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对10Ni3MnCuAl钢磨削表面进行不同强度的喷丸强化处理,分析了喷丸强化后10Ni3MnCuAl钢的金相组织及喷丸表层下微观结构的变化,测量了喷丸影响层的显微硬度以及喷丸强化所形成的残余压应力场,研究了喷丸所造成显微硬度、金相组织和表面残余应力等表面完整变化。结果表明,喷丸强化可显著改善10Ni3MnCuAl钢表面完整性及其疲劳寿命。喷丸强度高时将产生过喷效应,导致疲劳寿命的降低,实验测得最佳喷丸强化弧高值为0.40mm时表面质量最好,喷丸影响层的残余应力深度达450μm。
The surface of 10Ni3MnCuAl steel was subjected to shot peening with different intensities. The microstructure of 10Ni3MnCuAl steel after shot peening and the microstructure of shot peening were analyzed. The effects of shot peening on microhardness and shot peening The formed residual compressive stress field is strengthened and the complete surface changes of microhardness, microstructure and surface residual stress caused by shot peening are studied. The results show that shot peening can significantly improve the surface integrity and fatigue life of 10Ni3MnCuAl steel. When the shot peening intensity is high, the over-spraying effect will be produced, resulting in the decrease of the fatigue life. The best peening test results show that the best surface quality is obtained when the shot peening height is 0.40mm, and the residual stress depth of shot peening layer reaches 450μm.