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Comparisons of tribological properties between laser and drilled dimple textured surfaces of medium carbon steel

Chenchun Shi (Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China)
Aibing Yu (Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China)
Jianzhao Wu (Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China)
Weiyang Niu (Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China)
Yanlin Wang (Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Publication date: 10 July 2017

Abstract

Purpose

The study aims to compare tribological properties between laser dimple textured surface and drilled dimple textured surface, and to analyze the influence of dimple hardened edges and ability of trapping wear debris on wear properties of dimple textured surfaces.

Design/methodology/approach

Circular textured dimples were produced on AISI 1,045 specimen surfaces using laser surface texturing (LST) and drilled surface texturing (DST) methods. Tribological behaviors of LST, DST and non-textured specimens were studied using ball-on-disc tribo-tester. Metallographic structures, dimples and worn surface morphologies were observed using a three-dimensional digital microscope. Hardnesses of substrate and dimple edges were measured.

Findings

There was no obvious difference in wear and friction coefficients between LST and DST specimens. Hardnesses of laser dimple edges were much higher than that of drilled dimple edges and specimen substrate. The hardened materials of laser dimple edge included recast zone and heat affect zone. Laser dimple was cone-shaped and drilled dimple was cylinder-shaped. Drilled dimple had a better ability of trapping wear debris than laser dimple. Non-uniform wear phenomenon occurred on worn surfaces of LST dimple specimens.

Originality/value

The ability of textured dimples to trap wear debris is affected by single dimple volume. Hardened edges of dimples cause non-uniform wear on worn surfaces of LST specimens.

Keywords

Acknowledgements

This study was supported by National Natural Science Foundation of China (Grant No. 51175270) and Zhejiang Provincial Natural Science Foundation of China (Grant No. LY15E050006). This study was also sponsored by K.C. Wong Magna Fund in Ningbo University.

Citation

Shi, C., Yu, A., Wu, J., Niu, W. and Wang, Y. (2017), "Comparisons of tribological properties between laser and drilled dimple textured surfaces of medium carbon steel", Industrial Lubrication and Tribology, Vol. 69 No. 4, pp. 516-526. https://doi.org/10.1108/ILT-03-2016-0040

Publisher

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Emerald Publishing Limited

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