Improving the high-temperature oxidation resistance of H13 steel by laser cladding with a WC/Co-Cr alloy coating
Abstract
Purpose
This paper aims to discuss that a WC/Co-Cr alloy coating was applied to the surface of H13 steel by laser cladding.
Design/methodology/approach
The oxidation behavior of the WC/Co-Cr alloy coating at 600°C was investigated by comparing it with the performance of the steel substrate to better understand the thermal stability of H13 steel.
Findings
The results showed that the WC/Co-Cr alloy coating exhibited better high-temperature oxidation resistance and thermal stability than did uncoated H13 steel. The coated H13 steel had a lower mass gain rate and higher microhardness than did the substrate after different oxidation times.
Originality/value
The WC/Co-Cr alloy coating was composed of e-Co, CW3, Co6W6C, Cr23C6 and Cr7C3; this mixture offered good thermal stability and better high-temperature oxidation resistance.
Keywords
Acknowledgements
This work was financially supported by the China Postdoctoral Science Foundation (2014M562149) and the Natural Science Foundation of Guangdong Province China (2015A030310162).
Citation
Zhang, X., Jie, X., Zhang, L., Luo, S. and Zheng, Q. (2016), "Improving the high-temperature oxidation resistance of H13 steel by laser cladding with a WC/Co-Cr alloy coating", Anti-Corrosion Methods and Materials, Vol. 63 No. 3, pp. 171-176. https://doi.org/10.1108/ACMM-11-2015-1606
Publisher
:Emerald Group Publishing Limited
Copyright © 2016, Emerald Group Publishing Limited