Abstract
Brazing of stainless steel to various aluminium alloys had been carried out using Al - Si filler and flux in air. The brazing properties changed remarkably with kinds of aluminium alloy. Also in the aluminium alloy of the same kind, brazing property changed remarkably by the change of a slight temperature. It was considered that these phenomena are due to the composition of base metals and the filler metal, the difference in the surface structure, and also the melting and solidification behavior by the reaction between the aluminium alloy base metal and the filler.