公开(公告)号：EP2256224A1

公开(公告)日：2010-12-01

申请号：EP09724026.1

申请日：2009-03-26

申请人： Nippon Steel Corporation

发明人： AZUMA, Masafumi ,  YOSHINAGA, Naoki ,  MARUYAMA, Naoki ,  SUZUKI, Noriyuki ,  SAKUMA, Yasuharu

IPC分类号： C22C38/00 ,  C21D8/04 ,  C22C38/38 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28

CPC分类号： C22C38/32 ,  C21D8/0226 ,  C21D8/04 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/28 ,  C22C38/38 ,  C23C2/02 ,  C23C2/04 ,  C23C2/26 ,  C23C2/28 ,  Y10T428/12799

摘要： This cold-rolled steel sheet includes, in terms of mass %, C: not less than 0.05% and not more than 0.095%, Cr: not less than 0.15% and not more than 2.0%, B: not less than 0.0003% and not more than 0.01%, Si: not less than 0.3% and not more than 2.0%, Mn: not less than 1.7% and not more than 2.6%, Ti: not less than 0.005% and not more than 0.14%, P: not more than 0.03%, S: not more than 0.01%, Al: not more than 0.1%, N: less than 0.005%, O: not less than 0.0005% and not more than 0.005%, and contains as the remainder, iron and unavoidable impurities, wherein the microstructure of the steel sheet includes mainly polygonal ferrite having a crystal grain size of not more than 4 µm, and hard microstructures of bainite and martensite, the block size of the martensite is not more than 0.9 µm, the Cr content within the martensite is 1.1 to 1.5 times the Cr content within the polygonal ferrite, and the tensile strength is at least 880 MPa.

摘要翻译： 这个冷轧钢板包括，以质量％计，C：不小于0.05％和不大于0.095％以下，Cr：大于等于0.15％和不大于2.0％，B：不小于0.0003％及 不超过0：01％以下，Si：不小于0.3％和不大于2.0％以下，Mn：不小于1.7％和不大于2.6％以下，Ti：低于0.005％并且不大于0.14％到，P： 不超过0.03％到，S：不超过12：01％以下，Al：不大于0.1％，N：小于0.005％，O：不低于0.0005％并且不大于0.005％，并含有作为剩余部分，铁 和不可避免的杂质，worin钢板的显微组织包括具有不大于4微米的晶粒尺寸主要多边形铁素体，和贝氏体及马氏体的硬质组织，马氏体的块尺寸不大于0.9微米，将Cr 马氏体中的含量为多边形铁素体中的Cr含量的1.1〜1.5倍，拉伸强度至少为880兆帕。

公开(公告)号：EP1806421A1

公开(公告)日：2007-07-11

申请号：EP05767035.8

申请日：2005-07-27

申请人： NIPPON STEEL CORPORATION

发明人： SUGIURA, Natsuko c/o Nippon Steel Corporation ,  YOSHINAGA, Naoki ,  HIWATASHI, Shunji ,  TAKAHASHI, Manabu c/o Nippon Steel Corporation ,  HANYA, Koji ,  UNO, Nobuyoshi ,  KANNO, Ryoichi ,  MIYASAKA, Akihiro ,  SENUMA, Takehide

IPC分类号： C22C38/00 ,  C22C38/12 ,  C22C38/58 ,  C21D9/46

CPC分类号： C21D9/46 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12 ,  Y10T428/1266 ,  Y10T428/12799

摘要： One aspect of the steel sheet having high Young's modulus includes in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, S: 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and A1: 0.15% or less, with the remainder being Fe and unavoidable impurities, wherein one or both of {110} pole density and {110} pole density in the 1/8 sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa. Another aspect of the steel sheet having high Young's modulus includes, in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 0.1 to 5.0%, P: 0.15% or less, S: 0.015% or less, Al: 0.15% or less, N: 0.01% or less, and further comprises one or two or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14xN (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.91 mass %, with the remainder being Fe and unavoidable impurities, wherein the {110} pole density and/or the {110} pole density in the 1/8 sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa.

