PRECIPITATION HARDENING COPPER ALLOY HAVING EXCELLENT SOFTENING PROPERTY

摘要

PURPOSE: To obtain a precipitation hardening copper alloy in which softening properties have remarkably been improved and the deterioration inn high temp. hardness is suppressed and having excellent softening properties by combining the advantages and disadvantages of a precipitation hardening copper alloy and alumina dispersed copper. ;CONSTITUTION: This precipitation hardening copper alloy having excellent softening properties is obtd. by uniformly dispersing 0.1 to 3.0wt.% alumina into the conventional precipitation hardening copper alloy. Concerning the amt. of alumina to be added, in the case of 0.1%, not only the dispersion of alumina is made ununiform, but also the effect of the addition is hardly recognized, and, in the case of 3.0%, also, the rise of the softening temp. is hardely recognized and, instead, its high temp. elongation and thermal conductivity deteriorate and the dispersion of alumina is made ununiform to lose the uniformity of the material. This precipitation hardening copper alloy having high softening properties is produced by a hot extruding method or a hot forging method.;COPYRIGHT: (C)1994,JPO