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過包晶炭素鋼の包晶変態とオーステナイト結晶粒形成

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Title: 過包晶炭素鋼の包晶変態とオーステナイト結晶粒形成
Other Titles: Peritectic Transformation and Austenite Grain Formation for Hyper-peritectic Carbon Steel
Authors: 丸山, 徹1 Browse this author
松浦, 清隆2 Browse this author →KAKEN DB
工藤, 昌行3 Browse this author
伊藤, 洋一4 Browse this author
Authors(alt): Maruyama, Tohru1
Matsuura, Kiyotaka2
Kudoh, Masayuki3
Itoh, Yohichi4
Keywords: dendrite arm spacing
directional solidification
grain growth
peritectic reaction
phase transformation
segregation
Issue Date: 1-Aug-1999
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 85
Issue: 8
Start Page: 585
End Page: 591
Publisher DOI: 10.2355/tetsutohagane1955.85.8_585
Abstract: Three binds of solidifying regions, (L+δ), (L+δ+γ) and (L+γ) have been observed in an unidirectional solidified hyper-peritectic steel sample quenched from a temperature above the solidus temperature. The primary δ phase in the (L+δ) region solidifies to a dendritic structure, and the fine columnar γ grains are exist in the boundary part of the (L+γ) region near to the (L+δ+γ). The columnar shape of the fine γ grains is caused by the shape of δ-dendrite. A transition from the fine γ grains to coarse columnar γ grains occurs in the (L+γ) region when a volume fraction of liquid lowers. The structure of coarse columnar γ grain have no relation with dendrite structure. The fine columnar γ grains disappear as a result of growth of coarse columnar γ grain. The measured temperature ranges for the (L+δ+γ) region agree with those calculated under a non-equilibrium condition. The end temperatures of peritectic reaction and solidification calculated are somewhat lower than the equilibrium temperatures, and are independent of solidification rate.
Rights: 著作権は日本鉄鋼協会にある
Type: article
URI: http://hdl.handle.net/2115/75752
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: 松浦 清隆

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