aluminum-silicon-copper solder

Abstract

The invention discloses a preparing method of aluminum silicon copper brazing filler metal. According to the method, firstly, aluminum silicon alloy and copper silicon alloy produced according to a conventional method are made into fine wires with the diameter being 0.1 to 0.2mm; the proportion of aluminum silicon wires and copper silicon wires is determined according to the required aluminum silicon copper brazing filler metal ingredient requirements; the selected aluminum silicon wires and the selected copper silicon wires are mixed and woven into round or flat stripped brazing filler metal ropes; the woven brazing metal ropes are made to meet the fineness requirement of the required finished product brazing filler metal through pulling / rolling; the processed fine brazing filler metal ropes are subjected to segmented laser scanning sintering fusion for forming uniform aluminum silicon copper brazing filler metal finished products. The preparing method has the advantages that the aluminum silicon alloy and the copper silicon alloy with better plasticity are processed into the fine wires in advance, then, a proper number of the aluminum silicon wires and the copper silicon wires are selected according to the ingredient requirement of the brazing filler metal, after the weaving and compact treatment, the laser sintering is carried out, the fine brazing filler metal forming is realized, and the technical problem of forming difficulty of the aluminum silicon copper brazing filler metal is solved, so the aluminum silicon copper brazing filler metal is widely applied to aluminum alloy brazing.

Description

technical field [0001] The invention relates to the processing of solder, in particular to a preparation method of aluminum-silicon-copper solder. Background technique [0002] Al-Si-Cu solder is close to Al-Si-Cu ternary eutectic alloy, has a low melting point and is easy to braze, and is widely used in the brazing of aluminum alloys. However, due to the high brittleness of this brazing filler metal, it is difficult to form, and it is difficult to process it into a filament shape or a thin sheet, and it is mostly used as a cast rod during brazing, which limits the further popularization and application of the brazing filler metal. Contents of the invention [0003] The object of the present invention is to provide a preparation method that can process Al-Si-Cu solder into filaments or thin sheets, so as to meet the requirements for using it for brazing workpieces. [0004] To achieve the above object, the present invention can take the following technical solutions: [...

AI Technical Summary

Problems solved by technology

However, due to the high brittleness of this brazing filler metal, it is difficult to form, and it is difficult to process it into a filament or thin sheet. It is mostly used as a cast rod during brazing, which limits the further popularization and application of this brazing filler metal.