Preparation of Ni60-WC coating by plasma spraying, plasma re-melting and plasma spray welding on surface of hot forging die |
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Authors: | Junyuan Wang Huachang Wang Hongfu Wang Zhiqiang Zeng |
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Affiliation: | 1. School of Mechanical Engineering and Automation, North University of China, Taiyuan, 030051, China 2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
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Abstract: | In order to produce the hear-resistant inner layer of hot-forging die, the plasma spraying and plasma re-melting and plasma spray welding were adopted. Substrate material was W6Mo5Cr4V2, including 10%, 20%, 30% tungsten carbide (WC) ceramic powder used as coating material to obtain different Nickel-based WC alloys coating. Micro-structure and micro-hardness analysis of the coating layer are conducted, as well as thermophysical properties for the coating layer were measured. The experimental results show that the coating prepared with 70%Ni60, 30%WC powder has the best properties with plasma spray welding, in which the micro-hardness can achieve 900HV, meanwhile it can improve the thermal property of hot-forging die dramatically. |
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