METHOD FOR FORMATION OF PARTICLES WITH HOMOGENOUS STRUCTURE IN PRODUCTION OF FINE-DISPERSED METAL POWDERS Russian patent published in 2022 - IPC B22F9/14 B22F9/08 B22F1/00 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, in particular to the production of powders of refractory materials or their alloys. It can be used as raw materials for the production of hard-alloy products and wear-resistant deposited coatings by powder metallurgy methods. To obtain fine-dispersed powder of refractory metal or alloy, a melt is dispersed in a vacuumized chamber by a centrifugal-arc method with the formation of particles. Formed particles are caught in a trap with material, a heat transfer coefficient of which is not less than a value calculated by the formula , where C is effective heat capacity of particle material in the temperature range of T₀-T_t, KJ/(kg·°K), v is a counting concentration of particles in trap material, 1/kg, T₀ is an initial temperature of a melt particle, °K, T_T is a temperature of trap material, °K, T_t is a final temperature of particle material, °K, d is a diameter of the particle, m, t is required time for cooling the particle to the set temperature T_t, s, is a density of particle material, kg/m³.

EFFECT: production of fine-dispersed homogenous powder particles with a stable homogenous structure, and elimination of their aggregation.

1 cl, 2 tbl, 1 ex, 1 dwg