Influence of Heat treatment on Tribological Behavior of Zn-Al Alloys

Abstract

The effects of heat treatment on the microstructure, hardness, tensile properties and tribological behavior of ZA-27 alloys in conditions of dry sliding were examined. The heat treatment of samples consisted of heating up to370 oC for 3 or 5 hours, and quenching in water. The temperature selected for solutionizing was. The heat treatment of ZA-27 alloys influences microstructure changes, decreasing of strength and hardness, but causes increasing of elongation. The rates of changes increase with increasing solutionizing duration. On the other hand, tribological tests results show that heat treatment of castings has a significant influence on improvement of their tribological properties. There, heat-treated samples casted in steel molds attained and even exceeded tribological antifriction and wear resistance behavior of sand casted samples.