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首页> 外文期刊>ISIJ international >Kinetic Analysis of Aluminum and Oxygen Variation of G20CrNi2Mo Bearing Steel during Industrial Electroslag Remelting Process
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Kinetic Analysis of Aluminum and Oxygen Variation of G20CrNi2Mo Bearing Steel during Industrial Electroslag Remelting Process

机译：G20CrNi2Mo轴承钢电渣重熔过程中铝和氧变化的动力学分析。

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摘要

Kinetics of slag-metal reactions was investigated in order to elucidate the mechanism of Al-oxidation and oxygen increase during industrial electroslag remelting (ESR) process. G20CrNi2Mo bearing steel was utilized as the consumable electrode and remelted using a 2 400-kg industrial ESR furnace. It was found that with the content of FeO in the slag increasing from 0.20 wt% to 0.45 wt%, the content of oxygen increased from 12 ppm in electrode to 16 ppm, 21 ppm in the ingot while Al decreased from 0.040 wt% in the electrode to 0.031 wt%, 0.019 wt% in the ingot. Based on penetration and film theories, a kinetic model has been developed. The model indicates that Al in the electrode is mainly oxidized by FeO at the metal film. Increase of soluble oxygen mainly occurs during the time of droplet formation and falling. The content of soluble oxygen occupies about fifty percent of the total oxygen. The rate-determining step of Al-oxidation is the mass transfer of Al at metal side, whereas oxygen increase lies in the mass transfer of FeO at slag side. With the content of FeO increasing from 0.20 wt% to 0.45 wt%, the mass transfer resistance of FeO decreases obviously, thus would result in an increase of Al-oxidation and total oxygen. In order to improve the cleanliness of refined ingot, it is more effective to decrease the oxygen potential of slag pool to a minimum level, or decrease the time of droplet formation and the temperature of slag pool to some extent, rather than improve the Al content in the electrode.
机译：研究了炉渣-金属反应的动力学，以阐明工业电炉渣重熔（ESR）过程中Al氧化和氧气增加的机理。使用G20CrNi2Mo轴承钢作为消耗电极，并使用2400 kg工业ESR炉进行重熔。结果发现，随着渣中FeO的含量从0.20 wt％增加到0.45 wt％，氧的含量从电极中的12 ppm上升到锭料中的16 ppm，铸锭中的21 ppm，而Al从焊剂中的0.040 wt％下降。电极为0.031 wt％，铸锭中为0.019 wt％。基于渗透和薄膜理论，开发了动力学模型。该模型表明，电极中的Al主要被金属膜上的FeO氧化。可溶性氧的增加主要发生在液滴形成和下落期间。可溶性氧的含量约占总氧的百分之五十。 Al-氧化的决定速度的步骤是Al在金属侧的传质，而氧的增加取决于FeO在炉渣侧的传质。随着FeO含量从0.20 wt％增加到0.45 wt％，FeO的传质阻力显着降低，从而导致Al氧化和总氧增加。为了提高精炼锭的清洁度，将熔渣池的氧势降低到最小水平，或在一定程度上减少熔滴形成时间和熔渣池温度，而不是提高铝含量，是更有效的方法。在电极上。

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  • 来源
    《ISIJ international》 |2017年第12期|2148-2156|共9页
  • 作者

    Shi-jian LI; Guo-guang CHENG; Zhi-qi MIAO; Lie CHEN; Cheng-wei LI; Xin-yan JIANG;

  • 作者单位

    State Key Lab. of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    State Key Lab. of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    State Key Lab. of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    Xining Special Steel Group, Co., Ltd, Xining, 810005 China;

    Xining Special Steel Group, Co., Ltd, Xining, 810005 China;

    Xining Special Steel Group, Co., Ltd, Xining, 810005 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

    bearing steel; ESR; slag-metal reaction; kinetic analysis; oxygen variation;

    机译：轴承钢;ESR;渣-金属反应动力学分析氧变化;

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