The method for producing hard alloys with an ultrafine structure includes mixing the starting components, granulation, forming the billet by pressing in closed molds, pretreatment, and sintering. The pretreatment of the billets – annealing – is carried out in the temperature range from 800 to 900 °C with isothermal holding for at least 2 hours. Subsequent sintering is carried out in a temperature gradient field by high-speed induction heating at a temperature of at least 1350 ºC with the formation of a cobalt melt zone of 5 to 7 mm.
The utility model belongs to the field of powder metallurgy, namely, it concerns the production of hard alloys by methods of induction zone melting of a billet, and can be used in mechanical engineering for the production of machine parts from hard alloys.
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