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公开(公告)号：US11459629B2
公开(公告)日：2022-10-04
申请号：US16076403
申请日：2017-02-16
IPC分类号： C21D8/12 , C22C38/60 , H01F1/147 , C22C38/00 , C22C38/12 , C22C38/06 , C21D1/28 , C22C38/08 , H01F1/16 , C22C38/14 , C22C38/34 , C22C38/16 , C22C38/02 , C21D9/46 , C22C38/04 , C21D8/02 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54
摘要： To improve and stabilize magnetic properties, a steel sheet is soaked in a temperature range of 1000° C. or more and 1120° C. or less for 200 sec or less and then soaked in a temperature range of 650° C. or more and 1000° C. or less for 200 sec or less in annealing before final cold rolling, and the amount of Al in precipitates after the annealing before the final cold rolling is limited to 50% or more of the total amount of Al contained in the steel slab.
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公开(公告)号：US09978489B2
公开(公告)日：2018-05-22
申请号：US14915708
申请日：2014-09-25
IPC分类号： C21D8/12 , C21D8/02 , C21D9/46 , H01F1/16 , C22C38/00 , C22C38/02 , C22C38/60 , C21D1/34 , C21D6/00 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/44 , C22C38/46 , C23C8/26
CPC分类号： H01F1/16 , C21D1/34 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D9/46 , C21D2201/05 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/44 , C22C38/46 , C22C38/60 , C23C8/26
摘要： Provides is a method of producing a grain oriented electrical steel sheet by heating a steel slab having a predetermined composition, then subjecting the slab to hot rolling to obtain a hot rolled sheet, then optionally subjecting the hot rolled sheet to hot band annealing and subsequent cold rolling once, or twice or more with intermediate annealing performed therebetween to obtain a cold rolled sheet with final sheet thickness, then subjecting the cold rolled sheet to primary recrystallization annealing and subsequent secondary recrystallization annealing, in which the aging index AI of the steel sheet before final cold rolling is set to 70 MPa or less to effectively grow Goss-oriented grains to thereby obtain a grain-oriented electrical steel sheet with good magnetic properties, without the restriction of containing a relatively large amount of C.
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公开(公告)号：US09761360B2
公开(公告)日：2017-09-12
申请号：US14387953
申请日：2013-03-29
IPC分类号： H01F1/147 , C21D9/46 , C22C38/00 , C22C38/16 , H01F41/02 , C22C38/60 , H01F1/16 , C21D8/12 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08
CPC分类号： H01F1/14775 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1288 , C21D9/46 , C22C38/001 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/16 , C22C38/60 , H01F1/16 , H01F41/02
摘要： A method of manufacturing a grain oriented electrical steel sheet uses austenite (γ)-ferrite (α) transformation which develops excellent magnetic properties, uses Tα calculated from equation (1) and performs the first pass of rough hot rolling at a temperature of (Tα−100)° C. or higher with a rolling reduction of 30% or more, and further uses Tγmax calculated from equation (2) and performs any one pass of finish hot rolling in a temperature range of (Tγmax±50)° C. with a rolling reduction of 40% or more: Tα[° C.]=1383.98−73.29[% Si]+2426.33[% C]+271.68[% Ni] (1) Tγmax[° C.]=1276.47−59.24[% Si]+919.22[% C]+149.03[% Ni] (2) where [% A] represents content of element “A” in steel (mass %).
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公开(公告)号：US12104217B2
公开(公告)日：2024-10-01
申请号：US17593860
申请日：2020-03-27
IPC分类号： C21D9/46 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/147 , H01F1/18 , H01F41/02
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , H01F1/14775 , H01F1/18 , H01F41/02 , C21D2201/05 , C22C2202/02
摘要： Provided is a grain-oriented electrical steel sheet having a film that is effective for the magnetic properties of the steel sheet and particularly effective for iron loss reduction and has favorable adhesion. In a grain-oriented electrical steel sheet, an insulating film partially enters into a steel substrate to form an anchor part, a depth of the anchor part from the surface of the steel substrate is 3.5 μm or less, and a number of neck parts of 5 μm2 or less in area is 0.06/μm2 or less and a number of neck parts of 10 μm2 to 40 μm2 in area is 0.005/μm2 or more and 0.011/μm2 or less, where each neck part is a remaining part of the insulating film on the surface of the steel substrate when peeling the insulating film from the steel substrate in a bend test for the grain-oriented electrical steel sheet.
