Microstructure and properties of WC particulate reinforced Ni-based composite coatings formed by argon-arc cladding

In order to improve the wear-resistance properties of carbon steel, WC particulate reinforced Ni-based composite coatings was fabricated on Q235 steel substrate by using argon-arc cladding and using the mixed-powders of Ni60A and cast tungsten carbide powder as the raw materials.The bonding state and microstructure of the coatings were observed with metallography microscope model XJP-200 and scanning electronic microscope model KyKy-2800, the microhardness of the cross section of the coatings was tested with the hardmeter of model MH-6, the abradability of cladding coating to 65Mn steel quenched and tempered was used to compare wear tester model MPX-200, and the abrasion mechanism of the claddings was analyzed.The results indicate that microstructure of the claddings is uniform, continuous and defect-free;the strength, toughness and wear resistance of the claddings are excellent;bonding between the coating and the carbon steel substrate is ensured by the strong metallurgical interface.The claddings can be used to strengthen the surface of the wear-resistant parts.