Carbide coating preparation of hot forging die by plasma processing

Abstract

To meet the performance requirements of hot forging die heat resistant layer, the Ni60-SiC coating, Ni60-Cr₃C₂ coating, and Ni60-WC coating were prepared using W6Mo5Cr4V2 as substrate material with 30%SiC, 10%Cr₃C₂, 30%WC powder by means of plasma spraying and plasma spray re-melting and plasma spray welding, respectively. Microstructure of each carbide coating was analyzed, micro-hardness was tested, and mainly thermal parameters of coating were detected. The experimental results show that using plasma spray welding, the performance of 70%Ni60/30%SiC powder is the best, and its micro-hardness can achieved 1100HV, showing good thermal-physical property.

Keywords

hot forging die / plasma processing / Ni60-SiC / Ni60-Cr₃C₂ / Ni60-WC

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