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1. 发明授权

US5542994A Method for manufacturing a high-formable, high-strength cold-rolled steel sheet excellent in resistance to secondary working embrittlement 失效
标题翻译：制造耐二次加工脆性优异的高成形，高强度冷轧钢板的方法
公开(公告)号：US5542994A
公开(公告)日：1996-08-06
申请号：US363365
申请日：1994-12-23
申请人： Kazuhiro Seto , Kaneharu Okuda , Kei Sakata , Toshiyuki Kato , Takashi Ono
发明人： Kazuhiro Seto , Kaneharu Okuda , Kei Sakata , Toshiyuki Kato , Takashi Ono
IPC分类号： C21D1/18 , C21D1/26 , C21D8/04 , C21D9/46 , C21D9/48 , C22C38/00 , C22C38/16 , C21D8/02
CPC分类号： C21D9/48 , C21D8/0426 , C21D1/185 , C21D1/26 , C21D2211/00 , C21D2211/005 , C21D8/0473
摘要： A method of producing a high-formable, high-strength cold-rolled steel sheet from a steel slab comprising a steel with very low carbon content, one or both of Ti and Nb as a composition for forming a carbide or a nitride, and B in the range satisfying the following expression:0.001 A.ltoreq.B (wt %).ltoreq.0.003 Awherein A is a parameter determined approximately by the following expression with reference to the relation:A=P (wt %)+0.2 Mn (wt %)+0.8 Si (wt %)-0.2, subjecting the steel to a hot rolling so as to finish at a temperature between about Ar.sub.3 transformation temperature and about Ar.sub.3 transformation temperature +100 C.degree.. Thereafter, the steel is successively subjected to coiling, cold-rolling and, then, continuous annealing at temperatures between Ac.sub.1 transformation temperature +5 C.degree. and Ac.sub.1 transformation temperature +50 C.degree., and not lower than 860 C.degree.. Thus, a volume percentage of a low temperature transformation phase is controlled within the range of about 5 to about 50%, thereby obtaining a high strength cold-rolled steel sheet having a tensile strength of 38 kgf/mm.sup.2 or more, plus excellent formability and resistance to secondary working embrittlement.
摘要翻译：作为用于形成碳化物或氮化物的组合物，由含有碳含量非常低的钢，Ti和Nb中的一种或两种的钢坯制造高成形性高强度冷轧钢板的方法，以及B 在满足以下表达式的范围内：0.001A

2. 发明授权

US5882803A High-strength hot dip galvannealed steel sheets having excellent plating properties and method of producing the same 失效
标题翻译：具有优异电镀性能的高强度热浸镀锌合金化钢板及其制造方法
公开(公告)号：US5882803A
公开(公告)日：1999-03-16
申请号：US525686
申请日：1995-09-28
申请人： Kazuhiro Seto , Kei Sakata , Toshiyuki Kato , Shigeru Umino , Chiaki Kato
发明人： Kazuhiro Seto , Kei Sakata , Toshiyuki Kato , Shigeru Umino , Chiaki Kato
IPC分类号： B32B15/01 , C23C2/28 , B32B15/18 , C21D1/00 , C22C38/00
CPC分类号： B32B15/013 , C23C2/28 , Y10T428/12799 , Y10T428/12951
摘要： The invention is a high-strength hot dip galvannealed steel sheet having excellent press formability and plating properties by utilizing Si as a strengthening component, specifying an interrelation between Si and Mn and further specifying an alloying ratio of hot dip galvannealed layer, which comprises C: 0.0005-0.0050%, Si: 0.1-2.5%, Mn: 0.1-2.5%, Ti: 0.003-010%, Nb: 0.003-0.10%, B: 0.005-0.0080%, P: 0.040-0.18%, S: not more than 0.008%, Al: 0.005-0.10%, and N: not more than 0.0060 wt %, provided that Si and Mn satisfy the following equation, and the remainder being Fe and incidental impurities, and has a hot dip galvannealed layer formed on a surface of the steel sheet and having a Fe content of 9-12%, wherein said equation is:1.5 (% Mn)-2.ltoreq.(% Si).ltoreq.2(% Mn) (1).
摘要翻译： PCT No.PCT / JP95 / 00196 Sec。 371 1995年9月28日第 102（e）1995年9月28日PCT PCT 1995年2月13日提交PCT公布。第WO95 / 21947号公报日期：1995年8月17日本发明是通过利用Si作为强化成分，具有优异的压制成形性和电镀性的高强度热浸镀锌钢板，指定Si与Mn之间的相互关系，进一步确定热浸镀锌合金层的合金化比例，其包含C：0.0005-0.0050％，Si：0.1-2.5％，Mn：0.1-2.5％，Ti：0.003-0.10％，Nb：0.003-0.10％，B：0.005-0.0080％，P：0.040-0.18 ％，S：不大于0.008％，Al：0.005-0.10％，N：不大于0.0060重量％，条件是Si和Mn满足下列等式，其余为Fe和杂质，并且具有热在钢板表面上形成的Fe含量为9〜12％的浸渍合金化热浸镀层，其中所述方程式为：1.5（％Mn）-2（％Si）≤2（％Mn） 1）。

