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1. 发明授权

US5618355A High-strength steel sheet suitable for deep drawing and process for producing the same 失效
标题翻译：适用于深冲的高强度钢板及其制造方法
公开(公告)号：US5618355A
公开(公告)日：1997-04-08
申请号：US556962
申请日：1995-12-12
申请人： Kazuo Koyama , Matsuo Usuda , Manabu Takahashi , Yasuharu Sakuma , Shunji Hiwatashi , Kaoru Kawasaki
发明人： Kazuo Koyama , Matsuo Usuda , Manabu Takahashi , Yasuharu Sakuma , Shunji Hiwatashi , Kaoru Kawasaki
IPC分类号： C21D1/18 , C21D1/20 , C21D8/04 , C22C38/02 , C22C38/06
CPC分类号： C21D1/185 , C21D8/04 , C22C38/02 , C22C38/06 , C21D1/20 , C21D2211/001 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C21D8/0426 , C21D8/0473
摘要： A high-strength steel sheet suitable for deep drawing, characterized by comprising 0.04 to 0.25 mass % of C and 0.3 to 3.0 mass %, in total, of at least one of Si and Al, the steel sheet having multiple phases structure comprising ferrite as a main phase (a phase having the highest volume fraction), not less than 3 vol. % of austenite, and bainite and martensite; said steel satisfying a requirement that a value obtained by dividing volume fraction of Vg (vol. %) of austenite before working by the content of C (mass %) contained in the whole steel, Vg/C, is 40 to 140, a requirement that Vp (volume fraction of austenite at the time of plane strain tensile deformation)/Vs (volume fraction of austenite at the time of shrink flanging deformation) is not more than 0.8, and a requirement represented by the formula220
摘要翻译： PCT No.PCT / JP95 / 00832 Sec。 371 1995年12月12日第 102（e）日期1995年12月12日PCT 1995年4月26日PCT PCT。 WO95 / 29268 PCT出版物日期：1995年11月2日适用于深拉深的高强度钢板，其特征在于，含有0.04〜0.25质量％的C和0.3〜3.0质量％的Si和Al中的至少一种，所述钢板具有多个包含铁素体作为主相（具有最高体积分数的相），不小于3体积％的相结构。％的奥氏体，贝氏体和马氏体; 所述钢满足以下要求：通过将在整个钢中含有的C（质量％）的含量Vg / C，将工作前奥氏体的Vg（体积％）的体积分数除以40〜140， Vp（平面应变拉伸变形时的奥氏体的体积分数）/ Vs（收缩凸缘变形时的奥氏体的体积分率）为0.8以下，由式220表示的要求

2. 发明授权

US08747577B2 High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same 有权
标题翻译：高屈服比和高强度薄钢板在焊接性和延展性方面优异，高产率高强度热浸镀锌薄板，高产率高强度热浸合金化热镀锌薄钢板，以及生产相同
公开(公告)号：US08747577B2
公开(公告)日：2014-06-10
申请号：US13134294
申请日：2011-06-03
申请人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
发明人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
IPC分类号： C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14
CPC分类号： C22C38/02 , C21D6/005 , C21D8/02 , C21D8/0278 , C21D9/46 , C22C38/04 , C22C38/12 , C23C2/02 , C23C2/26 , Y10T428/12799
摘要： High yield ratio high-strength hot rolled thin steel sheet superior in weldability and ductility comprising, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously satisfying 1.1≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised of iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×El1/2 of 3320 or more, an YR×TS×El1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
摘要翻译：可屈服性和延展性优异的高屈服比高强度热轧薄钢板，以质量％计含有C：0.030〜小于0.10％，Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜 0.02％，S：0.0001〜0.006％，Al：0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55％，B：0.0005 至0.0040％，同时满足1.1＆nlE; 14×Ti（％）+ 20×Nb（％）+ 3×Mo（％）+ 300×B（％）＆nlE; 3.7，余量由铁和不可避免的杂质构成，屈服比为0.64〜小于0.92，TS×El1 / 2为3320以上，YR×TS×El1 / 2为2320以上，最大拉伸强度（TS）为780MPa以上。

