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公开(公告)号：AR083187A1
公开(公告)日：2013-02-06
申请号：ARP110103560
申请日：2011-09-28
Applicant: JFE STEEL CORP
Inventor： ITO YOICHI , NABESHIMA SEIJI , SHIMAZAKI TAIJI
Abstract: Se proporciona un método para detectar una fuga en colada continua, el cual puede, en forma anticipada, evitar el derrame de acero fundido por debajo de un extremo inferior de un molde, debido a una fuga. Se integran termocuplas en un molde de colada continua, a intervalos de 100 a 200 mm., en la dirección del ancho, en dos posiciones entre 50 y 300 mm. por debajo de un menisco en una dirección de colada, y a una profundidad entre 5 y 15 mm. con respecto a una superficie de una placa de cobre sobre un lateral del acero fundido, y se utilizan respectivas mediciones de los valores de temperatura de las termocuplas para determinar que se ha producido una fuga.
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公开(公告)号：MX378064B
公开(公告)日：2025-03-04
申请号：MX2017008360
申请日：2017-06-22
Applicant: JFE STEEL CORP
Inventor： OTA HIROKI , YUGA MASAO , OKATSU MITSUHIRO , NABESHIMA SEIJI , ISHIGURO YASUHIDE
Abstract: Se proporciona un tubo de acero sin costura de alta resistencia para productos tubulares para países productores de petróleo que tenga una superior resistencia al craqueo por estrés en presencia de sulfuro. El tubo de acero sin costura contiene, % en masa, C: 0.20% a 0.50%, Si: 0.05% a 0.40%, Mn: 0.3% a 0.9%, P: 0.015% o menos, S: 0.005% o menos, Al: 0.005% a 0.1%, N: 0.006% o menos, Mo: más del 1.0% y el 3.0% o menos, V: 0.01% o más y menos del 0.05%, Nb: 0.001% o más y menos del 0.01%, B: 0.0003% a 0.0030%, O: 0.0030% o menos, y Ti: 0.003% a 0.025% en el cual Ti/N: se satisface de 2.0 a 5.0, una fracción en volumen de una martensita templada es del 95% o más, antes de que los granos de austenita tengan un número de tamaño de grano de 8.5 o más, y en una sección transversal perpendicular a una dirección laminado, el número de inclusiones a base de nitruro que tienen un tamaño de grano de 4 µm o más es 100 o menos por 100 mm2, el número de inclusiones a base de nitruro que tienen un tamaño de grano de menos de 4 µm es 1000 o menos por 100 mm2, el número de inclusiones a base de óxido que tienen un tamaño de grano de 4 µm o más es 40 o menos por 100 mm2, y el número de inclusiones a base de óxido que tienen un tamaño de grano de menos de 4 µm es 400 o menos por 100 mm2.
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公开(公告)号：DE60113451T2
公开(公告)日：2006-01-19
申请号：DE60113451
申请日：2001-12-12
Applicant: JFE STEEL CORP
Inventor： NABESHIMA SEIJI , TAKEUCHI SHUJI , OGAWA HISASHI , NABESHIMA YUKI , MASUMOTO YASUYUKI
Abstract: A method of producing a high nitrogen, ultra low carbon steel suitable to rolling material for use in cold rolled steel sheets having excellent age hardening property by an age hardening treatment after forming by working, with no defects in slabs or steel sheets, reliably, at a reduced cost and with a high productivity is proposed. The method for producing a rolling material for use in ultra low carbon steel sheets at: C ≤ 0.0050 mass% comprises; applying primary decarburization refining to molten iron from a blast furnace, then controlling the composition in the molten steel after primary decarburization refining to a range satisfying the following relation: Ämass%NÜ - 0.15 Ämass%CÜ ≥ 0.0060, subsequently conducting secondary decarburization refining to a ultra low carbon concentration region while suppressing denitridation using a vacuum degassing facility, then conducting deoxidation by Al and, further, controlling the composition such that Ämass%AlÜ . Ämass%NÜ ≤ 0.0004, N: 0.0050 to 0.0250 mass% and, preferably, with the amount of solid solute N being at a predetermined amount or more and then casting the molten steel continuously.
