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：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：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：US07767036B2

公开(公告)日：2010-08-03

申请号：US11910013

申请日：2006-03-29

申请人： Takahiro Kashima ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Sugimoto

发明人： Takahiro Kashima ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Sugimoto

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B32B15/01

CPC分类号： C22C38/02 ,  C21D6/00 ,  C21D6/002 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0447 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  Y10T428/12799

摘要： A high-strength cold-rolled steel sheet exhibiting an excellent strength-workability balance, including in percent by mass: 0.10-0.25% of C; 1.0-2.0% of Si; 1.5-3.0% of Mn; 0.01% or less (not including 0%) of P; 0.005% or less (not including 0%) of S; 0.01-3.0% of Al; and remaining part consisting of iron and inevitable impurities, wherein the space factor of bainitic ferrite to the entire structure is 70% or more, the space factor of residual austenite to the entire structure is 5-20%, the hardness (HV) is 270 or greater, and the half-value width of an X-ray diffraction peak on a (200)-surface of α-iron is 0.220 degrees or smaller.

摘要翻译： 表现出优异的强度加工性平衡的高强度冷轧钢板，包括质量百分比：0.10-0.25％的C; 1.0-2.0％的Si; 1.5-3.0％的Mn; 0.01％以下（不含0％）P; 0.005％以下（不含0％）S; 0.01-3.0％的Al; 剩余部分由铁和不可避免的杂质组成，其中贝氏体铁素体对整个结构的空间因子为70％以上，残余奥氏体相对于整个结构的空间因子为5-20％，硬度（HV）为270 以上，α铁的（200）面的X射线衍射峰的半值宽度为0.220度以下。

公开(公告)号：US07591977B2

公开(公告)日：2009-09-22

申请号：US11044185

申请日：2005-01-28

申请人： Shushi Ikeda ,  Hiroshi Akamizu ,  Koichi Makii ,  Yoichi Mukai ,  Koichi Sugimoto

发明人： Shushi Ikeda ,  Hiroshi Akamizu ,  Koichi Makii ,  Yoichi Mukai ,  Koichi Sugimoto

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

CPC分类号： C21D9/52 ,  C21D1/20 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/002

摘要： To provide a high strength and low yield ratio cold rolled steel sheet having high elongation property and high flange drawing property, or a plated steel sheet made by plating the same. The high strength and low yield ratio cold rolled steel sheet or the plated steel sheet made by plating the same has such a constitution as 0.10 to 0.25% of C, 1.0 to 2.0% of Si and 1.5 to 3.0% of Mn, are contained in terms of weight percentage, while other elements are controlled such as Al within 0.2%, P within 0.15% and S within 0.02%, with residual austenite occupying at least 5%, bainitic ferrite occupying at least 60% (preferably 80% or more), and polygonal ferrite within 20% (containing 0%), so that a tensile strength is 980 MPa or higher, while an elongation (El in %), a flange drawing property (λin %), a tensile strength (TS in MPa) and a yield strength (YP in MPa) satisfy the following inequality (1): [(El ×λ×TS)/YP]≧645.

摘要翻译： 为了提供具有高伸长率和高法兰拉拔性能的高强度和低屈服比的冷轧钢板，或通过电镀其制成的镀覆钢板。 高强度低屈服比的冷轧钢板或通过电镀钢板制成的镀覆钢板具有C：0.10〜0.25％，Si：1.0〜2.0％，Mn：1.5〜3.0％ 贝氏体铁素体占据至少60％（优选为80％以上）的贝氏体铁素体，而其他元素则控制在Al的0.2％以内，P在0.15％以内，S在0.02％以内，残留奥氏体占5％ ，多边形铁素体为20％以下（含有0％），拉伸强度为980MPa以上，伸长率（El％），凸缘拉伸性能（兰德因数％），拉伸强度（MPa） 屈服强度（YP，MPa）满足以下不等式（1）：[（El×lambdaxTS）/ YP]> = 645。

公开(公告)号：US20080251160A1

公开(公告)日：2008-10-16

申请号：US11910029

申请日：2006-03-28

申请人： Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

发明人： Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

IPC分类号： C22C38/04

CPC分类号： C22C38/04 ,  C21D8/0236 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/02

摘要： A high-strength cold-rolled steel sheet excellent in uniform elongation, including in percent by mass: 0.10-0.28% of C; 1.0-2.0% of Si; and 1.0-3.0% of Mn, and the structures of the same having the space factors below to the entire structure: 30-65% of bainitic ferrite; 30-50% of polygonal ferrite; and 5-20% of residual austenite.

