Preparation of Ni60-Cr₃C₂ coating by plasma spraying, plasma re-melting and plasma spray welding on W6Mo5Cr4V2

Abstract

In order to prepare heat-resistant inner layer of hot-forging die, plasma spraying, plasma remelting and plasma spray welding were adopted. Cr₃C₂ coatings of Ni-Based were prepared respectively with 10%, 20% and 30% Cr₃C₂ powder and W6Mo5Cr4V2 substrate. The coating microstructure analysis, the micro-hardness test, and the measurement of thermal parameters of coating were conducted. The experimental results show that the coating has the better thermo-physical property by using plasma spray welding method with the powder ratio of 90% Ni60 and 10% Cr₃C₂, and by this way the micro-hardness of coating can achieve 1100 HV.

Keywords

W6Mo5Cr4V2 / plasma spraying / plasma re-melting / plasma spray welding / thermophysical property / Ni60-Cr₃C₂

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