公开(公告)号：US08535458B2

公开(公告)日：2013-09-17

申请号：US13318511

申请日：2010-05-11

申请人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Reiko Sugihara ,  Masahide Watabe ,  Yasushi Tanaka

发明人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Reiko Sugihara ,  Masahide Watabe ,  Yasushi Tanaka

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

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）。

公开(公告)号：US20120138197A1

公开(公告)日：2012-06-07

申请号：US13318511

申请日：2010-05-11

申请人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Reiko Sugihara ,  Masahide Watabe ,  Yasushi Tanaka

发明人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Reiko Sugihara ,  Masahide Watabe ,  Yasushi Tanaka

IPC分类号： C21D8/02 ,  C22C38/04

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）。

公开(公告)号：US20130199678A1

公开(公告)日：2013-08-08

申请号：US13699119

申请日：2011-05-23

申请人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Hidetaka Kawabe ,  Yasushi Tanaka

发明人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Hidetaka Kawabe ,  Yasushi Tanaka

IPC分类号： C21D8/02 ,  C22C38/24 ,  C22C38/22 ,  C22C38/14 ,  C22C38/00 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/38 ,  C22C38/12

CPC分类号： C21D8/0263 ,  C21D6/005 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/003 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/22 ,  C22C38/24 ,  C22C38/38

摘要： A high strength hot-rolled steel sheet with a tensile strength of not less than 590 MPa which exhibits excellent bake hardenability and stretch-flangeability has a chemical composition including, in terms of mass %, C at 0.040 to 0.10%, Si at not more than 0.3%, Mn at 1.7 to 2.5%, P at not more than 0.030%, S at not more than 0.005%, Al at not more than 0.1% and N at 0.006 to 0.025%, and microstructure wherein a bainite phase represents not less than 60%, the total of a ferrite phase and a pearlite phase represents not more than 10%, and the bainite phase includes grains among which cementite grains have been precipitated at not less than 1.4×104 grains/mm2 and the cementite grains have an average grain diameter of not more than 1.5 μm.

摘要翻译： 具有优异的烘烤淬透性和拉伸凸缘性的抗拉强度不低于590MPa的高强度热轧钢板具有以质量％计含有0.040〜0.10％的C的化学组成，不超过Si 不超过0.3％，Mn为1.7〜2.5％，P为0.030％以下，S为0.005％以下，Al为0.1％以下，N为0.006〜0.025％，其中贝氏体相为不 小于60％，铁素体相和珠光体相的总和为10％以下，贝氏体相为含有不少于1.4×104个/ mm 2的渗碳体粒子的晶粒，渗碳体为 平均粒径不超过1.5μm。

公开(公告)号：US09284618B2

公开(公告)日：2016-03-15

申请号：US13699119

申请日：2011-05-23

申请人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Hidetaka Kawabe ,  Yasushi Tanaka

发明人： Noriaki Kohsaka ,  Kazuhiro Seto ,  Hidetaka Kawabe ,  Yasushi Tanaka

IPC分类号： C21D8/02 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/08 ,  C22C38/22 ,  C22C38/24 ,  C22C38/38

CPC分类号： C21D8/0263 ,  C21D6/005 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/003 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/22 ,  C22C38/24 ,  C22C38/38

摘要： A high strength hot-rolled steel sheet with a tensile strength of not less than 590 MPa which exhibits excellent bake hardenability and stretch-flangeability has a chemical composition including, in terms of mass %, C at 0.040 to 0.10%, Si at not more than 0.3%, Mn at 1.7 to 2.5%, P at not more than 0.030%, S at not more than 0.005%, Al at not more than 0.1% and N at 0.006 to 0.025%, and microstructure wherein a bainite phase represents not less than 60%, the total of a ferrite phase and a pearlite phase represents not more than 10%, and the bainite phase includes grains among which cementite grains have been precipitated at not less than 1.4×104 grains/mm2 and the cementite grains have an average grain diameter of not more than 1.5 μm.

摘要翻译： 具有优异的烘烤淬透性和拉伸凸缘性的抗拉强度不低于590MPa的高强度热轧钢板具有以质量％计含有0.040〜0.10％的C的化学组成，不超过Si 不超过0.3％，Mn为1.7〜2.5％，P为0.030％以下，S为0.005％以下，Al为0.1％以下，N为0.006〜0.025％，其中贝氏体相为不 小于60％，铁素体相和珠光体相的总和为10％以下，贝氏体相为含有不少于1.4×104个/ mm 2的渗碳体粒子的晶粒，渗碳体为 平均粒径不大于1.5μm。

公开(公告)号：US20130233453A1

公开(公告)日：2013-09-12

申请号：US13704781

申请日：2011-06-29

申请人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto ,  Noriyuki Katayama

发明人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto ,  Noriyuki Katayama

IPC分类号： C21D8/02 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/18 ,  C22C38/08

CPC分类号： C21D8/0263 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18

摘要： A thin high strength steel sheet having excellent formability has a composition which includes, by mass %, 0.08 to 0.15% of C, 0.5 to 1.5% of Si, 0.5 to 1.5% of Mn, 0.01 to 0.1% of Al, and 0.005% or less of N to form a hot rolled sheet is conducted.

摘要翻译： 成形性优异的薄型高强度钢板的组成为：以质量％计，C：0.08〜0.15％，Si：0.5〜1.5％，Mn：0.5〜1.5％，Al：0.01〜0.1％，0.005％ 以下的N以形成热轧板。

公开(公告)号：US20130160907A1

公开(公告)日：2013-06-27

申请号：US13819877

申请日：2011-09-05

申请人： Hidetaka Kawabe ,  Masanori Nishizawa ,  Kazuhiro Seto

发明人： Hidetaka Kawabe ,  Masanori Nishizawa ,  Kazuhiro Seto

IPC分类号： C21D8/02 ,  C22C38/12 ,  C22C38/00 ,  C22C38/04 ,  C22C38/02 ,  C22C38/14 ,  C22C38/06

CPC分类号： C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y02P10/212

摘要： A steel is subjected to a hot rolling step, a cold rolling step, and an annealing step having a maximum achieving temperature: 800° C. to 900° C., two-step heating, and two-step cooling. The two-step heating includes first-step heating to (maximum achieving temperature—(10° C. to 50° C.)) at an average temperature raising rate: 0.5° C. to 5.0° C./s and second-step heating in which the temperature raising time from that temperature range to the maximum achieving temperature is specified to be 30 to 150 s. Two-step cooling includes first-step cooling to cool from the maximum achieving temperature at a cooling rate of 10° C. to 40° C./s and second-step cooling to cool to a temperature range of 400° C. to 500° C. at a cooling rate of 0.2 to 0.8 times the first-step cooling rate for a cooling time of 0.2 to 0.8 times the total cooling time.

摘要翻译： 对钢进行热轧工序，冷轧工序，退火工序，最高实现温度为800℃〜900℃，两步加热，两步冷却。 两步加热包括以平均升温速度：0.5℃至5.0℃/秒的第一步加热至（最高达到温度（10℃至50℃）），第二步 从该温度范围到最高实现温度的升温时间的加热规定为30〜150秒。 两步冷却包括从10℃至40℃/秒的冷却速度从最高达到温度冷却的第一步冷却，第二步冷却冷却至400℃至500℃的温度范围 ℃，冷却速度为冷却时间为总冷却时间的0.2〜0.8倍的第一步冷却速度的0.2〜0.8倍。

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：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：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。