公开(公告)号：US20110076512A1

公开(公告)日：2011-03-31

申请号：US12736998

申请日：2009-06-15

申请人： Kenichi Yamamoto ,  Katsuhiro Sasai ,  Hideaki Yamamura ,  Hiroshi Harada ,  Kaoru Kawasaki

发明人： Kenichi Yamamoto ,  Katsuhiro Sasai ,  Hideaki Yamamura ,  Hiroshi Harada ,  Kaoru Kawasaki

IPC分类号： C22C38/04 ,  C22C38/24 ,  C22C33/04 ,  B32B15/18

CPC分类号： C21C7/0006 ,  C21C7/06 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  Y10T428/1266

摘要： A high-strength steel sheet includes: 0.03 to 0.20% of C, 0.08 to 1.5% of Si, 0.5 to 3.0% of Mn, 0.05% or less of P, 0.0005% or more of S, 0.008 to 0.20% of acid-soluble Ti, 0.0005 to 0.01% of N, more than 0.01% of acid-soluble Al, and 0.001 to 0.04% of one or both of Ce and La in terms of mass %; and the balance including Fe and inevitable impurities. The ratio of (Ce+La)/acid-soluble Al is equal to or more than 0.1 and the ratio of (Ce+La)/S is in the range of 0.4 to 50 in a mass base, and the density of the number of inclusions, having a circle equivalent diameter of 2 μm or less, which are present in the steel sheet is equal to or more than 15/mm2.

摘要翻译： 高强度钢板包括：0.03〜0.20％的C，0.08〜1.5％的Si，0.5〜3.0％的Mn，0.05％以下的P，0.0005％以上的S，0.008〜0.20％的酸 - 可溶性Ti，0.0005〜0.01％N，0.01％以上的酸溶性Al和0.001〜0.04％的Ce和La中的一种或两种，以质量％计; 余量包括Fe和不可避免的杂质。 （Ce + La）/酸溶性Al的比例等于或大于0.1，（Ce + La）/ S的比例在质量基底中在0.4〜50的范围内，数量的密度 存在于钢板中的圆当量直径为2μm以下的夹杂物等于或大于15个/ mm 2。

公开(公告)号：US09650690B2

公开(公告)日：2017-05-16

申请号：US12736998

申请日：2009-06-15

申请人： Kenichi Yamamoto ,  Katsuhiro Sasai ,  Hideaki Yamamura ,  Hiroshi Harada ,  Kaoru Kawasaki

发明人： Kenichi Yamamoto ,  Katsuhiro Sasai ,  Hideaki Yamamura ,  Hiroshi Harada ,  Kaoru Kawasaki

IPC分类号： C22C38/04 ,  C21C7/00 ,  C21C7/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/14

CPC分类号： C21C7/0006 ,  C21C7/06 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14 ,  Y10T428/1266

摘要： A high-strength steel sheet includes: 0.03 to 0.20% of C, 0.08 to 1.5% of Si, 0.5 to 3.0% of Mn, 0.05% or less of P, 0.0005% or more of S, 0.008 to 0.20% of acid-soluble Ti, 0.0005 to 0.01% of N, more than 0.01% of acid-soluble Al, and 0.001 to 0.04% of one or both of Ce and La in terms of mass %; and the balance including Fe and inevitable impurities. The ratio of (Ce+La)/acid-soluble Al is equal to or more than 0.1 and the ratio of (Ce+La)/S is in the range of 0.4 to 50 in a mass base, and the density of the number of inclusions, having a circle equivalent diameter of 2 μm or less, which are present in the steel sheet is equal to or more than 15/mm2.

