MULTILAYER ALUMINIUM BRAZING SHEET FOR FLUXFREE BRAZING IN CONTROLLED ATMOSPHERE.

摘要

An aluminium brazing sheet comprising an aluminium alloy core material covered by an interlayer and an Al-Si braze alloy is disclosed. The interlayer consists of an aluminium alloy comprising ≤1.0% Si and 0.1-2.5 % Mg. The Al-Si braze alloy comprises 5-14% Si and 0.01-1.0% Bi. The core material and the interlayer has a higher melting temperature than the braze alloy.