Patent ID: 6679956
Filing Date: 2004-01-20
Classification: C22C,C22F

Abstract:
A process for making a copper base alloy which comprises the steps of:casting a copper base alloy containing tin, zinc, iron and phosphorous; forming phosphide particles uniformly distributed throughout the matrix of said alloy; said forming step comprising homogenizing said alloy at least once for at least one hour at a temperature from 1000 to 1450Â° F., rolling to final gauge including at least one process anneal for at least one hour at 650 to 1200Â° F. followed by slow cooling, and stress relief annealing at final gauge for at least one hour at 300 to 600Â° F.; wherein said phosphide particle forming step comprises forming phosphide particles having a finer component having a particle size in the range of from about 50 to 250 Angstroms and a coarser component having a particle size from 0.075 microns to 0.5 microns.