Investigation of wear resistance of high velocity oxy-fuel sprayed WC-Co and Cr3C2-NiCr coatings
Authors
E. Zdravecka
J. Suchanek
J. Tkacova
J. Trpcevska
K. Brinkienė
Abstract
In the present work, the comparative investigation of wear resistance was carried out for two types of thermal spray coatings – tungsten carbide-based (WC-Co) and chromium carbide-based (Cr3C2-NiCr) coatings deposited by high velocity oxy-fuel (HVOF) spraying process. The wear mechanism was investigated in the interrelationship with wear particles formation. Wear resistance of coatings was evaluated by tribotester FALEX T-09. The wear debris after scuffing were studied by atomic force microscopy. Metallographical investigation was carried out using opti-cal microscopy and scanning electron microscopy (SEM). X-ray energy dispersion microprobe analysis was used for the investigation of the composition of coatings. The ob-tained results show that WC-Co coatings are characterized by better tribological characteristics. Wear resistance of coatings was connected with the microstructure.