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首页> 外文期刊>Materialwissenschaft und Werkstofftechnik >Effect of boron concentration on the solidification microstructure and properties of Fe-Cr-B alloy
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Effect of boron concentration on the solidification microstructure and properties of Fe-Cr-B alloy

机译：硼浓度对Fe-Cr-B合金凝固组织和性能的影响

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摘要

In this article, the effect of boron concentration (B = 0, 0.4, 0.8,1.4 and 2.0 respectively) on the solidification microstructure and properties of Fe-Cr-B alloy containing 0.35% C, 10-12% Cr, 0.5-0.8% Si, and 0.7-1.0% Mn was studied by means of the optical microscope (OM), the scanning electron microscope (SEM), X-ray diffraction (XRD), Rockwell hardness and Vickers hardness tester. The results indicate that the microstructure of boron-free sample consists of the martensite, and its hardness reaches 59.2 HRC. When a small amount of boron element was added, the eutectic phase of network structure generated along the grain boundary. The amount of eutectic phase increases when the boron concentration increases. Moreover, the eutectic phase is the mixture of boride and boron carbide. The boride is Fe_2B and the boron car bide is (Cr, Fe)_7(C, B)_3. Compared with boron-free sample, the Rockwell hardness of the samples with different boron concentrations are all higher, above 62 HRC, and the hardness grow up with the increase of boron concentration. When the boron concentration reaches to 1.4%, the Rockwell hardness of the alloy is 65.7 HRC, which is the highest in this study. When the boron concentration rises to 2.0%, the hardness has no obvious change.
机译：本文研究了硼浓度（分别为B = 0、0.4、0.8、1.4和2.0）对含0.35％C，10-12％Cr，0.5-0.8的Fe-Cr-B合金的凝固组织和性能的影响通过光学显微镜（OM），扫描电子显微镜（SEM），X射线衍射（XRD），洛氏硬度和维氏硬度计对％Si和0.7-1.0％Mn进行了研究。结果表明，无硼试样的显微组织为马氏体，硬度为59.2 HRC。添加少量硼元素时，沿晶界产生网络结构的共晶相。当硼浓度增加时，共晶相的量增加。此外，共晶相是硼化物和碳化硼的混合物。硼化物为Fe_2B，硼汽车净含量为（Cr，Fe）_7（C，B）_3。与无硼样品相比，不同硼浓度样品的洛氏硬度均更高，高于62 HRC，且硬度随硼浓度的增加而增大。当硼浓度达到1.4％时，合金的洛氏硬度为65.7 HRC，这是该研究中最高的。当硼浓度上升到2.0％时，硬度没有明显变化。

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  • 来源
    《Materialwissenschaft und Werkstofftechnik》 |2011年第8期|p.753-764|共12页
  • 作者

    H. Zhang; H. Fu; Y.Jiang; H. Cuo; Y. Lei; R. Zhou; Q. Cen;

  • 作者单位

    School of Materials Science and Engineering, Beijing University of Technology;

    Beijing, P.R. China;

    School of Materials Science and Engineering, Beijing University of Technology Beijing, P.R. China,School of Materials Science and Engineering, Beijing University of Technology, No. 100 of Pingle Garden, Chaoyang District, Beijing 100124, P. R. China;

    School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, P.R. China;

    Yunnan kun-Steel Heavy Equipment Manufacturing Croup Ltd., Kunming, Yunnan Province, P.R. China;

    School of Materials Science and Engineering, Beijing University of Technology;

    Beijing, P.R. China;

    School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, P.R. ChinaSchool of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, P.R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fe-cr-b alloy; boron concentration; solidification microstructure; eutectic phase; hardness;

    机译：Fe-Cr-B合金硼浓度凝固组织共晶相;硬度;

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