公开(公告)号：US20090308504A1

公开(公告)日：2009-12-17

申请号：US12159017

申请日：2007-01-29

申请人： Nobusuke Kariya ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Kazuhiro Seto

发明人： Nobusuke Kariya ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Kazuhiro Seto

IPC分类号： C21D8/02 ,  C22C38/18 ,  C22C38/08 ,  C22C38/00

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/22

摘要： A steel sheet excellent in FB performance and also excellent in fabrication performance after FB working and a manufacturing method of the same are provided. The steel sheet is a steel sheet having a composition containing from 0.1 to 0.5% of C, not more than 0.5% of Si and from 0.2 to 1.5% of Mn in terms of % by mass, with P and S being adjusted at proper ranges and having a structure having a ferrite having an average grain size of more than 10 μm and less than 20 μm and a cementite present in the ferrite grain having an average particle size of from 0.3 to 1.5 μm. In this way, the steel sheet becomes a steel sheet excellent in FB performance, mold life and performance (side bend elongation) after FB working.

摘要翻译： 提供FB性能优异且FB加工后的制造性能优异的钢板及其制造方法。 该钢板是具有以质量％计含有C：0.1〜0.5％，Si：0.5％以下，Mn：0.2〜1.5％的组成的钢板，P和S为适当范围 并且具有平均粒度大于10μm且小于20μm的铁素体和平均粒径为0.3〜1.5μm的铁素体晶粒中存在的渗碳体的结构。 这样，钢板成为FB加工后FB性能，模具寿命和性能（侧弯伸长率）优异的钢板。

公开(公告)号：US20090173415A1

公开(公告)日：2009-07-09

申请号：US12159010

申请日：2007-01-29

申请人： Kazuhiro Seto ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Nobusuke Kariya

发明人： Kazuhiro Seto ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Nobusuke Kariya

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/08

CPC分类号： C21D1/18 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04

摘要： A steel sheet excellent in FB performance-and also excellent in fabrication performance after FB working and a manufacturing method of the same are provided. The steel sheet is a steel sheet having a composition containing from 0.1 to 0.5% of C, not more than 0.5% of Si and from 0.2 to 1.5% of Mn in terms of % by mass, with P and S being adjusted at proper ranges, and having a structure in which a ferrite has an average grain size of from 1 to 10 μm, cementite has a spheroidization ratio of 80% or more, and of the cementite, an amount Sgb of ferrite intergranular cementite which is defined by the following expression (1): Sgb(%)={Son/(Son+Sin)}×100 (wherein Son represents a total occupied area of cementite present on the ferrite grain boundary of the cementite present per unit area; and Snin represents a total occupied area of cementite present in a ferrite grain of the cementite present per unit area) is 40% or more. In this way, the steel sheet becomes a steel sheet excellent in FB performance, mold life and performance after FB working.

摘要翻译： 提供FB性能优异的钢板以及FB加工后的制造性能优异的制造方法及其制造方法。 该钢板是具有以质量％计含有C：0.1〜0.5％，Si：0.5％以下，Mn：0.2〜1.5％的组成的钢板，P和S为适当范围 并且具有铁素体的平均粒径为1〜10μm的结构，渗碳体的球化率为80％以上，渗碳体为铁素体晶间渗碳体的量Sgb，其由下述定义 表达式（1）：Sgb（％）= {Son /（Son + Sin）}×100（其中Son表示存在于每单位面积的渗碳体的铁素体晶界上存在的渗碳体的总占据面积; Snin表示总占用面积 存在于每单位面积的渗碳体的铁素体晶粒中的渗碳体的面积为40％以上。 这样，钢板成为FB工作后FB性能，模具寿命和性能优异的钢板。

公开(公告)号：US20100196189A1

公开(公告)日：2010-08-05

申请号：US12670153

申请日：2008-07-31

申请人： Koichi Nakagawa ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Kazuhiro Seto ,  Satoshi Kinoshiro ,  Katsumi Yamada

发明人： Koichi Nakagawa ,  Takeshi Yokota ,  Nobuyuki Nakamura ,  Kazuhiro Seto ,  Satoshi Kinoshiro ,  Katsumi Yamada

IPC分类号： C22C38/22 ,  C22C38/04 ,  C22C38/14 ,  C22C38/18 ,  C22C38/12

CPC分类号： C22C38/04 ,  C21D8/0426 ,  C21D9/48 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28

摘要： A high-strength steel sheet has high stretch flangeability after working and corrosion resistance after painting. The steel sheet contains, on the basis of mass percent, C: 0.02% to 0.20%, Si: 0.3% or less, Mn: 0.5% to 2.5%, P: 0.06% or less, S: 0.01% or less, Al: 0.1% or less, Ti: 0.05% to 0.25%, and V: 0.05% to 0.25%, the remainder being Fe and incidental impurities. The steel sheet has a substantially ferritic single phase, the ferritic single phase containing precipitates having a size of less than 20 nm, the precipitates containing 200 to 1750 mass ppm Ti and 150 to 1750 mass ppm V, V dissolved in solid solution being 200 or more but less than 1750 mass ppm.

