公开(公告)号：EP4382241A1

公开(公告)日：2024-06-12

申请号：EP22212542.9

申请日：2022-12-09

申请人： Institut Polytechnique Unilasalle ,  Université de Picardie Jules Verne ,  Lasea Belgium ,  Institut de Recherche Technologique Matériaux, Métallurgie, Procédés ,  Multitel ASBL ,  Jeumont Electric ,  Universidad Carlos III de Madrid ,  Fraunhofer-Institut für Produktionstechnologie IPT

发明人： PINEAU, Camille ,  BIRAT, Jean-Pierre ,  DUPONT, Prescillia ,  PLOYARD, Maxime ,  HENROTTIN, Anne ,  PATARS, Jérôme ,  DECULTOT, Marc ,  DUPUY, Julien ,  HERNANDEZ, Yves ,  MIAZEK, Alexandre ,  VELASCO LOPEZ, Fransisco Javier ,  MALOBERTI, Olivier ,  PANIER, Stéphane ,  NESSER, Manar ,  ZECHEL, Fabian

IPC分类号： B23K26/0622 ,  B23K26/364 ,  C21D8/12 ,  H01F1/16 ,  C21D6/00 ,  C21D9/46

CPC分类号： B23K26/0624 ,  H01F1/16 ,  C21D8/1294 ,  B23K26/364 ,  C21D8/1261 ,  C21D9/46 ,  C21D8/1272 ,  C21D6/008

摘要： A process for manufacturing an electrical steel sheet, the process comprising :
a- providing a sheet of laminated electrical steel having a first and a second surface, a rolling direction or at least one easy magnetization direction(s), and a characteristic time for heat diffusion;
b- forming a plurality of grooves on at least one of the first and second surfaces with at least one pass of a pulsed laser, each pass being associated with a scanning direction, the laser having a laser pulse repetition frequency, a pulse duration and emitting a light at a laser wavelength with a peak power density and a cumulative energy density per pass, the process being characterised in that :
i) the laser pulse duration is equal to or less than a heat diffusion characteristic time of the electrical steel;
ii) the peak power density is more than 50 TW/cm2 or/ and the product between the peak power density and the pulse repetition frequency is more than 5000 TW/cm2/ms.
iii) the cumulative energy density per laser pass is comprised between 10 J/cm2 and 3500 J/cm2.

公开(公告)号：EP2602346B1

公开(公告)日：2018-12-12

申请号：EP11814322.1

申请日：2011-08-05

申请人： JFE Steel Corporation

发明人： OMURA, Takeshi ,  INOUE, Hirotaka ,  YAMAGUCHI, Hiroi ,  OKABE, Seiji

IPC分类号： C21D9/46 ,  C23C22/00 ,  C21D8/12 ,  H01F1/18 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  B21B3/02 ,  C22C38/34

CPC分类号： H01F41/00 ,  B21B3/02 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1288 ,  C21D8/1294 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/34 ,  H01F1/18 ,  Y10T428/2457 ,  Y10T428/24612

摘要： A grain oriented electrical steel sheet is provided where thickness of forsterite film at bottom portions of grooves formed on a surface of the steel sheet is ‰¥ 0.3 µm, groove frequency is ‰¤ 20%, which is abundance ratio of grooves crystal grains directly beneath themselves, each crystal grain having orientation deviating from Goss orientation by ‰¥ 10° and grain size ‰¥ 5 µm, total tension exerted on the steel sheet in rolling direction by forsterite film and tension coating is ‰¥ 10.0 MPa, total tension exerted on the steel sheet in direction perpendicular to rolling direction by forsterite film and tension coating is ‰¥ 5.0 MPa and the total tensions satisfy where A is total tension exerted in rolling direction by forsterite film and tension coating, and B is total tension exerted in direction perpendicular to rolling direction by forsterite film and tension coating.

