HVOF sprayed Cr3C2-NiCr cermet coating was investigated to improve the erosion resisting performance of the coal burning boiler tube exposed by fly ash erosion. SUS 310S stainless steel substrate was used to examine the effect of surface treatments. HVOF coating was compared with the calorizing treatment. Coating microstructure, mechanical properties such as hardness and sand blast erosion resistances, and high temperature oxidation resistance were examined. Erosion resisting performance and durability of the HVOF sprayed Cr3C2-NiCr cermet coating were superior to those obtained from the calorizing surface treatment.

coal burning boiler tubes, Cr3C2-NiCr cermet coating, erosion resistance, hardness, high-velocity oxyfuel spray coating, microstructure, oxidation resistance, surface treatment
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Copyright © 2004 ASM International. All rights reserved.
2004
ASM International
Topics
Microstructure Boilers High-velocity oxyfuel spray coating Surface treatment Oxidation resistance Erosive wear resistance Hardness Chromium carbide cermets
Issue Section:
Applications
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