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Investigation of recrystallization behavior of large sized Nb–V microalloyed steel rod during thermomechanical controlled processing

Published online by Cambridge University Press:  08 May 2017

Wenfei Shen ,
Chi Zhang ,
Liwen Zhang ,
Qianhong Xu ,
Yifeng Xu  and
Lifang Bie
Wenfei Shen
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China
Chi Zhang
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China
Liwen Zhang*
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China
Qianhong Xu
Affiliation:
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China
Yifeng Xu
Affiliation:
Suxin Special Steel Group Co., Ltd., Suzhou 215151, China
Lifang Bie
Affiliation:
Suxin Special Steel Group Co., Ltd., Suzhou 215151, China
*
a) Address all correspondence to this author. e-mail: commat@mail.dlut.edu.cn
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Abstract

To investigate the recrystallization behavior of large sized Nb–V microalloyed steel rods during thermomechanical controlled processing (TMCP), a series of isothermal hot compression tests were conducted on a Gleeble 1500 thermomechanical simulator. The kinetics and microstructure evolution models of dynamic recrystallization, static recrystallization, metadynamic recrystallization and the grain growth model of the tested steel were developed. Based on the developed models, a finite element (FE) model coupled with the recrystallization behavior of large sized Nb–V microalloyed steel rods during TMCP was established. Then, the distributions and evolutions of recrystallization fraction and grain size during the whole deformation process are obtained and analyzed. Finally, the predicted results were compared with experimental ones, and they show good agreement. This illustrates that the recrystallization models of the tested steel are valid and the developed FE model of large sized Nb–V microalloyed steel rods during TMCP is effective.

Keywords

recrystallization modelmicroalloyed steelthermomechanical controlled processingnumerical simulation
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 12 , 28 June 2017 , pp. 2389 - 2396
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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