钢-铜摩擦副在边界润滑条件下的减摩抗磨机理研究

用SRV摩擦磨损试验机分别考察了聚α烯烃基础油含磷氮添加剂和两种含氟硅油添加剂在钢-铜摩擦副滑动下的摩擦学性能,用扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)观察并分析了铜磨斑表面形貌和磨斑表面主要元素的化学状态.结果表明:含磷氮添加剂和含氟硅油添加剂均具有优良的减摩和抗磨性能;磷、氮和氟等在摩擦表面生成的摩擦化学产物是提高摩擦副抗磨减摩性能的根本原因.

Wear Resistance and Friction Reducing Mechanism of Bronze-Steel Tribopair under Boundary Lubrication

The friction and wear properties of two kinds of fluorosilicone oils and PN (amine salt of alkoxyl phosphate) as lubricant additives in poly-alpha-olefin are evaluated using an Optimol SRV reciprocating friction and wear tester by bronze disc against AISI 52100 steel ball. The morphologies of worn surfaces of the bronze discs are examined using a scanning electron microscopy. In addition, the elemental compositions and chemical states of several typical elements on the worn surfaces of the bronze discs are examined by means of X-ray photoelectron spectroscopy. Results indicate that oils containing PN and fluorosilicone as additives exhibit excellent wear-resistance and low and stable friction coefficient. This is partly attributed to tribophysical and tribochemical reaction of phosphorus, nitrogen and fluorine with the sliding surfaces.