| 摘要 |
PROBLEM TO BE SOLVED: To obtain a copper alloy excellent in characteristics such as strength, electric conductivity, solderability, plating properties or the like required as those of a copper alloy for electrical and electronic parts and simultaneously excellent in shearing workability. SOLUTION: This copper alloy is the one having a compsn. contg., by weight, 0.05 to 3.5% Fe and 0.01 to 1.0% P, in which the content of 0 is regulated to <=300ppm, and the balance substantial Cu with inevitable impurities, and one or >= two among Fe, Cu-Fe compounds ad Fe-P compounds are precipitated (and crystallized out). In this case, the grains having <0.02μm grain size (small grains) and the grains having 0.02 to 100μm (large grains) are present, and the ratio of the number of the small grains/large grains is regulated to >=1. From the viewpoint of improving its shearing workability, the ratio of the grain diameter (the median in both cases) is preferably regulated to <=0.5.
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