公开(公告)号：US09997283B2

公开(公告)日：2018-06-12

申请号：US14963625

申请日：2015-12-09

Applicant: POSCO

Inventor： Kyu-Seok Han ,  Jae-Soo Lim ,  Byung-Deug Hong ,  Chan-Hee Han

IPC: C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C21D8/12 ,  H01F1/147 ,  H01F1/16 ,  H01F1/01 ,  C22C38/00 ,  C30B29/52

CPC classification number: H01F1/01 ,  C21D8/12 ,  C21D8/1244 ,  C21D8/1272 ,  C21D2201/05 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C30B29/52

Abstract: Provided is a grain-oriented electric steel sheet having superior magnetic property and to a grain-oriented electric steel sheet including 2.0 to 4.5 weight % of Si, 0.001 to 0.10 weight % of C, 0.010 weight % or lower of Al, 0.08 weight % or lower of Mn, 0.005 weight % or lower of N, 0.002 to 0.050 weight % of S, the remainder being Fe and other unavoidable impurities. The steel sheet having been subjected to secondary recrystallization using at least any one of grain boundary-segregated elementary S and an FeS precipitate as a grain growth inhibitor.

公开(公告)号：US11608540B2

公开(公告)日：2023-03-21

申请号：US16472249

申请日：2017-12-21

Applicant: POSCO

Inventor： Chang Soo Park ,  Kyu-Seok Han ,  Hyung Don Joo ,  Jae Kyoum Kim ,  Woo-Sin Kim

IPC: C21D9/46 ,  C21D1/74 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16

Abstract: A grain-oriented electrical steel sheet of an embodiment of the present invention comprises Si: 1.0% to 7.0% and Y: 0.005% to 0.5% by wt %, and the remainder comprising Fe and other inevitable impurities, and 10 pieces or less of inclusions comprising Y and having a diameter of 30 nm to 5 μm per area of 1 mm2.

公开(公告)号：US10760141B2

公开(公告)日：2020-09-01

申请号：US15536254

申请日：2014-12-16

Applicant: POSCO

Inventor： Hyung Don Joo ,  Hyung-Ki Park ,  Jin-Wook Seo ,  Kyu-Seok Han ,  Jae-Soo Lim ,  Hyun-Seok Ko

IPC: C21D9/46 ,  C22C38/02 ,  C21D8/12 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06

Abstract: An oriented electrical steel sheet includes Ba at about 0.005 wt % to about 0.5 wt % inclusive, Y at about 0.005 wt % to about 0.5 wt % inclusive, or a composite of Ba and Y at about 0.005 wt % to about 0.5 wt % inclusive, the remainder including Fe and impurities, based on 100 wt % of a total composition of a base steel sheet thereof.

公开(公告)号：US20160133365A1

公开(公告)日：2016-05-12

申请号：US14963625

申请日：2015-12-09

Applicant: POSCO

Inventor： Kyu-Seok Han ,  Jae-Soo Lim ,  Byung-Deug Hong ,  Chan-Hee Han

IPC: H01F1/01 ,  C22C38/00 ,  C22C38/04 ,  C22C38/02 ,  C30B29/52 ,  C22C38/06

CPC classification number: H01F1/01 ,  C21D8/12 ,  C21D8/1244 ,  C21D8/1272 ,  C21D2201/05 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C30B29/52

Abstract: Provided is a grain-oriented electric steel sheet having superior magnetic property and to a grain-oriented electric steel sheet including 2.0 to 4.5 weight % of Si, 0.001 to 0.10 weight % of C, 0.010 weight % or lower of Al, 0.08 weight % or lower of Mn, 0.005 weight % or lower of N, 0.002 to 0.050 weight % of S, the remainder being Fe and other unavoidable impurities. The steel sheet having been subjected to secondary recrystallization using at least any one of grain boundary-segregated elementary S and an FeS precipitate as a grain growth inhibitor.

Abstract translation: 本发明提供一种磁性优异的晶粒取向电工钢板和包含Si：2.0〜4.5重量％，C：0.001〜0.10重量％，Al：0.010重量％以下，0.08重量％以下的晶粒取向电工钢板， 或更低的Mn，0.005重量％以下的N，0.002〜0.050重量％的S，余量为Fe等不可避免的杂质。 使用晶界分离元素S和FeS析出物中的至少任一种进行二次再结晶的钢板作为晶粒生长抑制剂。

公开(公告)号：US12040110B2

公开(公告)日：2024-07-16

申请号：US17318407

申请日：2021-05-12

Applicant: POSCO CO., LTD

Inventor： Hyun-Seok Ko ,  Kyu-Seok Han ,  Hyung-Ki Park ,  Jin-Wook Seo ,  Jae-Soo Lim ,  Hyung Don Joo

IPC: C21D9/46 ,  C21D3/04 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  H01F1/147

CPC classification number: H01F1/14775 ,  C21D3/04 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D9/46 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04

Abstract: Disclosed are an oriented electrical steel sheet and a manufacturing method thereof. An exemplary embodiment of the present invention provides a method of manufacturing an oriented electrical steel sheet, including: providing a slab including Si at 1.0 to 4.0 wt %, C at 0.1 to 0.4 wt %, and the remaining portion including Fe and other inevitably incorporated impurities; reheating the slab; producing a hot rolled steel sheet by hot rolling the slab; performing annealing of the hot rolled steel sheet; cold rolling the annealed hot rolled steel sheet; decarburizing and primary annealing the cold rolled steel sheet; cold rolling the decarburized and annealed steel sheet; and secondary annealing the cold rolled steel sheet.

