公开(公告)号：US20140374137A1

公开(公告)日：2014-12-25

申请号：US14369571

申请日：2012-11-15

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Won-Gul Lee ,  Chan-Hee Han ,  Hyun-Chul Park

IPC分类号： H01B5/00 ,  B23K26/14 ,  H01F3/02 ,  B23K26/073 ,  H01B1/02 ,  B23K26/00 ,  B23K26/06

CPC分类号： H01B5/002 ,  B23K26/0643 ,  B23K26/0736 ,  B23K26/354 ,  B23K26/355 ,  C21D8/1288 ,  C21D8/1294 ,  C21D2201/05 ,  H01B1/02 ,  H01F3/02

摘要： A method for manufacturing an electrical steel sheet is provided. The method for manufacturing an electrical steel sheet includes forming a groove having first and second side surfaces and a bottom surface by melting a surface of a steel sheet by laser irradiation, and forming an opening by removing melted byproducts of the steel sheet formed on the first and second side surfaces and the bottom surface through air blowing or suctioning to expose at least one surface of the first side surface, the second side surface, and the bottom surface in the forming of the groove.

摘要翻译： 提供一种电工钢板的制造方法。 制造电工钢板的方法包括通过激光照射来形成具有第一和第二侧表面的槽和底表面，并且通过除去第一和第二表面上形成的钢板的熔融副产物形成开口 第二侧表面和底表面通过空气吹送或抽吸，以在形成凹槽时露出第一侧表面，第二侧表面和底表面的至少一个表面。

公开(公告)号：US12051529B2

公开(公告)日：2024-07-30

申请号：US17415815

申请日：2019-12-18

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Woo-Sin Kim ,  Jong-Tae Park

IPC分类号： H01F1/16 ,  B23K26/364 ,  H01F41/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46

CPC分类号： H01F1/16 ,  B23K26/364 ,  H01F41/0233 ,  C21D6/008 ,  C21D8/1233 ,  C21D8/1272 ,  C21D9/46

摘要： A manufacturing method of a grain-oriented electrical steel sheet according to an embodiment of the present invention, includes: manufacturing a cold-rolled sheet; forming a groove by irradiating a laser beam on the cold-rolled sheet; and partially removing an oxide layer formed on a surface of the cold-rolled sheet so that a thickness of the oxide layer remains at 1 to 5 nm, wherein the grain-oriented electrical steel sheet has islands of 0.25 or less having sphericity of 0.5 to 0.9 under the oxide layer under the groove.

公开(公告)号：US10815545B2

公开(公告)日：2020-10-27

申请号：US15539960

申请日：2015-12-21

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Won-Gul Lee ,  Seong-Cheol Hong ,  Gyoo-Taek Lee ,  Jong-Tae Park ,  Choong Soo Lim

IPC分类号： B23K26/364 ,  C21D8/12 ,  C23C8/26 ,  C22C38/02 ,  C23C8/02 ,  B23K26/0622 ,  C23C8/80 ,  B23K26/08 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C21D9/46 ,  C23C8/18 ,  B23K103/04 ,  B23K101/36 ,  B23K101/18 ,  B23K101/34 ,  B23K101/16

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：US11772199B2

公开(公告)日：2023-10-03

申请号：US17705987

申请日：2022-03-28

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Se-Min Park ,  Jong-Tae Park ,  Won-Gul Lee

IPC分类号： B23K26/364 ,  B23K26/16 ,  C21D1/18 ,  C21D3/04 ,  C21D9/46 ,  C21D8/12

CPC分类号： B23K26/364 ,  B23K26/16 ,  C21D1/18 ,  C21D3/04 ,  C21D9/46 ,  C21D8/1283 ,  C21D8/1294 ,  C22C2204/00

摘要： A grain-oriented electrical steel sheet incudes a groove formed on a surface and a solidified alloy layer formed under the groove, wherein the solidified alloy layer includes particles of a certain average diameter.

公开(公告)号：US20230060105A1

公开(公告)日：2023-02-23

申请号：US17785705

申请日：2020-12-18

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Woo-Sin Kim ,  Dae-Uk Kim ,  Jong-Tae Park

IPC分类号： C21D9/46 ,  C21D8/02

摘要： A grain-oriented electrical steel sheet according to an embodiment of the present invention has an average degree of orientation difference of 0.5 to 10° between recrystallized grains that are in contact with a groove present on the surface of the electrical steel sheet and the bottom of the groove, and other recrystallized grains.

