Effect of the Coating Thickness to Ti(C、N)/Ni60A Composite Coating by Ultrasonic-assisted Argon-arc Clad Injection

摘要

New ultrasonic-assisted argon-arc clad injection technology was adopted, and Ni60A was as cladding powder, TiC, TiN, WC, and Co powder as spraying powder, thus Q235 steel plate was strengthened with Ti(C、N) particle reinforced the nickel wear-resistant coating. The influence of the coating thickness to the organizational structure, the phase and composition, the reinforced phase, the hardness and wear resistance of the cladding layer was analysed by presetting different thickness of the surface coating. The results showed that for the secondary effects of acoustic cavitation and acoustic streaming produced by the high energy ultrasonic spreading in the molten pool, the wettability between the particles and the melt was improved, the reaction in situ was promoted, the strengthening phase dispersed, and the gas escaped easily. When the thickness of the coating is 0.8, 1.2 and 1.6mm, 1.2mm thicknesses of the specimen has a good appearance. The reinforced particulates distribute uniformly. The hardness is 7 times than that of the Q235 steel, and the wear resistance is 14.3 times than that of the steel matrix. The comprehensive performance is the best.