本文研究了增氮降镍对奥氏体不锈钢耐颗粒冲蚀性能的影响，借助电子天平、超景深显微镜以及自动化喷砂设备，对试验钢的冲蚀磨损率以及冲蚀磨损后的表面形貌进行了表征与分析。结果表明：奥氏体不锈钢的磨损率随着冲蚀角度的增大，出现了先上升，后下降的趋势，当冲蚀角度为30°时，磨损率达到最大值；奥氏体不锈钢的冲蚀磨损率随着冲蚀速度的增加而增大，在冲蚀速度为7～9 m/s时达到材料破坏临界速度门槛值；随着冲蚀时间的延长而增大，在冲蚀时间6 h时冲蚀磨损增加率最大；增氮降镍对奥氏体不锈钢耐冲蚀磨损性能的规律没有影响，但是在相应的冲蚀条件下，均降低了材料的冲蚀磨损率。

Effects of increasing nitrogen and reducing nickel on solid particle erosion wear property of 316 austenitic stainless steels were studied. Erosion rate and the morphology of the tested steels after solid particle erosion were characterized and analyzed with electronic balance, super deep scene microscope and abrasion testing device. The results show that with the increase of impact angle, the erosion rate of the austenitic stainless steel appeared to a downward trend after rising first, the maximum of the erosion rate appeared in 30°. The erosion rate presented a rising trend with the increase of impact velocity as well as the impact time, the critical velocity threshold values of impact velocities were 7～9 m/s and the maximum slope of erosion rate of impact time was 6 h. Increasing nitrogen and reducing nickel had no effect for the discipline of the erosion rate of 316 austenitic stainless steels, but reduced the erosion rate under the same impact conditions.