South Ural State University, (Chelyabinsk, Russia):

V. E. Roshchin, e-mail: Roshchinve@susu.ac.ru

N. V. Malkov

A. V. Roshchin

There are economically and technically effective technologies of steel producing with low level of sulfur, phosphorous, oxygen and hydrogen in metal. As a consequence, there is no special need of refining metal from impurities in electroslag remelting. Remelting primary objective is to obtain a favorable structure while maintaining of low hydrogen content and increasing the technical and economic evidence of the remelting process itself. The new generation flux of low base-to-acid ratio based on worked -out metallurgical slag was developed. The physical, physico-chemical, technological properties of this flux, structure and properties of the investigated weld metal have been studied in laboratory and industrial conditions. The technical parameters of the process of ESR have been evaluated. It was shown that proposed flux is workable and its application provides consistently ESR process with a high speed, reduces electricity consumption up to 1,5 times and provides welding of metals with a good surface quality. Proposed flux protects the weld metal better from hydrogen saturation than widely used CaF₂ – Al₂O₃ flux ANF6. The mechanical properties of cast metal, welded under this flux are close to forged steel after remelting under CaF₂ – Al₂O₃ flux.

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3. Roshin V. E., Malkov N. V., Shvyrkunov V. V. Vyazkost i elektroprovodnost maloftoridnykh nizkoosnovnykh rasplavov tipa domennykh shlakov (Viscosity and electrical conductivity of low fluorine low bace-to-acid melts of the sort of blast furnace slags). Spetsialnaya elektrometallurgiya = Special electometallurgy. 1988. Vol. 66. P. 38–41.
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