A process for the improvement of the creep resistance and the relaxation of tensions of springs of copper alloys.

摘要

Process for improving creep strength and resistance to stress degradation of Cu alloys contg. 2-12 (2-10)% Al or 2-6 (3-5)% Ge or 2-10 (3-8)% Ga or 3-12 (4-10)% In or 1-5 (1.5-4)% Si or 4-12 (4-10)% Sn or 8-37 (15-37)% Zn, bal. Cu, comprises (a) cold-working by 10-97 (15-95)%, (b) deforming, (c) heating for =1 (=15) mins. to 200-360 (220-350) degrees C and (d) cooling to room temp. The alloy is useful for prodn. of electric plugs. Strength is unimpaired by the treatment.