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研究了20Ni4Mo钢和55SiMoV摩擦副在高接触应力无润滑条件下,不同的表面渗碳含量、淬火温度和表面硬度对耐磨性的影响。正交试验优化最佳热处理性能的匹配,通过电镜和能谱分析了微观组织、磨屑形貌及磨损机理。结果表明,影响磨损量的主要因素为20Ni4Mo表面碳含量、55SiMoV及20Ni4Mo的硬度。最佳耐磨性的热处理指标匹配为:20Ni4Mo表面碳含量为0.85%,表面硬度为60～61HRC;55SiMoV表面碳含量为0.95%,表面硬度为59～61HRC。
The effects of carburizing content, quenching temperature and surface hardness on the wear resistance of 20Ni4Mo steel and 55SiMoV friction pair under high contact stress and non-lubrication conditions were studied. Orthogonal experiments were performed to optimize the matching of the best heat treatment properties. The microstructure, wear debris morphology and wear mechanism were analyzed by electron microscope and energy spectrum. The results show that the main factors affecting the wear amount of 20Ni4Mo surface carbon content, 55SiMoV and 20Ni4Mo hardness. The best index of wear resistance heat treatment match: 20Ni4Mo surface carbon content of 0.85%, the surface hardness of 60 ~ 61HRC; 55SiMoV surface carbon content of 0.95%, the surface hardness of 59 ~ 61HRC.