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：US20060096678A1

公开(公告)日：2006-05-11

申请号：US10543489

申请日：2004-04-21

申请人： Nobusuke Kariya

发明人： Nobusuke Kariya

IPC分类号： C22C38/12 ,  C22C38/14

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： The present invention relates to a high strength hot rolled steel sheet consisting of 0.04 to 0.15% C, 1.5% or less Si, 0.5 to 1.6% Mn, 0.04% or less P, 0.005% or less S, 0.04% or less Al, 0.03 to 0.15% Ti, 0.03 to 0.5% Mo, by mass, and balance of Fe and inevitable impurities, and having a microstructure consisting of ferrite containing precipitates, second phase of bainite and/or martensite, and other phase, wherein the percentage of the ferrite containing precipitates is 40 to 95%, and the percentage of the other phase is 5% or less. For example, the high strength hot rolled steel sheet having a thickness of 1.4 mm shows a tensile strength of 780 MPa or higher, an elongation of 22% or higher elongation, and a hole expansion ratio of 60% or higher, thus the steel sheetis suitable for reinforcing members automobile cabin and crash worthiness members of automobile.

摘要翻译： 本发明涉及由0.04〜0.15％C，1.5％以下的Si，0.5〜1.6％的Mn，0.04％以下的P，0.005％以下的S，0.04％以下的Al， 0.03〜0.15％的Ti，0.03〜0.5％的Mo，余量的Fe和不可避免的杂质，并且具有由含有析出物的铁素体，贝氏体和/或马氏体的第二相以及其他相组成的组织，其中， 含铁素体的析出物为40〜95％，另一相的比例为5％以下。 例如，厚度为1.4mm的高强度热轧钢板的拉伸强度为780MPa以上，伸长率为22％以上，扩孔率为60％以上，因此钢板 适合加固汽车客舱和汽车碰撞成员。

公开(公告)号：US10337094B2

公开(公告)日：2019-07-02

申请号：US14131957

申请日：2012-08-01

申请人： Nobusuke Kariya ,  Shinjiro Kaneko ,  Yasunobu Nagataki

发明人： Nobusuke Kariya ,  Shinjiro Kaneko ,  Yasunobu Nagataki

IPC分类号： B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02 ,  C23C2/06 ,  C23C2/02 ,  C22C18/00 ,  C22C18/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

摘要： Provided are a high-strength hot-dip galvanized steel sheet having excellent formability and a tensile strength of 440 MPa or more and a method for manufacturing the same. A steel sheet has a microstructure containing a ferrite phase having an area fraction of 60% or more, a pearlite phase having an area fraction of 20% to 30%, and a bainite phase having an area fraction of 1% to 5%, the area fraction of a cementite phase present in a grain of the ferrite phase being 5% or less. Upon manufacture, a hot-rolled sheet or a cold-rolled sheet is heated to a temperature of 650° C. or higher at an average heating rate of 10° C./s or more, is held at a temperature of 700° C. to (Ac3-5)° C. for ten seconds or more, is cooled to a temperature of 300° C. to 500° C. at an average cooling rate of 10° C./s to 200° C./s, is held at a temperature of 300° C. to 500° C. for 30 seconds to 300 seconds, and is then hot-dip galvanized.

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：US20140220383A1

公开(公告)日：2014-08-07

申请号：US14131957

申请日：2012-08-01

申请人： Nobusuke Kariya ,  Shinjiro Kaneko ,  Yasunobu Nagataki

发明人： Nobusuke Kariya ,  Shinjiro Kaneko ,  Yasunobu Nagataki

IPC分类号： C23C2/02 ,  C23C2/06

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C18/00 ,  C22C18/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/06 ,  Y10T428/12799

摘要： Provided are a high-strength hot-dip galvanized steel sheet having excellent formability and a tensile strength of 440 MPa or more and a method for manufacturing the same. A steel sheet has a microstructure containing a ferrite phase having an area fraction of 60% or more, a pearlite phase having an area fraction of 20% to 30%, and a bainite phase having an area fraction of 1% to 5%, the area fraction of a cementite phase present in a grain of the ferrite phase being 5% or less. Upon manufacture, a hot-rolled sheet or a cold-rolled sheet is heated to a temperature of 650° C. or higher at an average heating rate of 10° C./s or more, is held at a temperature of 700° C. to (Ac3-5)° C. for ten seconds or more, is cooled to a temperature of 300° C. to 500° C. at an average cooling rate of 10° C./s to 200° C./s, is held at a temperature of 300° C. to 500° C. for 30 seconds to 300 seconds, and is then hot-dip galvanized.

摘要翻译： 本发明提供一种成型性，拉伸强度为440MPa以上的高强度热浸镀锌钢板及其制造方法。 钢板具有含有面积率为60％以上的铁素体相，面积率为20％〜30％的珠光体相和面积分数为1％〜5％的贝氏体相的微结构， 存在于铁素体相的晶粒中的渗碳体相的面积率为5％以下。 制造时，将热轧板或冷轧板以平均加热速度10℃/ s以上加热到650℃以上的温度，保持在700℃ 至（Ac3-5）℃10秒以上，以10℃/秒至200℃/秒的平均冷却速度冷却至300℃至500℃的温度 在300〜500℃的温度下保持30秒〜300秒，然后进行热浸镀锌。

公开(公告)号：US08071018B2

公开(公告)日：2011-12-06

申请号：US12803232

申请日：2010-06-22

申请人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

发明人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

IPC分类号： C22C38/02 ,  C22C38/04

CPC分类号： C22C38/18 ,  C21D6/004 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/58

摘要： A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.03% or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 μm in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ΔHv (=Hv max−Hv min), in the sheet thickness direction being 10 or smaller.

