In this study, the effect of laser shock peening and low-temperature vacuum carbonitriding on the tribological properties of 20Cr2Mn2Mo steel alloy was investigated. The original sample and samples treated by laser shock peening with different laser energy and number of impacts were carbonitrided in vacuum at 760 °C. The effect of laser shock peening parameters on surface roughness, microhardness, coefficient of friction, and wear properties was studied. The results indicated that the surface roughness and microhardness increase with respect to laser energy and number of impacts. For exceedingly high laser energy or number of impacts, the coefficient of friction evidently increases. Furthermore, laser shock peening and carbonitriding lead to high-density dislocations and second-phase particles. With increasing laser energy and number of impacts, the primary wear mechanism changes from abrasive wear to a mix of abrasive and adhesive wear.

本研究研究了激光冲击喷丸和低温真空碳氮共渗对20Cr2Mn2Mo钢合金摩擦学性能的影响。原始样品和通过不同能量和冲击次数的激光冲击喷丸处理的样品在760°C的真空中碳氮共渗。研究了激光冲击喷丸参数对表面粗糙度，显微硬度，摩擦系数和磨损性能的影响。结果表明，表面粗糙度和显微硬度随激光能量和冲击次数的增加而增加。对于极高的激光能量或冲击次数，摩擦系数明显增加。此外，激光冲击喷丸和碳氮共渗会导致高密度位错和第二相颗粒。随着激光能量和撞击次数的增加，