| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy composite material for heat exchangers which has excellent corrosion resistance even when the thickness is reduced. SOLUTION: The aluminum alloy composite material for heat exchangers has a sacrificial material layer, a core material layer and a brazing filler metal layer. In this aluminum alloy composite material for heat exchangers, the sacrificial material layer has a composition consisting of 0.5 to 5 mass% ZnO and the balance Al with inevitable impurities, and at least one layer among the sacrificial material layer, the core material layer and the brazing filler metal layer contains 0.05 to 0.4 mass% V. Further, the above at least one layer has a structure in which first solid-solution phases having high V concentration and second solid-solution phases having low V concentration are alternately laminated in the sheet thickness direction of the composite material, and a spacing between the first phases in the direction of lamination in the structure ranges from 4μm to 15μm. COPYRIGHT: (C)2008,JPO&INPIT |
