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研究了不同热处理工艺和磨损冲击功对变质Ｍｎ８钢耐磨性的影响。结果表明，在相同的热处理工艺条件下，变质Ｍｎ８钢的耐磨性随磨损冲击功的增大呈先增后减的规律，在１Ｊ磨损冲击功处出现耐磨性峰值；在１Ｊ磨损冲击功条件下，变质Ｍｎ８钢的耐磨性以弥散处理时最好，固溶处理时次之，时效处理时最差，且耐磨性随时效温度的提高而降低；在０．５Ｊ、１Ｊ和２Ｊ磨损冲击功时，变质Ｍｎ８钢的主要磨损机制分别为显微切削＋凿坑变形、显微切削＋浅小凿坑＋轻微剥落、累积变形疲劳剥落；最佳耐磨性时的磨损机制为显微切削＋浅小凿坑＋轻微剥落
The effects of different heat treatment processes and wear impact energy on the wear resistance of deteriorated Mn8 steel were studied. The results show that under the same heat treatment conditions, the wear resistance of deteriorated Mn8 steel first increases and then decreases with the increase of the impact energy, and the wear resistance peak appears at 1J wear impact energy. At 1J wear impact energy Under the conditions, the wear resistance of deteriorated Mn8 steel was the best when dispersed, followed by solution treatment followed by aging treatment, and the wear resistance decreased with the increase of aging temperature. At 0.5J, 1J and 2J At the time of wear impact energy, the main wear mechanisms of deteriorated Mn8 steel were micro-cutting + chisel deforming, micro-cutting + shallow chiseling + slight peeling off, cumulative deformation and fatigue spalling, respectively; Micro-cutting + shallow chisel hole + slight peeling