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1. 发明申请

WO2012081871A2 AUSTENITIC, LIGHTWEIGHT, HIGH-STRENGTH STEEL SHEET OF WHICH THE YIELD RATIO AND FLEXIBILITY ARE OUTSTANDING AND A PRODUCTION METHOD THEREFOR 审中-公开
标题翻译：奥氏体，轻质，高强度钢，其韧性和柔韧性优异，其生产方法
公开(公告)号：WO2012081871A2
公开(公告)日：2012-06-21
申请号：PCT/KR2011009537
申请日：2011-12-12
申请人： POSCO , CHIN KWANG-GEUN , HAN SANG-HO , KWAK JAI-HYUN
发明人： CHIN KWANG-GEUN , HAN SANG-HO , KWAK JAI-HYUN
IPC分类号： C22C38/00 , C21D8/02 , C22C38/04 , C22C38/58
CPC分类号： C22C38/58 , B21D17/04 , B32B15/01 , B32B15/012 , C21D8/02 , C21D8/0205 , C21D8/0247 , C21D8/0273 , C21D8/0284 , C21D2211/001 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/20 , C22C38/28 , C22C38/38 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C23C2/02 , C23C2/28 , C23C30/00 , Y10T428/12757 , Y10T428/12799
摘要： The present invention relates to an austenitic, lightweight, high-strength steel sheet of which the yield ratio and flexibility are outstanding and to a production method therefor, and more specifically relates to a high-strength steel sheet which can be used in making automobile inner panels or outer panels or else structural parts and to a production method therefor. Provided are: an austenitic, lightweight, high-strength, hot-rolling steel sheet, cold-rolling steel sheet and plated steel sheet of which the yield ratio and flexibility are outstanding, and which comprise, as percentages by weight, from 0.6 to 1.0% of carbon, from 0.1 to 2.5% of silicon, from 10 to 15% of manganese, no more than 0.02% of phosphorus, no more than 0.015% of silicon, from 5 to 8% of aluminium, from 0.01 to 0.20% of titanium, no more than 0.02% of nitrogen, and a balance of iron and unavoidable impurities, wherein the specific weight is no more than 7.4 g/cm3 and the manganese/aluminium ratio is between 2 and 3; and a production method therefor. According to one aspect, the present invention has a lower specific gravity and a higher yield ratio than high strength steels such as AHSS of the prior art and is outstandingly flexible such that it is effective in maintaining the rigidity of structural members and it is outstandingly suitable for press processing and thus it not only allows automobile parts to be made lighter in weight but also allows various parts to be integrated into a single part and hence has the advantage that processing can be simplified.
摘要翻译：本发明涉及屈服比和柔韧性突出的奥氏体，轻质，高强度钢板及其制造方法，更具体地说，涉及一种可用于制造汽车内胆的高强度钢板面板或外板或其结构部件及其制造方法。本发明提供了奥氏体，轻质，高强度，热轧钢板，冷轧钢板和屈服比和挠性突出的镀覆钢板，其重量百分比为0.6〜1.0 碳的百分比为0.1〜2.5％，锰为10〜15％，不超过0.02％的磷，不超过0.015％的硅，5〜8％的铝，0.01〜0.20％钛，不超过0.02％的氮，余量为铁和不可避免的杂质，其中比重不超过7.4g / cm 3，锰/铝比为2至3; 及其制造方法。一方面，本发明比现有技术的AHSS等高强度钢具有较低的比重和较高的屈服比，并且具有优异的柔性，使得它有效地保持结构构件的刚度，并且非常适合用于压制加工，因此它不仅允许汽车部件重量更轻，而且允许将各种部件集成到单个部件中，因此具有能够简化处理的优点。

