| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for stirringly and continuously casting an Al alloy, with which crystallized quantity of harmfulαintermetallic compound is restrained to the inevitable quantity and simultaneously, crystallized quantity of helpful fineβintermetallic compound can be enhanced to the upper limit value in a point of the improvement of mechanical characteristics of an Al alloy member. SOLUTION: At the time of the stirringly continuous casting method while stirring the molten metal (m) having Al alloy composition in a spout 15, the molten metal is introduced into a cylindrical mold 13 disposed just below the spout 15. As the molten metal (m) having the Al alloy compound, the metal containing 0.75 wt.% to <2 wt.% Fe, and at the time of being 0.75 wt.%<=Fe<=1.5 wt.%, Mn<=[(Fe/5)+0.2] wt.% and at the time of being 1.5 wt.%<Fe<2 wt.%, Mn<=[-Fe+2] wt.% as the Mn content, is used. Further, cooling rate CR of the molten metal (m) at the upper peripheral part (c) of molten metal stirring range forming part (b) above the inner peripheral surface (a) of the spout, is set to 10 deg.C/s<=CR<=30 deg.C/s.
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