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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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 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

+ Author Affiliations

Corresponding author:
Ling Zhang E-mail: asmlab@mater.ustb.edu.cn
Received: 26 October 2007

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