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首页> 外文期刊>ISIJ international >Effects of Nitrogen Gas Pressure on the Solidification Parameters and As-cast Microstructure Revolution during Pressurized Electroslag Remelting AISI 304 Stainless Steel
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Effects of Nitrogen Gas Pressure on the Solidification Parameters and As-cast Microstructure Revolution during Pressurized Electroslag Remelting AISI 304 Stainless Steel

机译：氮气压力对加压电渣重熔期间凝固参数和铸造微观结构旋转的影响AISI 304不锈钢

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摘要

Three AISI 304 stainless steel electrodes were remelted using the lab-scale pressurized electroslag remelting furnace under different nitrogen gas pressure conditions. The solidification parameters and microstructure evolution have been investigated with the sulfur print method method, color metallography and EPMA. The results showed that the pool depth, SDAS and mushy zone width firstly increased and then decreased with the increase of gas pressure from 0.1 to 1.2 MPa. With an approximately equal melting rate, the variation of solidification parameters is dependent on the competition between the heat transfer rate at the slag/pool interface and the ingot/mould interface, because increasing the nitrogen gas pressure could simultaneously increase the two heat transfer rates. Under the current pressure range, the solidification mode and microsegregation during solidification are not affected by the variation of gas pressure. In addition, the variation of nitrogen gas pressure could simultaneously change the nitrogen content and cooling rate in ingots. Both the nitrogen content and cooling rate could affect the content and composition of residual ferrite. However, under the current experiment conditions, the variation of nitrogen content plays a more important role in the content of residual ferrite than the cooling rate, because nitrogen is a strong austenite former element and the cooling rate has no wide variation.
机译：在不同的氮气压力条件下使用实验室压制的电解电渣重熔炉重新熔化三个AISI 304不锈钢电极。已经研究了硫印刷方法方法，颜色的金相和EPMA的凝固参数和微观结构演化。结果表明，池深度，SDA和糊状区宽度首先增加，然后随着气体压力的增加，0.1至1.2MPa的增加而降低。具有近似等熔融率，凝固参数的变化取决于炉渣/池界面和铸锭/模具界面之间的传热速率之间的竞争，因为增加氮气压力可以同时增加两个传热速率。在当前压力范围内，凝固过程中的凝固模式和微量测定不受气体压力变化的影响。另外，氮气压力的变化可以同时改变锭中的氮含量和冷却速率。氮含量和冷却速率均可能影响残留铁氧体的含量和组成。然而，在目前的实验条件下，氮含量的变化在残留铁氧体的含量中起比冷却速率的更重要作用，因为氮是强奥氏体以前元件，冷却速率没有宽的变化。

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  • 来源
    《ISIJ international》 |2020年第8期|1684-1692|共9页
  • 作者

    Jia YU; Fubin LIU; Zhouhua JIANG; Huabing LI; Congpeng KANG; Wenchao ZHANG; Ao WANG; Xin GENG;

  • 作者单位

    School of Metallurgy Northeastern University Shenyang 110819 China Hypervelocity Aerodynamics Institute China Aerodynamics Research & Development Center Mianyang 621000 China;

    School of Metallurgy Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 China;

    School of Metallurgy Northeastern University Shenyang 110819 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

    pressurized electroslag remelting; pressure; pool depth; cooling rate; microstructure; stain-less steel;

    机译：加压电袋重熔;压力;池深;冷却速度;微观结构;不锈钢;

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