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1. 发明公开

EP4335937A1 METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET 审中-实审
公开(公告)号：EP4335937A1
公开(公告)日：2024-03-13
申请号：EP22811428.6
申请日：2022-05-27
申请人： JFE Steel Corporation
发明人： IMAMURA, Takeshi , YOSHIKAWA, Ayaka , TAKENAKA, Masanori , TAMURA, Kazuaki
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , H01F1/147 , C23C22/00
摘要： To provide a method for producing a grain-oriented electrical steel sheet capable of stably obtaining good coating properties over the entire length and width of a steel sheet coil. Disclosed is a method for producing a grain-oriented electrical steel sheet, including subjecting a steel material containing, by mass%, Si: 2.0 % or more and 5.0 % or less, Mn: 0.01 % or more and 0.50 % or less, and one or both of S and Se: 0.001 % or more and 0.100 % or less in total, to hot rolling, followed by cold rolling once, or twice or more with intermediate annealing in between, followed by decarburization annealing, followed by application and drying of an annealing separator mainly composed of MgO, followed by final annealing, followed by flattening annealing, in which the final annealing is performed in an atmosphere where a flow rate of an atmospheric gas is 0.2 L/min or higher per tonne of steel sheet and a dew point is 10 °C or lower, the flattening annealing is accompanied by coating treatment including application of a coating solution, and prior to the application of the coating solution, pickling treatment is performed using an acid with a concentration of 1 % or more and 20 % or less at a temperature of 15 °C or higher for 1 second or more and 60 seconds or less.

2. 发明公开

EP3144400A1 METHOD FOR PRODUCING ORIENTED ELECTROMAGNETIC STEEL SHEET 有权
标题翻译： VERFAHREN ZUR HERSTELLUNG EINES ORIENTIGTEN ELEKTROMAGNETISCHEN STAHLBLECHS
公开(公告)号：EP3144400A1
公开(公告)日：2017-03-22
申请号：EP15793201.3
申请日：2015-05-11
申请人： JFE Steel Corporation
发明人： SUEHIRO, Ryuichi , TERASHIMA, Takashi , WATANABE, Makoto , TAKAMIYA, Toshito , IMAMURA, Takeshi
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , H01F1/16
摘要： In a method for producing a grain-oriented electrical steel sheet by subjecting a slab of an inhibitor-less ingredient system containing C: 0.002-0.10 mass%, Si: 2.5-6.0 mass%, Mn: 0.010-0.8 mass% and extremely decreased Al, N, Se and S to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within a range of 700-800°C in a heating process of the decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900°C is T2, a heating rate R1 between 500°C and T1 is set to not less than 100°C/s and a heating rate R2 between T1 and T2 is set to not more than 15°C/s, whereby a grain-oriented electrical steel sheet having excellent iron loss property and coating peeling resistance is obtained in the inhibitor-less ingredient system while ensuring decarburization property even when rapid heating is performed during the decarburization annealing.
摘要翻译：在通过使含有C：0.002〜0.10质量％，Si：2.5〜6.0质量％，Mn：0.010〜0.8质量％，Mn：0.010〜0.8质量％的无抑制剂成分体系的板坯进行制造的方法中， Al，N，Se和S进行热轧，热带退火，冷轧，脱碳退火，应用退火分离剂和最终退火，当一定温度在700-800℃的范围内，在脱碳加热过程中退火为T1，作为820-900℃范围内的均热温度的一定温度为T2，500℃和T1之间的加热速率R1设定为不低于100℃/ s，加热速率R2在 T1和T2设定为不高于15℃/ s，由此在无抑制剂成分体系中获得具有优异的铁损特性和耐剥离性的晶粒取向电工钢板，同时即使在快速加热时也能确保脱碳性能在脱碳退火期间进行 ING。

3. 发明授权

EP2460902B1 GRAIN-ORIENTED MAGNETIC STEEL SHEET 有权
标题翻译：晶粒取向电工钢板
公开(公告)号：EP2460902B1
公开(公告)日：2016-05-04
申请号：EP10804595.6
申请日：2010-07-30
申请人： JFE Steel Corporation
发明人： IMAMURA, Takeshi , SHINGAKI, Yukihiro , MURAKI, Mineo
IPC分类号： C22C38/00 , B21B3/02 , C22C38/14 , C22C38/60 , H01F1/16 , C21D8/12 , C21D9/46
CPC分类号： C22C38/02 , C21D8/12 , C21D8/1272 , C21D8/1283 , C21D9/46 , C21D2201/05 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/20 , C22C38/34 , H01F1/16

