| 20CrMnTiH齿轮钢铸坯宏观碳偏析对轧材带状组织的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 刘建 颜慧成 唐薇 朱文彬 许伟阳 唐广波 |
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| 作者单位： | 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 |
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| 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。
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| 关 键 词： | 20CrMnTiH齿轮钢 宏观碳偏析 带状组织 硬度 |
| 收稿时间： | 2012-03-25 |
Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH |
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| Liu Jian
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Yan Huicheng
,
Tang Wei
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Zhu Wenbing
,
Xu Weiyang
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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. |
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| Authors: | Liu Jian Yan Huicheng Tang Wei Zhu Wenbing Xu Weiyang Tang Guangbo |
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| Affiliation: | 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 |
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| Abstract: | Production flow sheet forΦ130 mm round bar of steel 20CrMnTiH is 120 t BOF-LF-VD-300 mm×430 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 supperheating 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. |
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| Keywords: | Gear Steel 20CrMnTiH Carbon Macro-Segregation Banded Structure Hardness |
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