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1. 发明授权

US06511553B1 Steel for steel excellent in workability and method of deoxidizing same 有权
标题翻译：钢的加工性优异的钢板及其脱氧方法
公开(公告)号：US06511553B1
公开(公告)日：2003-01-28
申请号：US09403232
申请日：1999-10-15
申请人： Junji Nakashima , Takashi Sawai , Mitsuo Uchimura , Wataru Yamada , Shigenori Tanaka , Yasuharu Sakuma , Akinobu Murasato
发明人： Junji Nakashima , Takashi Sawai , Mitsuo Uchimura , Wataru Yamada , Shigenori Tanaka , Yasuharu Sakuma , Akinobu Murasato
IPC分类号： C22C3806
CPC分类号： C22C38/001 , C21C7/0006 , C21C7/06 , C22C38/04 , C22C38/14 , Y02P10/212
摘要： The present invention provides a steel for steel sheets excellent in workability and showing significantly decreased formation of surface defects, and a method of deoxidizing molten steel for the steel for steel sheets which prevents nozzle clogging during continuous-casting the molten steel. That is, the steel for steel sheets excellent in workability, comprises, based on weight, 0.0001 to 0.0030% of C, up to 0.03% of Si, 0.05 to 0.30% of Mn, up to 0.015% of P, 0.001 to 0.015% of S, up to 0.008% of Al, 0.02 to 0.08% of Ti, 0.0005 to 0.0020% of Ca, 0.0005 to 0.01% of N, optionally containing at least one of 0.001 to 0.02 wt % of Nb and 0.0001 to 0.0010 wt % of B, and the balance of Fe and unavoidable impurities. Moreover, the deoxidation method of the steel for steel sheets comprises properly adjusting addition amounts of Ca and Al as deoxidizing agents for the steel having the chemical composition mentioned above so that the chemical composition of the nonmetallic inclusions is controlled to prevent clogging of the casting nozzle.
摘要翻译：本发明提供一种加工性优异，表面缺陷形成显着降低的钢板用钢，以及钢水连续铸造时防止喷嘴堵塞的钢板钢的脱氧方法。也就是说，加工性优异的钢板用钢的重量为C：0.0001〜0.0030％，Si：0.03％以下，Mn：0.30〜0.30％，P：0.015％以下，0.001〜0.015％的S，至多0.008％的Al，0.02〜0.08％的Ti，0.0005〜0.0020％的Ca，0.0005〜0.01％的N，任选含有0.001〜0.02重量％的Nb和0.0001〜0.0010重量％的至少一种，的B，余量为Fe和不可避免的杂质。此外，钢板的钢的脱氧方法包括适当地调节Ca和Al的添加量作为具有上述化学组成的钢的脱氧剂，使得控制非金属夹杂物的化学组成以防止铸造喷嘴的堵塞。

2. 发明申请

US20120222781A1 HIGH STRENGTH STEEL PLATE WITH ULTIMATE TENSILE STRENGTH OF 900 MPa OR MORE EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE AND METHOD OF PRODUCTION OF SAME 有权
标题翻译：具有900MPa以上或更优异的氢腐蚀电阻的最终拉伸强度的高强度钢板及其制造方法
公开(公告)号：US20120222781A1
公开(公告)日：2012-09-06
申请号：US13508779
申请日：2010-11-30
申请人： Masafumi Azuma , Noriyuki Suzuki , Naoki Maruyama , Akinobu Murasato , Yasuharu Sakuma , Hiroyuki Kawata , Chisato Wakabayashi
发明人： Masafumi Azuma , Noriyuki Suzuki , Naoki Maruyama , Akinobu Murasato , Yasuharu Sakuma , Hiroyuki Kawata , Chisato Wakabayashi
IPC分类号： C21D8/00 , C22C38/04 , C22C38/02 , C22C38/16 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/00 , C22C38/06
CPC分类号： C23C2/06 , C21D9/46 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/28 , C23C2/40 , C25D5/36
摘要： High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a) by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×108 (particles/mm3) or more.
摘要翻译：具有900MPa以上的极限拉伸强度的高强度钢板，其耐氢脆性优异，其特征在于，在钢板的结构中，（a）以体积分数计，铁素体的含量为10〜50％，贝氏体铁素体和/或贝氏体为10〜60％，回火马氏体为10〜50％，（b）含有Si或Si和Al为0.1％以上的铁基碳化物存在于4×10 8（粒子/ mm 3 ）或者更多。

