机械密封动环表面化学复合镀Ni-P-PTFE膜的制备工艺及摩擦性能  

The Preparation and Frictional Performance of Electroless Ni-P-PTFE Composite Coatings on Mechanical Seals

作　　者：林平[1] 戴祥华[1] 董光能[1] 

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,陕西西安710049

出　　处：《润滑与密封》2013年第4期18-22,共5页Lubrication Engineering

基　　金：国家973计划资助项目(2009CB724206)

摘　　要：为改善机械密封动环的耐磨性,在高速钢动环表面镀制Ni-P-PTFE复合膜,并研究Ni-P-PTFE复合膜的制备工艺。通过扫描电镜观察Ni-P-PTFE复合膜表面形貌,在销-盘式摩擦磨损试验机上考察Ni-P-PTFE镀层/石墨配副的干摩擦性能。结果表明,在Ni-P-PTFE复合膜中有大量的PTFE微粒包裹在Ni-P构成的骨架中;与高速钢/石墨配副相比,Ni-P-PTFE镀层/石墨配副的摩擦因数在启动阶段就能维持在较低数值,有效地降低了密封的启动力矩;Ni-P-PTFE镀层平均摩擦因数较低且稳定,表明镀层具有较好的自润滑效果。In order to improve the antiwear performance of the moving rings of mechanical seals,electroless Ni-P-PTFE composite coating was prepared on the seal face of high speed steel moving ring, and the optimum plating process was stud- ied. The surface morphology of Ni-P-PTFE composite coating was observed with SEM, and the dry tribological behaviors were evaluated with a pin-on-disc tester using impregnated graphite as counterpart. The results indicate that there is large number of PTFE particulates are wrapped up in the skeleton of Ni-P in the Ni-P-PTFE composite coating. Ni-P-PTFE com- posite coating has low friction coefficient at the initial stage, which can effectively reduce the startup moment of the me- chanical seals. The average friction coefficient of Ni-P-PTFE composite coating is low and steady, indicating good self-lu- bricant effect of the coating.

关 键 词：机械密封 化学镀膜 摩擦因数 

分 类 号：TH117.1[机械工程—机械设计及理论]