Comprehensive model for a slag bath in electroslag remelting process with a current-conductive mould

Fu-bin Liu1), Xi-min Zang2), Zhou-hua Jiang 1), Xin Geng1), and Man Yao3) 1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China 2) School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshang 114051, China 3) School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

摘 要：A mathematical model was developed to describe the interaction of multiple physical fields in a slag bath during electroslag remelting （ESR） process with a current-conductive mould. The distributions of current density, magnetic induction intensity, electromagnetic force, Joule heating, fluid flow and temperature were simulated. The model was verified by temperature measurements during remelting 12CrMoVG steel with a slag of 50wt%-70wt% CaF2, 20wt%-30wt% CaO, 10wt%-20wt% Al2O3, and ≤10wt% SiO2 in a 600 mm diameter current-conductive mould. There is a good agreement between the calculated temperature results and the measured data in the slag bath. The calculated results show that the maximum values of current density, electromagnetic force and Joule heating are in the region between the corner electrodes and the conductivity element. The characteristics of current density distribution, magnetic induction intensity, electromag-netic force, Joule heating, velocity patterns and temperature profiles in the slag bath during ESR process with current-conductive mould were analyzed.

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