ALUMINUM ALLOY CLAD MATERIAL FOR HEAT EXCHANGER SUPERIOR IN BRAZING PROPERTY, CORROSION RESISTANCE AND HOT ROLLABILITY, AND METHOD FOR MANUFACTURING HEAT EXCHANGER BY USING THE ALUMINUM ALLOY CLAD MATERIAL THROUGH BRAZING

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy clad material for a heat exchanger, which inhibits Mg in a core material from diffusing to the surface of a brazing filler material in a brazing step, has adequate hot-clad-rollability even in a manufacturing step, does not cause the variation of a cladding rate, achieves high strength and excellent corrosion resistance, is joined by inert atmosphere brazing particularly with the use of a fluoride-based flux or a cesium-based flux, and is suitable for a tube material of an automotive heat exchanger made from an aluminum alloy.;SOLUTION: The aluminum alloy clad material is a four-layer clad material formed by cladding a sacrificial anode material 4 on one surface of the core material 3 and cladding the Al-Si brazing filler material 5 on the other surface through an intermediate material, wherein the core material is formed of an Al-Mn alloy, the intermediate material is formed of an aluminum alloy containing at least 0.8-1.8% Mn, and the sacrificial anode material is formed of an aluminum alloy containing at least 0.8-1.8% Mn and 0.5-10% Zn.;COPYRIGHT: (C)2006,JPO&NCIPI