Keyword: «ultrafine powder additives»

The article presents the results of studies of the mechanical properties of prototypes of hard-alloy drilling inserts with ultrafine additives of magnesium spinel. In the composition of the prototypes, the percentages of ultrafine additives of magnesium spinel varied from 0.1% to 1.0%. The formation of a homogeneous structure in the volume was revealed. The absence of conglomerates of ultrafine additive powders on the surface was revealed. The work aims to analyze the mechanical properties of prototype drill inserts made of tungsten-cobalt alloys, which differ in the content of an ultrafine additive. In work, the instruments of the Central Collective Use Center of the Federal Research Center of the Yankee Scientific Center of the Siberian Branch of the Russian Academy of Sciences and CJSC "DV – Technology" were used. It has been shown that adding ultrafine powder of magnesium spinel to the charge composition of the tungsten-cobalt matrix increases density and hardness.