Hardmetal coatings prepared by high-velocity oxy-fuel (HVOF) spraying represent an advanced solution for surface protection against wear. The work presented in this paper focused on the comparison of the tribological behaviour of WC-Co, Cr{sub}3C{sub}2-NiCr and (Ti, Mo)(C, N)-NiCo hardmetal coatings under dry sliding wear conditions at room and elevated temperatures (at 500℃ and 700℃). The friction properties of these HVOF-sprayed coatings were studied in detail. The progression of the coefficient of friction (CoF) was measured during the pin-on-disc tests at the different temperatures. The mechanisms of wear and the heat-related changes in surface roughness and microhardness of the coatings were studied.
展开▼
