PLATED STEEL PLATE AND MANUFACTURING METHOD THEREOF

Disclosed is a method for producing a coated steel sheet. A method for producing a coated steel sheet according to the present invention includes the steps of: reheating a steel slab containing 0.15-0.25 wt% of carbon (C), more than 0 wt% but not more than 1.5 wt% of silicon (Si), 1.5-2.5 wt% of man...

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Bibliographische Detailangaben
Hauptverfasser:	KWON, Sun Hwan, PARK, Jin Sung
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	Disclosed is a method for producing a coated steel sheet. A method for producing a coated steel sheet according to the present invention includes the steps of: reheating a steel slab containing 0.15-0.25 wt% of carbon (C), more than 0 wt% but not more than 1.5 wt% of silicon (Si), 1.5-2.5 wt% of manganese (Mn), more than 0 wt% but not more than 1.8 wt% of aluminum (Al), 0.3-1.0 wt% of chromium (Cr), more than 0 wt% but not more than 0.03 wt% of titanium (Ti), more than 0 wt% but not more than 0.03 wt% of niobium (Nb), and the balance of iron (Fe) and unavoidable impurities; hot-rolling, cooling and coiling the steel slab, thereby producing a hot-rolled steel sheet; pickling the hot-rolled steel sheet, followed by cold rolling; annealing the cold-rolled steel sheet at a temperature between 820°C and 870°C, followed by cooling at a finish-cooling temperature between 350°C and 450°C; tempering the cooled steel sheet at a temperature between 450°C and 550°C; and hot-dip galvanizing the tempered steel sheet.