Performance of abrasive wear of Cr3C2-NiCr coatings sprayed by HVOF

The abrasive wear behavior of high velocity oxy-fuel (HVOF) sprayed Cr₃C₂-25%NiCr coatings deposited in different conditions was investigated by wet sand rubber wheel abrasive wear tester using three kinds of abrasives (brown alumina, Jin Gang sand and Hu Kou sand). The abrasive wear mechanism was discussed. The results show that weight loss of HVOF sprayed Cr₃C₂-25% NiCr coating after worn with three kinds of sand is different. The weight loss of the coating after worn with alumina sand is the highest. Comparatively, the weight loss of the coating after worn with the Hu Kou sand is the lowest. The weight loss of the coating after worn with the Jin Gang sand is lower than that with alumina sand and higher than that with Hu Kou sand. However, the weight loss of the coating worn using three kinds of sands presents a liner increment with the increment of grinding distance. The coating deposited in moderate flow of propane exhibit higher wear resistance.