3. 发明申请

US20110232807A1 High yield ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same 有权
标题翻译：高屈服比和高强度薄钢板在焊接性和延展性方面优异，高产率高强度热浸镀锌薄板，高产率高强度热浸合金化热镀锌薄钢板，以及生产相同
公开(公告)号：US20110232807A1
公开(公告)日：2011-09-29
申请号：US13134294
申请日：2011-06-03
申请人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
发明人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
IPC分类号： C22C38/02
CPC分类号： C22C38/02 , C21D6/005 , C21D8/02 , C21D8/0278 , C21D9/46 , C22C38/04 , C22C38/12 , C23C2/02 , C23C2/26 , Y10T428/12799
摘要： High yield ratio high-strength thin steel sheet superior in weldability and ductility characterized by; being comprised of steel containing, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously statisfying 1.1≦4×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised of iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×El of 3320 or more, an YR×TS×El1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
摘要翻译：焊接性和延展性优异的高屈服比高强度薄钢板，由以质量％计含有C：0.030〜小于0.10％，Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜0.02％，S：0.0001〜0.006％的Al， 0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55％，B：0.0005〜0.0040％，同时排列1.1＆ Ti（％）+ 20×Nb（％）+ 3×Mo（％）+ 300×B（％）＆nlE; 3.7，余量由铁和不可避免的杂质构成，屈服比为0.64〜 TS×El为3320以上，YR×TS×El1 / 2为2320以上，最大拉伸强度（TS）为780MPa以上。

4. 发明授权

US08084143B2 High-yield-ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield-ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength hot-dip galvannealed thin steel sheet, and methods of production of same 有权
标题翻译：高屈服比和高强度薄钢板，其焊接性和延展性优良，高产率高强度热浸镀锌薄板，高产率高强度热浸合金化热镀锌薄钢板，以及生产方法相同
公开(公告)号：US08084143B2
公开(公告)日：2011-12-27
申请号：US10574053
申请日：2004-09-30
申请人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
发明人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
IPC分类号： C22C38/12 , C22C38/14
CPC分类号： C22C38/02 , C21D6/005 , C21D8/02 , C21D8/0278 , C21D9/46 , C22C38/04 , C22C38/12 , C23C2/02 , C23C2/26 , Y10T428/12799
摘要： High yield ratio high-strength thin steel sheet superior in weldability and ductility characterized by: being comprised of steel containing, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0.02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously satisfying 1.1 ≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised or iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×E11/2 of 3320 or more, an YR×TS×EL1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
摘要翻译：优异的可焊性和延展性的高屈服比高强度薄钢板，其特征在于：由以质量％计含有C：0.030以上且小于0.10％Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜0.02％，S：0.0001〜0.006％，Al：0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55 ％，B：0.0005〜0.0040％，同时满足1.1＆nlE; 14×Ti（％）+ 20×Nb（％）+ 3×Mo（％）+ 300×B（％）＆nlE; 3.7，铁和不可避免的杂质，其屈服比为0.64〜小于0.92，TS×E11 / 2为3320以上，YR×TS×EL1 / 2为2320以上，最大拉伸强度（TS）为 780MPa以上。

