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首页> 外文期刊>Journal of Materials Research >Using differential scanning calorimetry to characterize the precipitation and dissolution of V(CN) and VC particles during continuous casting and reheating process
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Using differential scanning calorimetry to characterize the precipitation and dissolution of V(CN) and VC particles during continuous casting and reheating process

机译：使用差示扫描量热法表征连铸和再加热过程中V（CN）和VC颗粒的沉淀和溶解

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摘要

In this work, differential scanning calorimetry (DSC) was used to characterize and analyze the precipitation/dissolution kinetics of second phase particles during the cooling/reheating process in a vanadium microalloyed steel. The results indicated that three obvious exothermic peaks were detected on the cooling DSC curve. Furthermore, three corresponding endothermic peaks were also detected on the heating DSC curve. Combined with thermodynamic calculation and transmission electron microscopy analysis, these three exothermic peaks along cooling DSC curve were defined as the precipitation reaction of V(CN), the reaction of austenite transformation into ferrite and the precipitation reaction of VC, respectively. Meanwhile, three corresponding reverse reactions for cooling were also defined along the reheating DSC curve. The linear regression result revealed that the precipitation activation energies for V(CN) and VC were identified as 311.2 kJ/mol and 167.6 kJ/mol, respectively. The dissolution activation energies for VC and V(CN) were identified as 255.4 kJ/mol and 592.6 kJ/mol, respectively.
机译：在这项工作中，使用差示扫描量热法（DSC）表征和分析了钒微合金钢在冷却/再加热过程中第二相颗粒的析出/溶解动力学。结果表明，在冷却DSC曲线上检测到三个明显的放热峰。此外，在加热DSC曲线上还检测到三个相应的吸热峰。结合热力学计算和透射电镜分析，沿冷却DSC曲线的这三个放热峰分别定义为V（CN）的沉淀反应，奥氏体转变为铁素体的反应和VC的沉淀反应。同时，沿着再加热DSC曲线还定义了三个相应的冷却逆反应。线性回归结果表明，V（CN）和VC的沉淀活化能分别为311.2 kJ / mol和167.6 kJ / mol。 VC和V（CN）的溶解活化能分别确定为255.4 kJ / mol和592.6 kJ / mol。

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  • 来源
    《Journal of Materials Research》 |2018年第18期|2784-2795|共12页
  • 作者

    Long Mujun; Liu Tao; Chen Huabiao; Chen Dengfu; Duan Huamei; Fan Helin; Tan Kai; He Wenjie;

  • 作者单位

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Lab Met & Mat, Chongqing 400044, Peoples R China;

  • 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

    differential scanning calorimetry; second phase particles; precipitation kinetics; dissolution kinetics; activation energy;

    机译：差示扫描量热法;第二相颗粒;沉淀动力学;溶解动力学;活化能;

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