METHOD FOR PRODUCING POWDERS OF MOLYBDENUM OR ITS COMPOSITES WITH TUNGSTEN Russian patent published in 2006 - IPC B22F9/18 C22B34/30 C22C1/10 

FIELD: powder metallurgy, possibly production of finely dispersed powder of molybdenum, its composites with tungsten, namely for producing hard alloy materials on base of molybdenum and tungsten.

SUBSTANCE: method provides production of molybdenum and its composites with tungsten at temperature no more than 900°C and also production of materials in the form of finely dispersed powders. Method comprises steps of reducing compounds of molybdenum and tungsten (MoO₃ and WO₃) by metallic magnesium in medium of melt chlorides such NaCl, KCl or carbonates such as Na₂CO₃, K₂CO₃ or their binary mixtures such as NaCl - KCl, Na₂CO₃ - K₂CO₃, NaCl - Na₂CO₃, KCl - K₂CO₃ at temperature 770 -890°C. According to results of fineness analysis produced powder of molybdenum represents homogenous material having 80% of particles with fraction size 2.2 - 3 micrometers. Composition material depending upon Mo content includes particles with fraction size 5 - 15 micrometers.

EFFECT: enhanced efficiency of method.

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