摘要翻译： 高强度钢板在加工后具有高拉伸凸缘性和涂漆后的耐腐蚀性。 钢板以质量％计含有C：0.02〜0.20％，Si：0.3％以下，Mn：0.5〜2.5％，P：0.06％以下，S：0.01％以下，Al ：0.1％以下，Ti：0.05％〜0.25％，V：0.05％〜0.25％，余量为Fe和附带杂质。 钢板具有基本上铁素体的单相，铁素体单相含有尺寸小于20nm的析出物，析出物含有Ti为200〜1750质量ppm，V为150〜1750质量ppm，溶解在固溶体中的V为200或 更多但小于1750质量ppm。

公开(公告)号：US09044920B2

公开(公告)日：2015-06-02

申请号：US13876659

申请日：2011-09-28

申请人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota ,  Yusuke Fushiwaki

发明人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota ,  Yusuke Fushiwaki

IPC分类号： B32B15/18 ,  C23C2/02 ,  C21D8/04 ,  C21D9/48 ,  C21D9/56 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/38 ,  C22C38/60 ,  C23C2/06 ,  C23C2/28 ,  C21D8/02

CPC分类号： B32B15/18 ,  C21D8/0226 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D9/561 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/38 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12667

摘要： A high strength galvanized steel sheet having tensile strength of 590MPa or more which is excellent in fatigue property in punching work, and a manufacturing method thereof are provided. The microstructure includes a ferrite phase having an average grain diameter of 15 μm or less and an area fraction of 60% or more and a martensite phase having an area fraction of 5 to 40%, and an amount of one or more kinds of oxide selected from a group consisting of Fe, Si, Mn, Al, P, Nb, and Ti generated on a surface layer portion of the steel sheet within 100 μm in a steel-sheet-side depth direction from a surface of a base steel sheet directly below a galvanized layer is less than 0.060 g/m2 per one-side surface of the steel sheet.

摘要翻译： 提供一种拉伸强度为590MPa以上的冲压加工疲劳性优异的高强度镀锌钢板及其制造方法。 微观结构包括平均粒径为15μm以下，面积分率为60％以上的铁素体相，面积分数为5〜40％的马氏体相和选择的一种以上的氧化物的量 从钢基板表面直接在钢板侧深度方向上在钢板表面层上产生的由Fe，Si，Mn，Al，P，Nb，Ti组成的组中， 在镀锌层以下，钢板的单面表面小于0.060g / m 2。

公开(公告)号：US20130032253A1

公开(公告)日：2013-02-07

申请号：US13641509

申请日：2011-04-15

申请人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota

发明人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota

IPC分类号： B32B15/01 ,  C21D8/02 ,  C23C2/02

CPC分类号： C23C2/06 ,  B32B15/013 ,  C21D1/09 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2261/00 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/46 ,  C22C38/58 ,  C23C2/28

摘要： A galvanized steel sheet having excellent formability is provided including steel having a composition which contains, on a percent by mass basis, 0.03% to 0.15% of C, less than 0.5% of Si, 1.0% to 2.5% of Mn, 0.05% or less of P, 0.01% or less of S, 0.05% or less of Al, 0.0050% or less of N, 0.05% to 0.8% of Cr, 0.01% to 0.1% of V, and the balance being Fe and inevitable impurities; and a zinc plating film on a surface of a steel sheet, and wherein a microstructure of the steel contains ferrite having an average grain diameter of 15 μm or less and 5% to 40% of martensite in an area ratio, and the ratio of martensite having an aspect ratio of less than 3.0 to all the martensite is more than 95% in area ratio.

摘要翻译： 提供具有优异成形性的镀锌钢板，其包括具有以质量％计含有0.03％至0.15％的C，小于0.5％的Si，1.0％至2.5％的Mn，0.05％或 较少的P，0.01％以下的S，0.05％以下的Al，0.0050％以下的N，0.05〜0.8％的Cr，0.01〜0.1％的V，余量是Fe和不可避免的杂质; 以及钢板表面的镀锌膜，其特征在于，所述钢的微观组织含有平均粒径为15μm以下的铁素体和面积比为5〜40％的马氏体，并且所述马氏体的比例 所有马氏体的长宽比小于3.0的面积比大于95％。

公开(公告)号：US20130280551A1

公开(公告)日：2013-10-24

申请号：US13876659

申请日：2011-09-28

申请人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota ,  Yusuke Fushiwaki

发明人： Nobusuke Kariya ,  Hayato Saito ,  Takeshi Yokota ,  Yusuke Fushiwaki

IPC分类号： B32B15/18 ,  C23C2/02

CPC分类号： B32B15/18 ,  C21D8/0226 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D9/561 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/38 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40 ,  Y10T428/12611 ,  Y10T428/12618 ,  Y10T428/1266 ,  Y10T428/12667

