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1. 发明授权

US07553380B2 Dual-phase steel sheet excellent in stretch flange formability and production method thereof 有权
标题翻译：拉伸凸缘成形性优异的双相钢板及其制造方法
公开(公告)号：US07553380B2
公开(公告)日：2009-06-30
申请号：US11541748
申请日：2006-10-03
申请人： Shushi Ikeda , Hiroshi Akamizu , Shunichi Hashimoto , Takahiro Kashima , Tatsuya Asai
发明人： Shushi Ikeda , Hiroshi Akamizu , Shunichi Hashimoto , Takahiro Kashima , Tatsuya Asai
IPC分类号： C22C38/04 , C22C38/06 , C21D8/00
CPC分类号： C22C38/38 , C21D1/185 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/04 , C22C38/06
摘要： Disclosed is a dual-phase steel sheet having low yield ratio, excellent in the balance for strength-elongation and for strength-stretch flange formability, and also excellent in bake hardening property containing (on the mass % basis). C: 0.01-0.20%, Si: 0.5% or less, Mn: 0.5-3%, sol.Al: 0.06% or less (inclusive 0%), P: 0.15% or less (exclusive 0%), and S: 0.02% or less (inclusive 0″), and in which the matrix phase contains tempered martensite; tempered martensite and ferrite; tempered bainite; or tempered bainite and ferrite, and the second phase comprises 1 to 30% of martensite at an area ratio based on the entire structure.
摘要翻译：公开了低屈服比，强度伸长率和强度拉伸凸缘成形性的平衡优异的双相钢板，并且含有（以质量％计）的烘烤硬化性也优异。 C：0.01-0.20％，Si：0.5％以下，Mn：0.5〜3％，sol.Al：0.06％以下（含0％），P：0.15％以下（不含0％），S： 0.02％以下（含0“），基质相含有回火马氏体; 回火马氏体和铁素体; 回火贝氏体; 或回火贝氏体和铁素体，并且第二相以基于整个结构的面积比为1〜30％的马氏体。

2. 发明申请

US20070023113A1 Dual-phase steel sheet excellent in stretch flange formability and production method thereof 有权
标题翻译：拉伸凸缘成形性优异的双相钢板及其制造方法
公开(公告)号：US20070023113A1
公开(公告)日：2007-02-01
申请号：US11541748
申请日：2006-10-03
申请人： Shushi Ikeda , Hiroshi Akamizu , Shunichi Hashimoto , Takahiro Kashima , Tatsuya Asai
发明人： Shushi Ikeda , Hiroshi Akamizu , Shunichi Hashimoto , Takahiro Kashima , Tatsuya Asai
IPC分类号： C21D8/00
CPC分类号： C22C38/38 , C21D1/185 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/04 , C22C38/06
摘要： Disclosed is a dual-phase steel sheet having low yield ratio, excellent in the balance for strength-elongation and for strength-stretch flange formability, and also excellent in bake hardening property containing (on the mass % basis). C: 0.01-0.20%, Si: 0.5% or less, Mn: 0.5-3%, sol.Al: 0.06% or less (inclusive 0%), P: 0.15% or less (exclusive 0%), and S: 0.02% or less (inclusive 0″), and in which the matrix phase contains tempered martensite; tempered martensite and ferrite; tempered bainite; or tempered bainite and ferrite, and the second phase comprises 1 to 30% of martensite at an area ratio based on the entire structure.
摘要翻译：公开了低屈服比，强度伸长率和强度拉伸凸缘成形性的平衡优异的双相钢板，并且含有（以质量％计）的烘烤硬化性也优异。 C：0.01-0.20％，Si：0.5％以下，Mn：0.5〜3％，sol.Al：0.06％以下（含0％），P：0.15％以下（不含0％），S： 0.02％以下（含0“），基质相含有回火马氏体; 回火马氏体和铁素体; 回火贝氏体; 或回火贝氏体和铁素体，并且第二相以基于整个结构的面积比为1〜30％的马氏体。

3. 发明授权

US06306527B1 Hot-dip galvanized steel sheet and process for production thereof 有权
标题翻译：热镀锌钢板及其制造方法
公开(公告)号：US06306527B1
公开(公告)日：2001-10-23
申请号：US09685096
申请日：2000-10-11
申请人： Shushi Ikeda , Koichi Makii , Yosuke Shindo , Shunichi Hashimoto , Takahiro Kashima , Hiroshi Akamizu , Masahiro Nomura
发明人： Shushi Ikeda , Koichi Makii , Yosuke Shindo , Shunichi Hashimoto , Takahiro Kashima , Hiroshi Akamizu , Masahiro Nomura
IPC分类号： B32B1518
CPC分类号： C23C2/40 , C21D1/185 , C21D8/0273 , C21D2211/005 , C21D2211/008 , C23C2/02 , Y10S428/939 , Y10T428/12799
摘要： 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.
摘要翻译：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。

