Abstract：Submicron and conventional WC-12Co coating were deposited by HVOF. The cavitation erosion resistance of the coating was studied by ultrasonic vibration cavitation equipment. Cavitation holes were observed by SEM and cavitation mechanisms were explored. The results show that the submicron WC-12Co coating demonstrates more excellent performance in cavitation erosion, cavitation rate is approximately 70% of the conventional coating. The existence of submicron WC grain in the coating is an important factor, which influences the cavitation erosion resistance of the coating.
Key words：HVOF; WC-12Co coating; cavitation erosion
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