Phase equilibrium between CaO·Al 2O 3 saturated molten CaO-Al 2O 3-MnO and (Ca, Mn)S solid solution

Hiroshi Fukaya, Takahiro Miki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Refinement of austenite grains by generating intra granular ferrite (IGF) in austenite grains is one of the most effective methods for improving the toughness of the heat-affected zone (HAZ). It is known that MnS precipitated on fine oxides enhance formation of IGF in austenite grains. Flux composed of CaO -Al 2O 3 is often used in secondary refining and Ca-Mn-Al complex oxide may form, and it is important to clarify the mechanism of MnS precipitation on oxide inclusions. Therefore, molten CaO-MnO-Al 2O 3 oxide was equilibrated with (Ca, Mn)S solid solution in Al 2O 3 crucible in an electric resistance furnace at 1 648, 1 698 and 1 748 K in the present work. Phase relation between CaO·Al 2O 3 saturated molten CaO-MnO- Al 2O 3 oxide and (Ca, Mn)S solid solution was clarified.

Original languageEnglish
Pages (from-to)2007-2011
Number of pages5
JournalIsij International
Volume51
Issue number12
DOIs
Publication statusPublished - 2011 Dec 28

Keywords

  • Deoxidation
  • Desufurization
  • Inclusion
  • Oxysulfide
  • Phase diagram

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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