MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Refined Solidification Structure and Improved Formability of A356 Aluminum Alloy Plate Produced using a High-Speed Twin-Roll Strip Caster
Kenta SuzukiShinji KumaiYuichi SaitoAkikazu SatoToshio Haga
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2004 年 45 巻 2 号 p. 403-406

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An A356 aluminum alloy was cast into a 2 mm thick plate by a strip caster equipped with a pair of water-cooled rolls made of pure copper. The twin-roll cast plate exhibited fairly refined primary aluminum dendrite- and eutectic solidified structure. The estimated maximum cooling rate at the near-surface region of the plate is 4000 K/s. These values are significantly higher than the cooling rate for the permanent mold cast (2 K/s). The cast plate was cold-rolled and annealed into a 0.5 mm thick sheet. The resultant sheet was subjected to the 180° bending test. No cracking occurred in the twin-roll cast product. Improved formability is considered to be mainly due to the homogeneous distribution of fine Si particles.
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© 2004 The Japan Institute of Metals and Materials
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