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1.发明公开公开(公告)号：US20240279763A1
公开(公告)日：2024-08-22
申请号：US18570067
申请日：2022-06-30
IPC分类号： C21D9/46 , B21B3/02 , C21D1/18 , C21D6/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/60 , H01F1/147
CPC分类号： C21D9/46 , B21B3/02 , C21D1/18 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/60 , H01F1/14783 , C21D2201/05 , C22C2202/02
摘要： To provide a method of producing a grain-oriented electrical steel sheet that can stably produce a grain-oriented electrical steel sheet with low iron loss and little variation in iron loss using a tandem mill. Disclosed is a method of producing a grain-oriented electrical steel sheet, including: hot rolling; a single cycle of cold rolling, or multiple cycles of cold rolling with intermediate annealing in between; decarburization annealing; and secondary recrystallization annealing, in which annealing preceding final cold rolling is performed with an average cooling rate of 20° C./s or higher in a temperature range from 800° C. to 350° C., and the final cold rolling is performed using a tandem mill, where the steel sheet is heated to a temperature range from 70° C. to 200° C. and then cooled to 60° C. or lower within 10 seconds before being introduced into the first pass of the tandem mill.
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公开(公告)号：US20240271241A1
公开(公告)日：2024-08-15
申请号：US18561448
申请日：2022-05-24
发明人： Takashi TERASHIMA , Takuya YAMADA
IPC分类号： C21D9/46 , C21D1/30 , C21D1/76 , C21D6/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/147
CPC分类号： C21D9/46 , C21D1/30 , C21D1/76 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/14775 , C21D2201/05 , C22C2202/02
摘要： Provided is a method for manufacturing a grain-oriented electrical steel sheet with excellent uniformity of magnetic properties in the sheet transverse direction without increasing production costs. An ignition loss of an annealing separator after drying: IGLOSS (mass %), a storage time of a cold-rolled steel sheet: T (hr), and a carbon dioxide concentration in a storage environment of the cold-rolled steel sheet: A (mass ppm) satisfy the following formula (1):
A
×
IGLOSS
≤
-
1500
×
Ln
(
T
)
+
9000.
(
1
)-
公开(公告)号：US20240221982A1
公开(公告)日：2024-07-04
申请号：US18287566
申请日：2022-08-09
申请人： POSCO Co., Ltd
发明人： Junesoo Park , Jaewan Hong , Dae Hyun Song
IPC分类号： H01F1/147 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16
CPC分类号： H01F1/14783 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16 , C22C2202/02
摘要： An exemplary embodiment of the present invention provides a non-oriented electrical steel sheet and a method for manufacturing same. The non-oriented electrical steel sheet comprises, by wt %, 2.5-4% of Si, 0.1-1.0% of Mn, 0.001-0.005% of S, 0.002-0.01% of Cu, and the remainder of Fe and inevitable impurities, wherein FGS (average grain size of grains in the lower 10% or less based on grain size among total grains)≥15 μm.
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公开(公告)号：US20240200175A1
公开(公告)日：2024-06-20
申请号：US18287975
申请日：2022-12-19
申请人： POSCO Co., Ltd
发明人： Hunju Lee , Su-Yong Shin , Yunsu Kim
IPC分类号： C22C38/02 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/60
CPC分类号： C22C38/02 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D9/46 , C22C38/002 , C22C38/004 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/60
摘要： A non-oriented electrical steel sheet includes by wt %, Si: 3.0 to 4.0%, Al: 0.1 to 1.5%, Mn: 0.1 to 0.5%, Cr: 2 to 20% of Mn content, a sum of Sn and Sb: 0.006 to 0.1%, C: 0.0010 to 0.0050%, and 0.0003 to 0.0050% of at least one of N, S, Ti, Nb, and V, and balance being Fe and unavoidable impurities, in which an area fraction of a grain having a grain diameter which is 10% or less of a thickness of the steel sheet is 0.5% or more, a number fraction of the grain is 20% or more, and an average grain diameter from a central layer to a surface layer in a thickness direction of the steel sheet satisfies a relationship of D(surface)/D(center)≥0.6.
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公开(公告)号：US20240177901A1
公开(公告)日：2024-05-30
申请号：US18283162
申请日：2022-03-28
IPC分类号： H01F1/18 , C03C8/02 , C03C10/00 , C21D6/00 , C21D8/12 , C21D9/46 , C21D10/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C23D3/00 , C23D5/04 , C23D13/00
CPC分类号： H01F1/18 , C03C8/02 , C03C10/00 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1283 , C21D8/1288 , C21D9/46 , C21D10/005 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C23D3/00 , C23D5/04 , C23D13/00 , C03C2204/00 , C03C2207/04 , C21D2201/05 , C22C2202/02
摘要： This grain-oriented electrical steel sheet includes a base steel sheet, a glass coating formed on the base steel sheet, and a tension-applied insulation coating formed on the glass coating, in which, in the base steel sheet, a plurality of linear strain regions that extend continuously or intermittently in a direction intersecting with a rolling direction are present, the plurality of linear strain regions are each 210 μm or less in width in the rolling direction, the plurality of linear strain regions are parallel to each other, intervals of linear strain regions adjacent to each other in the rolling direction are 10 mm or less, and magnetostriction λ0-pb in a unit of μm/m when the grain-oriented electrical steel sheet is excited up to 1.7 T and magnetostriction λ0-pa in a unit of μm/m when the grain-oriented electrical steel sheet is heat-treated at 800° C. for 4 hours and then excited up to 1.7 T satisfy 0.02≤λ0-pb−λ0-pa≤0.20.
