Abstract: A study on the performance of the wear resistance coatings based on PTFE was carried out. The surface of the friction samples was sprayed with the wear resistance coatings.The property of the cured wear resistance coating film was investigated via the friction test, surface morphology and process parameter variation such as spraying gun pressure and surface roughness. The results showed that the friction coefficient increased firstly and then was stable at 0. 15, meanwhile, the wear rate increased firstly, then reduced and finally kept stable. The result of surface morphology analysis indicated that the wear loss of the friction pair was mainly resulted from abrasive wear. Besides the uniformity of wear resistance coatings was optimal when the spraying gun pressure was 0.3 MPa. In addition, the adhesion of wear resistance coatings was optimal when the surface roughness was 6.3 um. The result also indicated that the coatings had a good wear resistance with a low friction coefficient and wear loss, furthermore, the optimal coating performance could be obtained when the spraying gun pressure and surface roughness were adjusted appropriately.

Key words: PTFE, friction coefficient, wear loss surface roughness, adhesive

摘要： 通过喷涂的方法将聚四氟乙烯基耐磨涂料喷涂在摩擦试验样件基体表面,将该摩擦试验样件及其配对的摩擦副进行摩擦磨损试验、表面形貌分析和改变喷枪压力及表面粗糙度的工艺参数以分析涂层性能。结果表明:聚四氟乙烯基耐磨涂层经摩擦系数、磨损量测试后,摩擦系数先增大再稳定不变,最后稳定在0.15;磨损量先增大再减小最后稳定,即磨损量最后为恒定值。从表面形貌分析得出摩擦副的磨损主要是磨料磨损造成的。当喷枪压力为0.3 MPa时,耐磨涂层的膜层均匀性最佳;表面粗糙度为6.3μm时,耐磨涂层与基体的附着效果较好。其结论得出该涂层摩擦系数和磨损量较低,耐磨性能较好,同时,当喷枪压力和表面粗糙度工艺参数合适时,耐磨涂层的性能效果最佳。

关键词: 聚四氟乙烯, 摩擦系数, 磨损量, 粗糙度, 附着力