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1. 发明授权

US08449988B2 High-strength cold-rolled steel sheet excellent in bending workability 有权
标题翻译：弯曲加工性优异的高强度冷轧钢板
公开(公告)号：US08449988B2
公开(公告)日：2013-05-28
申请号：US13099616
申请日：2011-05-03
申请人： Atsuhiro Shiraki , Sae Hamamoto , Yukihiro Utsumi , Tetsuji Hoshika , Yuichi Futamura
发明人： Atsuhiro Shiraki , Sae Hamamoto , Yukihiro Utsumi , Tetsuji Hoshika , Yuichi Futamura
IPC分类号： B32B15/01 , B32B15/04 , B32B15/18
CPC分类号： C22C38/02 , C22C38/001 , C22C38/04 , C22C38/06 , Y10T428/12493 , Y10T428/12799 , Y10T428/12972 , Y10T428/2495
摘要： A cold-rolled steel sheet has a chemical composition of C: 0.12% to 0.3%, Si: 0.5% or less, Mn: less than 1.5%, Al: 0.15% or less, N: 0.01% or less, P: 0.02% or less, and S: 0.01% or less, with the remainder including iron and inevitable impurities and has a martensite single-phase structure as its steel microstructure. In a surface region of the steel sheet from the surface to a depth one-tenth the gauge, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, where the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 100 μm or more. The steel sheet is a high-strength cold-rolled steel sheet which has a sufficiently minimized rate of bending fracture starting from inclusions and thereby has excellent bending workability.
摘要翻译：冷轧钢板的化学成分为C：0.12〜0.3％，Si：0.5％以下，Mn：小于1.5％，Al：0.15％以下，N：0.01％以下，P：0.02 ％以下，S：0.01％以下，余量包括铁和不可避免的杂质，并具有马氏体单相结构作为其钢微观结构。从表面到表面的十分之一的钢板的表面区域，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中夹杂物组的两个最外层颗粒的最外表面之间的轧制方向的距离为100μm以上。钢板是从夹杂物开始的弯曲断裂率足够的最小化的弯曲加工性优异的高强度冷轧钢板。

2. 发明申请

US20110287280A1 HIGH-STRENGTH COLD-ROLLED STEEL SHEET EXCELLENT IN BENDING WORKABILITY 有权
标题翻译：高强度冷轧钢板优良的弯曲工作性能
公开(公告)号：US20110287280A1
公开(公告)日：2011-11-24
申请号：US13099616
申请日：2011-05-03
申请人： Atsuhiro SHIRAKI , Sae Hamamoto , Yukihiro Utsumi , Tetsuji Hoshika , Yuichi Futamura
发明人： Atsuhiro SHIRAKI , Sae Hamamoto , Yukihiro Utsumi , Tetsuji Hoshika , Yuichi Futamura
IPC分类号： B32B15/00 , C22C38/42 , C22C38/16 , C22C38/00 , C22C38/18 , C22C38/08 , C22C38/12 , C22C38/20 , C22C38/06
CPC分类号： C22C38/02 , C22C38/001 , C22C38/04 , C22C38/06 , Y10T428/12493 , Y10T428/12799 , Y10T428/12972 , Y10T428/2495
摘要： A cold-rolled steel sheet has a chemical composition of C: 0.12% to 0.3%, Si: 0.5% or less, Mn: less than 1.5%, Al: 0.15% or less, N: 0.01% or less, P: 0.02% or less, and S: 0.01% or less, with the remainder including iron and inevitable impurities and has a martensite single-phase structure as its steel microstructure. In a surface region of the steel sheet from the surface to a depth one-tenth the gauge, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, where the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 100 μm or more. The steel sheet is a high-strength cold-rolled steel sheet which has a sufficiently minimized rate of bending fracture starting from inclusions and thereby has excellent bending workability.
摘要翻译：冷轧钢板的化学成分为C：0.12〜0.3％，Si：0.5％以下，Mn：小于1.5％，Al：0.15％以下，N：0.01％以下，P：0.02 ％以下，S：0.01％以下，余量包括铁和不可避免的杂质，并具有马氏体单相结构作为其钢微观结构。从表面到表面的十分之一的钢板的表面区域，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为100μm以上。钢板是从夹杂物开始的弯曲断裂率足够的最小化的弯曲加工性优异的高强度冷轧钢板。

