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公开(公告)号：US20240233992A9
公开(公告)日：2024-07-11
申请号：US18547693
申请日：2022-03-02
发明人： Shigehiro TAKAJO , Hiroi YAMAGUCHI
IPC分类号： H01F1/147 , C21D1/18 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/34 , C22C38/42 , C22C38/48 , C22C38/60
CPC分类号： H01F1/14783 , C21D1/18 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/1211 , C21D8/1222 , C21D8/1233 , C21D8/125 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D8/1288 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/34 , C22C38/42 , C22C38/48 , C22C38/60 , C22C2202/02
摘要： The method includes slab-heating a steel slab to a temperature of higher than a γ-phase precipitation temperature and 1380° C. or lower, subjecting the steel slab to rough rolling including at least two passes of rolling at a predetermined temperature with an introduced sheet thickness true strain εt of 0.50 or more and to finish rolling with a rolling finish temperature of 900° C. or higher to obtain a hot-rolled sheet, cooling the hot-rolled sheet for 1 second or longer at a cooling rate of 70° C./s or higher within 2 seconds after finish rolling, coiling the sheet at a coiling temperature of 600° C. or lower, performing hot-rolled sheet annealing for soaking at a predetermined soaking temperature, and then performing cold rolling, primary recrystallization annealing, and secondary recrystallization annealing.
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12.发明授权公开(公告)号：US12033791B2
公开(公告)日：2024-07-09
申请号：US17769049
申请日：2020-09-16
IPC分类号： B05D3/00 , B05D7/14 , B05D7/24 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/60 , C23C22/07 , H01F41/00
CPC分类号： H01F41/00 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/60 , C23C22/07 , C22C2202/02
摘要： A method for forming a film on a surface of a steel sheet includes applying a treatment solution for forming a film containing a fibrous material to the surface of the steel sheet by using a coater under a condition in which a difference between a speed of the steel sheet and a speed of an applicator of the coater is 1.0 m/min or more, inclining the surface of the steel sheet, to which the treatment solution for forming a film has been applied, at an angle of 10° or more with respect to a horizontal plane until drying is started, and thereafter drying the steel sheet.
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公开(公告)号：US20240153684A1
公开(公告)日：2024-05-09
申请号：US18284032
申请日：2022-03-30
发明人： Takeaki WAKISAKA , Yoshiaki NATORI
IPC分类号： H01F1/147 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/28 , C22C38/34 , C22C38/60
CPC分类号： H01F1/14791 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/125 , C21D8/1255 , C21D8/1261 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/28 , C22C38/34 , C22C38/60 , C22C2202/02
摘要： In this non-oriented electrical steel sheet, an area proportion of crystal grains having a crystal grain size of less than 200 μm is 10% or lower when a boundary with a crystal orientation difference of 2° or more and less than 15° is regarded as a crystal grain boundary in a cross section parallel to a steel sheet surface.
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公开(公告)号：US11970751B2
公开(公告)日：2024-04-30
申请号：US17421779
申请日：2020-01-16
IPC分类号： C21D9/46 , C21D3/04 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147
CPC分类号： C21D9/46 , C21D3/04 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1283 , C21D8/1294 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147 , C21D2221/00
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 M2P4O13 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：US20240136095A1
公开(公告)日：2024-04-25
申请号：US18547693
申请日：2022-03-02
发明人： Shigehiro TAKAJO , Hiroi YAMAGUCHI
IPC分类号： H01F1/147 , C21D1/18 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/34 , C22C38/42 , C22C38/48 , C22C38/60
CPC分类号： H01F1/14783 , C21D1/18 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/1211 , C21D8/1222 , C21D8/1233 , C21D8/125 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D8/1288 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/34 , C22C38/42 , C22C38/48 , C22C38/60 , C22C2202/02
摘要： The method includes slab-heating a steel slab to a temperature of higher than a γ-phase precipitation temperature and 1380° C. or lower, subjecting the steel slab to rough rolling including at least two passes of rolling at a predetermined temperature with an introduced sheet thickness true strain εt of 0.50 or more and to finish rolling with a rolling finish temperature of 900° C. or higher to obtain a hot-rolled sheet, cooling the hot-rolled sheet for 1 second or longer at a cooling rate of 70° C./s or higher within 2 seconds after finish rolling, coiling the sheet at a coiling temperature of 600° C. or lower, performing hot-rolled sheet annealing for soaking at a predetermined soaking temperature, and then performing cold rolling, primary recrystallization annealing, and secondary recrystallization annealing.
