Petrenko V. Development of new principles of technological process control and construction of an ESR automatic control system.

The dissertation is focused on the electroslag remelting technology developing, especially on the control of the consumable electrode immersion in to the slag pool during remelting process. It is clearly showed that in case of similar conditions of ingot remelting the best metallurgical quality requires to minimize the depth of a consumable electrode immersion in to the slag pool and that immersion should be about 5-10mm. The special laboratory equipment was developed for direct and indirect measuring of the ESR technological parameters with the frequency up to the 100Hz. Such equipment was the basement for detecting such measurable directly parameters as an actual weight of a consumable electrode, ingot being melted, electrode immersion etc. Proposed and developed ESR control system on the base of so known swing – control, other words on the base of the special deviation of various technological parameters due to the artificial disturbance of a consumable electrode. Swing – control basis proposed for reconstruction of the old ESR equipment including main Ukrainian ESR furnaces OKB-1065.