Microstructure and Phase Structure Analysis of a Self Lubrication Ni Base Alloy

In order to give priority to the improvement of the synthetic properties of S containing high temperature self lubrication Ni base alloy,and use this alloy for new high effective heat engine and advanced promotion system. The microstructure and phase structure of a S containing high temperature self lubrication Ni base alloy was analized using optical microscopy, scanning electron microscope(SEM), electron probe and X ray diffraction. This alloy is consisted of Ni base sosoloid containing elements Fe, Co, Cr and Mo, sulfide Cr 3S 4 and carbide (Mo 0.9 Cr 0.1 ) 2C.As the Cr 3S 4 is in large network distribution, the strength and impact toughness of this alloy is weaker, even the tribological property is fairly good.The performance of this alloy can be improved by means of adjusting the composition , preparation technique, heat treatment and processing.