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2158 |
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Comparative analysis of anti-cavitation and abrasion resistance properties of two different detonation coatings |
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Kefeng Huang / SuZhou Nuclear Power Research Institute, China Shuhui Wu / SuZhou Nuclear Power Research Institute, China Jinpeng Fang/ Hunan Research Academy of Environmental Sciences, China Zekun Liu/ SuZhou Nuclear Power Research Institute, China Lin Ye/ SuZhou Nuclear Power Research Institute, China Yilin Shi/ SuZhou Nuclear Power Research Institute, China Song Yin/ SuZhou Nuclear Power Research Institute, China |
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Combined damage of cavitation and abrasion is one of the serious problems that affect lifetime and performance on hydraulic machineries and its components. Thermal spraying as a surface hardening and protection technology is required to apply to hydraulic components, such as water turbine and radial flow pump, in general. Detonation sprayed coatings with high abrasion resistance are one of the promising solutions as the protective coatings against combined damage of cavitation and abrasion under solid-liquid double phase liquid conditions. In this study, NiCr-Cr3C2 and WC12Co coatings on the No.45 steel substrate surface have been formed by detonation spraying with the same technological parameter and their properties such as microstructure and microhardness have been studied. The cavitation and abrasion behavior of coatings and the substrate has been investigated using a self-manufactured rotating disk system. Anti-cavitation and abrasion resistance properties have been illustrated and analyzed with the substrate by the cumulative mass loss curves. The results indicate that, the anti-cavitation and abrasion resistance properties of NiCr-Cr3C2 coating are the best. |