2. 发明申请

WO2007064172A1 STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT HEAT TREATMENT AND IMPACT PROPERTY, HOT PRESS PARTS MADE OF IT AND THE METHOD FOR MANUFACTURING THEREOF 审中-公开
标题翻译：用于具有优良热处理和冲击性能的热压成型钢板，其热压件及其制造方法
公开(公告)号：WO2007064172A1
公开(公告)日：2007-06-07
申请号：PCT/KR2006/005155
申请日：2006-12-01
申请人： POSCO , OH, Jin-Keun , BAE, Dae-Chul , KIM, Seong-Ju , CHIN, Kwang-Geun , LEE, Jae-Ryung , PARK, Young-Jun
发明人： OH, Jin-Keun , BAE, Dae-Chul , KIM, Seong-Ju , CHIN, Kwang-Geun , LEE, Jae-Ryung , PARK, Young-Jun
IPC分类号： C22C38/04 , C22C38/00
CPC分类号： C22C38/02 , C22C38/001 , C22C38/04 , C22C38/06 , Y10T428/12 , Y10T428/12972
摘要： Disclosed is a steel sheet that exhibits an ultra-high strength after hot press forming followed by rapid cooling, and an enhanced yield strength after painting. The steel sheet has a composition comprising 0.1% to 0.5% by weight of C, 0.01% to 1.0% by weight of Si, 0.5% to 4.0% by weight of Mn, 0.1 % by weight or less of P, 0.03% by weight or less of S, 0.1 % by weight of soluble Al, 0.01% to 0.1% by weight of N, 0.3% by weight or less of W, and the balance Fe and other inevitable impurities. Further disclosed are a hot-pressed part made of the steel sheet and a method for manufacturing the hot-pressed part. The hot-pressed part achieves a high increment in yield strength after heat treatment for painting while ensuring an ultra-high tensile strength. Furthermore, the hot-pressed part exhibits superior adhesion to a coatinglayer, good surface appearance and improved corrosion resistance after painting.
摘要翻译：公开了一种在热压成型后快速冷却时具有超高强度的钢板，涂装后的屈服强度提高。该钢板具有0.1〜0.5重量％的C，0.01〜1.0重量％的Si，0.5〜4.0重量％的Mn，0.1重量％以下的P，0.03重量％或更少的S，0.1重量％的可溶性Al，0.01〜0.1重量％的N，0.3重量％以下的W，余量为Fe等不可避免的杂质。进一步公开了由钢板制成的热压部件和制造热压部件的方法。热压部件在确保超高抗拉强度的同时，在涂装热处理后的屈服强度增加很大。此外，热压部件对涂布层具有优异的粘附性，良好的表面外观和改善的涂漆后的耐腐蚀性。

3. 发明申请

WO2007024114A1 STEEL SHEET FOR GALVANIZING WITH EXCELLENT WORKABILITY, AND METHOD FOR MANUFACTURING THE SAME 审中-公开
标题翻译：用于具有优异的可加工性的钢化钢板及其制造方法
公开(公告)号：WO2007024114A1
公开(公告)日：2007-03-01
申请号：PCT/KR2006/003348
申请日：2006-08-24
申请人： POSCO , SOHN, Il-Ryoung , CHIN, Kwang-Geun , KANG, Hee-Jae , KIM, Sung-Il
发明人： SOHN, Il-Ryoung , CHIN, Kwang-Geun , KANG, Hee-Jae , KIM, Sung-Il
IPC分类号： C22C38/00
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/0426 , C21D8/0473 , C21D9/46 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/60 , C23C2/02
摘要： A high strength ductile steel sheet for extra deep drawing mainly used for interior or exterior plates of automobile bodies, and a method for manufacturing the same are disclosed. The steel sheet comprises, by weight%, C: 0.010% or less, Si: 0.1%or less, Mn: 0.06 ~ 1.5%, P: 0.15% or less, S: 0.020%or less, Sol. Al: 0.10 ~ 0.40%, N: 0.010% or less, Ti: 0.003 ~ 0.010%, Nb: 0.003 ~ 0.040%, B: 0.0002 ~ 0.0020%, Mo: 0.05% or less, one or both of Sb: 0.005 ~ 0.05% and Sn: 0.005 ~ 0.05%, a total amount of Sb and Sn being in the range of 0.005 ~ 0.1% when both of Sb and Sn are added to the steel sheet, and the balance of Fe and other unavoidable impurities. The steel sheet has surface agglomerates having an average diameter of 1 D or less, and a tensile strength of 28 - 50 Df/D.
摘要翻译：公开了一种主要用于汽车车体的内外板的用于额外深冲的高强度延性钢板及其制造方法。钢板以C：0.010％以下，Si：0.1％以下，Mn：0.06〜1.5％，P：0.15％以下，S：0.020％以下的比例含有Sol。 Al：0.10〜0.40％，N：0.010％以下，Ti：0.003〜0.010％，Nb：0.003〜0.040％，B：0.0002〜0.0020％，Mo：0.05％以下，Sb：0.005〜 0.05％，Sn：0.005〜0.05％时，Sb和Sn的总量在添加到钢板中时Sb和Sn的总量在0.005〜0.1％的范围内，余量由Fe和其他不可避免的杂质构成。该钢板具有平均直径为1d以下，抗张强度为28〜50Df / D的表面附聚物。

