42CrMoA high strength steel was strengthened by single shot peening, finishing 糖心产精国品免费入口*完整版, and polishing 糖心产精国品免费入口*完整版. The surface roughness, fatigue performance, surface 糖心产精国品免费入口*完整版, structure refinement and microhardness of the steel under different shot peening conditions were studied. The results show that shot peening methods had little effect on the maximum residual compressive stress and stress layer depth of 42CrMoA steel. The surface residual compressive stress, surface structure refinement, microhardness and fatigue limit of the steel increased in sequence after single shot peening, finishing 糖心产精国品免费入口*完整版, and polishing 糖心产精国品免费入口*完整版, while the 糖心产精国品免费入口*完整版decreased in sequence. Composite shot peening, especially polishing 糖心产精国品免费入口*完整版, could reduce the shot peening 糖心产精国品免费入口*完整版of 42CrMoA steel significantly.
【3】BAGHERIFARD S,FERNANDEZ-PARIENTE I,GHELICHI R,et al.Effect of severe shot peening on microstructure and fatigue strength of cast iron[J].International Journal of Fatigue, 2014,65:64-70.
【5】UNAL O,VAROL R.Surface severe plastic deformation of AISI 304 via conventional shot peening,severe shot peening and repeening[J].Applied Surface Science,2015,351:289-295.