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1.发明公开
公开(公告)号：EP3533902A1
公开(公告)日：2019-09-04
申请号：EP17885024.4
申请日：2017-12-06
IPC分类号： C23C22/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , C23C14/06 , C23C16/34 , H01F1/147 , C23C28/04
摘要： Provided are: a grain-oriented electrical steel sheet that has excellent coating adhesiveness and an excellent magnetic property after stress relief annealing; and a production method for therefor. The grain-oriented electrical steel sheet has: a steel sheet; a coating layer A which is a ceramic coating having an oxide content of less than 30 mass% and which is disposed on the steel sheet; and a coating layer B which is an insulating tensile coating containing an oxide and which is disposed on the coating layer A. When a Gaussian fitting is performed on a 31 P-NMR spectrum of the coating layer B within the range of 0 to -60 ppm, the proportion of a peak area of -17 to -33 ppm to the total peak area is 30% or more.
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公开(公告)号：EP3409796A1
公开(公告)日：2018-12-05
申请号：EP17744210.0
申请日：2017-01-24
发明人： OMURA Takeshi , TAKAJO Shigehiro , INOUE Hirotaka
CPC分类号： B23K15/00 , C21D8/1294 , H01F1/147
摘要： An excellent low noise property and excellent low iron loss property are obtained. A grain-oriented electrical steel sheet includes refined magnetic domains formed by electron beam irradiation. When the maximum magnetic flux density is 1.7 T, the grain-oriented electrical steel sheet has a residual magnetic flux density of 0.1 to 0.7 times the residual magnetic flux density before the electron beam irradiation and a maximum magnetizing force of 1.1 to 2.0 times the maximum magnetizing force before the electron beam irradiation.
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公开(公告)号：EP3332888B1
公开(公告)日：2020-03-04
申请号：EP16832759.1
申请日：2016-07-20
发明人： OKABE Seiji , IMAMURA Takeshi , TAKAJO Shigehiro
IPC分类号： B22D11/06
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4.发明公开
公开(公告)号：EP3546614A1
公开(公告)日：2019-10-02
申请号：EP17874944.6
申请日：2017-11-20
摘要： Provided are: a grain-oriented electromagnetic steel sheet which exhibits excellent magnetic characteristics and excellent coating film adhesion after strain relieving annealing; and a method for producing this grain-oriented electromagnetic steel sheet. This grain-oriented electromagnetic steel sheet comprises: a steel sheet; a coating film layer A that is a ceramic coating film which is formed on the steel sheet and has an oxide content of less than 30% by mass; and a coating film layer B that is an insulating tension coating film which is arranged on the coating film layer A and contains an oxide. The binding energy of the 1s orbital of oxygen in the coating film layer B is higher than 530 eV; and the tension applied to the steel sheet by the coating film layer B per a thickness of 1.0 µm of the coating film layer B is 4.0 MPa/µm or more.
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公开(公告)号：EP3591080A1
公开(公告)日：2020-01-08
申请号：EP18761106.6
申请日：2018-02-20
发明人： OMURA Takeshi , INOUE Hirotaka , TAKAJO Shigehiro
IPC分类号： C21D8/12 , C22C38/00 , H01F1/147 , C22C38/60 , C21D10/00 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , H01F1/16 , H01F1/18
摘要： Disclosed is a grain-oriented electrical steel sheet including: closure domains, each containing a discontinuous region at a part thereof and extending at an angle within 30° with respect to a transverse direction of the steel sheet, wherein a closure domain overlapping portion in the discontinuous region on one surface of the steel sheet has a length α in the transverse direction that is longer than a length β in the transverse direction of the closure domain overlapping portion on the other surface of the steel sheet, and the length α satisfies 0.5 ≤ α ≤ 5.0 and the length β satisfies 0.2α ≤ β ≤ 0.8α. Consequently, the iron loss and the deterioration of magnetostrictive properties are suppressed in discontinuous regions, which would be inevitably formed when magnetic domain refining treatment is performed using a plurality of irradiation devices.
