公开(公告)号：EP3153596A4

公开(公告)日：2017-11-15

申请号：EP15803190

申请日：2015-06-01

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： HAMASAKI YUTAKA ,  HAYASHI HIROSHI ,  HOSOYA SHINJI ,  KUWAYAMA SHINJIROU

IPC分类号： C21D1/667 ,  B01D19/00 ,  C21D1/613 ,  C21D9/08

CPC分类号： C21D9/085 ,  B01D19/0031 ,  B01D19/02 ,  C21D1/18 ,  C21D1/613 ,  C21D1/64 ,  C21D1/667

摘要： A quenching apparatus that can enhance hardenability is provided. A circulation apparatus (50) in the quenching apparatus recovers cooling fluid after the cooling fluid is used for quenching, and supplies the cooling fluid to a defoaming bath (431). A laminar flow weir (433) of a defoaming apparatus (4) partitions the defoaming bath (431) into a laminar flow bath (434) and a shallow bath (435). The laminar flow weir (433) is lower than a side wall of the laminar flow bath (434). Cooling fluid from the circulation apparatus (50) is supplied to the laminar flow bath (434), and the cooling fluid is poured into the shallow bath (435) from the laminar flow bath (434) along the laminar flow weir (433). A filter (432) is a plate shape or a sheet shape and has a mesh structure, and covers an opening in a bottom portion of the shallow bath (435). The liquid level height in the shallow bath (435) is less than the height of the laminar flow weir (433). A supply bath (441) accumulates cooling fluid that passes through the filter (432), and supplies the cooling fluid to a cooling apparatus that sprays the cooling fluid onto a metallic material.

公开(公告)号：EP2158984A4

公开(公告)日：2017-03-29

申请号：EP07791280

申请日：2007-07-25

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： KAWAMOTO MASAYUKI ,  TSUKAGUCHI YUICHI ,  HANAO MASAHITO ,  HIRATA ATSUSHI ,  HAYASHI HIROSHI ,  ADACHI MANABU

IPC分类号： B22D11/043 ,  B22D11/108

CPC分类号： B22D11/043 ,  B22D11/108

公开(公告)号：EP2808103A4

公开(公告)日：2016-01-13

申请号：EP13833216

申请日：2013-08-27

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： IKEDA TATSUHIKO ,  OKADA NOBUHIRO ,  HAYASHI HIROSHI ,  YAMAZAKI MASAHIRO

IPC分类号： B22D11/115 ,  B22D11/04

CPC分类号： B22D11/115 ,  B22D11/041 ,  B22D11/122

摘要： The present invention provides an electromagnetic stirrer uniformly applying an electromagnetic force to each casting mold. The electromagnetic stirrer of the present invention includes a pair of electromagnetic coils including a casting mold(s) between them, wherein an inner winding is applied to outside of each of two of tooth provided to a core of each of the pair of electromagnetic coils, an outer winding is applied to outside of the inner windings, ways of applying current to be applied to the windings are changed depending on the distance of the electromagnetic coils, and the number of the casting molds n, the external size Õ, and the width of each of the electromagnetic coils W are defined as n×Õ

摘要翻译： 本发明提供一种均匀地向每个铸模施加电磁力的电磁搅拌器。 本发明的电磁搅拌器包括一对包括它们之间的铸模的电磁线圈，其中将内部绕组施加到设置在所述一对电磁线圈中的每一个的芯的两个齿中的每一个的外侧， 外绕组被施加到内绕组的外部，施加到绕组的电流的方向根据电磁线圈的距离而变化，并且铸模n的数量，外部尺寸Õ和宽度 每个电磁线圈W被定义为n×Õ

公开(公告)号：EP2441541A4

公开(公告)日：2017-03-15

申请号：EP09760453

申请日：2009-08-18

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： HANAO MASAHITO ,  KAWAMOTO MASAYUKI ,  TSUKAGUCHI YUICHI ,  HAYASHI HIROSHI

