CHARGE FOR MAKING ELECTRODES FOR ELECTRIC SPARK ALLOYING AND METHOD FOR MAKING SUCH ELECTRODES Russian patent published in 1994 - IPC

FIELD: powder metallurgy. SUBSTANCE: charge contains (mass % ): nonmetallic material (4-28); binding material (10-50); modifying additives (1-10); metal of (IV-VI) groups - the balance; the modifying additives are nitrides, chalcogenides, oxides. The method comprises steps of mixing components of the charge, heating a gage till 50-500 C, initiating a burning process and extruding a product of the burning process through a heat-insulated cone die with an angle of its cone portion, equal to 120-150 degrees into the gage, having inner diameter, consisting (1,05-1,2) of the die diameter; after the extrusion process holding the material in the gage over 0,1-15 minutes. EFFECT: enhanced quality of electrodes. 3 cl, 2 tbl