自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 1    February 2007

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Hot deformation behavior and flow stress model of F40MnV steel
WANG Jin(王 进), CHEN Jun(陈 军), ZHAO Zhen(赵 震), RUAN Xue-yu(阮雪榆)

National Die and Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China

Abstract:Single hit compression tests were performed at 1 223−1 473 K and strain rate of 0.1−10 s−1 to study hot deformation behavior and flow stress model of F40MnV steel. The dependence of the peak stress, initial stress, saturation stress, steady state stress and peak stain on Zener-Hollomon parameter were obtained. The mathematical models of dynamic recrystallization fraction and grain size were also obtained. Based on the tested data, the flow stress model of F40MnV steel was established in dynamic recovery region and dynamic recrystallization region, respectively. The results show that the activation energy for dynamic recrystallization is 278.6 kJ/mol by regression analysis. The flow stress model of F40MnV steel is proved to approximate the tested data and suitable for numerical simulation of hot forging.

 

Key words: microalloyed forging steel; flow stress; dynamic recovery; dynamic recrystallization; Zener-Hollomon parameter

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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