采用数值模拟与现场实测相结合的方法,对大方坯结晶器电磁搅拌（M-EMS）过程进行了耦合数值模拟,研究了电磁搅拌参数及结晶器铜管厚度对钢液磁场和流场分布的影响。结果表明：当其他参数不变时,磁感应强度、电磁力和流速随着电流的增大而增加。磁感应强度随频率增加而减小,电磁力和流速随频率的增加而增大;且随着频率的增加,最大磁感应强度、电磁力和流速的变化值减小。对于连铸470mm×350mm大方坯,电磁搅拌电流和频率分别为550A和2Hz,结晶器铜板厚度为35mm时,能起到良好的电磁搅拌效果。
Combining with industrial experiment, a coupled numerical simulation of 470mm× 350mm bloom was conducted during continuous casting with mold electromagnetic stirring（M-EMS）. The influence of M-EMS current, frequency and mold thickness on distribution of magnetic field and flow field was investigated. The results show that magnetic flux density, electromagnetic force and velocity all increase with the coil current when keeping other pa- rameters unalterable. Magnetic flux density decreases with the increase of frequency, but electromagnetic force and velocity increase with the frequency. With the increase of frequency, the variation of maximum magnetic flux density, electromagnetic force and velocity decrease. For 470mm × 350mm bloom during continuous casting with M- EMS, the current, frequency and mold thickness of 550 A, 2 Hz and 35 mm can play well stirring effect.
参考文献
| [1] | Oh K S;Chang Y W .Maerosegregation Behavior in Continu- ously Cast High Carbon Steel Blooms and Billets at the Fina]Stage of Solidification in Combination Stirrlng[J].ISIJ International,2001,41(10):12Z9. |
| [2] | 钱刚,阮小江,蔡燮鳌.连铸轴承钢大方坯中心偏析的成因及对策[J].钢铁,2002(05):16-18. |
| [3] | 周得光;傅杰;王平 等.工艺参数对连铸轴承钢钢坯碳偏析的影响[J].钢铁,1999,34(06):22. |
| [4] | 叶婷,李德胜,肖爱平,张国权.350mm×470mm大方坯连铸轴承钢工艺及质量[J].连铸,2005(03):1-2. |
| [5] | 贺幼良.电磁离心凝固过程熔体流动和传热的有限元数值模拟[J].铸造,2000(08):473. |
| [6] | Soyeon Park;Misun Im;Seung-Hee Lee .Numerical Modeling of Steel Flow Pattern and Inclusion Flotation in Continuous Casting of Steel with EMLA[J].Journal of Korean Institute of Metal and Materials,2006(1):55-63. |
| [7] | Leonardo B. Trindade;Antonio C. F. Vilela;Aly F. F. Filho;Marco T. M. B. Vilhena;Rodrigo B. Soares .Numerical model of electromagnetic stirring for continuous casting billets[J].IEEE Transactions on Magnetics,2002(6):3658-3660. |
| [8] | 张桂芳,陈永.结晶器电磁搅拌电流对大方坯质量影响试验[J].铸造技术,2005(08):720-722. |
| [9] | 李建超,崔建忠,王宝峰,麻永林.大方坯连铸跨结晶器电磁搅拌的数值模拟[J].东北大学学报（自然科学版）,2006(05):497-500. |
| [10] | 陈永,杨素波.结晶器电磁搅拌器结构对大方坯内部质量的影响[J].钢铁钒钛,2007(03):42-46. |
| [11] | 任子平,姜茂发.大方坯结晶器内流场及自由液面的数值模拟[J].炼钢,2006(04):16-19. |
| [12] | 任兵芝,朱苗勇,王宏丹,陈永.大方坯连铸结晶器电磁搅拌三维电磁场与流场的数值模拟[J].金属学报,2008(04):507-512. |
| [13] | 陈家祥.连续铸钢手册[M].北京:冶金工业出版社,1995 |
| [14] | 于勇;仇圣桃;萧泽强.连续铸钢过程数学物理模拟[M].北京:冶金工业出版社,2001 |
| [15] | 陶文铨.数值传热学[M].西安:西安交通大学出版社,2001 |
| [16] | 舒震 .电磁搅拌连铸钢坯中的白亮带问题[J].钢铁,1982,17(09):56. |
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