Patent ID: 7387844
Filing Date: 2008-06-17
Classification: B23K,B32B,C22C,F28D,F28F,Y10T

Abstract:
1. An aluminum alloy composite material for brazing, comprising: a core material; a brazing material formed of an Al—Si based aluminum alloy on one surface of the core material; and a cladding material formed on the other surface of the core material, each of the core material, the brazing material and the cladding material having a plate shape of roughly fixed thickness, the cladding material having a cladding ratio of 6 to 30% with respect to an entire thickness of the aluminum alloy composite material, the core material having a composition consisting essentially of 0.2 mass % or less of Mg, 0.02 to 0.3 mass % of Cr, 0.2 mass % or less of Fe, 0.2 to 1.0 mass % of Cu, 0.05 to 1.3 mass % of Si, 0.3 to 1.8 mass % of Mn, and 0.02 to 0.3 mass % of Ti in such a manner that a total content of Cu and Si is in a range of 2.0 mass % or less and a remainder of Al and unavoidable impurities, and the cladding material containing 2 to 9 mass % of Zn; at least one selected from the group consisting of 0.3 to 1.8 mass % of Mn and 0.04 to 1.2 mass % of Si; at least one selected from the group consisting of 0.02 to 0.25 mass % of Fe, 0.01 to 0.30 mass % of Cr, and 0.001 to 0.15 mass % of Cu; and a remainder of AI and unavoidable impurities.