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润滑油品的质量是决定现代科学技术和工业生产发展的重要因素之一，而改进润滑抽添加剂的性能并开发其复配技术则是提高油品质量的关键。硫化烯烃和二正丁基亚磷酸酯作为极压抗磨减摩添加剂已经广泛地应用于Ｓ－Ｐ型齿轮油中，两者复配使用可以产生协同效应也有一些研究报道，但还未见有关其协同作用机理方面深入系统的研究成果发表。因此，利用ＨＱ－１型摩擦磨损试验机考察了这两种常用的典型添加剂复配体系的润滑性能，并用微观分析测试手段考察了两者复配使用时的协同作用机理。结果表明，硫化烯烃与二正丁基亚磷酸酯复配使用时的最高无卡咬负荷有明显提高，并以Ｐ／Ｓ摩尔比为０．０２时的提高幅度最大，这归因于磨合效应的优化，反应膜与底材结合强度的提高，以及元素硫和磷与铁反应速度的最佳匹配；在一定的条件下，这种复配体系还能生成一种新的含磷化合物，并在摩擦表面形成含硫富磷的混合反应膜，硫和磷在膜中分别主要以硫化铁和磷酸铁的化合态形式存在。
The quality of lubricating oil products is one of the important factors that determine the development of modern science and technology and industrial production. Improving the performance of lubricating additives and developing its compounding technology are the keys to improve oil quality. Vulcanized olefins and di-n-butyl phosphite have been widely used in S-P gear oil as extreme-pressure antiwear and friction reducing additive. There are some reports on the synergistic effect of the two compounds and some studies have not been reported yet Its synergistic mechanism in-depth research results published. Therefore, using HQ-1 type friction and wear testing machine to examine the lubricating properties of these two typical additive complex system, and using the microscopic analysis of test means to examine the synergic mechanism of the two when used in combination. The results show that the highest card-free bite load with sulfurized olefin and di-n-butyl phosphite is obviously increased, and the largest increase is obtained when the P / S molar ratio is 0.02, which is attributed to the running-in effect Of the reaction film and the substrate to improve the bonding strength, as well as the sulfur and phosphorus and iron reaction speed of the best match; under certain conditions, the compound system can generate a new phosphorus-containing compounds, and Sulfur and phosphorus-rich mixed reaction film was formed on the friction surface. Sulfur and phosphorus existed in the film mainly in the form of chemical forms of iron sulfide and iron phosphate.