MANUFACTURE OF COPPER ALLOY HAVING HIGH STRENGTH AND ELECTRIC CONDUCTIVITY

摘要

PURPOSE:To manufacture a Cu alloy having high strength and electric conductivity without carrying out hot rolling by continuously casting a Cu alloy ingot contg. specified percentages of Ni and Si and by subjecting the ingot to cold rolling and heat treatment under specified conditions. CONSTITUTION:A Cu alloy ingot consisting of 0.4-4.0wt% Ni, 0.1-1.0wt% Si and the balance Cu with inevitable impurities is manufactured by continuous casting. The ingot is cold rolled at 40-95% draft and heat treated at 350-700 deg.C for 30sec-10hr in a reducing or inert atmosphere to obtain a Cu alloy having high strength and electric conductivity. A material of a desired thickness having desired hardness and elongation is obtd. by further subjecting the Cu alloy to proper cold working and heat treatment as required.