摘要翻译： 均匀伸长率优异的高强度冷轧钢板，以质量％计：0.10〜0.28％ 1.0-2.0％的Si; 和1.0-3.0％的Mn，并且具有以下空间因子的结构相对于整个结构：贝氏体铁素体的30-65％ 30-50％的多边形铁素体; 和5-20％的残留奥氏体。

公开(公告)号：US09074272B2

公开(公告)日：2015-07-07

申请号：US11910029

申请日：2006-03-28

申请人： Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

发明人： Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

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

CPC分类号： C22C38/04 ,  C21D8/0236 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/02

摘要： A high-strength cold-rolled steel sheet excellent in uniform elongation, including in percent by mass: 0.10-0.28% of C; 1.0-2.0% of Si; and 1.0-3.0% of Mn, and the structures of the same having the space factors below to the entire structure: 30-65% of bainitic ferrite; 30-50% of polygonal ferrite; and 5-20% of residual austenite.

摘要翻译： 均匀伸长率优异的高强度冷轧钢板，以质量％计：0.10〜0.28％ 1.0-2.0％的Si; 和1.0-3.0％的Mn，其结构相对于整个结构的空间因子低：贝氏体铁素体的30-65％; 30-50％的多边形铁素体; 和5-20％的残余奥氏体。

公开(公告)号：US20090238713A1

公开(公告)日：2009-09-24

申请号：US12159400

申请日：2006-12-28

申请人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

发明人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

IPC分类号： C22C38/00 ,  C22C38/42 ,  C22C38/22 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/04

CPC分类号： C21D9/48 ,  C21D1/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50

摘要： The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 μm or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 μm or less.

摘要翻译： 本发明涉及耐氢脆性优异的超高强度薄钢板，该钢板以重量％计，C：0.10〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，Mn：0.15％ 以下的P，0.02％以下的S，1.5％以下的Al，0.003〜2.0％的Cr，余量包括铁和不可避免的杂质; 其中残余奥氏体的晶粒的平均轴比（长轴/短轴）为5以上，残留奥氏体的平均短轴长度为1μm以下，残留奥氏体的晶粒为 1个或更少的颗粒之间的最邻近距离。

公开(公告)号：US07887648B2

公开(公告)日：2011-02-15

申请号：US12159400

申请日：2006-12-28

申请人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

发明人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

IPC分类号： C22C38/32 ,  C22C38/28

CPC分类号： C21D9/48 ,  C21D1/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50

摘要： The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 μm or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 μm or less.

摘要翻译： 本发明涉及耐氢脆性优异的超高强度薄钢板，该钢板以重量％计，C：0.10〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，Mn：0.15％ 以下的P，0.02％以下的S，1.5％以下的Al，0.003〜2.0％的Cr，余量包括铁和不可避免的杂质; 其中残余奥氏体的晶粒的平均轴比（长轴/短轴）为5以上，残留奥氏体的平均短轴长度为1μm以下，残留奥氏体的晶粒为 颗粒之间的最近邻距离为1μm以下。

公开(公告)号：US20060137769A1

公开(公告)日：2006-06-29

申请号：US11317181

申请日：2005-12-27

申请人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

发明人： Fumio Yuse ,  Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Junichiro Kinugasa ,  Kenji Saito ,  Koichi Sugimoto ,  Tomohiko Hojo

IPC分类号： C22C38/06

CPC分类号： C22C38/02 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： The present invention provides a high strength thin steel sheet that has high hydrogen embrittlement resisting property and high workability. The high strength thin steel sheet having high hydrogen embrittlement resisting property has a metallurgical structure after stretch forming process to elongate 3% comprises: (i) 1% or more residual austenite; 80% or more in total of bainitic ferrite and martensite; and 9% or less (may be 0%) in total of ferrite and pearlite in terms of proportion of area to the entire structure, wherein the mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher, or (ii) 1% or more residual austenite in terms of proportion of area to the entire structure; mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher; mean length of minor axes of the residual austenite grains is 1 μm or less; minimum distance between the residual austenite grains is 1 μm or less; and the steel has tensile strength of 1180 MPa or higher.

摘要翻译： 本发明提供耐氢脆性高，加工性高的高强度薄钢板。 具有高耐氢脆性能的高强度薄钢板在拉伸成形过程之后具有冶金结构以延长3％，包括：（i）1％或更多的残余奥氏体; 总共为贝氏体铁素体和马氏体的80％以上; 以与面积相对于整个结构的面积的比例计算的铁素体和珠光体的总和为9％以下（可以为0％），其中残余奥氏体晶粒的平均轴比（长轴/短轴）为5以上， 或（ii）以面积与整个结构的比例计算的1％或更多的残余奥氏体; 残余奥氏体晶粒的平均轴比（长轴/短轴）为5以上; 残余奥氏体晶粒的短轴的平均长度为1μm以下; 残余奥氏体晶粒之间的最小距离为1um或更小; 钢的拉伸强度为1180MPa以上。