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由化学镀得到的聚四氟乙稀、石墨、氟化石墨、硫化钼及氟化钙粒子等与镍磷一起沉积的五类自润滑复合镀层。在环块试验机及销盘试验机上研究了其摩擦磨损特性。得出其摩擦系数与抗磨性、试验负荷、粒子含量和镀层的热处理与否有关。与淬火GCr15和氮化过的钢相比,自润滑复合镀层具有低的摩擦系数,比之纯Hi-p镀层其摩擦系数也较低。 由AES和SEM对磨损表面进行分析,当表面的Ni-p逐步磨去时,固相润滑粒子逐步暴露。对细粒子来说(如小于2μm的PTFE)能在对磨件表面形成转移膜,降低摩擦系数,其磨损率略有提高。但如粒子过大(如大于2μm的石墨)则石墨粒子压延并抛光,或碎裂脱落,也能转移并降低摩擦,但使磨损量大为增加。
From the electroless plating PTFE, graphite, graphite fluoride, molybdenum sulfide and calcium fluoride particles deposited with nickel and phosphorus five types of self-lubricating composite coating. The friction and wear characteristics of the ring block tester and pin plate tester were studied. Obtained the friction coefficient and abrasion resistance, test load, particle content and coating heat treatment or not. Compared with the hardened GCr15 and nitrided steel, the self-lubricating composite coating has a lower coefficient of friction than the pure Hi-p coating, which also has a lower coefficient of friction. By AES and SEM analysis of the worn surface, when the surface Ni-p gradually worn away, the solid-phase lubrication particles gradually exposed. Fine particles (such as less than 2μm of PTFE) can form a transfer film on the surface of the workpiece, reducing the friction coefficient, the wear rate increased slightly. However, if the particles are too large (such as more than 2μm graphite) graphite particles calendered and polished, or broken off, but also to transfer and reduce friction, but the amount of wear and tear increased greatly.