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公开(公告)号：US20240186042A1
公开(公告)日：2024-06-06
申请号：US18285440
申请日：2022-05-27
IPC分类号： H01F1/18 , C21D1/74 , C21D6/00 , C21D8/02 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/60 , C23C22/82 , C23C28/04
CPC分类号： H01F1/18 , C21D1/74 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0284 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/60 , C23C22/82 , C23C28/04
摘要： Provided is a grain oriented electrical steel sheet including a base metal steel sheet, an intermediate layer and an insulation coating, wherein: the intermediate layer is an oxide film; an average thickness of the oxide film is 2-500 nm; the insulation coating is a phosphate coating; an average thickness of the insulation coating is 0.1-10 μm. When grazing incidence X-ray diffraction is performed on the phosphate coating using a Co-Kα excitation source, the X-ray diffraction pattern has a diffraction peak originating from cristobalite-type aluminum phosphate at a diffraction angle of 2θ=24.8°; a half value width FWHM0.5 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=0.5° and a half value width FWHM1.0 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=1.0° satisfy 0.20°≤FWHM0.5≤2.00°, 0.20°≤FWHM1.0≤2.00°, and 0°≤|F.WHM0.5−FWHM1.0|≤1.00°.
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公开(公告)号：US20240295029A1
公开(公告)日：2024-09-05
申请号：US18280872
申请日：2022-03-11
发明人： Masaru TAKAHASHI , Shuichi YAMAZAKI
CPC分类号： C23C24/103 , C25F3/14 , H01F1/14791
摘要： This grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet having a final annealing film mainly composed of forsterite and an insulation coating containing pseudo-tetragonal aluminum borate and silica on its surface, wherein one surface or both surfaces of the steel sheet have linear grooves or dot-row shaped recesses with a depth of 5 to 40 μm.
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公开(公告)号：US20240254602A1
公开(公告)日：2024-08-01
申请号：US18564043
申请日：2022-05-30
CPC分类号： C22C38/02 , C21D8/1283 , C21D2201/03 , C21D2201/05
摘要： A grain-oriented electrical steel sheet includes a base steel sheet, an oxide film, and a phosphate-based coating. The phosphate-based coating includes a first crystalline phosphorus oxide whose crystal structure corresponds to Fe2P2O7 and a second crystalline phosphorous oxide whose crystal structure corresponds to Fe7(P2O7)4, and the second crystalline phosphorous oxide includes at least one element selected from a group consisting of V, W, Zr, Co, and Mo.
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4.发明公开公开(公告)号：US20230160034A1
公开(公告)日：2023-05-25
申请号：US18096276
申请日：2023-01-12
IPC分类号： C21D9/46 , C21D3/04 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/147
CPC分类号： C21D9/46 , C21D3/04 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1233 , C21D8/1255 , C21D8/1272 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/008 , C22C38/16 , H01F1/147 , C22C2202/02
摘要： 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.
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公开(公告)号：US20220106658A1
公开(公告)日：2022-04-07
申请号：US17421850
申请日：2020-01-16
发明人： Yoshiyuki USHIGAMI , Shinji YAMAMOTO , Fumiaki TAKAHASHI , Hideyuki HAMAMURA , Shinsuke TAKATANI , Masaru TAKAHASHI
摘要： The grain-oriented electrical steel sheet according to the present invention is a grain-oriented electrical steel sheet having a base steel sheet (1), an intermediate layer (4) disposed to be in contact with the base steel sheet (1), and an insulation coating (3) disposed to be in contact with the intermediate layer (4), and the grain-oriented electrical steel sheet includes a surface of the base steel sheet (1) having a groove (G) which extends in a direction intersecting a rolling direction of the base steel sheet (1), in which in a cross-sectional view of a plane parallel to the rolling direction and a sheet thickness direction of the base steel sheet (1), when a region between end portions of the groove (G) is defined as a groove part (RG), an average thickness of the intermediate layer (4) of the groove part (RG) is 0.5 times or more and 3.0 times or less an average thickness of the intermediate layer (4) other than the groove part (RG), and an area ratio of voids in the insulation coating (3) of the groove part (RG) is 15% or less.
