公开(公告)号：US20250043407A1

公开(公告)日：2025-02-06

申请号：US18710776

申请日：2022-10-17

Applicant: ArcelorMittal

Inventor： Astrid PERLADE ,  Kangying ZHU ,  Jean-Michel MATAIGNE ,  Jonas STAUDTE

IPC: C23C2/02 ,  B32B15/01 ,  C21D3/04 ,  C21D9/46 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C23C2/06

Abstract: A steel sheet containing manganese from 3.0 to 6.0% in weight which has both a good coatability by liquid zinc and a good LME resistance. The present invention also aims to make available an easy to implement method to obtain the steel sheet and an assembly which does not have LME issues after spot-welding.

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：US11948711B2

公开(公告)日：2024-04-02

申请号：US17761092

申请日：2020-09-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Takashi Kataoka ,  Ichiro Tanaka ,  Haruhiko Atsumi ,  Kazutoshi Takeda ,  Ryutaro Yamagata ,  Nobusato Morishige

IPC: C22C38/00 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/28 ,  C22C38/34 ,  H01F1/147

CPC classification number: H01F1/14783 ,  C21D3/04 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1233 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/28 ,  C22C38/34

Abstract: A grain oriented electrical steel sheet includes a base steel sheet, a glass film, and a tension-insulation coating. When a glow discharge emission spectroscopy is conducted from a surface of the glass film toward a depth direction, an analysis starting time Ts, a time TAlp at which Al shows a maximum emission intensity, an Al emission intensity F(TAlp) at the TAlp, a time TSip at which Si shows a maximum emission intensity, and an Al emission intensity F(TSip) at the TSip satisfy 0.05≤F(TSip)/F(TAlp)≤0.50 and 2.0≤(TAlp−Ts)/(TSip−Ts)≤5.0.

公开(公告)号：US11946114B2

公开(公告)日：2024-04-02

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 ,  C21D1/68 ,  C21D3/04 ,  C21D6/00 ,  C21D8/02 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60

CPC classification number: C21D9/46 ,  C04B35/465 ,  C21D1/68 ,  C21D3/04 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C04B2235/3206 ,  C04B2235/3232 ,  C04B2235/3236 ,  C04B2235/448 ,  C21D2201/05 ,  C21D2211/001

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：US11634787B2

公开(公告)日：2023-04-25

申请号：US17421215

申请日：2020-01-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Ryutaro Yamagata ,  Nobusato Morishige ,  Ichiro Tanaka

IPC: C21D9/46 ,  C22C38/60 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D3/04 ,  H01F1/147

Abstract: Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to a base steel sheet, an annealing separator utilized for manufacture of grain-oriented electrical steel sheet, and a method for manufacturing grain-oriented electrical steel sheet are proposed. The grain-oriented electrical steel sheet is provided with a base metal steel sheet containing comprising a predetermined chemical composition and a primary coating formed on a surface of the base steel sheet and comprising Mg2SiO4 as a main constituent. The primary coating satisfies the conditions of (1) the number density D3 of the Al concentrated region: 0.020 to 0.180/μm2, (2) (total area S5 of regions which is anchoring oxide layer regions and is also Al concentrated regions)/(total area S3 of Al concentrated regions)≥33%, (3) distance H5 of mean value of length in thickness direction of regions which is anchoring oxide layer regions and is also Al concentrated regions minus H0: 0.4 to 4.0 μm, (4) (total area S1 of anchoring oxide layer regions)/(observed area S0)≥15%.

公开(公告)号：US11591668B2

公开(公告)日：2023-02-28

申请号：US17421562

申请日：2020-01-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro Tanaka ,  Ryutaro Yamagata ,  Nobusato Morishige ,  Takashi Kataoka ,  Masaru Takahashi

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/12 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C22C38/00 ,  H01F1/147

Abstract: Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to the steel sheet is provided. The grain-oriented electrical steel sheet is provided with a base steel sheet having a chemical composition containing C: 0.005% or less, Si: 2.5 to 4.5%, Mn: 0.050 to 1.000%, a total of S and Se: 0.005% or less, sol. Al: 0.005% or less, and N: 0.005% or less and having a balance of Fe and impurities and a primary coating having Mg2 SiO4 as a main constituent formed on a surface of the base steel sheet. A peak position of Al emission intensity obtained when conducting elemental analysis by glow discharge spectrometry from a surface of the primary coating in a thickness direction is present in a range of 2.0 to 12.0 μm from a surface of the primary coating to the thickness direction. A sum of perimeters of the Al oxides at the peak position of Al emission intensity is 0.20 to 1.00 μm/μm2, and a number density of Al oxides is 0.02 to 0.20/μm2.

