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Volume 2017 (2017), Article ID 6097486, 7 pages
https://doi.org/10.1155/2017/6097486
Research Article

Wear Characteristic of Stellite 6 Alloy Hardfacing Layer by Plasma Arc Surfacing Processes

School of Material Science and Engineering, Jiangsu University of Science and Technology, Jiangsu 212003, China

Correspondence should be addressed to Zhiyuan Zhu; moc.361@uhzenagnalas and Chun Ouyang; moc.361@4101cyo

Received 16 August 2017; Revised 9 October 2017; Accepted 24 October 2017; Published 20 November 2017

Academic Editor: Guosong Wu

Copyright © 2017 Zhiyuan Zhu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The microstructure and wear resistance of Stellite 6 alloy hardfacing layer at two different temperatures (room temperature and 300°C) were investigated by plasma arc surfacing processes on Q235 Steel. Tribological test was conducted to characterize the wear property. The microstructure of Stellite 6 alloy coating mainly consists of α-Co and (Cr, Fe)7C3 phases. The friction coefficient of Stellite 6 alloys fluctuates slightly under different loads at 300°C. The oxide layer is formed on the coating surface and serves as a special lubricant during the wear test. Abrasive wear is the dominant mechanism at room temperature, and microploughing and plasticity are the key wear mechanisms at 300°C.