In this paper, the X210CrW12 steel was subjected to gas nitriding to obtain a complex phase compound layer with limited porosity. The nitrided layer was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The fretting wear behavior and the evolution of fretting wear damage of the compound layer were studied, and the worn surfaces were characterized by SEM/EDS and 3D optical profilometry. The results indicated that the compound layer showed superior fretting wear resistance and sufficient load-carrying capacity in the low loading case of 35 N, but the fracture of coarse nitrides (transformed primary carbides) was obviously detrimental to wear resistance. For the high loading case of 70 N, the low toughness of the compound layer led to the occurrence of brittle cracks, and the decrease in the thickness of the compound layer due to wear resulted in the cracking and spalling of the compound layer.

中文翻译：

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氮化高碳高铬钢复合相复合层微动磨损损伤的演变

本文对X210CrW12钢进行了气体氮化处理，从而获得了孔隙率有限的复合相化合物层。氮化层通过扫描电子显微镜（SEM），能量色散谱（EDS）和X射线衍射（XRD）表征。研究了复合层的微动磨损行为和微动磨损损伤的演变，并通过SEM / EDS和3D光学轮廓仪表征了磨损表面。结果表明，在35 N的低负荷情况下，复合层具有优良的抗微动磨损性能和足够的承载能力，但粗大氮化物（相变的初生碳化物）的断裂明显不利于耐磨性。对于70 N的高载荷情况，复合层的低韧性导致出现脆性裂纹，