Patent ID: 6436206
Filing Date: 2002-08-20
Classification: C22C,C22F

Abstract:
Process for preparing copper base alloys which comprises: casting a copper base alloy consisting essentially of tin in an amount greater than about 1.5 wt. % up to 4.0 wt. %, phosphorous from 0.01 to 0.20 wt. %, iron from 0.01 to 0.80 wt. %, zinc in an amount greater than 1.0 wt. % up to 8.0 wt. %, and the balance essentially copper; homogenizing at least once for at least one hour at from 1000-1450Â° F.; rolling to final gauge including at least one process anneal for at least one hour at 650-1200Â° F. followed by slow cooling at a rate in the range of 20Â° F.-200Â° F./hour; and stress relief annealing at final gauge for at least one hour at 300-600Â° F., thereby obtaining a copper alloy including phosphide particles uniformly distributed throughout the matrix of said copper base alloy.