Study on the Thermal Spray Process and the Properties of WC-12Co and WC-10Co-4Cr Coatings

WC-Co and WC-Co-Cr coatings were deposited on Q345 steel substrates by HVOF and plasma spraying. Coating hardness was measured and corrosion and wear tests were conducted. In terms of hardness and density, the HVOF sprayed WC-Co coating is shown to be superior to its plasma sprayed counterpart. The WC-Co-Cr coatings, on the other hand, exhibited better wear and corrosion resistance, especially the coating produced by HVOF spraying.