公开(公告)号：US09657380B2

公开(公告)日：2017-05-23

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

IPC分类号： C22C38/14 ,  C22C38/04 ,  C22C38/06 ,  C22C38/02 ,  C21D8/02 ,  C21D8/04 ,  C22C38/00 ,  C21D9/46

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.

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

IPC分类号： C22C38/14 ,  C22C38/04 ,  C21D9/46 ,  C22C38/00 ,  C21D8/02 ,  C22C38/06 ,  C22C38/02

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。

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：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：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：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：US09073292B2

公开(公告)日：2015-07-07

申请号：US13805101

申请日：2011-06-29

申请人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto

发明人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto

IPC分类号： B32B15/04 ,  B32B15/18 ,  C23C2/28 ,  C21D8/02 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04

CPC分类号： B32B15/18 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  Y10T428/12799 ,  Y10T428/12972

摘要： A high strength galvanized steel sheet includes a steel sheet which is a base sheet and a galvanized layer on a surface of the steel sheet, the steel sheet has a composition including, by mass %, 0.08 to 0.15% of C, 0.5 to 1.5% of Si, 0.5 to 1.5% of Mn, 0.1% or less of P, 0.01% or less of S, 0.01 to 0.1% of Al, 0.005% or less of N, and the balance Fe with inevitable impurities, and a microstructure composed of 75 to 90% of a ferrite phase as a main phase and 10 to 25% of a second phase including at least pearlite in terms of an area fraction with respect to the entire microstructure; an average grain size of the pearlite is 5 μm or smaller; and the pearlite has an area fraction of 70% or greater with respect to the total area of the second phase.

摘要翻译： 高强度镀锌钢板包括钢板表面的基板和镀锌层的钢板，所述钢板的组成按质量％计含有C：0.08〜0.15％，C：0.5〜1.5％ 的Si，0.5〜1.5％的Mn，0.1％以下的P，0.01％以下的S，0.01〜0.1％的Al，0.005％以下的N，余量为Fe与不可避免的杂质，微结构 作为主相的铁素体相为75〜90％，相对于整个微观结构，以面积分数计至少包含珠光体的10〜25％的第二相; 珠光体的平均粒径为5μm以下; 并且珠光体相对于第二相的总面积的面积分数为70％以上。

公开(公告)号：US20130244056A1

公开(公告)日：2013-09-19

申请号：US13805101

申请日：2011-06-29

申请人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto

发明人： Kenji Kawamura ,  Hidetaka Kawabe ,  Kazuhiro Seto

IPC分类号： B32B15/18 ,  C23C2/28

CPC分类号： B32B15/18 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  Y10T428/12799 ,  Y10T428/12972

摘要： A high strength galvanized steel sheet having excellent formability, includes a steel sheet which is a base sheet and a galvanized layer on a surface of the steel sheet, wherein the steel sheet is a high strength steel sheet which has a composition including, by mass %, 0.08 to 0.15% of C, 0.5 to 1.5% of Si, 0.5 to 1.5% of Mn, 0.1% or less of P, 0.01% or less of S, 0.01 to 0.1% of Al, 0.005% or less of N, and the balance Fe with inevitable impurities, and a microstructure composed of 75 to 90% of a ferrite phase as a main phase and 10 to 25% of a second phase including at least pearlite in terms of an area fraction with respect to the entire microstructure; an average grain size of the pearlite is 5 μm or smaller; and the pearlite has an area fraction of 70% or greater with respect to the total area of the second phase.

摘要翻译： 具有优异成型性的高强度镀锌钢板包括在钢板表面上作为基材片和镀锌层的钢板，其中钢板是高强度钢板，其组成包括质量％ ，C：0.08〜0.15％，Si 0.5〜1.5％，P：0.1％以下，S：0.01％以下，Al：0.01〜0.1％，N：0.005％ 余量为Fe的不可避免的杂质，以铁素体相为75〜90％为主相的微观组织和至少包含至少珠光体的第二相为10〜25％ ; 珠光体的平均粒径为5μm以下; 并且珠光体相对于第二相的总面积的面积分数为70％以上。

公开(公告)号：US08389128B2

公开(公告)日：2013-03-05

申请号：US12595555

申请日：2008-04-07

申请人： Shusaku Takagi ,  Hidetaka Kawabe ,  Kohei Hasegawa ,  Toshihiko Ooi ,  Yasuaki Okita ,  Michitaka Sakurai

