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21.发明授权公开(公告)号：US08535458B2
公开(公告)日：2013-09-17
申请号：US13318511
申请日：2010-05-11
CPC分类号： C22C38/04 , B21B3/00 , C21D8/0226 , C21D8/0263 , C21D9/46 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/14
摘要： A steel sheet contains, on a mass percent basis, 0.03%-0.12% C, 0.5% or less Si, 0.8%-1.8% Mn, 0.030% or less P, 0.01% or less S, 0.005%-0.1% Al, 0.01% or less N, 0.035%-0.100% Ti, and the balance being Fe and incidental impurities and has microstructures with a fraction of polygonal ferrite of 80% or more, the polygonal ferrite having an average grain size of 5 to 10 μm. The amount of Ti present in a precipitate having a size of less than 20 nm is 70% or more of the value of Ti* calculated using expression (1): Ti*=[Ti]−48×[N]/14 (1) where [Ti] and [N] represent a Ti content (percent by mass) and a N content percent by mass), respectively, of the steel sheet.
摘要翻译： 钢板以质量％计含有0.03％-0.12％C，0.5％以下Si，0.8％-1.8％Mn，0.030％以下P，0.01％以下S，0.005％〜0.1％Al， 0.01％以下的N，0.035％〜1.00％的Ti，余量为Fe和杂质，具有多边形铁素体的分数为80％以上的微结构，多边形铁素体的平均粒径为5〜10μm。 存在于尺寸小于20nm的析出物中的Ti的量为使用表达式（1）计算的Ti *值的70％以上：Ti * = [Ti] -48×[N] / 14（1 ）其中[Ti]和[N]分别表示钢板的Ti含量（质量％）和N含量百分比）。
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22.发明申请公开(公告)号：US20120138197A1
公开(公告)日：2012-06-07
申请号：US13318511
申请日：2010-05-11
CPC分类号： C22C38/04 , B21B3/00 , C21D8/0226 , C21D8/0263 , C21D9/46 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/14
摘要： A steel sheet contains, on a mass percent basis, 0.03%-0.12% C, 0.5% or less Si, 0.8%-1.8% Mn, 0.030% or less P, 0.01% or less S, 0.005%-0.1% Al, 0.01% or less N, 0.035%-0.100% Ti, and the balance being Fe and incidental impurities and has microstructures with a fraction of polygonal ferrite of 80% or more, the polygonal ferrite having an average grain size of 5 to 10 μm. The amount of Ti present in a precipitate having a size of less than 20 nm is 70% or more of the value of Ti* calculated using expression (1): Ti*=[Ti]−48×[N]/14 (1) where [Ti] and [N] represent a Ti content (percent by mass) and a N content percent by mass), respectively, of the steel sheet.
摘要翻译： 钢板以质量％计含有0.03％-0.12％C，0.5％以下Si，0.8％-1.8％Mn，0.030％以下P，0.01％以下S，0.005％〜0.1％Al， 0.01％以下的N，0.035％〜1.00％的Ti，余量为Fe和杂质，具有多边形铁素体分数为80％以上的微结构，多边形铁素体的平均粒径为5〜10μm。 存在于尺寸小于20nm的析出物中的Ti的量为使用表达式（1）计算的Ti *值的70％以上：Ti * = [Ti] -48×[N] / 14（1 ）其中[Ti]和[N]分别表示钢板的Ti含量（质量％）和N含量百分比）。
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公开(公告)号：US20090095381A1
公开(公告)日：2009-04-16
申请号：US11989182
申请日：2006-08-03
申请人： Tamako Ariga , Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto
发明人： Tamako Ariga , Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto
CPC分类号： C23C2/06 , C21D9/46 , C21D2211/005 , C22C38/04 , C22C38/12 , C22C38/14 , C23C2/02 , Y10T428/12757 , Y10T428/12799
摘要： A high tensile steel sheet having 980 MPa or higher tensile strength with excellent elongation and stretch-flange formability, suitable for the press-forming of complex cross sectional shape such as automobile parts, is manufactured by adjusting the steel to consist essential of a ferrite single phase structure, to precipitate carbide containing Ti, Mo, and V, of smaller than 10 nm of average particle size, in dispersed state, and to have an average composition of the carbide containing Ti, Mo, and V satisfying [V/(Ti+Mo+V)≧0.3 (atomic ratio].
