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    High-strength thin steel sheet
    5.
    发明授权
    High-strength thin steel sheet 有权
    高强度薄钢板

    公开(公告)号：US08673093B2

    公开(公告)日：2014-03-18

    申请号：US12513514

    申请日：2007-12-10

    申请人： Muneaki Ikeda ,  Kouji Kasuya ,  Yoichi Mukai ,  Fumio Yuse ,  Junichiro Kinugasa

    发明人： Muneaki Ikeda ,  Kouji Kasuya ,  Yoichi Mukai ,  Fumio Yuse ,  Junichiro Kinugasa

    IPC分类号： C22C38/14 ,  C22C38/02 ,  C22C38/04 ,  C21D9/00

    CPC分类号： C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

    摘要： The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above where Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001),and the thin steel sheet has 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties.

    摘要翻译： 本发明是含有C，Si，Mn，P，S，Al，Mo，Ti，B和N的薄钢板，其中由下述等式计算的值Z为2.0-6.0， 残留奥氏体的结构为1％以上，贝氏体铁素体和马氏体的总和为80％以上，残留奥氏体晶粒的平均轴比为5以上，拉伸强度为980MPa以上，其中，Z = 9 ×[C] + [Mn] + 3×[Mo] + 490×[B] +7×[Mo] / {100×（[B] +0.001）），薄钢板的拉伸强度 并提高耐氢脆性。

    HIGH-STRENGTH THIN STEEL SHEET
    6.
    发明申请
    HIGH-STRENGTH THIN STEEL SHEET 有权
    高强度薄钢板

    公开(公告)号：US20100080728A1

    公开(公告)日：2010-04-01

    申请号：US12513514

    申请日：2007-12-10

    申请人： Muneaki Ikeda ,  Kouji Kasuya ,  Yoichi Mukai ,  Fumio Yuse ,  Junichiro Kinugasa

    发明人： Muneaki Ikeda ,  Kouji Kasuya ,  Yoichi Mukai ,  Fumio Yuse ,  Junichiro Kinugasa

    IPC分类号： C22C38/42 ,  C22C38/16 ,  C22C38/08 ,  C22C38/04 ,  C22C38/18 ,  C22C38/14 ,  B21B1/26

    CPC分类号： C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

    摘要： The present invention is the thin steel sheet containing C, Si, Mn, P, S, Al, Mo, Ti, B, and N wherein a value Z calculated by the equation described below is 2.0-6.0, an area ratio against all the structure is 1% or above for retained austenite and 80% or above for total of bainitic ferrite and martensite, a mean axis ratio of the retained austenite crystal grain is 5 or above, and tensile strength is 980 MPa or above. Value Z=9×[C]+[Mn]+3×[Mo]+490×[B]+7×[Mo]/{100×([B]+0.001)} Thus a high strength thin steel sheet with 980 MPa or above tensile strength and enhanced hydrogen embrittlement resistance properties can be provided. Also, in accordance with the present invention, the hot-rolled steel sheet for cold-rolling capable of manufacturing the high strength thin steel sheet with good productivity and having improved cold-rollability can be provided.

    摘要翻译： 本发明是含有C，Si，Mn，P，S，Al，Mo，Ti，B和N的薄钢板，其中由下述等式计算的值Z为2.0-6.0， 残留奥氏体的结构为1％以上，贝氏体铁素体和马氏体的总和为80％以上，残留奥氏体晶粒的平均轴比为5以上，拉伸强度为980MPa以上。 值Z = 9×[C] + [Mn] + 3×[Mo] + 490×[B] + 7×[Mo] / {100×（[B] +0.001）}因此， 可以提供980MPa以上的拉伸强度和增强的耐氢脆性。 此外，根据本发明，可以提供能够以良好的生产率制造高强度薄钢板并具有改进的冷轧性能的用于冷轧的热轧钢板。

    High strength thin steel sheet having high hydrogen embrittlement resisting property and high workability
    7.
    发明申请
    High strength thin steel sheet having high hydrogen embrittlement resisting property and high workability 审中-公开
    具有高耐氢脆性和高加工性的高强度薄钢板

    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。

    High strength thin steel sheet having high hydrogen embrittlement resisting property
    8.
    发明申请
    High strength thin steel sheet having high hydrogen embrittlement resisting property 审中-公开
    具有高耐氢脆性的高强度薄钢板

    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。

    COLD-ROLLED STEEL SHEET
    9.
    发明申请
    COLD-ROLLED STEEL SHEET 有权
    冷轧钢板

    公开(公告)号：US20120009434A1

    公开(公告)日：2012-01-12

    申请号：US13257639

    申请日：2009-10-01

    申请人： Hideo Hata ,  Toshio Murakami ,  Akira Ibano ,  Fumio Yuse ,  Junichiro Kinugasa

    发明人： Hideo Hata ,  Toshio Murakami ,  Akira Ibano ,  Fumio Yuse ,  Junichiro Kinugasa

    IPC分类号： B21C1/00

    CPC分类号： C21D9/46 ,  C21D6/008 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y10T428/12229

