Brass-contained silver-free brazing alloy

Abstract

The invention relates to a brass-contained silver-free brazing alloy. The brass-contained silver-free brazing alloy comprises the following raw materials, by weight percent, 50%-60% of Cu, 0.4%-1% of Sn, 0.2%-0.5% of Si, 0.5%-4% of Bi, 0.4%-1% of Ti, 0.03%-0.06% of Ge and the balance Ni, Zn, Mn and rear earth elements. The brass-contained silver-free brazing alloy can replace silver brazing to weld hard alloy products, the melting point of traditional copper-contained brazing is lowered, activity is high, the cost is low, and annealing and cracks are not prone to occur.

Description

technical field [0001] The invention relates to a solder alloy, in particular to a brass-containing silver-free solder alloy. Background technique [0002] Traditional brazing mostly uses silver-containing solder, and the production cost of silver-containing solder is high. In order to reduce costs, other metals will be used instead of silver, while brass-containing solder has a higher melting point and is easy to anneal. , prone to cracks, affecting product use. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the high cost of the traditional silver-containing solder in the prior art, but the brass-containing solder has a high melting point, is easy to anneal, and is prone to cracks after brazing, and provides a brass-containing solder silver-free solder alloys. [0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a brass-containing silver-f...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the high cost of the traditional silver-containing solder in the prior art, but the brass-containing solder has a high melting point, is easy to anneal, and is prone to cracks after brazing, and provides a brass-containing solder silver-free solder alloy