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采用 FAL EX试验机考察了 2 0 #钢 /天然橡胶在干摩擦条件下的磨损机理 .用扫描电子显微镜分析了 2 0 #钢和橡胶磨损表面形貌 ,用 X射线光电子能谱仪分析了金属和橡胶磨损表面元素的含量及化学状态 ,用镜面全反射傅立叶红外光谱仪分析了橡胶磨损表面官能团的变化 .结果表明 ,2 0 #钢 /天然橡胶摩擦副发生了粘着磨损 ,其磨损机制为 :金属及金属氧化物与天然橡胶大分子自由基在摩擦表面发生反应 ;在亚表层以金属与大分子自由基的反应为主 ,主要产物为含有 Fe- C的金属 -聚合物 ;金属本身发生氧化 ,主要产物为 Fe2 O3、Fe O和 Fe3O4,而在亚表层的主要产物以 Fe O为主 .表面膜可能通过化学键、静电作用力和分子间的范德华力与金属基体相结合
The wear mechanism of 20 # steel / natural rubber under dry friction condition was investigated by using FALEX tester.The surface morphology of 20 # steel and rubber wear surface was analyzed by scanning electron microscopy, and the metal And the content and chemical state of rubber wear surface elements, the changes of the functional groups on rubber wear surface were analyzed by specular total reflection Fourier transform infrared spectroscopy.The results showed that the adhesion wear occurred on the friction pair of 20 # steel / natural rubber and the wear mechanism was: metal And metal oxide and natural rubber macromolecule free radicals react on the frictional surface. In the sub-surface, the reaction between metal and macromolecular free radicals is the main reaction, the main product is metal-polymer containing Fe-C, the metal itself is oxidized, The main products are Fe2O3, FeO and Fe3O4, while the main products in the subsurface are FeO. The surface film may be combined with the metal matrix through chemical bonds, electrostatic forces and intermolecular van der Waals forces