Synergistic effect of micro-textures and MoS2 on the tribological properties of PTFE film against GCr15 bearing steel

• Published in: Journal of mechanical science and technology 2021, 35(5), , pp.2151-2160
• Main Authors: Xie, Xuan, Hua, Xijun, Li, Jianhua, Cao, Xiaobin, Tian, Zhixiang, Peng, Rui, Yin, Bifeng, Zhang, Peiyun
• Format: Article
• Language: English
• Subjects: Bearing steels; Coefficient of friction; Control; Dynamical Systems; Engineering; Friction; Guide rails; Industrial and Production Engineering; Lubricants & lubrication; Mechanical Engineering; Mechanical properties; Molybdenum disulfide; Neodymium lasers; Original Article; Performance tests; Polytetrafluoroethylene; Semiconductor lasers; Sliding contact; Solid lubricants; Synergistic effect; Tribology; Vibration; Wear resistance; YAG lasers; 기계공학
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-021-0431-5

To enhance the friction and wear resistance of GCr15/PTFE sliding contact surfaces, the synergistic lubrication effect of micro-textures and solid lubricants were studied in this paper. Micro-textures were processed on GCr15 samples by Nd:YAG laser, which were filled with MoS 2 . Tribological performance tests were carried out on a Rtec-MFT 5000 tester. Tribological properties were optimal with the textures density of 20% and depth of 9 µm. A continuous composite solid lubricating film was formed by PTFE and MoS 2 . As load increases, friction coefficient of the sample shows a rapid decline and then stabilizes. With the increase of reciprocating frequency, friction curve of the sample shows a trend of slight fluctuation. When frequency is 2.7 Hz, friction coefficient is the lowest. Tribological properties of PTFE/GCr15 contact surfaces could be significantly optimized by micro-textures and MoS 2 , which performs favorable prospect of engineering application such as guide rails, bearings, machinery seal, etc.