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Effect of Ce Treatment on the Composition of Nucleation Inclusion in Ti–Mg Complex Deoxidized C–Mn Steel

  • Zhen Liu
  • Bo SongEmail author
  • Longfei Li
  • Zeyun Cai
  • Xiaokang Cui
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

FactSage software and SEM + EDS were introduced to determine the composition of nucleation inclusion in Ce-treated Ti–Mg deoxidized C–Mn steel with Ce content ranging from 0 to 0.036 wt%. The nucleation mechanism of inclusion in tested steels was investigated simultaneously. The experimental results showed that the composition of inclusion in the Ti–Mg complex deoxidized steel changed from MgO + MgAl2O4/MgTi2O4 + MnS to MgO + MgAl2O4/MgTi2O4 + CeAlO3/Ce2O2S + MnS after Ce treatment, while there was no significant change in the content of Ti(C, N). The mass fraction of Ce2O2S was markedly increased with the increase of Ce. The addition of Ce enhanced the probability of nucleation of acicular ferrite on inclusion. The nucleation mechanism of acicular ferrite induced by inclusion containing Ce was manganese-depleted zone (MDZ) based on the line scanning results and the low lattice mismatch between Ce2O2S and ɑ-Fe.

Keywords

Ce treatment Composition Nucleation inclusion Ti–Mg complex deoxidized 

Notes

Acknowledgements

The authors would like to gratefully acknowledge the financial support from the National Nature Science Foundation of China (No. 51774024).

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Zhen Liu
    • 1
  • Bo Song
    • 1
    Email author
  • Longfei Li
    • 1
  • Zeyun Cai
    • 1
  • Xiaokang Cui
    • 1
  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina

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