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首页> 外文期刊>ISIJ international >Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting
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Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting

机译：不稳定铸造轴承钢连续铸造叶片中夹杂物的空间成分分布的预测

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摘要

The transformation of non-metallic inclusions in the first continuous casting bloom of a bearing steel was studied through industrial trials and theoretical calculations. The spatial composition distribution of inclusions in the continuous casting bloom was predicted using a comprehensive model coupling heat transfer, thermodynamics, kinetics and industrial parameters. The effect of cooling rate on the transformation of composition of inclusions was investigated. The total oxygen in the first bloom gradually decreased from 12 ppm at the cast start to 7 ppm at 10 m cast length, and this variety in the total oxygen resulted in the decrease of the Al_2O_3 content in inclusions from 70% at the casting start to 50% at 10 m cast length. The transformation of inclusions during the continuous casting occurred preferentially at the quarter thickness of the bloom and the reaction zone gradually moved from the subsurface to the center of the bloom. Isothermal transformation diagrams and continuous cooling transformation diagrams of inclusions were established to characterize the transformation kinetics of inclusions. Inclusions at the subsurface of the CC bloom transformed at the mold cooling zone in the actual cooling of the continuous casting bloom, while inclusions at the center transformed at the air-cooling zone. The transformation ratio of inclusions in the CC bloom was determined by the cooling rate and the transformation rate was dominated by the temperature.
机译：通过工业试验和理论计算研究了轴承钢的第一连续铸造坯料中的非金属夹杂物的转化。使用综合模型耦合传热，热力学，动力学和工业参数，预测了连续铸造绽放中夹杂物的空间组成分布。研究了冷却率对夹杂物组成转化的影响。第一叶片中的总氧从铸造长度为7ppm的12ppm逐渐降低至7ppm，在总氧气中的这种变化导致铸造开始的70％的夹杂物中的含量减少。 50％在10米的铸造长度。在连续铸造期间的夹杂物的转化优先于盛开的季度厚度处发生，反应区逐渐从地下移动到绽放的中心。建立了等温转化图和连续冷却变换图，以表征包含的转化动力学。在连续铸造绽放的实际冷却的模具冷却区的CC盛开地下的夹杂物在模具冷却区域中变形，而在空气冷却区的中心变形的夹杂物。通过冷却速率测定CC绽放中的夹杂物的转化率，并通过温度支配转化率。

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  • 来源
    《ISIJ international》 |2021年第3期|824-833|共10页
  • 作者

    Jujin WANG; Lifeng ZHANG; Yuexin ZHANG; Gong CHENG; Yadong WANG; Ying REN; Wen YANG;

  • 作者单位

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) Beijing 100083 China;

    State Key Laboratory of Metastable Materials Science and Technology School of Mechanical Engineering Yanshan University (YSU) Qinhuangdao 066004 China;

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) Beijing 100083 China;

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) Beijing 100083 China;

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) Beijing 100083 China;

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) Beijing 100083 China;

    School of Metallurgical and Ecological Engineering at University of Science and Technology Beijing (USTB) 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    prediction; composition distribution; inclusions; bearing steel; continuous casting bloom; kinetics; thermodynamics; total oxygen;

    机译：预言;构成分布;夹杂物;轴承钢;连续铸造绽放;动力学;热力学;总氧气;

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