Austenite isochronal transformation kinetics of 1000 MPa cold rolled dual phase steel

ZHAO Xian-meng; KANG Yong-lin; HAN Qi-hang

doi:10.13374/j.issn1001-053x.2013.02.007

Volume 35 Issue 2

Jul. 2021

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ZHAO Xian-meng, KANG Yong-lin, HAN Qi-hang. Austenite isochronal transformation kinetics of 1000 MPa cold rolled dual phase steel[J]. Chinese Journal of Engineering, 2013, 35(2): 195-200. doi: 10.13374/j.issn1001-053x.2013.02.007

Citation:

ZHAO Xian-meng, KANG Yong-lin, HAN Qi-hang. Austenite isochronal transformation kinetics of 1000 MPa cold rolled dual phase steel[J]. Chinese Journal of Engineering, 2013, 35(2): 195-200. doi: 10.13374/j.issn1001-053x.2013.02.007

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Austenite isochronal transformation kinetics of 1000 MPa cold rolled dual phase steel

doi: 10.13374/j.issn1001-053x.2013.02.007

1. School of Materials Science and Engineering, University of Science and Technolog.v Beijing. Beijing 100083, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2011-12-20

Abstract

Abstract

The thermal expansion curves of 1000 MPa cold rolled dual phase steel during continuous heating were tested on a DIL805A dilatometer. The volume fraction of austenite in the steel was calculated by the lever rule method, and it is in good agreement with the result of quantitative metallography. The JMAK equation can predict the austenite isochronal transformation kinetics quite well. The influence of cold rolling reduction and heating rate on austenite isochronal transformation kinetics was also investigated. Finally, the equilibrium condition of phase interfaces during transformation was studied by thermodynamic calculation.
- dual phase steel,
- austenite,
- phase transitions,
- kinetics,
- cold rolling