| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy excellent in blanking workability capable of sufficiently meeting the recent damand for making electrical and electronic equipment part highly integrated, compact, low-cost, etc., by incorporating specific amount of at least one element among Pb, Bi, Ca, Sr, Ba, and Te into Cu or a Cu alloy containing Cu and Zn, Zr, Sn, Ni, P, Fe, Cr, etc. SOLUTION: One or more elements among Pb, Bi, Ca, Sr, Ba, and Te are incorporated by 0.002-0.5wt.% into Cu or a Cu alloy. If necessary, 0.01-0.5% of one or more elements among Sn, Cr, Mg, Zr, Ni, Ag, and Mn and further incorporated. As the Cu alloy, alloys of Cu-Zn, Cu-Zr, Cu-Sn, Cu-Sn-Ni, Cu-Sn-Ni- P, Cu-Fe, Cu-Fe-P, Cu-Fe-Zn-P, Cu-Cr, Cu-Cr-Zr, etc., are suitably used. It is preferable to regulate the size of crystallized substances or precipitates and the size of crystalline grains to <=5μm and <30μm, respectively, by controlling working conditions for the Cu alloy of the above composition.
|