公开(公告)号：US20090317285A1

公开(公告)日：2009-12-24

申请号：US12373570

申请日：2007-03-02

申请人： Katsuhiro Sasai ,  Wataru Ohashi ,  Kenichi Yamamoto ,  Kaoru Kawasaki ,  Hiroshi Harada

发明人： Katsuhiro Sasai ,  Wataru Ohashi ,  Kenichi Yamamoto ,  Kaoru Kawasaki ,  Hiroshi Harada

IPC分类号： C22C38/04

CPC分类号： C22C38/02 ,  C21D8/0426 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/002 ,  C22C38/005 ,  C22C38/04

摘要： The present invention provides high strength hot rolled steel plate superior in stretch flange formability and fatigue characteristics comprising steel plate containing C: 0.03 to 0.20%, Si: 0.08 to 1.5%, Mn: 1.0 to 3.0%, P: 0.05% or less, S: 0.0005% or more, N: 0.0005 to 0.01%, acid soluble Al: 0.01% or less, acid soluble Ti: less than 0.008%, and a total of one or both of Ce or La: 0.0005 to 0.04%, having a balance of iron and unavoidable impurities and having a number ratio of stretched inclusions present in the steel plate having a circle equivalent diameter of 1 μm or more and a long axis/short axis of 5 or more of 20% or less.

摘要翻译： 本发明提供了拉伸凸缘成形性和疲劳特性优异的高强度热轧钢板，其特征在于包括C：0.03〜0.20％，Si：0.08〜1.5％，Mn：1.0〜3.0％，P：0.05％以下的钢板， S：0.0005％以上，N：0.0005〜0.01％，酸溶性Al：0.01％以下，酸溶性Ti：小于0.008％，Ce或La中的一种或两种以上：0.0005〜0.04％，具有 余量为铁和不可避免的杂质，并且具有圆钢当量直径为1μm以上且长轴/短轴为5以上的拉伸夹杂物的数量比为20％以下。

公开(公告)号：US06443219B1

公开(公告)日：2002-09-03

申请号：US09367183

申请日：1999-08-09

申请人： Katsuhiro Sasai ,  Eiichi Takeuchi ,  Hiroshi Harada ,  Hajime Hasegawa ,  Takehiko Toh ,  Keisuke Fujisaki

发明人： Katsuhiro Sasai ,  Eiichi Takeuchi ,  Hiroshi Harada ,  Hajime Hasegawa ,  Takehiko Toh ,  Keisuke Fujisaki

IPC分类号： B22D2702

CPC分类号： B22D11/041 ,  B22D11/115 ,  B22D11/20 ,  Y10T428/12 ,  Y10T428/12458 ,  Y10T428/12472 ,  Y10T428/12576 ,  Y10T428/12958 ,  Y10T428/12965

摘要： The present invention provides a continuous casting method in which vibration is given to molten metal by a shifting magnetic field so that the equi-axed crystal ratio can be enhanced and the equi-axed crystals can be made fine without generating surface defects caused by powder trapping. Further, the present invention provides an apparatus to which the continuous casting method is applied. Furthermore the present invention provides a cast slab produced by the above method and apparatus. The method of casting molten metal comprises the following steps: pouring molten metal into a mold and solidifying it in the mold while applying an electromagnetic force, which is generated by an electromagnetic coil arranged in the proximity of a molten metal pool in the mold, upon the molten metal; and vibrating the molten metal, which has been solidified in the mold while being cooled and solidified, by a shifting magnetic field generated by the electromagnetic coil so that the molten metal is accelerated by a high intensity and a low intensity of acceleration in a range not exceeding a predetermined flow velocity when the directional vectors of high acceleration and low acceleration in the same direction or in the opposite direction are combined with each other.

