METHOD FOR ELECTRON AND BEAM REMELTING POROUS ACTIVE METAL

A method for electron and beam remelting porous active metal comprises delivery thereof in the form of compact block of flat section to the zone of action of electron beams for preliminary heating, at that temperature thereof is maintained at the level providing degassing metal and evaporation of volatile admixtures, and working pressure in the vacuum chamber is not higher than 13 Pa with subsequent melting to the intermediary capacity, which has a form of compact block round section bloom, which is performed at the working pressure not lower than Pa, at that the rate of evaporation ( ) of porous metal is preset from the ratio of , where - compact block mass, kg; - ingot mass, kg; - total area of evaporation, m2; - melting duration, year, refining metal in the intermediary capacity, discharge of liquid metal to crystallizer and shaping ingot.