PROCEDURE FOR INGOT VACUUM-ARC MELTING

摘要

FIELD: metallurgy. ^ SUBSTANCE: according to procedure of ingot vacuum arc melting surface of liquid metal bath is influenced with arc discharge of modulated frequency. Frequency modulation of arc discharge is carried out with reverse source of current of arc with frequency of 0.1-10 Hz by reversing its polarity. Frequency modulation of arc discharge with low current is carried out by effecting electric arc with magnetic field generated with solenoid wound on crystalliser and with its current source. Modulations of surface of liquid bath of a formed ingot are produced by modulation of arc discharge with magnetic field of solenoid. ^ EFFECT: increased output of accepted product due to improved melting side surface of ingots and reduced defects of liquation origin. ^ 5 cl, 2 ex