3. 发明申请

US20100247957A1 HIGH-STRENGTH COLD-ROLLED STEEL SHEET EXCELLENT IN BENDING WORKABILITY 有权
标题翻译：高强度冷轧钢板优良的弯曲工作性能
公开(公告)号：US20100247957A1
公开(公告)日：2010-09-30
申请号：US12708109
申请日：2010-02-18
申请人： Tetsuji HOSHIKA , Sae Mizuta , Yuichi Futamura , Masaaki Miura , Yukihiro Utsumi , Hiroaki Matsumoto , Hiroki Ohta
发明人： Tetsuji HOSHIKA , Sae Mizuta , Yuichi Futamura , Masaaki Miura , Yukihiro Utsumi , Hiroaki Matsumoto , Hiroki Ohta
IPC分类号： B32B15/01 , C22C38/00 , C22C38/60 , C22C38/16 , C22C38/06 , C22C38/18 , C22C38/04 , C22C38/42
CPC分类号： C22C38/04 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/18 , Y10T428/12799 , Y10T428/12972 , Y10T428/2495
摘要： Disclosed is a cold-rolled steel sheet having a specific steel composition and having a composite steel structure including a ferrite structure and a martensite-containing second phase. In a surface region of the steel sheet from the surface to a depth one-tenth the gage, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, in which the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 80 μm or more. Also disclosed is a cold-rolled steel sheet having a specific steel composition and having a steel structure of a martensite single-phase structure. In the surface region, the number density of groups of inclusions, in which the distance between the outermost surfaces is 100 μm or more, is 120 or less per 100 cm2 of a rolling plane.
摘要翻译：公开了一种具有特定钢组成并具有包括铁素体组织和含马氏体的第二相的复合钢结构的冷轧钢板。从表面到表面十分之一的钢板的表面区域中，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为80μm以上。还公开了具有特定钢组成并具有马氏体单相结构的钢结构的冷轧钢板。在表面区域中，最外表面之间的距离为100μm以上的夹杂物组的数密度为每100平方厘米的轧制面为120个以下。

4. 发明授权

US08460800B2 High-strength cold-rolled steel sheet excellent in bending workability 有权
标题翻译：弯曲加工性优异的高强度冷轧钢板
公开(公告)号：US08460800B2
公开(公告)日：2013-06-11
申请号：US12708109
申请日：2010-02-18
申请人： Tetsuji Hoshika , Sae Mizuta , Yuichi Futamura , Masaaki Miura , Yukihiro Utsumi , Hiroaki Matsumoto , Hiroki Ohta
发明人： Tetsuji Hoshika , Sae Mizuta , Yuichi Futamura , Masaaki Miura , Yukihiro Utsumi , Hiroaki Matsumoto , Hiroki Ohta
IPC分类号： B32B15/01 , B32B15/04 , B32B15/18
CPC分类号： C22C38/04 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/18 , Y10T428/12799 , Y10T428/12972 , Y10T428/2495
摘要： Disclosed is a cold-rolled steel sheet having a specific steel composition and having a composite steel structure including a ferrite structure and a martensite-containing second phase. In a surface region of the steel sheet from the surface to a depth one-tenth the gage, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, in which the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 80 μm or more. Also disclosed is a cold-rolled steel sheet having a specific steel composition and having a steel structure of a martensite single-phase structure. In the surface region, the number density of groups of inclusions, in which the distance between the outermost surfaces is 100 μm or more, is 120 or less per 100 cm2 of a rolling plane.
摘要翻译：公开了一种具有特定钢组成并具有包括铁素体组织和含马氏体的第二相的复合钢结构的冷轧钢板。从表面到表面十分之一的钢板的表面区域中，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为80μm以上。还公开了具有特定钢组成并具有马氏体单相结构的钢结构的冷轧钢板。在表面区域中，最外表面之间的距离为100μm以上的夹杂物组的数密度为每100平方厘米的轧制平面为120以下。