4. 发明授权

US07090731B2 High strength steel sheet having excellent formability and method for production thereof 有权
标题翻译：成型性优异的高强度钢板及其制造方法
公开(公告)号：US07090731B2
公开(公告)日：2006-08-15
申请号：US10470752
申请日：2002-01-31
申请人： Takahiro Kashima , Shunichi Hashimoto , Shushi Ikeda , Hiroshi Akamizu , Koh-ichi Sugimoto , Akihiko Nagasaka , Akinobu Kanda , Ryo Kikuchi
发明人： Takahiro Kashima , Shunichi Hashimoto , Shushi Ikeda , Hiroshi Akamizu , Koh-ichi Sugimoto , Akihiko Nagasaka , Akinobu Kanda , Ryo Kikuchi
IPC分类号： C22C38/02 , C22C38/06 , C21D8/02
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/0263 , C21D8/0273 , C21D9/52 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/04 , C23C2/02
摘要： A high strength steel sheet having (2-1) a base phase structure, the base phase structure being tempered martensite or tempered bainite and accounting for 50% or more in terms of a space factor relative to the whole structure, or the base phase structure comprising tempered martensite or tempered bainite which accounts for 15% or more in terms of a space factor relative to the whole structure and further comprising ferrite, the tempered martensite or the tempered bainite having a hardness which satisfies the relation of Vickers hardness (Hv)≧500[C]+30[Si]+3[Mn]+50 where [ ] represents the content (mass %) of each element, and (2-2) a second phase structure comprising retained austenite which accounts for 3 to 30% in terms of a space factor relative to the whole structure and optionally further comprising bainite and/or martensite, the retained austenite having a C concentration (CγR) of 0.8% or more.
摘要翻译：具有（2-1）基相结构的高强度钢板，所述基本相结构为回火马氏体或回火贝氏体，相对于整体结构而言，占空间因子的50％以上，或基体相结构包括回火马氏体或回火贝氏体，相对于整个结构，占空间系数的15％以上，还包含铁素体，回火马氏体或回火贝氏体的硬度满足维氏硬度（Hv）> = 500 [C] +30 [Si] +3 [Mn] +50其中[]表示各元素的含量（质量％），（2-2）包含3〜30的残留奥氏体的第2相结构相对于整个结构的空间系数为％，任选地还包含贝氏体和/或马氏体，C浓度（CgammaR）为0.8％以上的残留奥氏体。

5. 发明授权

US08597439B2 High-strength cold rolled steel sheet having excellent formability, and plated steel sheet 有权
标题翻译：优异的成形性的高强度冷轧钢板，镀钢板
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。

6. 发明申请

US20100092332A1 HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY, AND PLATED STEEL SHEET 有权
标题翻译：高强度冷轧钢板，具有优异的可铸性和镀层钢板
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）。

7. 发明申请

US20050247378A1 High-strength cold rolled steel sheet having excellent formability, and plated steel sheet 审中-公开
标题翻译：优异的成形性的高强度冷轧钢板，镀钢板
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）。

8. 发明授权

US06316127B1 Galvanized steel sheet superior in ductility and process for production thereof 有权
标题翻译：延展性优异的加热冷却钢板及其制造方法
公开(公告)号：US06316127B1
公开(公告)日：2001-11-13
申请号：US09553962
申请日：2000-04-20
申请人： Shushi Ikeda , Koichi Makii , Yosuke Shindo , Shunichi Hashimoto , Takahiro Kashima
发明人： Shushi Ikeda , Koichi Makii , Yosuke Shindo , Shunichi Hashimoto , Takahiro Kashima
IPC分类号： B32B1518
CPC分类号： C21D8/0278 , C21D8/0226 , C21D8/0273 , C22C38/002 , C22C38/004 , C22C38/04 , C22C38/06 , C23C2/02 , C23C2/28 , Y10S428/939 , Y10T428/12799
摘要： A P- and Ti-added galvannealed steel sheet superior in ductility, and a process for production thereof. It is made of a cold-rolled steel sheet and has alloyed hot-dip galvanizing on the surface thereof, said cold-rolled steel sheet having the chemical composition (in terms of wt %) of C: less than 0.010%, Si: no more than 0.5%, Mn: 1.0˜3.0%, P: no more than 0.20%, S: no more than 0.01%, Al: 0.005˜0.10%, N: no more than 0.0050%, Ti/48−(C/12+N/14+S/32): 0.0003˜0.0018 with the remainder being chiefly Fe, and said cold-rolled steel sheet being characterized by &rgr;1≦107 and &rgr;2≦5×105, where &rgr;1 is the number of precipitates whose particle diameter (D) is in the range of 10 nm≦D
摘要翻译：具有优异延性的P型和Ti型合金化热镀锌钢板及其制造方法。由冷轧钢板制成，其表面具有合金化的热浸镀锌，所述冷轧钢板的化学组成（按重量％计）C：小于0.010％，Si：不大于0.5％，Mn：1.0〜3.0％，P：不大于0.20％，S：0.01％以下，Al：0.005〜0.10％，N：不大于0.0050％Ti / 48-（C / 12 + N / 14 + S / 32）：0.0003〜0.0018，余量主要为Fe，所述冷轧钢板的特征在于rho1 <= 107且rho2 = 5×105，其中rho1是其颗粒直径（D）在10nm <= D <100nm的范围内，rho2是其粒径（D）在100nm