摘要翻译： 本发明提供了一种连续铸造方法，其中通过移动磁场对熔融金属进行振动，从而可以提高等轴晶体比，并且可以使等轴晶体细化而不产生由粉末捕获引起的表面缺陷 。 此外，本发明提供了一种应用连续铸造方法的装置。 此外，本发明提供了通过上述方法和装置制造的铸造板坯。 铸造熔融金属的方法包括以下步骤：将熔融金属浇注到模具中并将其固化在模具中，同时施加由布置在模具中的熔融金属池附近的电磁线圈产生的电磁力， 熔融金属; 并且通过由电磁线圈产生的移动磁场使已在模具中固化的熔融金属振动，使得熔融金属在不是的范围内以高强度和低强度的加速度加速 当相同方向或相反方向上的高加速度和低加速度的方向矢量彼此组合时，超过预定流速。

公开(公告)号：US06773829B2

公开(公告)日：2004-08-10

申请号：US10093916

申请日：2002-03-07

申请人： Katsuhiro Sasai ,  Eiichi Takeuchi ,  Hiroshi Harada ,  Hajime Hasegawa ,  Takehiko Toh ,  Keisuke Fujisaki

发明人： Katsuhiro Sasai ,  Eiichi Takeuchi ,  Hiroshi Harada ,  Hajime Hasegawa ,  Takehiko Toh ,  Keisuke Fujisaki

IPC分类号： B32B1501

CPC分类号： B22D11/041 ,  B22D11/115 ,  B22D11/20 ,  Y10T428/12 ,  Y10T428/12458 ,  Y10T428/12472 ,  Y10T428/12576 ,  Y10T428/12958 ,  Y10T428/12965

摘要： A cast slab has a negative segregation zone composed of a multilayer structure of negative segregation layers disposed between dendrite or crystalline layers. The dendrite or crystalline layers are a deflection structure caused by vibration during formation of the cast slab. The negative segregation layers have a distance between them of not more than 2 mm and the number of negative segregation layers is not less than 3. The cast slab has an equi-axed crystal ratio of not less than 50% inside the multilayer negative segregation zone.

摘要翻译： 铸造板坯具有负偏析区域，该偏析区域由设置在枝晶层或结晶层之间的负偏析层的多层结构构成。 枝晶或结晶层是由铸造板形成期间的振动引起的偏转结构。 负偏析层之间的距离不大于2mm，负偏析层的数量不小于3.多层负极偏析区内的铸坯的等轴晶体比不小于50％ 。

公开(公告)号：US08048197B2

公开(公告)日：2011-11-01

申请号：US12070264

申请日：2008-02-15

申请人： Katsuhiro Sasai ,  Wataru Ohashi ,  Tooru Matsumiya ,  Yoshiaki Kimura ,  Junji Nakashima

发明人： Katsuhiro Sasai ,  Wataru Ohashi ,  Tooru Matsumiya ,  Yoshiaki Kimura ,  Junji Nakashima

IPC分类号： C21C7/06 ,  C21C7/068 ,  C21C7/10

CPC分类号： C21C7/06 ,  C21C7/0006 ,  C21C7/068

摘要： The present invention provides a low carbon steel sheet and a low carbon steel slab on which formation of surface defects can be surely prevented by preventing aggregation of inclusions in the molten steel and finely dispersing inclusions in the steel sheet or slab, and a process for producing the steel sheet and slab. The present invention provides a process comprising the steps of decarburizing a molten steel so as to produce a carbon concentration of up to 0.01% by mass, pre-deoxidizing the molten steel by adding Al thereto so as to produce a dissolved oxygen concentration from 0.01 to 0.04% by mass, adding thereto Ti and at least La and/or Ce, and casting the molten steel, and a steel sheet and a steel slab obtained by the process.

摘要翻译： 本发明提供一种低碳钢板和低碳钢板坯，通过防止钢水中的夹杂物的凝集和微细地分散在钢板或板坯中的夹杂物，能够可靠地防止表面缺陷的形成， 钢板和板坯。 本发明提供了一种方法，该方法包括以下步骤：使钢水脱碳以产生高达0.01质量％的碳浓度，通过加入Al对钢水进行预脱氧，以使溶解氧浓度从0.01到 0.04质量％，添加Ti和至少La和/或Ce，铸造钢水，以及通过该方法获得的钢板和钢坯。