4. 发明申请

WO2006118424A1 COLD ROLLED STEEL SHEET HAVING HIGH YIELD RATIO AND LESS ANISOTROPY, PROCESS FOR PRODUCING THE SAME 审中-公开
标题翻译：具有高效率和低折射率的冷轧钢板，其生产方法
公开(公告)号：WO2006118424A1
公开(公告)日：2006-11-09
申请号：PCT/KR2006/001669
申请日：2006-05-03
申请人： POSCO , YOON, Jeong-Bong , CHUNG, Jin-Hee , CHIN, Kwang-Geun , HAN, Sang-Ho , KIM, Sung-Il , KIM, Ho-Seok
发明人： YOON, Jeong-Bong , CHUNG, Jin-Hee , CHIN, Kwang-Geun , HAN, Sang-Ho , KIM, Sung-Il , KIM, Ho-Seok
IPC分类号： C22C38/00
CPC分类号： C21D9/48 , C21D8/0426 , C21D8/0436 , C21D8/0463 , C21D8/0473 , C21D2211/004 , C22C38/002 , C22C38/004 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/60
摘要： Disclosed herein is a Nb-Ti composite IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 μm or less are distributed. The distribution of fine precipitates in the Nb-Ti composite IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipitates allow the formation of minute crystal grains. As a result, dissolved carbon is present in a larger amount in the crystal grain boundaries than within the crystal grains, which is advantageous in terms of room-temperature non-aging properties and bake hardenability.
摘要翻译：本发明公开了分散有0.2μm以下的微细析出物，例如CuS析出物的Nb-Ti复合IF钢。 Nb-Ti复合IF钢中微细析出物的分布提高了屈服强度，降低了面内各向异性指数。纳米尺寸的析出物允许形成微小的晶粒。结果，溶解碳比晶粒内的晶粒边界更多地存在，这在室温非时效性和烘烤淬透性方面是有利的。

5. 发明申请

WO2006118423A1 COLD ROLLED STEEL SHEET HAVING SUPERIOR FORMABILITY , PROCESS FOR PRODUCING THE SAME 审中-公开
标题翻译：具有优越性的冷轧钢板及其制造方法
公开(公告)号：WO2006118423A1
公开(公告)日：2006-11-09
申请号：PCT/KR2006/001668
申请日：2006-05-03
申请人： POSCO , PARK, Man-Young , YOON, Jeong-Bong , HAN, Sang-Ho , KIM, Sung-Il , CHIN, Kwang-Geun , KIM, Ho-Seok , CHUNG, Jin-Hee
发明人： YOON, Jeong-Bong , HAN, Sang-Ho , KIM, Sung-Il , CHIN, Kwang-Geun , KIM, Ho-Seok , CHUNG, Jin-Hee
IPC分类号： C22C38/00
CPC分类号： C22C38/004 , C21D8/02 , C21D8/04 , C21D9/46 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16 , C22C38/60
摘要： Disclosed herein is a Ti-based IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 μm or less are distributed. The distribution of fine precipitates in the Ti-based IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipitates allow the formation of minute crystal grains. As a result, dissolved carbon is present in a larger amount in the crystal grain boundaries than within the crystal grains, which is advantageous in terms of room-temperature non-aging properties and bake hardenability.
摘要翻译：本发明公开了分散有0.2μm以下的微细析出物，例如CuS析出物的Ti系IF钢。 Ti型IF钢中微细析出物的分布提高了屈服强度，降低了面内各向异性指数。纳米尺寸的析出物允许形成微小的晶粒。结果，溶解碳比晶粒内的晶粒边界更多地存在，这在室温非时效性和烘烤淬透性方面是有利的。

