| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy having excellent heat resistance whose strength is hardly deteriorated even when being subjected to heat treatment such as stress relieving annealing, and to provide its production method. SOLUTION: The copper alloy having excellent heat resistance comprises Fe, and in which the orientation density in Cube orientation after annealing at 500°C for 1 min is≤50%, and also the average crystal grain size after further annealing at 500°C for 1 min is≤30μm. The copper alloy can be produced in such a manner that, when an Fe-containing copper alloy is subjected to hot rolling, and is thereafter subjected to cold rolling to produce a cold rolled copper alloy, between the hot rolling and final cold rolling, cold rolling and annealing are performed for at least two times, further, the cold rolling per time is performed at a working ratio of 50 to 80%, and the working ratio at the time of the final cold rolling is controlled to 30 to 85%. COPYRIGHT: (C)2005,JPO&NCIPI
|
