Abstract
The paper presents the results of determining rational composition of composite material based on PRX11G4SR powder with fraction of 40–64 microns with addition of titanium carbide filler (TiC) for plasma spraying coatings, providing maximum microhardness and wear resistance. For this purpose, a multivariate experiment on the central composite rototable plan was designed and implemented. The following independent variables were selected: filler size (30–70 microns) and filler concentration (10–30 %). Adhesion strength of resulting coating to base of the samples was taken as response function. The study analyzed morphology and chemical composition of the obtained coating from iron-based powder and titanium carbide particles. It outlined aspects that explain reasons for improving resulting coating microhardness during plasma spraying.
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