Method of producing aluminum alloy heat-exchanger

Details Method of producing aluminum alloy heat-exchanger Method of producing aluminum alloy heat-exchanger

B - Operations, Transporting

21

D

B21D 53/02 (2006.01) B21C 37/22 (2006.01) B23P 15/26 (2006.01) C22F 1/04 (2006.01) C22F 1/043 (2006.01)

Patent

CA 2080865

ABSTRACT A method of producing aluminum alloy heat-exchanger is disclosed, wherein, upon producing aluminum alloy heat-exchanger by soldering technique, it is retrained for 10 minutes to 30 hours at 400 to 500°C after the finish of heating for soldering. It is better to retain the heat-exchanger during cooling after the finish of heating for soldering or the heat-exchanger cooled to 150°C or lower after the finish of heating for soldering for 10 minutes to 30 hours at 400 to 500°C and further it is preferable to cool at a cooling velocity of not slower than 30°C/min across a temperature range from 200-C to 400°C after said reteinment. Excellent thermal efficiency, high strength and excellent corrosion resistance can be achieved.

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