6. 发明申请

WO2006080670A1 HIGH STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT SHAPE FREEZABILITY, AND METHOD FOR MANUFACTURING THE SAME 审中-公开
标题翻译：具有优异形状可冷冻性的高强度冷轧钢板及其制造方法
公开(公告)号：WO2006080670A1
公开(公告)日：2006-08-03
申请号：PCT/KR2005/003239
申请日：2005-09-30
申请人： POSCO , CHOI, Shi-Hoon , KIM, Chin-Chul , CHIN, Kwang-Geun
发明人： CHOI, Shi-Hoon , KIM, Chin-Chul , CHIN, Kwang-Geun
IPC分类号： C22C38/00
CPC分类号： C21D9/46 , C21D6/02 , C21D8/02 , C22C38/00 , C22C38/001 , C22C38/04 , C22C38/14
摘要： A high-strength isotropic cold-rolled steel sheet having excellent shape-fixability, and a method for manufacturing the same are disclosed. The steel sheet is made using a low-carbon steel comprising a little amounts of Ti to have an r of 1.3 or less, r approaching 1, and a low in-plane anisotropy index (Dr) of 0.15 or less, ensuring excellent shape-fixability so as to be suitable for automotive outer panels which are essentially subjected to deformation in a stretching mode.
摘要翻译：公开了具有优异形状定影性的高强度各向同性冷轧钢板及其制造方法。钢板使用包含少量Ti的低碳钢制成，r为1.3以下，r接近1，面内各向异性指数（Dr）为0.15以下，确保优异的形状，固定性，以适用于基本上在拉伸模式下变形的汽车外板。

7. 发明申请

WO2007064172A9 STEEL SHEET FOR HOT PRESS FORMING HAVING EXCELLENT HEAT TREATMENT AND IMPACT PROPERTY, HOT PRESS PARTS MADE OF IT AND THE METHOD FOR MANUFACTURING THEREOF 审中-公开
标题翻译：用于具有优良热处理和冲击性能的热压成型钢板，其热压件及其制造方法
公开(公告)号：WO2007064172A9
公开(公告)日：2010-07-15
申请号：PCT/KR2006005155
申请日：2006-12-01
申请人： POSCO , OH JIN-KEUN , BAE DAE-CHUL , KIM SEONG-JU , CHIN KWANG-GEUN , LEE JAE-RYUNG , PARK YOUNG-JUN
发明人： OH JIN-KEUN , BAE DAE-CHUL , KIM SEONG-JU , CHIN KWANG-GEUN , LEE JAE-RYUNG , PARK YOUNG-JUN
IPC分类号： C22C38/04 , C22C38/00
CPC分类号： C22C38/02 , C22C38/001 , C22C38/04 , C22C38/06 , Y10T428/12 , Y10T428/12972
摘要： Disclosed is a steel sheet that exhibits an ultra-high strength after hot press forming followed by rapid cooling, and an enhanced yield strength after painting. The steel sheet has a composition comprising 0.1% to 0.5% by weight of C, 0.01% to 1.0% by weight of Si, 0.5% to 4.0% by weight of Mn, 0.1 % by weight or less of P, 0.03% by weight or less of S, 0.1 % by weight of soluble Al, 0.01% to 0.1% by weight of N, 0.3% by weight or less of W, and the balance Fe and other inevitable impurities. Further disclosed are a hot-pressed part made of the steel sheet and a method for manufacturing the hot-pressed part. The hot-pressed part achieves a high increment in yield strength after heat treatment for painting while ensuring an ultra-high tensile strength. Furthermore, the hot-pressed part exhibits superior adhesion to a coatinglayer, good surface appearance and improved corrosion resistance after painting.
摘要翻译：公开了一种在热压成型后快速冷却时具有超高强度的钢板，涂装后的屈服强度提高。该钢板具有0.1〜0.5重量％的C，0.01〜1.0重量％的Si，0.5〜4.0重量％的Mn，0.1重量％以下的P，0.03重量％或更少的S，0.1重量％的可溶性Al，0.01〜0.1重量％的N，0.3重量％以下的W，余量为Fe等不可避免的杂质。进一步公开了由钢板制成的热压部件和制造热压部件的方法。热压部件在确保超高抗拉强度的同时，在涂装热处理后的屈服强度增加很大。此外，热压部件对涂布层具有优异的粘附性，良好的表面外观和改善的涂漆后的耐腐蚀性。

