奥氏体不锈钢通过等离子氮碳共渗可显著提高其表面硬度,从而提高耐磨性而又不损害其抗腐蚀性能。本文采用光学显微镜、显微硬度和微磨损试验对经于450℃等离子氮碳共渗的AISI 316L不锈钢和所获得的渗层进行了表征。结果证明,等离子氮碳共渗层由氮化铬析出相和富氮奥氏体基体组成,其硬度约850 HV;渗层总深度平均约为45μm,且很均匀;渗层的耐磨性大大高于基体。 Austenitic stainless steel by plasma nitrocarburizing can significantly increase the surface hardness, thereby enhancing the wear resistance without compromising its corrosion resistance. In this paper, the AISI 316L stainless steel subjected to plasma nitrocarburizing at 450 ℃ and the obtained coating were characterized by optical microscope, microhardness test and micro-abrasion test. The results show that the plasma nitrocarburizing layer is composed of a chromium nitride precipitation phase and a nitrogen-rich austenite matrix with a hardness of about 850 HV; the total depth of the diffusion layer is about 45 μm on average, and is uniform; the wear resistance of the diffusion layer is greatly Higher than the substrate.