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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
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)
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Submitter: 松浦 清隆
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