公开(公告)号：US08197617B2

公开(公告)日：2012-06-12

申请号：US12303634

申请日：2007-06-04

申请人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

发明人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

IPC分类号： C22C38/04 ,  C22C38/06 ,  C22C38/22

CPC分类号： C22C38/02 ,  C21D9/46 ,  C22C38/04

摘要： The present invention provides a high-strength steel sheet which has a 980 MPa class tensile strength as well as has excellent elongation, stretch flangeability and weldability, and also has excellent anti-delayed fraction property. The high-strength steel sheet comprises steel satisfying: C: 0.12 to 0.25%, Si: 1.0 to 3.0%, Mn: 1.5 to 3.0%, P: 0.15% or less, S: 0.02% or less, Al: 0.4% or less, and comprising the remnant made from iron and unavoidable impurities, wherein a ratio of the contents of Si and C (Si/C) is within the range from 7 to 14 in terms of a mass ratio, and a microstructure in a longitudinal section comprises, by an occupancy ratio based on the entire structure, 1) bainitic ferrite: 50% or more, 2) lath-type residual austenite: 3% or more, and 3) block-type residual austenite: 1% or more to ½×occupancy ratio of lath-type residual austenite, and 4) average size of block-type second phase is 10 μm or less.

摘要翻译： 本发明提供一种具有980MPa级抗拉强度以及优异的伸长率，拉伸凸缘性和焊接性的高强度钢板，并且还具有优异的抗延迟分级性能。 高强度钢板包括：C：0.12〜0.25％，Si：1.0〜3.0％，Mn：1.5〜3.0％，P：0.15％以下，S：0.02％以下，Al：0.4％ 并且包含由铁和不可避免的杂质制成的残余物，其中Si和C（Si / C）的含量比以质量比计在7至14的范围内，并且纵向截面中的微观结构 包括基于整体结构的占空比，1）贝氏体铁素体：50％以上，2）板条残余奥氏体：3％以上，3）块状残余奥氏体：1％以上〜1 / ×板条残留奥氏体的占有率，4）块状第二相的平均尺寸为10μm以下。

公开(公告)号：US20100221138A1

公开(公告)日：2010-09-02

申请号：US12303566

申请日：2007-06-04

申请人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

发明人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

IPC分类号： C22C38/28 ,  C22C38/06 ,  C22C38/18 ,  C22C38/02 ,  C22C38/04 ,  C22C38/00

CPC分类号： C22C38/04 ,  C21D9/46 ,  C22C38/02

摘要： The present invention provides a high-strength composite steel sheet which has a tensile strength of 980 MPa class as well as excellent and excellent anti-delayed fraction property, and also has excellent spot-weldability. The high-strength composite steel sheet comprises a steel satisfying: C: 0.10 to 0.25% (% by mass in case of a chemical component, the same shall apply hereinafter), Si: 1.0 to 3.0%, Mn: 1.5 to 3.0%, P: 0.15% or less, S: 0.02% or less, Al: 0.4% or less, and comprising the remnant made from iron and unavoidable impurities; the contents of Si, Al, Mn and Cr satisfy the relationship of “(Si+Al)/Mn or (Si+Al)/(Mn+Cr)=0.74 to 1.26”; and microstructure is specified.

摘要翻译： 本发明提供一种拉伸强度为980MPa等级，优异的抗延迟分级特性，且具有优异的点焊性的高强度复合钢板。 高强度复合钢板包括满足以下条件的钢：C：0.10〜0.25％（化学成分的情况下的质量％，以下相同），Si：1.0〜3.0％，Mn：1.5〜3.0％ P：0.15％以下，S：0.02％以下，Al：0.4％以下，由铁和不可避免的杂质构成的残留物; Si，Al，Mn和Cr的含量满足“（Si + Al）/ Mn或（Si + Al）/（Mn + Cr）= 0.74〜1.26”的关系。 并指定微结构。

