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公开(公告)号：US20240209482A1
公开(公告)日：2024-06-27
申请号：US18286681
申请日：2022-04-13
发明人： Kazutoshi TAKEDA , Shinsuke TAKATANI , Ryu HIRAYAMA , Minako FUKUCHI , Yoshiaki IWASE , Makoto NIWA , Makoto HIRAKAWA
CPC分类号： C22C38/02 , C22C38/04 , C22C38/06 , H01F1/14791 , H01F1/18 , H02K15/024 , H02K1/02
摘要： This electrical steel sheet contains: as a chemical composition, in a unit of mass %, 2.5% to 3.9% of Si; 0.001% to 3.0% of Al; and 0.05% to 5.0% of Mn, the remainder being Fe and impurities, and, on one surface or both surfaces thereof, an insulating coating containing a curing accelerator is formed.
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2.发明公开公开(公告)号：US20240190119A1
公开(公告)日：2024-06-13
申请号：US18286501
申请日：2022-04-13
发明人： Kazutoshi TAKEDA , Shinsuke TAKATANI , Ryu HIRAYAMA , Minako FUKUCHI , Yoshiaki IWASE , Makoto NIWA , Makoto HIRAKAWA
IPC分类号： B32B37/12 , B30B9/28 , B32B7/12 , B32B15/04 , B32B15/18 , B32B37/10 , C09J5/02 , C22C38/02 , C22C38/04 , C22C38/06 , H02K1/02 , H02K15/02
CPC分类号： B32B37/12 , B30B9/28 , B32B7/12 , B32B15/043 , B32B15/18 , B32B37/10 , C09J5/02 , C22C38/02 , C22C38/04 , C22C38/06 , H02K1/02 , H02K15/02 , B32B2309/12 , B32B2311/30 , C22C2202/02
摘要： This bonded and stacked core manufacturing method is for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerator having an average viscosity of 0.01 Pa·s to 100 Pa·s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.
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3.发明公开公开(公告)号：US20230253140A1
公开(公告)日：2023-08-10
申请号：US18014352
申请日：2021-07-06
发明人： Kazutoshi TAKEDA , Shinsuke TAKATANI , Ryu HIRAYAMA , Yoshiaki IWASE , Makoto NIWA , Masashi YAMADA
IPC分类号： H01F27/26 , C09J133/20 , C09J11/04 , C09J11/06
CPC分类号： H01F27/263 , C09J133/20 , C09J11/04 , C09J11/06 , C09J2400/163
摘要： This adhesively-laminated core manufacturing method is a method for manufacturing an adhesively-laminated core by punching a plurality of steel sheet parts while a strip-shaped steel sheet is fed and laminating the steel sheet parts via an adhesive, and includes a step of forming a curing acceleration portion by applying and drying a curing accelerator on one or both surfaces of the strip-shaped steel sheet before a pressing oil is applied, and a step of applying the pressing oil to a surface of the curing acceleration portion.
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公开(公告)号：US20220106661A1
公开(公告)日：2022-04-07
申请号：US17421857
申请日：2020-01-16
IPC分类号： C21D9/46 , C21D8/12 , C23C22/00 , C23G1/00 , C22C38/02 , C22C38/04 , C22C38/00 , C22C38/60 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor, a smoothing process where chemical-polished is conducted to control average roughness Ra, and an insulation coating forming process where insulation coating forming solution in which crystalline phosphide is included is applied.
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公开(公告)号：US20220098689A1
公开(公告)日：2022-03-31
申请号：US17421802
申请日：2020-01-16
IPC分类号： C21D9/46 , C23G1/08 , C21D8/02 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/60
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor, a smoothing process where chemical-polished is conducted to control average roughness Ra, and an insulation coating forming process where insulation coating forming solution in which crystalline phosphide is included is applied.
