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以注塑成型法制备了聚四氟乙烯(PTFE)填充PA1010复合材料,利用M-2000磨损试验机测试了该复合材料与GCr15轴承钢对摩时的摩擦磨损性能,并用扫描电子显微镜(SEM)观察了试样磨损表面形貌.结果表明:PTFE填充PA1010可显著改善尼龙复合材料的摩擦磨损性能.w(PTFE)为25%时,复合材料的摩擦学综合性能最佳.复合材料的摩擦系数和磨损体积随施加载荷、滑动速度的增加分别呈现降低和增加的趋势.在200 N载荷下,复合材料磨损主要为磨粒磨损;在400 N载荷下,磨损表现为黏着磨损和磨粒磨损共同作用.在滑动速度为0.21 m/s时,材料摩擦表面因挤压发生塑性流变,其磨损机理为磨粒磨损;在滑动速度为0.84 m/s,复合材料因热疲劳和应力疲劳发生剥层,磨损机理转变为疲劳剥层磨损.
The polytetrafluoroethylene (PTFE) filled PA1010 composite was prepared by injection molding. The friction and wear properties of the composite with GCr15 bearing steel were tested by M-2000 wear tester. The friction and wear properties of the composite were tested by scanning electron microscopy The results show that PTFE filled PA1010 can significantly improve the friction and wear properties of nylon composites.When the PTFE content is 25%, the tribological properties of the composites are the best.The friction coefficient of the composites The wear volume tends to decrease and increase with the increase of applied load and sliding speed, respectively. At 200 N load, the wear of the composite is mainly abrasive wear. Under the load of 400 N, the wear shows cohesive wear and abrasive wear When the sliding velocity is 0.21 m / s, the frictional surface of the material is plastically deformed due to extrusion and its wear mechanism is abrasive wear. When the sliding velocity is 0.84 m / s, the composite material is peeled off due to thermal fatigue and stress fatigue , Wear mechanism into fatigue wear layer wear.