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公开(公告)号：AT260347T
公开(公告)日：2004-03-15
申请号：AT98118004
申请日：1998-09-23
Applicant: JFE STEEL CORP
Inventor： NABESHIMA SEIJI , TOZAWA HIROKAZU , SORIMACHI KENICHI
Abstract: Titanium killed steel sheets which are not troubled by nozzle clogging while they are produced in a continuous casting process, have few surface defects caused by cluster-type inclusions, and are highly rust resistant, and are formed from a melt of titanium killed steel that contains any one or two of Ca and metals REM in an amount of not smaller than 0.0005 % by weight, and wherein the steel contains major oxide inclusions of any one or two of CaO and REM oxides in an amount of from about 5 to 50 % by weight, Ti oxides in an amount of not larger than about 90 % by weight, and Al2O3 in an amount of not larger than about 70 % by weight.
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公开(公告)号：MX379391B
公开(公告)日：2025-03-10
申请号：MX2017006430
申请日：2017-05-17
Applicant: JFE STEEL CORP
Inventor： OTA HIROKI , YUGA MASAO , OKATSU MITSUHIRO , NABESHIMA SEIJI , ISHIGURO YASUHIDE
Abstract: Se proporciona una tubería de acero sin costura de alta resistencia para productos tubulares para campos petroleros que tiene resistencia al agrietamiento por corrosión de tensión por sulfuro superior. La tubería de acero sin costura contiene, en %masa, C: 0.20% hasta 0.50%, Si: 0.05% hasta 0.40%, Mn: 0.3% hasta 0.9%, Al: 0.005% hasta 0.1%, N: 0.006% o menos, Cr: más de 0.6% y 1.7% o menos, Mo: más de 1.0% y 3.0% o menos, V: 0.02% hasta 0.3%, Nb: 0.001% hasta 0.02%, B: 0.0003% hasta 0.0030%, O (oxígeno): 0.0030% o menos, y Ti: 0.003% hasta 0.025%, en el cual Ti/N: 2.0 hasta 5.0 se satisface, y la tubería de acero sin costura tiene una microestructura en la cual una fracción de volumen de una fase martensítica templada es 95% o más; los granos de austenita previa tienen un número de tamaño de grano de 8.5 o más; y en una sección transversal perpendicular a una dirección de laminado, el número de inclusiones basadas en nitruro que tienen un tamaño de partícula de 4 µm o más es 100 o menos por 100 mm2, el número de inclusiones basadas en nitruro que tienen un tamaño de partícula de menos de 4 µm es 1000 o menos por 100 mm2, el número de inclusiones basadas en óxido que tienen un tamaño de partícula de 4 µm o más es 40 o menos por 100 mm2, y el número de inclusiones basadas en óxido que tienen un tamaño de partícula de menos de 4 µm es 400 o menos por 100 mm2.
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Patent Agency Ranking
公开(公告)号：DK2801638T3
公开(公告)日：2021-06-28
申请号：DK12870014
申请日：2012-03-01
Applicant: JFE STEEL CORP
Inventor： YOKOTA TOMOYUKI , NABESHIMA SEIJI , NISHIMURA KIMIHIRO , MITAO SHINJI
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公开(公告)号：DE60113451D1
公开(公告)日：2005-10-20
申请号：DE60113451
申请日：2001-12-12
Applicant: JFE STEEL CORP
Inventor： NABESHIMA SEIJI , TAKEUCHI SHUJI , OGAWA HISASHI , NABESHIMA YUKI , MASUMOTO YASUYUKI
Abstract: A method of producing a high nitrogen, ultra low carbon steel suitable to rolling material for use in cold rolled steel sheets having excellent age hardening property by an age hardening treatment after forming by working, with no defects in slabs or steel sheets, reliably, at a reduced cost and with a high productivity is proposed. The method for producing a rolling material for use in ultra low carbon steel sheets at: C ≤ 0.0050 mass% comprises; applying primary decarburization refining to molten iron from a blast furnace, then controlling the composition in the molten steel after primary decarburization refining to a range satisfying the following relation: Ämass%NÜ - 0.15 Ämass%CÜ ≥ 0.0060, subsequently conducting secondary decarburization refining to a ultra low carbon concentration region while suppressing denitridation using a vacuum degassing facility, then conducting deoxidation by Al and, further, controlling the composition such that Ämass%AlÜ . Ämass%NÜ ≤ 0.0004, N: 0.0050 to 0.0250 mass% and, preferably, with the amount of solid solute N being at a predetermined amount or more and then casting the molten steel continuously.
