ALUMINUM ALLOY MATERIAL FOR HEAT EXCHANGER, COMPOSITE MATERIAL FOR HEAT EXCHANGER USING THE ALUMINUM ALLOY MATERIAL AND PRODUCTION OF THE ALUMINUM ALLOY MATERIAL OR THE COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy material for a heat exchanger that the erosion of a brazer is suppressed at the time of brazing heating to have excellent corrosion-resistance and required strength. ;SOLUTION: This invention relates to a finish annealing material after the cold rolling of an Al alloy contg., by weight, 0.4 to 2.0% Fe, 0.3 to 2.0% Cu, 0.5 to 2.0% Mn, 0.03% (including 0%) Ti, and the balance Al with inevitable impurities, and the average grain size in the face rectangular to the rolling direction of the finish annealing material is 40 m. Since Fe, Cu and Mn are contained in suitable amount, strength required for a heat exchanger core can be obtd., and, furthermore, by controlling the recrystallized grain size in the face rectangular to the rolling direction of the Al alloy to 40 m, the Al alloy material is perfectly recrystallized at the time of brazing heating after its working into a refrigerant passage shaped body 1, and the erosion of a brazer can be suppressed. Moreover, by the incorporation of a suitable amt. of Ti, its corrosion resistance can be improved.;COPYRIGHT: (C)2000,JPO