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Effect of Si Addition on Oxidation Behavior of Nb Containing Ferritic Stainless Steel

机译：硅添加量对含铌铁素体不锈钢氧化行为的影响

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摘要

The effect of Si on the oxidation resistance of high purity Nb containing 19% Cr ferritic stainless steels has been investigated by means of isothermal heating at temperatures up to 1 273 K in air and, the structures of the scale and scale/metal interface were investigated with FE-SEM and FE-TEM. The results are as follows: Si improved the oxidation resistance, as reported in previous studies. The Si addition of about 0.1% improved the limit temperature of the oxidation resistance more than 100 K. The presence of an amorphous SiO_2 layer was found in the interface between the Cr_2O_3 scale and the metal. This layer might act as an oxidation resistance barrier. In the Si-free steel, a NbO_2 layer formed under the Cr_2O_3 scale, and the Fe_2Nb- free region formed beneath the surface. On the other hand, when Si was added, the formation of NbO_2 layer was suppressed. In case of 1%Si, no NbO_2 layer formed and the Fe_2Nb-free region was eliminated. In addition, Fe particles were present in the Cr_2O_3 scale in the Si-added steel.
机译：通过在空气中温度高达1 273 K的条件下等温加热研究了Si对含19％Cr铁素体不锈钢的高纯Nb的抗氧化性的影响，并研究了氧化皮和氧化皮/金属界面的结构使用FE-SEM和FE-TEM。结果如下：如先前研究中所报道的，Si改善了抗氧化性。添加约0.1％的Si可以将抗氧化极限温度提高到100 K以上。在Cr_2O_3氧化皮和金属之间的界面中发现了无定形SiO_2层的存在。该层可以用作抗氧化阻挡层。在无硅钢中，在Cr_2O_3氧化皮下形成NbO_2层，在表面下形成无Fe_2Nb区域。另一方面，当添加Si时，抑制了NbO_2层的形成。在1％Si的情况下，没有形成NbO_2层并且消除了无Fe_2Nb的区域。另外，在含硅钢中，Fe颗粒以Cr_2O_3的比例存在。

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  • 来源
    《ISIJ international》 |2018年第6期|1117-1125|共9页
  • 作者

    Yoshiharu INOUE; Nobuhiko HIRAIDE; Kohsaku USHIODA;

  • 作者单位

    Yawata R&D Lab., Nippon Steel & Sumitomo Metal Corporation, 1-1 Tobihata, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8501 Japan;

    R&D Center, Nippon Steel & Sumikin Stainless Steel Corporation, 3434 Shimata, Hikari-shi, Yamaguchi, 743-8550 Japan;

    Nippon Steel & Sumitomo Metal Corporation. Now at Nippon Steel & Sumikin Research Institute Corporation, Kokusai Bldg., 3-1-1 Marunouchi, Chiyoda-ku, Tokyo, 100-0005 Japan;

  • 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

    ferritic stainless steel; Niobium; Silicon; oxidation; air; scale; SEM; TEM; NbO_2;

    机译：铁素体不锈钢铌;硅;氧化空气;规模;扫描电镜TEM;NbO_2;

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