小方坯连铸M-EMS频率对SWRH82B内部质量的影响研究
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- 英文论文题名：Investigation on the Effect of M-EMS Current Frequency on Internal Quality of SWRH82B Steel during CC Process
- 论文作者：刘珂 ; 丁宁 ; 孔祥涛 ; 周德 ; 江金东 ; 孙齐松 ; 李正松 ; 吕迺冰 ; 佟倩
- 英文论文作者：LIU Ke ; DING Ning ; KONG Xiangtao ; ZHOU De ; JIANG Jindong ; LV Naibing ; TONG Qian ; SUN Qisong ; LI Zhengsong ; Special Steel Dept. ; Shougang Research Institute of Technology ; Technology Center Dept. ; Shougang Shuicheng Iron&steel Group Co. ; Ltd
- 年：2016
- 作者机构：首钢技术研究院;首钢水城钢铁集团;
- 论文关键词：连铸 ; 小方坯 ; 结晶器电磁搅拌 ; SWRH82B ; 内部质量
- 英文论文关键词：continuous casting ; billet ; M-EMS ; SWRH82B ; internal quality
- 会议召开时间：2016-08-15
- 会议录名称：第三届全国电磁冶金与强磁场材料科学会议学术论文集
- 语种：中文
- 分类号：TF777.3
- 学会代码：ZGJS
- 会议名称：第三届全国电磁冶金与强磁场材料科学会议
- 会议地点：中国河南焦作
- 主办单位：中国金属学会电磁冶金与强磁场材料科学分会
- 学会名称：中国金属学会
- 页数：5
- 文件大小：1041k
- 原文格式：O
- 会议级别：全国
摘要
采用ROTLEC扭矩仪对结晶器电磁搅拌线圈安装位置扭矩进行了测量。测试结果表明:频率一定时,扭矩随着电磁搅拌电流的增大而增大;电磁搅拌电流一定时,结晶器内扭矩随着频率的增加先增加后减小。当电磁搅拌频率在3~4Hz时,扭矩最大。通过生产实践对比了不同电磁搅拌频率下铸坯内部质量。实验结果表明:与5Hz的电磁搅拌频率相比,当采用3~4Hz的搅拌频率时,铸坯组织致密度增加,中心缩孔及中心疏松分别由0.79、1.00降至0.72、0.89,中心碳偏析指数由1.07下降至1.06,中心偏析指数标准差由0.064下降至0.055。
Through application of torque meter supplied by Rotlec company,the relationship between M-EMS electromagnetic stirring torque in the mold and current intensity,current alternating frequency was determined.A maximum torque value exist at the current alternating frequency range of 3~4Hz upon given current intensity.Basing on the testing result,the internal quality of SWRH82 B steel at high casing speed under two different casting conditions,applying different current alternating frequency,was compared.The internal soundness or homogeneity was improved obviously.The average defect grade of center porosity decreased from 1.00 to 0.89 and that of center shrinkage cavity decreased from 0.79 to 0.72.Meanwhile,the average center segregation index decreased from 1.07 to1.06 and the standard deviation of center segregation index also decreased from 0.064 to 0.055.
Through application of torque meter supplied by Rotlec company,the relationship between M-EMS electromagnetic stirring torque in the mold and current intensity,current alternating frequency was determined.A maximum torque value exist at the current alternating frequency range of 3~4Hz upon given current intensity.Basing on the testing result,the internal quality of SWRH82 B steel at high casing speed under two different casting conditions,applying different current alternating frequency,was compared.The internal soundness or homogeneity was improved obviously.The average defect grade of center porosity decreased from 1.00 to 0.89 and that of center shrinkage cavity decreased from 0.79 to 0.72.Meanwhile,the average center segregation index decreased from 1.07 to1.06 and the standard deviation of center segregation index also decreased from 0.064 to 0.055.
引文
[1]王韬,陈伟庆,王宏斌.连铸参数和末端电磁搅拌对82B钢小方坯中心碳偏析的影响[J].特殊钢,2013,34(1):49-51.
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[4]李春龙,姜茂发,王宝峰.组合电磁搅拌对连铸大方坯内部质量的影响[J].东北大学学报,2003,24(7):677-680.
[5]A Mulcahy.Rotary.Electromagnetic Stirring for Billets and Blooms[J].Iron and Steel Engineer,1984,(6):49-57.
[6]L B Trindade,A C Vilela.Numerical model of electromagnetic stirring for continuous casting billets[J].IEEE Transactions on Magnetics,2002.38(6):3658-3660.
[7]工晓东,李廷举,金俊泽.时谐电磁场均衡性研究[J],大连工大学学报,2002,42(1):75—78.
[8]M Y Ha,H G Lee,S H Seong.Numerical simulation of three-dimensional flow,heat transfer and solidification of steel in continuous casting mold with the electromagnetic brake[J].Journal of Materials Processing Technology.2003,133.322—339.
[9]T T Nataraja,Nei-Kaddah.Finite element analysis of clcctromagnctically driven flow in sub-mold stirring of steel blooms and slabs[J].ISIJ International.1 998,38(7):680-689.
[10]K Fujisaki,T Ueyama.Magnctohy drodynamic calculation for electromagnetic stirring of molten metal[J].IEEE Transactions on Magnetics,1998,34(4):2120-2122.
[11]周亮,唐萍,李永祥.小方坯结晶器电磁搅拌磁场测试与分析[J].钢铁钒钛,2006,27(4),10-13
[2]K S OH,Y W Chang.Macro-segregation behavior in continuously cast high carbon steel blooms and billets at the final stage of solidification in combination stirring[J].ISIJ International,1995,35(7):866-875.
[3]L Beitelman of mold EMS design on the billet casting productivity and product quality[J].Canadian Metallurgical Quarterly,1999,38(5):301-309.
[4]李春龙,姜茂发,王宝峰.组合电磁搅拌对连铸大方坯内部质量的影响[J].东北大学学报,2003,24(7):677-680.
[5]A Mulcahy.Rotary.Electromagnetic Stirring for Billets and Blooms[J].Iron and Steel Engineer,1984,(6):49-57.
[6]L B Trindade,A C Vilela.Numerical model of electromagnetic stirring for continuous casting billets[J].IEEE Transactions on Magnetics,2002.38(6):3658-3660.
[7]工晓东,李廷举,金俊泽.时谐电磁场均衡性研究[J],大连工大学学报,2002,42(1):75—78.
[8]M Y Ha,H G Lee,S H Seong.Numerical simulation of three-dimensional flow,heat transfer and solidification of steel in continuous casting mold with the electromagnetic brake[J].Journal of Materials Processing Technology.2003,133.322—339.
[9]T T Nataraja,Nei-Kaddah.Finite element analysis of clcctromagnctically driven flow in sub-mold stirring of steel blooms and slabs[J].ISIJ International.1 998,38(7):680-689.
[10]K Fujisaki,T Ueyama.Magnctohy drodynamic calculation for electromagnetic stirring of molten metal[J].IEEE Transactions on Magnetics,1998,34(4):2120-2122.
[11]周亮,唐萍,李永祥.小方坯结晶器电磁搅拌磁场测试与分析[J].钢铁钒钛,2006,27(4),10-13