4. 发明公开

EP4353848A1 METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET 审中-实审
公开(公告)号：EP4353848A1
公开(公告)日：2024-04-17
申请号：EP22811382.5
申请日：2022-05-26
申请人： JFE Steel Corporation
发明人： TAKENAKA, Masanori , IMAMURA, Takeshi , TANAKA, Takaaki , YAMAGUCHI, Hiroi
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , H01F41/02
CPC分类号： Y02P10/20 , C22C38/00 , C21D8/12 , H01F41/02 , C22C38/60
摘要： In the production of a grain-oriented electrical steel sheet by heating a steel slab containing, in mass%, C: 0.02 to 0.10%, Si: 2.5 to 5.5%, Mn: 0.01 to 0.30%, S: 0.0010 to 0.040%, Se: 0 to 0.040%, sol. Al: 0.010 to 0.040%; and N: 0.004 to 0.020% to 1300°C or higher; subsequently performing hot rolling, hot-band annealing as necessary, cold rolling to obtain a cold-rolled sheet with a final sheet thickness, and primary recrystallization annealing which also serves as decarburization annealing; applying an annealing separator on the surface of the steel sheet; and performing finishing annealing, edge cracks that may occur in the hot rolling are effectively prevented by keeping a slab lateral face temperature T at a time of starting rough rolling during the hot rolling equal to or lower than a temperature Te defined by Expression (1) as follows Te = -120000 [%S]2 + 1400 (1) and carrying out width reduction after at least one pass in the rough rolling.

5. 发明公开

EP4335939A1 METHOD FOR MANUFACTURING ORIENTED ELECTRICAL STEEL SHEET 审中-实审
公开(公告)号：EP4335939A1
公开(公告)日：2024-03-13
申请号：EP22816009.9
申请日：2022-05-27
申请人： JFE Steel Corporation
发明人： TAKENAKA, Masanori , IMAMURA, Takeshi , TAKAHASHI, Mari , FUJITA, Noriki
IPC分类号： C21D8/12 , C22C38/00 , C22C38/60 , H01F1/147
摘要： Proposed is a method for producing a grain-oriented electrical steel sheet having no occurrence of ridging and an excellent shape. The method for producing a grain-oriented electrical steel sheet includes: heating a steel slab containing, in mass%, C: 0.02 to 0.10%, Si: 2.5 to 5.5%, Mn: 0.01 to 0.30%, sol. Al: 0.010 to 0.040%, and N: 0.004 to 0.020%, and at least one of S and Se in a total amount of 0.0010 to 0.040%; subsequently performing hot rolling; performing hot-band annealing as necessary; performing cold rolling either once or two or more times with intermediate annealing between each rolling to obtain a cold-rolled sheet having a final sheet thickness; performing primary recrystallization annealing which also serves as decarburization annealing; and performing finishing annealing. In the method for producing a grain-oriented electrical steel sheet, the heating temperature for the slab is 1300°C or higher. In the rough rolling of the hot rolling, one of rolling passes is performed in the temperature range of 1200°C or higher, and subsequently, a next rolling pass is performed in an opposite direction after a time interval of 5 seconds or longer, with a total rolling reduction of the rough rolling achieved 75% or higher.

6. 发明公开

EP3778930A1 METHOD FOR MANUFACTURING THE GRAIN ORIENTED ELECTRICAL STEEL SHEET 审中-公开
公开(公告)号：EP3778930A1
公开(公告)日：2021-02-17
申请号：EP20197738.6
申请日：2011-08-04
申请人： JFE STEEL CORPORATION
发明人： SHINGAKI, Yukihiro , MAKIISHI, Noriko , IMAMURA, Takeshi
IPC分类号： C21D8/12
摘要： The present invention proposes measures to decrease noise generated by an iron core of a transformer when grain oriented electrical steel sheets each having realized low iron loss through magnetic domain refinement are stacked to constitute the iron core. Specifically, the present invention proposes a method for manufacturing a grain oriented electrical steel sheet, comprising: subjecting a grain oriented electrical steel sheet comprising 2.0 mass% to 8.0 mass% Si and having a forsterite film on a steel sheet surface to flattening annealing at 800°C or higher wherein an in-furnace tension during flattening annealing is 10 MPa or less, and subjecting the grain oriented electrical steel sheet to magnetic domain refinement after final annealing such that thermal strain is introduced in a linear like manner in a direction intersecting a rolling direction of the steel sheet, with magnetic domain refinement interval D (mm) in the rolling direction, from a side of the steel sheet corresponding to the winding outer peripheral side of a coiled steel sheet at the stage of the final annealing, such that a deflection of the grain oriented electrical steel sheet is 3 mm or less per unit length: 500 mm in the rolling direction of the steel sheet,

