METHOD FOR MANUFACTURING HOT-ROLLED STEEL SHEET

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hot rolled steel sheet by which a surface shape can be made excellent by suppressing the occurrence of scale defects at the time of hot rolling. SOLUTION: A slab manufactured by continuous casting etc., is heated in a heating furnace and...

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Hauptverfasser:	KUBOYAMA EIICHI, HAYASHIDA TERUKI, ARISUMI SEIJI, KARASHIMA HIROSUKE, ABE HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for manufacturing a hot rolled steel sheet by which a surface shape can be made excellent by suppressing the occurrence of scale defects at the time of hot rolling. SOLUTION: A slab manufactured by continuous casting etc., is heated in a heating furnace and is subjected to rough rolling by a rougher 1, and thereafter, high pressure water 6 is injected from a nozzle 5 of a descaling apparatus to remove the scale formed on the surface. Thereafter, the steel sheet is immediately hot rolled by a finishing mill 3 equipped with rolling stands 2a to 2g. At this time, the nozzle 10 is arranged right behind the first stand 2a, and the water 11 is made to flow out of the nozzle under the conditions of water pressure