MS  >> Vol. 7 No. 4 (July 2017)

    电工硅钢连铸过程中非金属夹杂物行为研究
    Study on Non-Metallic Inclusion Behavior in Continuous Casting Process of Electrical Si-Steel

  • 全文下载: PDF(720KB) HTML   XML   PP.456-462   DOI: 10.12677/MS.2017.74060  
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作者:  

杨 敏:中国宝武钢铁集团有限公司,上海

关键词:
电工硅钢洁净度大颗粒非金属夹杂物连铸大样电解Electrical Si-Steel Cleanliness Large-Size Non-Metallic Inclusion Continuous Casting Bulk Sample Electrolysis

摘要:

本文以国内某钢厂电工硅钢为研究对象,通过工业试验及取样分析,研究了不同浇铸阶段电工硅钢中间包钢液和连铸坯中w(T.[O])和w([N])的变化以及大颗粒非金属夹杂物的含量、粒度、类型及来源。在本实验条件下得到以下结论:硅钢头坯中w(T.[O])、w([N])明显高于交接坯、正常坯和尾坯,不同浇铸阶段硅钢连铸坯中的w([N])均高于中间包钢液中的w([N]),连铸过程二次氧化严重;连铸坯中的大颗粒夹杂物主要源于渣金混卷和耐火材料的侵蚀,中间包和结晶器内流场的稳定性控制水平有待于提高。

In this paper, the continuous casting process of the non-oriented electrical Si-steel from a domestic steel company was taken as a research subject. Through sampling from tundish and continuous casting slab followed by oxygen and nitrogen analysis and bulk sample electrolysis, the content change of oxygen and nitrogen and the change of content, scale, type and source of large-size non-metallic inclusions was systematically studied. Under the experiment conditions of this paper, the main conclusions are as follows. The content of w(T.[O]) and w([N]) in the head slab and the molten steel of the corresponding tundish was significantly higher than the one in the other casting state. During different casting states, the content of [N] in the slab was lower than the molten steel of the corresponding tundish. The re-oxidation by air in the continuous casting process was serious. The large-size inclusions in the slab were formed by slag entrapment and refractory material erosion. The flow field of tundish and continuous casting mold should be further optimized.

文章引用:
杨敏. 电工硅钢连铸过程中非金属夹杂物行为研究[J]. 材料科学, 2017, 7(4): 456-462. https://doi.org/10.12677/MS.2017.74060

参考文献

[1] 何忠治. 电工钢[M]. 北京: 冶金工业出版社, 1996, 276.
[2] 吴开明. 无取向电工钢的生产工艺及发展[J]. 中国冶金, 2012, 22(1): 2-3.
[3] 吕学钧, 张峰. 夹杂物对无取向硅钢磁性的影响[J]. 特殊钢, 2012, 33(4): 22-25.
[4] 郭艳永, 蔡开科. 钙处理对冷轧无取向硅钢磁性的影响[J]. 北京科技大学学报, 2005, 27(4): 427.
[5] 张峰, 王波. 钙处理对无取向硅钢中非金属夹杂物的影响[J]. 特殊钢, 2011, 32(1): 44-47.
[6] Bóca, C.A. and Grofc, T. (1990) Analysis of Inclusions in Cold Rolled Non-Oriented Si-Fe Strips. Journal of Magnetic Materials, 83, 381.
[7] 李代锺. 钢中非金属夹杂物[M]. 北京: 科学出版社, 1983: 174-176.
[8] Huang, X.H. and Thomas, B.G. (1998) Modeling of Transient Flow Phenomena in Continuous Casting of Steel. Cana-dian Metallurgical Quarterly, 37, 197-212.
https://doi.org/10.1179/cmq.1998.37.3-4.197
[9] Wang, Y.F. and Zhang, L.F. (2010) Transient Fluid Flow Phenomena during Continuous Casting: Part I-Cast Start. ISIJ International, 50, 1777-1782.
https://doi.org/10.2355/isijinternational.50.1777
[10] Wang, Y.F. and Zhang, L.F. (2010) Transient Fluid Flow Phenomena during Continuous Casting: Part II-Cast Speed Change, Temperature Fluctuation, and Steel Grade Mixing. ISIJ International, 50, 1783-1791.
https://doi.org/10.2355/isijinternational.50.1783