High-Velocity Oxygen Fuel-Sprayed WC-10Co4Cr Coatings on AISI 4135 Steel Substrate: Tensile and Fatigue Properties

In most studies of WC-based cermet coatings, attention has been given to the erosion, corrosion and wear resistance of the coatings. However, there have been a few studies highlighting the effect of spray WC-based cermet coating on the mechanical properties of the coating system. In this paper, AISI 4135 steel was used as the substrate to prepare WC-10Co4Cr coating by High-Velocity Oxygen Fuel technology (HVOF), and the tensile and fatigue properties of the HVOF-sprayed WC-10Co4Cr coating system were studied. This study showed that the WC-10Co4Cr coating degraded the tensile properties of the coating system, and with thicker coatings, this trend was more obvious. In addition, the fatigue life under different loads of the coating system was declined by spraying WC-10Co4Cr coating.

Automated summary

Most studies on WC-based cermet coatings have focused on their erosion, corrosion, and wear resistance. However, there is limited research on the effect of WC-based cermet coatings on the mechanical properties of the coating system. In this study, a WC-10Co4Cr coating was prepared using High-Velocity Oxygen Fuel technology (HVOF) on AISI 4135 steel substrate, and the tensile and fatigue properties of the HVOF-sprayed WC-10Co4Cr coating system were investigated. The results showed that the WC-10Co4Cr coating degraded the tensile properties of the coating system, with a more noticeable effect observed with thicker coatings. Additionally, the fatigue life of the coating system decreased under different loads when sprayed with WC-10Co4Cr coating.