Tungsten carbide in nickel based self-fluxing alloy overlays has been dominating hardfacing applications due to its excellent properties, namely extremely high wear resistance. Nevertheless, there are still applications and limits which tungsten carbide has not conquered. This study focuses on (TiW)C1-x which was deposited with several matrix materials and tested in wear, corrosion and impact resistance and benchmarked against tungsten carbide. Results for several other carbides such as (NbW)C1-x, (VW)C1-x, NbC1-x and TiC1-x overlays deposited by plasma transferred arc (PTA) and laser cladding (LC) will be presented and discussed. As a result of deposition trials and overlay testing, it was found that better thermodynamic stability of alloyed carbides allows them to be used in an iron based matrix and/or a matrix with a high chromium content, in applications requiring improved corrosion and oxidation resistance, better impact resistance and lower weight.

corrosion resistance, hardfacing, impact resistance, laser cladding, nickel based self-fluxing alloys, plasma transferred arc spraying, thermodynamic stability, tungsten carbide, wear resistance
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Copyright © 2017 DVS Media GmbH. All rights reserved.
2017
DVS Media GmbH
Topics
Laser cladding Hardfacing Plasma arc spraying Wear resistance
Issue Section:
Laser Cladding and Plasma Transferred Arc Processes
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