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Numerical Simulation on Optimization of Center Segregation for 50CrMo Structural Alloy Steel

机译:50CrMo结构合金钢中心偏析优化的数值模拟

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摘要

To improve the center segregation of billet for 50CrMo structural alloy steel, a 3D numerical model of solidification and heat transfer process for continuous casting had been established. The influence law of continuous casting process parameters on the secondary dendrite arm spacing (SDAS) and equiaxed crystal ratio had been obtained. It was shown that reducing superheat and casting speed and increasing the secondary cooling intensity could decrease SDAS. Reducing any one of the three parameters could increase the equiaxed crystal ratio. Adjusting only secondary cooling intensity could not make the SDAS and equiaxed crystal ratio change in the desired direction, but regulating the other two parameters could supply this gap. After optimizing the continuous casting process parameters of 50CrMo billet, the defect of center segregation was solved basically.
机译:为了改善50CrMo结构合金钢的坯料中心偏析,建立了连续铸造凝固和传热过程的3D数值模型。得到了连铸工艺参数对二次枝晶臂间距(SDAS)和等轴晶比的影响规律。结果表明,降低过热度和铸造速度并增加二次冷却强度可以降低SDAS。降低三个参数中的任何一个都可以增加等轴晶比。仅调节二次冷却强度不能使SDAS和等轴晶比沿所需方向变化,但是调节其他两个参数可以弥补这一差距。通过优化50CrMo钢坯的连铸工艺参数,基本解决了中心偏析的缺陷。

著录项

  • 来源
    《High temperature materials and processes》 |2016年第6期|583-589|共7页
  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    billet; center segregation; secondary dendrite arm spacing; numerical simulation;

    机译:钢坯中心隔离;二次枝晶臂间距数值模拟;

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