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公开(公告)号：EP4455341A1
公开(公告)日：2024-10-30
申请号：EP22911824.5
申请日：2022-12-19
申请人： POSCO Co., Ltd
发明人： LEE, Hunju , SHIN, Su-Yong , KIM, Yunsu
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：EP4455335A1
公开(公告)日：2024-10-30
申请号：EP22911927.6
申请日：2022-12-21
申请人： POSCO Co., Ltd
发明人： KWON, Soobin , KIM, Yunsu
摘要： A non-oriented electrical steel sheet according to one embodiment of the present invention comprises a steel sheet base material and an insulation film positioned on the steel sheet base material, satisfies the following formula 2 before stress relief annealing, and satisfies the following formula 3 after stress relief annealing, the steel sheet base material comprising, by wt%, 2.0-6.5% of Si, 0.1-1.3% of Al, 0.3-2.0% of Mn, 0.03% or less of Sn (excluding 0%), 0.02% or less of Sb (excluding 0%) and the balance of Fe and other inevitable impurities and satisfying the following formula 1. 0.030 ≥ Sn + Sb ≥ 0.005 0.1 ≥ Mn film / Mn50 10 ≥ Mn film / Mn50 ≥ 1 (In formula 1 to formula 3, [Sn] and [Sb] represent the amounts of Sn and Sb, respectively, [Mn film] represents the average amount (wt%) of Mn in the insulation film, and [Mn50] represents the amount (wt%) of Mn at a depth of 50 µm from the interface between the steel sheet base material and the insulation film toward the inside of the steel sheet base material.)
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公开(公告)号：EP4455332A1
公开(公告)日：2024-10-30
申请号：EP22911901.1
申请日：2022-12-20
申请人： POSCO Co., Ltd
发明人： HONG, Jaewan , JOO, Hyung Don , PARK, Junesoo
IPC分类号： C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/00 , C22C38/34 , C22C38/12 , C21D8/12 , H01F1/147
摘要： A non-oriented electrical steel sheet according to one embodiment of the present invention comprises, by wt%, 1.4-3.0 % of Si; 0.001-1.5 % of Mn; and 0.001-0.2 % of Al, with the remainder of Fe and inevitable impurities, wherein a thickness deviation in the direction perpendicular to a rolling direction is 1.5 µm or less per 5 mm length, and a thickness derivation in the rolling direction is 10 µm or less per 1000 m length.
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公开(公告)号：EP4436007A1
公开(公告)日：2024-09-25
申请号：EP22895705.6
申请日：2022-11-18
发明人： MURAKAWA, Tesshu , KANO, Satoshi
摘要： This rotary electric machine includes a stator, a rotor, and a housing that houses the stator and the rotor, A which is an {111} orientation strength of a base steel sheet of a non-oriented electrical steel sheet included in the stator is less than 15, B which is an { 111 } orientation strength of a base steel sheet of the non-oriented electrical steel sheet included in the rotor is 2 to 30, the A and the B satisfy a relationship of B/A > 1.0, C which is an {411} orientation strength of a base steel sheet of the non-oriented electrical steel sheet included in the stator is 2 to 50, D which is an {411} orientation strength of a base steel sheet of the non-oriented electrical steel sheet included in the rotor is 1 to 40, and the C and D satisfy a relationship of C/D > 1.0.
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公开(公告)号：EP4414465A1
公开(公告)日：2024-08-14
申请号：EP22889745.0
申请日：2022-10-13
摘要： Provided is an annealing facility in which a steel sheet after cold rolling is sequentially threaded through an annealing furnace having at least a first region, a second region, and a third region to continuously undergo finish annealing. Each of the regions of the annealing furnace is independently controllable in terms of the gas composition and the dew point of the atmosphere. The second region is composed of a heating zone, a soaking zone, and a cooling zone all having atmospheric temperatures of 900°C or higher, with an atmospheric gas controlled to have a nitrogen content of 30 vol% or less and a dew point of -40°C or lower. Further, an electrical steel sheet, preferably a non-oriented electrical steel sheet with low iron loss is produced by performing finish annealing using this annealing facility.
