公开(公告)号：US11335475B2

公开(公告)日：2022-05-17

申请号：US16065318

申请日：2016-12-22

Applicant: POSCO

Inventor： Min Serk Kwon ,  Hyun Seok Ko

IPC: H01B3/12 ,  C21D8/12 ,  C09D7/61 ,  C09D7/40 ,  B82Y30/00 ,  B82Y40/00

Abstract: An insulation film composition for a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 10-50 parts by weight of metal silicate or organic silicate, 20-70 parts by weight of inorganic nanoparticles and 0.1-20 parts by weight of cobalt hydroxide. The insulation film composition can further include 10-50 parts by weight of metal phosphate, and/or 5-30 parts by weight of inorganic nanoparticles having a particle diameter of 1 nm to less than 10 nm, and/or inorganic nanoparticles having a particle diameter of 10 to 100 nm and/or 0.1-20 parts by weight of chromium oxide.

公开(公告)号：US20220119910A1

公开(公告)日：2022-04-21

申请号：US17550366

申请日：2021-12-14

Applicant: POSCO

Inventor： Min Serk Kwon ,  Tae Young No ,  Chang Soo Park ,  Heon-Jo Choi

IPC: C21D9/46 ,  C04B35/465 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C21D1/68

Abstract: Provided is an annealing separating agent composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. The annealing separating agent composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention contains 30 to 70% by weight of a calcium compound, and the remainder of magnesium oxide or magnesium hydroxide on a solid basis.

公开(公告)号：US11848122B2

公开(公告)日：2023-12-19

申请号：US17721936

申请日：2022-04-15

Applicant: POSCO

Inventor： Min Serk Kwon ,  Hyun Seok Ko

IPC: H01B3/12 ,  C09D7/61 ,  C09D7/40 ,  C21D8/12 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: H01B3/12 ,  C09D7/61 ,  C09D7/67 ,  C09D7/68 ,  C21D8/1283 ,  B82Y30/00 ,  B82Y40/00

Abstract: An insulation film composition for a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 10-50 parts by weight of metal silicate or organic silicate, 20-70 parts by weight of inorganic nanoparticles and 0.1-20 parts by weight of cobalt hydroxide. The insulation film composition can further include 10-50 parts by weight of metal phosphate, and/or 5-30 parts by weight of inorganic nanoparticles having a particle diameter of 1 nm to less than 10 nm, and/or inorganic nanoparticles having a particle diameter of 10 to 100 nm and/or 0.1-20 parts by weight of chromium oxide.

公开(公告)号：US20190276911A1

公开(公告)日：2019-09-12

申请号：US16345521

申请日：2017-10-25

Applicant: POSCO

Inventor： Min Serk Kwon ,  Tae Young No ,  Chang Soo Park ,  Heon-Jo Choi

IPC: C21D9/46 ,  C21D8/02 ,  C21D8/12 ,  C21D3/04 ,  C21D6/00 ,  C22C38/60 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C04B35/465

Abstract: Provided is an annealing separating agent composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. The annealing separating agent composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention contains 30 to 70% by weight of a calcium compound, and the remainder of magnesium oxide or magnesium hydroxide on a solid basis.

公开(公告)号：US10023932B2

公开(公告)日：2018-07-17

申请号：US14758212

申请日：2013-12-26

Applicant: POSCO

Inventor： Min Soo Han ,  Min Serk Kwon ,  Soon-Bok Park ,  Chan-Hee Han

IPC: H01F1/04 ,  C21D9/46 ,  C21D8/12 ,  C21D9/56 ,  C23C8/02 ,  C23C8/26 ,  C23C8/80 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C23F11/02

Abstract: An oriented electrical steel sheet and a method of manufacturing the same are provided, and in a method of manufacturing an oriented electrical steel sheet including processes of producing a hot rolled plate by hot rolling a steel slab, performing or omitting hot rolled plate annealing, performing cold rolling, performing decarburization and nitride annealing, and performing final high temperature annealing, the decarburization and nitride annealing process is performed in a dew point range of 35-55° C., and in the final annealing process, a glassless additive including MgO is applied.