公开(公告)号：US20190323105A1

公开(公告)日：2019-10-24

申请号：US16472249

申请日：2017-12-21

Applicant: POSCO

Inventor： Chang Soo Park ,  Kyu-Seok Han ,  Hyung Don Joo ,  Jae Kyoum Kim ,  Woo-Sin Kim

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D1/74

Abstract: A grain-oriented electrical steel sheet of an embodiment of the present invention comprises Si: 1.0% to 7.0% and Y: 0.005% to 0.5% by wt %, and the remainder comprising Fe and other inevitable impurities, and 10 pieces or less of inclusions comprising Y and having a diameter of 30 nm to 5 μm per area of 1 mm2.

公开(公告)号：US20230029310A1

公开(公告)日：2023-01-26

申请号：US17786267

申请日：2020-12-15

Applicant: POSCO

Inventor： Chang-Soo Park ,  Kyu-Seok Han ,  Jin-Wook Seo ,  Yu-Jun Bak

IPC: C21D8/02 ,  C22C38/00 ,  C21D1/26 ,  C21D6/00 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

Abstract: An exemplary embodiment in the present disclosure provides a grain-oriented electrical steel sheet containing, by wt %: 3.0 to 4.5% of Si; 0.05 to 0.2% of Mn; 0.015 to 0.035% of Al; 0.0015% or less (excluding 0%) of C; 0.0015% or less (excluding 0%) of N; 0.0015% or less (excluding 0%) of S; and a balance of Fe and other unavoidable impurities, wherein the grain-oriented electrical steel sheet satisfies the following Relational Expressions 1 and 2: (W13/50/W17/50)≤0.57  [Relational Expression 1] (W15/50/W17/50)≤0.76  [Relational Expression 2] where Wx/y represents a core loss value under conditions in which a magnitude of an applied magnetic field is x/10 T and a frequency is y Hz.

公开(公告)号：US11031162B2

公开(公告)日：2021-06-08

申请号：US15529870

申请日：2014-12-08

Applicant: POSCO

Inventor： Hyun-Seok Ko ,  Kyu-Seok Han ,  Hyung-Ki Park ,  Jin-Wook Seo ,  Jae-Soo Lim ,  Hyung Don Joo

IPC: H01F1/147 ,  C22C38/02 ,  C22C38/00 ,  C22C38/04 ,  C21D9/46 ,  C21D8/12 ,  C21D3/04

Abstract: Disclosed are an oriented electrical steel sheet and a manufacturing method thereof. An exemplary embodiment of the present invention provides a method of manufacturing an oriented electrical steel sheet, including: providing a slab including Si at 1.0 to 4.0 wt %, C at 0.1 to 0.4 wt %, and the remaining portion including Fe and other inevitably incorporated impurities; reheating the slab; producing a hot rolled steel sheet by hot rolling the slab; performing annealing of the hot rolled steel sheet; cold rolling the annealed hot rolled steel sheet; decarburizing and annealing the cold rolled steel sheet; cold rolling the decarburized and annealed steel sheet; and final annealing the cold rolled steel sheet.

公开(公告)号：US10851431B2

公开(公告)日：2020-12-01

申请号：US15537749

申请日：2015-12-18

Applicant: POSCO

Inventor： Kyu-Seok Han ,  Hyung Don Joo ,  Jong-Tae Park ,  Jin-Wook Seo ,  Hyun-Seok Ko

IPC: C21D8/12 ,  C22C38/12 ,  C22C38/02 ,  C22C38/20 ,  C22C38/08 ,  C22C38/18 ,  C22C38/00 ,  C22C38/24 ,  C22C38/26 ,  C22C38/04 ,  H01F1/16 ,  C22C38/06 ,  C22C38/34 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C21D9/46 ,  C22C38/14 ,  H01F1/147 ,  C21D9/52

Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to an embodiment of the present invention includes: heating a slab, based on 100 wt % of a total composition thereof, including N at 0.0005 wt % to 0.015 wt %, Ti at 0.0001 wt % to 0.020 wt %, V at 0.0001 wt % to 0.020 wt %, Nb at 0.0001 wt % to 0.020 wt %, B at 0.0001 wt % to 0.020 wt %, and the remaining portion including Fe and other impurities, and then hot rolling it to prepare a hot-rolled steel sheet; annealing the hot-rolled steel sheet; after the hot-rolled steel sheet is annealed, cooling the hot-rolled steel sheet, and then cold rolling it to prepare a cold-rolled steel sheet; decarburization-annealing the cold-rolled steel sheet and then nitriding-annealing it, or simultaneously performing the decarburization-annealing and the nitriding-annealing; and final-annealing the decarburization-annealed and nitriding-annealed steel sheet.

公开(公告)号：US20190309387A1

公开(公告)日：2019-10-10

申请号：US16345488

申请日：2017-10-25

Applicant: POSCO

Inventor： Chang Soo Park ,  Kyu-Seok Han ,  Hyung Don Joo ,  Jin-Wook Seo ,  Woo-Sin Kim

IPC: C21D9/46 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00

Abstract: The grain-oriented electrical steel sheet according to one embodiment of the present invention includes, by weight, Si: 1.0 to 7.0%, B: 0.001 to 0.1%, and Ba and Y individually or in a total amount of 0.005 to 0.5%, and the remainder includes Fe and other unavoidable impurities.