Effect of electromagnetic stirring on the solidification structure of Q345D
YANG Hai-Feng1，WANG Yuan-yuan2，LI Ting-Gang1，LI Bin2，SUN Xiao-hui2，LIANG Xiao-Kai3，LEI Zuo-sheng2
（1. Minmetals YingKou Medium Plate Co.， Ltd.， Yingkou 115000， Liaoning， China 2. School of Material Scince and Engineering，Shanghai University， Shanghai 200444， Liaoning， China 3. Central Iron and Steel Research Institute Institute of Engineering Steel， Beijing 100081， China）
Abstract：Taking the Q345D steel produced in Minmetals YingKou Medium Plate Co.， Ltd.， as the research object， the effect of strand electromagnetic stirring （SEMS） on solidification structure of Q345D billets was simulated by the numerical simulation software ProCAST using the cellular automation-finite element （CAFE） model. Simulation results were evaluated by comparison between continuous casting billet with and with out strand electromagnetic stirring （SEMS）. It was proved that the simulation results were consistent with experiment results. The results indicate that increasing the electromagnetic stirring intensity can significantly increase the isometric crystal rate， and decrease the average grain size. When the electromagnetic stirring intensity increases from 0 A to 400 A at 6 Hz， the ratio of equiaxed grains increases significantly from 19.99% to 41.39%， the average grain radius decreases from 1.73×10－3 m to 1.68×10－3 m and the average grain size decreases from 8.21×10－6m2 to 6.99×10－6m2. The quality of continuous casting billet has been improved significantly under the effect of electromagnetic stirring.
Poole G M, Heyen M, Nastac L, et al. Numerical modeling of macrosegregation in binary alloys solidifying in the presence of electromagnetic stirring[J]. Metallurgical and Materials Transactions B, 2014, 45(5): 1834-1841.
[3]
Yao Q, Luo Z, Li Y, et al. Effect of electromagnetic stirring on the microstructures and mechanical properties of magnesium alloy resistance spot weld[J]. Materials & Design, 2014, 63: 200-207.
[4]
Willers B, Barna M, Reiter J, et al. Experimental Investigations of Rotary Electromagnetic Mould Stirring in Continuous Casting Using a Cold Liquid Metal Model[J]. ISIJ International, 2017, 57(3): 468-477.
KITTAKA S, FUKUOKAYA T, MARUKI Y, et al. Nippon Steel Strand Electro-Magnetic Stirrer “S-EMS” for Slab Caster[J]. Ratio, 2003, 10(20): 30.
[8]
Jing C, Wang X, Jiang M. Study on Solidification Structure of Wheel Steel Round Billet Using FE‐CA Coupling Model[J]. steel research international, 2011, 82(10): 1173-1179.
Gandin Ch A, Rappaz M. A coupled finite element-cellular automaton model for the prediction of dendritic grain structures in solidification processes[J]. Acta Metallurgica, 1994, 42(7): 2233?2239.
Rappaz M, Gandin Ch A. Probabilistic modelling of microstructure formation in solidification processes[J]. Acta Metallurgica et Materialia, 1993, 41(2): 345?351.
[14]
Kurz W, Giovanola B, Trivedi R.Theory of microstructural development during rapid solidification[J] .Acta Metall Mater , 1986 , 34(5):823-830 .
[15]
蔡开科. 连铸坯质量控制[M]. 冶金工业出版社，2010.
[16]
Agrawal S, Ghose A K, Chakrabarty I. Effect of rotary electromagnetic stirring during solidification of In-situ Al-TiB 2 composites[J]. Materials & Design, 2017, 113: 195-206.
[17]
Thomas B G, Najjar F M. Finite element modelling of turbulent fluid flow and heat transfer in continuous casting[J]. Applied Mathematical Modelling, 1991, 15(5): 226-243.
[18]
Mazumdar D. Mathematical modelling of transport phenomena in continuous casting of steel[J]. ISIJ international, 1994, 34(7): 584-592.
2018, Vol. 37 
