分析了石英和煤两种磨料条件下,低合金钢冲击磨料磨损试样的磨面、磨屑和亚表层,确定了冲击磨料磨损中的疲劳磨损机制.根据疲劳磨损的特征提出凿坑变形疲劳磨损和积累变形疲劳磨损两种类型,并从冲击应力作用、变形硬化、疲劳裂纹形成和扩展、疲劳剥落形成磨屑几个方面分析了疲劳磨损的过程.联系材料性能提出疲劳磨损的判据. The wear surface, wear debris and subsurface of the low alloy steel impact abrasive wear specimen were analyzed under both quartz and coal abrasive conditions, and the fatigue wear mechanism of the impact abrasive wear was determined. According to the characteristics of fatigue wear, Wear and accumulation of deformation fatigue wear two types, and from the impact of stress, deformation hardening, the formation and expansion of fatigue crack formation, the formation of wear debris fatigue spalling several aspects of the analysis of the process of fatigue wear. Contact material properties proposed fatigue wear criteria.