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首页> 外文期刊>ISIJ international >Interactive Relationship between the Superheat Interfacial Heat Transfer, Deposited Film and Microstructure in Strip Casting of Duplex Stainless Steel
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Interactive Relationship between the Superheat Interfacial Heat Transfer, Deposited Film and Microstructure in Strip Casting of Duplex Stainless Steel

机译：双相不锈钢条带铸造超热界面传热，沉积薄膜和微观结构之间的互动关系

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摘要

In this study, a new droplet solidification test has been developed to simulate the process of sub-rapid solidification of 2205 duplex stainless steel (DSS) strip casting process. The results suggest that the maximum heat flux and amount of heat removed increase with the repeat of dropping tests. Furthermore, the final wetting angle between the solidified droplet and substrate decreases, and the bottom area of the droplet increases with the successive addition of solidifying material on prior film. The major composition of the films is detected mainly as oxides containing O, Fe, Si, Mn, Cr and Cu, which precipitate from DSS samples and substrate. The microstructure of the sub-rapid solidified DSS samples consists of δ-ferrite (60-65%) and Widmanstaetten-like austenite (35-40%) phases. The element N mainly segregates in austen-ite phase and elements Si, Mo tend to stabilize ferrite phase. The finer microstructure in HS4 (the 12th droplet experiment with high superheat) sample implies that a higher interfacial heat flux (10.4360 MW m~(-2)) brings a higher cooling rate, and the nucleation rate can be increased markedly, causing a less space for each grain to grow and further refine the as-cast grain size.
机译：在该研究中，已经开发了一种新的液滴凝固试验来模拟2205双相不锈钢（DSS）条铸造工艺的副快速凝固过程。结果表明，随着滴定试验的重复，最大热通量和热量除外。此外，固化液滴和基板之间的最终润湿角度降低，并且液滴的底部面积随着先前膜上的连续添加凝固材料而增加。主要作为含有O，Fe，Si，Mn，Cr和Cu的氧化物来检测膜的主要组成，其从DSS样品和基材沉淀出来。副快速凝固的DSS样品的微观结构由δ-铁素体（60-65％）和Widmanstten样奥氏体（35-40％）相位组成。元素N主要在奥斯汀-ITE相和元素Si中偏离，Mo倾向于稳定铁氧体相。 HS4中的细胞微观结构（具有高过热的第12滴实验）意味着更高的界面热通量（10.4360mW m〜（-2））带来更高的冷却速率，并且核切割速率可以显着增加，导致较少每个谷物的空间生长，进一步完善铸粒尺寸。

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  • 来源
    《ISIJ international》 |2019年第5期|880-888|共9页
  • 作者

    Chenyang ZHU; Wanlin WANG; Jie ZENG; Cheng LU; Lejun ZHOU; Jiang CHANG;

  • 作者单位

    School of Metallurgy and Environment Central South University Changsha 410083 China National Center for International Research of Clean Metallurgy Central South University Changsha 410083 China;

    School of Metallurgy and Environment Central South University Changsha 410083 China National Center for International Research of Clean Metallurgy Central South University Changsha 410083 China;

    School of Metallurgy and Environment Central South University Changsha 410083 China National Center for International Research of Clean Metallurgy Central South University Changsha 410083 China;

    School of Metallurgy and Environment Central South University Changsha 410083 China National Center for International Research of Clean Metallurgy Central South University Changsha 410083 China;

    School of Metallurgy and Environment Central South University Changsha 410083 China National Center for International Research of Clean Metallurgy Central South University Changsha 410083 China;

    Aquion Energy LLC 32 39th Street Pittsburgh PA 15201 USA.;

  • 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

    interfacial heat transfer; deposited film; microstructure; strip casting; duplex stainless steel; droplet solidification test;

    机译：界面传热;沉积的薄膜;微观结构;条带铸造;双相不锈钢;液滴凝固试验;

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