边界润滑条件下天然橡胶—钢磨损机理的研究

研究了边界润滑条件下天然橡胶磨损20^＃钢的机理，采用扫描电子显微镜和X射线光电子能谱仪分析了钢和橡胶的磨损表面形貌、元素含量和化学状态，用镜面全反射傅立叶红外光谱仪分析了磨损表面官能团的变化，结果表明：20^#钢被天然橡胶磨损的物理过程为磨粒磨损（微切削）；20^#钢被天然橡胶磨损的化学机制包括钢本身的氧化（主要氧化产物为Fe2O3、FeO和Fe3O4），钢氧化物与天然橡胶大分子链间的反应，钢氧化物与氧化的矿物油烷烃链间的反应以及与矿物油中S元素间的反应，基信要反应产物为含有Fe－C的钢－聚合物以及含有Fe－O的聚合物。

Study on Mechanisms of Wear of AISI-1020 Steel by Natural Rubber under Boundary Lubrication Condition

The mechanisms of wear of AISI 1020 steel by natural rubber under boundary lubrication condition were investigated. The morphology of wear track as well as the content and chemical state of elements on the worn surfaces of steel and natural rubber were analyzed by means of scanning electron microscopy and X ray photoelectron spectroscopy. The functional groups on natural rubber surface were analyzed with Fourier transform infrared spectrometry. It has been found that the wear of AISI 1020 steel by natural rubber is dominated by micro cutting in terms of physical effect. It is also characterized by the surface oxidation of the steel and the mechanochemical reactions among the steel, natural rubber and mineral oil, in terms of the chemical effects. The main oxides on the worn surface of the steel include Fe 2O 3, FeO and Fe 3O 4. The iron oxides on the worn steel surface may react with the macromolecular chains of natural rubber containing oxygen group, the oxidized alkane chains, and the active sulfur in the mineral oil molecules. Subsequently the products including iron polymer compound and iron metal oxide polymer complex were generated on the sliding surface.