5. 发明申请

US20070029015A1 High-yield-ratio high-strength thin steel sheet and high-yield-ratio high-strength hot-dip galvanized thin steel sheet excelling in weldability and ductility as well as high-yield ratio high-strength alloyed hot-dip galvanized thin steel sheet and process for producing the same 有权
标题翻译：高屈服比高强度薄钢板和高屈服比高强度热浸镀锌薄钢板，具有优异的焊接性和延展性以及高产率高强度合金化热浸镀锌薄钢板及其制造方法
公开(公告)号：US20070029015A1
公开(公告)日：2007-02-08
申请号：US10574053
申请日：2004-09-30
申请人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
发明人： Naoki Yoshinaga , Shunji Hiwatashi , Yasuharu Sakuma , Atsushi Itami
IPC分类号： C22C38/00 , C23C2/06
CPC分类号： C22C38/02 , C21D6/005 , C21D8/02 , C21D8/0278 , C21D9/46 , C22C38/04 , C22C38/12 , C23C2/02 , C23C2/26 , Y10T428/12799
摘要： High yield ratio high-strength thin steel sheet D superior in weldability and ductility characterized by; being comprised of steel containing, by mass %, C: over 0.030 to less than 0.10%, Si: 0.30 to 0.80%, Mn: 1.7 to 3.2%, P: 0.001 to 0,02%, S: 0.0001 to 0.006%, Al: 0.060% or less, N: 0.0001 to 0.0070%, containing further c Ti: 0.01 to 0.055%, Nb: 0.012 to 0.055%, Mo: 0.07 to 0.55%, B: 0.0005 to 0.0040%, and simultaneously statisfying 1.1≦14×Ti(%)+20×Nb(%)+3×Mo(%)+300×B(%)≦3.7, the balance comprised of iron and unavoidable impurities, and having a yield ratio of 0.64 to less than 0.92, a TS×El of 3320 or more, an YR×TS×El1/2 of 2320 or more, and a maximum tensile strength (TS) of 780 MPa or more.
摘要翻译：高屈服比高强度薄钢板D具有优异的焊接性和延展性，其特征在于：由以质量％计含有C：0.030〜小于0.10％，Si：0.30〜0.80％，Mn：1.7〜3.2％，P：0.001〜0.02％，S：0.0001〜0.006％的钢， Al：0.060％以下，N：0.0001〜0.0070％，进一步含有Ti：0.01〜0.055％，Nb：0.012〜0.055％，Mo：0.07〜0.55％，B：0.0005〜0.0040％ = 14xTi（％）+ 20xNb（％）+ 3xMo（％）+ 300xB（％）<= 3.7，余量由铁和不可避免的杂质组成，屈服比为0.64至小于0.92，TSxE1为3320或更优选为2320以上的YRxTSxE1 / 2/2，最大拉伸强度（TS）为780MPa以上。

6. 发明授权

US6129992A High-strength cold rolled steel sheet and high-strength plated steel sheet possessing improved geomagnetic shielding properties and process for producing the same 失效
标题翻译：具有改善的地磁屏蔽性能的高强度冷轧钢板和高强度电镀钢板及其制造方法
公开(公告)号：US6129992A
公开(公告)日：2000-10-10
申请号：US348227
申请日：1999-07-06
申请人： Yasuharu Sakuma , Satoru Tanaka , Kazuo Koyama , Yujiro Miyauchi , Takeshi Kubota , Atsushi Itami , Hiroaki Kato , Chohachi Sato , Teruo Takeuchi
发明人： Yasuharu Sakuma , Satoru Tanaka , Kazuo Koyama , Yujiro Miyauchi , Takeshi Kubota , Atsushi Itami , Hiroaki Kato , Chohachi Sato , Teruo Takeuchi
IPC分类号： C21D8/02 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , H01F1/00
CPC分类号： C22C38/004 , C21D8/0236 , C21D8/1233 , C21D8/1277 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C21D8/1222 , C21D8/1272 , Y10S428/90 , Y10S428/928 , Y10S428/935 , Y10T428/12465 , Y10T428/12799 , Y10T428/12937 , Y10T428/12951
摘要： Provided are a high strength cold rolled steel sheet and a high strength plated steel sheet possessing improved geomagnetic shielding properties, that is, having a high relative permeability in a d.c. magnetic field around 0.3 Oe, a process for producing the same, and an explosion-proof band or an outer magnetic shielding material, for television cathode-ray tubes, using the steel sheet. An ultra low carbon steel, which has a carbon content of not more than 0.0060% and has been subjected to solid solution strengthening utilizing silicon and magnesium without relying upon precipitation strengthening, is deoxidized with silicon so that aluminum is substantially absent in the steel. Alternatively, when the ultra low carbon steel is deoxidized with aluminum, boron is added to inhibit the precipitation of AlN. Next, the deoxidized steel is finish rolled at 750 to 980.degree. C., cold rolled with a reduction ratio of 60 to 90%, and then annealed in the temperature range of 750.degree. C. to the Ac.sub.3 point in a continuous annealing equipment or an in-line annealing type continuous galvanizing equipment to bring the ferrite grain diameter in the metallographic structure to 10 to 200 .mu.m.
摘要翻译：本发明提供一种具有改善的地磁屏蔽性能的高强度冷轧钢板和高强度电镀钢板，即在直流电场中具有高的相对磁导率。约0.3Oe的磁场，其制造方法，以及使用该钢板的电视阴极射线管的防爆带或外部磁屏蔽材料。碳含量不大于0.0060％的超低碳钢，用硅和镁进行固溶强化而不依赖于析出强化，用硅进行脱氧，从而钢中基本上不存在铝。或者，当超低碳钢用铝脱氧时，加入硼以抑制AlN的沉淀。接着，将脱氧钢在750〜980℃精轧，以60〜90％的压下率进行冷轧，然后在连续退火设备中在750℃的温度范围内退火至Ac3点，在线退火型连续镀锌设备使金相组织中的铁素体晶粒直径达到10〜200μm。