3. 发明授权

US10023947B2 High strength steel plate with ultimate tensile strength of 900 MPa or more excellent in hydrogen embrittlement resistance and method of production of same 有权
公开(公告)号：US10023947B2
公开(公告)日：2018-07-17
申请号：US13508779
申请日：2010-11-30
申请人： Masafumi Azuma , Noriyuki Suzuki , Naoki Maruyama , Akinobu Murasato , Yasuharu Sakuma , Hiroyuki Kawata , Chisato Wakabayashi
发明人： Masafumi Azuma , Noriyuki Suzuki , Naoki Maruyama , Akinobu Murasato , Yasuharu Sakuma , Hiroyuki Kawata , Chisato Wakabayashi
IPC分类号： C21D8/00 , C22C38/04 , C22C38/02 , C23C2/06 , C21D9/46 , C22C38/00 , C22C38/06 , C23C2/28 , C25D5/36 , C23C2/40
摘要： High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate, (a) by volume fraction, ferrite is present in 10 to 50%, bainitic ferrite and/or bainite in 10 to 60%, and tempered martensite in 10 to 50%, and (b) iron-based carbides which contain Si or Si and Al in 0.1% or more are present in 4×108 (particles/mm3) or more.

4. 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。

5. 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。

6. 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。

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

US07413780B2 High strength galvannealed steel sheet excellent in workability and a method of production of the same 有权
标题翻译：加工性优异的高强度合金化热镀锌钢板及其制造方法
公开(公告)号：US07413780B2
公开(公告)日：2008-08-19
申请号：US10540589
申请日：2002-12-26
申请人： Kazuhiko Honda , Masaharu Kameda , Yasuharu Sakuma , Akio Saito , Tetsuo Nishiyama , Atsushi Itami
发明人： Kazuhiko Honda , Masaharu Kameda , Yasuharu Sakuma , Akio Saito , Tetsuo Nishiyama , Atsushi Itami
IPC分类号： B21B27/00 , B21B27/06 , C22C38/00 , B05D1/18
CPC分类号： B32B15/013 , C21D8/0278 , C22C18/00 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/06 , C23C2/28 , Y10T29/301 , Y10T428/12799
摘要： Galvannealed steel sheet simultaneously able to achieve excellent workability and high strength and a method of production of the same are provided as an objective, in particular high strength galvannealed steel sheet excellent in workability, comprising high strength steel sheet containing, by mass %, C: 0.05 to 0.15%, Si: 0.3 to 2.0%, Mn: 1.0 to 2.8%, P: 0.03% or less, S: 0.02% or less, Al: 0.005 to 0.5%, and N: 0.0060% or less and a balance of Fe and unavoidable impurities, where, when % C, % Si, and % Mn respectively represent the C, Si, and Mn contents, (% Mn)/(% C)≧12 and (% Si)/(% C)≧4 being satisfied, on the surface of which having a galvannealed layer containing Al: 0.05 to 0.5 mass % and Fe: 5 to 15 mass % and a balance of Zn and unavoidable impurities, said steel sheet satisfying a relationship of tensile strength F (MPa) and elongation L (%) of L≧52−0.035×F.
摘要翻译：提供同时能够实现优异的加工性和高强度的加热冷却钢板及其制造方法，作为目的，特别是加工性优异的高强度合金化热浸镀锌钢板，包括以质量％计含有C： 0.05〜0.15％，Si：0.3〜2.0％，Mn：1.0〜2.8％，P：0.03％以下，S：0.02％以下，Al：0.005〜0.5％，N：0.0060％的Fe和不可避免的杂质，其中当％C，％Si和％Mn分别表示C，Si和Mn含量时，（％Mn）/（％C）> = 12和（％Si）/（％C ）> = 4，其表面具有含有Al：0.05〜0.5质量％的合金化热浸镀层，Fe：5〜15质量％，余量为Zn和不可避免的杂质，所述钢板满足拉伸强度 L> = 52-0.035×F的F（MPa）和伸长率L（％）。

