COPPER ALLOY HAVING HIGH STRENGTH AND HIGH ELECTRIC CONDUCTIVITY

摘要

PROBLEM TO BE SOLVED: To obtain a Cu-Fe-P based copper alloy, while maintaining characteristics such as high strength, high electric conductivity and bending workability, having improved shearing workability in press blanking or the like, concretely, having a reduced shearing ratio in the cut face (the area of the sheared face/the area of the whole of the cut face). SOLUTION: The copper alloy has a composition comprising, by mass, 0.01 to 0.5% Fe, 0.01 to 0.3% P and at least one kind of element selected from Mg, Si, Cr, Ti, Zr and Al by 0.001 to 0.1%, and in which Fe/P as the mass ratio of Fe to P is 0.5 to 6.0, and the balance Cu with inevitable impurities. In the structure of the copper alloy, grains essentially consisting of the oxide of at least one kind selected from Mg, Si, Cr, Ti and Al are contained, and, among them, the distribution density of the grains with the major axis of≥0.1μm is 0.1 to 100 piece/100μm2, and also, the distribution density of the grains with the major axis of >10μm is≤0.001 piece/100μm2. COPYRIGHT: (C)2006,JPO&NCIPI