| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cu-Cr-Zr based copper alloy material which has excellent fatigue and intermediate temperature properties. SOLUTION: In the high strength and high conductivity copper alloy comprising, by mass, 0.05 to 1.0% Cr and 0.05 to 0.25% Zr, and the balance Cu with inevitable impurities or the high strength and high conductivity copper alloy comprising 0.05 to 1.0% Cr, 0.05 to 0.25% Zr, and 0.05 to 2.0% Zn, and the balance Cu with inevitable impurities, Zr or Cu-Zr based inclusions with a diameter of≥0.1μm including≥10% S as one of the inevitable impurities are present by one or more pieces/mm<SP>2</SP>. COPYRIGHT: (C)2004,JPO&NCIPI
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