%0 Journal Article %A CHAI Yu-Ying %A DUAN Yi-Ru %A HUANG Xue-Chi %A LI Bao-Kuan %A LIU Zhong-Qiu %T Simulation of carbon segregation during electroslag remelting of H13 die steel %D 2022 %R 10.12034/j.issn.1009-606X.221357 %J The Chinese Journal of Process Engineering %P 1074-1084 %V 22 %N 8 %X Macrosegregation generally exists in the electroslag remelting (ESR) ingot, which seriously affects the homogeneity and quality of the ingot. A three-dimensional unsteady ESR mathematical model was established to study the macrosegregation phenomenon during ESR of large H13 die steel, and the interaction between alloying elements was considered. The anisotropic porous media model was used to simulate the momentum attenuation in the mushy zone. And solute redistribution behavior was calculated by the lever algorithm. The accuracy of the model was verified by experiments, and the distribution trend of carbon segregation index between simulation results and experimental results agree well. The simulation results showed that, at the beginning of melting, the metal pool was shallow and flat, and the metal rapidly solidified under the action of the cooling water in the bottom tank. With the progress of melting, the cooling effect of the bottom tank was weaker than the sidewall of the crystallizer, the metal pool profile deepened, and the carbon element was enriched at the bottom of the metal pool, and the concentration increased gradually. The bottom and edge of the ESR ingot showed negative segregation, while the center and top showed positive segregation. And the distribution of carbon segregation in ESR ingot did not change whether the initial element mass fraction and operating current were changed or not. When other initial elements were constant, the initial mass fraction of silicon increased from 0.8wt% to 1.2wt%, and the positive segregation index of carbon increased by 8.57%; The initial mass fraction of molybdenum increased from 1.1wt% to 1.75wt%, and the positive segregation index of carbon decreased by 1.89%. Under the condition of increasing the initial mass fraction of silicon and molybdenum, the distribution of carbon can be more uniform. When the working current decreased from 3700 A to 3100 A, the maximum positive segregation index of carbon decreased from 0.0856 to 0.0837, decreasing by 2.22%. %U https://www.jproeng.com/EN/10.12034/j.issn.1009-606X.221357