7. 发明授权

EP3144400B1 METHOD FOR PRODUCING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET 有权
公开(公告)号：EP3144400B1
公开(公告)日：2020-01-01
申请号：EP15793201.3
申请日：2015-05-11
申请人： JFE Steel Corporation
发明人： SUEHIRO, Ryuichi , TERASHIMA, Takashi , WATANABE, Makoto , TAKAMIYA, Toshito , IMAMURA, Takeshi
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , H01F1/16 , C21D3/04 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/32 , C22C38/34 , H01F1/03 , H01F41/02

8. 发明授权

EP2778245B1 ULTRATHIN ELECTROMAGNETIC STEEL SHEET 有权
公开(公告)号：EP2778245B1
公开(公告)日：2019-04-24
申请号：EP12848485.4
申请日：2012-11-06
申请人： JFE Steel Corporation
发明人： IMAMURA, Takeshi , TAKASHIMA, Minoru , HIRATANI, Tatsuhiko
IPC分类号： C22C38/00 , B21B3/02 , C22C38/04 , C22C38/60 , H01F1/16 , C21D8/12 , C21D1/74 , C21D1/76 , C21D6/00 , C21D9/46 , C23C10/08 , C22C38/02 , C22C38/06 , C22C38/12

9. 发明公开

EP2602342A1 GRAIN-ORIENTED MAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING SAME 审中-公开
标题翻译：晶粒取向的磁性钢板及其生产方法
公开(公告)号：EP2602342A1
公开(公告)日：2013-06-12
申请号：EP11814305.6
申请日：2011-08-04
申请人： JFE Steel Corporation
发明人： SHINGAKI, Yukihiro , MAKIISHI, Noriko , IMAMURA, Takeshi
IPC分类号： C22C38/00 , B23K15/00 , B23K26/00 , C21D8/12 , C22C38/04 , C22C38/60 , H01F1/16
CPC分类号： H01F41/00 , C21D8/12 , C21D8/1216 , C21D8/1272 , C21D9/46 , C22C38/02 , C22C38/04 , C23C2/24 , C23C26/00 , H01F1/01 , H01F1/16
摘要： The present invention proposes measures to decrease noise generated by an iron core of a transformer when grain oriented electrical steel sheets each having realized low iron loss through magnetic domain refinement are stacked to constitute the iron core. Specifically, the present invention proposes a grain oriented electrical steel sheet having the total length of cracks in film on a steel sheet surface, of 20 µm or less per 10000 µm 2 of the film, the steel sheet comprising: a predetermined magnetic domain refinement interval in a rolling direction of the steel sheet, provided in magnetic domain refinement through linear like introduction of thermal strain in a direction intersecting the rolling direction; and deflection of 3 mm or less per unit length: 500 mm in the rolling direction of the steel sheet.
摘要翻译：本发明提出了当通过磁畴细化实现低铁损的晶粒取向电工钢片堆叠以构成铁芯时降低由变压器的铁芯产生的噪声的措施。具体地说，本发明提出了一种晶粒取向电工钢板，该钢板在钢板表面上膜的裂纹全长为每10000μm2膜20μm或更小，所述钢板包括：预定的磁畴细化区间通过在与轧制方向交叉的方向上引入热应变的线状引入而进行磁畴细化的钢板的轧制方向; 每单位长度3mm以下的挠曲：在钢板的轧制方向上为500mm。

10. 发明公开

EP4053296A1 GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME 审中-公开
公开(公告)号：EP4053296A1
公开(公告)日：2022-09-07
申请号：EP20880561.4
申请日：2020-10-27
申请人： JFE Steel Corporation
发明人： WATANABE, Makoto , SUEMUNE, Masahiro , IMAMURA, Takeshi
IPC分类号： C21D8/12 , C22C38/00 , C22C38/04 , C22C38/60 , H01F1/147 , C23C22/00
摘要： In a production of a grain-oriented electrical steel sheet comprising hot rolling a raw steel material containing Si: 2.5 to 4.5 mass%, cold rolling, decarburization annealing, applying an annealing separator composed mainly of MgO, finish annealing and magnetic domain subdividing, the annealing separator to be used includes compounds of Sn, Sb, Mo and W by 0.3 to 5 mass% as converted to a metal, and the finish annealing is conducted by holding the steel sheet at a temperature of 800 to 950°C for 10 to 100 hours under an inert atmosphere and passing a dry gas containing not less than 1 vol% of H 2 and having a dew point of not higher than 10°C so as to reach a furnace pressure of not less than 3.5 mmH 2 O from not lower than 1050°C to a purification treatment temperature, so that a pickling weight loss of undercoat film by pickling with HCl is not more than 1.8 g/m 2 and the total concentration of Sn, Sb, Mo, and W on a boundary face between the film and iron matrix is 0.01 to 0.15 mass%, whereby a grain-oriented electrical steel sheet having an excellent film adhesiveness is obtained even when the magnetic domain subdividing treatment is performed at a high energy density.

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