公开(公告)号：US08163108B2

公开(公告)日：2012-04-24

申请号：US12736154

申请日：2009-03-26

申请人： Masafumi Azuma ,  Naoki Yoshinaga ,  Naoki Maruyama ,  Noriyuki Suzuki ,  Yasuharu Sakuma

发明人： Masafumi Azuma ,  Naoki Yoshinaga ,  Naoki Maruyama ,  Noriyuki Suzuki ,  Yasuharu Sakuma

IPC分类号： C22C38/00 ,  C22C38/18 ,  C22C38/04 ,  C22C38/14

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： 该冷轧钢板以质量％计含有C：0.05％以上0.095％以下的Cr：0.15％以上2.0％以下，B：0.0003％以上， 0.01％以下，Si：0.3％以上2.0％以下，Mn：1.7％以上2.6％以下，Ti：0.005％以上0.14％以下，P： 不大于0.03％，S：不大于0.01％，Al：不大于0.1％，N：小于0.005％，O：不小于0.0005％，不大于0.005％，其余为铁 和不可避免的杂质，其中钢板的组织主要包括晶粒尺寸不大于4μm的多边形铁素体，贝氏体和马氏体的硬质组织，马氏体的块尺寸不大于0.9μm，Cr 马氏体内的含量为多边形铁素体中的Cr含量的1.1〜1.5倍，拉伸强度为880MPa以上。

公开(公告)号：US20110008647A1

公开(公告)日：2011-01-13

申请号：US12736154

申请日：2009-03-26

申请人： Masafumi Azuma ,  Naoki Yoshinaga ,  Naoki Maruyama ,  Noriyuki Suzuki ,  Yasuharu Sakuma

发明人： Masafumi Azuma ,  Naoki Yoshinaga ,  Naoki Maruyama ,  Noriyuki Suzuki ,  Yasuharu Sakuma

IPC分类号： B32B15/18 ,  C21D8/02 ,  C25D7/00 ,  C23C2/02 ,  C22C38/18 ,  C22C38/40 ,  C22C38/20 ,  C22C38/22

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： 该冷轧钢板以质量％计含有C：0.05％以上0.095％以下的Cr：0.15％以上2.0％以下，B：0.0003％以上， 0.01％以下，Si：0.3％以上2.0％以下，Mn：1.7％以上2.6％以下，Ti：0.005％以上0.14％以下，P： 不大于0.03％，S：不大于0.01％，Al：不大于0.1％，N：小于0.005％，O：不小于0.0005％，不大于0.005％，其余为铁 和不可避免的杂质，其中钢板的组织主要包括晶粒尺寸不大于4μm的多边形铁素体，贝氏体和马氏体的硬质组织，马氏体的块尺寸不大于0.9μm，Cr 马氏体内的含量为多边形铁素体中的Cr含量的1.1〜1.5倍，拉伸强度为880MPa以上。

公开(公告)号：US20120222781A1

公开(公告)日：2012-09-06

申请号：US13508779

申请日：2010-11-30

申请人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Akinobu Murasato ,  Yasuharu Sakuma ,  Hiroyuki Kawata ,  Chisato Wakabayashi

发明人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Akinobu Murasato ,  Yasuharu Sakuma ,  Hiroyuki Kawata ,  Chisato Wakabayashi

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

CPC分类号： C23C2/06 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  C23C2/40 ,  C25D5/36

摘要： High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a) by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×108 (particles/mm3) or more.

摘要翻译： 具有900MPa以上的极限拉伸强度的高强度钢板，其耐氢脆性优异，其特征在于，在钢板的结构中，（a）以体积分数计，铁素体的含量为10〜50％，贝氏体 铁素体和/或贝氏体为10〜60％，回火马氏体为10〜50％，（b）含有Si或Si和Al为0.1％以上的铁基碳化物存在于4×10 8（粒子/ mm 3 ） 或者更多。

公开(公告)号：US10023947B2

公开(公告)日：2018-07-17

申请号：US13508779

申请日：2010-11-30

申请人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Akinobu Murasato ,  Yasuharu Sakuma ,  Hiroyuki Kawata ,  Chisato Wakabayashi

发明人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Akinobu Murasato ,  Yasuharu Sakuma ,  Hiroyuki Kawata ,  Chisato Wakabayashi

IPC分类号： C21D8/00 ,  C22C38/04 ,  C22C38/02 ,  C23C2/06 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C23C2/28 ,  C25D5/36 ,  C23C2/40

摘要： High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a) by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×108 (particles/mm3) or more.

