KINETIC MODEL FOR PHASE TRANSFORMATIONS OF LOW CARBON STEELS DURING CONTINUOUS COOLING.

Masayoshi Suehiro, Takehide Senuma, Hiroshi Yada, Yoshikazu Matsumura, Toshihiko Ariyoshi

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

A calculation model for predicting the progress of transformations of low carbon steels during continuous cooling and the microstructure after cooling has been developed. The transformation from austenite to ferrite starts at the equilibrium temperature, Ae//3. The ferrite transformation follows the 'nucleation and growth' model at the early stage and the 'site saturation' model at the later stage. The carbon content of the untransformed austenite increases with the progress of ferrite transformation. The pearlite transformation starts when the carbon content of the austenite reaches the extrapolated Acm line in the equilibrium diagram. The bainite transformation starts when the temperature reaches the bainite start temperature, Bs, which is experimentally determined. Excellent agreement was obtained between the calculated and experimental results for the effect of composition (C, Mn, Si) on the transformation kinetics, continuous cooling transformation diagrams and microstructure after cooling.

Original languageEnglish
Pages (from-to)1026-1033
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume73
Issue number8
DOIs
Publication statusPublished - 1987

ASJC Scopus subject areas

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

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