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31. 发明授权

US07413617B2 Composite structure sheet steel with excellent elongation and stretch flange formability 有权
标题翻译：复合结构钢板具有优异的伸长率和拉伸凸缘成形性
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。

32. 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）。

33. 发明申请

US20050161134A1 High strength and low yield ratio cold rolled steel sheet and method of manufacturing the same 有权
标题翻译：高强度低屈服比的冷轧钢板及其制造方法
公开(公告)号：US20050161134A1
公开(公告)日：2005-07-28
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： C21D1/20 , C21D8/02 , C21D9/52 , C21D8/00
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 (λ in %), 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0％），拉伸强度为980MPa以上，拉伸强度（El％），凸缘拉伸性（拉伸％），拉伸强度）和屈服强度（YP，MPa）满足以下不等式（1）：[（ElxlambDaxTS）/ YP]> = 645。

34. 发明申请

US20050150580A1 Ultra-high strength steel sheet having excellent hydrogen embrittlement resistance, and method for manufacturing the same 审中-公开
标题翻译：耐氢脆性优异的超高强度钢板及其制造方法
公开(公告)号：US20050150580A1
公开(公告)日：2005-07-14
申请号：US11030100
申请日：2005-01-07
申请人： Hiroshi Akamizu , Shushi Ikeda , Koichi Makii , Yoichi Mukai , Koichi Sugimoto
发明人： Hiroshi Akamizu , Shushi Ikeda , Koichi Makii , Yoichi Mukai , Koichi Sugimoto
IPC分类号： C21D1/20 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06
CPC分类号： C22C38/04 , C21D1/20 , C21D8/0247 , C21D8/0278 , C21D2211/002 , C21D2211/005 , C22C38/02 , C22C38/06
摘要： The present invention provides an ultra-high strength steel sheet having excellent hydrogen embrittlement resistance, which includes: 0.06 to 0.6% of C; 0.5 to 3% of Si+Al; 0.5 to 3% of Mn; 0.15% or lower of P; and 0.02% or lower of S in terms of mass percentage, and also includes 3% or higher of residual austenite structure, 30% or higher of bainitic ferrite structure, and preferably 50% or lower of polygonal ferrite in terms of an areal ratio to the entire structure, wherein a mean grain size of bainite blocks is smaller than 20 μm as determined by comparing observations of the same region of the bainitic ferrite structure by EBSP (electron back scatter diffraction pattern) and SEM.
摘要翻译：本发明提供耐氢脆性优异的超高强度钢板，其特征在于：C：0.06〜0.6％ 0.5〜3％的Si + Al; 0.5〜3％的Mn; 0.15％以下; 和0.02％以下的S，并且还包括3％以上的残留奥氏体组织，30％以上的贝氏体铁素体结构，优选为50％以下的多边形铁素体，其面积比与通过比较通过EBSP（电子背散射衍射图案）和SEM的贝氏体铁素体结构的相同区域的观测确定的贝氏体块的平均晶粒尺寸小于20μm的整个结构。

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