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公开(公告)号：EP3098328B1
公开(公告)日：2019-08-14
申请号：EP15740472.4
申请日：2015-01-08
发明人： INOUE Hirotaka , TAKAJO Shigehiro , OKABE Seiji
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公开(公告)号：EP3098328A1
公开(公告)日：2016-11-30
申请号：EP15740472.4
申请日：2015-01-08
发明人： INOUE Hirotaka , TAKAJO Shigehiro , OKABE Seiji
CPC分类号： C21D8/1294 , B23K15/0006 , B23K26/0006 , B23K26/352 , B23K2101/18 , B23K2103/04 , B23K2103/50 , C22C38/00 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/60 , H01F1/16
摘要： A magnetic domain refining treatment is performed by dividing a surface of a steel sheet into a plurality of regions in a widthwise direction, disposing a laser irradiation apparatus or an electron beam irradiation apparatus in each of the regions, and forming beam-irradiated regions through beam irradiation, wherein beams are irradiated so that a nature of a juncture between beam-irradiated regions satisfies 0 ≤ α ≤ 0.3×a and -1.2×a + 0.02xw - 0.5×α - 6.5 ≤ β ≤ -0.13xa - 200×(1/w) + 5.4 when TD spacing β at the juncture between the beam-irradiated regions is set to a range of -3 to 0 mm, whereby a grain oriented electrical steel sheet having an excellent iron loss property is produced in a good productivity. Here, α, is RD spacing (mm) at a juncture between beam-irradiated regions, β is TD spacing (mm) at a juncture between beam-irradiated regions, a is beam spacing (mm), and w is average width of magnetic domain discontinuous part (µm).
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8.发明公开
公开(公告)号：EP3514262A1
公开(公告)日：2019-07-24
申请号：EP17862005.0
申请日：2017-10-17
IPC分类号： C23C28/04 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/04 , C22C38/34 , H01F1/147 , B05D1/28 , C23C14/06 , C23C14/08 , C23C14/32
摘要： Provided are: a grain-oriented electromagnetic steel sheet exhibiting excellent coating film adhesion and excellent magnetic characteristics; and a method for producing this grain-oriented electromagnetic steel sheet. This grain-oriented electromagnetic steel sheet is provided with a steel sheet, a ceramic coating film arranged on the steel sheet, and an oxide insulating tension coating film arranged on the ceramic coating film. The ceramic coating film contains a nitride and an oxide; the nitride contains at least one element selected from the group consisting of Cr, Ti, Zr, Mo, Nb, Si, Al, Ta, Hf, W and Y; and the oxide has a corundum crystal structure. The Young's modulus of the ceramic coating film as determined by a nanoindentation method is 230 GPa or more; the average film thickness of the ceramic coating film is from 0.01 µm to 0.30 µm (inclusive); and the tension of the oxide insulating tension coating film is 10 MPa or more.
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9.发明公开
公开(公告)号：EP3514261A1
公开(公告)日：2019-07-24
申请号：EP17861461.6
申请日：2017-10-17
IPC分类号： C23C28/04 , B32B15/04 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , H01F1/147 , C23C14/06 , C23C16/32 , C23C16/34 , C23C16/36 , C23C16/30 , C23C14/22 , C22C38/02 , C22C38/04
摘要： Provided are: an oriented electromagnetic steel sheet with outstanding coating adhesion and magnetic properties after stress relief annealing; and a method for manufacturing the oriented electromagnetic steel sheet. The oriented electromagnetic steel sheet comprises: a steel sheet; a non-oxide ceramic coating disposed on the steel sheet and containing a non-oxide; and an insulating tensile coating disposed on the non-oxide ceramic coating and containing an oxide. The thickness of the non-oxide ceramic coating is 0.020-0.400 µm. The thickness of the insulating tensile coating is at least 1.0 µm. The chromium content on the steel plate side of the non-oxide ceramic coating is less than 25 atomic %, and the chromium content on the insulating tensile coating side of the non-oxide ceramic coating is at least 25 atomic %.
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公开(公告)号：EP3332888A1
公开(公告)日：2018-06-13
申请号：EP16832759.1
申请日：2016-07-20
发明人： OKABE Seiji , IMAMURA Takeshi , TAKAJO Shigehiro
IPC分类号： B22D11/06
摘要： A single roll type apparatus for manufacturing a metal thin strip by injecting a molten metal onto an outer peripheral face of a cooling roll rotating at a high speed and rapidly solidifying it to manufacture a metal thin strip, wherein an airflow blocking device for blocking the airflow along the surface of the cooling roll is provided at an upstream side of a molten metal injection nozzle for injecting the molten metal in a rotation direction of the cooling roll, and a carbon dioxide gas injection nozzle for forming a flow of carbon dioxide gas on an outer peripheral surface of the cooling roll between the airflow blocking device and the molten metal injection nozzle or forming a carbon dioxide atmosphere on the surface of the cooling roll between the airflow blocking device and the molten metal injection nozzle is disposed, and a foreign material removal device for removing foreign material attached to the surface of the cooling roll is disposed at an upstream side of the airflow blocking device in the rotation direction of the cooling roll, whereby a metal thin strip having a good surface quality can be manufactured stably even in the continuous operation for a long time.
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