摘要翻译： 具有高的杨氏模量在钢板的一个方面包括以质量％计，C：0.0005〜0：30％以下，Si：2.5％以下，Mn：2.7〜5.0％，P：0.15％以下，S：0.015％或 以下，Mo：0.15〜1.5％，B：0.0006〜0：01％，和A1：0.15％以下，余量为Fe和不可避免的杂质，worin之一或两者的{110} <223>极密度和{110} 在1/8板厚层<111>极密度为10以上，且杨氏模量在轧制方向超过为230GPa。 具有高的杨氏模量在钢板的另一个方面包括，在以质量％计，C：0.0005〜0：30％以下，Si：2.5％以下，Mn：0.1〜5.0％，P：0.15％以下，S：0.015％ 或以下，Al：0.15％以下，N：0.01％以下，并且还包含一个或两个或更多的Mo：0.005〜1.5％以下，Nb：0.005〜0：20％以下，Ti：至少48 / 14xN（质量％ ）和0.2％或以下，B：0.0001〜0：01％，以0.015的总含量，以1.91质量％，余量为Fe和不可避免的杂质，worin {110} <223>极密度和/或{ 110}在1/8板厚层<111>极密度为10以上，且杨氏模量在轧制方向超过为230GPa。

公开(公告)号：EP2267175A1

公开(公告)日：2010-12-29

申请号：EP08873613.7

申请日：2008-11-12

申请人： Nippon Steel Corporation

发明人： YOSHINAGA, Naoki ,  AZUMA, Masafumi ,  SAKUMA, Yasuharu ,  MARUYAMA, Naoki

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D9/46 ,  C22C38/14 ,  C22C38/58 ,  C23C2/02 ,  C23C2/28

CPC分类号： C22C38/14 ,  C21D8/0426 ,  C21D8/0463 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/28

摘要： This hot-rolled steel sheet contains, in terms of mass%, C: 0.015% or more to less than 0.040%; Si: less than 0.05%; Mn: 0.9% or more to 1.8% or less; P: less than 0.02%; S: less than 0.01%; Al: less than 0.1%; N: less than 0.006%; and Ti: 0.05% or more to less than 0.11%, with the remainder being Fe and inevitable impurities, wherein Ti/C is in a range of 2.5 or more to less than 3.5, Nb, Zr, V, Cr, Mo, B and W are not included, a microstructure includes a mixed microstructure of polygonal ferrite and quasi-polygonal ferrite in a proportion of greater than 96%, a maximum tensile strength is 520 MPa or more and less than 720 MPa, an aging index AI is more than 15 MPa, a product of a hole expansion ratio (λ) % and a total elongation (El) % is 2350 or more, and a fatigue limit is 200 MPa or more.

摘要翻译： 这种热轧钢板含有，以质量％计，C：0.015％以上且低于0.040％; 的Si：低于0.05％; 的Mn：0.9％以上且1.8％以下; P：低于0.02％到; S：小于0.01％到; 的Al：低于0.1％; N：小于0.006％; 和Ti：0.05％以上且小于0.11％，，余量为Fe和不可避免的杂质，worin的Ti / C是在范围为2.5以上至小于3.5，铌，锆，钒，铬，钼，B 和W不包括在内，一个微结构包括多边形铁素体和准多边形铁素体中的大于96％的比例混合组织，最高抗拉强度为520 MPa以上且小于720兆帕，以时效指数AI是更 大于15兆帕，的扩孔率（“）％的产物和总延伸率（EL）％是2350以上，疲劳极限为200MPa以上。

公开(公告)号：EP1362930A1

公开(公告)日：2003-11-19

申请号：EP02700640.2

申请日：2002-02-20

申请人： NIPPON STEEL CORPORATION

发明人： YOKOI, Tatsuo, c/o NIPPON STEEL CORP. OITA WORKS ,  SUGIURA, Natsuko ,  YOSHINAGA, Naoki ,  TSUCHIHASHI, Koichi, NIPPON STEEL CORP. OITA WORKS ,  NAKAMOTO, Takehiro, NIPPON STEEL CORP. OITA WORKS

