Method of producing thin cast sheet through continuous casting
AssigneeRheo-Technology, Ltd.
InventorsAkihiko Nanba, Chisato Yoshida, Takaharu Moriya, Naotsugu Yoshida, Yasuyuki Murata, Kazutoshi Hironaka, Mineo Muraki, Ujihiro Nishiike
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Abstract
Thin cast sheets having an excellent quality are obtained by continuous casting in which a semi-solidified metal slurry is fed from a continuous production device of the semi-solidified metal slurry through a discharge nozzle provided with means for heating the nozzle itself into a twin roll type continuous strip caster, at where the slurry is rapidly quenched and solidified to fine a structure and dispersion of precipitate.
Claims13
A method of producing thin cast sheets by continuous casting in a continuous production device which comprises:
- providing a molten metal;
- feeding said molten metal continuously into an upper port of said continuous production device, said continuous production device also having a bottom portion;
- agitating said molten metal in said continuous production device;
- cooling said molten metal during said agitating to form in said continuous production device a semi-solidified metal slurry having a solid fraction of 0.01-0.40, said semi-solidified metal slurry comprising a solid-liquid mixed phase in which fine non-dendritic primary solid particles are suspended;
- and
- feeding said semi-solidified metal slurry through a discharge nozzle arranged at said bottom portion of said continuous production device, said nozzle being heated through high frequency induction utilizing a frequency of 40-200 kHz so that not less than 80% of an induction current is applied to said nozzle;
- casting said semi-solidified metal slurry from said nozzle onto a twin roll type continuous strip caster wherein said slurry is rapidly quenched and cast to form a thin cast metal sheet having a fine structure and a dispersed precipitate therein.
Dependencies are inferred from the claim text.