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Title: チタンの添加による炭素鋼の鋳造オーステナイト結晶粒の微細化
Other Titles: Refinement of As-cast Austenite Grain in Carbon Steel by Addition of Titanium
Authors: 佐々木, 優嘉1 Browse this author
松浦, 清隆2 Browse this author →KAKEN DB
大笹, 憲一3 Browse this author
大野, 宗一4 Browse this author →KAKEN DB
Authors(alt): Sasaki, Masayoshi1
Matsuura, Kiyotaka2
Ohsasa, Kenichi3
Ohno, Munekazu4
Keywords: carbon steel
austenite grain
grain refinement
titanium carbonitride
Issue Date: 25-Nov-2008
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 94
Issue: 11
Start Page: 491
End Page: 495
Publisher DOI: 10.2355/tetsutohagane.94.491
Abstract: Effects of Ti addition on as-cast austenite grain size in S45C carbon steel have been investigated in range of Ti addition between 0 and 0.5 mol%. The cooling rate was set to be 0.03°C/s. It is shown that the average austenite grain diameter decreases from 1900 to 250 μm as the Ti addition increases from 0 to 0.5 mol%. The microstructural observation revealed that the motion of austenite grain boundary is inhibited at inter-dendritic position, which is ascribable to pinning effect of Ti(C,N) particle. The CALPHAD analysis showed that this particle crystallizes mainly in L+γ−Fe+Ti(C,N) phase field. As increasing Ti addition, the size of Ti(C,N) particle does not substantially change, however, the number of the Ti(C,N) particles increases, leading to further refinement of the austenite grains.
Rights: 著作権は日本鉄鋼協会にある
Type: article
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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