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Microstructure and mechanical properties of a 2 wt% Nb bearing low carbon steel

机译：2wt％NB轴承低碳钢的组织和力学性能

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摘要

Design of advanced alloys with simple compositions is a new strategy to improve the recyclability of the alloys. In this study, a 2 wt% Nb bearing low carbon steel (2Nb steel) without addition of Ni, Cr and W was designed and processed by hot forging. The as-hot-forged steel shows a fine grain size microstructure with NbC precipitates formed. Microstructure and tensile properties were characterized at ambient and elevated temperatures. The yield stress and ultimate tensile stress of the as-forged 2Nb steel are 339 MPa and 498 MPa at room temperature, 297 MPa and 430 MPa at 600 °C, respectively. The good high temperature strength was related to the pinning effect of large NbC precipitates present at the grain boundaries and small precipitates formed in the grain interior that hinder the movement of grain boundaries and dislocations, respectively.
机译：具有简单组合物的先进合金的设计是一种提高合金可回收性的新策略。 在该研究中，通过热锻设计和加工2个WT％NB轴承低碳钢（2NB钢），无需添加Ni，Cr和W. 配热钢钢显示出具有NbC沉淀物的细粒尺寸微观结构。 在环境和升高的温度下表征了微观结构和拉伸性能。 锻造2NB钢的屈服应力和最终拉伸应力分别在室温下为339MPa和498MPa，分别在600℃下为297MPa和430MPa。 良好的高温强度与存在于晶界的大NbC沉淀物的钉扎效应有关，并且在谷物内部形成的小沉淀物分别妨碍晶界和脱位的运动。

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  • 来源
    《Materials Science and Engineering》 |2021年第5期|141957.1-141957.9|共9页
  • 作者

    Wentao Luo; Lingli Wang; Yuhui Wang; Li Meng; Yuan Yuan; Ling Zhang; Guilin Wu;

  • 作者单位

    International Joint Laboratory for Light Alloys (MOE) College of Materials Science and Engineering Chongqing University Chongqing 400044 PR China;

    International Joint Laboratory for Light Alloys (MOE) College of Materials Science and Engineering Chongqing University Chongqing 400044 PR China;

    National Engineering Research Center for Equipment and Technology of Cold Rolled Strip Yanshan University Qinhuangdao 066004 PR China;

    Metallurgical Technology Institute Central Iron and Steel Research Institute Beijing 100081 PR China;

    International Joint Laboratory for Light Alloys (MOE) College of Materials Science and Engineering Chongqing University Chongqing 400044 PR China;

    International Joint Laboratory for Light Alloys (MOE) College of Materials Science and Engineering Chongqing University Chongqing 400044 PR China Electron Microscopy Center of Chongqing University Chongqing University Chongqing 400044 PR China Shenyang National Laboratory for Materials Science Chongqing University Chongqing 400044 PR China;

    Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microstructure; Mechanical properties; Nb-bearing steel;

    机译：微观结构;机械性能;NB轴承钢;

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