Steel sheet with enhanced surface quality and method of manufacturing the same

PURPOSE: A steel sheet with excellent surface quality and a manufacturing method thereof are provided to ensure a time period and temperature enough to practice a descaling process six times in a rough rolling process by omitting a process using a sizing press process. CONSTITUTION: A manufacturing...

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Bibliographische Detailangaben
Hauptverfasser:	KIM, HYUNG SEOUNG, KIM, DONG YONG
Format:	Patent
Sprache:	eng ; kor
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:	PURPOSE: A steel sheet with excellent surface quality and a manufacturing method thereof are provided to ensure a time period and temperature enough to practice a descaling process six times in a rough rolling process by omitting a process using a sizing press process. CONSTITUTION: A manufacturing method of a steel sheet is as follows. Slab forming steel is re-heated(101). The re-heated slab is sent to a rough rolling process maintaining a temperature of 1000~1020°C. The slab is de-scaled 4~6 times and is rough rolled(103). The rough rolled material is finishing rolled and then is wound(105). The slab consists of C of 0.002~0.01 weight%, N of 0.002~0.01 weight%, S of 1.01wwight or less, Mn of 1.0weight% or less, Al of 0.01~0.06 weight%, Ti of 0.02~0.07 weight%, Nb of 0.01~0.05 weight%, Mb of 0.01~0.02 weight%, Cr of 0.01~0.05 weight%, Si of 0.01~0.05 weight%, and Fe.