Influence of Cr3C2-NiCr Feedstock Powder Characteristics on Deposition Efficiency, Coating Microstructure, and Abrasion Wear Resistance

摘要

Abstract This work assesses the influence of powder characteristics on the deposition efficiency, microstructure, and tribological properties of Cr3C2-NiCr coatings. Four commercial powders prepared by different methods were used for the study. All have a spherical morphology but vary in terms of porosity, carbide grain size, and flowability. The feedstocks were deposited on flat low-carbon steel substrates using a liquid-fueled HVOF torch mounted on an industrial robot. Deposition efficiency was measured along with coating hardness, Young’s modulus, and abrasive wear resistance. In addition, some of the coatings were heat treated and changes in microstructure and hardness were recorded.