Properties and Microstructure of HVOF Thermally Sprayed Carbide Based Coatings

Abstract:

The current study is focused on deposition of different carbide based powders as WC/10Co/4Cr, Cr3C2/25NiCr, CrC/37WC/18M using High Velocity Oxygen Fuel (HVOF) spraying technique onto the surface of low carbon steel substrates. The obtained coatings were characterized by means of X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) to study their phases and morphology. Hardness and porosity values of the coatings were also measured. The sliding wear behavior was evaluated using the pin-on-disk method and the corrosion resistance was determined by open cell potential measurements and salt spray tests. Comparative results of the investigated samples showed that the WC/10Co/4Cr coating had the best wear properties and the Cr3C2/25NiCr coating had the best corrosion resistance.

• Periodical: Solid State Phenomena (Volume 216)
• Pages: 261-266
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.216.261
• Online since: August 2014
• Authors: Iosif Hulka*, Ion Dragoş Uţu, Viorel Aurel Şerban, Petri Vuoristo, Kari Niemi, Heli Koivuluoto
• Keywords: Cermet, Corrosion Resistance, HVOF Coatings, Wear Behaviour

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