公开(公告)号：US12084736B2

公开(公告)日：2024-09-10

申请号：US17415824

申请日：2019-12-18

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Woo-Sin Kim ,  Dae-Uk Kim ,  Jong-Tae Park

IPC分类号： C21D8/12 ,  H01F1/16 ,  H01F27/245 ,  H01F41/02

CPC分类号： C21D8/1233 ,  C21D8/1272 ,  C21D8/1283 ,  H01F1/16 ,  H01F27/2455 ,  H01F41/024

摘要： A manufacturing method of a grain-oriented electrical steel sheet according to an embodiment of the present invention includes: manufacturing a cold-rolled sheet; forming a groove in the cold-rolled sheet; removing an Fe—O oxide formed on a surface of the cold-rolled sheet; primary recrystallization annealing the cold-rolled sheet; and applying an annealing separating agent to the primary recrystallized cold-rolled sheet, and secondary recrystallization annealing it, wherein a close contacting property coefficient calculated by Formula 1 below is 0.016 to 1.13.

close contacting property coefficient (Sad)=(0.8×R)/Hhill-up  [Formula 1]

(In Formula 1, R represents the average roughness (μm) of the surface of the cold-rolled sheet after the removing of the oxide, and Hhill-up represents the average height (μm) of the hill-up present on the surface of the cold-rolled sheet after the removing of the oxide.).

公开(公告)号：US11318562B2

公开(公告)日：2022-05-03

申请号：US16472552

申请日：2017-12-20

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Se-Min Park ,  Jong-Tae Park ,  Won-Gul Lee

IPC分类号： B32B3/30 ,  B23K26/364 ,  B23K26/16 ,  C21D1/18 ,  C21D3/04 ,  C21D9/46

摘要： A grain-oriented electrical steel sheet includes a groove formed on a surface and a solidified alloy layer formed under the groove, wherein the solidified alloy layer includes particles of a certain average diameter.

公开(公告)号：US11313011B2

公开(公告)日：2022-04-26

申请号：US16472484

申请日：2017-12-20

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Ki-Young Min ,  Se-Min Park ,  Jong-Tae Park ,  Seong-Cheol Hong

IPC分类号： C21D10/00 ,  B23K26/0622 ,  B23K26/364 ,  B23K26/073 ,  C21D3/04 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  B23K103/04

摘要： A method for refining magnetic domains of a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes: a step of preparing a grain-oriented electrical steel sheet; and a step of forming a groove by irradiating a quasi-continuous laser beam of which a duty is from 98.0 to 99.9% on a surface of the grain-oriented electrical steel sheet.

公开(公告)号：US11180819B2

公开(公告)日：2021-11-23

申请号：US15539637

申请日：2015-12-21

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Seung Gon Lee ,  Hyun-Chul Park ,  Jung Hun Park ,  Seong-Kyu See ,  Sung-Yeun Won ,  Jae-Kyoum Kim ,  Jong-Tae Park ,  Se Min Park

IPC分类号： B32B3/30 ,  C21D8/12 ,  H01F1/18 ,  C22C38/00 ,  B23K26/40 ,  B23K26/0622 ,  B23K26/364 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C8/18 ,  B23K101/34 ,  B23K103/04

摘要： Provided is an oriented electrical steel sheet including a groove existing on the surface of the electrical steel sheet and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, in which forsterite which is extended from the forsterite layer and penetrates to a base steel sheet in an anchor form is present on the surface of the side of the groove.

公开(公告)号：US20210317545A1

公开(公告)日：2021-10-14

申请号：US17272094

申请日：2019-05-23

申请人： POSCO

发明人： Oh-Yeoul Kwon ,  Jong-Tae Park ,  Woo-Sin Kim ,  Chang-Ho Kim ,  Hyun-Chul Park ,  Won-Gul Lee ,  Oho-Cheal Kwon

IPC分类号： C21D10/00 ,  C21D8/12 ,  H01F1/18 ,  C23C22/20 ,  C23C22/22 ,  C22C38/00

摘要： An embodiment of the present invention provides a grain-oriented electrical steel sheet, including: a linear groove formed in a direction crossing a rolling direction on one surface or both surfaces of an electrical steel sheet; and a linear thermal shock portion formed in the direction crossing the rolling direction on one surface or both surfaces of the electrical steel sheet. The groove is formed in plural along the rolling direction, a distance D2 between the groove and the thermal shock portion is 0.2 to 0.5 times a distance D1 between the grooves, and a distance D3 between the thermal shock portions is 0.2 to 3.0 times the distance D1 between the grooves.