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为研究端面扭动摩擦特性,研制了端面扭动摩擦特性测量装置,进行了玻璃纤维增强铸型尼龙(MC尼龙)复合材料与45#钢在123 N法向载荷下的扭动与滑动摩擦学试验,扭动角位移幅值为60°和90°,使用扫描电镜观察MC尼龙复合材料磨损表面形貌,采用光学显微镜观察45#钢偶副表面转移膜形貌.结果表明:扭动摩擦的扭矩-角位移(T-θ)曲线随着循环次数的增加保持平行四边形,而摩擦扭矩随之升高;扭动状态下的摩擦系数高于滑动摩擦系数,扭动磨损后MC尼龙试样质量增加;滑动状态下的磨损机理主要为塑性变形和疲劳磨损,扭动状态下的磨损机理为更为严重的黏着磨损和疲劳磨损;滑动摩擦状态下,45#钢偶副表面形成了大面积连续的转移膜,扭动状态下,45#钢偶副表面只在接触中心区域有少量条块状转移物质.
In order to study the torsional friction characteristics of the end face, a device to measure the torsional friction of the end face was developed. The twisting and sliding tribological properties of the glass fiber reinforced nylon (MC) nylon and 45 # steel under the normal load of 123 N were studied. The amplitude of twist angular displacement was 60 ° and 90 °, and the wear surface morphology of MC nylon composite was observed by scanning electron microscope (SEM). The morphology of transfer surface of 45 # steel was analyzed by optical microscope.The results showed that The torque-angular displacement (T-θ) curve keeps the parallelogram with the increase of the number of cycles, and the friction torque increases accordingly. The friction coefficient in the twisting state is higher than the sliding friction coefficient, and the MC nylon sample mass The wear mechanism of the sliding state is mainly plastic deformation and fatigue wear, the wear mechanism under the twisting state is the more serious adhesive wear and fatigue wear; Under the sliding friction state, the 45 # steel couples the surface to form a large area continuous Of the transfer film, twisted state, 45 # steel even surface in contact with the center area of a small amount of block transfer material.