公开(公告)号：US20230407432A1

公开(公告)日：2023-12-21

申请号：US18233553

申请日：2023-08-14

Applicant: POSCO CO., LTD

Inventor： Min Serk Kwon ,  Chang Soo Park ,  Heon-Jo Choi ,  Se-Min Park

IPC: C21D9/46 ,  C04B35/185 ,  C04B35/622 ,  C04B35/64 ,  C21D1/68 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08

CPC classification number: C21D9/46 ,  C04B35/185 ,  C04B35/62222 ,  C04B35/64 ,  C21D1/68 ,  C21D6/001 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1272 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C04B2235/3206 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/3293 ,  C04B2235/3294 ,  C04B2235/3409 ,  C04B2235/3463 ,  C04B2235/3826 ,  C04B2235/386 ,  C04B2235/447 ,  C04B2235/787 ,  C22C2202/02

Abstract: The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet.
An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of present invention comprising: on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; and the remainder being magnesium oxide or magnesium hydroxide.

公开(公告)号：US20190323104A1

公开(公告)日：2019-10-24

申请号：US16472247

申请日：2017-12-21

Applicant: POSCO

Inventor： Min Serk Kwon ,  Chang Soo Park ,  Heon-Jo Choi ,  Se-Min Park

IPC: C21D9/46 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D1/68 ,  C04B35/185 ,  C04B35/622 ,  C04B35/64

Abstract: The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet.An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of present invention comprising: on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; and the remainder being magnesium oxide or magnesium hydroxide.

公开(公告)号：US11773462B2

公开(公告)日：2023-10-03

申请号：US16472247

申请日：2017-12-21

Applicant: POSCO

Inventor： Min Serk Kwon ,  Chang Soo Park ,  Heon-Jo Choi ,  Se-Min Park

IPC: C04B35/04 ,  C04B35/185 ,  C21D9/46 ,  C04B35/622 ,  C04B35/64 ,  C21D1/68 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08

CPC classification number: C21D9/46 ,  C04B35/185 ,  C04B35/62222 ,  C04B35/64 ,  C21D1/68 ,  C21D6/001 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1272 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C04B2235/3206 ,  C04B2235/3232 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/3293 ,  C04B2235/3294 ,  C04B2235/3409 ,  C04B2235/3463 ,  C04B2235/386 ,  C04B2235/3826 ,  C04B2235/447 ,  C04B2235/787 ,  C22C2202/02

Abstract: The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet.
An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of present invention comprising: on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; and the remainder being magnesium oxide or magnesium hydroxide.

公开(公告)号：US20230047863A1

公开(公告)日：2023-02-16

申请号：US17784514

申请日：2020-12-17

Applicant: POSCO

Inventor： Min Serk Kwon ,  Changsoo Park ,  Heon-Jo Choi ,  Taeyoung No

IPC: C21D8/12 ,  C21D9/46

Abstract: An annealing separator composition for a grain-oriented electrical steel sheet according to an exemplary embodiment of the present invention contains a composite metal oxide containing Mg and a metal M, wherein the metal M is one or more of Be, Ca, Ba, Sr, Sn, Mn, Fe, Co, Ni, Cu, and Zn.

公开(公告)号：US11225700B2

公开(公告)日：2022-01-18

申请号：US16345521

申请日：2017-10-25

Applicant: POSCO

Inventor： Min Serk Kwon ,  Tae Young No ,  Chang Soo Park ,  Heon-Jo Choi

IPC: C21D9/46 ,  C21D8/02 ,  C21D8/12 ,  C21D3/04 ,  C21D6/00 ,  C22C38/60 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C04B35/465 ,  C21D1/68

Abstract: Provided is an annealing separating agent composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. The annealing separating agent composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention contains 30 to 70% by weight of a calcium compound, and the remainder of magnesium oxide or magnesium hydroxide on a solid basis.