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公开(公告)号：US20200325555A1
公开(公告)日：2020-10-15
申请号：US16957461
申请日：2018-12-27
发明人： Masanori Takenaka , Makoto Watanabe , Yuiko Ehashi
IPC分类号： C21D9/46 , C22C38/60 , C22C38/50 , C22C38/48 , C22C38/34 , C22C38/32 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , C21D1/34 , H01F1/147
摘要： In a production of a grain-oriented electrical steel sheet by subjecting a steel slab containing a particular composition and further including an inhibitor-forming ingredient to hot rolling, hot-band annealing, cold rolling, primary recrystallization annealing combined with decarburization annealing and finish annealing, the steel slab satisfies a given relation between a content ratio of sol. Al to N and a final sheet thickness, and, in the finish annealing, the steel sheet is kept at a temperature zone of higher than 850° C. but not higher than 950° C. in heating process for 5 to 200 hours, heated to a temperature zone of 950 to 1050° C. at 5 to 30° C./hr and further subjected to purification treatment of keeping a temperature of not lower than 1100° C. for not less than 2 hours to provide a secondary recrystallization structure that has an average value of a diameter equivalent to a circle of 10 to 100 mm.
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公开(公告)号：US20150332822A1
公开(公告)日：2015-11-19
申请号：US14387953
申请日：2013-03-29
IPC分类号： H01F1/147 , C21D9/46 , C22C38/60 , C22C38/08 , H01F41/02 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/16 , C21D8/12 , C22C38/06
CPC分类号： H01F1/14775 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1288 , C21D9/46 , C22C38/001 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/16 , C22C38/60 , H01F1/16 , H01F41/02
摘要： A method of manufacturing a grain oriented electrical steel sheet uses austenite (γ)-ferrite (α) transformation which develops excellent magnetic properties, uses Tα calculated from equation (1) and performs the first pass of rough hot rolling at a temperature of (Tα−100)° C. or higher with a rolling reduction of 30% or more, and further uses Tγmax calculated from equation (2) and performs any one pass of finish hot rolling in a temperature range of (Tγmax±50)° C. with a rolling reduction of 40% or more: Tα[° C.]=1383.98−73.29[% Si]+2426.33[% C]+271.68[% Ni] (1) Tγmax[° C.]=1276.47−59.24[% Si]+919.22[% C]+149.03[% Ni] (2) where [% A] represents content of element “A” in steel (mass %).
摘要翻译： 晶粒取向电工钢板的制造方法使用产生优异磁性的奥氏体（γ） - 铁素体（α）相变，使用式（1）计算出的Tα，在（Tα）的温度下进行粗热轧的第一道次 -100）℃以上，轧制压下率为30％以上，进一步使用式（2）所算出的Tγmax，在（Tγmax±50）℃的温度范围内进行精加工热轧。 压下率为40％以上：Tα[℃] = 1383.98-73.29 [％Si] +2426.33 [％C] +271.68 [％Ni]（1）Tγmax[℃] = 1276.47-59.24 [ ％Si] +919.22 [％C] +149.03 [％Ni]（2）其中[％A]表示钢中元素“A”的含量（质量％）。
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公开(公告)号：US20240282491A1
公开(公告)日：2024-08-22
申请号：US18565274
申请日：2022-05-27
IPC分类号： H01F1/147 , C21D1/74 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/60
CPC分类号： H01F1/14775 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/007 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/50 , C22C38/60 , C21D2201/05 , C22C2202/02
摘要： A method for producing a grain-oriented electrical steel sheet includes: heating a steel slab containing a specific composition; subsequently performing hot rolling; performing hot-band annealing as necessary; performing cold rolling either once or two or more times with intermediate annealing between each rolling to obtain a cold-rolled sheet having a final sheet thickness; performing primary recrystallization annealing which also serves as decarburization annealing; and performing finishing annealing. In the method for producing a grain-oriented electrical steel sheet, the heating temperature for the slab is 1300° C. or higher. In the rough rolling of the hot rolling, one of rolling passes is performed in the temperature range of 1200° C. or higher, and subsequently, a next rolling pass is performed in an opposite direction after a time interval of 5 seconds or longer, with a total rolling reduction of the rough rolling achieved 75% or higher.
