High-carbon steel plate with good surface quality and manufacturing method thereof

• Main Authors: PARK KYONG-SU, LEE JUNG-HYUNG, KIM DEUK JUNG
• Format: Patent
• Language: Chinese; English
• Published: 30.09.2022
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR 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; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A high-carbon steel sheet having good surface quality and a method for manufacturing the same are provided. The present invention provides a high carbonated washed steel sheet having good surface quality, the steel sheet comprising, by weight%: 0.4% or more and less than 1.2% of carbon (C), 0.5% or less (excluding 0%) of silicon (Si), 0.05% or less of phosphorus (P), 0.03% or less of sulfur (S), 0.1% to 2.5% of at least one of manganese (Mn) and chromium (Cr), and a remainder of iron (Fe) and unavoidable impurities, wherein the average thickness of the inner oxide layer and/or the decarburized layer formed in the surface layer portion of the steel sheet is 1 [mu] m to 10 [mu] m, and the standard deviation of the thickness of the inner oxide layer and/or the decarburized layer in the longitudinal direction of the steel sheet is 2 [mu] m or less. 提供了具有良好表面品质的高碳钢板及其制造方法。本发明提供了具有良好表面品质的高碳酸洗钢板，所述钢板按重量％计包含：0.4％或更多且少于1.2％的碳(C)、0.5％或更少(不包括0％)的硅(Si)、0.05％或更少的磷(P)、0.03％或更少的硫(S)、0.1％至2.5％的锰(Mn)和铬(Cr)中的至少一者、以及余量中的铁(Fe)和不