7. 发明授权

US06319338B1 High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same 有权
标题翻译：具有高动态变形阻力的高强度钢板及其制造方法
公开(公告)号：US06319338B1
公开(公告)日：2001-11-20
申请号：US09308986
申请日：1999-07-06
申请人： Osamu Kawano , Yuzo Takahashi , Junichi Wakita , Hidesato Mabuchi , Manabu Takahashi , Akihiro Uenishi , Riki Okamoto , Yukihisa Kuriyama , Yasuharu Sakuma
发明人： Osamu Kawano , Yuzo Takahashi , Junichi Wakita , Hidesato Mabuchi , Manabu Takahashi , Akihiro Uenishi , Riki Okamoto , Yukihisa Kuriyama , Yasuharu Sakuma
IPC分类号： C22C3308
CPC分类号： C21D8/02 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel materials, to be used for shaping and working into such parts as front side members of automobiles which absorb impact energy upon collision, as well as a method for their production. The high-strength steel sheets of the invention which exhibit high impact energy absorption properties are high-strength steel sheets with high flow stress during dynamic deformation characterized in that the microstructure of the steel sheets in their final form is a composite microstructure of a mixture of ferrite and/or bainite, either of which is the dominant phase, and a third phase including retained austenite at a volume fraction between 3% and 50%, wherein the average value &sgr;dyn (MPa) of the flow stress in the range of 3˜10% of equivalent strain when deformed in a strain rate range of 5×102˜5×103 (1/sec) after pre-deformation of greater than 0% and less than or equal to 10% of equivalent strain, satisfies the inequality: &sgr;dyn≧0.766×TS+250 as expressed in terms of the maximum stress TS (MPa) in the static tensile test as measured in a strain rate range of 5×10−4˜5×10−3 (1/s) without deformation, and the work hardening coefficient between 1% and 5% of a strain is at least 0.080.
摘要翻译：本发明的目的是提供作为钢材的高冲击能量吸收性能的高强度钢板，用于成形和加工成在碰撞时吸收冲击能量的汽车前侧部件的部件，以及作为其生产方法。表现出高冲击能吸收性能的本发明的高强度钢板是在动态变形过程中具有高流动应力的高强度钢板，其特征在于，最终形式的钢板的微结构是复合组织，铁素体和/或贝氏体，其中任何一个是主要相，第三相包括体积分数在3％至50％之间的残余奥氏体，其中流动应力的平均值sigmadyn（MPa）在3〜在大于0％且小于等于等效应变的10％的预变形后，在5×102〜5×103（1 / sec）的应变速率范围内变形时的10％的当量应变满足以下不等式：sigmadyn> = 0.766 在静态拉伸试验中以5×10 -4〜5×10 -3（1 / s）的应变速度范围测定的无变形的最大应力TS（MPa）表示的xTS + 250，加工硬化系数1 ％和5％的菌株在leas t 0.080。

