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半凝固遠心鋳造法により作製したAl-Cr-Cu合金管の組織と耐摩耗性

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Title: 半凝固遠心鋳造法により作製したAl-Cr-Cu合金管の組織と耐摩耗性
Other Titles: Structure and Wear Resistance of Al-Cr-Cu Alloy Pipes Produced by a Semi-Solid Centrifugal Casting Process
Authors: 大参, 達也1 Browse this author →KAKEN DB
室田, 康宏2 Browse this author
工藤, 昌行3 Browse this author
Authors(alt): Ohmi, Tatsuya1
Murota, Yasuhiro2
Kudoh, Masayuki3
Keywords: semi-solid processing
centrifugal casting
composite material
wear resistance
hardness
mixing
rapid solidification
aluminum alloy
intermetallic compound
structure control
solidification
Issue Date: 1-May-2002
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: 66
Issue: 5
Start Page: 537
End Page: 542
Publisher DOI: 10.2320/jinstmet1952.66.5_537
Abstract: The solidification structure, hardness and wear resistance of surface composite castings of an Al-Cr-Cu alloy produced by a two-step process of stir-mix-quenching and centrifugal casting have been investigated. In this process, two kinds of molten metals with different compositions are mixed with agitation in a mixing vessel to produce semi-solid slurry containing fine intermetallic crystals, and then the slurry is centrifugally cast. In the stir-mix-quenching experiments, a hypoeutectic Al-Cu alloy melt was used for “the first melt” which acts as a coolant, and a hyperperitectic Al-Cr alloy melt with a higher liquidus temperature was used for “the second melt,” which is rapidly quenched to precipitate numerous primary intermetallic crystals when it is brought into contact with the first melt. The structure, hardness and wear resistance of the specimen vary with the mass fraction of α-phase (aluminum solid solution) in the slurry. As the fraction of α-phase increases, the volume of macroscopic pores and hardness of the composite layer decrease. On the other hand, the composite layer has good wear resistance when the slurry with proper amount of α-phase was used. In such case, θ-phase (Al2Cu) acts as an bonding material for the primary intermetallic crystals to form rigid network of hard phases.
Relation: https://www.jstage.jst.go.jp/article/jinstmet1952/66/5/66_5_537/_article/-char/ja
Type: article
URI: http://hdl.handle.net/2115/74666
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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