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公开(公告)号：US11499059B2
公开(公告)日：2022-11-15
申请号：US16482663
申请日：2018-03-23
摘要： An electrical steel sheet is described, which has an insulating coating on its surface. The insulating coating is free of chromium and comprises plate-like particles of inorganic compound and a metal phosphate. The plate-like particles of inorganic compound are in the form of secondary particles, which are formed by aggregating primary particles, and present in an amount of not less than 0.1 parts by mass and not greater than 20 parts by mass, with respect to 100 parts by mass of the metal phosphate. The secondary particles have an average particle diameter of no less than 0.05 μm and no greater than 5 μm, and have a specific surface area of 1 to 80 m2/g. The primary particles have an aspect ratio of 50 to 1000. The electrical steel sheet has excellent heat resistance, corrosion resistance, appearance, and insulating properties.
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公开(公告)号：US11866797B2
公开(公告)日：2024-01-09
申请号：US17264207
申请日：2019-11-01
CPC分类号： C21D8/12 , C21D9/0012 , C21D9/46 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , H01F1/14775 , C22C2202/02
摘要： This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+0.5×Mn≥4.3], and an average grain size of the base metal is more than 40 μm and 120 μm or less.
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3.发明授权公开(公告)号：US11021771B2
公开(公告)日：2021-06-01
申请号：US16470078
申请日：2018-01-16
发明人： Hiroyoshi Yashiki , Yoshiaki Natori , Kazutoshi Takeda , Susumu Mukawa , Takuya Matsumoto , Koji Fujita , Takashi Morohoshi , Masafumi Miyazaki
IPC分类号： C21D9/46 , C21D8/12 , C21D6/00 , C22C38/60 , C22C38/14 , C22C38/06 , C22C38/00 , H01F1/16 , C22C38/04
摘要： A non-oriented electrical steel sheet contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.0% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, O: 0.0110% to 0.0350%, Sn: 0% to 0.050%, Sb: 0% to 0.050%, Ti: more than 0% and 0.0050% or less, and a remainder including Fe and impurities, in which Sn+Sb: 0.050% or less, Si−0.5×Mn: 2.0% or more, and an O content in a sheet thickness central portion excluding a surface layer portion which is a range from a front surface and a rear surface to a position of 10 μm in a depth direction is less than 0.0100%.
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公开(公告)号：US12009709B2
公开(公告)日：2024-06-11
申请号：US18038949
申请日：2022-03-30
发明人： Tesshu Murakawa , Yoshiaki Natori
CPC分类号： H02K15/02 , C21D9/46 , H02K1/02 , H02K2213/03
摘要： A rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which a {111} orientation intensity (A) of a core material of the stator is in a range of 2 to 30, a {111} orientation intensity (B) of a core material of the rotor is in a range of 1 to 15, and both the orientation intensities satisfy a relationship of an expression (1) A>B.
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5.发明授权公开(公告)号：US11124854B2
公开(公告)日：2021-09-21
申请号：US16487020
申请日：2018-03-07
IPC分类号： C21D9/46 , C22C38/34 , C22C38/16 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
摘要： This non-oriented electrical steel sheet including, as a chemical composition, by mass %: C: 0.0100% or less; Si: more than 3.0% and 5.0% or less; Mn: 0.1 to 3.0%; P: 0.20% or less: S: 0.0018% or less: N: 0.0040% or less; Al: 0 to 0.9%; one or more selected from the group consisting of Sn and Sb: 0 to 0.100%; Cr 0 to 5.0%; Ni: 0 to 5.0%; Cu: 0 to 5.0%; Ca: 0 to 0.01%; rare earth elements (REM): 0 to 0.010%; and a remainder including Fe and impurities, in which an area ratio of a crystal structure A composed of crystal grains having a grain size of 100 μm or greater in a cross section parallel to a rolled surface of the non-oriented electrical steel sheet is 1 to 30%, an average grain size of a crystal structure B that is a crystal structure other than the crystal structure A is 25 μm or less, and a Vickers hardness HvA of the crystal structure A and a Vickers hardness HvB of the crystal structure B satisfy HvA/HvB≤1.000.
