COPPER ALLOY IMPROVED IN HOT AND COLD WORKABILITY, METHOD FOR PRODUCTION THEREOF, AND COPPER ALLOY STRIP OR ALLOY FOIL OBTAINED FROM COPPER ALLOY

摘要

PROBLEM TO BE SOLVED: To provide a Cu-Zr base copper ailloy having high strength, high electroconductivity, high elongation and excellent in hot workability and cold workability, and to provide a method for manufacturing the same and a copper alloy strip or a copper alloy foil for electronic/electric parts applying the Cu-Zr based on copper alloy.SOLUTION: The copper alloy in which the hot workability and the cold workability is improved contains, by mass, 0.01 to 0.28% of Zr and 0.0001 to 0.0012% of P as indispensable components, further contains three or more elements of 0.03 to 4% of Cr, 0.07 to 3% of Sn, 0.02 to 0.15% of Mg, 0.03 to 0.14% of Mn, 0.02 to 0.12% of Co, and 0.04 to 0.1% of Zn as additive components and the balance containg Cu with inevitable impurities.