摘要翻译： 作为热轧球墨退火材料的高碳热轧钢板，包含0.2〜0.7％的C，2％以下的Si，2％以下的Mn，0.03％以下的P，0.03％以下的S，0.08 ％以下的Sol.Al.和0.01质量％以下的N，其含有相对于碳化物总量的15体积％以下的粒径小于0.5μm的碳化物， 在最大硬度Hv max和最小硬度Hv min，＆Dgr; Hv（= Hv max-Hv min）之间的厚度方向为10以下。

公开(公告)号：US20090095382A1

公开(公告)日：2009-04-16

申请号：US11922158

申请日：2006-06-19

申请人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

发明人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

IPC分类号： C21D8/02

CPC分类号： C22C38/04 ,  C21D8/02 ,  C22C38/02

摘要： A high carbon cold-rolled steel sheet having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method having the steps of: hot-rolling a steel containing 0.2 to 0.7% C by mass at finishing temperatures of (Ar3 transformation point −20° C.) or above to prepare a hot-rolled sheet; cooling the hot-rolled sheet to temperatures of 650° C. or below at cooling rates from 60° C./s or larger to smaller than 120° C./s; coiling the hot-rolled sheet after cooling at coiling temperatures of 600° C. or below; cold-rolling the coiled hot-rolled sheet at rolling reductions of 30% or more to prepare a cold-rolled sheet; and annealing the cold-rolled sheet at annealing temperatures from 600° C. or larger to Ac1 transformation point or lower.

摘要翻译： 通过具有以下步骤的制造方法提供具有优异的拉伸凸缘成形性和优异的板厚方向上的硬度均匀性的高碳冷轧钢板：将含有0.2〜0.7质量％C的钢热轧在 （Ar3相变点-20℃）或以上的最终温度以制备热轧板; 将冷轧板以60℃/秒以上至小于120℃/秒的冷却速度将其冷却至650℃以下。 在600℃或更低的卷取温度下冷却后卷取热轧板; 将卷取的热轧板以30％以上的压下率进行冷轧，制作冷轧板; 并在退火温度为600℃以上至Ac1相变点以下退火冷轧板。

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：US08052812B2

公开(公告)日：2011-11-08

申请号：US11922158

申请日：2006-06-19

申请人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

发明人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

IPC分类号： C21D8/02 ,  C22C38/00

CPC分类号： C22C38/04 ,  C21D8/02 ,  C22C38/02

摘要： A high carbon cold-rolled steel sheet having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method having the steps of: hot-rolling a steel containing 0.2 to 0.7% C by mass at finishing temperatures of (Ar3 transformation point −20° C.) or above to prepare a hot-rolled sheet; cooling the hot-rolled sheet to temperatures of 650° C. or below at cooling rates from 60° C./s or larger to smaller than 120° C./s; coiling the hot-rolled sheet after cooling at coiling temperatures of 600° C. or below; cold-rolling the coiled hot-rolled sheet at rolling reductions of 30% or more to prepare a cold-rolled sheet; and annealing the cold-rolled sheet at annealing temperatures from 600° C. or larger to Ac1 transformation point or lower.

摘要翻译： 通过具有以下步骤的制造方法提供具有优异的拉伸凸缘成形性和优异的板厚方向上的硬度均匀性的高碳冷轧钢板：将含有0.2〜0.7质量％C的钢热轧在 （Ar3相变点-20℃）或以上的最终温度以制备热轧板; 将冷轧板以60℃/秒以上至小于120℃/秒的冷却速度将其冷却至650℃以下。 在600℃或更低的卷取温度下冷却后卷取热轧板; 将卷取的热轧板以30％以上的压下率进行冷轧，制作冷轧板; 并在退火温度为600℃以上至Ac1相变点以下退火冷轧板。

公开(公告)号：US20100266441A1

公开(公告)日：2010-10-21

申请号：US12803232

申请日：2010-06-22

申请人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

发明人： Nobusuke Kariya ,  Norio Kanamoto ,  Hidekazu Ookubo ,  Yoshiharu Kusumoto ,  Takeshi Fujita

IPC分类号： C22C38/16 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/18 ,  C22C38/08 ,  C22C38/14

CPC分类号： C22C38/18 ,  C21D6/004 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/58

摘要： A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.035 or less S, 0.08% or less Sol.Al., and 0.01% or less N, by mass, which contains carbide having a particle size of smaller than 0.5 μm in a content of 15% or less by volume to the total amount of carbide, and the difference between the maximum hardness Hv max and the minimum hardness Hv min, ΔHv (=Hv max−Hv min), in the sheet thickness direction being 10 or smaller.

摘要翻译： 含有0.2〜0.7％C，2％以下Si，2％以下Mn，0.03％以下P，0.035以下S，0.08％以上的热轧球墨退火材料的高碳热轧钢板， 或更少的Sol.Al.和0.01％或更小的N，其含有相对于碳化物的总量为15体积％以下的粒径小于0.5μm的碳化物，和 板厚方向的最大硬度Hvmax和最小硬度Hvmin，＆Dgr; Hv（= Hvmax-Hvmin）为10以下。