公开(公告)号：EP3284841A1

公开(公告)日：2018-02-21

申请号：EP16780104.2

申请日：2016-04-14

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： TANAKA, Yasuaki ,  SAKAKIBARA, Mutsumi ,  YOKOYAMA, Takafumi ,  KAWATA, Hiroyuki ,  SUGIURA, Natsuko ,  KONDO, Yasumitsu

IPC分类号： C22C38/00 ,  C22C38/60 ,  B21B1/26 ,  C21D9/46

CPC分类号： C21D9/46 ,  B21B1/22 ,  B21B1/26 ,  B21B2001/225 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/60

摘要： A hot-rolled steel sheet in which the formation of an internal oxidized layer is suppressed and which is excellent in workability is provided. A hot-rolled steel sheet according to the present embodiment has a chemical composition containing, in mass%: C: 0.07 to 0.30%, Si: more than 1.0 to 2.8%, Mn: 2.0 to 3.5%, P: 0.030% or less, S: 0.010% or less, Al: 0.01 to less than 1.0%, N: 0.01% or less, O: 0.01% or less, and one or more types selected from the group consisting of Sb, Sn and Te in a total amount of 0.03 to 0.30%, with a balance being Fe and impurities, and satisfying Formula (1). The micro-structure of the hot-rolled steel sheet includes ferrite and pearlite in a total amount of 50 area% or more. The tensile strength of the hot-rolled steel sheet is 900 MPa or less. Si + Mn ≥ 3.20 Where, a content (mass%) of a corresponding element is substituted for each symbol of an element in Formula (1).

摘要翻译： 提供一种热轧钢板，其内部氧化层的形成得到抑制，并且加工性优异。 本实施方式的热轧钢板具有以质量％计含有C：0.07〜0.30％，Si：超过1.0〜2.8％，Mn：2.0〜3.5％，P：0.030％以下的化学组成 ，S：0.010％以下，Al：0.01〜小于1.0％，N：0.01％以下，O：0.01％以下，以及选自Sb，Sn和Te中的1种以上 的量为0.03〜0.30％，余量由Fe和杂质构成，满足式（1）。 热轧钢板的显微组织含有总量为50面积％以上的铁素体和珠光体。 热轧钢板的拉伸强度为900MPa以下。 Si +Mn≥3.20其中，式（1）中元素的每个符号代表相应元素的含量（质量％）。

公开(公告)号：EP1932932B1

公开(公告)日：2016-05-04

申请号：EP05793808.6

申请日：2005-10-05

申请人： Nippon Steel & Sumitomo Metal Corporation ,  ArcelorMittal

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

IPC分类号： C21D8/02 ,  C22C38/32 ,  C23C2/28 ,  C21D9/46 ,  C23C2/06 ,  C22C38/00 ,  B21B3/02

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

公开(公告)号：EP3495528A1

公开(公告)日：2019-06-12

申请号：EP17837115.9

申请日：2017-08-04

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： SANO, Kohichi ,  UNO, Makoto ,  NISHIYAMA, Ryoichi ,  YAMAGUCHI, Yuji ,  SUGIURA, Natsuko ,  NAKATA, Masahiro

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

摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 30 to 95%, and bainite: 5 to 70%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 µ m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. An average aspect ratio of ellipses equivalent to the crystal grains is 5 or less. An average distribution density of the total of Ti-based carbides and Nb-based carbides each having a grain size of 20 nm or more on ferrite grain boundaries is 10 carbides/ µ m or less.

