Ni-P-Nano PTFE镀层的制备及摩擦学性能研究  

Study on the Preparation and Tribological Properties of the Ni-P-Nano PTFE Coating

作　　者：戴媛静[1] 邹洋 张紫铜 李小磊 DAI Yuanjing;ZOU Yang;ZHANG Zitong;LI Xiaolei(State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;Research Center of Lubrication Technology,Tianjin Research Institute for Advanced Equipment of Tsinghua University,Tianjin 300300 China;Ji Hua Laboratory,Foshan Guangdong 528200,China)

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084 [2]清华大学天津高端装备研究院润滑技术研究所,天津300300 [3]季华实验室,广东佛山528200

出　　处：《润滑与密封》2021年第12期7-18,共12页Lubrication Engineering

基　　金：国家重点研发计划项目(2018YFB2002204;2020YFB2010600;2020YFA0711000);国家自然科学基金项目(51805291);贵州省科技重大专项(黔科合重大专项字[2019]3016号);国防基础科研项目(JCKY2020110B007)。

摘　　要：为提高轴承钢表面性能,提出一种化学复合镀工艺。采用"机械搅拌+化学分散"相结合的方式在轴承钢表面制备Ni-P-Nano PTFE镀层,利用UMT摩擦磨损试验机对比研究轴承钢、Ni-P镀层和Ni-P-Nano PTFE镀层的摩擦学性能,并研究不同载荷、不同频率条件下Ni-P-Nano PTFE镀层的摩擦学性能。结果表明:复合镀层表面均匀平整致密,且与基底结合强度高;与轴承钢相比,Ni-P-Nano PTFE镀层的摩擦因数降低了55%,磨损率降低了31.07%,对偶钢球的磨斑直径降低了34.19%;在载荷不高于20 N、频率不高于15 Hz条件下Ni-P-Nano PTFE镀层拥有较长的服役寿命,经过长时间的往复摩擦仍未失效。Ni-P-Nano PTFE镀层能够显著提高轴承钢的抗磨减摩性能,研究结果可以为航空、机械、化工等领域的材料表面设计提供一种新的思路。In order to improve the surface performance of bearing steel,the electroless composite plating process was proposed.Ni-P-Nano PTFE coating was prepared on the surface of bearing steel by a combination of mechanical stirring and chemical dispersion.The tribological behaviors of bearing steel,Ni-P coating and Ni-P-Nano PTFE coating were tested with an universal micro-tribotester(UMT),and the tribological behaviors of Ni-P-Nano PTFE coating were tested under different loads and frequencies.The results show that the composite coating,with high bonding strength with the bearing steel,is uniform,flat and compact.Compared with the bearing steel,the coefficient of friction of composite coating is reduced by 55%,the wear rate of the composite coating is reduced by 31.07%,and the wear scar diameter of the steel ball is reduced by 34.19%.When the load is less than 20 N and the frequency is lower than 15 Hz,Ni-P-Nano PTFE coating has a long service life,and it can bear multiple reciprocating friction.The Ni-P-Nano PTFE coating can significantly improve the anti-wear and friction reducing properties of the bearing steel.The research results can provide a new idea for designing the surface of metal materials in the fields of aviation,machinery,and chemical engineering.

关 键 词：纳米PTFE 化学复合镀 减摩抗磨 表面处理 

分 类 号：TH117.1[机械工程—机械设计及理论]