公开(公告)号：US20140178712A1

公开(公告)日：2014-06-26

申请号：US14236371

申请日：2012-08-08

申请人： Naoki Maruyama ,  Naoki Yoshinaga ,  Masafumi Azuma ,  Yasuharu Sakuma ,  Atsushi Itami

发明人： Naoki Maruyama ,  Naoki Yoshinaga ,  Masafumi Azuma ,  Yasuharu Sakuma ,  Atsushi Itami

IPC分类号： C22C38/50 ,  C22C38/48 ,  C22C38/42 ,  C22C38/16 ,  C22C38/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/14

CPC分类号： C22C38/50 ,  C21D8/0263 ,  C21D8/0426 ,  C21D8/0473 ,  C21D8/0484 ,  C21D9/56 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/48 ,  C23C2/02 ,  Y10T428/12972

摘要： Hot rolled steel sheet which has a maximum tensile strength of 600 MPa or more and has an excellent low temperature impact energy absorption and HAZ softening resistance and a method of production of the same are provided, that is, sheet which contains, by mass %, C: 0.04 to 0.09%, Si: 0.4% or less, Mn: 1.2 to 2.0%, P: 0.1% or less, S: 0.02% or less, Al: 1.0% or less, Nb: 0.02 to 0.09%, Ti: 0.02 to 0.07%, and N: 0.005% or less, where 2.0≦Mn+8[% Ti]+12[% Nb]≦2.6, has a balance of Fe and unavoidable impurities, has an area percentage of pearlite of 5% or less, has a total area percentage of martensite and retained austenite of 0.5% or less, has a balance of a metal structure of ferrite and/or bainite, has an average grain size of ferrite and bainite of 10 μm or less, has an average particle size of alloy carbonitrides with incoherent interfaces which contain Ti and Nb of 20 nm or less, and has a yield ratio of 0.85 or more.

摘要翻译： 具有最大抗张强度为600MPa以上且具有优异的低温冲击能量吸收和HAZ耐软化性的热轧钢板及其制造方法，即以质量％计， C：0.04〜0.09％，Si：0.4％以下，Mn：1.2〜2.0％，P：0.1％以下，S：0.02％以下，Al：1.0％以下，Nb：0.02〜0.09％，Ti ：0.02〜0.07％，N：0.005％以下，其中2.0＆nlE; Mn + 8 [％Ti] +12 [％Nb]＆nlE; 2.6，其余为Fe和不可避免的杂质，具有珠光体的面积百分比 为5％以下，具有0.5％以下的马氏体和残留奥氏体的总面积百分比，铁素体和/或贝氏体的金属结构的平衡，铁素体和贝氏体的平均粒径为10μm以下 具有包含Ti和Nb为20nm以下的非相干界面的合金碳氮化物的平均粒径，并且屈服比为0.85以上。

公开(公告)号：US08657970B2

公开(公告)日：2014-02-25

申请号：US12934039

申请日：2008-11-12

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

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

IPC分类号： C22C38/00 ,  C22C38/08 ,  C21D8/02 ,  C22C38/14

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： 该热轧钢板以质量％计含有C：0.015％以上且小于0.040％ Si：小于0.05％; Mn：0.9％以上至1.8％以下; P：小于0.02％; S：小于0.01％; Al：小于0.1％; N：小于0.006％; 和Ti：0.05％以上至小于0.11％，其余为Fe和不可避免的杂质，其中Ti / C在2.5以上且小于3.5的范围内，Nb，Zr，V，Cr，Mo，B 并不包括W，微结构包括多数铁素体和准多边形铁素体的混合微结构，其比例大于96％，最大拉伸强度为520MPa以上且低于720MPa，老化指数AI更多 超过15MPa时，孔膨胀率（λ）％和总伸长率（E1）％的乘积为2350以上，疲劳极限为200MPa以上。

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：US20110017360A1

公开(公告)日：2011-01-27

申请号：US12934039

申请日：2008-11-12

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

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

IPC分类号： C21D8/02 ,  C22C38/00 ,  B32B15/01 ,  C22C38/02 ,  C22C38/04

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 (A) % and a total elongation (El) % is 2350 or more, and a fatigue limit is 200 MPa or more.

