著者

工藤 淳平 西田 進一 福留 一樹 本村 貢

出版者

一般社団法人 日本機械学会

雑誌

機械材料・材料加工技術講演会講演論文集 2009.17 (ISSN:2424287X)

巻号頁・発行日

pp._503-1_-_503-2_, 2009-11-06 (Released:2017-06-19)

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This paper describes a new melt drag process for producing magnesium alloy strip with boss. This magnesium alloy part is made by model melt drag process. Model melt drag process replace solidification roll with flat substrate. The substrate has circular cylinder cavity and oval cavity. Molten magnesium alloy AZ31 feed into this cavity and form boss. The diameters of cylindrical geometry are φ5, 7.5 and 10mm. The measurement of oval cavity is width 5mm, length 30mm, depth 3mm. It was possible in the achievement of the filling of shape by keeping the melt temperature high, and the contact time between molten metal and substrate long. As result of microstructure observation, the cast defect such as shrinkage cavity did not exist, and fine and uniformly grain size (50〜70μm) confirmed.

著者

西田 進

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会誌 (ISSN:00214663)

巻号頁・発行日

vol.22, no.243, pp.200-207, 1974 (Released:2009-05-25)

参考文献数

4

被引用文献数

1 1

著者

村上 正志 西田 進也

出版者

The Society of Synthetic Organic Chemistry, Japan

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.41, no.1, pp.22-37, 1983-01-01 (Released:2010-04-23)

参考文献数

137

被引用文献数

11 12

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Chemical characteristics of cyclopropyl derivatives are classified and organic syntheses with practical utilization of these characteristics are reviewed. The classification involves : (1) additions of X-Y to a strained cyclopropyl sigma bond with ring cleavage; (2) additions of a nucleophile to activated cyclopropyl derivatives; (3) isomerizations of cyclopropyl cations, anions, and radicals to allylic species; (4) isomerizations of cyclopropylmethyl cations, anions, and radicals to either cyclobutyl or 3-butenyl species; (5) allenes from cyclopropylidenes and cyclopentadienes from 2-vinylcyclopropylidenes; (6) rearrangement of cyclopropylcarbenes to cyclobutenes; (7) reactions involving homolytic cleavage of a cyclopropane sigma bond; (8) vinylcyclopropane-cyclopentene rearrangement; (9) cis-1, 2-divinylcyclopropane-cyclohepta-1, 4-diene rearrangement and homo-1, 5-hydrogen migration; (10) homolyses of cyclopropene yielding vinylcarbenes ; (11) cycloadditions of some specifically activated olefins to cyclopropane derivatives; and (12) reactions of cyclopropene derivatives followed by ring cleavage of the resultant three-membered ring compounds.