9. 发明授权

US06540846B2 High-strength hot-rolled steel sheet superior in stretch-flanging performance and fatigue resistance and method for production thereof 失效
公开(公告)号：US06540846B2
公开(公告)日：2003-04-01
申请号：US09793579
申请日：2001-02-27
申请人： Takahiro Kashima , Shunichi Hashimoto
发明人： Takahiro Kashima , Shunichi Hashimoto
IPC分类号： C22C3812
CPC分类号： C22C38/14 , C21D8/0226 , C21D8/0263 , C22C38/04 , C22C38/06 , C22C38/12
摘要： Disclosed herein is a high-strength hot-rolled steel sheet superior in stretch-flanging properties and fatigue properties which comprises (in mass %) 0.01-0.10% C, less than 2% Si (including 0%), 0.5-2% Mn, less than 0.08% P (including 0%), less than 0.01% S (including 0%), less than 0.01% N (including 0%), 0.01-0.1% Al, and at least one of 0.1-0.5% Ti and less than 0.8% Nb (including 0%), with the granular bainitic structure accounting for more than 80% (by area) in its sectional metallographic structure. Disclosed also herein is a process for producing said steel sheet.

10. 发明授权

US06554918B2 High-strength hot-rolled steel sheet superior in stretch flange formability and method for production thereof 有权
标题翻译：拉伸凸缘成型性优异的高强度热轧钢板及其制造方法
公开(公告)号：US06554918B2
公开(公告)日：2003-04-29
申请号：US09909908
申请日：2001-07-23
申请人： Takahiro Kashima , Shunichi Hashimoto
发明人： Takahiro Kashima , Shunichi Hashimoto
IPC分类号： C22C3800
CPC分类号： C22C38/06 , C21D8/0226 , C22C38/04 , C22C38/14
摘要： A high-strength hot-rolled steel sheet superior in stretch flange formability which comprises C (0.01-0.10 mass %), Si (no more than 1.0 mass %), Mn (no more than 2.5 mass %), P (no more than 0.08 mass %), S (no more than 0.005 mass %), Al (0.015-0.050 mass %), and Ti (0.10-0.30 mass %), with the remainder being substantially Fe, said hot-rolled steel sheet having a structure composed mainly of ferrite in which the unit grain is surrounded by grains such that adjacent grains differ in orientation more than 15°, the unit grain having an average particle diameter (d) no larger than 5 &mgr;m. This steel sheet is produced by the steps of heating, rolling, cooling, and coiling under the following conditions. Heating temperature: 1150-1300° C.; reduction in rolling at 900-840° C.: no less than 70%; cooling rate: no less than 60° C./s; and coiling temperature: 300-500° C. or 600-750° C.
摘要翻译：一种拉伸凸缘成形性优异的高强度热轧钢板，其特征在于，C（0.01-0.10质量％），Si（不大于1.0质量％），Mn（不大于2.5质量％），P（不大于 0.08质量％），S（0.005质量％以下），Al（0.015〜0.050质量％）和Ti（0.10〜0.30质量％），余量基本上为Fe，所述热轧钢板的结构主要由铁素体组成，其中单位晶粒被颗粒包围，使得相邻晶粒的取向大于15°，单位颗粒的平均粒径（d）不大于5μm。该钢板是在以下条件下通过加热，轧制，冷却和卷取的步骤制造的。加热温度：1150-1300℃。在900-840°C的轧制下降：不小于70％; 冷却速度：不低于60℃/ s; 卷取温度：300-500℃或600-750℃

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