Numerical Investigation of Electromagnetic Phenomena, Heat Transfer and Fluid Flow in Electroslag Remelting Process Including Conducting in the Mold
A transient three-dimensional finite volume mathematical model has been developed to investigate the coupled physical fields in the electroslag remelting (ESR) process.Through equations solved by the electrical potential method,the electric current,electromagnetic force (EMF) and Joule heating fields are demonstrated.The mold is assumed to be conductive rather than insulated.The volume of fluid approach is implemented for the two-phase flow.Moreover,the EMF and Joule heating,which are the source terms of the momentum and energy sources,are recalculated at each iteration as a function of the phase distribution.The solidification is modeled by an enthalpy-porosity formulation,in which the mushy zone is treated as a porous medium with porosity equal to the liquid fraction.The effect of the current on the ESR process is understood by the model.The electric current flows to the mold lateral wall especially in the slag layer.Joule heating and large EMF appears around the metal droplet,and the Joule effect and EMF changes as it falls.The EMF tends to block the movement of the metal droplet.The maximal temperature increases from 1951 to 2015K and the maximum metal pool depth increases from 34.0 to 59.5mm with the applied current ranging from 1000 to 2000A.
electroslag remelting heat transfer magnetohydrodynamic solidification
Qiang WANG Wenjie RONG Baokuan LI Fumitaka TSUKIHASHI
School of Materials and Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China Department of Advanced Materials Science,The University of Tokyo,5-1-5 Kashiwanoha,Chiba,277-8561,Ja
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
420-423
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）