| 摘要 |
PROBLEM TO BE SOLVED: To provide a fin material for a heat exchanger having superior erosion resistance in brazing, a high strength and a capability to be thinned. SOLUTION: The fin material has a composition comprising more than 0.6% but less than 1.2% Si, 0.75 to 2.5% Mn, more than 1.0 to 5.0% Ni and the balance Al with unavoidable impurities. The manufacturing method comprises casting the Al alloy with the above composition, skipping homogenization treatment, soaking it at 400-480°C, hot-rolling it at a finishing temperature of 200-300°C, and cold-rolling it while conducting an intermediate annealing at least one time, at a total cold rolling reduction to the final sheet thickness in an amount of not less than 95%, and at the final cold rolling reduction from a sheet thickness in the final intermediate annealing to the final sheet thickness in an amount of 20-50%. COPYRIGHT: (C)2004,JPO
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