고강도 냉연 강판, 고강도 용융 아연 도금 강판, 및 고강도 합금화 용융 아연 도금 강판

• Main Authors: KAWATA HIROYUKI, YOKOYAMA TAKAFUMI, OKAMOTO RIKI
• Format: Patent
• Language: Korean
• Published: 26.02.2018
• Subjects: 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; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

화학 조성이, 질량%로, C：0.050~0.40%, Si：0.01~3.0%, Mn：1.0~5.0%, sol.Al：0.001~1.0%, Ti：0.005~0.20%, B：0.0005~0.010%, P：0.1% 이하, S：0.01% 이하, O：0.1% 이하, N：0.01% 이하, Cr：0~1.0%, Mo：0~1.0%, Ni：0~1.0%, Cu：0~1.0%, Sn：0~0.50%, Nb：0~0.20%, V：0~0.50%, W：0~0.50%, Ca：0~0.01%, Mg：0~0.01%, Bi：0~0.01%, Sb：0~0.10%, Zr：0~0.01%, REM：0~0.01%, 잔부：Fe 및 불순물이며, [sol.Bs/B≤0.50] 및 [sol.Bq/B＞0.50](단, B：강 중의 B량, sol.Bs：표층부의 고용 B량, sol.Bq：내부의 고용 B량)을 만족하는, 고강도 냉연 강판. A high-strength cold-rolled steel sheet is provided that has a chemical composition that consists of, by mass%, C: 0.050 to 0.40%, Si: 0.01 to 3.0%, Mn: 1.0 to 5.0%, sol. Al: 0.001 to 1.0%, Ti: 0.005 to 0.20%, B: 0.0005 to 0.010%, P: 0.1% or less, S: 0.01% or less, O: 0.1% or less, N: 0.01% or less, Cr: 0 to 1.0%, Mo: 0 to 1.0%, Ni: 0 to 1.0%, Cu: 0 to 1.0%, Sn: 0 to 0.50%, Nb: 0 to 0.20%, V: 0 to 0.50%, W: 0 to 0.50%, Ca: 0 to 0.01%, Mg: 0 to 0.01%, Bi: 0 to 0.01%, Sb: 0 to 0.10%, Zr: 0 to 0.01%, and REM: 0 to 0.01%, with the balance being Fe and impurities, and that satisfies the formulas [sol. Bs/B ‰¤ 0.50] and [sol. Bq/B > 0.50] (where, B: B amount in the steel; sol. Bs: soluble B amount in a surface layer portion of the steel; and sol. Bq: soluble B amount in the steel interior).