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1. 发明授权

US07527700B2 High strength hot rolled steel sheet and method for manufacturing the same 有权
标题翻译：高强度热轧钢板及其制造方法
公开(公告)号：US07527700B2
公开(公告)日：2009-05-05
申请号：US10543489
申请日：2004-04-21
申请人： Nobusuke Kariya , Shusaku Takagi , Tetsuo Shimizu , Tetsuya Mega , Kei Sakata , Hiroshi Takahashi
发明人： Nobusuke Kariya , Shusaku Takagi , Tetsuo Shimizu , Tetsuya Mega , Kei Sakata , Hiroshi Takahashi
IPC分类号： C22C38/00
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 sheet is 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，延伸率为22％以上，扩孔率为60％以上，因此钢板适用于加固汽车客舱和汽车碰撞成员。

2. 发明授权

US07485194B2 High tensile hot-rolled steel sheet excellent in resistance to scuff on mold and in fatigue characteristics 有权
标题翻译：高耐热热轧钢板耐模具耐磨性和疲劳特性
公开(公告)号：US07485194B2
公开(公告)日：2009-02-03
申请号：US10479637
申请日：2002-05-23
申请人： Tetsuya Mega , Kei Sakata
发明人： Tetsuya Mega , Kei Sakata
IPC分类号： C22C38/02 , C22C38/04 , C22C38/12
CPC分类号： C21D8/0226 , C21D8/0263 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12
摘要： This disclosure proposes a high-strength hot rolled steel sheet having excellent anti-die-galling property and anti-fatigue property, in which the steel sheet has a composition including C: not less than 0.02 mass % but not more than 0.2 mass %, Si: not less than 0.2 mass % but not more than 1.2 mass %, Mn: not less than 1.0 mass % but not more than 3.0 mass %, Mo: not less than 0.1 mass % but not more than 1.0 mass %, Al: not less than 0.01 mass % but not more than 0.1 mass %, P: not more than 0.03 mass % S: not more than 0.01 mass % and the remainder being substantially Fe and inevitable impurities, and has a steel microstructure containing not less than 55 vol % of ferrite and not less than 10 vol % but not more than 40 vol % of martensite provided that a total of both is not less than 95 vol %, and a ratio ds/dc of an average crystal grain size ds of the ferrite in a surface layer portion of the steel sheet to an average crystal grain size dc of the ferrite in a center portion of the steel sheet is 0.3
摘要翻译：本公开内容提出了具有优异的抗模具磨损性和抗疲劳性的高强度热轧钢板，其中钢板具有包括C：0.02质量％以上且0.2质量％以下的组成， Si：0.2质量％以上且1.2质量％以下，Mn：1.0质量％以上3.0质量％以下，Mo：0.1质量％以上且1.0质量％以下，Al： 0.01质量％以上且0.1质量％以下，P：0.03质量％以下S：0.01质量％以下，余量基本上为Fe及不可避免的杂质，具有不小于55的钢组织铁素体的体积％，并且不小于10体积％但不大于40体积％的马氏体，只要两者的总和不小于95体积％，并且铁氧体的平均晶粒尺寸ds的ds / dc比在钢板的表层部分中的铁素体的平均晶粒直径dc在t的中心部分钢板为0.3

3. 发明授权

US07347902B2 High tensile hot rolled steel sheet excellent in shape freezing property and endurance fatigue characteristics after forming 有权
标题翻译：成形后的冷冻性和耐疲劳特性优异的高强度热轧钢板
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
IPC分类号： C22C38/06 , C22C38/04
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。

