Brazing method of aluminum alloy

Abstract

Abstract PURPOSE:To execute brazing at a low cost by using a fluoro-aluminum-potassium salt for a flux in a nitrogen atmosphere in the stage of joining a brazing sheet clad with an Al-Si alloy brazing filler metal to a blank Al alloy clad with a Zn-Al alloy. CONSTITUTION:The fluoro-aluminum-potassium salt is sprayed as the flux to the blank material formed by cladding the Zn-Al or Al-Zn alloy 1 having about several mu - several 10mu thickness to the surface layer of the Al alloy 2 and the brazing sheet 3 formed by cladding the Al-Si alloy brazing filler metal 5 to an Al alloy core material and the brazing is executed in the nitrogen atmosphere in the stage of joining said sheet to said blank material. The brazed part provided with the corrosion resistance occurring in the Zn-diffused layer is thus obtd. on the surface of the Al alloy blank material.

Inventors

• 👤 Takeshi Hattori
• 👤 武 服部

Bibliographic Details