The Influences of Ultrasonic Vibrations on Laser Cladding Ni60/WC-TiO2+La2O3 Composite Coating

• Published in: Materials Vol. 16; no. 19; p. 6356
• Main Authors: Huang, Xu, Chen, Yanchun, Jiang, Jibin, Lian, Guofu, Chen, Changrong
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 22-09-2023; MDPI
• Subjects: Aspect ratio; Cavitation; cladded powders; Coefficient of friction; Dilution; Ethanol; Friction; Friction reduction; Influence; Lanthanum oxides; Laser beam cladding; laser cladding; Lasers; Mechanical properties; Microhardness; Molding (process); Morphology; Phase composition; Porosity; Process parameters; Protective coatings; rare earth oxide; Solidification; Titanium alloys; Titanium dioxide; Tungsten carbide; Ultrasonic vibration; ultrasound; Vibration; vibration frequency; Wear resistance
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma16196356

The optimal process parameters of ultrasonic-assisted processing were studied to further improve the molding quality and mechanical properties of Ni60/WC-TiO2+La2O3 composite coating. A single-factor experiment was used to explore the influences of ultrasonic vibration frequencies on Ni60/WC-TiO2+La2O3 composite coating. The microstructure, elemental composition, phase composition, hardness, and wear resistance of the coating were studied using scanning electron microscopy (SEM), an X-ray diffractometer (XRD), an energy spectrometer, a microhardness meter, a friction and wear tester, and other equipment. Ultrasonic vibrations significantly improved the problems of pores in the coating, and the porosity was reduced from 0.13 to 0.014%. When the vibration frequency was 32 kHz in the experiment, the aspect ratio of the coating was optimized from 2.06 to 2.48, the dilution rate increased from 5.60 to 5.79%, the hardness increased from 960.25 to 988.45 HZ1.0, and the friction coefficient was reduced from 0.34 to 0.27. The coating performance was significantly improved, and the research results provide a reference for preparing excellent Ni60/WC-TiC+La2O3 composite coating.