公开(公告)号：US20060102316A1

公开(公告)日：2006-05-18

申请号：US11314505

申请日：2005-12-21

申请人： Seiji Itoyama ,  Toshio Fujimura ,  Makoto Suzuki ,  Hirohide Uehara ,  Takeshi Matsuzaki ,  Chikashi Tada ,  Yuji Miki ,  Akira Yamauchi

发明人： Seiji Itoyama ,  Toshio Fujimura ,  Makoto Suzuki ,  Hirohide Uehara ,  Takeshi Matsuzaki ,  Chikashi Tada ,  Yuji Miki ,  Akira Yamauchi

IPC分类号： B22D11/04 ,  B22D27/02 ,  B22D11/051

CPC分类号： B22D11/14 ,  B22D11/00 ,  B22D11/115

摘要： An ultra-low carbon steel slab having a carbon content of about 0.01 mass percent or less is produced by casting at a casting speed of more than about 2.0 m/min using a mold provided with a casting space having a short side length D of about 150 to about 240 mm and an immersion nozzle provided with discharge spouts each having a lateral width d, the ratio D/d being in the range of from about 1.5 to about 3.0. Accordingly, a ultra-low carbon steel slab can be obtained having superior surface quality without performing slab conditioning such as scarfing.

摘要翻译： 碳含量为约0.01质量％以下的超低碳钢板坯，以铸锭速度大于约2.0m / min，通过使用具有短边长度D为约 150至240mm的浸渍喷嘴和设置有横向宽度d的排出口的浸渍喷嘴，D / d的比值在约1.5至约3.0的范围内。 因此，可以获得具有优异的表面质量的超低碳钢板坯，而不进行诸如烧烤的板坯调节。

公开(公告)号：US20050045303A1

公开(公告)日：2005-03-03

申请号：US10921434

申请日：2004-08-19

申请人： Seiji Itoyama ,  Toshio Fujimura ,  Makoto Suzuki ,  Hirohide Uehara ,  Takeshi Matsuzaki ,  Chikashi Tada ,  Yuji Miki ,  Akira Yamauchi

发明人： Seiji Itoyama ,  Toshio Fujimura ,  Makoto Suzuki ,  Hirohide Uehara ,  Takeshi Matsuzaki ,  Chikashi Tada ,  Yuji Miki ,  Akira Yamauchi

IPC分类号： B22D11/16 ,  B22D11/00 ,  B22D11/115 ,  B22D11/14 ,  B22D11/18 ,  B22D11/20 ,  B22D27/02

CPC分类号： B22D11/14 ,  B22D11/00 ,  B22D11/115

摘要： An ultra-low carbon steel slab having a carbon content of about 0.01 mass percent or less is produced by casting at a casting speed of more than about 2.0 m/min using a mold provided with a casting space having a short side length D of about 150 to about 240 mm and an immersion nozzle provided with discharge spouts each having a lateral width d, the ratio D/d being in the range of from about 1.5 to about 3.0. Accordingly, a ultra-low carbon steel slab can be obtained having superior surface quality without performing slab conditioning such as scarfing.

摘要翻译： 碳含量为约0.01质量％以下的超低碳钢板坯，以铸锭速度大于约2.0m / min，通过使用具有短边长度D为约 150至240mm的浸渍喷嘴和设置有横向宽度d的排出口的浸渍喷嘴，D / d的比值在约1.5至约3.0的范围内。 因此，可以获得具有优异的表面质量的超低碳钢板坯，而不进行诸如烧烤的板坯调节。

公开(公告)号：US5356454A

公开(公告)日：1994-10-18

申请号：US98139

申请日：1993-07-28

申请人： Seiji Itoyama ,  Hidenari Kitaoka ,  Toshikazu Sakuraya ,  Kenichi Sorimachi ,  Saburo Moriwaki ,  Sumio Yamada ,  Chikashi Tada ,  Takahiro Mitumune ,  Shinichi Kaneko ,  Masafumi Maeda

发明人： Seiji Itoyama ,  Hidenari Kitaoka ,  Toshikazu Sakuraya ,  Kenichi Sorimachi ,  Saburo Moriwaki ,  Sumio Yamada ,  Chikashi Tada ,  Takahiro Mitumune ,  Shinichi Kaneko ,  Masafumi Maeda

