In this study, Cr3C2+25NiCr hardmetal powder is mixed with small amounts of NiCr and CoCr powder and sprayed on steel substrates with a high-velocity oxyfuel torch. High-temperature friction tests are used to assess tribological performance and investigate the formation of tribolayers. The results of the study show that the friction coefficient of HVOF sprayed hardmetal coatings can be reduced by adding small amounts of low-friction powder to the feed stocks prior to spraying. The reduction in friction is the result of a tribochemical reaction that occurs on friction surfaces under contact conditions involving high temperature, pressure, and sliding speed. Paper includes a German-language abstract.

chromium carbide-nickel chromium powders, hardmetal coatings, high-velocity oxyfuel spraying, surface roughness, tribological properties
This content is only available as a PDF.
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
High-velocity oxyfuel spray coating Friction and wear properties Surface roughness Sliding wear testing Chromium carbide cermets
Issue Section:
Poster Session: Coating Properties—Test, Measurement, and Characterization
You do not currently have access to this content.