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A critical condition for the formation of a coarse columnar gamma grain structure in a peritectic solidified carbon steel

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Title: A critical condition for the formation of a coarse columnar gamma grain structure in a peritectic solidified carbon steel
Authors: Ohno, Munekazu Browse this author →KAKEN DB
Maruyama, Masato Browse this author
Matsuura, Kiyotaka Browse this author →KAKEN DB
Keywords: Casting
As-cast austenite grain
Solidification microstructure
Peritectic reaction
Issue Date: Nov-2013
Publisher: Pergamon-elsevier science ltd
Journal Title: Acta materialia
Volume: 61
Issue: 19
Start Page: 7334
End Page: 7341
Publisher DOI: 10.1016/j.actamat.2013.08.039
Abstract: The formation of a coarse columnar austenite grain (CCG) structure is a serious problem in continuous casting processes of peritectic solidified carbon steels. In this study, a guiding principle for the avoidance of CCG formation is developed. The critical condition for CCG formation recently put forward based on phase-field simulations, which is given by a balance between the cooling condition and the growth rate of the CCG, is first re-examined and modified by considering the effect of a liquid phase during the CCG formation. The validity of this critical condition is then investigated by three different casting experiments combined with heat conduction analyses. From a comparison between the cooling conditions and the resulting microstructural changes, the validity of the critical condition is successfully demonstrated. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/54711
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野 宗一

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