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Strengthening mechanisms of Nb and V microalloying high strength hot-stamped steel

机译：高强度热冲压钢的Nb和V微合金的强化机理

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摘要

Effects of adding Nb and V components on the microstructure and mechanical properties of hot-stamped steel and corresponding strengthening mechanisms were investigated by both qualitative and quantitative methods, which include grain refining strengthening, dislocation strengthening, solid solution strengthening and precipitation strengthening. Results revealed that adding 0.046 wt% Nb to 30MnB5 steel can significantly improve the strength and hardness in comparison with other investigated steels with the same heat treatment processes. For the studied two steels adding both Nb and V, with the V content increases, the strength and hardness show a downward trend as dispersed nanometer precipitates, which play various strengthening roles, consume a part of carbon content and then reduce dislocation density. Our study shows that the major strengthening mechanism of the investigated four steels is the dislocation strengthening, which accounts for about 60% of total yield strength.
机译：通过定性和定量方法研究了Nb和V组分在热冲压钢和相应的强化机制的微观结构和力学性能的影响，包括晶粒精制强化，脱位强化，固溶强化和沉淀强化。结果表明，与具有相同热处理过程的其他研究钢相比，添加0.046wt％Nb至30mNB5钢可以显着提高强度和硬度。对于研究的两个钢加入Nb和V，随着V含量的增加，强度和硬度显示出分散的纳米沉淀的向下趋势，这起到了各种强化的作用，消耗了一部分碳含量，然后降低了脱位密度。我们的研究表明，调查的四个钢的主要加强机制是脱位加强，占总屈服强度的60％。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140115.1-140115.9|共9页
  • 作者

    Weijian Chen; Pengfei Gao; Shuai Wang; Xiaolong Zhao; Zhengzhi Zhao;

  • 作者单位

    Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China Beijing Laboratory for Modem Transportation Advanced Metal Materials and Processing Technology University of Science and Technology Beijing Beijing 100083 China;

    Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China Beijing Laboratory for Modem Transportation Advanced Metal Materials and Processing Technology University of Science and Technology Beijing Beijing 100083 China;

    Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China Beijing Laboratory for Modem Transportation Advanced Metal Materials and Processing Technology University of Science and Technology Beijing Beijing 100083 China;

    Carbon Steel and Thin Slab Factory of Hongxing Iron and Steel Co LTD Jiuquan Iron and Steel Group Jiayuguan 735100 China;

    Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing 100083 China Beijing Laboratory for Modem Transportation Advanced Metal Materials and Processing Technology University of Science and Technology Beijing Beijing 100083 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Strengthening mechanism; Hot-stamped steel; Martensite; Dislocation substructure;

    机译：加强机制;热冲压钢;马氏体;脱位子结构;

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