IPC分类号： C22C38/00

CPC分类号： C22C38/002 ,  C21D8/0226 ,  C21D8/0273 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/40

摘要： The present invention provides a thin steel sheet, for automobile use, excellent in notch-fatigue strength, and a method for producing said steel sheet. Specifically, the present invention is a thin steel sheet for automobile use excellent in notch-fatigue strength, said steel sheet containing, in mass, 0.01 to 0.3% C, 0.01 to 2% Si, 0.05 to 3% Mn, 0.1% or less P, 0.01% or less S and 0.005 to 1% Al, with the balance consisting of Fe and unavoidable impurities, characterized in that, on a plane at an arbitrary depth within 0.5 mm from the surface of said steel sheet in the thickness direction thereof, the average of the ratios of the X-ray diffraction strength in the orientation component group of {100} to {223} to random X-ray diffraction strength is 2 or more and the average of the ratios of the X-ray diffraction strength in the three orientation components of {554} , {111} and {111} to random X-ray diffraction strength is 4 or less and that the thickness of said steel sheet is in the range from 0.5 to 12 mm, and a method for producing said steel sheet by subjecting a steel slab containing aforementioned chemical components to rolling at a total reduction ratio of 25% or more in a temperature range of the Ar 3 transformation temperature + 100°C or lower.

摘要翻译： 本发明提供了一种薄钢板，汽车用，具有优异的缺口疲劳强度，和用于产生所述钢板的方法。 具体而言，本发明是一种薄钢板的汽车用具有优异的缺口疲劳强度，所述钢片材包含，以质量，0.01份至0.3％的C，0.01份至2％的Si，0:05〜3％的Mn，0.1％或更少 P 0的：01％或更少的S和0.005〜1％的Al，余量为0.5毫米的范围内从所述钢片材的表面在厚度方向上由Fe和不可避免的杂质，在该特点的，在一个平面上以任意的其深度 中，平均的X射线衍射强度比的方位组件组的ä100ü<011>到ä223ü<110>到随机的X射线衍射强度为2以上，X射线的比率的平均 在ä554ü<225>的三个方位分量的衍射强度，ä111ü<112>和ä111ü<110>到随机的X射线衍射强度为4或更小并没有所述钢片材的厚度为0.5至12毫米的范围内 和通过使钢坯含aforementio用于产生所述钢板的方法 奈德化学成分以在一个温度范围内Ar 3相变温度+ 100℃以下的25％以上的总压下率轧制。

公开(公告)号：EP2530179A1

公开(公告)日：2012-12-05

申请号：EP11737032.0

申请日：2011-01-26

申请人： Nippon Steel Corporation

发明人： SANO, Kohichi ,  WAKABAYASHI, Chisato ,  KAWATA, Hiroyuki ,  OKAMOTO, Riki ,  YOSHINAGA, Naoki ,  KAWASAKI, Kaoru ,  SUGIURA, Natsuko ,  FUJITA, Nobuhiro

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D9/46 ,  C22C38/38 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC分类号： C22C38/02 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C23C2/04 ,  C23C2/26 ,  C23C2/28

摘要： A high-strength cold-rolled steel sheet includes, by mass%, C: 0.10% to 0.40%, Mn: 0.5% to 4.0%, Si: 0.005% to 2.5%, Al: 0.005% to 2.5%, Cr: 0% to 1.0%, and a balance of iron and inevitable impurities, in which an amount of P is limited to 0.05% or less, an amount of S is limited to 0.02% or less, an amount ofN is limited to 0.006% or less, the microstructure includes 2% to 30% of retained austenite by area percentage, martensite is limited to 20% or less by area percentage in the microstructure, an average particle size of cementite is 0.01 µm to 1 µm, and 30% to 100% of the cementite has an aspect ratio of 1 to 3.