摘要翻译： 通过调整钢来制造适用于汽车零件等复杂截面形状的压制成型的拉伸强度高达980MPa或更高的拉伸强度和拉伸凸缘成形性的高强度钢板， 在分散状态下析出平均粒径小于10nm的Ti，Mo和V的碳化物，使含有Ti，Mo和V的碳化物的平均组成满足[V /（Ti + Mo + V）> = 0.3（原子比）。
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24.发明授权
公开(公告)号：US5542994A
公开(公告)日：1996-08-06
申请号：US363365
申请日：1994-12-23
申请人： Kazuhiro Seto , Kaneharu Okuda , Kei Sakata , Toshiyuki Kato , Takashi Ono
发明人： Kazuhiro Seto , Kaneharu Okuda , Kei Sakata , Toshiyuki Kato , Takashi Ono
CPC分类号： C21D9/48 , C21D8/0426 , C21D1/185 , C21D1/26 , C21D2211/00 , C21D2211/005 , C21D8/0473
摘要： A method of producing a high-formable, high-strength cold-rolled steel sheet from a steel slab comprising a steel with very low carbon content, one or both of Ti and Nb as a composition for forming a carbide or a nitride, and B in the range satisfying the following expression:0.001 A.ltoreq.B (wt %).ltoreq.0.003 Awherein A is a parameter determined approximately by the following expression with reference to the relation:A=P (wt %)+0.2 Mn (wt %)+0.8 Si (wt %)-0.2, subjecting the steel to a hot rolling so as to finish at a temperature between about Ar.sub.3 transformation temperature and about Ar.sub.3 transformation temperature +100 C.degree.. Thereafter, the steel is successively subjected to coiling, cold-rolling and, then, continuous annealing at temperatures between Ac.sub.1 transformation temperature +5 C.degree. and Ac.sub.1 transformation temperature +50 C.degree., and not lower than 860 C.degree.. Thus, a volume percentage of a low temperature transformation phase is controlled within the range of about 5 to about 50%, thereby obtaining a high strength cold-rolled steel sheet having a tensile strength of 38 kgf/mm.sup.2 or more, plus excellent formability and resistance to secondary working embrittlement.
摘要翻译： 作为用于形成碳化物或氮化物的组合物，由含有碳含量非常低的钢，Ti和Nb中的一种或两种的钢坯制造高成形性高强度冷轧钢板的方法，以及B 在满足以下表达式的范围内：0.001A
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25.发明申请公开(公告)号：US20150101717A1
公开(公告)日：2015-04-16
申请号：US14395929
申请日：2012-04-26
申请人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
发明人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
CPC分类号： C22C38/14 , B32B15/013 , C21D8/0263 , C21D8/04 , C21D8/0426 , C21D8/0463 , C21D9/46 , C21D2211/004 , C21D2211/005 , C22C18/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A slab has a steel composition including 0.020% to 0.065% of C, 0.1% or less of Si, 0.40% to less than 0.80% of Mn, 0.030% or less of P, 0.005% or less of S, 0.08% to 0.16% of Ti, 0.005% to 0.1% of Al, 0.005% or less of N, and the balance being Fe and incidental impurities, in which Ti*(=Ti−(48/14)×N) satisfies [Ti*≧0.08] and [0.300≦C/Ti*≦0.375], is subjected to hot rolling to obtain a hot-rolled steel sheet in which the steel microstructure includes, in terms of area fraction, 95% or more of a ferrite phase; the average ferrite grain size is 10 μm or less; the average grain size of Ti carbides precipitated in steel is 10 nm or less; and Ti in the amount of 80% or more of Ti* is precipitated as Ti carbides.
