Prediction of nonmetallic inclusion formation in Fe-40mass%Ni-5mass%Cr alloy production process

Naoya Satoh, Toru Taniguchi, Setsuo Mishima, Oka Teruyasu, Takahiro Miki, Mitsutaka Hino

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Thermodynamic consideration is an effective procedure for calculation of inclusion composition prediction. In general, Henrian standard state is used, and the activity coefficients of the constituents are represented by Wagner's formalism in thermodynamic calculations. This formalism is commonly used in low alloy steel, and this is not recommended for high alloy steel. High alloy steel is detailed thermodynamically using the Raoultian standard state, and the activity coefficients of the constituents are converted by Miki and Hino's formalism in this study. The equilibrium relation between Al2O 3, MgO, spinel (MgO-Al2O3) and dissolved Al, Mg and O in Fe-40mass%Ni-5mass%Cr alloy (Spacer Frame for fluorescent display) were discussed. Plant data of Fe-40mass%Ni-5mass%Cr alloy were compared thermodynamically with the calculated results. It was found that Wagner's formalism can't be useful for inclusion composition prediction of Fe-40mass%Ni-5mass%Cr alloy, Miki and Hino's formalism should be utilized for high alloy steel.

Original languageEnglish
Pages (from-to)827-836
Number of pages10
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume95
Issue number12
DOIs
Publication statusPublished - 2009
Externally publishedYes

Keywords

  • Activity
  • Deoxidation
  • Henrian
  • Inclusion
  • Raoultian
  • Thermodynamic

ASJC Scopus subject areas

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

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