Thermal spray coatings are an effective means for improving the cavitation resistance of hydroturbine components, especially in on-site repair situations. In this study, WC-CoCr cermet coatings are deposited by HVOF spraying and their microstructure, hardness, and cavitation behavior are assessed. The coatings exhibit better cavitation resistance than stainless steel with an erosion mechanism that leaves wrinkles and craters that correspond to specific erosion stages.

cavitation resistance, hardness, high-velocity oxygen fuel spraying, hydroturbine components, microstructure, WC-CoCr cermet coatings
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2019
ASM International
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Oerlikon Metco Young Professionals Session
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