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首页> 外文期刊>Journal of Materials Research >Hot deformation behavior and microstructural evolution of Nb-V-Ti microalloyed ultra-high strength steel
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Hot deformation behavior and microstructural evolution of Nb-V-Ti microalloyed ultra-high strength steel

机译：Nb-V-Ti微合金超高强度钢的热变形行为和组织演变

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摘要

The hot deformation behavior of Nb-V-Ti microalloyed ultra-high strength steel was investigated by isothermal compression at 900-1200 ℃ with strain rates from 0.01 to 10 s_1. The microstructure evolution and precipitation behavior were studied using an optical microscope and a transmission electron microscope Results indicate that the peak stress of experimental steel increases with increasing the strain rate and decreasing the deformation temperature. The constitutive equation of hot deformation was developed with the activation energy Q being about 407.29 kJ/mol. The processing maps were also obtained to identify the instable regions of the flow behavior and to evaluate the efficiency of hot deformation. The size of dynamically recrystallized grains increases gradually with a decrease in the strain rate. Three types of carbides were identified, namely M3C, rich-Ti MC, and rich-Nb MC. With the increase of the deformation rate, the amounts of carbides increase, and the average sizes of the carbides decrease gradually.
机译：通过在900〜1200℃下等温压缩，应变率为0.01〜10 s_1，研究了Nb-V-Ti微合金超高强度钢的热变形行为。用光学显微镜和透射电子显微镜研究了组织的演变和析出行为。结果表明，实验钢的峰值应力随着应变率的增加和变形温度的降低而增加。建立了热变形本构方程，其活化能Q约为407.29 kJ / mol。还获得了加工图，以识别流动行为的不稳定区域并评估热变形的效率。动态再结晶晶粒的尺寸随着应变速率的降低而逐渐增加。确定了三种类型的碳化物，即M3C，富Ti MC和富Nb MC。随着变形率的增加，碳化物的数量增加，碳化物的平均尺寸逐渐减小。

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  • 来源
    《Journal of Materials Research》 |2017年第19期|3777-3787|共11页
  • 作者

    Ji Dong Chong Li; Chenxi Liu; Yuan Huang; Liming Yu; Huijun Li; Yongchang Liu;

  • 作者单位

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, People's Republic of China,Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of 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);
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