| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy exhibiting high strength, high conductivity and excellent flexure processability and excellent stress relaxation resistance than conventional ones.SOLUTION: There is provided a copper alloy containing, Cr:0.15 to 0.4%, Si:0.01 to 0.1% and at least one element selected from a group consisting of Ti and Zr of total 0.005 to 0.15% and the balance copper with inevitable impurities and having average particle diameter of particle size distribution of a deposit measured by an X ray small angle scattering method of 2.0 nm to 7.0 nm and standardized dispersion of the particle size distribution in a range of 30 to 40%.SELECTED DRAWING: None |
