公开(公告)号：US08597439B2

公开(公告)日：2013-12-03

申请号：US12640229

申请日：2009-12-17

申请人： Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

发明人： Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

IPC分类号： C22C38/12

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/12

摘要： A high-strength cold rolled steel sheet contains:0.10 to 0.28% of C,1.0 to 2.0% of Si,1.0 to 3.0% of Mn, and0.03 to 0.10% of Nb in terms of % by mass,Al is controlled to 0.5 or less, P is controlled to 0.15% or less, and S is controlled to 0.02% or less, and residual austenite accounts for 5 to 20%, bainitic ferrite accounts for 50% or more, and polygonal ferrite accounts for 30% or less (containing 0%), of the entire structure, and a mean number of residual austenite blocks is 20 or more as determined when the random area (15 μm×15 μm) is observed by EBSP (electron back scatter diffraction pattern).

摘要翻译： 高强度冷轧钢板包含：以质量％计，C：0.10〜0.28％，Si：1.0〜2.0％，Mn：1.0〜3.0％，Nb：0.03〜0.10％，Al： 以下，P为0.15％以下，S为0.02％以下，残留奥氏体为5〜20％，贝氏体铁素体为50％以上，多边形铁素体为30％以下 （含有0％），并且当通过EBSP（电子背散射衍射图）观察到随机面积（15mum×15mum））时，残留奥氏体块的平均数为20以上。

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：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：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。

公开(公告)号：US20060130937A1

公开(公告)日：2006-06-22

申请号：US11290640

申请日：2005-12-01

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

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

IPC分类号： C22C38/00

CPC分类号： C21D8/02 ,  C21D9/46 ,  C22C1/06 ,  C22C38/02 ,  C22C38/04

摘要： The present invention provide a TRIP-type composite structure steel plate of the TPF steel type in which elongation and stretch flange formability at room temperature are improved by controlling the morphology of the second-phase structure. In a composite structure sheet steel comprising 0.02 to 0.12% C, 0.5 to 2.0% Si+Al and 1.0 to 2.0% Mn, with the remainder being Fe and unavoidable impurities, and comprising 80% or more polygonal ferrite (steel structure space factor) and 1 to 7% retained austenite, with the remainder being bainite and/or martensite, wherein the elongation and stretch flange formability of the composite sheet steel are improved by reducing the number of bulky, massive second phases with an aspect ratio of 1:3 or less and a mean grain size of 0.5 μm or more in the second phase of this composite structure, which comprises retained austenite and martensite.

摘要翻译： 本发明提供一种TPF钢型的TRIP型复合结构钢板，通过控制第二相结构的形态，提高室温下的伸长率和拉伸凸缘成形性。 在包含0.02至0.12％的C，0.5至2.0％的Si + Al和1.0至2.0％Mn的复合结构钢板中，其余为Fe和不可避免的杂质，并且包含80％或更多的多边形铁素体（钢结构空间系数） 和1〜7％的残余奥氏体，其余为贝氏体和/或马氏体，其中复合片材钢的伸长率和拉伸凸缘成形性通过减少长宽比为1:3的体积大的质量第二相的数量而得到改善 该复合结构的第二相中的平均粒径为0.5μm以上，其包含残留奥氏体和马氏体。

公开(公告)号：US20100092332A1

公开(公告)日：2010-04-15

申请号：US12640229

申请日：2009-12-17

申请人： Shushi IKEDA ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

发明人： Shushi IKEDA ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

IPC分类号： C22C38/04 ,  C22C38/12 ,  C22C38/02

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/12

摘要： To provide a high-strength cold rolled steel sheet that has well-balanced tensile strength and elongation as well as well-balanced tensile strength and stretch-flangeability, and a plated steel sheet manufactured by plating the steel sheet.The high-strength cold rolled steel sheet contains: 0.10 to 0.28% of C, 1.0 to 2.0% of Si, 1.0 to 3.0% of Mn, and 0.03 to 0.10% of Nb in terms of % by mass, wherein the content of Al is controlled to 0.5 or less, the content of P is controlled to 0.15% or less, and the content of S is controlled to 0.02% or less, and wherein residual austenite accounts for 5 to 20%, bainitic ferrite accounts for 50% or more, and polygonal ferrite accounts for 30% or less (containing 0%), of the entire structure, and wherein a mean number of residual austenite blocks is 20 or more as determined when the random area (15 μm×15 μm) is observed by EBSP (electron back scatter diffraction pattern).

摘要翻译： 提供具有良好的拉伸强度和伸长率以及平衡的拉伸强度和拉伸凸缘性的高强度冷轧钢板，以及通过电镀钢板而制成的镀覆钢板。 高强度冷轧钢板含有：以质量％计，C：0.10〜0.28％，Si：1.0〜2.0％，Mn：1.0〜3.0％，Nb：0.03〜0.10％ 控制在0.5以下，P的含量控制在0.15％以下，S的含量控制在0.02％以下，残留奥氏体占5〜20％，贝氏体铁素体占50％， 更多的是多边形铁素体占整个结构的30％以下（含有0％），并且其中当观察到随机区域（15μm×15μm）时确定的残余奥氏体块的平均数为20以上 通过EBSP（电子背散射衍射图）。