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. 发明授权

US06638371B1 Cold-rolled steel sheet having ultrafine grain structure and method for manufacturing the same 有权
标题翻译：具有超细晶粒结构的冷轧钢板及其制造方法
公开(公告)号：US06638371B1
公开(公告)日：2003-10-28
申请号：US10389912
申请日：2003-03-18
申请人： Tetsuo Mochida , Kazuhiro Seto , Kei Sakata , Tomohisa Oonishi
发明人： Tetsuo Mochida , Kazuhiro Seto , Kei Sakata , Tomohisa Oonishi
IPC分类号： C21D800
CPC分类号： C22C38/04 , C21D8/02 , C21D8/0273 , C21D2211/005 , C22C38/08 , C22C38/12 , C22C38/14
摘要： A cold-rolled steel sheet having an ultrafine grain structure including a ferrite phase provided. The cold-rolled steel sheet contains C, Si, Mn, Ni, Ti, Nb, Al, P, S, N and Fe and incidental impurities. The ferrite phase has a content of 65 percent by volume or more and an average grain size of 3.5 &mgr;m or less.
摘要翻译：一种具有提供铁素体相的超细晶粒结构的冷轧钢板。冷轧钢板含有C，Si，Mn，Ni，Ti，Nb，Al，P，S，N和Fe以及附带的杂质。铁素体相的含量为65体积％以上，平均粒径为3.5μm以下。

