公开(公告)号：US20140056754A1

公开(公告)日：2014-02-27

申请号：US14113771

申请日：2012-06-08

Applicant: Junya Naitou ,  Toshio Murakami ,  Shushi Ikeda ,  Keisuke Okita

Inventor： Junya Naitou ,  Toshio Murakami ,  Shushi Ikeda ,  Keisuke Okita

IPC: B21D22/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/32 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/00 ,  C22C38/20

CPC classification number: B21D22/022 ,  B21D22/208 ,  B21D37/16 ,  C21D1/18 ,  C21D1/20 ,  C21D1/673 ,  C21D6/00 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0426 ,  C21D8/0436 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32

Abstract: There is provided a hot press-formed product, including a thin steel sheet formed by a hot press-forming method, and having a metallic structure that contains bainitic ferrite at 70% to 97% by area, martensite at 27% by area or lower, and retained austenite at 3% to 20% by area, the remainder structure of which is at 5% by area or lower, whereby balance between strength and elongation can be controlled in a proper range and high ductility can be achieved.

Abstract translation: 提供了一种热压成型产品，其包括通过热压成型方法形成的薄钢板，并且具有包含面积为70％至97％的贝氏体铁素体的金属结构，面积为27％的马氏体 ，残留奥氏体为3％〜20％的面积，其余结构为5面积％以下，能够将强度和伸长率之间的平衡控制在适当的范围内，可以实现高的延展性。

公开(公告)号：US20140056753A1

公开(公告)日：2014-02-27

申请号：US14113761

申请日：2012-06-08

Applicant: Junya Naitou ,  Toshio Murakami ,  Shushi Ikeda ,  Keisuke Okita

Inventor： Junya Naitou ,  Toshio Murakami ,  Shushi Ikeda ,  Keisuke Okita

IPC: B21D22/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/32 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/00 ,  C22C38/12

CPC classification number: B21D22/022 ,  B21D22/22 ,  B21D37/16 ,  C21D1/673 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32

Abstract: There is provided a hot press-formed product, including a steel sheet formed by a hot press-forming method, and having a metallic structure that contains ferrite at 30% to 80% by area, bainitic ferrite at lower than 30% by area (not including 0% by area), martensite at 30% by area or lower (not including 0% by area), and retained austenite at 3% to 20% by area, whereby balance between strength and elongation can be controlled in a proper range and high ductility can be achieved.

Abstract translation: 提供了一种热压成型产品，其包括通过热压成型方法形成的钢板，并且具有包含30％至80％面积的铁素体的金属结构，低于30％的面积的贝氏体铁素体 不包括0％面积），30％以下的马氏体（不包括0％面积），残留奥氏体为3〜20％的面积，能够将强度与伸长率的平衡控制在适当的范围内 并且可以实现高延展性。

公开(公告)号：US08597439B2

公开(公告)日：2013-12-03

申请号：US12640229

申请日：2009-12-17

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

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

IPC: C22C38/12

CPC classification number: C22C38/02 ,  C22C38/04 ,  C22C38/12

Abstract: 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).

Abstract translation: 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：US20060169366A1

公开(公告)日：2006-08-03

申请号：US11340472

申请日：2006-01-27

Applicant: Fumio Yuse ,  Kenji Saito ,  Shushi Ikeda ,  Koichi Sugimoto

Inventor： Fumio Yuse ,  Kenji Saito ,  Shushi Ikeda ,  Koichi Sugimoto

IPC: C22C38/00

CPC classification number: C22C38/02 ,  C21D6/005 ,  C21D6/008 ,  C21D2211/002 ,  C22C38/04

Abstract: The present invention provides a high strength bolt that has excellent hydrogen embrittlement resistance. The high strength bolt having excellent hydrogen embrittlement resistance which bolt comprises 0.20 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, higher than 0% and not higher than 1.5% of Al, 0.15% or less P, 0.02% or less S, and balance of iron and inevitable impurities, and the structure includes: 1% or more residual austenite; 80% or more in total content of bainitic ferrite and martensite; and 10% or less (may be 0%) in total content of ferrite and pearlite in the proportion of area to the entire structure, and also the mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher and the bolt has tensile strength of 1180 MPa or higher.