IPC分类号： B22D11/108 ,  B22D11/00 ,  C21C7/076

CPC分类号： B22D11/108 ,  C21C7/076 ,  Y02P10/242

摘要： Mold flux for continuously casting steel which contains SiO 2 , T.CaO, Al 2 O 3 and MgO as main components, one or two or more of alkali metal oxides, and further the constituent F, while the ratio of the T.CaO content to the SiO 2 content being from 0.7 to 2.0, the Al 2 O 3 content being 35% or less, the MgO content being 20% or less, the total content of alkali metal oxides being 8% or less, the F content being 7% or less, characterized in that each of the contents expressed by formulae (b) to (e) below satisfies the formula (a): 0.63 + 2.51 × Y Al2O3 ‰¤ Y CaO /Y SiO2 ‰¤ 1.23+2.51 × Y Al2O3 ... (a), Y SiO2 = X SiO2 / (X SiO2 + X CaO + X Al2O3 + X MgO ) ... (b) , Y CaO = X CaO / (X SiO2 + X CaO + X Al2O3 + X MgO ) ... (C), Y Al2O3 = X Al2O3 / (X SiO2 + X CaO + X Al2O3 + X MgO ) ... (d) , and Y MgO = X MgO / (X SiO2 + X CaO + X Al2O3 + X MgO ) ... (e). Continuous casting of a round billet using this mold flux can effectively prevent the generation of pin-hole defects and longitudinal cracking.

摘要翻译： 含有SiO 2，T.CaO，Al 2 O 3和MgO作为主要成分的连续铸造钢的模具焊剂，一种或两种以上的碱金属氧化物，以及进一步的成分F，而T.CaO含量 SiO 2含量为0.7〜2.0，Al 2 O 3含量为35％以下，MgO含量为20％以下，碱金属氧化物的总含量为8％以下，F含量为7 ％以下，其特征在于，由式（b）〜（e）表示的各含量满足式（a）：0.63 + 2.51×Y Al2O3‰Y CaO / Y SiO2‰¤1.23 + 2.51×Y Al2O3 ...（a），Y SiO 2 = X SiO 2 /（X SiO 2 + X CaO + X Al 2 O 3 + X MgO）...（b），Y CaO = X CaO /（XSiO 2 + X CaO + X Al 2 O 3 + X （C），Y Al 2 O 3 = X Al 2 O 3 /（X SiO 2 + X CaO + X Al 2 O 3 + X MgO）...（d），Y MgO = X MgO /（XSiO 2 + X CaO + X Al2O3 + X MgO）...（e）。 使用此模具焊剂连续铸造圆钢坯可有效防止针孔缺陷和纵向破裂的产生。

公开(公告)号：EP2165788A4

公开(公告)日：2017-03-29

申请号：EP07791273

申请日：2007-07-25

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： TSUKAGUCHI YUICHI ,  KAWAMOTO MASAYUKI ,  HANAO MASAHITO ,  HIRATA ATSUSHI ,  HAYASHI HIROSHI

IPC分类号： B22D11/124 ,  B22D11/115 ,  B22D11/16 ,  B22D11/18 ,  B22D11/20 ,  B22D11/22

CPC分类号： B22D11/115 ,  B22D11/16 ,  B22D11/186 ,  B22D11/207 ,  B22D11/225

摘要： The invention provides a method of continuously casting a billet with a small cross section in which the billet has a cross sectional area not more than 500 cm 2 and a molten steel is poured into a mold using a cylindrical immersion nozzle with a single port, being characterized in that the molten steel level in the mold is measured using an eddy current sensor for molten steel level control in a mold, the molten steel surface level is controlled based on the thus-measured value, motion of molten steel in the mold is adjusted by applying electromagnetic stirring, a cooling zone during the final period of solidification is disposed within a certain region ranging from the meniscus to the specific site, a casting speed is adjusted so that the region in which the solid phase ratio at the billet center is 0.3-0.99 may be included in the cooling zone during the final period of solidification, and the specific amount of secondary cooling water, the billet surface temperature at the entrance to the cooling zone during the final period of solidification and the density of cooling water in the cooling zone during the final period of solidification are optimized. By this, billets with a small cross section can be continuously cast for various steel grades while stably and reliably reducing the occurrence of center porosity at the billet center and improving the billet inner quality.

公开(公告)号：EP2161086A4

公开(公告)日：2013-07-10

申请号：EP07791268

申请日：2007-07-25

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： TSUKAGUCHI YUICHI ,  KAWAMOTO MASAYUKI ,  HANAO MASAHITO ,  HIRATA ATSUSHI ,  HAYASHI HIROSHI ,  ADACHI MANABU

IPC分类号： B22D11/128 ,  B22D11/14 ,  B22D11/16 ,  B22D11/20 ,  B22D11/22

CPC分类号： B22D11/1282 ,  B22D11/141 ,  B22D11/142 ,  B22D11/166 ,  B22D11/225