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Journal of Central South University

, Volume 25, Issue 2, pp 331–341 | Cite as

Effect of geometric micro-groove texture patterns on tribological performance of stainless steel

  • Ping Chen (陈平)
  • Jun-ling Li (李俊玲)
  • Yun-long Li (李云龙)
Article
  • 44 Downloads

Abstract

This work describes an experimental investigation into the influence of geometric micro-groove texture patterns on the tribological performance of stainless steel. Five geometries were studied: one with untextured and four with micro-groove textured making parallel, triangular, square and hexagonal patterns. The micro-groove textures were produced using an MFT-20 laser system as well as a two-step laser surface texturing (LST) process. Tribological performance was measured using a pin-on-disk tribometer. The investigation showed that the two-step LST process could fabricate high-precision micro-grooves. The experimental data indicated that the micro-groove textured surfaces achieved the lower frictional coefficients than the untextured surface and the geometric patterns had significantly affected the tribological properties of samples in both lubricated and unlubricated states. The results were analyzed from the lubricant supplying and fluid dynamic pressure effect under lubricated conditions as well as abrasive capture and remove under dry friction conditions.

Key words

geometric pattern micro-groove texture frictional coefficient 

微凹槽织构几何分布对不锈钢摩擦学性能的影响

摘要

本文实验研究了表面织构沟槽的几何分布对不锈钢摩擦学性影响。 沟槽的分布形式分别是平行、 三角形、 正方形和六边形, 并对比研究无织构形式。 利用 MFT-20 激光系统加工织构, 采用销-盘磨损试验机测试其摩擦学性能, 同时利用扫描电镜观察分析微观形貌。 结果表明, 先粗加工后精加工的方法可加工出高精度织构; 有织构试样的摩擦系数低于无织构的摩擦系数, 且织构的几何分布影响润滑状态和无润滑状态下试样的摩擦学性能。 从润滑油的供给和流体动压润滑效应分析了润滑状态下的摩擦磨损机理; 从磨屑的捕捉以及去除分析了无润滑状态下的摩擦磨损机理。

关键词

几何分布 微凹槽织构 摩擦系数 

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Notes

Acknowledgement

The authors would like to express special thanks to SHAO Tian-min (State Key Laboratory of Tribology, Tsinghua University) for scientific guidance and Petre Denissenko and Roger Moss (The University of Warwick) for English writing assistance.

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Ping Chen (陈平)
    • 1
  • Jun-ling Li (李俊玲)
    • 1
  • Yun-long Li (李云龙)
    • 1
  1. 1.School of Mechanical EngineeringUniversity of Science and Technology BeijingBeijingChina

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