Formation of hardmetal coating on construction carbon steel surface by using interlayer consisted of titanium carbide and cobalt powder blend
The problems of hardmetal coating formation on steel surface are considered in the paper. It was shown that applying additional interlayer consisted of titanium carbide particles with cobalt binder allows to make coating structure which is closed to hardmetals. It was stated that optimal cobalt content in the interlayer is equal to 40 %. In the specimens produced by sintering "steel 20 - (60 % TiC + 40 % Co) - hardmetal blend VK6» the presence of the interlayer allows to reduce volume fraction of brittle phase M6C in the coating and to provide the level of microhardness of the latter is equal to 12000 MPa.