Huang Xu, Chen Yanchun, Jiang Jibin, Lian Guofu, Chen Changrong
Fujian Key Laboratory of Intelligent Machining Technology and Equipment, Fujian University of Technology, Fuzhou 350118, China.
Department of Mechanics, School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China.
Materials (Basel). 2023 Sep 22;16(19):6356. 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-TiO+LaO composite coating. A single-factor experiment was used to explore the influences of ultrasonic vibration frequencies on Ni60/WC-TiO+LaO 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 HZ, 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+LaO composite coating.
为进一步提高Ni60/WC-TiO+LaO复合涂层的成型质量和力学性能，研究了超声辅助加工的最佳工艺参数。采用单因素实验探究超声振动频率对Ni60/WC-TiO+LaO复合涂层的影响。利用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、能谱仪、显微硬度计、摩擦磨损试验机等设备研究了涂层的微观结构、元素组成、相组成、硬度和耐磨性。超声振动显著改善了涂层中的气孔问题，孔隙率从0.13%降低到0.014%。实验中当振动频率为32kHz时，涂层的长径比从2.06优化到2.48，稀释率从5.60%提高到5.79%，硬度从960.25HZ提高到988.45HZ，摩擦系数从0.34降低到0.27。涂层性能得到显著改善，研究结果为制备优异的Ni60/WC-TiC+LaO复合涂层提供了参考。
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