摘要： A high strength galvanized steel sheet having tensile strength of 590 MPa or more which is excellent in fatigue property in punching work, and a manufacturing method thereof are provided. The microstructure includes a ferrite phase having an average grain diameter of 15 μm or less and an area fraction of 60% or more and a martensite phase having an area fraction of 5 to 40%, and an amount of one or more kinds of oxide selected from a group consisting of Fe, Si, Mn, Al, P, Nb, and Ti generated on a surface layer portion of the steel sheet within 100 μm in a steel-sheet-side depth direction from a surface of a base steel sheet directly below a galvanized layer is less than 0.060 g/m2 per one-side surface of the steel sheet.

摘要翻译： 提供了一种拉伸强度为590MPa以上的冲压加工疲劳性优异的高强度镀锌钢板及其制造方法。 微观结构包括平均粒径为15μm以下，面积分率为60％以上的铁素体相，面积分数为5〜40％的马氏体相和选择的一种或多种氧化物的量 从在钢板侧深度方向上从钢基板表面直接在钢板表面层上产生的由Fe，Si，Mn，Al，P，Nb和Ti组成的组中， 在镀锌层以下，钢板的单面表面小于0.060g / m 2。

公开(公告)号：US20110271733A1

公开(公告)日：2011-11-10

申请号：US12674281

申请日：2008-08-20

申请人： Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Ueoka ,  Nobuo Nishiura ,  Yoichi Tominaga

发明人： Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Ueoka ,  Nobuo Nishiura ,  Yoichi Tominaga

IPC分类号： B21D31/00

CPC分类号： C22C38/02 ,  C21D1/20 ,  C21D8/0426 ,  C21D8/0463 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/04

摘要： A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.

摘要翻译： 制造高强度热轧钢板的方法包括将板坯加热到1150-1300℃的温度范围内。 热轧板坯，精轧温度在800〜1000℃的范围内。 以30℃/ s以上的平均冷却速度将钢板冷却至525〜625℃的冷却终止温度。 暂停冷却一段时间在3到10秒的范围内; 以钢板的冷却成核沸腾的方式冷却钢板; 并在400〜550℃的范围内卷取钢板。

公开(公告)号：US08815025B2

公开(公告)日：2014-08-26

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 ,  Günter Stich

发明人： Takeshi Yokota ,  Akio Kobayashi ,  Kazuhiro Seto ,  Yoshihiro Hosoya ,  Thomas Heller ,  Brigitte Hammer ,  Rolf Bode ,  Günter Stich

IPC分类号： C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/02 ,  C22C38/04

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％。

公开(公告)号：US08646301B2

公开(公告)日：2014-02-11

申请号：US12674281

申请日：2008-08-20

申请人： Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Ueoka ,  Nobuo Nishiura ,  Yoichi Tominaga

发明人： Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Ueoka ,  Nobuo Nishiura ,  Yoichi Tominaga

IPC分类号： B21B27/06 ,  B21D31/00

CPC分类号： C22C38/02 ,  C21D1/20 ,  C21D8/0426 ,  C21D8/0463 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/04

摘要： A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.

摘要翻译： 制造高强度热轧钢板的方法包括将板坯加热到1150-1300℃的温度范围内。 热轧板坯，精轧温度在800〜1000℃的范围内。 以30℃/ s以上的平均冷却速度将钢板冷却至525〜625℃的冷却终止温度。 暂停冷却一段时间在3到10秒的范围内; 以钢板的冷却成核沸腾的方式冷却钢板; 并在400〜550℃的范围内卷取钢板。

公开(公告)号：US09212411B2

公开(公告)日：2015-12-15

申请号：US13381992

申请日：2010-06-29

申请人： Koichi Nakagawa ,  Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Kinoshiro ,  Yuji Tanaka ,  Katsumi Yamada ,  Tetsuya Mega ,  Katsumi Nakajima

发明人： Koichi Nakagawa ,  Takeshi Yokota ,  Kazuhiro Seto ,  Satoshi Kinoshiro ,  Yuji Tanaka ,  Katsumi Yamada ,  Tetsuya Mega ,  Katsumi Nakajima

IPC分类号： C21D9/28 ,  C22C38/12 ,  C22C38/02 ,  C21D8/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/0273 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/24 ,  C22C38/28 ,  Y10T428/12229

摘要： A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities.

摘要翻译： 高强度钢板包括以质量％计含有0.08％至0.20％的碳，0.2％至1.0％的硅，0.5％至2.5％的锰，0.04％以下的磷，0.005％以下的组合物 的硫，0.05％以下的铝，0.07〜0.20％的钛，0.20〜0.80％的钒，余量为铁和杂质。