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研究了３８ＣｒＭｏＡｌ、４０Ｃｒ 和灰口铸铁的离子渗氮层的冲蚀性能及破坏机理。讨论了材料的冲蚀与时间、攻角、速度和材料硬度的关系；离子渗氮层的冲蚀破坏机理；材料离子渗氮层呈现微切削和疲劳剥落，有脆性断裂特征，属于应力疲劳断裂；离子渗氮层在冲蚀破坏中可能首先在过渡层产生裂纹。
The erosion properties and failure mechanism of ion nitriding layer of 38CrMoAl, 40Cr and gray cast iron were studied. The relation between erosion and time, angle of attack, velocity and material hardness was discussed. The erosion mechanism of ion nitrided layer was eroded. The material ion nitrided layer showed micro-cutting and fatigue-spalling and brittle fracture, belonging to stress fatigue fracture ; Ion nitrided layer in the erosion damage may first crack in the transition layer.