The wear resistance of thermal spray the tungsten and chromium carbides coatings

Purpose: The objective of the work concerns of wear-resistance of different kinds of thermal spray coatings covering industrial fun blades. The coatings were sprayed onto the fun blades by Plasma Spraying and High Velocity Oxygen Fuel Spraying (HVOF) methods. The Cr3C2, WC and also its compositions were sprayed into the fun blades. The coatings were tested in industry conditions and the effect of influence of centrifugation industry emissions on the stage of the wearing after the exploitation was compared for deposited coatings. Design/methodology/approach: The investigations of coating microstructures by optical microscopy (MO) and transmission electron microscopy (TEM) were performed. The examination of fun blades after the exploitation and the analysis of the obtained results was correlated with the performed microstructure observations and microhardness data of coatings. Findings: The microstructures of Cr and W carbides coatings were observed and analyzed. The micro hardness of the sprayed coatings was compared. The coatings were evaluated from the point of view resistance against the wear. Practical implications: The performed investigations provide information, which kind of carbide coatings characterize the most wear resistance in the industrial conditions. Originality/value: It was assumed that HFOV coats have more uniform microstructure, higher microhardness, which could suggests better resistance against the wear and grindability.