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Effect of Cr Content and Microstructure on High Temperature Oxidation Behavior of High Nitrogen Heat-resistant Ferritic Steels

机译：Cr含量和组织对高氮耐热铁素体钢高温氧化行为的影响

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摘要

Effect of Cr content and microstructure on high temperature oxidation behavior of high nitrogen steels with 0.2-0.3 mass% of nitrogen has been investigated. For high temperature oxidation test 9-15%Cr high nitrogen steels are prepared. High temperature oxidation tests were carried out in air mainly at 800℃ for 300 h at maximum. Weight gain was measured and oxide scales were observed using an optical microscope and analyzed with an electron probe X-ray microanalyzer. The addition of high nitrogen improved the oxidation resistance of 9-15%Cr high nitrogen steels. It was found that the oxidation resistance of the high nitrogen steels does not depend greatly on Cr content but on their microstructure. The oxidation resistance of high nitrogen ferritic heat-resistant steels increased as the fraction of martensite structure increased. These results indicate for high nitrogen steels Cr diffusion along grain boundaries is further promoted resulting in the formation of protective oxide scale having high Cr concentration.
机译：研究了Cr含量和组织对氮含量为0.2-0.3％的高氮钢高温氧化行为的影响。为了进行高温氧化测试，制备了9-15％Cr的高氮钢。高温氧化试验主要在空气中进行，主要在800℃下进行最多300小时。测量重量增加并使用光学显微镜观察氧化皮并用电子探针X射线显微分析仪进行分析。高氮的添加改善了9-15％Cr高氮钢的抗氧化性。已经发现，高氮钢的抗氧化性在很大程度上不取决于Cr含量，而是取决于它们的显微组织。高氮铁素体耐热钢的抗氧化性随马氏体组织分数的增加而增加。这些结果表明，对于高氮钢，进一步促进了Cr沿晶界的扩散，从而形成了具有高Cr浓度的保护性氧化皮。

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  • 来源
    《ISIJ international》 |2018年第11期|2102-2109|共8页
  • 作者

    Shoichi MATSUBARA; Tomiko YAMAGUCHI; Fujimitsu MASUYAMA;

  • 作者单位

    Department of Materials Science and Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu, 804-8550 Japan;

    Department of Materials Science and Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu, 804-8550 Japan;

    Department of Materials Science and Engineering, Kyushu Institute of Technology, 1-1, Sensui-cho, Tobata-ku, Kitakyushu, 804-8550 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

    high temperature oxidation; nitrogen; heat-resistant steel; ferritic steel; high nitrogen steel; Cr; microstructure;

    机译：高温氧化;氮;耐热钢;铁素体钢高氮钢铬微观结构;

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