公开(公告)号：US20120261085A1

公开(公告)日：2012-10-18

申请号：US13530946

申请日：2012-06-22

申请人： Katsuhiro Sasai ,  Wataru Ohashi

发明人： Katsuhiro Sasai ,  Wataru Ohashi

IPC分类号： B22D23/00

CPC分类号： B22D11/001 ,  B22D11/115 ,  C21C7/0006 ,  C21C7/06 ,  C21C7/068 ,  C21C7/10 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： A method of producing an extremely low carbon steel cast slab characterized by casting molten steel obtained by reducing the carbon concentration of the molten steel to 0.005 mass % or less, then adding Cu, Nb, and B to the molten steel, furthermore, and adjusting the concentration of dissolved oxygen in the molten steel to 0.01 mass % to 0.06 mass % and extremely low carbon steel plate comprised of steel containing C: 0.005 mass % or less, acid soluble Al: 0.005 mass % or less, and further Cu, Nb, and B, characterized in that the steel has fine oxides of a diameter of 0.5 μm to 30 μm dispersed in it in an amount of 1000 particles/cm2 to 1,000,000 particles/cm2.

摘要翻译： 一种生产极低碳钢铸坯的方法，其特征在于将通过将钢水的碳浓度降低至0.005质量％以下而获得的钢水，然后向钢水中添加Cu，Nb和B，并且调整 钢水中的溶解氧的浓度为0.01质量％〜0.06质量％，由含有C：0.005质量％以下的钢，酸溶性Al：0.005质量％以下的钢以及进一步的Cu，Nb 和B，其特征在于，所述钢以1000个/ cm 2〜1,000,000个/ cm 2的量分散在其中的直径为0.5μm〜30μm的微细氧化物。

公开(公告)号：US20100319816A1

公开(公告)日：2010-12-23

申请号：US12806971

申请日：2010-08-24

申请人： Katsuhiro Sasai ,  Wataru Ohashi

发明人： Katsuhiro Sasai ,  Wataru Ohashi

IPC分类号： C21D8/02

CPC分类号： C21C7/068 ,  C21C7/064 ,  C21D8/04 ,  C22C38/004 ,  C22C38/14

摘要： The present invention provides ultralow carbon thin gauge steel sheet and a method for producing the same where coalescence and growth of inclusions in the molten steel are prevented and the inclusions are finely dispersed in the steel sheet, whereby surface defects and cracks at the time of press forming are prevented, growth of recrystallized grains at the time of continuous annealing is promoted, and a high r value (r value≧2.0) and elongation (total elongation≧0%) are exhibited, that is, ultralow carbon thin gauge steel sheet excellent in surface conditions, formability, and workability comprised of, by mass %, 0.00030.003%≦C≦0.003%, Si≦0.01%, Mn≦0.1%, P≦0.02%, S≦0.01%, 0.0005%≦N≦0.0025%, 0.01%≦acid soluble Ti≦0.07%, acid soluble Al≦0.003%, and 0.002%≦La+Ce+Nd≦0.02% and a balance of iron and unavoidable impurities, said steel sheet characterized by containing at least cerium oxysulfite, lanthanum oxysulfite, and neodymium oxysulfite.

摘要翻译： 本发明提供了超低碳薄钢板及其制造方法，能够防止钢水中的夹杂物的凝结和生长，并且将夹杂物细分散在钢板中，由此在压制时表面缺陷和裂纹 可以促进连续退火时的再结晶晶粒生长，r值（r值≥2.0），伸长率（总伸长率≥0％）高，即超低碳薄型钢板优异 在表面条件，成形性和可加工性方面，以质量％计含有0.00030.003％＆NlE; C＆lt; E; 0.003％，Si＆NlE; 0.01％，Mn＆NlE; 0.1％，P＆NlE; 0.02％，S＆NlE; 0.01％，0.0005％ N％，0.0025％，0.01％和0.01％，酸溶性Ti + nIE：0.07％，酸溶Al和N，0.003％和0.002％，其中La + Ce + Nd和nlE为0.02％，余量为铁和不可避免的杂质， 含有至少硫代亚硫酸铈，硫代亚硫酸镧和钕氧化物 亚硫酸盐