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公开(公告)号：US20220098691A1
公开(公告)日：2022-03-31
申请号：US17421824
申请日：2020-01-16
IPC分类号： C21D9/46 , C21D8/12 , C21D6/00 , C21D3/04 , C22C38/34 , C22C38/16 , C22C38/60 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , H01F1/147
摘要： A method for manufacturing a grain-oriented electrical steel sheet includes: heating a steel slab having a prescribed chemical composition to lower than 1250° C. and subjecting the steel slab to hot rolling to obtain a hot-rolled steel sheet; performing hot-band annealing on the hot-rolled steel sheet; pickling the hot-rolled steel sheet which has been subjected to the hot-band annealing; subjecting the hot-rolled steel sheet which has been subjected to the pickling to cold rolling to obtain a cold-rolled steel sheet having a final sheet thickness d of 0.15 to 0.23 mm; performing a decarburization nitriding treatment including decarburization annealing and nitriding on the cold-rolled steel sheet; performing final annealing on the cold-rolled steel sheet which has been subjected to the decarburization nitriding treatment; and then applying a coating liquid for insulation coating formation to the cold-rolled steel sheet which has been subjected to the final annealing and baking the cold-rolled steel sheet. Sol. Al/N which is a mass ratio between Sol. Al and N in the steel slab and the final sheet thickness d satisfy a prescribed relational expression, the N content of the cold-rolled steel sheet which has been subjected to the decarburization nitriding treatment is 40 to 1000 ppm, and a decarburization annealing temperature in the decarburization annealing is lower than 1000° C.
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公开(公告)号：US20230290569A1
公开(公告)日：2023-09-14
申请号：US18032887
申请日：2021-10-26
IPC分类号： H01F41/02 , H01F27/245
CPC分类号： H01F41/024 , H01F27/2455
摘要： A wound core (10) is a wound core having a wound shape (10) including a rectangular hollow portion (15) in a center and a portion in which grain-oriented electrical steel sheets (1) in which planar portions (4) and bent portions (5) are alternately continuous in a longitudinal direction are stacked in a sheet thickness direction, which is a wound core formed by stacking the grain-oriented electrical steel sheets(1) that have been individually bent in layers and assembled into a wound shape and in which the plurality of grain-oriented electrical steel sheets are connected to each other via at least one joining part (6) for each roll, wherein the bent portion (5) of the laminated grain-oriented electrical steel sheet (1) has an average Vickers hardness of 190 to 250 HV in an L cross section in the longitudinal direction which is a cross section of the grain-oriented electrical steel sheet (1) in a thickness direction.
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公开(公告)号：US20220154304A1
公开(公告)日：2022-05-19
申请号：US17437703
申请日：2019-03-20
IPC分类号： C21D9/46 , C22C38/16 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C23G1/08 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
摘要： A non oriented electrical steel sheet consists of a silicon steel sheet and an insulation coating. The silicon steel sheet includes an internally oxidized layer containing SiO2 in a surface thereof, an average thickness of the internally oxidized layer is 0.10 to 5.0 μm, and a vickers hardness in the internally oxidized layer is 1.15 to 1.5 times as compared with a vickers hardness in a thickness central area.
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9.发明申请公开(公告)号：US20220098688A1
公开(公告)日：2022-03-31
申请号：US17421562
申请日：2020-01-08
IPC分类号： C21D9/46 , C22C38/16 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , C21D3/04 , H01F1/147
摘要： 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.
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公开(公告)号：US20220081744A1
公开(公告)日：2022-03-17
申请号：US17422219
申请日：2020-01-16
摘要： Provided is a grain-oriented electrical steel sheet including a base steel sheet, an intermediate layer which is disposed in contact with the base steel sheet and mainly includes silicon oxide, and an insulation coating which is disposed in contact with the intermediate layer and mainly includes phosphate and colloidal silica, in which the base steel sheet contains predetermined chemical composition, BN having an average particle size of 50 to 300 nm is present, when an emission intensity of B is measured using glow discharge emission analysis, predetermined conditions are satisfied, and a ratio of a major axis to a minor axis of BN is 1.5 or less.
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