Alloy brazing filler metal of brazing-flux-free brazing foamed aluminum core veneer and preparation method thereof

Abstract

The invention discloses an alloy brazing filler metal of a brazing-flux-free brazing foamed aluminum core veneer and a preparation method of the alloy brazing filler metal, wherein the alloy brazing filler metal is an alloy material whose range of melting point is from 450 DEG C to 600 DEG C. Elements of Cu and Mg are added in an aluminum-silicon-based brazing flux to prepare the alloy material with better flowability and appropriate melting point as a brazing filler metal, the alloy brazing filler metal is good in flowability and low in melting point, the elements of Cu and Mg in a brazing filler metal body are dispersed towards a solid phase foamed aluminum end in the welding process and are wetted and spread out on the surface of a base metal to implement the connection of parts, no brazing flux is used in a matched way in the welding process, no vacuum or protection atmosphere condition is needed, a compact oxidation film is removed by using a mechanical / physical method in a matched way, and a compact welding line is formed during the welding to implement the high-strength welding of the foamed aluminum.

Description

technical field

[0001] The invention relates to the field of foamed aluminum material processing, in particular to an alloy brazing filler metal for soldering a foamed aluminum core plate without flux and a preparation method thereof. Background technique

[0002] Foamed aluminum material is a high-tech new material developed in recent years. It has many excellent properties such as sound absorption, sound insulation, heat insulation, electromagnetic shielding, vibration damping and buffering, etc. Toxicity, odorless, corrosion resistance, anti-aging and other properties.

[0003] Due to the use of a small amount of metal to realize the multi-functionalization of structural materials, it has opened up new ways to solve existing problems in many high-tech fields. cutting-edge hot materials. At present, the research on aluminum foam abroad is more in-depth, and it has been successfully applied to the fields of automobiles, construction, packaging, machine tools and so on. ...