公开(公告)号：US20100158746A1

公开(公告)日：2010-06-24

申请号：US11884502

申请日：2006-02-16

申请人： Katsuhiro Sasai ,  Wataru Ohashi

发明人： Katsuhiro Sasai ,  Wataru Ohashi

IPC分类号： C22C38/08 ,  B22D25/00 ,  B22D27/15 ,  B22D27/02 ,  C22C38/16

CPC分类号： B22D7/00 ,  B22D11/001 ,  B22D11/115 ,  C21D8/0226 ,  C21D8/0236 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： A method of producing an extremely low carbon steel cast slab characterized by casting molten steel obtained by reducing the carbon concentration of the molten steel to 0.005 mass % or less, then adding Cu, Nb, and B to the molten steel, furthermore, and adjusting the concentration of dissolved oxygen in the molten steel to 0.01 mass % to 0.06 mass % and extremely low carbon steel plate comprised of steel containing C: 0.005 mass % or less, acid soluble Al: 0.005 mass % or less, and further Cu, Nb, and B, characterized in that the steel has fine oxides of a diameter of 0.5 μm to 30 μm dispersed in it in an amount of 1000 particles/cm2 to 1,000,000 particles/cm2.

摘要翻译： 一种生产极低碳钢铸坯的方法，其特征在于将通过将钢水的碳浓度降低至0.005质量％以下而获得的钢水，然后向钢水中添加Cu，Nb和B，并且调整 钢水中的溶解氧的浓度为0.01质量％〜0.06质量％，由含有C：0.005质量％以下的钢，酸溶性Al：0.005质量％以下的钢以及进一步的Cu，Nb 和B，其特征在于，所述钢以1000个/ cm 2〜1,000,000个/ cm 2的量分散在其中的直径为0.5μm〜30μm的微细氧化物。

公开(公告)号：US20090288799A1

公开(公告)日：2009-11-26

申请号：US12084068

申请日：2006-10-27

申请人： Masafumi Miyazaki ,  Akihiro Matsuzawa ,  Katsuhiro Sasai ,  Wataru Ohashi ,  Yasuhiko Ohtani ,  Katsunori Yamada ,  Masahiro Doki ,  Go Hirata ,  Yoshiaki Kimura ,  Hajime Hasegawa

发明人： Masafumi Miyazaki ,  Akihiro Matsuzawa ,  Katsuhiro Sasai ,  Wataru Ohashi ,  Yasuhiko Ohtani ,  Katsunori Yamada ,  Masahiro Doki ,  Go Hirata ,  Yoshiaki Kimura ,  Hajime Hasegawa

IPC分类号： B22D11/10

CPC分类号： B22D11/108 ,  B22D11/117 ,  B22D41/58 ,  C21C7/0006 ,  C21C7/068 ,  C21C7/072 ,  Y02P10/212

摘要： A method of production of an ultralow carbon cast slab characterized by adding Ti to molten steel decarburized to a carbon concentration of 0.01 mass % or less, further adding at least one of Ce, La, and Nd, and using an immersion nozzle to inject the above molten steel from a tundish to a casting mold for continuous casting while maintaining a flow rate of Ar gas blown from any location in a range from a tundish upper nozzle to discharge ports of said immersion nozzle at 3 Nl (normal liter)/min or less.

摘要翻译： 一种制造超低碳铸坯的方法，其特征在于，将脱碳至脱碳浓度为0.01质量％以下的钢水中添加Ti，进一步添加Ce，La，Nd中的至少一种，使用浸渍喷嘴 从中间包到铸造模具的钢水连续铸造，同时保持从中间包上部喷嘴到所述浸渍喷嘴的排出口的任何位置吹送的Ar气体的流量为3N（正常升/分钟），或 减。