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11. 发明授权

KR100722386B1 섀도우 마스크용 냉연 강판 및 그 제조 방법 失效
标题翻译：荫罩用冷轧钢板及其制造方法
公开(公告)号：KR100722386B1
公开(公告)日：2007-05-28
申请号：KR1020050130089
申请日：2005-12-26
申请人： 주식회사 포스코
发明人： 이수희 , 김교성 , 이규영
IPC分类号： C22C38/00 , C21D8/02

12. 发明公开

KR1020080060687A 성형성이 우수한 무방향성 고탄소 강판 및 그 제조 방법 有权
标题翻译：一种等效高碳钢板，其制造方法及其制造方法
公开(公告)号：KR1020080060687A
公开(公告)日：2008-07-02
申请号：KR1020060135081
申请日：2006-12-27
申请人： 주식회사 포스코
发明人： 신한철 , 박기철 , 김성진 , 이수희 , 정효태
IPC分类号： C22C38/00 , C21D8/12
CPC分类号： C22C38/18 , C21D8/1222 , C21D8/1233 , C22C38/02 , C22C38/04
摘要： A non-oriented high carbon steel sheet which is excellent in formability and has a small Rankford value difference by controlling texture is provided, and a manufacturing method of the non-oriented high carbon steel sheet is provided. A non-oriented high carbon steel sheet comprises, by weight percent, 0.2 to 0.5% of C, 0.1 to 1.2% of Mn, 0.4% or less of Si, and 0.5% or less of Cr with the balance of Fe and other inevitable impurities, wherein {111}texture of the steel sheet has a strength(f(g)) of at least 8. The texture has a Rankford value(r value) of 1.5 or more and a planar anisotropy(ÝÈr) of 0.3 or less. A manufacturing method of a non-oriented high carbon steel sheet comprises the steps of: manufacturing a steel slab comprising, by weight percent, 0.2 to 0.5% of C, 0.1 to 1.2% of Mn, 0.4% or less of Si, and 0.5% or less of Cr with the balance of Fe and other inevitable impurities; hot rolling the manufactured steel slab; pickling the hot rolled steel sheet without spheroidizing annealing to cold roll the pickled steel sheet a reduction ratio of at lest 70%; and subjecting the cold rolled steel sheet to crystallization annealing.
摘要翻译：提供了一种成形性优异且通过控制质地具有小Rankford值差异的非取向高碳钢板，提供了非取向高碳钢板的制造方法。非取向高碳钢板以重量％计含有C：0.2〜0.5％，Mn：0.1〜1.2％，Si：0.4％以下，Cr：0.5％以下，余量由Fe 杂质，钢板的{111}织构的强度（f（g））至少为8.织构的Rankford值（r值）为1.5以上，平面各向异性（ÝÈr）为0.3以下。无取向高碳钢板的制造方法包括以下工序：制造钢坯，其以重量％计含有C：0.2〜0.5％，Mn：0.1〜1.2％，Si：0.4％以下，0.5 Cr％以下，余量为Fe等不可避免的杂质; 热轧制造钢板; 对没有球化退火的热轧钢板进行酸洗，冷轧酸洗钢板的减速比至少为70％; 对冷轧钢板进行结晶退火。

13. 发明授权

KR100815709B1 내후성 및 가공성이 우수한 고강도 냉연강판과 그 제조방법 有权
标题翻译：具有优异耐候性的强力高强度冷轧钢板及其制造方法
公开(公告)号：KR100815709B1
公开(公告)日：2008-03-20
申请号：KR1020060126482
申请日：2006-12-12
申请人： 주식회사 포스코
发明人： 김재익 , 정기조 , 김종화 , 이수희
IPC分类号： C22C38/00 , C21D8/02
CPC分类号： C22C38/42 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/48 , C22C38/52 , C22C38/58 , C21D8/0226 , C21D8/0236 , C21D2211/005
摘要： A high strength cold-rolled steel sheet having weatherability, formability, and at least 80 kgf/mm^2 of tensile strength is provided, and a method for manufacturing the same is provided. A high strength cold-rolled steel sheet with excellent weatherability and formability has a composition comprising, by weight percent, 0.10 to 0.20% of carbon(C), 0.05 to 0.25% of silicon(Si), 1.0 to 2.5% of manganese(Mn), 0.02% or less of phosphorous(P), 0.01% or less of sulfur(S), 0.02 to 0.07% of aluminum(Al), 0.02 to 0.08% of niobium(Nb), 0.05 to 0.30% of nickel(Ni), 0.1 to 0.5% of copper(Cu), 0.8 to 1.5% of chromium(Cr), and 0.01 to 0.10% of cobalt(Co) with the balance of Fe and other inevitable impurities, and is comprised of 10 to 30% of a low temperature transformed structure, and the balance of ferrite. The low temperature transformed structure comprises at least one of martensite and bainite.
摘要翻译：提供具有耐候性，成形性和至少80kgf / mm 2的拉伸强度的高强度冷轧钢板，并提供其制造方法。具有优异的耐候性和成形性的高强度冷轧钢板具有以重量百分比计含有碳（C）0.10〜0.20％，硅（Si）0.05〜0.25％，锰（Mn）为1.0〜2.5％），0.02％以下的磷（P），0.01％以下的硫（S），0.02〜0.07％的铝（Al），0.02〜0.08％的铌（Nb），0.05〜0.30％的镍），铜（Cu）0.1〜0.5％，铬（Cr）0.8〜1.5％，钴（Co）0.01〜0.10％，余量由Fe和其他不可避免的杂质构成，为10〜30％的低温变形结构，以及铁素体的平衡。低温转化结构包括马氏体和贝氏体中的至少一种。

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