4. 发明申请

US20050019601A1 High-ductility steel sheet excellent in press formability and strain age hardenability, and method for manufacturing the same 审中-公开
标题翻译：压制成形性和应变时效淬透性优异的高延展性钢板及其制造方法
公开(公告)号：US20050019601A1
公开(公告)日：2005-01-27
申请号：US10909049
申请日：2004-07-30
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C22C38/00 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/16 , C23C2/02 , C23C2/28 , B32B15/00
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C22C38/04 , C22C38/12 , C22C38/16 , C23C2/02 , C23C2/28 , Y10T428/12799
摘要： A steel sheet composition contains appropriate amounts of C, Si, Mn, P, S, Al and N and 0.5 to 3.0% Cu. A composite structure of the steel sheet has a ferrite phase or a ferrite phase and a tempered martensite phase as a primary phase, and a secondary phase containing retained austenite in a volume ratio of not less than 1%. In place of the Cu, at least one of Mo, Cr, and W may be contained in a total amount of not more than 2.0%. This composition is useful in production of a high-ductility hot-rolled steel sheet, a high-ductility cold-rolled steel sheet and a high-ductility hot-dip galvanized steel sheet having excellent press formability and excellent stain age hardenability as represented by a ΔTS of not less than 80 MPa, in which the tensile strength increases remarkably through a heat treatment at a relatively low temperature after press forming.
摘要翻译：钢板组合物含有适量的C，Si，Mn，P，S，Al和N以及0.5〜3.0％的Cu。钢板的复合结构具有铁素体相或铁素体相，回火马氏体相作为主相，第二相含有体积比为1％以上的残留奥氏体。代替Cu，Mo，Cr和W中的至少一种可以含有不超过2.0％的总量。该组合物可用于生产高延展性热轧钢板，高延展性冷轧钢板和高延展性热浸镀锌钢板，其具有优异的压制成形性和优异的耐老化淬透性，如通过压制成形后的较低温度下的热处理，拉伸强度不大于80MPa的ΔTS值。

5. 发明申请

US20050016644A1 High-ductility steel sheet excellent in press formability and strain age hardenability, and method for manufacturing the same 审中-公开
公开(公告)号：US20050016644A1
公开(公告)日：2005-01-27
申请号：US10903747
申请日：2004-07-30
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C22C38/00 , C21D8/02 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/16 , C23C2/02 , C23C2/28 , C21D8/00
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C22C38/04 , C22C38/12 , C22C38/16 , C23C2/02 , C23C2/28 , Y10T428/12799
摘要： A steel sheet composition contains appropriate amounts of C, Si, Mn, P, S, Al and N and 0.5 to 3.0% Cu. A composite structure of the steel sheet has a ferrite phase or a ferrite phase and a tempered martensite phase as a primary phase, and a secondary phase containing retained austenite in a volume ratio of not less than 1%. In place of the Cu, at least one of Mo, Cr, and W may be contained in a total amount of not more than 2.0%. This composition is useful in production of a high-ductility hot-rolled steel sheet, a high-ductility cold-rolled steel sheet and a high-ductility hot-dip galvanized steel sheet having excellent press formability and excellent stain age hardenability as represented by a ΔTS of not less than 80 MPa, in which the tensile strength increases remarkably through a heat treatment at a relatively low temperature after press forming.

6. 发明授权

US06814819B2 Methods of manufacturing hot-dip galvanized hot-rolled and cold-rolled steel sheets excellent in strain age hardening property 有权
标题翻译：制造应变时效硬化性优异的热镀锌热轧和冷轧钢板的制造方法
公开(公告)号：US06814819B2
公开(公告)日：2004-11-09
申请号：US10428881
申请日：2003-05-02
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C21D802
CPC分类号： C22C38/16 , C21D1/185 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/02 , C23C2/06 , C23C2/40 , Y10T428/12799
摘要： The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, Al and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and having a composite structure comprising ferrite and martensite having an area ratio of 2% or more. The steel sheet is in the form of a high-strength hot-rolled steel sheet, a high-strength cold-rolled steel sheet, or a hot-dip galvanized steel sheet. There is thus available a steel sheet excellent in press-formability and in strain age hardening property as represented by a &Dgr;TS of 80 MPa or more.
摘要翻译：本发明提供一种钢板，其特征在于，含有0.15％以下的C，2.0％以下的Si，3.0％以下的Mn，P，S，Al，N以及0.5〜3.0％的Cu，或更多的Cr，Mo和W的总量为2.0％以下，并且具有包含面积比为2％以上的铁素体和马氏体的复合结构。钢板为高强度热轧钢板，高强度冷轧钢板或热浸镀锌钢板的形式。因此可获得如DeltaTS为80MPa以上的压制成形性和应变时效硬化性优异的钢板。