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公开(公告)号：US11952641B2
公开(公告)日：2024-04-09
申请号：US17437703
申请日：2019-03-20
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C21D8/12 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C23G1/08 , H01F1/147
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C23G1/08 , H01F1/147 , C22C2202/02
摘要： A non oriented electrical steel sheet consists of a silicon steel sheet and an insulation coating. The silicon steel sheet includes an internally oxidized layer containing SiO2 in a surface thereof, an average thickness of the internally oxidized layer is 0.10 to 5.0 μm, and a Vickers hardness in the internally oxidized layer is 1.15 to 1.5 times as compared with a Vickers hardness in a thickness central area.
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公开(公告)号：US11946113B2
公开(公告)日：2024-04-02
申请号：US17421802
申请日：2020-01-16
IPC分类号： C21D9/46 , C21D8/02 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/60 , C23G1/08
CPC分类号： C21D9/46 , C21D8/0257 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/60 , C23G1/08 , C21D2201/05
摘要： A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor, a smoothing process where chemical-polished is conducted to control average roughness Ra, and an insulation coating forming process where insulation coating forming solution in which crystalline phosphide is included is applied.
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公开(公告)号：US20240035129A1
公开(公告)日：2024-02-01
申请号：US18277548
申请日：2022-03-30
摘要： This non-oriented electrical steel sheet includes: a base steel sheet; and an insulation coating formed on a surface of the base steel sheet, in which the insulation coating contains a metal phosphate and an organic resin, a moisture content of the insulation coating is 0.003 to 0.03 wt %, and a contact angle of water on the insulation coating is 55° to 85°.
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公开(公告)号：US11884988B2
公开(公告)日：2024-01-30
申请号：US17256891
申请日：2018-07-13
CPC分类号： C21D9/46 , C21D8/1222 , C21D8/1233 , C21D8/1288 , C22C38/004 , C22C38/02 , C23C8/02 , C23C8/18 , C21D2201/05
摘要： In a base sheet for a grain-oriented electrical steel sheet of the present invention, an amount of surface oxygen x per one surface of the base sheet and a value y of a peak (ΔR/R0 @1250 cm−1) of SiO2 on the surface of the base sheet obtained by infrared reflection spectroscopy satisfy y≥1500x2.5 and y≥0.24. A method of manufacturing the base sheet for a grain-oriented electrical steel sheet of the present invention includes: adjusting the amount of surface oxygen per one surface of a final-annealed grain-oriented silicon steel sheet to more than 0.01 g/m2 and 0.05 g/m2 or less, or more than 0.05 g/m2 and 0.10 g/m2 or less; and performing thermal oxidation annealing in an atmosphere in which an oxidation potential represented by a ratio PH2O/PH2 of water vapor pressure to hydrogen pressure is 0.0081 or less in a case where the amount of surface oxygen is more than 0.01 g/m2 and 0.05 g/m2 or less, or in an atmosphere in which the oxidation potential is 0.005 or less in a case where the amount of surface oxygen is more than 0.05 g/m2 and 0.10 g/m2 or less, at a soaking temperature of 1000° C. or lower to form an externally oxidized layer on a surface of the grain-oriented silicon steel sheet.
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公开(公告)号：US20240011112A1
公开(公告)日：2024-01-11
申请号：US17636776
申请日：2020-08-26
发明人： Feng ZHANG , Bo WANG , Kanyi SHEN , Baojun LIU , Guobao LI , Shuangjie CHU
IPC分类号： C21D9/46 , C22C38/16 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C22C33/04 , C21D6/00 , H01F1/147
CPC分类号： C21D9/46 , C22C38/16 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/002 , C22C38/001 , C22C38/004 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1283 , C22C33/04 , C21D6/005 , C21D6/008 , H01F1/14791
摘要： The present invention discloses a Cu-containing non-oriented electrical steel plate having high cleanliness, comprising the following chemical elements in percentage by mass: 0
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