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以注塑成型法制备了聚四氟乙烯(PTFE)和MoS2填充PA1010复合材料,采用M-2000磨损试验机考察了复合材料与45钢对摩时的摩擦磨损性能,并利用扫描电子显微镜(SEM)分析了PA复合材料磨损表面及其偶件表面转移膜形貌。研究结果表明:PTFE填充PA1010可显著改善尼龙复合材料的摩擦磨损性能。PTFE质量分数为25%时,复合材料的摩擦学综合性能最佳。PTFE和MoS2共同填充PA1010时,复合材料的摩擦因数和磨损率随着PTFE含量的减少、MoS2含量的增加,整体呈现增大趋势,其中PA+20%PTFE+5%MoS2复合材料的减摩抗磨性能较好。在正常工作条件下(0.21-0.42 m/s,100-300 N),PA+25%PTFE复合材料的抗磨性优于相同条件下PA+20%PTFE+5%MoS2复合材料,但PA+20%PTFE+5%MoS2复合材料具有更宽的速度适用范围。PA复合材料的摩擦磨损性能与其在偶件表面形成的转移膜的特性有重要关系,转移膜的厚度大小、分布均匀状况以及和偶件的结合强度都会对复合材料的减摩抗磨性能产生影响。
The polytetrafluoroethylene (PTFE) and MoS2-filled PA1010 composites were prepared by injection molding. The friction and wear properties of the composites were compared with that of 45 steel by M-2000 wear tester. Scanning electron microscopy (SEM) The surface morphology of the surface of PA composite wear surface and its coupling surface was analyzed. The results show that: PTFE filled with PA1010 can significantly improve the friction and wear properties of nylon composites. When the mass fraction of PTFE is 25%, the tribological properties of the composites are the best. When PTFE and MoS2 were filled with PA1010, the friction coefficient and wear rate of the composites increased with the decrease of PTFE content and MoS2 content. The anti-frictional resistance of PA + 20% PTFE + 5% MoS2 composites Grinding performance is better. The wear resistance of PA + 25% PTFE composite under normal operating conditions (0.21-0.42 m / s, 100-300 N) is better than PA + 20% PTFE + 5% MoS2 composite under the same conditions, 20% PTFE + 5% MoS2 composites have a wider speed range. The friction and wear properties of PA composites are closely related to the properties of the transfer film formed on the surface of the conjugate. The thickness of the transfer film, the uniform distribution and the bonding strength of the composite also affect the friction and wear resistance of the composites .