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在四球试验机上考察了含纳微米硼酸盐及二烷基二硫代磷酸锌 (ZDDP)复配添加剂的液体石蜡润滑下钢 -钢摩擦副的摩擦学性能 .采用 X射线光电子能谱仪和扫描电子显微镜分析了复配体系的作用机理 .结果表明 :纳微米硼酸盐 / ZDDP复配添加剂对钢 -钢摩擦副的抗磨作用产生对抗效应 ,在摩擦过程中的某一阶段摩擦系数突然升高 ,磨损加剧 ;在试验初期 ,磨斑表面较为光滑 ,相应的边界润滑膜为物理和化学吸附膜 ;随着试验时间的延长 ,钢球磨斑表面吸附膜发生破裂 ,磨斑表面变得粗糙并形成微小磨屑碎片 ,相应的摩擦系数突然升高 ;随着试验时间的进一步延长 ,添加剂同钢球磨损表面发生摩擦化学反应 ,并生成含 B、N、S和 P等元素的摩擦化学反应膜 ,从而使摩擦系数波动减小 .
The tribological properties of the steel-steel friction pair lubricated with liquid paraffin containing nano-micron borate and zinc dialkyldithiophosphate (ZDDP) compound additive were investigated on a four-ball testing machine.Using X-ray photoelectron spectroscopy Scanning electron microscope (SEM) was used to analyze the action mechanism of the complex system. The results showed that the nano-micron borate / ZDDP compound additive had a countermeasure against the wear resistance of the steel-steel friction pairs. At a certain stage of the friction process, the friction coefficient suddenly In the early stage of the experiment, the surface of the wear scar was smoother, and the corresponding boundary lubrication film was the physical and chemical adsorption film. As the test time prolonged, the adsorption film on the surface of the steel ball spot ruptured and the surface of the wear spot became rough And the formation of tiny debris debris, the corresponding coefficient of friction suddenly increased; with the test time to further extend the frictional chemical reaction of the additive with the ball wear surface, and the formation of containing B, N, S and P and other elements of the tribochemical reaction Film, thereby reducing the friction coefficient fluctuations.