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6.发明公开公开(公告)号：US20240170190A1
公开(公告)日：2024-05-23
申请号：US18283149
申请日：2021-04-14
发明人： Yoshihiro ARITA
IPC分类号： H01F1/153 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
CPC分类号： H01F1/153 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1261 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C21D2211/005 , C22C2202/02
摘要： A hot rolled steel sheet is for a non oriented electrical steel sheet, wherein an amount of solid-soluted Ti is 0.0005% or less, Ti carbides with an equivalent circle diameter of 10 to 50 nm exist in a grain and at a grain boundary of a ferrite grain, 10 to 100 number % of the Ti carbides which exist in the grain are compositely precipitated with a Mn sulfide, and a number density of the Ti carbides which exist at the grain boundary is 0.1 pieces/μm or less.
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公开(公告)号：US20240154472A1
公开(公告)日：2024-05-09
申请号：US18278761
申请日：2022-03-30
发明人： Tesshu MURAKAWA , Yoshiaki NATORI
IPC分类号： H02K1/02 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/147 , H01F41/02
CPC分类号： H02K1/02 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1277 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/14783 , H01F41/02 , C22C2202/02
摘要： The rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which at least one of the following conditions 1 and 2 is satisfied.
Condition 1: a thermal conductivity A of a non-oriented electrical steel sheet that is used for a core of the stator is in a range of 12 to 35 W/(m·K), a thermal conductivity B of a non-oriented electrical steel sheet that is used for a core of the rotor is in a range of 10 to 33 W/(m·K), and both the thermal conductivities have a relationship of an expression (1) of A>B
Condition 2: a thermal diffusivity A1 of the non-oriented electrical steel sheet that is used for the core of the stator is in a range of 3.0×10−6 to 9.0×10−6 m2/sW/(m·K), a thermal diffusivity B1 of the non-oriented electrical steel sheet that is used for the core of the rotor is in a range of 2.5×10−6 to 8.5×10−6 m2/sW/(m·K), and both the thermal diffusivities have a relationship of an expression (3) of A1>B1-
公开(公告)号：US11898215B2
公开(公告)日：2024-02-13
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
CPC分类号： C21D8/1283 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147 , C21D2201/05 , C22C2202/02
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：US20240038423A1
公开(公告)日：2024-02-01
申请号：US18268841
申请日：2021-12-15
申请人： POSCO Co., Ltd
发明人： Jaewan Hong , Junesoo Park , Yongsoo Kim , Suyong Shin
IPC分类号： H01F1/147 , C22C38/14 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/60 , C21D9/46 , C21D8/12 , C21D6/00
CPC分类号： H01F1/14766 , C22C38/14 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/004 , C22C38/002 , C22C38/60 , C22C38/001 , C21D9/46 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D8/1261 , C21D6/005 , C21D6/008 , C22C2202/02
摘要： The present invention may provide a non-oriented electrical steel sheet containing, by wt %, 2.10 to 3.80% of Si, 0.001 to 0.600% of Mn, 0.001 to 0.600% of Al, 0.001 to 0.100% of P, 0.0005 to 0.0100% of C, 0.001 to 0.010% of S, 0.0001 to 0.010% of N, 0.0005 to 0.0050% of Ti, 0.001 to 0.080% of Sn, 0.001 to 0.080% of Sb, 0.0005 to 0.0030% of Se, 0.0003 to 0.0010% of Ge, and a balance of Fe and inevitable impurities, the non-oriented electrical steel sheet having excellent iron loss and magnetic flux density and low strength.
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公开(公告)号：US20240038422A1
公开(公告)日：2024-02-01
申请号：US18268387
申请日：2021-12-17
申请人： POSCO Co., Ltd
发明人： Hunju LEE , Yongsoo KIM , Suyong SHIN
IPC分类号： H01F1/147 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/12 , C21D6/00 , C21D1/18 , C21D1/74
CPC分类号： H01F1/14766 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/004 , C22C38/002 , C22C38/001 , C21D9/46 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D6/005 , C21D6/008 , C21D1/18 , C21D1/74 , C22C2202/02
摘要： A non-oriented electrical steel sheet according to an exemplary embodiment of the present invention includes 3.3 to 4.0 weight % of Si; 0.4 to 1.5 weight % of Al; 0.2 to 1.0 weight % of Mn; 0.0015 to 0.0040 weight % of C; 0.0005 to 0.0020 weight % of N; 0.0005 to 0.0025 weight % of S; 0.005 to 0.01 weight % of Mo; 0.0005 to 0.0020 weight % of Ti; 0.0005 to 0.0020 weight % of Nb; and 0.0005 to 0.0020 weight % of V, with the remainder including Fe and other unavoidable impurities.
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