9. 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。

10. 发明授权

US5855696A Ultra low carbon, cold rolled steel sheet and galvanized steel sheet having improved fatigue properties and processes for producing the same 失效
标题翻译：具有改善的疲劳特性的超低碳冷轧钢板和镀锌钢板及其制造方法
公开(公告)号：US5855696A
公开(公告)日：1999-01-05
申请号：US737909
申请日：1997-03-19
申请人： Makoto Tezuka , Kohsaku Ushioda , Shiro Fujii , Atsushi Itami , Yasuharu Sakuma , Tatsuo Yokoi
发明人： Makoto Tezuka , Kohsaku Ushioda , Shiro Fujii , Atsushi Itami , Yasuharu Sakuma , Tatsuo Yokoi
IPC分类号： C21D8/04 , C22C38/00 , C22C38/06 , C22C38/12 , C22C38/14 , C23C2/02 , C23C2/06 , C23C2/40 , C22C38/04
CPC分类号： C22C38/12 , C21D8/0436 , C22C38/001 , C22C38/06 , C22C38/14 , C23C2/02 , C23C2/06 , C23C2/40 , C21D8/0426 , C21D8/0473 , C21D8/0478
摘要： The cold rolled steel sheet or galvanized steel sheet comprises by weight C: 0.0001 to 0.0026%, Si: not more than 1.2%, Mn: 0.03 to 3.0%, P: 0.015 to 0.15%, S: 0.0010 to 0.020%, Al: 0.005 to 0.1%, N: 0.0005 to 0.0080% and B: 0.0003 to 0.0030% with the balance consisting of Fe and unavoidable impurities. A process for producing the above steel sheet is also provided which comprises the steps of: performing hot roll finishing of a slab having the above chemical composition at the Ar.sub.3 transformation point or above; preferably, then cooling the hot rolled strip, within 1.5 sec after the completion of the hot rolling, to 750.degree. C. at a rate of not less than 50.degree. C./sec; coiling the strip in the temperature range of from room temperature to 750.degree. C.; cold rolling the coiled strip a reduction ratio of not less than 70%; subjecting the cold rolled strip to continuous annealing at 600.degree. to 900.degree. C. or to continuous galvanizing by the sendzimer method; and performing temper rolling with a reduction ratio of not less than 1.5.times.(1-400.times.C) % and not less than 2080.times.(C - 0.0015) wherein C represents the carbon content in % by weight.
摘要翻译： PCT No.PCT / JP96 / 00805 Sec。 371日期1997年3月19日 102（e）1997年3月19日PCT PCT 1996年3月27日PCT公布。出版物WO96 / 30555 日期：1996年10月3日冷轧钢板或镀锌钢板以C：0.0001〜0.0026％，Si：1.2％以下，Mn：0.03〜3.0％，P：0.015〜0.15％，S：0.0010〜 0.020％，Al：0.005〜0.1％，N：0.0005〜0.0080％，B：0.0003〜0.0030％，余量由Fe和不可避免的杂质构成。还提供了一种生产上述钢板的方法，其包括以下步骤：在Ar 3相变点或更高温度下进行具有上述化学组成的板坯的热轧精加工; 优选在热轧结束后的1.5秒内将热轧带材冷却至750℃以上，不低于50℃/秒; 在室温至750℃的温度范围内卷取带材; 冷轧卷取钢带的减速比不小于70％; 使冷轧带材在600〜900℃下进行连续退火，或通过sendzimer法连续镀锌; 并且以不小于1.5×（1-400×℃）％且不小于2080×（C-0.0015）的还原率进行调质轧制，其中C表示碳含量以重量％计。

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