公开(公告)号：US07413617B2

公开(公告)日：2008-08-19

申请号：US11290640

申请日：2005-12-01

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

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

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

CPC分类号： C21D8/02 ,  C21D9/46 ,  C22C1/06 ,  C22C38/02 ,  C22C38/04

摘要： The present invention provide a TRIP-type composite structure steel plate of the TPF steel type in which elongation and stretch flange formability at room temperature are improved by controlling the morphology of the second-phase structure. In a composite structure sheet steel comprising 0.02 to 0.12% C, 0.5 to 2.0% Si+Al and 1.0 to 2.0% Mn, with the remainder being Fe and unavoidable impurities, and comprising 80% or more polygonal ferrite (steel structure space factor) and 1 to 7% retained austenite, with the remainder being bainite and/or martensite, wherein the elongation and stretch flange formability of the composite sheet steel are improved by reducing the number of bulky, massive second phases with an aspect ratio of 1:3 or less and a mean grain size of 0.5 μm or more in the second phase of this composite structure, which comprises retained austenite and martensite.

摘要翻译： 本发明提供一种TPF钢型的TRIP型复合结构钢板，通过控制第二相结构的形态，提高室温下的伸长率和拉伸凸缘成形性。 在包含0.02至0.12％的C，0.5至2.0％的Si + Al和1.0至2.0％Mn的复合结构钢板中，其余为Fe和不可避免的杂质，并且包含80％或更多的多边形铁素体（钢结构空间系数） 和1〜7％的残余奥氏体，其余为贝氏体和/或马氏体，其中复合片材钢的伸长率和拉伸凸缘成形性通过减少长宽比为1:3的体积大的质量第二相的数量而得到改善 该复合结构的第二相中的平均粒径为0.5μm以上，其包含残留奥氏体和马氏体。

公开(公告)号：US20060137768A1

公开(公告)日：2006-06-29

申请号：US11317174

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 ,  C22C38/16

摘要： The purpose of the present invention is to provide a high strength thin steel sheet that has high hydrogen embrittlement resisting property. In order to achieve the above purpose, a high strength thin steel sheet having high hydrogen embrittlement resisting property comprises: C: 0.10 to 0.25%; Si: 1.0 to 3.0%; Mn: 1.0 to 3.5%; P: 0.15% or less; S: 0.02% or less; and Al: 1.5% or less (higher than 0%) in terms of percentage by weight, with balance of iron and inevitable impurities; and the metal structure comprises: residual austenite; 1% by area or more in proportion to the entire structure; bainitic ferrite and martensite: 80% or more in total; and ferrite and pearlite: 9% or less (may be 0%) in total, while the mean axis ratio (major axis/minor axis) of said residual austenite grains is 5 or higher, and the steel has tensile strength of 1180 MPa or higher.

摘要翻译： 本发明的目的是提供一种具有高耐氢脆性的高强度薄钢板。 为了实现上述目的，具有高耐氢脆性的高强度薄钢板包括：C：0.10〜0.25％ Si：1.0〜3.0％ Mn：1.0〜3.5％ P：0.15％以下; S：0.02％以下; 和Al：1.5重量％以下（高于0重量％），余量为铁和不可避免的杂质; 并且金属结构包括：残余奥氏体; 1％以上，占整个结构的比例; 贝氏体铁素体和马氏体总计为80％以上; 铁素体和珠光体的总和为9％以下（可以为0％），而残留奥氏体晶粒的平均轴比（长轴/短轴）为5以上，钢的拉伸强度为1180MPa， 更高。

公开(公告)号：US20050247378A1

公开(公告)日：2005-11-10

申请号：US11110716

申请日：2005-04-21

申请人： Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

发明人： Shushi Ikeda ,  Yoichi Mukai ,  Hiroshi Akamizu ,  Koichi Makii ,  Koichi Sugimoto ,  Shunichi Hashimoto ,  Kenji Saito

IPC分类号： C21D8/02 ,  C22C38/12

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/12

摘要： To provide a high-strength cold rolled steel sheet that has well-balanced tensile strength and elongation as well as well-balanced tensile strength and stretch-flangeability, and a plated steel sheet manufactured by plating the steel sheet. The high-strength cold rolled steel sheet contains: 0.10 to 0.28% of C, 1.0 to 2.0% of Si, 1.0 to 3.0% of Mn, and 0.03 to 0.10% of Nb in terms of % by mass, wherein the content of Al is controlled to 0.5 or less, the content of P is controlled to 0.15% or less, and the content of S is controlled to 0.02% or less, and wherein residual austenite accounts for 5 to 20%, bainitic ferrite accounts for 50% or more, and polygonal ferrite accounts for 30% or less (containing 0%), of the entire structure, and wherein a mean number of residual austenite blocks is 20 or more as determined when the random area (15 μm×15 μμm) is observed by EBSP (electron back scatter diffraction pattern).

摘要翻译： 提供具有良好的拉伸强度和伸长率以及平衡的拉伸强度和拉伸凸缘性的高强度冷轧钢板，以及通过电镀钢板而制成的镀覆钢板。 高强度冷轧钢板含有：以质量％计，C：0.10〜0.28％，Si：1.0〜2.0％，Mn：1.0〜3.0％，Nb：0.03〜0.10％ 控制在0.5以下，P的含量控制在0.15％以下，S的含量控制在0.02％以下，残留奥氏体占5〜20％，贝氏体铁素体占50％， 更多的是多边形铁素体占整个结构的30％以下（含有0％），其中当通过EBSP观察到随机面积（15mumx15mumum）时，残留奥氏体块的平均数为20以上 （电子背散射衍射图）。