公开(公告)号：EP3406743A1

公开(公告)日：2018-11-28

申请号：EP17741654.2

申请日：2017-01-18

申请人： Posco

发明人： HONG, Seong Cheol ,  MIN, Ki Young ,  LEE, Gyoo Taek ,  PARK, Se min ,  KWON, Oh Yeoul ,  KIM, Jae Kyoum

IPC分类号： C21D8/12 ,  C21D10/00 ,  B23K26/352 ,  B23K26/354 ,  B23K26/364 ,  B23K26/08 ,  B23K26/16 ,  B23K26/70 ,  B23K37/047 ,  B23K26/12 ,  B23K26/32 ,  B23K26/142

CPC分类号： B23K26/70 ,  B23K26/0846 ,  B23K26/16 ,  B23K26/364 ,  C21D8/12 ,  C21D8/1277 ,  C21D8/1294 ,  C21D10/00

摘要： By optimizing equipment and processing, magnetic domain miniaturization efficiency can be increased, workability can be improved, and processing ability can be increased through same. Provided is a method for miniaturizing the magnetic domains of a directional electric steel plate, the method comprising: a steel plate supporting roll position adjusting step of controlling the vertical direction position of a steel plate while supporting the steel plate progressing along a production line; and a laser emitting step of melting the steel plate by emitting a laser beam to form grooves on the surface of the steel plate and a removing steel plate surface step of to remove remaining spatters dropped on the surface of the steel plate after the laser emitting.

公开(公告)号：EP3263720A4

公开(公告)日：2018-03-07

申请号：EP16754930

申请日：2016-02-12

申请人： JFE STEEL CORP

发明人： TAKAJO SHIGEHIRO ,  OMURA TAKESHI ,  OKABE SEIJI

IPC分类号： C21D8/12 ,  C21D9/46 ,  H01F1/16

CPC分类号： C21D8/1294 ,  C21D8/12 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F27/245

摘要： Disclosed are a grain-oriented electrical steel sheet exhibiting low iron loss and low noise properties when incorporated in a transformer, and a production method therefor. The steel sheet has strain regions locally present in a surface layer thereof and formed to extend in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region formed continuously over 200 mm in a width direction and whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: W max / W min = 1.2 or more and less than 2.5, where W max and W min respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; W ave being 80 µm or more, where W ave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 µm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and ( W ave * D )/ s being 0.0007 mm or more and 0.0016 mm or less.

公开(公告)号：EP3263720A1

公开(公告)日：2018-01-03

申请号：EP16754930.2

申请日：2016-02-12

申请人： JFE Steel Corporation

发明人： TAKAJO, Shigehiro ,  OMURA, Takeshi ,  OKABE, Seiji

IPC分类号： C21D8/12 ,  C21D9/46 ,  H01F1/16

CPC分类号： C21D8/1294 ,  C21D8/12 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F27/245

摘要： Disclosed are a grain-oriented electrical steel sheet exhibiting low iron loss and low noise properties when incorporated in a transformer, and a production method therefor. The steel sheet has strain regions locally present in a surface layer thereof and formed to extend in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region formed continuously over 200 mm in a width direction and whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: W max / W min = 1.2 or more and less than 2.5, where W max and W min respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; W ave being 80 µm or more, where W ave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 µm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and ( W ave * D )/ s being 0.0007 mm or more and 0.0016 mm or less.

摘要翻译： 本发明提供一种组装于变压器时显示低铁损，低噪音特性的晶粒取向电工钢板及其制造方法。 该钢板在其表层局部存在应变区域，并且在轧制方向上以间隔s（mm）在与轧制方向垂直的方向上延伸地形成。 每个应变区具有在宽度方向上连续形成200mm的闭合区域区域，并且其在轧制方向上的宽度在钢板表面上周期性变化。 每个闭合区域区域满足：Wmax / Wmin = 1.2以上且小于2.5，其中Wmax和Wmin分别表示在轧制方向上测量的钢板表面上的最大宽度和最小宽度; 波形为80μm以上，其中Wave表示在轧制方向上测量的钢板表面上的平均宽度; D为32μm以上，其中D表示在板厚度方向上测量的最大深度; （波* D）/秒为0.0007mm以上且0.0016mm以下。

