20CrMnTiH齿轮钢铸坯宏观碳偏析对轧材带状组织的影响

特殊钢 ›› 2012, Vol. 33 ›› Issue (5): 51-53.

20CrMnTiH齿轮钢铸坯宏观碳偏析对轧材带状组织的影响

刘建¹, 颜慧成², 唐薇¹, 朱文彬¹, 许伟阳², 唐广波²

1 湖南华菱湘潭钢铁有限公司，湘潭411101；
2 钢铁研究总院国家连铸技术工程研究中心，北京100081

收稿日期:2012-03-25 出版日期:2012-10-01 发布日期:2022-10-10
作者简介:刘建(1974-),男,工程师,2000年湘潭大学毕业,轧钢工艺和金属热处理研究。

Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH

Liu Jian¹ , Yan Huicheng², Tang Wei¹ , Zhu Wenbing¹ , Xu Weiyang² , Tang Guangbo²

1 Xiangtan Iron and Steel Co Ltd, Hunan Valin, Xiangtan 411101 ；
2 National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081

Received:2012-03-25 Published:2012-10-01 Online:2022-10-10

摘要/Abstract

摘要： 20CrMnTiH钢Φ130 mm圆钢的生产工艺流程为120 t BOF-LF-VD-300 mm×430 mm坯连铸-连轧。不同连铸工艺(过热度15～30℃,电磁搅拌0～400 A)生产的连铸坯和轧材的宏观碳偏析表明,较高的过热度和过强的结晶器电磁搅拌会加重20CrMnTiH钢连铸坯和轧材的宏观碳偏析;严重的宏观碳偏析,加剧晶枝偏析,提高钢的带状组织级别并提高退火钢材正偏析区的硬度值。

Abstract: Production flow sheet for Φ130 mm round bar of steel 20CrMnTiH is 120 t BOF-LF-VD-300 mm x430 mm bloom casting-continuous rolling. Carbon macro-segregation of rolled bar and casting bloom produced by different continuous casting process (liquid supper-heating extent 15 ~30℃ , electromagnetic stirring with 0-400 A) show that higher supper- heating extent and stronger mold electromagnetic stirring aggravate the carbon macro-segregation of bloom and rolled bar of steel 20CrMnTiH, and the serious carbon macro-segregation intensifies dendritic crystal segregation increases rating of banded structure of steel, and enhances hardness value of positive carbon segregation region of annealed steel products.

Key words: Gear Steel 20CrMnTiH, Carbon Macro-Segregation, Banded Structure, Hardness

刘建, 颜慧成, 唐薇, 朱文彬, 许伟阳, 唐广波. 20CrMnTiH齿轮钢铸坯宏观碳偏析对轧材带状组织的影响[J]. 特殊钢, 2012, 33(5): 51-53.

Liu Jian , Yan Huicheng, Tang Wei , Zhu Wenbing , Xu Weiyang, Tang Guangbo. Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH[J]. Special Steel, 2012, 33(5): 51-53.