High-strength aluminum alloy brazing sheet, and method of manufacturing such sheet

摘要

A high strength aluminum alloy brazing sheet has a core material composed of an aluminum alloy, and a filler material cladded on at least one surface of the core material and composed of an Al/Si-based alloy, the core material being the aluminum alloy which contains Si falling within a range of 0.05-1.2 mass %, Fe falling a range of 0.05-1.0 mass %, Cu falling within a range of 0.05-1.2 mass %, and Mn falling within a range of 0.6-1.8 mass %, and which is composed of the balance Al and the inevitable impurities, the filler material being the aluminum alloy which contains Si falling within a range of 2.5-13.0 mass %, and Fe falling within a range of 0.05-1.0 mass %, and which is composed of the balance Al and the inevitable impurities, an area percentage, at which an arbitrary cross-section of the core material before a brazing process is occupied with intermetallic compounds having a size falling within a range of 0.2-.0.5 µm, being at most 5 %, a solid solution amount of Mn being at least 0.2 mass % in the core material after the brazing process. Also, there is provided a method of manufacturing such an aluminum alloy brazing sheet.