公开(公告)号：EP3239325A4

公开(公告)日：2017-12-27

申请号：EP15873582

申请日：2015-12-21

申请人： POSCO

发明人： KWON OH-YEOUL ,  LEE WON-GUL ,  HONG SEONG-CHEOL ,  LEE GYOO-TAEK ,  PARK JONG-TAE ,  LIM CHOONG SOO

IPC分类号： C22C38/02 ,  B23K26/36 ,  C21D1/74 ,  C21D8/12 ,  C23C8/18

CPC分类号： C21D8/1283 ,  B23K26/36 ,  B23K26/364 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1294 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/02 ,  C23C8/02 ,  C23C8/18 ,  C23C8/26 ,  C23C8/80

摘要： A grain-oriented electrical steel plate of an exemplary embodiment of the present invention has a groove formed on a surface, wherein a curvature radius RBb at a position where a depth of the groove is maximum is 0.2 µm to 100 µm, and a curvature radius RSb on the groove surface from the position where the depth of the groove is maximum to a quarter-way position of the depth D of the groove is 4 µm to 130 µm.

公开(公告)号：EP2891726B1

公开(公告)日：2017-11-01

申请号：EP13834271.2

申请日：2013-08-29

申请人： JFE Steel Corporation

发明人： TAKAJO, Shigehiro ,  YAMAGUCHI, Hiroi ,  OKABE, Seiji ,  HANAZAWA, Kazuhiro

IPC分类号： C21D6/00 ,  C21D8/12 ,  C22C38/00 ,  H01F1/147 ,  C21D9/46 ,  C21D9/34 ,  H01F1/16 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/60 ,  C21D1/34

CPC分类号： H01F1/14775 ,  C21D1/34 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/1244 ,  C21D8/1283 ,  C21D8/1294 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/60 ,  H01F1/16

摘要： According to the present invention, a grain-oriented electrical steel sheet for iron cores exhibiting excellent transformer iron loss properties in an excitation range from 1.5 T to 1.9 T is provided, in which a residual stress of 150 MPa or more is formed near strain regions, each extending 300 µm or less in the rolling direction and 42 µm or more in the sheet thickness direction, and the strain regions are formed periodically at intervals of 2 mm to 10 mm in the rolling direction, with reduced energy loss in transformers in operation.

公开(公告)号：EP3205738A4

公开(公告)日：2017-08-30

申请号：EP15848835

申请日：2015-10-05

申请人： JFE STEEL CORP

发明人： SUEHIRO RYUICHI ,  TERASHIMA TAKASHI ,  TAKAMIYA TOSHITO ,  WATANABE MAKOTO ,  UESAKA MASANORI

IPC分类号： C22C38/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/60 ,  H01F1/147 ,  H01F1/16

CPC分类号： C21D9/46 ,  C21D8/005 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1288 ,  C21D8/1294 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/54 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

摘要： In the manufacture of a grain oriented electrical steel sheet by subjecting an Si-containing steel slab to hot rolling, cold rolling, primary recrystallization annealing, finish annealing and formation of a tension coating, the sheet is subjected to a temperature holding treatment at a temperature T within a range of 250-600°C for 1-10 seconds in a heating process of the primary recrystallization annealing and then heated from the temperature T to 700°C at a rate of not less than 80°C/s and from 700°C to a soaking temperature at a rate of not more than 15°C/s, wherein an oxygen potential from 700°C to the soaking temperature is 0.2-0.4 and an oxygen potential during the soaking is 0.3-0.5 and an area ratio of secondary recrystallized grains is not less than 90% when an angle ± deviated from {110} ideal orientation is less than 6.5° and an area ratio is not less than 75% when a deviation angle P is less than 2.5° and an average length [L] in the rolling direction is not more than 20 mm and an average value [²] of the angle P (°) is 15.63 x [²] + [L]

摘要翻译： 在通过对含Si钢坯进行热轧，冷轧，一次再结晶退火，最终退火和形成拉伸涂层来制造取向性电磁钢板时，将该钢板在一定温度下进行保温处理 T在250〜600℃的范围内进行1〜10秒钟的热处理，然后以80℃/秒以上的温度从温度T升温至700℃，从700℃ ℃至均热温度以不超过15℃/ s的速率进行，其中700℃至均热温度的氧势为0.2-0.4，并且在均热过程中氧势为0.3-0.5，面积比 当偏离角P小于2.5°时，从{110} <001>理想取向的偏离角±小于6.5°，面积比不小于75％时，二次再结晶晶粒的比例不小于90％; 轧制方向的平均长度[L]不是mo 大于20mm，并且角度P（°）的平均值[²]为15.63×[²] + [L] <44.06，由此获得具有良好铁损特性的取向性电磁钢板。