公开(公告)号：US20100172786A1

公开(公告)日：2010-07-08

申请号：US12303634

申请日：2007-06-04

申请人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

发明人： Michiharu Nakaya ,  Yoichi Mukai ,  Koichi Sugimoto

IPC分类号： C22C38/04 ,  C22C38/06 ,  C22C38/22

CPC分类号： C22C38/02 ,  C21D9/46 ,  C22C38/04

摘要： The present invention provides a high-strength steel sheet which has a 980 MPa class tensile strength as well as has excellent elongation, stretch flangeability and weldability, and also has excellent anti-delayed fraction property. The high-strength steel sheet comprises steel satisfying: C: 0.12 to 0.25%, Si: 1.0 to 3.0%, Mn: 1.5 to 3.0%, P: 0.15% or less, S: 0.02% or less, Al: 0.4% or less, and comprising the remnant made from iron and unavoidable impurities, wherein a ratio of the contents of Si and C (Si/C) is within the range from 7 to 14 in terms of a mass ratio, and a microstructure in a longitudinal section comprises, by an occupancy ratio based on the entire structure, 1) bainitic ferrite: 50% or more, 2) lath-type residual austenite: 3% or more, and 3) block-type residual austenite: 1% or more to ½×occupancy ratio of lath-type residual austenite, and 4) average size of block-type second phase is 10 μm or less.

摘要翻译： 本发明提供一种具有980MPa级抗拉强度以及优异的伸长率，拉伸凸缘性和焊接性的高强度钢板，并且还具有优异的抗延迟分级性能。 高强度钢板包括：C：0.12〜0.25％，Si：1.0〜3.0％，Mn：1.5〜3.0％，P：0.15％以下，S：0.02％以下，Al：0.4％ 并且包含由铁和不可避免的杂质制成的残余物，其中Si和C（Si / C）的含量比以质量比计在7至14的范围内，并且纵向截面中的微观结构 包括基于整体结构的占空比，1）贝氏体铁素体：50％以上，2）板条残余奥氏体：3％以上，3）块状残余奥氏体：1％以上〜1 / ×板条残留奥氏体的占有率，4）块状第二相的平均尺寸为10μm以下。

公开(公告)号：US20120132327A1

公开(公告)日：2012-05-31

申请号：US13375132

申请日：2010-05-28

申请人： Yoichi Mukai ,  Kouji Kasuya ,  Michiharu Nakaya ,  Michitaka Tsunezawa ,  Fumio Yuse ,  Junichiro Kinugasa ,  Sandra Traint ,  Andreas Pichler

发明人： Yoichi Mukai ,  Kouji Kasuya ,  Michiharu Nakaya ,  Michitaka Tsunezawa ,  Fumio Yuse ,  Junichiro Kinugasa ,  Sandra Traint ,  Andreas Pichler

IPC分类号： C21D6/00 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/00 ,  C22C38/38

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0252 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38

摘要： Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).

摘要翻译： 公开了耐氢脆性优异的高强度钢板。 钢板的拉伸强度为1180MPa以上，满足以下条件：相对于其整个金相组织，贝氏体，贝氏体铁素体和回火马氏体总计占85面积％以上。 残余奥氏体占1面积％以上; 新鲜马氏体占5面积％以下（含0面积％）。

公开(公告)号：US09464337B2

公开(公告)日：2016-10-11

申请号：US13375132

申请日：2010-05-28

申请人： Yoichi Mukai ,  Kouji Kasuya ,  Michiharu Nakaya ,  Michitaka Tsunezawa ,  Fumio Yuse ,  Junichiro Kinugasa ,  Sandra Traint ,  Andreas Pichler

发明人： Yoichi Mukai ,  Kouji Kasuya ,  Michiharu Nakaya ,  Michitaka Tsunezawa ,  Fumio Yuse ,  Junichiro Kinugasa ,  Sandra Traint ,  Andreas Pichler

IPC分类号： C21D6/00 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/00 ,  C22C38/38 ,  C21D9/46 ,  C21D8/02 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0252 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38

摘要： Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).