5. 发明授权

US5853503A Hot rolled steel sheets and method of producing the same 失效
标题翻译：热轧钢板及其制造方法
公开(公告)号：US5853503A
公开(公告)日：1998-12-29
申请号：US817947
申请日：1997-04-28
申请人： Kazuhiro Seto , Kei Sakata , Osamu Furukimi , Takashi Obara
发明人： Kazuhiro Seto , Kei Sakata , Osamu Furukimi , Takashi Obara
IPC分类号： B21B1/22 , B21B1/26 , B21B45/08 , C21D8/02 , C22C38/00 , C22C38/06 , C22C38/14 , C22C38/04
CPC分类号： C22C38/06 , B21B45/08 , C21D8/0226 , C21D8/0278 , B21B1/227 , B21B1/26
摘要： After a starting material of steel comprising C: 0.001-0.20 wt %, Si: 0.01-0.50 wt %, Mn: 0.05-2.0 wt %, P: not more than 0.05 wt %, S: not more than 0.05 wt %, sol.Al: 0.01-0.10 wt %, N: not more than 0.020 wt % and the balance being Fe and inevitable impurities is heated above AC.sub.3 point, rough rolling is completed within a temperature range of (Ar.sub.3 point+100.degree. C.)-(Ar.sub.3 point+50.degree. C.), and super-high pressure descaling is carried out under conditions satisfying a jetting pressure of not less than 25 kgf/cm.sup.2 and a liquid quantity density of not less than 0.002 liter/cm.sup.2, and subsequently finish rolling at a rolling reduction of not less than 80% above Ar.sub.3 point of a rolling completion temperature is started in 5 seconds and coiling is carried out below 700.degree. C., whereby hot rolled steel sheets having a surface roughness Ra of not more than 0.8 .mu.m and an average scale thickness of not more than 4 .mu.m is produced and the adhesion property in case of subjecting to shaping at a mill scale state and the pickling efficiency in case of applying to pickling are improved.
摘要翻译： PCT No.PCT / JP96 / 02455 Sec。 371日期1997年04月28日 102（e）日期1997年4月28日PCT提交1996年8月30日PCT公布。出版物WO97 / 08355 日期1997年3月6日在C：0.001-0.20重量％，Si：0.01-0.50重量％，Mn：0.05-2.0重量％，P：不大于0.05重量％的钢的起始原料之后，S：不大于 0.05重量％，sol.Al：0.01-0.10重量％，N：不大于0.020重量％，余量为Fe和不可避免的杂质被加热到AC3以上，在（Ar3点+ 100）的温度范围内完成粗轧 ℃） - （Ar3点+ 50℃），超高压除鳞在满足不低于25kgf / cm 2的喷射压力和不小于0.002升/分钟的液体密度的条件下进行， cm2，然后在5秒钟内开始轧制完成温度以上Ar3以上80％以上的压延成形，在700℃以下进行卷取，得到具有表面粗糙度Ra的热轧钢板不大于0.8μm，平均刻度厚度不大于4μm，并且在经受t o在轧制规模状态下成型，并且在施加酸洗的情况下的酸洗效率得到改善。

6. 发明申请

US20130233453A1 HIGH STRENGTH STEEL SHEET HAVING EXCELLENT FORMABILITY AND METHOD FOR MANUFACTURING THE SAME 审中-公开
标题翻译：具有优异可塑性的高强度钢板及其制造方法
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。

7. 发明申请

US20130199678A1 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：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。

8. 发明申请

US20130160907A1 HIGH STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT STRETCH FLANGEABILITY AND METHOD FOR MANUFACTURING THE SAME 审中-公开
标题翻译：高强度冷轧钢板具有优异的拉伸压缩率及其制造方法
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。

9. 发明申请

US20110271733A1 METHOD FOR MANUFACTURING HIGH STRENGTH HOT ROLLED STEEL SHEET 有权
标题翻译：制造高强度热轧钢板的方法
公开(公告)号：US20110271733A1
公开(公告)日：2011-11-10
申请号：US12674281
申请日：2008-08-20
申请人： Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
发明人： Takeshi Yokota , Kazuhiro Seto , Satoshi Ueoka , Nobuo Nishiura , Yoichi Tominaga
IPC分类号： B21D31/00
CPC分类号： C22C38/02 , C21D1/20 , C21D8/0426 , C21D8/0463 , C21D9/48 , C21D2211/002 , C21D2211/005 , C22C38/04
摘要： A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
摘要翻译：制造高强度热轧钢板的方法包括将板坯加热到1150-1300℃的温度范围内。热轧板坯，精轧温度在800〜1000℃的范围内。以30℃/ s以上的平均冷却速度将钢板冷却至525〜625℃的冷却终止温度。暂停冷却一段时间在3到10秒的范围内; 以钢板的冷却成核沸腾的方式冷却钢板; 并在400〜550℃的范围内卷取钢板。

10. 发明申请

US20090308504A1 STEEL SHEET EXCELLENT IN FINE BLANKING PERFORMANCE AND MANUFACTURING METHOD OF THE SAME 审中-公开
标题翻译：优异的细腻性能及其制造方法的钢板
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。

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