This study focuses on the transient electroslag remelting process of 06Cr18Ni11Ti ingots with high filled ratio.By establishing a multiphysics and multiphase coupled model of the ESR process,the influence of melting rate on electro-magnetic,heat transfer,fluid flow,and solidification behaviors during the ESR process was investigated.The results indi-cate that under different melting rates,the current paths are generally consistent,with a obvious skin effect.The tempera-ture inside the crystallizer exhibits a parabolic distribution with significant temperature gradients.As the melting rate in-creased from 5 kg/min to 7 kg/min,the current density,Lorentz force,and Joule heating increased by 16.2%,37.7%,and 63.3%,respectively.The maximum temperature of the slag pool increased from 1 902 K to 2 058 K.Both the slag and molten pools exhibit pairs of oppositely directed vortices,with flow becoming more intense with the increasing of melt-ing rate.Under the conditions studied in this paper,increasing the melting rate leads to deepening of the molten pool and prolonging the local solidification time of the ingot.When the melting rate is 5 kg/min,the depth of the molten pool is be-tween 1/2 and 1/3 of the mold diameter and the local solidification time is shortest,which helps to ensure the good density and crystallization quality of the ingot.
关键词
电渣重熔/熔速/高填充比/06Cr18Ni11Ti钢/凝固过程
Key words
Electroslag Remelting/Melting Rate/High Filled Ratio/06Cr18Ni11Ti Steel/Solidification Process
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