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公开(公告)号：US20240247347A1
公开(公告)日：2024-07-25
申请号：US18564171
申请日：2022-05-26
IPC分类号： C22C38/02 , C21D3/04 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/60
CPC分类号： C22C38/02 , C21D3/04 , C21D6/008 , C21D8/1205 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/60 , C21D2201/05
摘要： In the production of a grain-oriented electrical steel sheet by heating a steel slab containing, in mass %, C: 0.02 to 0.10%, Si: 2.5 to 5.5%, Mn: 0.01 to 0.30%, S: 0.0010 to 0.040%, Se: 0 to 0.040%, sol. Al: 0.010 to 0.040%; and N: 0.004 to 0.020% to 1300° C. or higher; subsequently performing hot rolling, hot-band annealing as necessary, cold rolling, and primary recrystallization annealing which also serves as decarburization annealing; applying an annealing separator on the surface of the steel sheet; and performing finishing annealing, edge cracks that may occur in the hot rolling are effectively prevented by keeping a slab lateral face temperature at a time of starting rough rolling during the hot rolling equal to or lower than a temperature Te defined by the following Expression Te=−120000 [% S]2+1400 (1) and carrying out width reduction after at least one pass in the rough rolling.
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9.发明授权公开(公告)号：US11577291B2
公开(公告)日：2023-02-14
申请号：US16342015
申请日：2017-10-18
IPC分类号： B21B45/08 , C21D6/00 , C22C38/40 , C22C38/34 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/00 , C21D9/46 , C21D8/12 , C22C38/60 , C22C38/02 , C21D8/00
摘要： With a hot-rolled steel sheet for electrical steel sheet production having a scale layer on the surface, where the surface of the steel sheet has a lightness L* as defined in JIS Z 8781-4: 2013 satisfying 30≤L*≤50, and chromaticities a* and b* as defined in JIS Z 8781-4: 2013 satisfying −1≤a*≤2 and −5≤b*≤3 respectively, and with one end portion in the longitudinal direction of a coil as a reference, a color difference ΔEab* as defined in JIS Z 8781-4: 2013 at the central portion and at the opposite end portion satisfies ΔEab*≤8, it is possible to obtain a grain-oriented electrical steel sheet where the variation of properties in a product coil is small.
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公开(公告)号：US11459633B2
公开(公告)日：2022-10-04
申请号：US16957461
申请日：2018-12-27
发明人： Masanori Takenaka , Makoto Watanabe , Yuiko Ehashi
IPC分类号： C21D9/46 , C21D1/34 , C21D6/00 , C21D8/00 , C21D8/12 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/32 , C22C38/34 , C22C38/48 , C22C38/50 , C22C38/60 , H01F1/147
摘要： In a production of a grain-oriented electrical steel sheet by subjecting a steel slab containing a particular composition and further including an inhibitor-forming ingredient to hot rolling, hot-band annealing, cold rolling, primary recrystallization annealing combined with decarburization annealing and finish annealing, the steel slab satisfies a given relation between a content ratio of sol. Al to N and a final sheet thickness, and, in the finish annealing, the steel sheet is kept at a temperature zone of higher than 850° C. but not higher than 950° C. in heating process for 5 to 200 hours, heated to a temperature zone of 950 to 1050° C. at 5 to 30° C./hr and further subjected to purification treatment of keeping a temperature of not lower than 1100° C. for not less than 2 hours to provide a secondary recrystallization structure that has an average value of a diameter equivalent to a circle of 10 to 100 mm.
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