    摘要： Disclosed is a high-strength cold-rolled steel sheet which has improved stretch-flange formability while keeping excellent hydrogen embrittlement resistance. The cold-rolled steel sheet comprises 0.03 to 0.30% by mass of C, 3.0% by mass or less (including 0% by mass) of Si, more than 0.1% by mass and not more than 2.8% by mass of Mn, 0.1% by mass or less of P, 0.005% by mass or less of S, 0.01% by mass or less of N, and 0.01 to 0.50% by mass of Al. The cold-rolled steel sheet additionally comprises V in an amount of 0.001 to 1.00% by mass or one or more elements selected from Nb, Ti and Zr in the total amount of 0.01% by mass or more, with the remainder being made up by iron and unavoidable impurities, wherein the contents of one or more elements selected from Nb, Ti and Zr fulfils the requirement represented by the following formula: [% C]−[% Nb]/92.9×12−[% Ti]/47.9×12−[% Zr]/91.2×12>0.03. In the cold-rolled steel sheet, the area ratio of tempered martensite is 50% or more (including 100%), and ferrite makes up the remainder. In the cold-rolled steel sheet, the distribution of precipitates in the tempered martensite is as follows: the number of precipitates each having a circle-equivalent diameter of 1 to 10 nm is 20 particles or more per 1 μm2 of the tempered martensite and the number of precipitates each containing V or at least one element selected from Nb, Ti and Zr and each having a circle-equivalent diameter of 20 nm or more is 10 particles or less per 1 μm2 of the tempered martensite.

    摘要翻译： 公开了一种在保持优异的耐氢脆性的同时具有改进的拉伸凸缘成形性的高强度冷轧钢板。 该冷轧钢板包含C：0.03〜0.30质量％，Si：3.0质量％以下（含有0质量％）的Si，0.1质量％以上且2.8质量％以下的Mn，0.1 以质量％以下的P，0.005质量％以下的S，0.01质量％以下的N和0.01〜0.50质量％的Al。 冷轧钢板另外包含0.001〜1.00质量％的V或者选自Nb，Ti和Zr中的一种以上的元素，总量为0.01质量％以上，余量由 铁和不可避免的杂质，其中选自Nb，Ti和Zr中的一种或多种元素的含量满足下式所示的要求：[％C] - [％Nb] /92.9×12- [％Ti] /47.9× 12- [％Zr] /91.2×12> 0.03。 在冷轧钢板中，回火马氏体的面积比为50％以上（包括100％），铁素体构成剩余部分。 在冷轧钢板中，回火马氏体中析出物的分布如下：圆形当量直径为1〜10nm的析出物的个数为每1μm2回火马氏体为20个以上， 每个含有V的析出物数量或选自Nb，Ti和Zr中的至少一种元素，每个圆当量直径为20nm以上的析出物的数量为每1μm2的回火马氏体为10个以下。

    Cold-rolled steel sheet
    10.
    发明授权
    Cold-rolled steel sheet 有权
    冷轧钢板

    公开(公告)号：US08876986B2

    公开(公告)日：2014-11-04

    申请号：US13257639

    申请日：2009-10-01

    申请人： Hideo Hata ,  Toshio Murakami ,  Akira Ibano ,  Fumio Yuse ,  Junichiro Kinugasa

    发明人： Hideo Hata ,  Toshio Murakami ,  Akira Ibano ,  Fumio Yuse ,  Junichiro Kinugasa

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

    CPC分类号： C21D9/46 ,  C21D6/008 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y10T428/12229

    摘要： Disclosed is a high-strength cold-rolled steel sheet having improved stretch-flange formability and excellent hydrogen embrittlement resistance. In addition to Fe, C, Si, Mn, P, S, N, and Al, the steel sheet contains V or at least one element of Nb, Ti and Zr. The contents of the at least one element of Nb, Ti and Zr, if present, satisfy the expression of [% C]−[% Nb]/92.9×12−[% Ti]/47.9×12−[% Zr]/91.2×12>0.03. The steel sheet has an area ratio of tempered martensite of 50% or more with ferrite as the remainder. The number of precipitates having a circle-equivalent diameter of 1 to 10 nm is 20 particles or more per 1 μm2 of the tempered martensite. The number of precipitates containing V or the at least one element of Nb, Ti and Zr and having a circle-equivalent diameter of 20 nm or more is 10 particles or less per 1 μm2 of the tempered martensite.

    摘要翻译： 公开了一种具有改善的拉伸凸缘成形性和优异的耐氢脆性的高强度冷轧钢板。 除了Fe，C，Si，Mn，P，S，N和Al之外，钢板含有V或Nb，Ti和Zr中的至少一种元素。 如果存在Nb，Ti和Zr的至少一种元素的含量满足[％C] - [％Nb] /92.9×12 - [％Ti] / 47.9×12 - [％Zr] / 91.2×12> 0.03。 钢板的回火马氏体的面积比为50％以上，其余为铁素体。 圆当量直径为1〜10nm的析出物的数量为每1μm2的回火马氏体为20个以上。 包含V或Nb，Ti和Zr的至少一种元素的圆当量直径为20nm以上的析出物的数量为每1μm2的回火马氏体为10个以下。