摘要翻译： 钢坯的组成为：C：0.020〜0.065％，Si：0.1％以下，Si：0.40％〜0.80％，P：0.030％以下，S：0.005％以下，S：0.08〜0.16 Ti = 0.005％〜0.1％，N为0.005％以下，余量为Ti *（= Ti-（48/14）×N）为Fe [Ti *≥0.08] ]和[0.300＆nlE; C / Ti *＆nlE; 0.375]进行热轧，得到其中钢组织包含面积率为95％以上的铁素体相的热轧钢板; 平均铁素体晶粒尺寸为10μm以下; 钢中析出的Ti碳化物的平均粒径为10nm以下; Ti的含量为80％以上的Ti作为Ti碳化物析出。
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26.发明授权公开(公告)号：US08628630B2
公开(公告)日：2014-01-14
申请号：US13390198
申请日：2010-08-19
申请人： Akio Kobayashi , Yoshimasa Funakawa , Kazuhiro Seto , Nobuyuki Kageyama , Tetsuo Yamamoto , Toru Hoshi , Takeshi Yokota
发明人： Akio Kobayashi , Yoshimasa Funakawa , Kazuhiro Seto , Nobuyuki Kageyama , Tetsuo Yamamoto , Toru Hoshi , Takeshi Yokota
摘要： A hot-pressed steel sheet member has a composition containing, by mass, C: 0.09% to 0.38%, Si: 0.05% to 2.0%, Mn: 0.5% to 3.0%, P: 0.05% or less, S: 0.05% or less, Al: 0.005% to 0.1%, N: 0.01% or less, Sb: 0.002% to 0.03%, and the balance being Fe and inevitable impurities, and having a tensile strength TS of 980 to 2,130 MPa.
摘要翻译： 热压钢板构件的组成为：C：0.09〜0.38％，Si：0.05〜2.0％，Mn：0.5〜3.0％，P：0.05％以下，S：0.05％ 以下，Al：0.005〜0.1％，N：0.01％以下，Sb：0.002〜0.03％，余量为Fe和不可避免的杂质，拉伸强度TS为980〜2130MPa。
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27.发明申请公开(公告)号：US20120216925A1
公开(公告)日：2012-08-30
申请号：US13390198
申请日：2010-08-19
申请人： Akio Kobayashi , Yoshimasa Funakawa , Kazuhiro Seto , Nobuyuki Kageyama , Tetsuo Yamamoto , Toru Hoshi , Takeshi Yokota
发明人： Akio Kobayashi , Yoshimasa Funakawa , Kazuhiro Seto , Nobuyuki Kageyama , Tetsuo Yamamoto , Toru Hoshi , Takeshi Yokota
IPC分类号： C21D8/00 , C22C38/42 , C22C38/44 , C22C38/60 , C22C38/12 , C22C38/04 , C22C38/06 , C22C38/02 , C22C38/14
摘要： A hot-pressed steel sheet member has a composition containing, by mass, C: 0.09% to 0.38%, Si: 0.05% to 2.0%, Mn: 0.5% to 3.0%, P: 0.05% or less, S: 0.05% or less, Al: 0.005% to 0.1%, N: 0.01% or less, Sb: 0.002% to 0.03%, and the balance being Fe and inevitable impurities, and having a tensile strength TS of 980 to 2,130 MPa.
摘要翻译： 热压钢板构件的组成为：C：0.09〜0.38％，Si：0.05〜2.0％，Mn：0.5〜3.0％，P：0.05％以下，S：0.05％ 以下，Al：0.005〜0.1％，N：0.01％以下，Sb：0.002〜0.03％，余量为Fe和不可避免的杂质，拉伸强度TS为980〜2130MPa。
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公开(公告)号：US07955444B2
公开(公告)日：2011-06-07
申请号：US11989182
申请日：2006-08-03
申请人： Tamako Ariga , Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto
发明人： Tamako Ariga , Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto
CPC分类号： C23C2/06 , C21D9/46 , C21D2211/005 , C22C38/04 , C22C38/12 , C22C38/14 , C23C2/02 , Y10T428/12757 , Y10T428/12799
摘要： A high tensile steel sheet having 980 MPa or higher tensile strength with excellent elongation and stretch-flange formability, suitable for the press-forming of complex cross sectional shape such as automobile parts, is manufactured by adjusting the steel to consist essential of a ferrite single phase structure, to precipitate carbide containing Ti, Mo, and V, of smaller than 10 nm of average particle size, in dispersed state, and to have an average composition of the carbide containing Ti, Mo, and V satisfying [V/(Ti+Mo+V)≧0.3 (atomic ratio].
