中文摘要：

采用激光冲击强化改善304不锈钢耐磨性能。利用电子背散射衍射（EBSD）、显微硬度和球磨实验分析了激光冲击前后试样的微观组织和性能,探讨了激光冲击对其磨损性能的影响机理。结果表明,激光冲击304不锈钢后,其比磨损率下降,显微硬度从200 HV提高到260 HV。这是由于激光冲击强化304不锈钢使得材料表层晶粒碎化和大量亚结构形成,同时诱发马氏体相变的共同作用下,提高了304不锈钢的显微硬度,改善了其耐磨性能。

英文摘要：

In order to improve the wear performance of 304 stainless steel, a method of laser shock processing （LSP） was put forward. The microstructure and performances of 304 stainless steel which are treated with and without laser shock peening were examined by electron backscattering diffraction（EBSD）, microhardness and the ball milling experiment, the wear mechanism of 304 stainless steel produced by laser shock peening was discussed. The result shows that the wear rate of samples is decreases and microhardness is increased from 200 HV in primitive state to 260 HV which is treated by LSP. Under the action of grain fragmentation, a large number of sub structure formation at surface and the martensitic phase transformation, the microhardness and wear resistance of 304 stainless steel are improved.