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.