Morphology control of MnS inclusions in steel during solidification by the addition of Ti and Al

Katsunari Oikawa, Shin Ichi Sumi, Kiyohito Ishida

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The morphology and distribution of MnS in Fe-0.1C-1Mn-0.02S by the addition of Ti and Al were investigated. The size of the globular monotectic MnS decreases with increasing Ti content, while the addition of Al increases the size of MnS. Moreover, the morphology of MnS changes from globular to rod-like forms with the addition of Al. The formation mechanism of MnS is discussed on the basis of phase diagram information. It is shown that the changes in morphology and size of MnS depend on the nature of the oxides in melts. As Al content is increased, deoxidation products tend to be Al2O3 having a high melting point, which act as nucleation sites for the rod-like eutectic MnS. As Ti content is increased, Ti-Mn complex oxide with a low melting point is formed, which finely disperses and acts as a nucleant for globular monotectic MnS.

Original languageEnglish
Pages (from-to)13-17
Number of pages5
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Volume90
Issue number1
Publication statusPublished - 1999 Dec 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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