METHOD FOR PRODUCING Ti DEOXIDIZED STEEL CAST SLAB AND METHOD FOR PRODUCING Ti DEOXIDIZED THIN STEEL SHEET

PROBLEM TO BE SOLVED: To provide a method for producing a Ti deoxidized steel cast slab for a thin steel sheet that is difficult to cause a press crack due to a large inclusion while preventing a nozzle from clogging during continuous casting, and to provide a method for producing a thin steel sheet...

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Bibliographische Detailangaben
Hauptverfasser:	KIYOSE AKITO, UEDA TOSHIZUMI, HASEGAWA HAJIME, TAKAHASHI TAKAHARU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY METALLURGY OF IRON PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a Ti deoxidized steel cast slab for a thin steel sheet that is difficult to cause a press crack due to a large inclusion while preventing a nozzle from clogging during continuous casting, and to provide a method for producing a thin steel sheet.SOLUTION: In the method for producing a Ti deoxidized steel cast slab, when continuously casting a Ti deoxidized steel that includes, by mass, 0.005% or less C, 0.001% or more and 0.01% or less Al, 0.01% or more and 0.4% or less Ti, 0.0004% or less Ca (including 0% Ca), an immersion nozzle that has an interior body including 3% or more and 10% or less CaO is used. 【課題】連続鋳造時のノズル閉塞を防止した上で、大型介在物に起因するプレス割れが生じにくい薄鋼板用Ｔｉ脱酸鋼鋳片の製造方法、薄鋼板の製造方法を提供する。【解決手段】質量％で、Ｃ：０．００５％以下、Ａｌ：０．００１％以上０．０１％以下、Ｔｉ：０．０１％以上０．４％以下、Ｃａ：０．０００４％以下（Ｃａ：０％を含む）を含むＴｉ脱酸鋼の連続鋳造をする際に、ＣａＯ：３％以上１０％以下を含有する内装体を備えた浸漬ノズルを用いる。【選択図】図１