有机钼及其复合纳米润滑添加剂的摩擦磨损性能研究

采用X-P型销-盘摩擦磨损试验机和MRS-10J型四球摩擦磨损试验机考察了N68MD、N68ME、N68和SAE404种含有机钼及其复合纳米润滑添加剂的润滑油的摩擦磨损性能,分别采用扫描电子显微镜和电子衍射能量谱仪分析了摩擦副的磨损形貌及其磨损表面元素分布情况.结果表明:在N68MD润滑时,钢/钢摩擦副具有较低的摩擦系数和磨损量,并且具有良好的抗极压性能;在N68ME润滑时,钢/钢摩擦副除了表现出很小的摩擦系数和良好的抗极压性能以外,还表现出优异的自修复功能,这是由于有机钼与纳米铜协同作用的结果.

Friction and Wear Behavior of Organic Molybdenum and Its Composite with Nano-particle Anti-Wear Additive

Anti-wear and friction reducing properties of four kinds of lubricant oils, N68, N68MD, Mobil SAE40 and N68ME, were examined with an X-P type pin-on-disk apparatus and a four-ball machine. Relationships between friction coefficient and time were studied and lubrication mechanisms of additives were investigated. Morphology and surface element distribution of the worn surfaces were analyzed by scanning electron microscopy (SEM) and electron dispersion spectrums analysis (EDS) respectively. It is found that friction coefficient of samples lubricated with N68MD decreased with time. Tribo-pairs lubricated with N68MD exhibited lower friction coefficient and lower wear rate. This was probably because N68MD contains elements of SP and Mo which could form a thin sediment layer on the worn surface of steel ball. Tribo-pairs lubricated with N68ME exhibited good extreme-pressure performance and very low friction coefficient, and with good self-repairing ability. This was probably caused from synergistic action of elements of SPMo, and nano-copper et al contained in the N68ME.