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采用化学镀在Q235钢基材上制备了纳米和微米PTFE粒子的Ni-P/PTFE复合镀层.用球盘式摩擦磨损试验机研究了镀层摩擦系数与PTFE体积百分数的关系以及具有最小摩擦系数镀层的承载能力.结果表明:纳米和微米复合镀层均在PTFE的体积含量约26%时出现最佳的减摩效果,摩擦系数为0.11～0.15.纳米粒子复合镀层的摩擦系数与磨损量在较低载荷下与微米粒子复合镀层接近,但其承载能力远优于微米粒子复合镀层,两者临界载荷之比约为3.5.
Ni-P / PTFE composite coatings with nano-sized and micro-sized PTFE particles were prepared on Q235 steel substrate by electroless plating.The relationship between coating friction coefficient and volume fraction of PTFE was studied by ball-and-disk friction and wear tester, The results show that the best antifriction effect is obtained when the volume fraction of PTFE is about 26%, and the friction coefficient is 0.11-0.15.The friction coefficient and wear amount of nano-particle composite coating are lower Under loading, it is close to the composite coating of microparticles, but its carrying capacity is much better than that of microparticle composite coating, the critical load ratio of the two is about 3.5.