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Generation Mechanism of TiN Inclusion for GCr15SiMn during Electroslag Remelting Process

机译：电渣重熔过程中GCr15SiMn的TiN夹杂物生成机理

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摘要

TiN inclusion with large size found in ESR ingot is of great harm to steel GCr15SiMn, it is significant to elucidate the possibility of this inclusion in consumable electrode retaining in the subsequent ingot and the effect of slag composition on the content of TiN inclusion in ingot after ESR refining. Based on three remeltings and with the help of ultrahigh-temperature confocal scanning violet laser microscope, it demonstrates that TiN inclusion in electrode will completely decompose in the solid-liquid coexistence region at the electrode tip, reflecting that TiN inclusion found in ESR ingot is regenerated. For different contents of Ti in slag, there is a corresponding equilibrium value of Ti content in steel, when the content of Ti in electrode is higher than this critical equilibrium value, it will decline in steel, otherwise Ti pick-up will occur. The effect of increasing SiO_2 content in slag on decreasing Ti content in steel is obvious due to the Si/Ti exchange reaction taking place, further leading to the low content of TiN in ingot.
机译：在ESR铸锭中发现的大尺寸TiN夹杂物对钢GCr15SiMn的危害很大，这很重要地阐明了在后续的铸锭中将这种夹杂物保留在易损电极中的可能性以及炉渣成分对铸锭后TiN夹杂物含量的影响ESR提炼。基于三次重熔，并借助超高温共聚焦扫描紫激光显微镜，表明电极中的TiN夹杂物将在电极尖端的固液共存区域完全分解，反映出ESR铸锭中发现的TiN夹杂物得以再生。 。对于炉渣中不同含量的钛，钢中存在相应的钛含量平衡值，当电极中的钛含量高于该临界平衡值时，钢中钛含量会下降，否则会发生钛吸收。由于发生了Si / Ti交换反应，提高炉渣中SiO_2含量对降低Ti含量的影响是显而易见的，进一步导致铸锭中TiN含量低。

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  • 来源
    《ISIJ international》 |2015年第9期|1901-1905|共5页
  • 作者

    Liang YANG; Guo-guang CHENG; Shi-jian LI; Min ZHAO; Gui-ping FENG;

  • 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;

    Dongbei Special Steel Group, Fushun, 113001 China;

    Dongbei Special Steel Group, Fushun, 113001 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

    generation mechanism; TiN inclusion; GCr15SiMn; ESR process;

    机译：生成机制TiN夹杂物;GCr15SiMn;ESR流程;

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