| QI Peng-hao,TONG Zhe,LIU Qi,LI Yue,DONG Guang-neng.Tribological Properties of DLC Coated Textured Surfaces under Grease Lubrication[J],50(1):296-304 |
| Tribological Properties of DLC Coated Textured Surfaces under Grease Lubrication |
| Received:June 17, 2020 Revised:September 27, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.01.025 |
| KeyWord:PFPE grease surface texture diamond-like carbon film friction wear composite processing |
| Author | Institution |
| QI Peng-hao |
Key Laboratory of Modern Design and Rotor-Bearing System of Education Ministry, Xi'an Jiaotong University, Xi'an , China |
| TONG Zhe |
Key Laboratory of Modern Design and Rotor-Bearing System of Education Ministry, Xi'an Jiaotong University, Xi'an , China |
| LIU Qi |
Key Laboratory of Modern Design and Rotor-Bearing System of Education Ministry, Xi'an Jiaotong University, Xi'an , China |
| LI Yue |
Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang , China |
| DONG Guang-neng |
Key Laboratory of Modern Design and Rotor-Bearing System of Education Ministry, Xi'an Jiaotong University, Xi'an , China |
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| Abstract: |
| The work aims to study the composite treatment of surface texture and diamond-like film (DLC) to improve the tribological properties of GCr15 bearing steel plate lubricated with perfluoropolyether (PFPE) grease. Four kinds of surface textures were designed to be combined with DLC coatings of two thicknesses. Two texture processing methods (plating DLC coating on the textured surface and processing texture on the DLC coating) were used to treat the surface of GCr15 metal disc. With perfluoropolyether grease as the lubricating medium, and through the ball-disk friction and wear test, the tribological performance of the surface of the GCr15 metal disk under the synergistic treatment of texture and DLC coating was evaluated, and the wear surfaces were analyzed by optical microscope. Among the four textured surfaces, the micro-texture had the best anti-friction and anti-wear properties, and the best synergistic effect with the DLC film. Under the set experimental conditions, the friction coefficient was 0.1186 and the wear width was 159.68 μm. Among the two DLC plated surfaces, the samples with thicker DLC film (3 μm) had better friction reduction and lower friction coefficient, but the width of the wear scar on the ball was larger, which was about 508.86 μm. The composite treatment method of plating DLC film on the textured surface had no obvious improvement on the tribological performance. Processing micro-textured surface on DLC coating, the coupling between surface texture and DLC coating was good, especially when processing micro-textured sample on 3 μm thick DLC film, the experimental friction coefficient was only 0.099 46, and wear width on the ball was 192.22 μm. The composite treatment method of processing micro-texture on DLC coating combines the oil storage characteristics of micro-texture and the anti-friction characteristics of DLC, and the two treatment methods produce a positive synergistic effect, thus obtaining a friction surface with good anti-friction and anti-friction properties. |
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