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公开(公告)号：US12033776B2
公开(公告)日：2024-07-09
申请号：US18276857
申请日：2022-03-30
CPC分类号： H01F1/14783 , C21D6/005 , C21D6/008 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C23C22/03 , C22C2202/02
摘要： This non-oriented electrical steel sheet includes a base steel sheet (10); and an insulation coating (20) formed on a surface of the base steel sheet (10), in which the insulation coating (20) contains a metal phosphate and an organic resin, an arithmetic mean of a center line average roughness Ra75 of the insulation coating (20) in a rolling direction of the base steel sheet (10) and a center line average roughness Ra75 of the insulation coating (20) in a direction perpendicular to the rolling direction is 0.20 to 0.50 μm, and the amount of nitrogen in the insulation coating (20) is 0.05 to 5.00 mass %.
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公开(公告)号：US12024762B2
公开(公告)日：2024-07-02
申请号：US18279161
申请日：2022-03-31
发明人： Minako Fukuchi , Yoshiaki Natori , Tesshu Murakawa
CPC分类号： C22C38/02 , C21D9/46 , C22C38/004 , C22C38/06 , H01F1/147
摘要： A non-oriented electrical steel sheet has a chemical composition in which α-γ transformation can occur and which contains at least, in terms of mass %, at most 0.010% of C, 1.50% to 4.00% of Si, 0.0001% to 1.0% of sol. Al, at most 0.010% of S, at most 0.010% of N, and a total of 2.50% to 5.00% of at least one selected from the group consisting of Mn, Ni, and Cu, with the balance including Fe and impurities, wherein when an average grain size of {411} crystal grains is defined as d411 and an average grain size of {111} crystal grains is defined as d111, d411/d111≥1.10.
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公开(公告)号：US11377705B2
公开(公告)日：2022-07-05
申请号：US16793670
申请日：2020-02-18
IPC分类号： C21D8/12 , C21D9/46 , H01F1/16 , C22C38/60 , C22C38/00 , B32B15/18 , B32B15/04 , B22D11/00 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A grain-oriented electrical steel sheet includes a steel layer and an insulation coating arranged in directly contact with the steel layer thereon. The steel layer includes, as a chemical composition, by mass %, 2.9 to 4.0% of Si, 2.0 to 4.0% of Mn, 0 to 0.20% of Sn, and 0 to 0.20% of Sb. In the steel layer, a silicon content and a manganese content expressed in mass % satisfy 1.2%≤Si−0.5×Mn≤2.0%, and a tin content and an antimony content expressed in mass % satisfy 0.005%≤Sn+Sb≤0.20%.
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公开(公告)号：US11279985B2
公开(公告)日：2022-03-22
申请号：US16606107
申请日：2018-07-19
发明人： Yoshiaki Natori , Kazutoshi Takeda , Hiroyoshi Yashiki , Miho Tomita , Hiroshi Fujimura , Takeaki Wakisaka , Tesshu Murakawa , Takuya Matsumoto , Hiroki Hori , Yuuya Gohmoto , O Uyama
IPC分类号： C21D9/46 , H01F1/147 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16
摘要： A non-oriented electrical steel sheet includes, as a chemical composition, by mass %: C: 0.0015% to 0.0040%; Si: 3.5% to 4.5%; Al: 0.65% or less; Mn: 0.2% to 2.0%; Sn: 0% to 0.20%; Sb: 0% to 0.20%; P: 0.005% to 0.150%; S: 0.0001% to 0.0030%; Ti: 0.0030% or less; Nb: 0.0050% or less; Zr: 0.0030% or less; Mo: 0.030% or less; V: 0.0030% or less; N: 0.0010% to 0.0030%; O: 0.0010% to 0.0500%; Cu: less than 0.10%; Ni: less than 0.50%; and a remainder including Fe and impurities, in which a product sheet thickness is 0.10 mm to 0.30 mm, an average grain size is 10 μm to 40 μm, an iron loss W10/800 is 50 W/Kg or less, a tensile strength is 580 MPa to 700 MPa, and a yield ratio is 0.82 or more.
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公开(公告)号：US11053574B2
公开(公告)日：2021-07-06
申请号：US16470122
申请日：2018-01-16
发明人： Hiroyoshi Yashiki , Yoshiaki Natori , Kazutoshi Takeda , Susumu Mukawa , Takuya Matsumoto , Koji Fujita , Takashi Morohoshi , Masafumi Miyazaki
IPC分类号： C22C38/60 , C22C38/00 , C22C38/14 , C22C38/04 , C22C38/06 , C22C38/02 , C21D9/46 , C21D8/12 , C21D6/00 , H01F1/147
摘要： A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si−0.5×Mn: 2.0% or more, and Si+0.5×Mn: 3.8% or more.
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