A Coupled Cellular Automaton-Finite Difference Model for Solidification Structure of High Carbon Steel in Bloom Continuous Casting
A coupled cellular automaton-finite difference (CA-FD) model has been developed to simulate solidification structure of high carbon steel in bloom continuous casting,with the consideration of the nucleation,dendrite growth,dendrite tip undercooling,solute diffusion and heat transfer during the solidification of continuous casting steel.The effect of fluid flow caused by the electromagnetic stirring in mold (M-EMS) on the heat transfer is taken into consideration by increasing the thermal conductivity,and also the effect of dendrite fragmentation due to the forced convection in mold induced by the inlet flow and the M-EMS on the nucleation is taken into account by increasing the grain nucleation density.In present paper,both the numerical method and the experimental method are used to reveal the solidification structure of high carbon steel in continuous casting.The comparison between simulated and experimental results shows that the simulated solidification structure agrees well with the experimental observed,which means that the developed CA-FD model can be used as an effective way to predict the solidification structure evolution of continuous casting steel.Meanwhile,the effects of the superheat and secondary cooling intensity on the solidification structure of high carbon steel are investigated by the developed CA-FD model,and it is found that increasing superheat and secondary cooling intensity can promote the columnar dendritic growth and restrain the equiaxed dendritic growth.
bloom continuous casting solidification structure cellular automaton finite difference columnar to equiaxed transition (CET)
Sen LUO Miaoyong ZHU Seppo LOUHENKILPI
School of Materials and Metallurgy,Northeastern University,Shenyang 110004,Liaoning,China School of Chemical Technology,Aalto University,P.O.Box 16200,FI-00076 Aalto,Finland
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-6
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）