摘要翻译： 高强度冷轧钢板以质量％计含有C：0.10〜0.40％，Mn：0.5〜4.0％，Si：0.005〜2.5％，Al：0.005〜2.5％，Cr：0 ％以上且1.0％以下，余量为铁和不可避免的杂质，将P量限制在0.05％以下，S量限制在0.02％以下，N量限制在0.006％以下 微观组织以面积率计含有2％〜30％的残留奥氏体，组织中的马氏体的面积率为20％以下，渗碳体的平均粒径为0.01μm〜1μm，以及30％〜100％ 的渗碳体具有1至3的纵横比。

公开(公告)号：EP2264206A1

公开(公告)日：2010-12-22

申请号：EP09730413.3

申请日：2009-04-09

申请人： Nippon Steel Corporation

发明人： AZUMA, Masafumi ,  SUZUKI, Noriyuki ,  MARUYAMA, Naoki ,  YOSHINAGA, Naoki ,  MURASATO, Akinobu

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C38/06 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28

CPC分类号： C23C2/28 ,  C21D8/0236 ,  C21D8/0273 ,  C21D9/46 ,  C21D9/48 ,  C21D2201/05 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/02 ,  C23C2/06

摘要： The invention is directed to providing, for application in automobiles, construction materials, household appliances and the like, high-strength sheets excellent in formability properties such as hole expansibility and ductility, and also in fatigue resistance, characterized in comprising, in specified contents expressed in mass%, C, Si, Mn, P, S, Al, N and O and a balance of iron and unavoidable impurities, and having a steel sheet structure composed mainly of ferrite and hard structures, a crystal orientation difference between some ferrite adjacent to hard structures and the hard structures of less than 9°, and a maximum tensile strength of 540 MPa or greater.

摘要翻译： 本发明的目的在于提供，对于汽车应用，建筑材料，家用电器等中，高强度的片材具有优异的可成形性：如扩孔性和延展性，因此，在抗疲劳性，在包含特点是，在指定的内容中过表达 以质量％计，C，硅，锰，P，S，铝，N和O以及铁和不可避免的杂质，并且具有主要的铁素体和硬质组织构成的钢板组织，一些铁氧体adjacent-之间的晶体取向差的平衡 到硬质组织和小于9°的硬质组织，和540MPa以上的最大拉伸强度。

公开(公告)号：EP1932932A1

公开(公告)日：2008-06-18

申请号：EP05793808.6

申请日：2005-10-05

申请人： Nippon Steel Corporation

发明人： YOSHINAGA, Naoki ,  MARUYAMA, Naoki ,  TAKAHASHI, Manabu ,  SUGIURA, Natsuko

IPC分类号： C22C38/00 ,  C22C38/38 ,  C22C38/58 ,  C21D9/46 ,  B21B3/00 ,  C23C2/06

CPC分类号： C23C2/06 ,  B21B3/02 ,  C21D8/02 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/32 ,  C23C2/28

摘要： The invention provides a cold-rolled steel sheet excellent in paint bake hardenability and ordinary-temperature non-aging property comprising, in mass%, C: 0.0005 - 0.0040%, Si: 0.8% or less, Mn: 2.2% or less, S: 0.0005 - 0.009%, Cr: 0.4 - 1.3%, O: 0.003 - 0.020%, P: 0.045 - 0.12%, B: 0.0002 -0.0010%, Al: 0.008% or less, N: 0.001 - 0.007%, and a balance of Fe and unavoidable impurities. Ultra-low-carbon steel retaining solute N and containing added Cr, P, B and O is used to produce hot-rolled and cold-rolled steel sheet and hot-dip galvanized cold-rolled steel sheet that exhibit both high paint bake hardenability and ordinary-temperature non-aging property.

摘要翻译： 本发明提供一种冷轧钢板具有优良的漆烘烤硬化性和常温非时效性，其包括，以质量％计，C：0.0005 - 0.0040％以下，Si：0.8％以下，Mn：2.2％以下，S ：0.0005 - 0.009％以下，Cr：0.4 - 1.3％，O：0003-0020％，P：0.045 - 0.12％，B：0.0002 -0.0010％以下，Al：0.008％以下，N：0001-0007％，和一个 Fe和不可避免的杂质的平衡。 超低碳钢保持固溶N和含添加的Cr，P，B和O被用于生产热轧和冷轧钢板和热浸镀锌冷轧钢板并同时表现出高的涂料的烘烤硬化性和 常温非时效性。