ELECTRODE MATERIAL FOR ELECTRIC-SPARK ALLOYING, AND A METHOD OF ITS MAKING Russian patent published in 1994 - IPC

FIELD: powder metallurgy. SUBSTANCE: electrode material has, % by weight: iron tungsten-carbide Fe₃W₃C-Fe₄W₂C 4-9; Fe₆W₆C 14-21; iron carbide 4-7; manganese silicides MinSi_x at 1 Mn₃C 1,7 1-3; manganese carbide CoWS_i 1,5-2,5; cobalt tungsten-silicide CoWSi 1,5-2,5; and tungsten carbide - the rest. Initial tungsten-containing charge is a tungsten concentrate containing, % by weight: tungsten oxides 45-72; iron 10-25; manganese 2-10; silicon 3-8. Source of tungsten concentrate: scheelite and/or wolfranite concentrate obtained from oxidized ores. To obtain electrode material for electric-spark alloying charged is pressed. Charge has, % by weight: Co 6-10; carbon 7-10, and tungsten-containing component - the rest. Source of tungsten-containing component: tungsten-containing concentrate containing, % by weight: tungsten oxide 45-72; iron oxide 10-25; manganese oxide 2-10, and silicon oxide 3-8. EFFECT: improved method of electrode material making. 2 tbl