7. 发明授权

US07396420B2 Hot-dip galvanized hot-rolled and cold-rolled steel sheets excellent in strain age hardening property 有权
标题翻译：热浸镀锌热轧和冷轧钢板，应变时效硬化性优异
公开(公告)号：US07396420B2
公开(公告)日：2008-07-08
申请号：US10429018
申请日：2003-05-02
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C22C38/12
CPC分类号： C22C38/16 , C21D1/185 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/02 , C23C2/06 , C23C2/40 , Y10T428/12799
摘要： The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, A1 and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and having a composite structure comprising ferrite and martensite having an area ratio of 2% or more. The steel sheet is in the form of a high-strength hot-rolled steel sheet, a high-strength cold-rolled steel sheet, or a hot-dip galvanized steel sheet. There is thus available a steel sheet excellent in press-formability and in strain age hardening property as represented by a ΔTS of 80 MPa or more.
摘要翻译：本发明提供一种钢板，其特征在于，具有C：0.15％以下的Si，2.0％以下的Si，3.0％以下的Mn，P，S，Al，N，Cu：0.5〜3.0％或更多的Cr，Mo和W的总量为2.0％以下，并且具有包含面积比为2％以上的铁素体和马氏体的复合结构。钢板为高强度热轧钢板，高强度冷轧钢板或热浸镀锌钢板的形式。因此可获得如DeltaTS为80MPa以上的压制成形性和应变时效硬化性优异的钢板。

8. 发明授权

US06818074B2 High-ductility steel sheet excellent in press formability and strain age hardenability, and method for manufacturing the same 失效
标题翻译：压制成形性和应变时效淬透性优异的高延展性钢板及其制造方法
公开(公告)号：US06818074B2
公开(公告)日：2004-11-16
申请号：US10163728
申请日：2002-06-06
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C22C3802
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C22C38/04 , C22C38/12 , C22C38/16 , C23C2/02 , C23C2/28 , Y10T428/12799
摘要： A steel sheet composition contains appropriate amounts of C, Si, Mn, P, S, Al and N and 0.5 to 3.0% Cu. A composite structure of the steel sheet has a ferrite phase or a ferrite phase and a tempered martensite phase as a primary phase, and a secondary phase containing retained austenite in a volume ratio of not less than 1%. In place of the Cu, at least one of Mo, Cr, and W may be contained in a total amount of not more than 2.0%. This composition is useful in production of a high-ductility hot-rolled steel sheet, a high-ductility cold-rolled steel sheet and a high-ductility hot-dip galvanized steel sheet having excellent press formability and excellent stain age hardenability as represented by a &Dgr;TS of not less than 80 MPa, in which the tensile strength increases remarkably through a heat treatment at a relatively low temperature after press forming.
摘要翻译：钢板组合物含有适量的C，Si，Mn，P，S，Al和N以及0.5〜3.0％的Cu。钢板的复合结构具有铁素体相或铁素体相，回火马氏体相作为主相，第二相含有体积比为1％以上的残留奥氏体。代替Cu，Mo，Cr和W中的至少一种可以含有不超过2.0％的总量。该组合物可用于生产高延展性热轧钢板，高延展性冷轧钢板和高延展性热浸镀锌钢板，其具有优异的压制成形性和优异的耐老化淬透性，如通过压制成形后的较低温度下的热处理，拉伸强度不大于80MPa的ΔTS值。

