Continuous Semi-Solid Casting Process for Aluminum Alloy Billets

Hakaru Nakato; Michio Oka; Seiji Itoyama; Masao Urata; Tatsuo Kawasaki; Ko-ichi Hashiguchi; Shinobu Okano

doi:10.2320/matertrans.43.24

Hakaru Nakato, Michio Oka, Seiji Itoyama, Masao Urata, Tatsuo Kawasaki, Ko-ichi Hashiguchi, Shinobu Okano

著者情報

キーワード: aluminium alloy, rheo-casting, semi-solid casting, continuous casting, thixoforming, round billet

ジャーナルフリー

2002 年 43 巻 1 号 p. 24-29

DOI https://doi.org/10.2320/matertrans.43.24

詳細

抄録

A new process for continuous semi-solid casting of billets of aluminum alloys was developed. Round aluminum alloy billets 75 mm and 150 mm in diameter are continuously cast in a semi-solid state by agitating the alloy in the agitating vessel with a mechanical screw and/or an electromagnetic stirrer. The solidification structure of the billets obtained by this process is a mixed structure of granular particles and a fine eutectic structure, except in a thin chill layer about 2 mm in thickness, which shows a dendrite structure. It was possible to use billets of AC4C alloy obtained by this process in the thixoforming process without surface conditioning.

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