Modeling electromagnetic processes in direct current electroslag remelting

Abstract

This article is devoted to the study of an important problem which arises during electroslag remelting when alternating current is converted to direct current. This problem arose in the second half of the last century but has not yet been solved, at least theoretically. However, experimental attempts to resolve it have always existed and continue to this day; moreover, they are quite successful. Due to the difficulties of studying physical phenomena in such processes, it is prudent to use mathematical modeling, in particular, using Maxwell’s theory of electromagnetism. The solution to the problem is to find the features of the behavior of electromagnetic fields in pools of slag melt. We analyzed the literature on this topic and formulated a number of hypotheses. Examination of these hypotheses using mathematical methods will allow for greater success in the direction of accepted assumptions. Rejected hypotheses are not subject to further consideration, thereby achieving significant savings in material and financial resources. Modeling is based on the Maxwell system of electromagnetism. The calculations revealed significant anisotropy in the redistribution of the main technological parameters, which corresponds to experimental data. Non-coaxialness sources of electric current lead to an increase in this anisotropy phenomenon.