Ultra-fine ferrite grains obtained in the TSDR process

Ling Zhang; Wangyue Yang; Chunxia Xue; Zuqing Sun

doi:10.1016/S1005-8850(08)60106-1

Volume 15 Issue 5

Oct. 2008

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文章导航 > 矿物冶金与材料学报（英文） > 2008 > 15(5): 568-573

Ling Zhang, Wangyue Yang, Chunxia Xue, and Zuqing Sun, Ultra-fine ferrite grains obtained in the TSDR process, J. Univ. Sci. Technol. Beijing, 15(2008), No. 5, pp. 568-573. https://doi.org/10.1016/S1005-8850(08)60106-1

Cite this article as:

Ling Zhang, Wangyue Yang, Chunxia Xue, and Zuqing Sun, Ultra-fine ferrite grains obtained in the TSDR process, J. Univ. Sci. Technol. Beijing, 15(2008), No. 5, pp. 568-573. https://doi.org/10.1016/S1005-8850(08)60106-1

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Materials

Ultra-fine ferrite grains obtained in the TSDR process

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

通讯作者:
Ling Zhang E-mail: asmlab@mater.ustb.edu.cn

中文摘要

By careful design of rolling schedule,ultra-fine (~2μm) ferrite grains in a low carbon high niobium (0.09wt%Nb) microalloying steel with average austenite grain sizes above 800 μm can be achieved in the simulated thin slab direct rolling process. The 5-pass deformation was divided into two stages: the refinement of austenite through complete recrystallization and the refinement of ferrite through dynamic strain-induced transformation. The effects of Nb in solution and strain-induced NbCN precipitates on the ferrite transformation were also extensively discussed.

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Materials

Ultra-fine ferrite grains obtained in the TSDR process

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Abstract

Abstract

By careful design of rolling schedule,ultra-fine (~2μm) ferrite grains in a low carbon high niobium (0.09wt%Nb) microalloying steel with average austenite grain sizes above 800 μm can be achieved in the simulated thin slab direct rolling process. The 5-pass deformation was divided into two stages: the refinement of austenite through complete recrystallization and the refinement of ferrite through dynamic strain-induced transformation. The effects of Nb in solution and strain-induced NbCN precipitates on the ferrite transformation were also extensively discussed.
- ultra-fine ferrite;
- niobium;
- precipitation;
- austenite;
- recrystallization;
- thin slab direct rolling