5. 发明授权

US09745639B2 High-strength steel sheet excellent in workability and cold brittleness resistance, and manufacturing method thereof 有权
公开(公告)号：US09745639B2
公开(公告)日：2017-08-29
申请号：US13489005
申请日：2012-06-05
申请人： Sae Mizuta , Yuichi Futamura , Yukihiro Utsumi
发明人： Sae Mizuta , Yuichi Futamura , Yukihiro Utsumi
IPC分类号： C22C38/04 , C22C38/02 , C21D1/20 , C21D9/46 , C22C38/00 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C21D8/04
CPC分类号： C21D1/20 , C21D8/0447 , C21D8/0463 , C21D8/0473 , C21D9/46 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18
摘要： The invention relates to a steel sheet having a tensile strength of 1180 MPa or more, which excels in workability and cold brittleness resistance. The high-strength steel sheet contains 0.10% to 0.30% of C, 1.40% to 3.0% of Si, 0.5% to 3.0% of Mn, 0.1% or less of P, 0.05% or less of S, 0.005% to 0.20% of Al, 0.01% or less of N, 0.01% or less of O, as well as Fe and inevitable impurities. The steel sheet has: (i) a ferrite volume fraction of 5% to 35% and a bainitic ferrite and/or tempered martensite volume fraction of 60% or more; (ii) a MA constituent volume fraction of 6% or less (excluding 0%); and (iii) a retained austenite volume fraction of 5% or more.

6. 发明申请

US20140044988A1 HIGH-STRENGTH STEEL SHEET EXCELLENT IN WORKABILITY AND MANUFACTURING METHOD THEREOF 审中-公开
标题翻译：高强度钢板具有优异的可加工性及其制造方法
公开(公告)号：US20140044988A1
公开(公告)日：2014-02-13
申请号：US14008875
申请日：2012-03-21
申请人： Yuichi Futamura , Michiharu Nakaya , Takayuki Kimura
发明人： Yuichi Futamura , Michiharu Nakaya , Takayuki Kimura
IPC分类号： C22C38/58 , C22C38/22 , C22C38/38 , C22C38/34 , C22C38/28 , C22C38/42 , C22C38/50 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02
CPC分类号： C23C2/40 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0247 , C21D9/46 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/28 , C22C38/34 , C22C38/38 , C22C38/42 , C22C38/50 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28 , Y10T428/12799
摘要： Provided are: a high-strength steel sheet which is improved in both elongation and local formability and thus exhibits excellent workability; and a manufacturing method thereof. The high-strength steel sheet contains C, Si, Mn, Al, P and S with the remainder including iron and unavoidable impurities, and has a metal structure which includes polygonal ferrite, bainite, tempered martensite, and retained austenite. In the metal structure, (1) the bainite has a composite microstructure including both a high-temperature-formed bainite having an average distance between adjacent regions of retained austenite and/or carbide of 1 μm or more and a low-temperature-formed bainite having an average distance between adjacent regions of retained austenite and/or carbide of less than 1 μm each identified upon observation with a scanning electron microscope; and (2) the retained austenite is present in a volume percentage of 5% or more of the entire metal structure as determined by a saturation magnetization measurement.
摘要翻译：本发明提供一种提高伸长率和局部成形性的高强度钢板，由此表现出优异的可加工性; 及其制造方法。高强度钢板含有C，Si，Mn，Al，P和S，余量包括铁和不可避免的杂质，并且具有包括多边形铁素体，贝氏体，回火马氏体和残余奥氏体的金属结构。在金属结构中，（1）贝氏体具有复合微观结构，其包括具有残留奥氏体的相邻区域和/或1um以上的碳化物之间的平均距离的高温成形贝氏体和低温形成的贝氏体在用扫描电子显微镜观察时，在残留奥氏体的相邻区域和/或小于1μm的碳化物之间具有平均距离; 和（2）通过饱和磁化测量确定的残余奥氏体以整个金属结构的体积百分比为5％以上存在。