摘要翻译： 通过调整钢来制造适用于汽车零件等复杂截面形状的压制成型的拉伸强度高达980MPa或更高的拉伸强度和拉伸凸缘成形性的高强度钢板， 在分散状态下析出平均粒径小于10nm的Ti，Mo和V的碳化物，使含有Ti，Mo和V的碳化物的平均组成满足[V /（Ti + Mo + V）≥0.3（原子比）。
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29.发明授权公开(公告)号：US07347902B2
公开(公告)日：2008-03-25
申请号：US10479773
申请日：2002-06-04
申请人： Tetsuya Mega , Kei Sakata , Kazuhiro Seto
发明人： Tetsuya Mega , Kei Sakata , Kazuhiro Seto
CPC分类号： C21D9/34 , C21D8/0263 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12
摘要： According to the invention, a high-strength hot rolled steel sheet having an excellent shape fixability as hot-rolled and an excellent fatigue durability after the forming, excellent weldability and phosphatability and a tensile strength of not less than 590 MPa level can be obtained by comprising C: not less than 0.02 mass % but not more than 0.2 mass %, Si: not less than 0.5 mass % but not more than 2.0 mass %, Mn: not less than 1.0 mass % but not more than 3.0 mass %, Al: not less than 0.01 mass % but not more than 0.1 mass %, N: not less than 0.002 mass % but not more than 0.006 mass %, P: not more than 0.03 mass %, S: not more than 0.01 mass % and solid-soluted (C+N): not less than 0.0010 mass % and the reminder being Fe and inevitable impurities, and having a steel structure that a primary phase is ferrite and a secondary phase is martensite phase of 5-30 % at a volume ratio and a total of both is not less than 95 % as a volume ratio, and further having an average crystal grain size of ferrite of not more than 8 μm.
摘要翻译： 根据本发明，可以通过以下方式获得具有热轧成形性优异，成形后优异的耐疲劳性，优异的焊接性，磷化性，拉伸强度为590MPa以上的高强度热轧钢板 C：0.02质量％以上0.2质量％以下Si：0.5质量％以上2.0质量％以下Mn：1.0质量％以上3.0质量％以下Al： ：0.01质量％以上且0.1质量％以下N：0.002质量％以上0.006质量％以下P：0.03质量％以下S：0.01质量％以下固体 （C + N）：不小于0.0010质量％，并且提醒为Fe和不可避免的杂质，并且具有初级相为铁素体的钢结构，第二相为体积比为5-30％的马氏体相 并且两者的总和不小于体积比的95％，并且还具有平均晶粒s 铁素体不超过8毫米。
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30.发明申请公开(公告)号：US20070119521A1
公开(公告)日：2007-05-31
申请号：US11592613
申请日：2006-11-03
申请人： Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto , Yoshihiro Hosoya , Thomas Heller , Brigitte Hammer , Rolf Bode , Gunter Stich
发明人： Takeshi Yokota , Akio Kobayashi , Kazuhiro Seto , Yoshihiro Hosoya , Thomas Heller , Brigitte Hammer , Rolf Bode , Gunter Stich
IPC分类号： C22C38/14
CPC分类号： C21D8/0226 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： A high strength steel, including about 0.05 to about 0.25% of C, less than about 0.5% of Si, about 0.5 to about 3.0% of Mn, not more than about 0.06% of P, not more than about 0.01% of S, about 0.50 to about 3.0% of Sol. Al, not more than about 0.02% of N, about 0.1 to about 0.8% of Mo, about 0.02 to about 0.40% of Ti, and the balance of iron and unavoidable impurities, wherein the steel has a structure formed of at least three phases including a bainite phase, and a retained austenite phase in addition to a ferrite phase having a composite carbide containing Ti and Mo dispersed and precipitated therein, wherein the total volume of the ferrite phase and the bainite phase is not smaller than 80%, the volume of the bainite phase is about 5% to about 60%, and the volume of the retained austenite phase is about 3 to about 20%.
摘要翻译： 一种高强度钢，包括约0.05至约0.25％的C，小于约0.5％的Si，约0.5至约3.0％的Mn，不大于约0.06％的P，不大于约0.01％的S， 约0.50至约3.0％的Sol。 Al，不大于约0.02％的N，约0.1至约0.8％的Mo，约0.02至约0.40％的Ti，余量为铁和不可避免的杂质，其中钢具有由至少三相形成的结构 包括贝氏体相和残留奥氏体相以及其中分散有析出Ti和Mo的复合碳化物的铁素体相，其中铁素体相和贝氏体相的总体积不小于80％，体积 的贝氏体相为约5％至约60％，并且残余奥氏体相的体积为约3至约20％。
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