公开(公告)号：EP3196319A1

公开(公告)日：2017-07-26

申请号：EP14900411.1

申请日：2014-12-10

申请人： Posco

发明人： SHIM, Ho-Kyung

IPC分类号： C21D8/12 ,  B23K26/352

CPC分类号： C21D9/46 ,  B23K26/0643 ,  B23K26/082 ,  B23K26/352 ,  B23K26/702 ,  C21D6/008 ,  C21D8/1294 ,  H01F27/245 ,  H01F41/0233

摘要： Disclosed is a magnetic domain refining method for radiating a laser beam to a surface of a directional electrical steel plate at intervals, which is capable of further reducing noise along with an iron loss reduction effect and further improving iron loss and noise reduction effects in an area where the directional electrical steel plate are bonded together, such as the joint part of the iron core of a transformer. Irradiated radiations formed by a laser beam in at least any one area of the directional electrical steel plate are unfolded in a fan rib form using one point of the directional electrical steel plate as a central point.

摘要翻译： 本发明公开了一种磁畴细化方法，用于间隔地向定向电磁钢板的表面照射激光束，该方法能够进一步降低噪声以及铁损降低效果，并进一步改善区域中的铁损和噪声降低效果 定向电工钢板粘接在一起，如变压器铁芯的接头部分。 在定向电工钢板的至少任意一个区域内由激光束形成的辐照射线以定向电工钢板的一个点作为中心点以扇形肋的形式展开。

公开(公告)号：EP2602346A4

公开(公告)日：2017-06-07

申请号：EP11814322

申请日：2011-08-05

申请人： JFE STEEL CORP

发明人： OMURA TAKESHI ,  INOUE HIROTAKA ,  YAMAGUCHI HIROI ,  OKABE SEIJI

IPC分类号： C22C38/00 ,  B21B3/02 ,  C21D8/12 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/34 ,  C22C38/60 ,  C23C22/00 ,  H01F1/16 ,  H01F1/18

CPC分类号： H01F41/00 ,  B21B3/02 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1288 ,  C21D8/1294 ,  C22C38/00 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/34 ,  H01F1/18 ,  Y10T428/2457 ,  Y10T428/24612

摘要： A grain oriented electrical steel sheet is provided where thickness of forsterite film at bottom portions of grooves formed on a surface of the steel sheet is ‰¥ 0.3 µm, groove frequency is ‰¤ 20%, which is abundance ratio of grooves crystal grains directly beneath themselves, each crystal grain having orientation deviating from Goss orientation by ‰¥ 10° and grain size ‰¥ 5 µm, total tension exerted on the steel sheet in rolling direction by forsterite film and tension coating is ‰¥ 10.0 MPa, total tension exerted on the steel sheet in direction perpendicular to rolling direction by forsterite film and tension coating is ‰¥ 5.0 MPa and the total tensions satisfy where A is total tension exerted in rolling direction by forsterite film and tension coating, and B is total tension exerted in direction perpendicular to rolling direction by forsterite film and tension coating.

摘要翻译： 本发明提供一种取向性电磁钢板，其特征在于，在钢板表面形成的槽的底部的镁橄榄石被膜的厚度为0.3μm以上，沟频率为20％以下，沟槽晶粒的正下方的存在比例 每个晶粒的方位偏离戈斯方位‰10°，晶粒尺寸≧5微米，由镁橄榄石膜和拉伸涂层对钢板的轧制方向施加的总张力为≥10.0兆帕，总张力施加于 在由镁橄榄石膜和张力涂层垂直于轧制方向的方向上的钢板≥5.0MPa并且总张力满足，其中A是由镁橄榄石膜和拉伸涂层在轧制方向上施加的总张力，B是在垂直方向上施加的总张力 通过镁橄榄石膜和拉伸涂层进行轧制方向。