ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (2): 38-39.

• 工艺技术 • 上一篇    下一篇

连铸复合电磁搅拌对低碳钢碳偏析的影响

曹红福   

  1. 江阴兴澄特种钢铁有限公司,江阴214429
  • 收稿日期:2009-09-09 出版日期:2010-04-01 发布日期:2022-11-16
  • 作者简介:曹红福(1965-),男,高级工程师,1988年重庆大学毕业,汽车用钢的新产品研发。

Effect of Multiple Electromagnetic Stirring on Carbon Segregation in Concasting Low Carbon Steel

Cao Hongfu   

  1. Jiangyin Xingcheng Special Steel Co Ltd, Jiangyin 214429
  • Received:2009-09-09 Published:2010-04-01 Online:2022-11-16

摘要: 20CrMnTi钢(%:0.17~0.23C、0.80~1.10Mn、1.00~1.30Cr、0.04~0.10Ti)300 mm×340 mm铸坯结晶器-末端电磁搅拌(M-EMS,F-EMS)和3段复合电磁搅拌(M-EMS,S-EMS,F-EMS)对铸坯碳偏析影响的试验结果表明,当M-EMS和F-EMS电流分别从2 HZ/250 A和20 HZ/150 A降至2 HZ/100 A和20 HZ/100 A时,铸坯断面碳成分的极差由0.05%降至0.02%;当采用M-EMS为2 HZ/100 A,S-EMS为20 HZ/50 A,F-EMS为20 HZ/100A三段复合电磁搅拌时,铸坯断面碳成分的极差为0.02%,轧材中心疏松由原2段电磁搅拌的1.0~2.0级降至1.0~1.5级,方框形偏析2.0级出现率由9.7%降至0.8%。

关键词: 低碳钢, 连铸, 复合电磁搅拌, 碳偏析

Abstract: Commercial test for the effect of 300 mm x 340 mm bloom mold electromagnetic stirring-final electromagnetic stirring (M-EMS and F-EMS) and 3-section multiple EMS (M-EMS, S-EMS and F-EMS) on carbon segregation of bloom of steel 20CrMnTi (% : 0. 17 ~0. 23C, 0. 80 ~ 1. lOMn, 1. 00 ~ 1. 30Cr, 0.04 ~0. lOTi) has been carried out. Results show that as current intensity of M-EMS and F-EMS for 2-section stirring decreases respectively to 2 HZ/100 A and 20 HZ-100 A from original 2 HZ/250 A and 20 HZ/150 A, the max different of carbon content in steel at section of bloom decreases to 0. 02% from original 0. 05% ; and as using 3-section multiple EMS, i. e. current intensity- 2 HZ/100 A for M- EMS, 20 HZ/50 A for S-EMS and 20 HZ/100 A for F-EMS, the max different of carbon content in steel at section of bloom is 0. 02% , while the rating of centre porosity of rolled products decreases to 1. 0 ~ 1. 5 from original 1. 0 ~ 2. 0 as using 2- section EMS, and the occurred ratio of square segregation decreases to 0. 8% from 9. 7%.

Key words: Low Carbon Steel, Concasting, Multiple Electromagnetic Stirring, Carbon Segregation