矿物润滑剂对类气缸-活塞摩擦副的减摩抗磨作用

摘要

采用机械化学法制备蛇纹石矿物复合润滑剂，借助 RFT-III 型往复摩擦磨损试验机评价其对类气缸-缸套摩擦副的减摩抗磨性能，利用扫描电镜（SEM）、能量色散谱仪（EDS）和光电子能谱仪（XPS）对磨损表面进行表征，探讨其减摩抗磨机制。结果表明，所制润滑剂具有优异的减摩抗磨特性，且与载荷、速度有关。50 N、1.0 m /s 时，其摩擦因数较基础油润滑时降低约64.3％，磨损显著降低甚至呈负磨损。蛇纹石矿物复合润滑剂的作用机制为参与摩擦界面复杂的理化作用，促进碳向摩擦界面富集和氧化膜的形成，提高接触表面的润滑性能和磨损抗力。%A composite serpentine mineral lubricant was prepared by the mechano-chemistry method.The friction and wear reducing performance was evaluated by employing the RFT-III reciprocating friction and wear tester.The correspond-ing mechanism was discussed based on the wear surface characterization by scanning electron microscope(SEM),energy dispersive spectroscopy(EDS)and X-ray photoelectron spectroscopy(XPS).Results show that the as-prepared lubricant displays excellent friction and wear reducing performance associated with the load and velocity.The friction coefficient is decreased by 64.3% compared to that of the base oil,and the wear is significantly decreased even shows a negative value accordingly.The mechanism for the above-mentioned lubricant is to serve as a promoter for the carbon enrichment and ox-ide layer formation at the friction interface as to improve the lubricating and antiwear abilities.