提出激光冲击处理增强渗碳的组合方法，提高了12CrNi3A钢渗碳层的质量和耐磨性能。采用球磨实验分析了渗碳和激光冲击增强渗碳两种工艺下材料的耐磨性能，采用扫描电镜(SEM)研究了激光冲击增强渗碳对12CrNi3A材料微观组织的影响。结果表明，激光冲击渗碳试样的比磨损率为2.69×10-14 m3/Nm，比渗碳试样降低了29%。从摩擦系数和微观组织两个方面分析讨论了这种工艺方法提高12CrNi3A耐磨性能的机理。一方面，激光冲击增强渗碳使试样的摩擦系数降低了25%；另一方面，激光冲击渗碳试样表层形成了大量细小的碳化物颗粒，并呈梯度分布，从而提高了12CrNi3A钢材料的耐磨性能。

In order to improve the carburized layer quality and wear performance of 12CrNi3A-steel, a combined method of laser shock processing carburization is put forward. The wear performances of different samples which are directly carburized and carburized after laser shock processing are measured by the ball milling experiment. The microstructures of 12CrNi3A steel are examined by scanning electron microscope (SEM). The result shows that the wear rate of carburized after laser shock is 2.69×10-14 m3/Nm, reduced by 29% comparing with the samples carburized only. The mechanism of wear resistance improvement is discussed from two aspects. For one thing, the friction coefficient reduces by 25% after laser shock processing and carburization. For another, a large number of fine carbide particles on carburized layer are formed in the sample carburized after laser shock, and the surface carbide particles of 12CrNi3A steel are distributed in a gradient manner.