This study examines the high-temperature erosion characteristics of carbide cermet coatings produced by HVOF spraying. The coating materials tested include three Cr3C2 cermets, WC, and WC-Cr3C2. A low carbon steel and an arc-sprayed iron-base coating are also tested for reference. A nozzle-type elevated-temperature erosion tester is used to spray bed ashes collected from several coal-fired boilers. Coating samples are analyzed and compared based on composition, surface morphology, erosion wastage, and hardness relative to that of the bed-ash particles. From the comparisons, a number of conclusions are drawn. Paper includes a German-language abstract.

chromium carbide cermet coatings, erosion resistance, erosion wastage, high velocity oxyfuel spraying, tungsten carbide coatings
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Copyright © 2002 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
2002
Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH
Topics
Coal-fired boilers High-velocity oxyfuel spray coating Simulated service testing Solid-particle erosion testing Carbide and carbonitride cermets
Issue Section:
Poster Session: Coating Properties—Test, Measurement, and Characterization
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