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公开(公告)号：EP3913075B1
公开(公告)日：2024-08-07
申请号：EP20740803.0
申请日：2020-01-16
IPC分类号： C21D8/12 , C21D9/46 , H01F1/147 , C23C22/33 , C21D1/76 , C22C38/02 , H01F1/18 , C21D1/26 , C23C22/74 , C22C38/04 , C22C38/06 , C21D6/00 , C22C38/16 , C22C38/00 , C22C38/60
CPC分类号： C21D9/46 , C22C38/60 , C21D2201/0520130101 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D1/76 , C21D1/26 , C21D8/1261 , C21D8/1255 , C21D6/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/001 , C22C38/008 , C23C22/33 , C23C22/74 , H01F1/18 , C21D8/1222 , C21D8/1233 , Y02P10/20
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公开(公告)号：EP4406670A1
公开(公告)日：2024-07-31
申请号：EP22907416.6
申请日：2022-12-12
发明人： TANAKA, Takaaki , OKUBO, Tomoyuki
CPC分类号： B21B1/22 , B21B3/02 , H01F1/147 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/06 , C22C38/60 , Y02P10/20
摘要： A non-oriented electrical steel sheet according to the present invention includes, by mass%, C: 0.010% or less, Si: 1.0% or more and 5.0% or less, Mn: 0.05% or more and 5.0% or less, P: 0.1% or less, S: 0.01% or less, Al: 3.0% or less, N: 0.005% or less, and the balance being Fe and inevitable impurities, wherein an average crystal grain size is 50 µm or less, and a sum SA of area ratios of crystal grains with oriented in a rolling direction or a direction perpendicular to the rolling direction and a sum SB of area ratios of crystal grains with oriented in the rolling direction or the direction perpendicular to the rolling direction satisfy SA - SB ≥ 0.
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8.发明公开
公开(公告)号：EP4400609A1
公开(公告)日：2024-07-17
申请号：EP22887233.9
申请日：2022-10-31
摘要： This disclosure discloses a method for manufacturing a grain-oriented electrical steel sheet and a grain-oriented electrical steel sheet manufactured by the method. The method comprises heating a slab having a predetermined composition by induction heating in a frequency range of 20 to 1000 Hz under predetermined conditions, where the average current flowing in the coil is monotonically decreased as time passes during slab heating; subjecting the slab to finish rolling performed with the rolling finish temperature set to 950 °C or lower at one or both of the leading or trailing end; soaking the hot-rolled sheet at 750 °C or higher for 5 to 90 seconds to obtain a hot band annealed sheet; then cold rolling the annealed sheet once, or twice or more with intermediate annealing performed therebetween to obtain a cold-rolled sheet having a final sheet thickness; and subjecting the cold-rolled sheet to primary and secondary recrystallization annealings.
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公开(公告)号：EP3913096B1
公开(公告)日：2024-06-12
申请号：EP20742060.5
申请日：2020-01-16
IPC分类号： C21D1/76 , C21D3/04 , C21D6/00 , C22C38/02 , C22C38/04 , C22C38/06 , C21D8/12 , C21D9/46 , C21D10/00 , C22C38/00 , C22C38/60 , C23C22/08 , C23C22/33 , C23C22/74 , H01F1/18 , C23G1/08 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/24 , H01F1/147
CPC分类号： C21D9/46 , C22C38/60 , C21D2201/0520130101 , C21D6/008 , C21D8/1255 , C21D8/1283 , C21D8/1277 , C21D1/76 , C21D10/00 , C21D8/1233 , C22C38/02 , C22C38/04 , C21D3/04 , C22C38/06 , C22C38/001 , C22C38/16 , C22C38/14 , C22C38/002 , C22C38/12 , C22C38/008 , C22C38/08 , C22C38/24 , C23G1/081 , C23C22/33 , C23C22/08 , C23C22/74 , H01F1/14783 , H01F1/18 , Y02P10/20
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公开(公告)号：EP3913088B1
公开(公告)日：2024-05-22
申请号：EP20741641.3
申请日：2020-01-16
IPC分类号： C21D8/12 , C21D9/46 , C22C38/00 , C22C38/60 , H01F1/147 , C23C22/00 , B23K26/352 , C22C38/02 , C22C38/04 , H01F1/18 , C21D1/76 , C21D1/26 , C23C28/04 , C21D6/00 , C22C38/06 , C23C8/26 , C23C22/08 , C23C22/74 , B23K101/36 , B23K103/04 , B23K103/06 , B23K15/00 , B23K103/16
CPC分类号： C21D9/46 , C22C38/02 , C22C38/04 , C21D1/26 , C21D8/1261 , C21D1/76 , C23C8/26 , C21D8/1283 , C21D8/1272 , C21D2201/0520130101 , C21D6/008 , C22C38/06 , C22C38/001 , C21D8/1255 , C23C22/08 , C23C22/74 , H01F1/18 , C23C28/04 , C21D8/1294 , B23K2103/17220180801 , B23K2103/0420180801 , B23K2101/3620180801 , B23K15/0086 , B23K15/0093 , C22C38/004
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