公开(公告)号：US08460481B2

公开(公告)日：2013-06-11

申请号：US12736417

申请日：2009-04-09

申请人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

发明人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

IPC分类号： C22C38/02 ,  C22C38/04 ,  C21D8/04 ,  C23C2/06

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： 本发明旨在提供在汽车，建筑材料，家用电器等中的应用，具有优异的成型性能如扩孔性和延展性以及耐疲劳性的高强度片材，其特征在于，在特定内容中表达 以质量％计，C，Si，Mn，P，S，Al，N和O以及铁和不可避免的杂质的平衡，并且具有主要由铁素体和硬质结构组成的钢板结构，一些铁素体相邻的晶体取向差异 硬结构和硬结构小于9°，最大拉伸强度为540MPa或更大。

公开(公告)号：US08070889B2

公开(公告)日：2011-12-06

申请号：US12736417

申请日：2009-04-09

申请人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

发明人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

IPC分类号： C22C38/02 ,  C22C38/04 ,  C21D8/04 ,  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.

公开(公告)号：US20110024004A1

公开(公告)日：2011-02-03

申请号：US12736417

申请日：2009-04-09

申请人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

发明人： Masafumi Azuma ,  Noriyuki Suzuki ,  Naoki Maruyama ,  Naoki Yoshinaga ,  Akinobu Murasato

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/18 ,  C22C38/16 ,  C22C38/08

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： 本发明旨在提供在汽车，建筑材料，家用电器等中的应用，具有优异的成型性能如扩孔性和延展性以及耐疲劳性的高强度片材，其特征在于，在特定内容中表达 以质量％计，C，Si，Mn，P，S，Al，N和O以及铁和不可避免的杂质的平衡，并且具有主要由铁素体和硬质结构组成的钢板结构，一些铁素体相邻的晶体取向差异 硬结构和硬结构小于9°，最大拉伸强度为540MPa或更大。

公开(公告)号：US20120141829A1

公开(公告)日：2012-06-07

申请号：US13390493

申请日：2010-08-30

申请人： Hatsuhiko Oikawa ,  Hideki Hamatani ,  Masafumi Azuma ,  Noriyuki Suzuki ,  Fuminori Watanabe ,  Naoki Maruyama ,  Hiroyuki Kawata

发明人： Hatsuhiko Oikawa ,  Hideki Hamatani ,  Masafumi Azuma ,  Noriyuki Suzuki ,  Fuminori Watanabe ,  Naoki Maruyama ,  Hiroyuki Kawata

IPC分类号： B32B15/01 ,  B23K11/16

CPC分类号： B23K11/115 ,  B23K11/16 ,  B23K11/166 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B32B15/011 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12347 ,  Y10T428/12965

摘要： Provided is a spot welded joint (10) which includes at least one thin steel plate with a tensile strength of 750 MPa to 1850 MPa and a carbon equivalent Ceq of equal to or more than 0.22 mass % to 0.55 mass % and in which a nugget (3) is formed in an interface of the thin steel plates (1A, 1B). In a nugget outer layer zone, a microstructure consists of a dendrite structure in which an average value of arm intervals is equal to or less than 12 μm, an average grain diameter of carbides contained in the microstructure is 5 nm to 100 nm, and a number density of carbides is equal to or more than 2×106/mm2.

摘要翻译： 提供了一种点焊接头（10），其包括至少一个拉伸强度为750MPa至1850MPa的薄钢板和等于或大于0.22质量％至0.55质量％的碳当量Ceq，并且其中熔核 （3）形成在薄钢板（1A，1B）的界面中。 在熔核外层区域中，微观组织由臂间隔的平均值等于或小于12μm的枝晶结构构成，微观结构中所含的碳化物的平均粒径为5nm〜100nm， 碳化物的数密度等于或大于2×10 6 / mm 2。

公开(公告)号：US08962149B2

公开(公告)日：2015-02-24

申请号：US13390493

申请日：2010-08-30

申请人： Hatsuhiko Oikawa ,  Hideki Hamatani ,  Masafumi Azuma ,  Noriyuki Suzuki ,  Fuminori Watanabe ,  Naoki Maruyama ,  Hiroyuki Kawata

