建立软接触电磁连铸过程电磁场计算模型,通过分别采用瞬态分析和谐波分析对高频正弦磁场计算结果的比较,验证高频磁场瞬态分析的准确性.利用瞬态分析方法,研究高频正弦激励电流密度在结晶器内钢液中产生的磁感应强度、感应电流及电磁力的变化规律.结果表明:钢液中磁感应强度和感应电流随激励电流密度的变化,其变化频率与激励电流密度的变化频唪相同,但由于结晶器壁有较强感应电流,钢液中磁感应强度和感应电流与激励电流密度的变化并非同步,说明电磁连铸结晶器内的高频磁场并非简谐波磁场;电磁力的变化频率是激励电流密度变化频率的两倍,激励电流密度达到正负幅值时,电磁力达到最大值,但当激励电流密度为零时,电磁力不为零,且部分电磁力会反向,严重时会导致液而波动,应加以控制.
参考文献
| [1] | VIVES C .Electromagnetic refining of aluminum alloys by the CREM process:Part Ⅰ.Working principle and metallurgical results[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1989,20(10):623-629. |
| [2] | H. NAKATA;T. INOUE;H. MORI .Improvement of Billet Surface Quality by Ultra-high-frequency Electromagnetic Casting[J].ISIJ International,2002(3):264-272. |
| [3] | 金百刚,王强,刘燕,崔大伟,吴成涛,王恩刚,赫冀成.软接触电磁连铸结晶器内磁场分布与弯月面行为[J].中国有色金属学报,2006(11):1931-1937. |
| [4] | Joonpyo PARK;Heetae JEONG;Hoyoung KIM .Laboratory Scale Continuous Casting of Steel Billet with High Frequency Magnetic Field[J].ISIJ International,2002(4):385-391. |
| [5] | 张林涛,邓安元,张兴武,王恩刚,赫冀成.矩形电磁软接触连铸结晶器内弯月面行为[J].中国有色金属学报,2006(08):1405-1410. |
| [6] | NA Xian-zhao,XUE Min,ZHANG Xing-zhong,GAN Yong.Numerical Simulation of Heat Transfer and Deformation of Initial Shell in Soft Contact Continuous Casting Mold Under High Frequency Electromagnetic Field[J].钢铁研究学报（英文版）,2007(06):14-21. |
| [7] | TANI M;SHIO K;WAJIMA K.The control of initial solidification by the imposition of pulsative AC electromagnetic field[A].Nagoya,ISIJ,2000:381-384. |
| [8] | LI T J;LI X T;ZHANG Z F;JIN J Z .Effect of multi-electromagnetic field on meniscus shape and quality of continuously cast metals[J].Ironmaking and Steelmaking,2006,33(01):57-60. |
| [9] | Zuosheng LEI;Zhongming REN;Kang DENG;Weixuan LI;Yunbo ZHONG .Amplitude-modulated Magnetic Field Coupled with Mold Oscillation in Electromagnetic Continuous Casting[J].ISIJ International,2006(5):680-686. |
| [10] | Tingju LI;Kensuke SASSA;Shigeo ASAI .Surface Quality Improvement of Continuously Cast Metals by Imposing Intermittent High Frequency Magnetic Field and Synchronizing the Field with Mold Oscillation[J].ISIJ International,1996(4):410-416. |
| [11] | 周月明,佐佐健介,浅井滋生.连铸过程中间歇式高频磁场代替结晶器机械振动的可行性实验研究[J].金属学报,2001(07):777-780. |
| [12] | Lei ZS;Ren ZM;Deng K;Li WX;Wang HM .Experimental study on mould oscillation-less continuous casting process under high frequency amplitude-modulated magnetic field[J].ISIJ International,2004(11):1842-1846. |
| [13] | 夏小江,王宏明,戴起勋,李桂荣,赵玉涛.电磁软接触连铸高频磁场的数值模拟[J].中国有色金属学报,2008(03):529-534. |
| [14] | 王宏明,任忠鸣,夏小江,戴起勋,李桂荣.电磁软接触结晶器内钢液面高度对磁场分布的影响[J].北京科技大学学报,2008(07):795-799,814. |
| [15] | SAEED M.Finite element analysis theory and application with ANSYS[M].Englewood Cliffs,New Jersey:Prentice-Hall,Inc,2005 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%