Effect of partial solution treatment on martensitic transformation of 12%Cr steels

Toshihiro Tsuchiyma, Setsuo Takaki

Research output: Contribution to journalArticle

Abstract

When high chromium martensitic steels are subjected to partial solution treatment in (austenite +M23C6 carbide) two -phase region, not only the coarsening of austenite grains is effectively suppressed by insoluble-carbide particles, but also martensitic structure, which has formed during cooling, is refined through the treatment. In this study, the mechanism of refining of martensitic structure was discussed in Fe-12%Cr-C ternary alloys by investigating the relation between Ms temperature and solution treatment conditions, and the effect of insoluble-carbide particles on the substructures such as martensite-lath or -block. The Ms temperature of steels with full solution treatment simply depends on the content of C and Cr, but that of steels with partial solution treatment is dependent on the effective chemical composition of matrix, which is evaluated by taking the amount of C and Cr in insoluble-carbide away from their total content. Refining of martensite-block structure within grains is not caused directly by insoluble-carbide particles, but done indirectly through the refining of austenite grain size. While, on the martensite-lath structure, insoluble-carbide particles supply nucleation sites for laths, and work also as obstacles for growing laths. As a result, martensite-laths in steels with partial solution treament are divided finely by insoluble carbide particles, and the arrangement of laths is tend to be confused.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume82
Issue number12
Publication statusPublished - Dec 1 1996

Fingerprint

Steel
Martensitic transformations
martensitic transformation
carbides
Carbides
steels
martensite
Martensite
refining
austenite
Austenite
Refining
Martensitic steel
Ternary alloys
ternary alloys
Crystal microstructure
Coarsening
Chromium
substructures
chromium

All Science Journal Classification (ASJC) codes

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

Cite this

Effect of partial solution treatment on martensitic transformation of 12%Cr steels. / Tsuchiyma, Toshihiro; Takaki, Setsuo.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 82, No. 12, 01.12.1996, p. 71-76.

Research output: Contribution to journalArticle

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