发明人： Shusaku Takagi ,  Hidetaka Kawabe ,  Kohei Hasegawa ,  Toshihiko Ooi ,  Yasuaki Okita ,  Michitaka Sakurai

IPC分类号： B32B15/01 ,  C21D8/02 ,  C22C38/22

CPC分类号： C23C2/06 ,  C21D6/005 ,  C21D8/0426 ,  C21D8/0473 ,  C21D8/0478 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/28 ,  Y10T428/12799

摘要： A high tensile-strength galvanized steel sheet includes C: at least 0.05% but less than 0.12%, Si: at least 0.01% but less than 0.35%, Mn: 2.0% to 3.5%, P: 0.001% to 0.020%, S: 0.0001% to 0.0030%, Al: 0.005% to 0.1%, N: 0.0001% to 0.0060%, Cr: more than 0.5% but not more than 2.0%, Mo: 0.01% to 0.50%, Ti: 0.010% to 0.080%, Nb: 0.010% to 0.080%, and B: 0.0001% to 0.0030%, the remainder being Fe and unavoidable impurities, wherein the high tensile-strength galvanized steel sheet has a microstructure that contains 20% to 70% by volume ferrite having an average grain size of 5 μm or less. The high tensile-strength galvanized steel sheet has a tensile strength of at least 980 MPa, and excellent formability and weldability.

摘要翻译： 高强度镀锌钢板包括C：0.05％以上且0.12％以下，Si：0.01％以上且0.35％以下，Mn：2.0％〜3.5％，P：0.001％以上0.020％以下，S： ：0.0001〜0.0030％，Al：0.005〜0.1％，N：0.0001〜0.0060％，Cr：0.5以上且2.0％以下，Mo：0.01〜0.50％，Ti：0.010〜0.080 ％，Nb：0.010％〜0.080％，B：0.0001〜0.0030％，余量为Fe和不可避免的杂质，其中，高强度镀锌钢板具有含有20〜70体积％ 平均粒径为5μm以下。 高强度热镀锌钢板的拉伸强度为980MPa以上，成形性和焊接性优异。

公开(公告)号：US20100132849A1

公开(公告)日：2010-06-03

申请号：US12595555

申请日：2008-04-07

申请人： Shusaku Takagi ,  Hidetaka Kawabe ,  Kohei Hasegawa ,  Toshihiko Ooi ,  Yasuaki Okita ,  Michitaka Sakurai

发明人： Shusaku Takagi ,  Hidetaka Kawabe ,  Kohei Hasegawa ,  Toshihiko Ooi ,  Yasuaki Okita ,  Michitaka Sakurai

IPC分类号： C23C2/28 ,  C22C38/00 ,  C22C38/32 ,  C22C38/22 ,  C22C38/38

CPC分类号： C23C2/06 ,  C21D6/005 ,  C21D8/0426 ,  C21D8/0473 ,  C21D8/0478 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/02 ,  C23C2/28 ,  Y10T428/12799

摘要： A high tensile-strength galvanized steel sheet includes C: at least 0.05% but less than 0.12%, Si: at least 0.01% but less than 0.35%, Mn: 2.0% to 3.5%, P: 0.001% to 0.020%, S: 0.0001% to 0.0030%, Al: 0.005% to 0.1%, N: 0.0001% to 0.0060%, Cr: more than 0.5% but not more than 2.0%, Mo: 0.01% to 0.50%, Ti: 0.010% to 0.080%, Nb: 0.010% to 0.080%, and B: 0.0001% to 0.0030%, the remainder being Fe and unavoidable impurities, wherein the high tensile-strength galvanized steel sheet has a microstructure that contains 20% to 70% by volume ferrite having an average grain size of 5 μm or less. The high tensile-strength galvanized steel sheet has a tensile strength of at least 980 MPa, and excellent formability and weldability.

摘要翻译： 高强度镀锌钢板包括C：0.05％以上且0.12％以下，Si：0.01％以上且0.35％以下，Mn：2.0％〜3.5％，P：0.001％以上0.020％以下，S： ：0.0001〜0.0030％，Al：0.005〜0.1％，N：0.0001〜0.0060％，Cr：0.5以上且2.0％以下，Mo：0.01〜0.50％，Ti：0.010〜0.080 ％，Nb：0.010％〜0.080％，B：0.0001〜0.0030％，余量为Fe和不可避免的杂质，其中，高强度镀锌钢板具有含有20〜70体积％ 平均粒径为5μm以下。 高强度热镀锌钢板的拉伸强度为980MPa以上，成形性和焊接性优异。