| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous casting method of an Al alloy, with which the casting can stably be started at the time of continuously casting the Al alloy containing Ti in a specific thickness. SOLUTION: In a producing method for continuously casting an Al alloy sheet having <=3 mm thickness by supplying the molten Al alloy containing Ti into a gap between one pair of cooling rolls through a molten metal supplying nozzle and using a twin roll type continuous casting apparatus executing rolling while solidifying the molten Al alloy by the cooling rolls, the relation of a molten metal temp. just before the molten metal supplying nozzle at the time of starting the casting and the Ti content contained in the molten Al alloy is made in a range satisfying the followings. Formula I: Ti}>=2×10-6(T-700)2-3×10-4×(T-700)+0.015, Formula II: Ti}<=2×10-5(T-700)2-2.4×10-3(T-700)+0.1, Formula III: 700<=T<=790. Wherein, Ti} is Ti concn. (wt.%) contained in the molten Al and T is a molten metal temp. ( deg.C) just before the molten metal supplying nozzle.
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