| 摘要 |
A process for manufacturing a cast aluminum alloy plate, in which even in the twin-roll continuous casting process of an Al-Mg aluminum alloy being wide in solid-liquid coexisting temperature range, there can be attained inhibition of defects in the center region of plate thickness. In the process for manufacturing cast plate (4) of Al-Mg aluminum alloy containing a specified amount of Mg and having a large cast plate thickness according to twin-roll continuous casting technique, continuous casting is carried out while having a specified relationship satisfied by D (m) referring to the roll diameter of twin roll (1,2), v (m/s) referring to the circumferential velocity of the twin roll (1,2), s (m) referring to the solidification distance being the length of roll circumference from point (5,5) of starting of contact by molten metal (3) with the roll (1,2) to kiss point (6,6) and d (m) referring to the thickness of cast plate (4) as a roll gap at the kiss point (6,6).
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