Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (6): 461-467.DOI: 10.1016/S1006-7191(08)60124-6

• 研究论文 • 上一篇    下一篇

结晶器电磁搅拌对高碳钢坯宏观质量的影响

于海岐   

  1. 辽宁省沈阳市东北大学
  • 收稿日期:2009-03-03 修回日期:2009-08-31 出版日期:2009-12-25 发布日期:2009-12-16
  • 通讯作者: 于海岐
  • 基金资助:

    教育部新世纪优秀人才支持计划项目

Effect of electromagnetic stirring in mold on the macroscopic quality of high carbon steel billet

Haiqi YU, Miaoyong ZHU   

  1. School of Materials and Metallurgy,Northeastern University, Shenyang 110004, China
  • Received:2009-03-03 Revised:2009-08-31 Online:2009-12-25 Published:2009-12-16
  • Contact: Haiqi YU

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摘要：

采用工业试验的方法对圆坯连铸结晶器电磁搅拌过程的搅拌工艺参数进行了优化研究，分析了搅拌参数对高碳钢宏观质量的影响。试验结果表明，在现行的电磁搅拌器工作电流和频率条件下铸坯质量没有得到很好的控制，其中，1.0～2.0级的皮下裂纹达38.09%，1.0～1.5级的中心缩孔达14.28%，1.5级的中心疏松也达到14.29%。电流260 A和频率8 Hz 作为最终的优化参数方案对于改善铸坯的宏观质量有着显著的效果,其中,皮下裂纹,中心缩孔和皮下气泡等缺陷完全消除,且中心疏松和碳偏析也得到有效改善.

关键词: 圆坯连铸, 结晶器电磁搅拌, 宏观质量, 高碳钢

Abstract:

An industrial plant trial for optimizing the process parameters in a round billet continuous casting mold with electromagnetic stirring (M-EMS) was performed, in which the influences of stirring parameters with M-EMS on the solidification macrostructure of high carbon steel were investigated. The results show that the billet quality is not well controlled under the condition of working current and frequency with EMS, in which the subsurface crack of grade 1.0-2.0 ups to 38.09%, the central pipe of grade 1.0-1.5 reaches to 14.28%, and the central porosity of grade 1.5 is 14.29%. The parameters of current 260 A and frequency 8 Hz as the final optimum scheme has a remarkable effect for improving the macroscopic quality of billet, in which the subsurface crack, central pipe and skin blowhole are all disappeared, and the central porosity and carbon segregation are also well improved.

Key words: Round billet continuous casting, Electromagnetic stirring in mold, Macroscopic quality, High carbon steel