8. 发明授权

US06544354B1 High-strength steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof 有权
标题翻译：高强度钢板高度抗动态变形，加工性优良，制造方法优异
公开(公告)号：US06544354B1
公开(公告)日：2003-04-08
申请号：US09355435
申请日：1999-07-28
申请人： Osamu Kawano , Junichi Wakita , Yuzo Takahashi , Hidesato Mabuchi , Manabu Takahashi , Akihiro Uenishi , Yukihisa Kuriyama , Riki Okamoto , Yasuharu Sakuma
发明人： Osamu Kawano , Junichi Wakita , Yuzo Takahashi , Hidesato Mabuchi , Manabu Takahashi , Akihiro Uenishi , Yukihisa Kuriyama , Riki Okamoto , Yasuharu Sakuma
IPC分类号： C22C3804
CPC分类号： C21D8/0226 , C21D8/0426 , C21D8/0436 , C21D9/46 , C21D2211/001 , C21D2211/002 , C21D2211/005
摘要： The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel sheets to be used for shaping and working into such parts to front side members which absorb impact energy upon collision, as well as a method for their production. The high-strength steel sheets of the invention which exhibit high impact energy absorption properties are press formable high-strength steel sheets with high flow stress during dynamic deformation characterized in that the microstructure of the steel sheets in their final form is a composite microstructure of a mixture of ferrite and/or bainite, either of which is the dominant phase, and a third phase including retained austenite at a volume fraction between 3% and 50%, wherein the difference between the static tensile strength as when deformed in a strain rate range of 5×10−4˜5×10−3 (l/s) after pre-deformation at an equivalent strain of greater than 0% and less than or equal to 10%, and the dynamic tensile strength &sgr;d when deformed at a strain rate of 5×102˜5×103 (l/sec) after the pre-deformation, i.e. &sgr;d−&sgr;s, is at least 60 MPa, and the work hardening coefficient between 5% and 10% of a strain is at least 0.130.
摘要翻译：本发明的目的是提供一种表现出高冲击能吸收性能的高强度钢板，作为用于成形和加工成这些部件的钢板，该前端侧构件在碰撞时吸收冲击能量，以及方法为他们的生产。表现出高冲击能吸收性能的本发明的高强度钢板是动态变形时具有高流动应力的可压制高强度钢板，其特征在于，最终形式的钢板的微结构是铁素体和/或贝氏体的混合物，其中的任一种是主要相，第三相包括体积分数在3％至50％之间的残余奥氏体，其中在应变速率范围内变形时的静态拉伸强度之间的差异在大于0％且小于或等于10％的等效应变下预变形后为5×10 -4〜5×10 -3（1 / s），当应变速率为5×102〜在预变形之后的5×10 3（1 / sec），即Sigmad-sigmas，至少为60MPa，并且应变的5％和10％之间的加工硬化系数为至少0.130。

9. 发明授权

US08657970B2 Hot-rolled steel sheet excellent in fatigue properties and stretch-flange formability and method for manufacturing the same 有权
标题翻译：疲劳特性和拉伸凸缘成型性优异的热轧钢板及其制造方法
公开(公告)号：US08657970B2
公开(公告)日：2014-02-25
申请号：US12934039
申请日：2008-11-12
申请人： Naoki Yoshinaga , Masafumi Azuma , Yasuharu Sakuma , Naoki Maruyama
发明人： Naoki Yoshinaga , Masafumi Azuma , Yasuharu Sakuma , Naoki Maruyama
IPC分类号： C22C38/00 , C22C38/08 , C21D8/02 , C22C38/14
CPC分类号： C22C38/14 , C21D8/0426 , C21D8/0463 , C21D9/46 , C21D9/48 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/02 , C23C2/28
摘要： This hot-rolled steel sheet contains, in terms of mass %, C: 0.015% or more to less than 0.040%; Si: less than 0.05%; Mn: 0.9% or more to 1.8% or less; P: less than 0.02%; S: less than 0.01%; Al: less than 0.1%; N: less than 0.006%; and Ti: 0.05% or more to less than 0.11%, with the remainder being Fe and inevitable impurities, wherein Ti/C is in a range of 2.5 or more to less than 3.5, Nb, Zr, V, Cr, Mo, B and W are not included, a microstructure includes a mixed microstructure of polygonal ferrite and quasi-polygonal ferrite in a proportion of greater than 96%, a maximum tensile strength is 520 MPa or more and less than 720 MPa, an aging index AI is more than 15 MPa, a product of a hole expansion ratio (λ) % and a total elongation (El) % is 2350 or more, and a fatigue limit is 200 MPa or more.
摘要翻译：该热轧钢板以质量％计含有C：0.015％以上且小于0.040％ Si：小于0.05％; Mn：0.9％以上至1.8％以下; P：小于0.02％; S：小于0.01％; Al：小于0.1％; N：小于0.006％; 和Ti：0.05％以上至小于0.11％，其余为Fe和不可避免的杂质，其中Ti / C在2.5以上且小于3.5的范围内，Nb，Zr，V，Cr，Mo，B 并不包括W，微结构包括多数铁素体和准多边形铁素体的混合微结构，其比例大于96％，最大拉伸强度为520MPa以上且低于720MPa，老化指数AI更多超过15MPa时，孔膨胀率（λ）％和总伸长率（E1）％的乘积为2350以上，疲劳极限为200MPa以上。

