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Dependency of Microstructure and Inclusions on the Different Growth Rate for Directionally Solidified Non-quenched and Tempered Steel

  • Hui Liu
  • Jianbo Xie
  • Honggang Zhong
  • Qijie Zhai
  • Jianxun FuEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Using a Bridgman directional solidification furnace, the solidification experiments of a non-quenched and tempered steel were directionally conducted at a temperature ingredient with various growth rates (v = 10–300 μm/s). The values of the dendrite arm spacing and mean diameter of MnS (dMnS) inclusions in the steady uni-solidification zone were measured. Based on these results, dMnS is more directly related to the secondary dendrite arm spacing (λ2) than the primary one. Besides, the values of dMnS and λ2 decrease with increasing growth rate. The relationship between λ2 and dMnS with growth rate was determined by linear regression analysis. Therefore, λ2 = 472.06 v−0.375, dMnS = 4.45 v−0.125, and the linear fitting exponent values obtained in this work were nearly same with the previous data in similar systems.

Keywords

Directional solidification Dendrite MnS Growth rate 

Notes

Acknowledgements

This work is supported by National Key Research and Development Program of China (2018YFB0704400), and the National Natural Science Foundation of China (Grant numbers: 51671124, 51474142)

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Hui Liu
    • 1
  • Jianbo Xie
    • 1
  • Honggang Zhong
    • 1
    • 2
  • Qijie Zhai
    • 1
    • 2
  • Jianxun Fu
    • 1
    • 2
    Email author
  1. 1.School of Materials Science and EngineeringShanghai UniversityShanghaiPeople’s Republic of China
  2. 2.State Key Laboratory of Advanced Special SteelShanghai UniversityShanghaiPeople’s Republic of China

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