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Houdkova, S.
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Topics
Publications (6/6 displayed)
- 2022Dynamic Impact Wear Analyses of Selected Cobalt Based HVOF Sprayed Coatings
- 2018Slurry and dry particle erosion wear properties of WC-10Co4Cr and Cr3C2-25NiCr hardmetal coatings deposited by HVOF and HVAF spray processes
- 2017Effect of Nozzle Geometry on the Microstructure and Properties of HVAF Sprayed Hard Metal Coatings
- 2016Tribological Properties of Hard Metal Coatings Sprayed by High-Velocity Air Fuel Processcitations
- 2015Tribological properties of hard metal coatings sprayed by high velocity air fuel process
- 2011Comparative study of thermally sprayed coatings under different types of wear conditions for hard chromium replacement ; Vergleichende Untersuchung thermisch gespritzter Deckschichten bei verschiedenartigen typischen Verschleißbedingungen für Hartchrom-Substitutioncitations
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document
Slurry and dry particle erosion wear properties of WC-10Co4Cr and Cr3C2-25NiCr hardmetal coatings deposited by HVOF and HVAF spray processes
Abstract
Thermally sprayed hardmetal coatings were produced to provide improved erosion wear compared to conventional cast GX4CrNi13-4 martensitic steel (CA6NM) used in hydro turbine components. Sprayed coatings and reference materials were tested with high-speed slurry pot tester using either fine or coarse quartz as the erosive media. Additional erosion tests were carried out with centrifugal dry erosion tester. Tungsten carbide based coatings provided the highest wear resistance due to the high hardness and even distribution of the fine carbide particles. The cast 13-4 steel samples experienced up to 180 times higher wear rates in fine quartz slurry and up to 36 times higher wear ratesin coarse slurry compared to the sprayed coatings.