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公开(公告)号：US20220090246A1
公开(公告)日：2022-03-24
申请号：US17422605
申请日：2020-01-16
IPC分类号： C22C38/54 , C22C38/42 , C22C38/48 , C22C38/46 , C22C38/50 , C22C38/44 , C22C38/00 , C22C38/02 , C22C38/06 , C21D8/02 , C21D9/46 , C21D3/04 , C21D8/12
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and MCl in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas without hydrogen, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.
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公开(公告)号：US20220090240A1
公开(公告)日：2022-03-24
申请号：US17421774
申请日：2020-01-16
摘要： A method of manufacturing a grain-oriented electrical steel sheet according to the present invention includes a process of executing hot rolling on a slab to obtain a hot-rolled sheet; a process of executing hot-rolled sheet annealing on the hot-rolled sheet to obtain an annealed hot-rolled sheet; a process of executing cold rolling on the annealed hot-rolled sheet to obtain a cold-rolled sheet; a process of executing decarburization annealing on the cold-rolled sheet to obtain a decarburization annealed sheet; a process of applying an annealing separator containing alumina as a main component to the decarburization annealed sheet; and a process of executing final annealing on the decarburization annealed sheet to which the annealing separator is applied, wherein the annealing separator contains 28% to 50% by mass of MgO, and wherein an application amount of the annealing separator is 6.0 to 14.0 g/m2 per one surface of the decarburization annealed sheet.
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公开(公告)号：US20220090225A1
公开(公告)日：2022-03-24
申请号：US17421758
申请日：2020-01-16
IPC分类号： C21D9/46 , C21D8/12 , C21D8/00 , C22C38/02 , H01F41/02 , C22C38/04 , C22C38/00 , C22C38/06 , H01F1/18 , C21D3/04 , C21D6/00
摘要： This grain-oriented electrical steel sheet includes a base steel sheet, an intermediate layer that is formed on a surface of the base steel sheet and mainly contains silicon oxide, and an insulation coating that is formed on the surface of the intermediate layer. A number density of the oxide particles in a region from the surface of the base steel sheet to a depth of 10 μm toward an inside of the base steel sheet is 0.020 oxide particles/μm2 or less. In the grain-oriented electrical steel sheet, an area rate of an intermediate layer-remaining region n which the intermediate layer does not peel off but remains in a region in which the insulation coating peels off after a bend test performed using a mandrel according to JIS K 5600-5-1 (1999) is 20% or more.
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公开(公告)号：US20240183012A1
公开(公告)日：2024-06-06
申请号：US18285451
申请日：2022-04-06
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1272 , C21D8/1283 , C21D8/1288 , C22C38/001 , C22C38/004 , C22C38/04 , C22C38/06 , C21D2201/05
摘要： This grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the insulating coating includes an intermediate layer formed on a base steel sheet side and containing a crystalline metal phosphate, and a tension coating layer formed on a surface side of the insulating coating, an average thickness of the intermediate layer is 0.3 to 10.0 μm, an average thickness of the insulating coating is 2.0 to 10.0 μm, the crystalline metal phosphate of the intermediate layer is one or two or more of zinc phosphate, manganese phosphate, iron phosphate, and zinc calcium phosphate, the tension coating layer contains a metal phosphate and silica, and an amount of the silica in the tension coating layer is 20 to 60 mass %.
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10.发明公开公开(公告)号：US20230257622A1
公开(公告)日：2023-08-17
申请号：US18010555
申请日：2021-06-17
CPC分类号： C09D163/00 , C09D5/00 , H01F1/18 , H02K1/02 , H02K1/06 , B32B15/18 , B32B15/043 , B32B7/12 , B32B2255/06 , B32B2255/26 , B32B2603/00
摘要： An electrical steel sheet used for a laminated core is an electrical steel sheet including an insulation coating 3 on a surface of a base steel sheet 2, the insulation coating being coated with a coating composition for an electrical steel sheet. The coating composition for an electrical steel sheet contains an epoxy resin, a first curing agent including an alkylphenol, and a second curing agent including either one or both of a phenol resol resin and a phenol novolac resin formulated in specific proportions.
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