PROCEDURE FOR CONTROL OVER PROCESS OF VACUUM ARC WELD

摘要

FIELD: metallurgy. ^ SUBSTANCE: procedure for control of process of vacuum arc weld consists in synchronous measurement of voltage on arc and pressure in furnace, and in correction of these values considering rate of transfer of consumable electrode relative to padded ingot. Internal surface of a crystalliser is cleaned from fusible sublimates by means of effect of cathode spots occurring on reverse polarity of arc discharge current in the region of the padded ingot and a wall of the crystalliser. Simultaneously arc gap is increased at 0.15-0.5 diametre of the crystalliser. Arc discharge is additionally effected with magnetic field. ^ EFFECT: elimination of sublimates on walls of crystalliser with successive evaporation of sublimates into volume of chamber of vacuum arc furnace and their evacuation with vacuum system. ^ 2 cl, 3 dwg, 2 ex