Tribological performance and self-lubricating mechanism of the laser-textured surface filled with solid lubricant in rolling friction pair
Abstract
Purpose
This paper aims to find out the tribological performance and self-lubricating mechanism of the laser-textured surface filled with solid lubricant in rolling friction pair.
Design/methodology/approach
The textures on the surfaces of GCr15 bearing steel were produced by acousto-optic Q diode-pumped yttrium aluminum garnet laser with the technology of “single pulse one time, repeating at intervals” and filled with composite solid lubricant. The tribology tests were conducted on the MMW-1A universal friction and wear testing machine.
Findings
It was found that the solid-lubricated micro-textured surface can reduce the friction coefficient effectively. The MoS2/PI composite solid lubricant works better than the single MoS2 solid lubricant, and the ratio of PI/MoS2 + PI at 20 per cent is the best recipe. The friction coefficient of the sample surfaces decreases first and then increases with the increase in texture densities, and a texture density of 19.6 per cent has the best effect on friction reduction. The friction coefficient of the textured surfaces gradually decreases with the increase in both rational speed and load. For the same texture density, the friction coefficient of textured surfaces decreases slightly with the increase in diameter. Furthermore, the mechanism of “rolling-extrusion-accumulation” occurred on the textured surface can collect the solid lubricant, thereby, improve the effect of lubricating and anti-friction.
Originality/value
The results of the experimental studies demonstrated the application prospect of laser surfaces texturing combined with solid lubricant in rolling friction pair.
Keywords
Acknowledgements
This research was supported by the National Natural Science Foundation of China (No. 51375211 51375213), Science and Technology Project of Jiangsu Province (No. BE2015095), Program Sponsored for Practical Innovation Research of Professional Degree Postgraduate Students in Jiangsu Province (NO. SJZZ16_0197).
Citation
Hua, X., Xie, X., Yin, B., Zhang, P., Ji, J., Wang, H. and Fu, Y. (2018), "Tribological performance and self-lubricating mechanism of the laser-textured surface filled with solid lubricant in rolling friction pair", Industrial Lubrication and Tribology, Vol. 70 No. 2, pp. 371-384. https://doi.org/10.1108/ILT-07-2017-0210
Publisher
:Emerald Publishing Limited
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