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公开(公告)号：DE69821851T2
公开(公告)日：2004-12-09
申请号：DE69821851
申请日：1998-09-23
Applicant: JFE STEEL CORP
Inventor： NABESHIMA SEIJI , TOZAWA HIROKAZU , SORIMACHI KENICHI
Abstract: Titanium killed steel sheets which are not troubled by nozzle clogging while they are produced in a continuous casting process, have few surface defects caused by cluster-type inclusions, and are highly rust resistant, and are formed from a melt of titanium killed steel that contains any one or two of Ca and metals REM in an amount of not smaller than 0.0005 % by weight, and wherein the steel contains major oxide inclusions of any one or two of CaO and REM oxides in an amount of from about 5 to 50 % by weight, Ti oxides in an amount of not larger than about 90 % by weight, and Al2O3 in an amount of not larger than about 70 % by weight.
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9.发明公开
公开(公告)号：EP1342798A4
公开(公告)日：2004-06-30
申请号：EP01270629
申请日：2001-12-12
Applicant: JFE STEEL CORP
Inventor： NABESHIMA SEIJI , TAKEUCHI SHUJI , OGAWA HISASHI , NABESHIMA YUKI , MASUMOTO YASUYUKI
CPC classification number: C21C7/068 , C21C7/04 , C21C7/10 , C22C38/001 , C22C38/004 , C22C38/04
Abstract: A process by which a high-nitrogen ultralow-carbon steel which upon aging treatment after working/forming has excellent age-hardenability and which is suitable for use as a material for cold-rolled steel plates or sheets can be highly efficiently produced without fail at low cost without causing defects in slabs or steel plates or sheets. The process, which is for producing a rolling material for ultralow-carbon steel plates or sheets having a carbon content of 0.0050 mass% or lower, comprises: subjecting a hot metal from a blast furnace to primary decarburization/refining; regulating the molten steel which has undergone the primary decarburization/refining so as to satisfy the following relationship; [mass% N] - 0.15 [mass% C] >/= 0.0060 subjecting it to secondary decarburization/refining with a vacuum degassing apparatus until the carbon concentration reaches an ultralow-concentration region while inhibiting denitrification; subsequently deoxidizing the molten steel with aluminum; regulating the contents of aluminum and nitrogen so as to satisfy the relationships [mass% Al] [mass% N]
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公开(公告)号：EP3222740A4
公开(公告)日：2017-10-18
申请号：EP15860191
申请日：2015-08-20
Applicant: JFE STEEL CORP
Inventor： YUGA MASAO , ISHIGURO YASUHIDE , OKATSU MITSUHIRO , NABESHIMA SEIJI , OTA HIROKI
CPC classification number: C21D8/10 , C21D1/18 , C21D6/02 , C21D9/08 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
Abstract: Provided is a high-strength seamless steel pipe for oil country tubular goods having superior sulfide stress corrosion cracking resistance. The seamless steel pipe contains, by mass%, C: 0.20% to 0.50%, Si: 0.05% to 0.40%, Mn: 0.3% to 0.9%, Al: 0.005% to 0.1%, N: 0.006% or less, Cr: more than 0.6% and 1.7% or less, Mo: more than 1.0% and 3.0% or less, V: 0.02% to 0.3%, Nb: 0.001% to 0.02%, B: 0.0003% to 0.0030%, O (oxygen): 0.0030% or less, and Ti: 0.003% to 0.025%, in which Ti/N: 2.0 to 5.0 is satisfied, and the seamless steel pipe has a microstructure in which a volume fraction of a tempered martensitic phase is 95% or more; prior austenite grains have a grain size number of 8.5 or more; and in a cross-section perpendicular to a rolling direction, the number of nitride-based inclusions having a particle size of 4 µm or more is 100 or less per 100 mm 2 , the number of nitride-based inclusions having a particle size of less than 4 µm is 1000 or less per 100 mm 2 , the number of oxide-based inclusions having a particle size of 4 µm or more is 40 or less per 100 mm 2 , and the number of oxide-based inclusions having a particle size of less than 4 µm is 400 or less per 100 mm 2 .
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