November/December AMP_Digital

iTSSe TSS A D V A N C E D M A T E R I A L S & P R O C E S S E S | N O V E M B E R / D E C E M B E R 2 0 1 8 4 9 iTSSe TSS FEATURES OF COATINGS OBTAINED BY SUPERSONIC LASER DEPOSITION A.I. Gorunov The three types of coatings that can be deposited by su- personic laser deposition, namely coatings built without the melting of processed powder particles, coatings built from molten particles, and coatings made from molten particles with solid particles embedded in the coating, are discussed. For instance, with no melting of the powder material, a tita- nium alloy coating without transformation of the structure and with a uniform distribution of the chemical elements in the coating cross-section was obtained. Self-fluxing coatings (NiCrCBSiFe) with high hardness were achieved by melting the powder and mixing it with the substrate. The mixing of the coating metal with the substrate metal led to a significant increase in the concentration of the main alloying elements in the coating-substrate interface. X-ray diffraction analysis also showed that mixing the NiCrCBSiFe coating with a medi- um-carbon steel substrate led to the formation of new Fe x Ni phases, while their concentration decreased through the coat- ing thickness (Fig. 5). Fig. 5 — Mapping in the region of NiCrCBSiFe particles embedded into the coating and the steel substrate. JTST HIGHLIGHTS 15