| ZHONG Lin,CHEN Junming,WANG Guorong,KANG Guirong,WEI Gang,LIAO Wenling.Synergistic Effect of Laser Shock Peening and Surface Texture on the Friction and Wear Behaviour of Piston Ring-Cylinder Liner Pair[J],54(11):63-73 |
| Synergistic Effect of Laser Shock Peening and Surface Texture on the Friction and Wear Behaviour of Piston Ring-Cylinder Liner Pair |
| Received:October 11, 2024 Revised:February 24, 2025 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.11.005 |
| KeyWord:PTFE/42CrMo friction pair laser shock peening surface texturing synergistic effect friction performance |
| Author | Institution |
| ZHONG Lin |
School of Mechatronic Engineering,Energy Equipment Institute, Southwest Petroleum University, Chengdu , China |
| CHEN Junming |
School of Mechatronic Engineering,Energy Equipment Institute, Southwest Petroleum University, Chengdu , China |
| WANG Guorong |
School of Mechatronic Engineering,Energy Equipment Institute, Southwest Petroleum University, Chengdu , China |
| KANG Guirong |
Sichuan Maxwell Oil Tools Co., Ltd., Sichuan Guanghan , China |
| WEI Gang |
School of Mechatronic Engineering,Energy Equipment Institute, Southwest Petroleum University, Chengdu , China |
| LIAO Wenling |
School of Intelligent Manufacturing, Chengdu Technological University, Chengdu , China |
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| Abstract: |
| Recent studies have shown that wear failure of the piston ring-cylinder liner pair is one of the main causes of compressor failures in gas storage tanks. Surface texturing technology can improve the tribological properties of materials, but the dynamic wear process will lead to changes in the shape and size of the texture, and the wear and friction reduction effect will be reduced. Therefore, it is necessary to further improve the service life of the friction pair in combination with other methods in the severe working conditions of gas storage compressors. Laser shock peening (LSP) can improve the wear resistance and fatigue strength of the material. In order to improve the lubrication and wear resistance of the PTFE/42CrMo piston ring-cylinder liner pair through the synergy of laser shock peening and surface texturing in the light of the abrasive wear and adhesive wear loss of the piston ring-cylinder line pair in gas storage compressor. The 42CrMo alloy steel cylinder liner was cut into unit specimens of 43.3 mm×19 mm×8 mm and ground to remove burrs and polished with a polishing machine on the impact surface. The 42CrMo cylinder liner specimens were firstly subject to laser shock peening by Y09-N04 infrared nanosecond laser. The laser process parameters were 5 J pulse energy, 3 mm spot diameter, 10 ns pulse width, and 50% overlap. Secondly, the RFL20H fibre laser marker was used to ablate evenly distributed circular pits with a diameter of about 800 μm, a depth of about 100 μm, and an area ratio of 20% on the surface of the shock peening-enhanced 42CrMo specimens. Based on the UMT high-frequency linear reciprocating module, the friction and wear test was carried out to the PTFE/42CrMo piston ring-cylinder liner pair unit under the simulated load of 200 N, frequency of 5 Hz, solid-phase dust particle size of 10-20 μm, mass fraction of about 1% of the ISO VG 32 lubricating oil infiltration environment to evaluate the friction performance of the pair under the combined effects of weaving, laser shock peening, and the synergistic effect of the two. The friction coefficient, wear amount and wear morphology were analyzed and evaluated. The results showed that under the simulated test conditions, the average coefficient of friction of the untreated specimen was 0.140 6 and the total wear was 1.188 mg, while the average coefficient of friction of the laser shock peening synergized with surface texturing was 0.069 9 and the total wear was 0.670 mg. The laser shock peening synergistic surface texturing could reduce the coefficient of friction of PTFE/42CrMo piston ring-cylinder liner pair by about 50%, and increase the wear resistance by about 43%, which was mainly attributed to the synergistic effect of texturing to capture and store wear particles and the laser peening to reduce the adherent wear and the other reason was the residual compressive stress of the surface under the effect of the laser shock peening to neutralize some residual tensile stress of the laser-abraded textured area, thus effectively eliminating the thermal effect defects at the edges of the texturing, followed by the improvement of the surface hardness to effectively eliminate the wear resistance. On the other hand, the residual compressive stress on the surface texturing is neutralized by the laser impact strengthening, thus effectively eliminating the thermal effect defects at the edges of the texturing, and the increase in surface hardness effectively improves the wear resistance of the mating pairs. In summary, laser shock peening and surface texturing synergistically improve the tribological performance of PTFE/42CrMo friction pair, which provides an innovative solution for the improvement of lubrication and wear resistance of piston ring-cylinder liner pair under the complex media conditions of gas storage tank compressor. |
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