发明人： Hatsuhiko Oikawa ,  Hideki Hamatani ,  Masafumi Azuma ,  Noriyuki Suzuki ,  Fuminori Watanabe ,  Naoki Maruyama ,  Hiroyuki Kawata

IPC分类号： B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  B23K11/11 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B23K11/16

CPC分类号： B23K11/115 ,  B23K11/16 ,  B23K11/166 ,  B23K2101/18 ,  B23K2101/34 ,  B23K2103/04 ,  B32B15/011 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12347 ,  Y10T428/12965

摘要： Provided is a spot welded joint (10) which includes at least one thin steel plate with a tensile strength of 750 MPa to 1850 MPa and a carbon equivalent Ceq of equal to or more than 0.22 mass % to 0.55 mass % and in which a nugget (3) is formed in an interface of the thin steel plates (1A, 1B). In a nugget outer layer zone, a microstructure consists of a dendrite structure in which an average value of arm intervals is equal to or less than 12 μm, an average grain diameter of carbides contained in the microstructure is 5 nm to 100 nm, and a number density of carbides is equal to or more than 2×106/mm2.

摘要翻译： 提供了一种点焊接头（10），其包括至少一个拉伸强度为750MPa至1850MPa的薄钢板和等于或大于0.22质量％至0.55质量％的碳当量Ceq，并且其中熔核 （3）形成在薄钢板（1A，1B）的界面中。 在熔核外层区域中，微观组织由臂间隔的平均值等于或小于12μm的枝晶结构构成，微观结构中所含的碳化物的平均粒径为5nm〜100nm， 碳化物的数密度等于或大于2×10 6 / mm 2。

公开(公告)号：US20130167980A1

公开(公告)日：2013-07-04

申请号：US13822746

申请日：2011-09-16

申请人： Hiroyuki Kawata ,  Naoki Maruyama ,  Akinobu Murasato ,  Naoki Yoshinaga ,  Chisato Wakabayashi ,  Noriyuki Suzuki

发明人： Hiroyuki Kawata ,  Naoki Maruyama ,  Akinobu Murasato ,  Naoki Yoshinaga ,  Chisato Wakabayashi ,  Noriyuki Suzuki

IPC分类号： C21D8/02 ,  C22C38/40 ,  C22C38/38 ,  C22C38/34 ,  C22C38/16 ,  C22C38/00 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/58 ,  C22C38/14

CPC分类号： C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C25D3/22 ,  C25D3/565 ,  C25D5/36 ,  C25D5/50

摘要： This high-strength steel sheet includes by mass percentage: 0.05 to 0.4% of C; 0.1 to 2.5% of Si; 1.0 to 3.5% of Mn; 0.001 to 0.03% of P; 0.0001 to 0.01% of S; 0.001 to 2.5% of Al; 0.0001 to 0.01% of N; 0.0001 to 0.008% of O; and a remainder composed of iron and inevitable impurities, wherein a steel sheet structure contains by volume fraction 10 to 50% of a ferrite phase, 10 to 50% of a tempered martensite phase, and a remaining hard phase, wherein a 98% hardness is 1.5 or more times as high as a 2% hardness in a range from ⅛ to ⅜ of a thickness of the steel sheet, wherein a kurtosis K* of the hardness distribution between the 2% hardness and the 98% hardness is −1.2 to −0.4, and wherein an average crystal grain size in the steel sheet structure is 10 μm or less.

摘要翻译： 该高强度钢板以质量百分比计：C：0.05〜0.4％ 0.1〜2.5％的Si; 1.0〜3.5％的Mn; 0.001〜0.03％P; 0.0001〜0.01％的S; 0.001〜2.5％的Al; 0.0001〜0.01％N; 0.0001〜0.008％的O; 余量由铁和不可避免的杂质组成，其中钢板结构体积体积分数为铁素体相10-50％，回火马氏体相为10-50％，剩余硬质相为98％ 在钢板厚度的1/8至3/8的范围内的2％硬度的1.5倍或更多倍，其中2％硬度和98％硬度之间的硬度分布的峰度K *为 -1.2〜-0.4，钢板结构体的平均结晶粒径为10μm以下。