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Title: 複合鋳込み遠心鋳造法による過包晶Al-Cr合金における初晶金属間化合物の微細化と偏在化
Other Titles: Refinement and Localization of Primary Intermetallic Compounds in Hyperperitectic Al-Cr Alloy by Centrifugal Duplex Casting
Authors: 大参, 達也1 Browse this author →KAKEN DB
木村, 欣晃2 Browse this author
伊藤, 洋一3 Browse this author
工藤, 昌行4 Browse this author
松浦, 清隆5 Browse this author →KAKEN DB
Authors(alt): Ohmi, Tatsuya1
Kimura, Yoshiaki2
Itoh, Youichi3
Kudoh, Masayuki4
Matsuura, Kiyotaka5
Keywords: composite material
intermetallic compound
hyperperitectic aluminum-chromium alloy
centrifugal casting
rapid solidification
structure control
Issue Date: May-1996
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 60
Issue: 5
Start Page: 490
End Page: 496
Publisher DOI: 10.2320/jinstmet1952.60.5_490
Abstract: A novel process named Centrifugal Duplex Casting has been proposed: it is a manufacturing process of aluminum cast pipes with in-situ composite layer which contains fine intermetallic compounds. In this process, two kinds of molten metals, i. e. molten aluminum (first melt) and molten Al-Cr alloy with higher liquidus temperature (second melt), are cast in sequence at a given interval in a rotating mold. The second melt collides with the meniscus of the spinning first melt, and is dispersed as fine fluid clumps. These fluid clumps are rapidly quenched, migrate toward the outer periphery, and accumulate to form the composite layer. The intermetallic compounds in this composite layer are much smaller in particle size than the Al-Cr alloy centrifugally cast by the conventional process. The solidification structure of the cast pipe produced by Centrifugal Duplex Casting is controlled by cooling capacity of the first melt. For instance, when the first melt has superheat at the time of the pouring of the second melt, coarse intermetallic particles grow inside of the refined composite layer. On the other hand, when the first melt has partially been solidified, the growth of the particles is suppressed. Therefore, the time interval from first to second pouring is an important parameter in this process.
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: 大参 達也

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