7. 发明申请

US20070196685A1 HIGH STRENGTH STEEL SHEET HAVING EXCELLENT FORMABILITY 审中-公开
标题翻译：具有优异的可塑性的高强度钢板
公开(公告)号：US20070196685A1
公开(公告)日：2007-08-23
申请号：US11627192
申请日：2007-01-25
申请人： Yuichi Futamura , Katsuhiro Yamamoto , Masaaki Miura
发明人： Yuichi Futamura , Katsuhiro Yamamoto , Masaaki Miura
IPC分类号： C22C38/22
CPC分类号： C22C38/38 , B32B15/013 , C21D6/008 , C21D8/0226 , C21D8/0236 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/18 , C22C38/22 , C22C38/34 , Y10T428/12799
摘要： A high strength steel sheet contains, in percent by mass, 0.03 to 0.2% of C, 0.5 to 2.5% of Si, 1 to 3.0% of Mn, 0.01 to 0.5% of Cr, 0.01 to 0.5% of Mo, 0.02 to 0.15% of Al, 0.15% or less of Ti, 0.15% or less of No, and 0.15% or less of V; wherein the remainder includes Fe and inevitable impurities, and the content of Si satisfies the following formula (1), α−4.1≦[Si]≦α−2.4, (1) provided, α=6.9×([C]+[Mn]/6+[Cr]/5+[Mo]/4+[Ti]/15+[Nb]/17+[V]/14)1/2 is given, wherein [ ] shows the quantity (mass percent) of each element contained in the steel sheet. The high strength steel sheet is improved in formability (particularly, elongation), and excellent in balance between strength and elongation.
摘要翻译：高强度钢板以质量计含有0.03〜0.2％的C，0.5〜2.5％的Si，1〜3.0％的Mn，0.01〜0.5％的Cr，0.01〜0.5％的Mo，0.02〜0.15 ，Al的0.15％以下，Ti：0.15％以下，V：0.15％以下，其中余量包括Fe和不可避免的杂质，Si的含量满足下式（1），<？in-line-formula description =“In-line formula”end =“lead”？> alpha-4.1 <= [ Si] <=α-2.4，（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>提供，<？in-line-formula description =“In-line Formulas” α= 6.9×（[C] + [Mn] / 6 + [Cr] / 5 + [Mo] / 4 + [Ti] / 15 + [Nb] / 17 + [V] 给出了“直线公式”end =“tail”？>，其中[]表示每个元素的数量（质量百分比）包含在钢板中。高强度钢板的成型性（特别是伸长率）提高，强度和伸长率之间的平衡优异。

8. 发明申请

US20100003541A1 HIGH-STRENGTH HOT DIP GALVANNEALED STEEL SHEET HAVING HIGH POWDERING RESISTANCE AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：具有高耐磨性的高强度热镀锌钢板及其制造方法
公开(公告)号：US20100003541A1
公开(公告)日：2010-01-07
申请号：US12094997
申请日：2006-12-01
申请人： Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
发明人： Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
IPC分类号： B32B15/18
CPC分类号： C23C2/28 , C21D8/02 , C21D9/46 , C23C2/06 , Y10T428/12799 , Y10T428/12958 , Y10T428/12965 , Y10T428/265
摘要： Disclosed is a high-strength hot dip galvannealed steel sheet having high powdering resistance produced by employing such a constitution that a Fe—Zn alloy plated layer is provided on at least one side of a basis steel sheet and a region in which Al (atomic %)/Zn (atomic %)≧0.10 is present in a thickness of 300 Å or more from the surface of the plated layer along the depth direction of the plated layer. Also disclosed is a hot dip galvannealed steel sheet whose formability is greatly improved by optionally specifying chemical composition and structure of the basis steel sheet.
摘要翻译：本发明公开了一种通过采用这样一种构成，即在基材钢板的至少一面上设置Fe-Zn合金镀层和Al（原子％）的区域制成的耐高耐热性合金化热浸镀锌钢板，）/ Zn（原子％）> = 0.10从镀层的表面沿着镀层的深度方向以厚度为单位存在。还公开了通过任选地指定基础钢板的化学组成和结构，可以大大提高其成形性的热浸镀锌合金化热镀锌钢板。