公开(公告)号：EP2738278A1

公开(公告)日：2014-06-04

申请号：EP12820033.4

申请日：2012-07-27

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： MINAMI, Akinobu ,  KAWATA, Hiroyuki ,  MURASATO, Akinobu ,  YAMAGUCHI, Yuji ,  SUGIURA, Natsuko ,  KUWAYAMA, Takuya ,  MURUYAMA, Naoki ,  SUZUKI, Takamasa

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D9/46 ,  C22C38/06 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C28/00 ,  C25D5/26

摘要： The present invention provides a high-strength steel sheet excellent in shape fixability. The high-strength steel sheet contains C, Si, Mn, P, S, Al, N, and O with predetermined contents, in which a retained austenite phase of 5 to 20% in volume fraction is contained, an amount of solid-solution C contained in the retained austenite phase is 0.80 to 1.00% in mass%, W Siγ is 1.10 times or more W Si* , W Mnγ is 1.10 times or more W Mn* , and when a frequency distribution is measured with respect to a sum of a ratio between W Si and W Si* and a ratio between W Al and W Al* , a mode value of the frequency distribution is 1.95 to 2.05, and a kurtosis is 2.00 or more.

摘要翻译： 本发明提供一种高强度钢板具有优异的形状固定性。 所述的高强度钢板含有C，硅，锰，P，S，铝，N，和O的与预定的内容，其中，在体积分数为5％至20％的残留奥氏体相上包含的固溶量 包含在残余奥氏体相中C为0.80至1：以质量％计00％，WSi³为W的Si * 1.10倍以上，WmN³是1.10倍以上W¯¯的Mn *，并且当频率分布进行测定相对于总和 W和W姒似*和W和W的Al的Al *之间的比率之间的比率，频率分布的最频值是1.95至2.05，和峰度是2.00以上。

公开(公告)号：EP2738276A1

公开(公告)日：2014-06-04

申请号：EP12819665.6

申请日：2012-07-27

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： KAWATA, Hiroyuki ,  MARUYAMA, Naoki ,  MURASATO, Akinobu ,  MINAMI, Akinobu ,  YASUI, Takeshi ,  YAMAGUCHI, Yuji ,  SUGIURA, Natsuko

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D9/46 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28 ,  C25D5/26

CPC分类号： C22C38/38 ,  B32B15/013 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12799

摘要： High strength steel sheet and high strength galvanized steel sheet which are excellent in shapeability which secure a tensile maximum strength 900 MPa or more high strength while obtaining excellent ductility and stretch flangeability, which sheets have predetermined compositions of ingredients, have steel sheet structures which contain volume fraction 1 to 20% of residual austenite phases, and which have martensite transformation points of the residual austenite phases of -60°C or less.

摘要翻译： 高强度钢板及高强度热镀锌钢板，其具有优异的同时，获得优异的延展性和拉伸凸缘性，其中片材具有预定的成分的组合物，其确保最大抗拉强度为900MPa以上的高强度的形状的能力，有钢板结构，该结构容纳体积 级分1至残余奥氏体相的20％，并且其具有-60℃或更低的残余奥氏体相的马氏体转变点。

公开(公告)号：EP2088218B1

公开(公告)日：2017-09-13

申请号：EP07831772.4

申请日：2007-11-07

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： SUGIURA, Natsuko ,  MARUYAMA, Naoki ,  TAKAHASHI, Manabu ,  NAKAMURA, Yohji ,  HANYA, Koji

IPC分类号： C22C38/00 ,  B21B3/00 ,  C21D9/46 ,  C22C38/14 ,  C22C38/58 ,  C23C2/06 ,  C23C2/38 ,  C21D6/00 ,  C21D8/02 ,  C21D8/04 ,  C22C38/02 ,  C22C38/12 ,  C23C2/40 ,  C22C38/04

CPC分类号： C23C2/40 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D8/0426 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C23C2/06 ,  Y10T428/12799

摘要： Steel sheet having a composition of ingredients containing substantially, by mass%, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship of Ti-48/14×N‰¥0.0005, having a sum of the X-ray random intensity ratios of the {100} orientation and the {110} orientation of a 1/6 sheet thickness part of 5 or less, having a sum of the maximum value of the X-ray random intensity ratios of the {110} to {110} orientation group and the X-ray random intensity ratios of the {211} orientation of 5 or more, and having a high rolling direction Young's modulus measured by the static tension method and a method of production of the same are provided.

