SURFACE ROUGHNESS AND SURFACE RESIDUAL STRESS OF HIGH MANGANESE STEEL AFTER DIFFERENT SHOT PEENING PROCESSES

摘要

Compressive residual stress induced by shot peening can effectively improve fatigue resistance of the treated component, so much attention has been paid to increase the value of compressive residual stress. Also, surface roughness was changed by shot peening, which was very important for improving the fatigue resistance. Surface roughness and compressive residual stress for high manganese steel component treated by different shot peening processes were investigated. The results reveal that the change process of surface roughness can be divided into two stages with the shot peening process lasting, that is: stable stage and increasing stage. The highest compressive residual stress was obtained when the shot peening process lasted 5 minutes.