IPC分类号： B22D11/111 ,  C21C7/076 ,  B22C1/00

CPC分类号： B22D11/111

摘要： A mold powder for use in continuous casting, containing specified amounts of CaO, Al.sub.2 O.sub.3, TiO.sub.2, Li.sub.2 O, BaO, MgO, F and Na.sub.2 O, and further containing at least one of BN and C as aggregate. The mold powder, when used in continuous casting of a steel rich in strong reducing metal elements such as Al, Ti, REM and so forth, remarkably suppresses generation of deterioration in the surface quality of the slab and break out of the slab which are attributable inferior lubrication.

摘要翻译： 一种用于连续铸造的模具粉末，含有规定量的CaO，Al 2 O 3，TiO 2，Li 2 O，BaO，MgO，F和Na 2 O，并且还含有BN和C中的至少一种作为骨料。 模具粉末，当用于连续铸造富含强还原性金属元素如Al，Ti，REM等的钢时，显着地抑制了板坯的表面质量的劣化和由于 润滑不良

公开(公告)号：US06250370B1

公开(公告)日：2001-06-26

申请号：US09198860

申请日：1998-11-24

申请人： Chikashi Tada ,  Yuji Miki

发明人： Chikashi Tada ,  Yuji Miki

IPC分类号： B22D11124

CPC分类号： B22D11/124

摘要： Water-cooling slabs by dipping to yield steel sheets with a minimum of scabs and uneven gloss, with their larger faces upside and underside, by water injection at a flow rate of 10-150 L/m2·min perpendicular or oblique to the underside of the slabs, with the position of water injection 30-500 mm away from the underside of the slabs.

摘要翻译： 通过浸渍来制造水冷板，通过以10-150L / m2.min的流速注入垂直或倾斜于下方的水，以最小的痂和光泽不均匀的较大的面上面和下面。 板坯的位置距离板坯的下侧30-500毫米的注水位置。

公开(公告)号：US07901482B2

公开(公告)日：2011-03-08

申请号：US12223635

申请日：2007-02-06

申请人： Chikashi Tada ,  Chitoshi Matsumura

发明人： Chikashi Tada ,  Chitoshi Matsumura

IPC分类号： C21C1/04 ,  C21C5/34 ,  C21C7/076

CPC分类号： C21C7/10 ,  C21C7/0006 ,  C21C7/04 ,  C21C7/072 ,  C21C7/076 ,  Y02P10/212 ,  Y02P10/242

摘要： Molten steel is refined in an electric furnace by using iron scrap as a main iron source, and is tapped into a separate refining vessel. Thereafter, metallic-Al containing material and CaO are added onto a bath surface of the molten steel, and an oxygen containing gas is supplied to the molten steel. Thereby, a nitrogen-removal reaction utilizing an AlN formation reaction is caused to proceed. Consequently, even in the case of molten steel having a low carbon content, a low-nitrogen steel can be refined and produced at low costs.

摘要翻译： 熔炼钢通过使用铁屑作为主要铁源在电炉中精炼，并被分解成单独的精炼容器。 然后，将含有金属的Al材料和CaO加入到钢水的浴面上，向钢水供给含氧气体。 由此，进行利用AlN形成反应的除氮反应。 因此，即使在碳含量低的钢水的情况下，低氮钢也可以以低成本进行精炼和制造。

公开(公告)号：US5028388A

公开(公告)日：1991-07-02

申请号：US617424

申请日：1990-11-19

申请人： Chikashi Tada ,  Keizo Taoka ,  Sumio Yamada ,  Hajime Bada

发明人： Chikashi Tada ,  Keizo Taoka ,  Sumio Yamada ,  Hajime Bada

IPC分类号： C21B11/00 ,  C21B13/00 ,  C21C5/00 ,  C21C5/35 ,  C22C33/04

CPC分类号： C21C5/35 ,  C21C5/005

摘要： Reduction of chromium oxide is performed by utilizing refinement or reduction container having top-blowing capability. Chromium oxide is charged in the molten iron bath in the aforementioned container. Content of slag is adjusted to maintain the following condition:CaO/SiO.sub.2 :2.1 to 3.5MgO/Al.sub.2 O.sub.3 :0.6 to 0.8

