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Metals and Materials

, Volume 6, Issue 4, pp 305–310 | Cite as

Precipitation behavior of MnS on oxide inclusions in Si/Mn deoxidized steel

  • Han S. Kim
  • Hae-Geon Lee
  • Kyung-Shik OH
Article

Abstract

The precipitation behavior of the MnS phase of MnO-SiO2 oxides in Si/Mn deoxidized steels was examined. MnS phase formation in the oxide phase was clearly identified, and the Mn content in both phases increased with isothermal holding at 1,200°C. With increased cooling rate, both the size of inclusions and the precipitation ratio of the MnS phase in the oxides decreased. More than 90% of MnO-SiO2 oxides contain MnS phases and MnS precipitation is accompanied by an Mn-depleted zone around the oxides. This zone was created not just around the MnS, but around the whole oxide inclusion. One can tentatively conclude that the majority of the MnS islands after isothermal holding are formed by the diffusion of Mn and S from the matrix into the inclusions.

Keywords

steel deoxidation inclusion oxides MnS precipitation steel chemistry 

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Copyright information

© Springer 2000

Authors and Affiliations

  • Han S. Kim
    • 1
  • Hae-Geon Lee
    • 1
  • Kyung-Shik OH
    • 2
  1. 1.Department of Materials Science and Metallurgical EngineeringPohang University of Science and TechnologyNam-kuKorea
  2. 2.Technical Research LaboratoriesPohang Iron & Steel Co. Ltd.Nam-kuKorea

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