9. 发明授权

US06676774B2 Hot rolled steel plate and cold rolled steel plate being excellent in strain aging hardening characteristics 有权
标题翻译：热轧钢板和冷轧钢板的应变时效硬化特性优异
公开(公告)号：US06676774B2
公开(公告)日：2004-01-13
申请号：US09980300
申请日：2001-12-31
申请人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
发明人： Saiji Matsuoka , Tetsuo Shimizu , Kei Sakata , Osamu Furukimi
IPC分类号： C22C3816
CPC分类号： C22C38/16 , C21D1/185 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/02 , C23C2/06 , C23C2/40 , Y10T428/12799
摘要： The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, Al and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and having a composite structure comprising ferrite and martensite having an area ratio of 2% or more. The steel sheet is in the form of a high-strength hot-rolled steel sheet, a high-strength cold-rolled steel sheet, or a hot-dip galvanized steel sheet. There is thus available a steel sheet excellent in press-formability and in strain age hardening property as represented by a &Dgr;TS of 80 MPa or more.
摘要翻译：本发明提供一种钢板，其特征在于，含有0.15％以下的C，2.0％以下的Si，3.0％以下的Mn，P，S，Al，N以及0.5〜3.0％的Cu，或更多的Cr，Mo和W的总量为2.0％以下，并且具有包含面积比为2％以上的铁素体和马氏体的复合结构。钢板为高强度热轧钢板，高强度冷轧钢板或热浸镀锌钢板的形式。因此可获得如DeltaTS为80MPa以上的压制成形性和应变时效硬化性优异的钢板。

10. 发明授权

US08747578B2 Steel for structural part of automobile and method for producing the same 有权
标题翻译：汽车结构部件用钢及其制造方法
公开(公告)号：US08747578B2
公开(公告)日：2014-06-10
申请号：US10582717
申请日：2004-12-09
申请人： Shunsuke Toyoda , Kei Sakata , Akio Sato , Kouichi Kaneko , Hiroshi Kawaguchi
发明人： Shunsuke Toyoda , Kei Sakata , Akio Sato , Kouichi Kaneko , Hiroshi Kawaguchi
IPC分类号： C22C38/44
CPC分类号： C22C38/02 , C21D8/0226 , C21D8/10 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38
摘要： A steel having excellent formability, fatigue endurance after quenching, low temperature toughness, resistance for hydrogen embrittlement, and corrosion fatigue endurance. A method includes heating a steel slab at 1160° C. to 1320° C., hot-finish-rolling the steel slab at a finisher delivery temperature of 750° C. to 980° C., and then coiling the hot-rolled steel at a coiling temperature of 560° C. to 740° C. after slow cooling for a time of 2 seconds or more to produce a hot-rolled steel strip having a structure in which the ferrite grain diameter df corresponding to a circle is 1.1 μm to less than 1.2 μm and the ferrite volume fraction Vf is 30% to 98%, the steel slab containing 0.18 to 0.29% of C, 0.06 to 0.45% of Si, 0.91 to 1.85% of Mn, 0.019% or less of P, 0.0029% or less of S, 0.015 to 0.075% of sol. Al, 0.0049% or less of N, 0.0049% or less of O, 0.0001 to 0.0029% of B, 0.001 to 0.019% of Nb, 0.001 to 0.029% of Ti, 0.001 to 0.195% of Cr, and 0.001 to 0.195% of Mo so that the carbon equivalent Ceq satisfies a value of 0.4 to less than 0.58, and the total x of multiplying factors including that for B according to Grossmann satisfies a value of 1.2 to less than 1.7.
摘要翻译：具有优异的成形性，淬火后疲劳耐久性，低温韧性，耐氢脆性和耐腐蚀疲劳耐久性的钢。一种方法包括将钢坯在1160℃加热至1320℃，在750℃至980℃的整理器输送温度下对钢坯进行热精轧，然后卷取热轧钢在缓慢冷却2秒钟以上的卷取温度为560℃〜740℃的条件下，制造出具有如下结构的热轧钢带，其中，相当于圆的铁素体晶粒直径df为1.1μm 小于1.2μm，铁素体体积分率Vf为30〜98％，含有0.18〜0.29％的C，0.06〜0.45％的Si，0.91〜1.85％的Mn，0.019％以下的P， 0.0029％以下的S，0.015〜0.075％的溶胶。 Al：0.0049％以下，○0.0049％以下，B：0.0001〜0.0029％，Nb：0.001〜0.019％，Ti：0.001〜0.029％，Cr：0.001〜0.195％，以及0.001〜0.195％ Mo使得碳当量Ceq满足0.4至小于0.58的值，并且包括根据Grossmann的乘积因子的总和x满足1.2至小于1.7的值。

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