Tribological behaviors of precipitates reinforced Cr-Ni-Mo-V steel lubricated by water or water-silica mixture
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 8 August 2018
Issue publication date: 13 November 2018
Abstract
Purpose
This paper aims to investigate the friction and wear properties of Cr-Ni-Mo-V steel against 440C stainless steel under both water and water–silica mixture lubricant.
Design/methodology/approach
The Cr-Ni-Mo-V steel specimens were taken from a forged steel brake disc with the process of quenching at 900°C and tempering at 600°C. The tribological testing was performed using a contact configuration of ball-on-flat with a liquid cell according to the ASTM standard. Detailed examinations on the worn surface were analyzed using a scanning electron microscope.
Findings
The results indicate that the friction coefficient and friction damage of the steel sliding under water–silica mixture are higher than those under water. The friction coefficient decreases with increasing load and increases with the sliding speed for the two lubricants. The mass wear rate presents a rising trend with both sliding load and speed. The wear mechanisms of the Cr-Ni-Mo-V steel sliding under the two lubricants are oxidation wear, abrasive wear and fatigue wear.
Research limitations/implications
Because of the chosen tribological testing approach, the research results could not describe the tribological performance of the brake disc accurately during actual braking process of the high-speed train. Therefore, researchers are encouraged to test the proposed propositions further.
Originality/value
This study shows that the tribology behavior of the Cr-Ni-Mo-V steel with water or water–silica mixture lubrications helps the industrial firms and academicians to work on the wear of the brake disc in rainwater or wet environment.
Keywords
Acknowledgements
The authors kindly acknowledge the joint support by the Foundation for the Transformation of Scientific and Technological of Jiangsu Province (BA2016067), the Key Research and Development Program of Jiangsu Province (BE2015031), the Key University Science Research Project of Jiangsu Province (15KJA430004) and Outstanding Scientific and Technological Innovation Team in Colleges and Universities of Jiangsu Province.
Citation
Zhu, S., Zhang, B., Ba, Z., Mao, X., Fei, W. and Wang, Z. (2018), "Tribological behaviors of precipitates reinforced Cr-Ni-Mo-V steel lubricated by water or water-silica mixture", Industrial Lubrication and Tribology, Vol. 70 No. 8, pp. 1431-1436. https://doi.org/10.1108/ILT-07-2017-0219
Publisher
:Emerald Publishing Limited
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