Tribological property of high-strength steel work-piece subject to high speed machining strengthening (HSMS) surface modification

Distribution of residual stress and width at half height were measured by means of X-ray diffractometer and SEM. Tribological property of high strength steel work-piece subject to HSMS surface modification were investigated. The influence of strengthening characteristic index on tribological properties were discussed. Optimized HSM process effectively improvd the sliding friction performance of machined surfaces. The depth of compressive residual stress profile was a critical value for the tribological properties of machined surfaces. The dislocation gathering and grain refining improved the wear-resisting property of machined surfaces. The wear mechanism of machined surfaces subject to HSMS surface modification were grain-abrasion wear, rheologic wear, and fatigue wear.