摘要翻译： 公开了耐氢脆性优异的高强度钢板。 钢板的拉伸强度为1180MPa以上，满足以下条件：相对于其整个金相组织，贝氏体，贝氏体铁素体和回火马氏体总计占85面积％以上。 残余奥氏体占1面积％以上; 新鲜马氏体占5面积％以下（含0面积％）。

公开(公告)号：US20090014095A1

公开(公告)日：2009-01-15

申请号：US12162878

申请日：2007-03-29

申请人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

发明人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

IPC分类号： C22C38/00 ,  B32B3/00

CPC分类号： C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12993

摘要： The invention provides a high strength cold rolled steel sheet having excellent chemical conversion treatment property stably even Mo is added aiming high strengthening. The surface property of the cold rolled steel sheet satisfies that the characteristic of 10 μm or more of the maximum depth (Ry) of the unevenness and 30 μm or less of the average spacing (Sm) of the unevenness, and that either one or more preferably both of, the characteristic of the load length ratio (tp40) of the unevenness of the surface is 20% or less, and the characteristic of the difference of the load length ratios (tp60) and (tp40) is 60% or more, is satisfied, and the crack of 3 μm or less width and 5 μm or more depth does not exist on the surface.

摘要翻译： 本发明提供了一种具有优异的化学转化处理性能的高强度冷轧钢板，即使添加Mo以达到高强度。 冷轧钢板的表面特性满足不平坦部的最大深度（Ry）为10μm以上，凹凸的平均间隔（Sm）为30μm以下的特性，以及任一个或多个 优选地，表面的不平坦度的负载长度比（tp40）的特性都为20％以下，负载长度比（tp60）和（tp40）的差的特性为60％以上， 满意，表面上不存在3μm以下的宽度和5μm以上的深度的裂纹。

公开(公告)号：US07371294B2

公开(公告)日：2008-05-13

申请号：US11045309

申请日：2005-01-31

申请人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

发明人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

IPC分类号： C22C38/22 ,  C22C38/12

CPC分类号： C22C38/22 ,  C22C38/02 ,  C22C38/38

摘要： A high-strength cold-rolled steel sheet is disclosed that comprises a steel including C: 0.05 to 0.13 mass %, Si: 0.5 to 2.5 mass %, and Mn: 0.5 to 3.5 mass %, as well as Mo: 0.05 to 0.6 mass % and/or Cr: 0.05 to 1.0 mass %. The steel sheet is of composite structure of a ferrite+a second phase wherein the second phase has an area rate of 30 to 70% and is combined approximately in a shape of a network; a circle-equivalent average ferrite grain size is not more than 10 μm; and a circle-equivalent diameter of ferrite grain aggregate that exists continuously in an area surrounded by the second phase is not more than 3 times of the average ferrite grain size. The steel sheet has a high-strength and satisfies a balance of elongation and stretch flange formability (ratio of hole expansion) at a higher level.

摘要翻译： 公开了一种高强度冷轧钢板，其包括C：0.05〜0.13质量％，Si：0.5〜2.5质量％，Mn：0.5〜3.5质量％，Mo：0.05〜0.6质量％ ％和/或Cr：0.05〜1.0质量％。 所述钢板为铁素体+第二相的复合结构，其中第二相的面积率为30〜70％，大致为网状; 圆当量平均铁素体晶粒尺寸不大于10um; 并且在由第二相包围的区域中连续存在的铁素体晶粒集合体的圆当量直径不大于平均铁素体晶粒尺寸的3倍。 钢板具有高强度，并且在较高水平上满足伸长率和拉伸凸缘成形性（孔膨胀比）的平衡。

公开(公告)号：US20090053096A1

公开(公告)日：2009-02-26

申请号：US11908616

申请日：2006-03-23

申请人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

发明人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

IPC分类号： C22C38/02 ,  C22C38/06

CPC分类号： C22C38/02 ,  C21D8/0468 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

摘要： A cold rolled steel sheet satisfying on the basis of percent by mass the chemical composition of 0.06-0.6% C, 0.1-2% Si, 0.01-3% Al, 1-4% Si+Al, 1-6% Mn, Si/Mn≦0.40, in which there exists 10 or more pieces/100 μm2 of Mn—Si composite oxide having Mn—Si atom ratio (Mn/Si) of 0.5 or over and major axis of from 0.01 μm to 5 μm and also having a covering ratio of 10% or below at which the surface of the steel sheet is covered with oxide containing Si as the main component.

