HIGH-STRENGTH/HIGH-CONDUCTIVITY COPPER ALLOY HAVING EXCELLENT WORKABILITY, AND COPPER ALLOY MEMBER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a new copper alloy material in which strength, bending workability, press blanking properties, stress relaxation resistance and the anisotropy thereof are simultaneously improved to high levels while maintaining its high conductivity level of ≥70%IACS.;SOLUTION: The copper alloy has a composition comprising, by mass, 0.1 to 0.3% Fe, 0.05 to 0.3% Ni, 0.04 to 0.2% P and 0.03 to 0.15% Sn, and in which the total content of elements other than Cu and the above elements is ≤0.1%, and the balance Cu, and has a structure where, regarding crystal grains in the cross-section parallel to the rolling direction and the sheet thickness direction, the average aspect ratio (major axis/minor axis) A is ≥10, and the ratio between the maximum value A_max and the minimum value A_min of the aspect ratio, A_max/A_min is 1.0 to 3.0.;COPYRIGHT: (C)2007,JPO&INPIT