10. 发明授权

US08163108B2 High-strength cold-rolled steel sheet, high-strength galvanized steel sheet, and high-strength alloyed hot-dip galvanized steel sheet having excellent formability and weldability, and methods for manufacturing the same 有权
标题翻译：高强度冷轧钢板，高强度镀锌钢板，成形性和焊接性优异的高强度合金化热浸镀锌钢板及其制造方法
公开(公告)号：US08163108B2
公开(公告)日：2012-04-24
申请号：US12736154
申请日：2009-03-26
申请人： Masafumi Azuma , Naoki Yoshinaga , Naoki Maruyama , Noriyuki Suzuki , Yasuharu Sakuma
发明人： Masafumi Azuma , Naoki Yoshinaga , Naoki Maruyama , Noriyuki Suzuki , Yasuharu Sakuma
IPC分类号： C22C38/00 , C22C38/18 , C22C38/04 , C22C38/14
CPC分类号： C22C38/32 , C21D8/0226 , C21D8/04 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/002 , C22C38/02 , C22C38/28 , C22C38/38 , C23C2/02 , C23C2/04 , C23C2/26 , C23C2/28 , Y10T428/12799
摘要： This cold-rolled steel sheet includes, in terms of mass %, C: not less than 0.05% and not more than 0.095%, Cr: not less than 0.15% and not more than 2.0%, B: not less than 0.0003% and not more than 0.01%, Si: not less than 0.3% and not more than 2.0%, Mn: not less than 1.7% and not more than 2.6%, Ti: not less than 0.005% and not more than 0.14%, P: not more than 0.03%, S: not more than 0.01%, Al: not more than 0.1%, N: less than 0.005%, O: not less than 0.0005% and not more than 0.005%, and contains as the remainder, iron and unavoidable impurities, wherein the microstructure of the steel sheet includes mainly polygonal ferrite having a crystal grain size of not more than 4 μm, and hard microstructures of bainite and martensite, the block size of the martensite is not more than 0.9 μm, the Cr content within the martensite is 1.1 to 1.5 times the Cr content within the polygonal ferrite, and the tensile strength is at least 880 MPa.
摘要翻译：该冷轧钢板以质量％计含有C：0.05％以上0.095％以下的Cr：0.15％以上2.0％以下，B：0.0003％以上， 0.01％以下，Si：0.3％以上2.0％以下，Mn：1.7％以上2.6％以下，Ti：0.005％以上0.14％以下，P：不大于0.03％，S：不大于0.01％，Al：不大于0.1％，N：小于0.005％，O：不小于0.0005％，不大于0.005％，其余为铁和不可避免的杂质，其中钢板的组织主要包括晶粒尺寸不大于4μm的多边形铁素体，贝氏体和马氏体的硬质组织，马氏体的块尺寸不大于0.9μm，Cr 马氏体内的含量为多边形铁素体中的Cr含量的1.1〜1.5倍，拉伸强度为880MPa以上。

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