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Journal of Materials Science

, Volume 46, Issue 21, pp 6910–6915 | Cite as

The isochronal δ → γ transformation of high Cr ferritic heat-resistant steel during cooling

  • Qiuzhi Gao
  • Yongchang Liu
  • Xinjie DiEmail author
  • Zhizhong Dong
  • Zesheng Yan
Article

Abstract

Thermal simulation technology was employed to investigate phase transformation in heat-affected zones (HAZ) of high Cr ferritic heat-resistant steel. The simulated continuous cooling transformation diagram was established based on the experimental results obtained from different cooling rates in the range of 0.02–60 °C/s. A theoretical model considering the site saturation nucleation at grain boundaries has been applied to calculate the austenite fraction as a function of cooling rate. It is found that both the austenite fraction and grain size decrease with the increase of cooling rates. The calculated results are mostly consistent with the experimental data.

Keywords

Ferrite Austenite Cool Rate Duplex Stainless Steel Thermal Simulation 

Notes

Acknowledgements

The authors are grateful to the National Natural Science Foundation of China and Shanghai Baosteel Group Company (No. 50834011) for grant and financial support.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Qiuzhi Gao
    • 1
  • Yongchang Liu
    • 1
  • Xinjie Di
    • 1
    Email author
  • Zhizhong Dong
    • 1
  • Zesheng Yan
    • 1
  1. 1.School of Material Science and Engineering, Tianjin Key Laboratory of Advanced Jointing TechnologyTianjin UniversityTianjinPeople’s Republic of China

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