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公开(公告)号：EP3760746A1
公开(公告)日：2021-01-06
申请号：EP19758237.2
申请日：2019-02-26
摘要： A grain-oriented electrical steel sheet according to the present embodiment is a grain-oriented electrical steel sheet having a groove formed on a surface, in which, in a cross section of the grain-oriented electrical steel sheet orthogonal to the groove, a KAM value is 0.1 or more and 3.0 or less in a region on a central side in a thickness direction of the grain-oriented electrical steel sheet with respect to the groove, the region being surrounded by a square having one side in contact with a groove bottom of the groove and having a length of 50 µm in each side.
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公开(公告)号：EP3913080A1
公开(公告)日：2021-11-24
申请号：EP20741132.3
申请日：2020-01-16
摘要： The grain-oriented electrical steel sheet according to the present embodiment 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). The grain-oriented electrical steel sheet according to the present embodiment includes a surface of the base steel sheet (1) having a strain region (D) which extends in a direction intersecting a rolling direction of the base steel sheet (1), and a crystalline phosphorus oxide M 2 P 4 O 13 present in the insulation coating (3) on the strain region (D) in a cross-sectional view of a surface parallel to the rolling direction and a sheet thickness direction of the base steel sheet (1). (M means at least one or both of Fe and Cr.)
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公开(公告)号：EP3913095A1
公开(公告)日：2021-11-24
申请号：EP20742057.1
申请日：2020-01-16
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH 2 O/PH 2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al 2 O 3 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, 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：EP3913073A1
公开(公告)日：2021-11-24
申请号：EP20740798.2
申请日：2020-01-16
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH 2 O/PH 2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al 2 O 3 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, 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：EP3287537B1
公开(公告)日：2020-01-29
申请号：EP16783138.7
申请日：2016-04-19
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公开(公告)号：EP3913108A1
公开(公告)日：2021-11-24
申请号：EP20741050.7
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/m 2 per one surface of the decarburization annealed sheet.
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公开(公告)号：EP3913098A1
公开(公告)日：2021-11-24
申请号：EP20740801.4
申请日：2020-01-16
摘要： This grain-oriented electrical steel sheet includes a steel sheet, an insulation coating disposed on the steel sheet, and a spinel present at a part on the steel sheet at an interface between the steel sheet and the insulation coating by being fitted into the insulation coating, in which an amount of the spinel is 5 to 50 mg/m 2 per unit area of a surface of the steel sheet.
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公开(公告)号：EP3913088A1
公开(公告)日：2021-11-24
申请号：EP20741641.3
申请日：2020-01-16
摘要： The method for manufacturing a grain-oriented electrical steel sheet is a method for manufacturing a grain-oriented electrical steel sheet including a strain region forming process of irradiating the 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) with an electron beam and forming a strain region (D) which extends in a direction intersecting a rolling direction of the base steel sheet (1) on a surface of the base steel sheet (1), wherein, in the strain region forming process, a temperature of a central portion of the strain region (D) in the rolling direction of the base steel sheet (1) and an extension direction of the strain region (D) is heated to 800°C or higher and 2000°C or lower.
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公开(公告)号：EP3913100A1
公开(公告)日：2021-11-24
申请号：EP20741725.4
申请日：2020-01-16
摘要： This grain-oriented electrical steel sheet does not have a forsterite film present between a base steel sheet and a tension-insulation coating, in which the base steel sheet contains a predetermined element in a predetermined amount, and in a case in which a cross section perpendicular to a rolling direction of the base steel sheet is viewed, when a region having a length of 10 µm from a surface of the base steel sheet toward the inside of the base steel sheet in a sheet thickness direction of the base steel sheet and a length of 20 mm in a direction perpendicular to the sheet thickness direction is an observation region, needle-like inclusions having a length of 1 µm or more are not present in the observation region.
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公开(公告)号：EP3913099A1
公开(公告)日：2021-11-24
申请号：EP20741646.2
申请日：2020-01-16
摘要： A grain-oriented electrical steel sheet of the present invention has a base steel sheet, an amorphous oxide layer formed on the base steel sheet, and a tension-insulation coating formed on the amorphous oxide layer, in which the base steel sheet contains, as a chemical composition, by mass%, C: 0.085% or less, Si: 0.80 to 7.00%, Mn: 1.50% or less, acid-soluble Al: 0.065% or less, S: 0.013% or less, Cu: 0 to 0.80%, N: 0 to 0.012%, P: 0 to 0.50%, Ni: 0 to 1.00%, Sn: 0 to 0.30%, and Sb: 0 to 0.30%, a remainder is Fe and an impurity, a surface glossiness Gs20(A) in a direction parallel to a rolling direction is 2.0 to 70, and a surface glossiness Gs20(B) in a direction perpendicular to the rolling direction is 2.0 to 70.
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