Achieving longer service times of forming tools is a key customer requirement. Processes employing plasma spray techniques have been proved to be an efficient way to fulfill this demand. The aim of this investigation is to analyse the influence of the electric current level on the coating properties deposited onto steel substrates. Morphological and tribological analyses were carried out to evaluate the variation of coatings properties. Results showed higher hardness and smaller friction coefficients for the tungsten carbide-based coatings than for the chromium carbide based ones. Both materials presented alike hardnesses at an electric current range of 500 to 600 A, whereas the highest hardness was identified at 450 A for WC–12Co coatings. Slight variation on the coefficient of friction was reported for Cr3C210(Ni20Cr), while the lowest value was found for the tungsten carbide-based coatings at 600 A.
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