Friction and Wear Properties of a Cr-Ni Alloy Prepared by Powder Metallurgy before and after Heat Treatment

A Cr-Ni alloy was prepared by powders metallurgy process (25 MPa cold isostatic pressing, 1 200 ℃×20 min sintering)and then was heat treated (1 259 ℃×1 h+1 080 ℃×1 h, furnace cooling), and its friction and wear properties before and after heat treatment were studied. The results show that the heat treatment could increase the friction and wear properties of the tested alloy and decrease the sensibility of friction coefficient temperature.