Long Risheng, Hou Jincheng, Zhang Yimin, Shang Qingyu, Ma Chi, Pape Florian, Marian Max
Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang 110142, China.
Liaoning Provincial Key Laboratory of Efficient Chemical Mixing Technology, Shenyang 110142, China.
Polymers (Basel). 2024 Dec 17;16(24):3505. doi: 10.3390/polym16243505.
To enhance the sliding tribological performance between PTFE and 40#steel (AISI 1040) under full film lubrication conditions, laser surface texturing (LST) technology was employed to prepare micro-dimples on the contact surfaces of 40# steel discs. The Box-Behnken design response surface methodology (BBD-RSM) was applied to optimize the micro-dimple parameters. Coefficients of friction (COFs), wear losses and worn contact surfaces of the PTFE-40# steel tribo-pairs were researched through repeated wear tests, as lubricated with sufficient anti-wear hydraulic oil. The influencing mechanism of micro-dimples on the tribological behavior of tribo-pairs was also discussed. The results proved that micro-dimples can significantly improve the tribological properties of PTFE-40#steel tribo-pairs. The deviation between the final obtained average COF and the prediction by the BBD-RSM regression model was only 0.0023. Following optimization, the average COF of the PTFE-40# steel tribo-pair was reduced by 39.34% compared to the smooth reference. The wear losses of the PTFE ring and 40# steel disc decreased by 91.8% and 30.3%, respectively. This study would offer a valuable reference for the optimal design of key seals used in hydraulic cylinders.
为了提高聚四氟乙烯（PTFE）与40#钢（AISI 1040）在全膜润滑条件下的滑动摩擦学性能，采用激光表面织构化（LST）技术在40#钢圆盘的接触表面制备微凹坑。应用Box-Behnken设计响应面方法（BBD-RSM）优化微凹坑参数。通过重复磨损试验研究了PTFE-40#钢摩擦副的摩擦系数（COF）、磨损损失和磨损后的接触表面，试验中使用了充足的抗磨液压油进行润滑。还讨论了微凹坑对摩擦副摩擦学行为的影响的影响机制。结果表明，微凹坑可显著改善PTFE-40#钢摩擦副的摩擦学性能。最终得到的平均COF与BBD-RSM回归模型预测值之间的偏差仅为0.0023。优化后，PTFE-40#钢摩擦副的平均COF相较于光滑参考面降低了39.34%。PTFE环和40#钢圆盘的磨损损失分别降低了91.8%和30.3%。本研究将为液压缸关键密封件的优化设计提供有价值的数据参考。
