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Extremely low carbon steel continuous cast slab and extremely low carbon thin steel sheet having little surface bonding in steel sheet manufacturing process and method of manufacturing them
Extremely low carbon steel continuous cast slab and extremely low carbon thin steel sheet having little surface bonding in steel sheet manufacturing process and method of manufacturing them
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机译：钢板制造过程中表面结合少的极低碳钢连铸板坯和极低碳薄钢板及其制造方法
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摘要
(Objective) An IF continuous cast slab and a thin steel sheet which fundamentally solve defects such as surface defects, manufacturing difficulties and low strength of products, which are possessed by the IF-based thin steel sheet, and a method of manufacturing the same.;(Composition) Si 1.5%, Mn 2.0%, P 0.15%, Al = 0.01 to 0.15%, N 0.0050%, and the surface layer contains 0.01 to 0.08% of C present as a cementite, and the inner layer contains C 0.0050%, Ti = 0.02 to 0.10%, Nb = 0.01 to 0.10%, V = 0.02 to 0.10% and Zr = 0.03 to 0.10%, and the carbon is substantially composed of carbide And preferably the inner layer further contains B = 0.0001 to 0.0015% and the balance Fe and inevitably impurities, and a thin steel sheet and a continuous casting powder electronic brake made of the same, A slab obtained by combining an additive wire and a method for producing the thin steel sheet.;(Effect) It inhibits mass production, reduces production yield, and improves IF steel and its high strength steel, which are incomplete as product performance, as a solid base metal material.
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