Study of HVOF Parameter Influence on Microstructure and Wear Resistance of Cr3C2-25NiCr Coatings

Abstract

The objective of this study is to assess the wear resistance, hardness, and porosity of HVOF-sprayed Cr3C2-25NiCr coatings applied using different oxygen and C3H8 flow rates. In the experiments, six coating samples were prepared and subjected to various tests. The sample deposited with the highest oxygen flow rate and lowest fuel-oxygen ratio exhibited the lowest porosity and highest microhardness. In general, the higher the surface hardness, the better the erosion and cavitation wear resistance. The most intense wear occurred during the erosion test conducted with an impingement angle of 60°.