Abstract translation: 本发明提供耐氢脆性优异的高强度螺栓。 具有优异的耐氢脆性的高强度螺栓包括C：0.20〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，Al：1.5％以上，0.15％以下 P，0.02％以下S，余量为铁和不可避免的杂质，其结构包括：1％以上残余奥氏体; 贝氏体铁素体和马氏体总含量为80％以上; 和铁素体和珠光体的总含量相对于整个结构的面积的比例为10％以下（可以为0％），残余奥氏体晶粒的平均轴比（长轴/短轴）为5以上 螺栓的拉伸强度为1180MPa以上。

公开(公告)号：US06306527B1

公开(公告)日：2001-10-23

申请号：US09685096

申请日：2000-10-11

Applicant: Shushi Ikeda ,  Koichi Makii ,  Yosuke Shindo ,  Shunichi Hashimoto ,  Takahiro Kashima ,  Hiroshi Akamizu ,  Masahiro Nomura

Inventor： Shushi Ikeda ,  Koichi Makii ,  Yosuke Shindo ,  Shunichi Hashimoto ,  Takahiro Kashima ,  Hiroshi Akamizu ,  Masahiro Nomura

IPC: B32B1518

CPC classification number: C23C2/40 ,  C21D1/185 ,  C21D8/0273 ,  C21D2211/005 ,  C21D2211/008 ,  C23C2/02 ,  Y10S428/939 ,  Y10T428/12799

Abstract: A hot-dip galvanized steel sheet which is produced from a cold-rolled steel sheet, as a base steel sheet, consisting essentially of C: 0.010-0.06 wt %, Si: no more than 0.5 wt %, Mn: no less than 0.5 wt % and less than 2.0 wt %, P: no more than 0.20 wt %, S: no more than 0.01 wt %, Al: 0.005-0.10 wt %, N: no more than 0.005 wt %, Cr: no more than 1.0 wt %, Mn+1.3Cr: 1.9-2.3 wt %, Fe: remainder, and having a structure composed of ferrite and a second phase containing martensite, said second phase in the structure accounting for no more than 20% in terms of area and martensite in the second phase accounting for no less than 50%, and which has a zinc-plated layer formed on the surface thereof by hot-dip galvanizing or hot-dip galvannealing. A process for production of said hot-dip galvanized steel sheet. This steel sheet has a composite structure containing martensite and yet it has a low strength (no higher than 500 MPa) and also has good strength-ductility balance.

Abstract translation: 一种由冷轧钢板作为基本钢板制成的热浸镀锌钢板，其基本上由C：0.010-0.06重量％，Si：不大于0.5重量％，Mn：不小于0.5 重量％且小于2.0重量％，P：不大于0.20重量％，S：不大于0.01重量％，Al：0.005-0.10重量％，N：不大于0.005重量％，Cr：不大于1.0 重量％，Mn + 1.3Cr：1.9-2.3重量％，Fe：余量，并且具有由铁素体构成的结构和含有马氏体的第二相，所述结构中的所述第二相占面积不大于20％ 第二相中的马氏体不低于50％，并且通过热浸镀锌或热浸镀锌合金在其表面形成有镀锌层。 一种生产所述热浸镀锌钢板的方法。 该钢板具有包含马氏体的复合结构，但其强度低（不高于500MPa），并且还具有良好的强度 - 延展性平衡。

公开(公告)号：US07833363B2

公开(公告)日：2010-11-16

申请号：US11874516

申请日：2007-10-18

Applicant: Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu ,  Yoichi Mukai ,  Koh-ichi Sugimoto

Inventor： Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu ,  Yoichi Mukai ,  Koh-ichi Sugimoto

IPC: C21D8/00

CPC classification number: C22C38/02 ,  C21D7/13 ,  C21D8/005 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

Abstract: A high-strength forged part is disclosed which comprises a base phase structure, comprising 30% or more of ferrite in terms of a space factor, and a second phase structure, comprising bainite and/or martensite, and retained austenite having an average gain diameter of 5 μm or less and a content represented by 50X[C]

Abstract translation: 公开了一种高强度锻造部件，其包括基本相结构，其包含基于空间因子的铁素体的30％以上，以及包含贝氏体和/或马氏体的第二相结构和具有平均增益直径的残余奥氏体 为50×[C] <[VγR] <150×[C]表示的含量，[VγR]表示残留奥氏体的空间因子（γR），[C]表示C的质量％ 锻造部分。 此外，公开了一种高强度锻造部件，其包括基本相结构，其包含基于空间因子的回火贝氏体或回火马氏体的50％以上，以及包含马氏体和3％至30％保留的第二相结构 奥氏体以空间因子计，其中纵横比为2以下的残留奥氏体和马氏体的部分在空间因子方面为25％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

