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Microstructural Features and Formation Processes of As-cast Austenite Grain Structures in Hypoperitectic Carbon Steels

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ISIJ Int. 55(11)_ 2374-2382 (2015).pdf1.15 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/75397

Title: Microstructural Features and Formation Processes of As-cast Austenite Grain Structures in Hypoperitectic Carbon Steels
Authors: Ohno, Munekazu Browse this author →KAKEN DB
Tsuchiya, Shingo Browse this author
Matsuura, Kiyotaka Browse this author →KAKEN DB
Keywords: austenite grain structure
hypoperitectic carbon steel
solidification
casting
grain growth
Issue Date: 15-Nov-2015
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 55
Issue: 11
Start Page: 2374
End Page: 2382
Publisher DOI: 10.2355/isijinternational.ISIJINT-2015-240
Abstract: Formation processes of as-cast austenite grain structures in hypoperitectic carbon steels have been investigated by means of a rapid directional solidification method, the cooling conditions of which are similar to those in the vicinity of slab surfaces in continuous casting processes. Coarse Columnar austenite Grain (CCG) structure was observed in all the hypoperitectic carbon steels employed in this study. It was demonstrated that its formation mechanism is ascribable to the discontinuous grain growth from Fine Columnar austenite Grain (FCG) formed in the delta phase, in which both the delta phase and residual liquid phase act as the pinning phase in the grain growth process. Then, a summary of the findings was provided regarding the microstructural features and the formation mechanisms of as-cast austenite grain structures formed in the rapid directional solidification in carbon steels with the carbon composition ranging from 0.05 to 0.45 mass%.
Rights: 著作権は日本鉄鋼協会にある
Type: article
URI: http://hdl.handle.net/2115/75397
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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