公开(公告)号：US06732547B1

公开(公告)日：2004-05-11

申请号：US09700020

申请日：2000-11-09

申请人： Hisahiro Matsunaga ,  Chikashi Tada ,  Masato Kumagai ,  Toshikazu Sakuraya

发明人： Hisahiro Matsunaga ,  Chikashi Tada ,  Masato Kumagai ,  Toshikazu Sakuraya

IPC分类号： C04B506

CPC分类号： C04B5/06 ,  C04B2111/1075 ,  C21C5/005 ,  C21C5/54 ,  C21C7/0685 ,  C22B7/04 ,  Y02P10/216

摘要： The slag in a molten state formed at a step of refining stainless steel is adjusted such that the slag has a basicity in the range of 1.3-4.0, and the slag is mixed with a sulfur-containing material wherein the sulfur is zero or minus in valence, thereby setting the concentration of sulfur in the slag to be not less than 0.2% by weight. The slag is so modified that Cr6+ is substantially completely prevented from being eluted and can be effectively utilized as a roadbed material and a reclamation material for civil works. The slag is quenched at such a speed of cooling that the temperature of the slag is decreased from 1200° C. to 400° C. within 48 hours so that noticeable effects are attained.

摘要翻译： 调整在精炼不锈钢的步骤中形成的熔融状态的炉渣，使得炉渣的碱度范围为1.3-4.0，炉渣与含硫物质混合，其中硫为零或负 从而将炉渣中的硫浓度设定为不小于0.2重量％。 炉渣进行了如此修改，使得Cr <6+>基本上完全防止洗脱，可以有效地用作土木工程的路基材料和填土材料。 炉渣以这样的冷却速度淬火，使炉渣的温度在48小时内从1200℃降至400℃，从而达到明显的效果。

公开(公告)号：US20090019968A1

公开(公告)日：2009-01-22

申请号：US12223635

申请日：2007-02-06

申请人： Chikashi Tada ,  Chitoshi Matsumura

发明人： Chikashi Tada ,  Chitoshi Matsumura

IPC分类号： C21C5/52 ,  C21B3/02

CPC分类号： C21C7/10 ,  C21C7/0006 ,  C21C7/04 ,  C21C7/072 ,  C21C7/076 ,  Y02P10/212 ,  Y02P10/242

摘要： Molten steel is refined in an electric furnace by using iron scrap as a main iron source, and is tapped into a separate refining vessel. Thereafter, metallic-Al containing material and CaO are added onto a bath surface of the molten steel, and an oxygen containing gas is supplied to the molten steel. Thereby, a nitrogen-removal reaction utilizing an AlN formation reaction is caused to proceed. Consequently, even in the case of molten steel having a low carbon content, a low-nitrogen steel can be refined and produced at low costs.

摘要翻译： 熔炼钢通过使用铁屑作为主要铁源在电炉中精炼，并被分解成单独的精炼容器。 然后，将含有金属的Al材料和CaO加入到钢水的浴面上，向钢水供给含氧气体。 由此，进行利用AlN形成反应的除氮反应。 因此，即使在碳含量低的钢水的情况下，低氮钢也可以以低成本进行精炼和制造。

公开(公告)号：US4919713A

公开(公告)日：1990-04-24

申请号：US315407

申请日：1989-02-23

申请人： Sumio Yamada ,  Chikashi Tada ,  Keizo Taoka ,  Hajime Bada

发明人： Sumio Yamada ,  Chikashi Tada ,  Keizo Taoka ,  Hajime Bada

IPC分类号： C21B11/00 ,  C21B13/00 ,  C21C5/00 ,  C21C5/35

CPC分类号： C21C5/005 ,  C21C5/35 ,  Y02P10/212

摘要： A process of production of chromium containing molten iron generally comprises two steps. In a first step, top and bottom-blown reduction for reducing chromium is performed with charging carbon containing material and slag forming agent from the top of a converter for melting stainless scrap and for rising temperature of molten iron bath. In a second step which is performed subsequently to the first step, top and bottom-blown injection with charging chromium oxide and carbon from the top of the converter for reduction of chromium.