小方坯末端电磁搅拌位置的确定

›› 2016, Vol. 32 ›› Issue (3): 29-35.

小方坯末端电磁搅拌位置的确定

宋方圆¹,孙彦辉²,赵勇³,沈宏俊⁴,段大波¹

1. 北京科技大学冶金与生态学院
2. 北京科技大学
3. 北京科技大学钢铁共性技术协同创新中心
4. 北京科技大学冶金与生态工程学院

收稿日期:2015-10-19 修回日期:2015-12-30 接受日期:1900-01-01 出版日期:2016-06-05 发布日期:2016-06-15
通讯作者: 宋方圆 E-mail:1534299147@qq.com

Position determination of the final-electromagnetic stirring of continuous billets

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
2. University of Science and Technology Beijing
3. Collaborative Innovation Center of Steel Technology in University of Science and Technology Beijing
4. 1) School of Metallurgical and Ecological Engineering , University of Science and Technology Beijing

Received:2015-10-19 Revised:2015-12-30 Accepted:1900-01-01 Online:2016-06-05 Published:2016-06-15

摘要/Abstract

摘要： 为提高某钢厂72A钢小方坯质量，减轻中心偏析，建立了小方坯凝固传热数学模型，基于现场射钉试验和铸坯表面温度测量结果对模型进行了修正，并利用修正的模型对小方坯连铸过程凝固传热行为进行了数值模拟，确定了最合理的末端电磁搅拌安装位置。模拟结果表明：当拉速由1.60m/min增加到1.90m/min时，电磁搅拌安装位置由7.26~7.64m后移到8.95~9.41m；当浇铸温度由1 485℃升高到1 498℃时，电磁搅拌安装位置由7.95~8.35m后移到8.17~8.61m。考虑到浇铸温度波动对电磁搅拌安装位置的影响，确立1.75m/min拉速下最佳的安装位置为距弯月面8.17~8.35m处。工业试验表明，当拉速为1.75m/min，末端电搅中心位置在8.25m处时，中心缩孔和疏松均由1.0级下降到0.5级以下，中心碳偏析指数由1.15下降到1.05以下，铸坯质量得到了明显改善。

关键词: 小方坯, 数值模拟, 中心固相率, 末端电磁搅拌

Abstract: To improve the quality of continuous billets and reduce the central segregation of 72A tire cord steel, mathematical model of solidification and heat transfer was developed, then the model was revised based on the results of pin shooting tests and temperature measurements. By using the above revised model and numerical simulating, the appropriate position of final-electromagnetic stirring (F-EMS) was determined. The results showed that, the appropriate position of final-electromagnetic stirring (F-EMS) moved from 7.26—7.64 m back to 8.95—9.41m when the casting speed increased from 1.60 m/min to 1.90 m/min, it also moved from 7.95—8.35m back to 8.17—8.61m when the casting temperature increased from 1 485℃ to 1 498℃. Considering the influence of the temperature fluctuations, the optimal position of F-EMS was at distance from liquid meniscus 8.17—8.35m when the casting speed was 1.75m/min. The industrial tests showed that，when the casting speed was 1.75m/min, the center of F-EMS was at distance from liquid meniscus 8.25m, the center porosity grade and pipe grade both declined from 1.0 to less than 0.5, the center carbon segregation index also decreased from 1.15 to less than 1.05, the quality of continuous billets had improved.

Key words: billets, numerical simulation, center solid fraction, final-electromagnetic stirring

中图分类号:

TF777.2

宋方圆孙彦辉赵勇沈宏俊段大波. 小方坯末端电磁搅拌位置的确定[J]. , 2016, 32(3): 29-35.

[1]	蔡亦凡1，孙彦辉1，杨文中2，黎建全2，陈天明3，李志强3. 变径通道在八字型感应加热中间包中的应用[J]. 炼钢, 2020, 36(2): 42-47.
[2]	谢长川1, 李富帅1, 钱亮1, 邹旭1，郭春光2. 高拉速小方坯铸机关键技术的研发及应用[J]. 炼钢, 2020, 36(2): 59-62.
[3]	伍旋1,2，王明林2，张延玲1，张慧2，张开发2. 高拉速板坯结晶器流场影响因素的模拟研究[J]. 炼钢, 2020, 36(1): 27-33.
[4]	孙贞贞1,2，但斌斌1,2，牛清勇1,2，欧阳德刚3，容芷君1,2. KR法铁水脱硫搅拌流场的数值分析[J]. 炼钢, 2019, 35(6): 1-5.
[5]	宋景欣1，张发斌2. 基于热流密度分布模型的连铸倒角结晶器温度分布研究 [J]. 炼钢, 2019, 35(6): 35-40.
[6]	林大帅，李晓斐，张文涛，李艳峰，王景宁，刘剑锋. 轻压下对C610L连铸板坯内部品质的改善[J]. 炼钢, 2019, 35(5): 50-53.
[7]	张燕超1,2,张彩军1,2,王博1,2，周泉林2. 高马赫数氧枪枪位对100 t转炉自动炼钢熔池流速的影响[J]. 炼钢, 2019, 35(2): 1-10.
[8]	张燕超1,2，张彩军1,2,周泉林2. 高马赫数氧枪的数值模拟及优化实践[J]. 炼钢, 2018, 34(6): 1-6.
[9]	方瑞1,雷少武1,王建军2. 七流中间包的结构优化与数值模拟[J]. 炼钢, 2018, 34(6): 15-22.
[10]	李海英，刘东，张春奇. 蒸发冷却器内双流喷嘴雾化及蒸发特性数值模拟[J]. 炼钢, 2018, 34(6): 69-74.
[11]	汤磊, 张炯明, 翟明智. 连铸板坯轧制过程缩孔闭合行为的数值模拟[J]. 炼钢, 2018, 34(4): 59-65.
[12]	郭振和1，邓丽琴1，屈天鹏2. 吹氩钢包内气液两相流动及均混行为的数值模拟[J]. 炼钢, 2018, 34(3): 18-24.
[13]	王迎春1，柳向椿2. 改善高碳钢小方坯碳偏析工艺研究[J]. 炼钢, 2018, 34(2): 25-30.
[14]	周力，高书成，蒋栋初，马建超，徐昊. 小方坯连铸机末端电磁搅拌位置及连铸工艺优化实践[J]. 炼钢, 2018, 34(2): 38-43.
[15]	王德炯1，焦帅2，殷皓1，孙彦辉3，赵勇3，李晓滨4. GCr15钢大方坯传热凝固数值模拟[J]. 炼钢, 2018, 34(1): 30-35.