About the article
L.E. AFANASIEVA, K.A. SAKHAROV
Metal-ceramic NiCrBSi-WC coating on 40X structural steel has been obtained by laser powder surfacing method. It is shown that cladding of high-alloyed powder mixture with the help of multichannel laser forms practically porous coating and provides metallurgical alloying with the base. It is noted that the fusion line is homogeneous in structure, and it confirms high homogeneity of integral heat input during cladding by this type of laser. It is established that due to high speeds of heating and cooling of the melt during powder laser cladding the dissolution of WC carbides in the melt bath is insignificant. No emission of brittle phase at the carbide-metal matrix interface was detected.
microstructure, metal-ceramic coating, laser powder surfacing, multi-channel laser.