PROFILES OF TEMPERATURE, VOLTAGE, AND LOCAL HEAT GENERATION IN THE SLAG PHASE AND METAL POOL OF AN OPERATING ELECTROSLAG REMELTING UNIT.

Abstract

Local temperature and voltage in the molten flux and metal pool beneath the electrode were measured directly by a bare hot junction of a W-WRe thermocouple. Results are plotted for plan's carbon steel remelting. It is suggested from the experimental results that refining processes, not only slag-metal reactions but also inclusion removal, take place mainly at the metal pool/flux interface. Because the temperature in the flux was uniform even with the localized heat generation, a violent convection should exist in the flux. One of the driving forces for the convection, the pinch effect of the current, was calculated. The selection of the proper voltage and current necessary for a metal pool of the proper shape is indicated in an I-V (current-voltage) diagram.