摘要翻译： 具有以质量％计实质上含有C：0.005〜0.200％，Si：2.50％以下，Mn：0.10〜3.00％，N：0.0100％以下，Nb：0.005〜0.100％和 Ti：0.002〜0.150％，满足{100} <001>方位和{110} <001>方位的X射线随机强度之和为Ti-48/14×N‰0.0005的关系。 具有{110} <111>至{110} <112>取向基团的X射线随机强度比的最大值与X射线衍射图的X射线随机强度比的最大值之和为5或更小的1/6板厚部分的取向， {211} <111>取向的X射线随机强度比为5以上，并且具有高的轧制方向由静态拉伸法测量的杨氏模量及其制造方法。

公开(公告)号：EP2881483A1

公开(公告)日：2015-06-10

申请号：EP13826234.0

申请日：2013-07-31

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： SUGIURA, Natsuko ,  YONEMURA, Shigeru ,  MARUYAMA, Naoki

IPC分类号： C22C38/00 ,  B21B1/22 ,  B21B3/00 ,  C21D9/48 ,  C22C38/14 ,  C22C38/58 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/26

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0405 ,  C21D8/0436 ,  C21D8/0447 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/46 ,  C21D9/48 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36 ,  C25D7/0614 ,  Y10T428/12799

摘要： A cold-rolled steel sheet containing: in mass%, C: 0.0005 to 0.0045%; Mn: 0.80 to 2.50%; Ti: 0.002 to 0.150%; B: 0.0005 to 0.01%, in which (1) Expression is satisfied, and a balance being composed of iron and impurities, in which at the position of 1/4 thickness of a sheet thickness, a random intensity ratio (A) of the {332} orientation is 3 or less, a random intensity ratio (B) of the {557} orientation and a random intensity ratio (C) of the {111} orientation are both 7 or more, and {(B)/(A) ≧ 5} and {(B) > (C)} are satisfied.

摘要翻译： 的冷轧钢板含有：以质量％计，C：0.0005〜0.0045％; 锰：0.80〜2：50％; 钛：0.002〜0.150％; B：0.0005〜12：01％，其中（1）表达式被满足，并且在平衡的四分之一厚度的板厚的，随机强度比（A）的位置被由铁和杂质的哪 {332} <110>取向是3或更小，则{557} <9 16 5>取向的随机强度比（B）和{111} <112>取向的随机强度比（C）都是7 以上，{（B）/（A）‰§5}和{（B）>（C）}被满足。

公开(公告)号：EP3495527A1

公开(公告)日：2019-06-12

申请号：EP17837114.2

申请日：2017-08-04

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： SANO, Kohichi ,  UNO, Makoto ,  NISHIYAMA, Ryoichi ,  YAMAGUCHI, Yuji ,  SUGIURA, Natsuko ,  NAKATA, Masahiro

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

摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 60%, and bainite: 40 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 µ m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. A precipitate density of Ti(C,N) and Nb(C,N) each having a circle-equivalent diameter of 10 nm or less is 10 10 precipitates/mm 3 or more. A ratio (Hvs/Hvc) of a hardness at 20 µ m in depth from a surface (Hvs) to a hardness of the center of a sheet thickness (Hvc) is 0.85 or more.

公开(公告)号：EP2738276B1

公开(公告)日：2019-04-24

申请号：EP12819665.6

申请日：2012-07-27

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： KAWATA, Hiroyuki ,  MARUYAMA, Naoki ,  MURASATO, Akinobu ,  MINAMI, Akinobu ,  YASUI, Takeshi ,  YAMAGUCHI, Yuji ,  SUGIURA, Natsuko

IPC分类号： C22C38/00 ,  B32B15/01 ,  C21D9/46 ,  C21D8/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

公开(公告)号：EP2530179B1

公开(公告)日：2018-11-14

申请号：EP11737032.0

申请日：2011-01-26

申请人： Nippon Steel & Sumitomo Metal 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 ,  C21D8/04 ,  C23C2/04 ,  C23C2/26 ,  C21D9/48 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02

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.