摘要翻译： 冷轧钢板以化学组成为0.06-0.6％C，0.1-2％Si，0.01-3％Al，1-4％Si + Al，1-6％Mn，Si 其中存在Mn-Si原子比（Mn / Si）为0.5以上且长轴为0.01μm〜5μm的Mn-Si复合氧化物的10个以上/100μm2以上的/Mn<=0.40 覆盖率为10％以下的钢板的表面覆盖有以Si为主要成分的氧化物。

公开(公告)号：US20050167007A1

公开(公告)日：2005-08-04

申请号：US11045309

申请日：2005-01-31

申请人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

发明人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

IPC分类号： C21D9/46 ,  C22C38/00 ,  C22C38/18 ,  C22C38/38

CPC分类号： C22C38/22 ,  C22C38/02 ,  C22C38/38

摘要： A high-strength cold-rolled steel sheet is disclosed that comprises a steel including C: 0.05 to 0.13 mass %, Si: 0.5 to 2.5 mass %, and Mn: 0.5 to 3.5 mass %, as well as Mo: 0.05 to 0.6 mass % and/or Cr: 0.05 to 1.0 mass %. The steel sheet is of composite structure of a ferrite+a second phase wherein the second phase has an area rate of 30 to 70% and is combined approximately in a shape of a network; a circle-equivalent average ferrite grain size is not more than 10 μm; and a circle-equivalent diameter of ferrite grain aggregate that exists continuously in an area surrounded by the second phase is not more than 3 times of the average ferrite grain size. The steel sheet has a high-strength and satisfies a balance of elongation and stretch flange formability (ratio of hole expansion) at a higher level.

摘要翻译： 公开了一种高强度冷轧钢板，其包括C：0.05〜0.13质量％，Si：0.5〜2.5质量％，Mn：0.5〜3.5质量％，Mo：0.05〜0.6质量％ ％和/或Cr：0.05〜1.0质量％。 所述钢板为铁素体+第二相的复合结构，其中第二相的面积率为30〜70％，大致为网状; 圆当量平均铁素体晶粒尺寸不大于10um; 并且在由第二相包围的区域中连续存在的铁素体晶粒集合体的圆当量直径不大于平均铁素体晶粒尺寸的3倍。 钢板具有高强度，并且在较高水平上满足伸长率和拉伸凸缘成形性（孔膨胀比）的平衡。

公开(公告)号：US06280538B1

公开(公告)日：2001-08-28

申请号：US09438374

申请日：1999-11-12

申请人： Tetsuo Soshiroda ,  Yoichi Mukai ,  Michiharu Nakaya

发明人： Tetsuo Soshiroda ,  Yoichi Mukai ,  Michiharu Nakaya

IPC分类号： C22C3802

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/06 ,  Y02P10/212

摘要： A hot rolled high strength steel sheet having a satisfactory strength-elongation balance and an stretch frangibility and with excellent formability comprising a steel, which contains: C :0.05 ˜ 0.15% Si :0.5 ˜ 2.0% Mn :0.5 ˜ 2.0% P :0.05% or less S :0.010% or less Al :0.005 ˜ less than 0.10%, and the balance of Fe and inevitable impurities, and in which the metal structure mainly comprises three phases of ferrite, retained austenite and bainite, the amount of the ferrite [V(F)] is 60˜95 area %, the amount of the retained austenite [V(&ggr;)] is 3˜15 vol %, the amount of the bainite [V(B)] in the area ratio is 1.5 times or more of the amount of the retained austenite [V(&ggr;)], and the average hardness of the bainite is 240-400 Hv.

摘要翻译： 一种具有令人满意的强度 - 伸长率平衡和拉伸脆性并且具有优异的可成形性的热轧高强度钢板，其包含：余量的Fe和不可避免的杂质，其中金属结构主要包括三相铁素体 ，残留奥氏体和贝氏体，铁素体[V（F）]的含量为60〜95面积％，残留奥氏体[V（γ）]的量为3〜15体积％，贝氏体[V （B）]的面积比为残留奥氏体量[V（γ）]的1.5倍以上，贝氏体的平均硬度为240〜400Hv。