摘要翻译： 该热轧钢板以质量％计含有C：0.015％以上且小于0.040％ Si：小于0.05％; Mn：0.9％以上至1.8％以下; P：小于0.02％; S：小于0.01％; Al：小于0.1％; N：小于0.006％; 和Ti：0.05％以上至小于0.11％，其余为Fe和不可避免的杂质，其中Ti / C在2.5以上且小于3.5的范围内，Nb，Zr，V，Cr，Mo，B 并不包括W，微结构包括多数铁素体和准多边形铁素体的混合微结构，其比例大于96％，最大拉伸强度为520MPa以上且低于720MPa，老化指数AI更多 孔膨胀率（A）％和总伸长率（E1）％的乘积为15MPa以上，疲劳极限为200MPa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：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：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：US08084143B2

公开(公告)日：2011-12-27

申请号：US10574053

申请日：2004-09-30

申请人： Naoki Yoshinaga ,  Shunji Hiwatashi ,  Yasuharu Sakuma ,  Atsushi Itami

发明人： Naoki Yoshinaga ,  Shunji Hiwatashi ,  Yasuharu Sakuma ,  Atsushi Itami

IPC分类号： C22C38/12 ,  C22C38/14

CPC分类号： C22C38/02 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/04 ,  C22C38/12 ,  C23C2/02 ,  C23C2/26 ,  Y10T428/12799

摘要： High yield ratio high-strength thin steel sheet superior in weldability and ductility characterized by: being comprised of steel containing, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously satisfying 1.1 ≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised or iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×E11/2 of 3320 or more, an YR×TS×EL1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.

摘要翻译： 优异的可焊性和延展性的高屈服比高强度薄钢板，其特征在于：由以质量％计含有C：0.030以上且小于0.10％Si：0.30〜0.80％，Mn：1.7〜3.2％ ，P：0.001〜0.02％，S：0.0001〜0.006％，Al：0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55 ％，B：0.0005〜0.0040％，同时满足1.1＆nlE; 14×Ti（％）+ 20×Nb（％）+ 3×Mo（％）+ 300×B（％）＆nlE; 3.7， 铁和不可避免的杂质，其屈服比为0.64〜小于0.92，TS×E11 / 2为3320以上，YR×TS×EL1 / 2为2320以上，最大拉伸强度（TS）为 780MPa以上。

公开(公告)号：US20070029015A1

公开(公告)日：2007-02-08

申请号：US10574053

申请日：2004-09-30

申请人： Naoki Yoshinaga ,  Shunji Hiwatashi ,  Yasuharu Sakuma ,  Atsushi Itami

发明人： Naoki Yoshinaga ,  Shunji Hiwatashi ,  Yasuharu Sakuma ,  Atsushi Itami

IPC分类号： C22C38/00 ,  C23C2/06

CPC分类号： C22C38/02 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/04 ,  C22C38/12 ,  C23C2/02 ,  C23C2/26 ,  Y10T428/12799

摘要： High yield ratio high-strength thin steel sheet D superior in weldability and ductility characterized by; being comprised of steel containing, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0,02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further c Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously statisfying 1.1≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised of iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×El of 3320 or more, an YR×TS×El1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.

摘要翻译： 高屈服比高强度薄钢板D具有优异的焊接性和延展性，其特征在于： 由以质量％计含有C：0.030〜小于0.10％，Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜0.02％，S：0.0001〜0.006％的钢， Al：0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55％，B：0.0005〜0.0040％ = 14xTi（％）+ 20xNb（％）+ 3xMo（％）+ 300xB（％）<= 3.7，余量由铁和不可避免的杂质组成，屈服比为0.64至小于0.92，TSxE1为3320或 更优选为2320以上的YRxTSxE1 / 2/2，最大拉伸强度（TS）为780MPa以上。