| 摘要 |
<p>A method of producing aluminum alloy heat-exchanger is disclosed, wherein, upon producing aluminum alloy heat-exchanger by soldering technique, it is retained for 10 minutes to 30 hours at 400 to 500 DEG 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 DEG C or lower after the finish of heating for soldering for 10 minutes to 30 hours at 400 to 500 DEG C and further it is preferable to cool at a cooling velocity of not slower than 30 DEG C/min across a temperature range from 200 DEG C to 400 DEG C after said reteinment. Excellent thermal efficiency, high strength and excellent corrosion resistance can be achieved. <IMAGE></p> |
