Microstructure and Properties of High Velocity Oxy-Fuel Sprayed Micro-Nano WC-Cr3C2-CoNi Coating

• Published in: Cai liao bao hu Vol. 56; no. 4; pp. 22 - 28
• Main Author: ZHU Zi-wei, CHEN Qing-yu, YANG Chao, JI Gang-chang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Materials Protection 01.04.2023
• Subjects: high velocity oxy-fuel spraying|micro-nano dual-carbides|wc-cr3c2-coni particle|deposition behavior|coating microstructure|properties
• ISSN: 1001-1560
• DOI: 10.16577/j.issn.1001-1560.2023.0079

For studying the deposition behaviour of dual-carbides cermet particles on coating microstructure and properties，the surface morphology and cross-sectional microstructure of the original powder and the flat particle on the low-carbide steel substrate were analyzed，and the microstructure，phase constitution and properties of HVOF sprayed micro-nano WC-Cr3C2-CoNi coating were investigated systemically.Results showed that the particles deposited on the substrate showed a caky shape with smooth and convex surface，radial sputtering streaks appeared around the particles，and the thickness of flat particles was much smaller than their radial dimensions.In addition，the section microstructure of the coating presented certain lamellar characteristics，and the interfaces between flat particles，hard phase and bond phase，flat particle and substrate and different hard phases bonded well.The coating had the main phase of WC，some decarburized phases，and the amorphous phase of Cr2O5.Moreover，the microhardness，elastic modulus，fra