Patent ID: 6689232
Filing Date: 2004-02-10
Classification: C22C,C22F

Abstract:
A process for forming a copper base alloy having an electrical conductivity of at least 90% IACS and a tensile strength of 80 ksi comprising the steps of:casting an alloy consisting essentially of magnesium in an amount from about 0.1 to about 0.25% by weight, phosphorous in an amount from about 0.01 to about 0.2% by weight, silver in an amount from about 0.001 to about 0.1% by weight, iron in an amount from about 0.01 to about 0.25% by weight, and the balance copper and inevitable impurities with a ratio of magnesium to phosphorous. Mg:P, of at least 1.0; and thermally treating said cast alloy to form magnesium phosphide particles in the range of about 500 to about 2000 Angstroms and to form coarse iron phosphide particles in the range of from about 1000 to about 2000 Angstroms and finer iron phosphide particles in the range of from about 250 to about 600 Angstroms.