目的 研究非硫磷有机钼的摩擦学性能，以满足发动机润滑油低黏度化发展的需求。方法 实验室合成了一种新型不含硫磷元素的油溶性有机钼添加剂（SPFMo），并将其按照不同质量分数添加到0W20润滑油中，利用四球摩擦磨损试验机，详细分析了不同SPFMo添加量、温度、载荷和速度对SPFMo在0W20中摩擦学性能的影响，并采用3D激光共聚焦显微镜和扫描电子显微镜对磨痕形貌和成分进行分析。 结果 SPFMo具有优异的减摩抗磨性能，可以使0W20的摩擦系数和磨斑直径均减小，摩擦过程中Mo元素会发生富集，生成包含MoS2、MoO3等物质的摩擦化学反应膜，从而实现减摩、抗磨和自修复。确定了SPFMo在0W20中可以发挥良好摩擦学性能的添加量和使用温度区间分别为0.25%~0.5%和100~130 ℃，120 ℃时，0.5%SPFMo能够使0W20润滑油的COF降低27.5%，磨斑直径降低7.8%。0W20+0.5%SPFMo润滑油的COF，随着温度的升高先减小后增大，随着转速的增大而减小，随着载荷的增大而增大；0W20+0.5%SPFMo润滑油的磨斑直径，随着温度的升高先减小后增大，随着转速和载荷的增大而增大。结论 SPFMo的添加可有效提高润滑油的摩擦学性能，研究结果可为新型发动机低黏油润滑添加剂的设计和选择提供参考。

The aims to research tribological properties of non-thiophosphorous organic molybdenum, in order to meet the demand of the development of low viscosity lubricating oil of engine, a new kind of sulfur- and phosphorus-free organic molybdenum (SPFMo) was synthesized and added into the lubricating oil 0W20. Moreover, the influence of SPFMo content, temperature, load and rotation speed on the tribological performance of 0W20 was studied in detail. The results show that the SPFMo shows good anti-friction and anti-wear performances, both the COF and wear diameter of 0W20 can be decreased. During the friction process, the Mo is enriched and has the function of lubrication, anti-wear and self-repairing. MoS2 and MoO3 are generated by tribochemical reaction, which is the main part of the lubricating film. The SPFMo content and temperature in which the SPFMo can show great tribological performance is 0.25wt%~0.5wt% and 100~130 ℃, respectively. When the temperature is 120 ℃, the COF and wear diameter can be decreased by 27.5% and 7.8% by the addition of 0.5% SPFMo. The COF of 0W20+0.5%SPFMo decreases firstly and then increases with the increase of temperature, decreases with the increase of rotation speed and friction load. The wear diameter of 0W20+0.5%SPFMo decreases firstly and then increases with the increase of temperature, increases with the increase of rotation speed and friction load. Finally, the results can be helpful for designing and selecting new additives of engine oil with high low viscosity.