鄂红军,杜雪岭,阿合波塔·巴合提,等.基于ta-C涂层/活塞环-缸套摩擦副润滑油摩擦学性能研究[J].内燃机工程,2022,43(3):52-56.
基于ta-C涂层/活塞环-缸套摩擦副润滑油摩擦学性能研究
Research on the Tribological Properties of Lubricant Based on ta-C Coating/Piston Ring–Liner Friction Pair
DOI：10.13949/j.cnki.nrjgc.2022.03.007
关键词:ta-C涂层  活塞环—缸套  SN/GF—5 0W—20发动机油  摩擦学性能  二烷基二硫代氨基甲酸钼  二烷基二硫代磷酸锌
Key Words:ta-C coating  piston ring–cylinder liner  SN/GF—5 0W—20 engine oil  tribological property  molybdenum dialkyl dithiocarbamate（MoDTC）  zinc dialkyl dithiophosphate（ZDDP）
基金项目:
作者单位E-mail
鄂红军* 中国石化润滑油有限公司北京研究院，北京 100085 ehj.lube@sinopec.com 
杜雪岭 中国石化润滑油有限公司北京研究院，北京 100085  
阿合波塔·巴合提 中国石化润滑油有限公司北京研究院，北京 100085  
金佳佳 中国石化润滑油有限公司北京研究院，北京 100085  
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摘要:采用SRV®4型多功能摩擦磨损试验机，使用四面体非晶碳（tetrahedral amorphous carbon， ta-C）涂层/活塞环—缸套摩擦副，研究了不同含量二烷基二硫代氨基甲酸钼（molybdenum dialkyl dithiocarbamate， MoDTC）SN/GF—5 0W—20发动机油摩擦学性能。研究结果表明，MoDTC明显影响ta-C涂层/活塞环—缸套摩擦副摩擦学性能，当Mo元素质量分数在0.03%~0.05%范围内时摩擦磨损性能最优；而当Mo元素质量分数为0.10%时摩擦磨损性能最差。在相同摩擦磨损试验条件下，研究Yubase4+基础油（Yubase4+， Yu4+）对照组、Yu4+/MoDTC和Yu4+/MoDTC/二烷基二硫代磷酸锌（zinc dialkyl dithiophosphate， ZDDP）润滑体系对ta-C涂层/活塞环—缸套摩擦副影响，并用扫描电子显微镜（scanning electron microscope， SEM）、X射线光电子能谱仪（X-ray photoelectron spectroscopy， XPS）对缸套磨损表面进行分析。研究结果表明，Yu4+/MoDTC体系摩擦系数最低，而Yu4+/MoDTC/ZDDP体系摩擦系数最高。这可能是因为ta-C材质活塞环硬度高，Yu4+/MoDTC/ZDDP润滑体系缸套摩擦膜中含有ZDDP自分解产物及与MoDTC、缸套表面作用产物（如MoO3、ZnS、Fe3O4、ZnO等），摩擦膜中磨粒大小不均匀在对偶间的摩擦造成较高的磨粒磨损，从而引起摩擦系数增加。
Abstract:The tribological properties of SN/GF—5 0W—20 engine oil with different content of molybdenum dialkyl dithiocarbamate（MoDTC） were studied on tetrahedral amorphous carbon（ta-C） coating/piston ring–cylinder friction pair by using SRV®4 multifunctional friction and wear tester. The research results show that MoDTC significantly affects the tribological properties of ta-C coating/piston ring–cylinder liner. When the content of Mo element is in the range of 0.03%~0.05% by weight， the friction and wear performance is the best. And when the content of Mo element is 0.10% by weight， the friction and wear performance is the worst. The effects of Yu4+ base oil/control group， Yubase4+（Yu4+）/MoDTC and Yu4+/MoDTC/zinc dialkyl dithiophosphate（ZDDP） lubrication systems on ta-C coating/piston ring–liner friction pairs were studied under the same friction and wear experiment conditions， and the wear step was analyzed by scanning electron microscope（SEM） and X-ray photoelectron spectroscopy（XPS）. The results show that the friction coefficient of the Yu4+/MoDTC system is the lowest， while that of the Yu4+/MoDTC/ZDDP system is the highest. This may be due to the high hardness of ta-C coating. The friction film of the cylinder liner of the Yu4+/MoDTC/ZDDP lubrication system contains ZDDP self-decomposition products and products that interact with MoDTC and the surface of the cylinder liner （such as MoO3， ZnS， Fe3O4， ZnO， etc.）. The uneven size of the abrasive particles in the friction film causes higher abrasive wear between the pairs， which causes the friction coefficient increasing.
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