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采用超音速火焰喷涂(HVOF)分别制备了微米及亚微米WC-12Co金属陶瓷复合涂层,采用超声振动汽蚀装置研究了涂层的抗汽蚀性能,使用SEM微观分析的方法对蚀坑的形貌进行了观察,并对汽蚀机理做了初步探讨。结果表明:亚微米WC-12Co涂层表现出优异的抗汽蚀性能,汽蚀率仅为微米涂层的70%左右,涂层中亚微米WC的存在是涂层抗汽蚀性能提高的主要因素。
The WC-12Co composite coatings with micron and sub-micron WC-12Co coatings were prepared by HVOF. The cavitation erosion resistance of the coating was studied by ultrasonic vibration cavitation apparatus. The microstructure of pits Morphology was observed, and cavitation mechanism made a preliminary discussion. The results show that the submicron WC-12Co coating exhibits excellent cavitation erosion resistance, and the cavitation rate is only about 70% of that of the micron coating. The submicron WC in the coating is the main factor to improve the cavitation erosion resistance of the coating factor.