HIGH STRENGTH AND HIGH ELECTRICAL CONDUCTIVITY COPPER ALLOY HAVING EXCELLENT FATIGUE PROPERTY AND INTERMEDIATE TEMPERATURE PROPERTY

摘要

The present invention provides a Cu-Cr-Zr alloy material excellent in fatigue and intermediate temperature characteristics, which comprises 0.05 to 1.0% by mass of Cr and 0.05 to 0.25% by mass of Zr with a balance of Cu and inevitable impurities. The alloy comprises inclusion particles based on any one of Zr and a Cu-Zr alloy having a diameter of 0.1 mum or more, and the proportion of the inclusion particles containing 10% or more of sulfur as one of the inevitable impurities is one particle/mmSUP2/SUP.