Cu-Ni-Si BASED ALLOY HAVING EXCELLENT FATIGUE PROPERTY

摘要

PPROBLEM TO BE SOLVED: To improve the fatigue properties of a high strength copper alloy utilized for the electronic material of a connector or the like. PSOLUTION: The Cu-Ni-Si based alloy comprises, by mass, 1.0 to 4.5% Ni and 0.2 to 1.2% Si, and the balance Cu with inevitable impurities. The alloy has a surface in which a compressive residual stress of 20 to 200 MPa is present, and is excellent in fatigue properties. PCOPYRIGHT: (C)2005,JPO&NCIPI