对13Cr4Mo4Ni4VA钢进行了真空渗碳、复合硬化及离子渗硫处理,制备了不同梯度结构的表面层.对不同工艺试件的摩擦磨损性能进行了对比研究,并对相应表面层的组织及磨损形貌进行观察分析,探索了不同工艺试件的抗磨减摩机理.结果表明:复合硬化13Cr4Mo4Ni4VA钢表面超硬(＞70HRC),组织优异,结构梯度分布,抗塑性变形能力强,具有优异的抗磨减摩性能；不同深度的离子渗硫层(基于渗碳层或复合硬化层)都具有良好自润滑性能,在多种机理综合作用下保持减摩效果,但过厚硫化物层会导致耐磨性降低.%Duplex hardening, vacuum carburizing and plasma sulfurizing of 13&4Mo4Ni4VA steel were carried out, and then the functionally gradient layers were prepared. Sliding wear experimental study was carried out for carburized, duplex hardened and sulfurized 13Cr4Mo4Ni4VA steel. The corresponding case microstructure and worn surface morphology were observed to explore the anti-friction and wear-resistance mechanism. The results show that the duplex hardening of 13Cr4Mo4Ni4VA steel leads to superior surface hardness ( >70HRC), good microstructure and gradient distribution , high level of resistance to plastic deformation, holding excellent antifriction and wear-resistance performance. All the plasma sulfurized layers (supported by carburized or duplex hardened layer) with different depth were of outstanding self-lubricating performance, and varied anti-friction mechanisms of sulfurized layer worked. However, too deeper sulfurized layer leads to inferior property of wear resistance.
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