8. 发明申请

WO2008078904A1 HIGH STRENGTH STEEL PLATE WITH HIGH MANGANESE HAVING EXCELLENT BURRING WORKABILITY 审中-公开
标题翻译：高强度高强度钢板具有优异的加工性能
公开(公告)号：WO2008078904A1
公开(公告)日：2008-07-03
申请号：PCT/KR2007/006675
申请日：2007-12-20
申请人： POSCO , KIM, Sung Kyu , CHIN, Kwang Geun
发明人： KIM, Sung Kyu , CHIN, Kwang Geun
IPC分类号： C22C38/00
CPC分类号： C22C38/06 , C21D6/005 , C21D8/0226 , C21D8/0247 , C21D9/46 , C21D2211/001 , C22C38/04 , C22C38/60
摘要： There is provided a high strength steel plate with high manganese having excellent burring workability, which is used for structural members, bumper reinforcing materials and impact absorbing materials of automobiles, etc. The high strength steel plate includes, by weight: C: 0.2 to 1.0 %, Mn: 10 to 25 %, Al: 0.3 to 3.0 %, S: 0.05 % or less, P: 0.05 % or less, and the balance of Fe and inevitable impurities, wherein the chemical elements satisfactorily have a grain size of 18 D or more. The high strength steel plate can be useful to facilitate formation of automobile parts since it has excellent physical properties such as elongation and hole expansibility as well as strength.
摘要翻译：本发明提供一种高强度钢板，其具有优良的加工性能，用于结构件，保险杠加强材料和汽车的冲击吸收材料等。高强度钢板包括：C：0.2至1.0 ％，Mn：10〜25％，Al：0.3〜3.0％，S：0.05％以下，P：0.05％以下，余量由Fe和不可避免的杂质构成，其中化学元素满意度为18 D或更多。高强度钢板由于具有优异的物理性能，例如伸长率，孔扩展性以及强度，因此可用于促进汽车部件的形成。

9. 发明申请

WO2008078901A1 THE METHOD FOR MANUFACTURING THIN STEEL SHEET FOR DEEP DRAWING HAVING EXCELLENT WORKABILITY 审中-公开
标题翻译：制造具有良好工作性能的深层薄钢板的方法
公开(公告)号：WO2008078901A1
公开(公告)日：2008-07-03
申请号：PCT/KR2007006628
申请日：2007-12-18
申请人： POSCO , KANG HEE JAE , CHIN KWANG GEUN , SOHN IL RYOUNG
发明人： KANG HEE JAE , CHIN KWANG GEUN , SOHN IL RYOUNG
IPC分类号： C21D8/02
CPC分类号： C21D9/48 , C21D8/0426 , C21D8/0436 , C21D8/0463 , C21D8/0473 , C23C2/02 , C23C2/06 , C23C2/28
摘要： There is provided a method for manufacturing a thin steel sheet for deep drawing having excellent workability that is generally used for inner and outer panels of an automobile body. A method includes reheating steel slabs containing, by weight%, C: 0.010% or less, Si: 0.4% or less, Mn: 0.06-1.5%, P: 0.03-0.15%, S: 0.020% or less, Sol. Al: 0.40% or less, N: 0.010% or less, Ti: 0.003-0.05%, Nb: 0.003-0.05%, Mo: 0.10% or less, B: 0.0002-0.0030%, one or both of Sb: 0.005-0.10% and Sn: 0.005-0.10%, the balance Fe, and unavoidable impurities, completing finish rolling the reheated steel slabs at the single phase austenite region while a reduction ratio of rough rolling and finish rolling is in the range of 1.0 (50%:50%)-4.0 (80%:20%), and strip- cooling rate of final three pass is 30°C/sec or more during finish rolling, coiling the finish rolled steel sheet, cold rolling the coiled hot-rolled steel sheet at a cold rolling reduction ratio of 60% or more, and continuously annealing the cold-rolled steel sheet at a temperature of a range of 780-8600C, in which the average size of precipitates satisfies 20-60 nm. As described above, according to the embodiment of the present invention, it is possible to provide a thin steel sheet for deep drawing having tensile strength of 28-50 kg/mm and more excellent workability and galvanizing properties than a thin steel sheet for deep drawing according to the related art.
摘要翻译：提供一种用于制造用于深冲压的薄钢板的方法，该方法通常用于汽车车身的内外板。一种方法包括以重量％计含有C：0.010％以下，Si：0.4％以下，Mn：0.06〜1.5％，P：0.03〜0.15％，S：0.020％以下的钢坯。 Al：0.40％以下，N：0.010％以下，Ti：0.003〜0.05％，Nb：0.003〜0.05％，Mo：0.10％以下，B：0.0002〜0.0030％，Sb：0.005〜 0.10％，Sn：0.005〜0.10％，余量为Fe和不可避免的杂质，在单相奥氏体区域中完成对再热钢坯的精轧，而粗轧和精轧的压下率在1.0（50％：50％） - 4.0（80％：20％），最终三遍的剥离冷却速度在精轧过程中为30℃/秒以上，卷取精轧钢板，冷轧卷取的热轧钢在冷轧压下率为60％以上的条件下，在780〜8600℃的范围内连续退火冷却钢板，其中析出物的平均粒径为20〜60nm。如上所述，根据本发明的实施方式，能够提供拉伸强度为28〜50kg / mm的深拉伸用薄钢板和与深冲的薄钢板相比具有更优异的加工性和镀锌性根据现有技术。

