Preparation of Ni60-WC coating by plasma spraying, plasma re-melting and plasma spray welding on surface of hot forging die

Junyuan Wang; Huachang Wang; Hongfu Wang; Zhiqiang Zeng

doi:10.1007/s11595-012-0519-y

Journal of Wuhan University of Technology Materials Science Edition ›› 2012, Vol. 27 ›› Issue (4) : 640 -643. DOI: 10.1007/s11595-012-0519-y

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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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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.

Keywords

hot forging die / plasma spraying / plasma re-melting / plasma spray welding / thermo physical properties / Ni60-WC

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Junyuan Wang, Huachang Wang, Hongfu Wang, Zhiqiang Zeng. Preparation of Ni60-WC coating by plasma spraying, plasma re-melting and plasma spray welding on surface of hot forging die. Journal of Wuhan University of Technology Materials Science Edition, 2012, 27(4): 640-643 DOI:10.1007/s11595-012-0519-y

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