Characterisation and modelling of microsegregation in low carbon continuously cast steel slab

Dayue Zhang, Martin Strangwood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Segregation during casting of microalloyed steels can affect subsequent processing and final properties. In optimising composition - processing combinations an accurate prediction of the composition and distribution of solute-rich and solute-depleted regions is needed. A series of low carbon (0.06-0.14 wt % C) ascast steel slabs have been investigated using statistically significant SEM-EDS mapping to characterise the compositions of solute-rich and solute-depleted regions as well as their size and spacing. A Clyne-Kurz model has been applied to these alloys (which all involve the peritectic formation of austenite during their solidification) using Thermo-Calc predictions of transformation temperatures and compositions. Initial modelling using carbon re-distribution predicted solute-rich fractions within 3 % of experimentally-determined values. Measured composition agreement with Clyne-Kurz and Thermo-Calc predictions was less good. The microalloying elements such as Nb seemed to have little effect on the prediction of solute-rich fractions. This paper will report the progress in modelling and characterisation of segregation in continuously cast steel slabs.

Original languageEnglish
Title of host publicationInternational Symposium on Liquid Metal Processing and Casting 2013, LMPC 2013
EditorsMatthew J.M. Krane, Joseph J. Beaman, Alain Jardy, Rodney L. Williamson, Joseph J. Beaman, Rodney L. Williamson
PublisherJohn Wiley & Sons
Pages321-327
Number of pages7
ISBN (Electronic)9781510814400
Publication statusPublished - 1 Jan 2013
Event10th International Symposium on Liquid Metal Processing and Casting, LMPC 2013 - Austin, United States
Duration: 22 Sep 201325 Sep 2013

Publication series

NameInternational Symposium on Liquid Metal Processing and Casting 2013, LMPC 2013

Conference

Conference10th International Symposium on Liquid Metal Processing and Casting, LMPC 2013
Country/TerritoryUnited States
CityAustin
Period22/09/1325/09/13

Keywords

  • Clyne-Kurz model
  • Microalloyed steel
  • Microsegregation

ASJC Scopus subject areas

  • Metals and Alloys

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