| 摘要 |
PURPOSE:To produce a heat exchanger made of aluminum alloy capable of improving the heat efficiency and strength of a heat exchanger prepared by a brazing process. CONSTITUTION:At the time of producing a heat exchanger made of aluminum alloy by a brazing process, the heat exchanger made of aluminum alloy is produced by performing, in the course of cooling after the completion of brazing heating, holding at 400-500 deg.C for 10min-30hr and applying cooling through the temp. region between 200 and <400 deg.C at >=30 deg.C/min cooling rate and further applying ageing treatment at 120-220 deg.C for 30min-48hr. |