公开(公告)号：US11505843B2

公开(公告)日：2022-11-22

申请号：US16063483

申请日：2016-12-15

Applicant: POSCO

Inventor： Chang Soo Park ,  Jong Ho Park ,  Byung Deug Hong ,  Yun Su Kim

IPC: C21D8/12 ,  C22C38/02 ,  C21D1/72 ,  C21D9/46 ,  C21D1/68 ,  C21D1/06 ,  C21D3/04 ,  C21D6/00 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C23C8/26 ,  C23C8/80

Abstract: An annealing separator for an oriented electrical steel sheet includes: a first component including a Mg oxide or a Mg hydroxide; and a second component including one kind among oxides and hydroxides of a metal selected from Al, Ti, Cu, Cr, Ni, Ca, Zn, Na, K, Mo, In, Sb, Ba, Bi, and Mn, or two or more kinds thereof.

公开(公告)号：US20220098688A1

公开(公告)日：2022-03-31

申请号：US17421562

申请日：2020-01-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Ichiro TANAKA ,  Ryutaro YAMAGATA ,  Nobusato MORISHIGE ,  Takashi KATAOKA ,  Masaru TAKAHASHI

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D3/04 ,  H01F1/147

Abstract: Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to the steel sheet is provided. The grain-oriented electrical steel sheet is provided with a base steel sheet having a chemical composition containing C: 0.005% or less, Si: 2.5 to 4.5%, Mn: 0.050 to 1.000%, a total of S and Se: 0.005% or less, sol. Al: 0.005% or less, and N: 0.005% or less and having a balance of Fe and impurities and a primary coating having Mg2 SiO4 as a main constituent formed on a surface of the base steel sheet. A peak position of Al emission intensity obtained when conducting elemental analysis by glow discharge spectrometry from a surface of the primary coating in a thickness direction is present in a range of 2.0 to 12.0 μm from a surface of the primary coating to the thickness direction. A sum of perimeters of the Al oxides at the peak position of Al emission intensity is 0.20 to 1.00 μm/μm2, and a number density of Al oxides is 0.02 to 0.20/μm2.

公开(公告)号：US20220068526A1

公开(公告)日：2022-03-03

申请号：US17423013

申请日：2020-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiyuki USHIGAMI ,  Masato MIZOKAMI ,  Shingo OKADA ,  Yoichi ZAIZEN ,  Shinji YAMAMOTO

IPC: H01F1/147 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D3/04

Abstract: A grain-oriented electrical steel sheet according to the present invention includes a silicon steel sheet as a base steel sheet, and when an average value of amplitudes in a wavelength range of 20 to 100 μm among wavelength components obtained by performing Fourier analysis on a measured cross-sectional curve parallel to a sheet width direction of the silicon steel sheet is set as ave-AMPC100, ave-AMPC100 is 0.0001 to 0.050 μm.

公开(公告)号：US11174525B2

公开(公告)日：2021-11-16

申请号：US16471868

申请日：2017-12-20

Applicant: POSCO

Inventor： Min Soo Han ,  Jong-Tae Park ,  Yun Su Kim ,  Chang Soo Park

IPC: C21D3/04 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  H01F1/18

Abstract: The present invention has been made in an effort to provide an annealing separator component for an oriented electrical steel sheet, an oriented electrical steel sheet, and a manufacturing method thereof. According to an exemplary embodiment of the present invention, an annealing separator composition for an oriented electrical steel sheet, includes: 100 weight parts of at least one of magnesium oxide and magnesium hydroxide; and 5 to 200 weight parts of aluminum hydroxide.