10. 发明申请

WO2010074458A3 HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING SUPERIOR DEEP DRAWABILITY AND A HIGH YIELD RATIO, GALVANIZED STEEL SHEET USING SAME, ALLOYED GALVANIZED STEEL SHEET, AND METHOD FOR MANUFACTURING SAME 审中-公开
标题翻译：具有优良深冲性和高屈服比的高强度冷轧钢板，使用该钢板的镀锌钢板，合金镀锌钢板及其制造方法
公开(公告)号：WO2010074458A3
公开(公告)日：2010-08-26
申请号：PCT/KR2009007608
申请日：2009-12-18
申请人： POSCO , LEE KYOO-YOUNG , CHIN KWANG-GEUN , KIM JONG-SANG , HONG YOUNG-KWANG
发明人： LEE KYOO-YOUNG , CHIN KWANG-GEUN , KIM JONG-SANG , HONG YOUNG-KWANG
IPC分类号： C22C38/00 , C21D8/02 , C22C38/14 , C23C2/06
CPC分类号： C23C2/06 , C21D8/0436 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12
摘要： The present invention relates to a cold rolled steel sheet having a yield ratio of 60% or higher, superior dent resistance and durability, superior drawability having an r-value of 1.4 or higher, and a superior tensile strength of 490 MPa or higher, to a galvanized steel sheet using same, to an alloyed galvanized steel sheet, and to a method for manufacturing same. More particularly, the present invention relates to a high-strength cold rolled steel sheet having superior deep drawability and a high yield ratio, comprising, by weight, C: 0.02-0.05%, Mn: 1.0-3.0%, Si: 0.5-2.0%, P: 0.05% or less, N: 0.006% or less, Al: 0.01-0.1%, S: 0.012% or less, and Nb: 0.04-0.15%, and one or more components selected from a group consisting of Ti, B, and Zr, wherein said components satisfy the condition in which the following Eq_N value is 0.001 or less and the following Eq_C value is 0.03 or less. The residuals consist of Fe and inevitable impurities, and the fraction of the retained austenite is 5% or less. The present invention also relates to a galvanized steel sheet using same, to an alloyed galvanized steel sheet, and to a method for manufacturing same. Eq_N = N - 14 × (Ti/47.9 + Zr/91.2 + B/10.8) Eq_C = C - 12/92.9 × Nb Eq_C = C - 12 × (Nb/92.9 + (Ti - 47.9/14 ×N)/47.9+ (Zr - 91.2/14 × N)/91.2) (wherein, if Ti - 47.9/14 ×N
摘要翻译：本发明涉及屈服比为60％以上，耐凹痕性和耐久性优异，r值为1.4以上，拉伸强度为490MPa以上的优异的拉伸加工性的冷轧钢板，使用其的镀锌钢板，合金化镀锌钢板及其制造方法。更具体地说，本发明涉及一种深冲性和屈服比高的高强度冷轧钢板，其特征在于，含有C：0.02〜0.05％，Mn：1.0〜3.0％，Si：0.5〜2.0 ，P：0.05％以下，N：0.006％以下，Al：0.01〜0.1％，S：0.012％以下，Nb：0.04〜0.15％，以及选自Ti B和Zr，其中所述组分满足下列Eq_N值为0.001或更小并且以下Eq_C值为0.03或更小的条件。残留物由Fe和不可避免的杂质构成，残留奥氏体的比例为5％以下。本发明还涉及使用其的镀锌钢板，合金化镀锌钢板及其制造方法。 Eq_N = N-14×（Ti / 47.9 + Zr / 91.2 + B / 10.8）Eq_C = C-12 / 92.9×Nb Eq_C = C-12×（Nb / 92.9 + / 14×N）/47.9+(Zr-91.2/14×N）/91.2）<添加Zr>（其中，如果Ti-47.9 / 14×N <0，则认为Ti-47.9 / 14×N为 0，如果Zr - 91.2 / 14×N <0，Zr - 91.2 / 14×N被视为0）。

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