9. 发明授权

US08349471B2 High-strength cold-rolled steel sheet excellent in workability and shape freezing property 有权
标题翻译：高强度冷加工性能优良的冷轧钢板
公开(公告)号：US08349471B2
公开(公告)日：2013-01-08
申请号：US12718397
申请日：2010-03-05
申请人： Michitaka Tsunezawa , Yuichi Futamura , Masaaki Miura
发明人： Michitaka Tsunezawa , Yuichi Futamura , Masaaki Miura
IPC分类号： B32B15/04 , B32B15/18 , C22C38/00
CPC分类号： C22C38/00 , Y10T428/12799 , Y10T428/12972
摘要： A high-strength cold-rolled steel sheet with improved TS-EL balance, springback value, workability and shape freezing properties having: a steel content including 0.10-0.20 mass % C, 0.5-2.5 mass % Si, 0.5-2.25 mass % Mn, and 0.01-0.10 mass % Al; a structure comprising (A) a mother phase structure of ferrite and (B) a second phase structure of retained austenite optionally including martensite; and satisfying the following expressions (1) and (2): (Vf×Vγ×Cγ×dis)/dia≧300 (1), dis≧1.0 μm (2); where Vf (%) is the volume fraction of the ferrite, Vγ (%) is the volume fraction of the retained austenite, Cγ (mass %) is the carbon content in the retained austenite, dis (μm) is the shortest distance between the second phase structures, and dia (μm) is the average grain size of the second phase structures.
摘要翻译：具有TS-EL平衡，回弹值，可加工性和形状冷冻性能改善的高强度冷轧钢板，其具有：含有0.10-0.20质量％C，0.5-2.5质量％Si，0.5-2.25质量％Mn的钢含量，0.01-0.10质量％Al; 包括（A）铁素体的母相结构和（B）任选包括马氏体的残余奥氏体的第二相组织的结构; 满足以下表达式（1）和（2）：（Vf×Vγ×Cγ×dis）/dia≥300（1），dis≥1.0μm（2）; 其中Vf（％）是铁素体的体积分数，Vγ（％）是残留奥氏体的体积分数，Cγ（质量％）是残留奥氏体中的碳含量，dis（μm）是第二相结构，dia（μm）是第二相结构的平均晶粒尺寸。

10. 发明授权

US08133330B2 High yield ratio and high-strength hot-dip galvanized steel sheet excellent in workability and production method thereof 有权
标题翻译：高产率和高强度热浸镀锌钢板，其加工性和制造方法优异
公开(公告)号：US08133330B2
公开(公告)日：2012-03-13
申请号：US12571753
申请日：2009-10-01
申请人： Yuichi Futamura , Masaaki Miura
发明人： Yuichi Futamura , Masaaki Miura
IPC分类号： C21D11/00 , C22C38/00
CPC分类号： C22C38/04 , C21D6/001 , C21D6/005 , C21D6/008 , C21D8/0405 , C21D8/0447 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/08 , C22C38/16 , C22C38/22 , C23C2/02 , C23C2/28
摘要： A high-strength hot-dip galvanized steel sheet excellent in workability according to the present invention: contains C, Si, Mn and other elements; has a dual phase structure containing ferrite and martensite as the metallographic structure; and, in the ferrite structure, satisfies the expression 0.2≦(Lb/La)≦1.5 when the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as La and the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are less than 10 degrees is defined as Lb, and further satisfies the requirements that the average value of D is 25 μm or less and the area ratio of crystal grains satisfying the expression D≦30 μm in the ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is 50% or more when the circle equivalent diameter of each of ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as D; and has a tensile strength of 980 MPa or more.
摘要翻译：本发明的加工性优异的高强度热浸镀锌钢板含有C，Si，Mn等元素; 具有含有铁素体和马氏体作为金相结构的双相结构; 并且在铁素体结构中，当晶体取向差为10度以上的晶粒的晶界的每单位面积的长度被定义为La时，铁素体结构满足表达式0.2＆nlE;（Lb / La）＆nlE; 1.5 将晶体取向差小于10度的晶粒的晶界的单位面积的长度定义为Lb，进一步满足D的平均值为25μm以下，晶体的面积比满足表达式D＆nlE的晶粒;当晶粒包围的铁素体晶体的圆当量直径由晶粒包围的晶体取向差为10度以上时，由晶粒边界包围的铁素体晶体中的30μm为30％以上其晶体取向差为10度以上的晶粒边界定义为D; 拉伸强度为980MPa以上。

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