Applicant: Shushi Ikeda ,  Hiroshi Akamizu ,  Koichi Makii ,  Yoichi Mukai ,  Koichi Sugimoto

Inventor： Shushi Ikeda ,  Hiroshi Akamizu ,  Koichi Makii ,  Yoichi Mukai ,  Koichi Sugimoto

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

CPC classification number: C21D9/52 ,  C21D1/20 ,  C21D8/0273 ,  C21D2211/001 ,  C21D2211/002

Abstract: 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.

Abstract translation: 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

Applicant: Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

Inventor： Hiroshi Akamizu ,  Yoichi Mukai ,  Shushi Ikeda ,  Koichi Sugimoto

IPC: C22C38/04

CPC classification number: C22C38/04 ,  C21D8/0236 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/02

Abstract: 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.

Abstract translation: 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：US20080092996A1

公开(公告)日：2008-04-24

申请号：US11874516

申请日：2007-10-18

Applicant: Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu ,  Yoichi Mukai ,  Koh-ichi Sugimoto

Inventor： Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu ,  Yoichi Mukai ,  Koh-ichi Sugimoto

IPC: C21D8/00 ,  C22C38/00

CPC classification number: C22C38/02 ,  C21D7/13 ,  C21D8/005 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

Abstract: A high-strength forged part is disclosed which comprises a base phase structure, comprising 30% or more of ferrite in terms of a space factor, and a second phase structure, comprising bainite and/or martensite, and retained austenite having an average grain diameter of 5 μm or less and a content represented by 50X[C]

Abstract translation: 公开了一种高强度锻造部件，其包括基本相结构，其包含基于空间因子的铁素体的30％以上，以及包含贝氏体和/或马氏体的第二相结构，以及具有平均粒径的残留奥氏体 为5μm以下，由50X [C] <[VγR<150×[C]表示的含量表示为 残留奥氏体（γR）和[C]表示锻造部分中C的质量％。 此外，公开了一种高强度锻造部件，其包括基本相结构，其包含基于空间因子的回火贝氏体或回火马氏体的50％以上，以及包含马氏体和3％至30％保留的第二相结构 奥氏体以空间因子计，其中纵横比为2以下的残留奥氏体和马氏体的部分在空间因子方面为25％以下。

公开(公告)号：US09194015B2

公开(公告)日：2015-11-24

申请号：US12477299

申请日：2009-06-03

Applicant: Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu

Inventor： Shushi Ikeda ,  Koichi Makii ,  Hiroshi Akamizu

IPC: C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D1/20 ,  C21D8/04 ,  C22C38/12

CPC classification number: C21D1/20 ,  C21D8/02 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

Abstract: A dual phase steel sheet with good bake-hardening properties is provided. The steel sheet is characterized in containing (in terms of percent by mass) C: no less than 0.06% and less than 0.25%; Si+Al: 0.5 to 3%; Mn: 0.5 to 3%; P: no more than 0.15%; and S: no more than 0.02%; and also meeting the following condition (in terms of space factor) that retained austenite is at least 3%, bainite is at least 30%, and ferrite is no more than 50%, and further characterized in differing in stress larger than 50 MPa before and after application of 2% pre-strain and ensuing heat treatment for paint baking at 170° C. for 20 minutes. The steel sheet has well-balanced strength and workability, exhibits good bake-hardening properties at the time of paint baking, and offers good resistance to natural aging.

Abstract translation: 提供了具有良好烘烤硬化性能的双相钢板。 钢板的特征在于含有（以质量％计）C：不小于0.06％且小于0.25％; Si + Al：0.5〜3％ Mn：0.5〜3％ P：不超过0.15％; S：不大于0.02％; 并且还满足以下条件（以空间因子计），残余奥氏体为3％以上，贝氏体为30％以上，铁素体为50％以下，其特征在于应力大于50MPa以下 并在施加2％预应变之后，并在170℃下进行油漆烘烤20分钟。 钢板具有平衡的强度和加工性，在烤漆时具有良好的烘烤硬化性能，并且具有良好的耐自然老化性。