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公开(公告)号：US20240249863A1
公开(公告)日：2024-07-25
申请号：US18561412
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 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/34 , C22C38/60
CPC分类号： H01F1/14791 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , 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 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/34 , C22C38/60 , C22C2202/02
摘要： To provide a grain-oriented electrical steel sheet with good processing accuracy in rounding while maintaining excellent magnetic properties, and a producing method thereof. Disclosed is the method including: subjecting a steel material to heating to 1300° C. or higher and hot rolling, subjecting the resulting sheet directly, or after subjection to hot-rolled sheet annealing, to at least two cycles of cold rolling with intermediate annealing therebetween, decarburization annealing, application of an annealing separator to a surface of the sheet, final annealing, in which maximum arrival temperatures in the first and second cycles of the cold rolling satisfy a predetermined relation, total rolling reductions in the first and second cycles of the cold rolling satisfy a predetermined relation, and in the final annealing, an average heating rates in temperature ranges from 50° C. to 1000° C. and from 1000° C. to (maximum arrival temperature—50° C.) satisfy a predetermined relation.
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公开(公告)号：US20230250503A1
公开(公告)日：2023-08-10
申请号：US18003343
申请日：2021-06-28
CPC分类号： C21D8/1222 , C21D8/1233 , C21D8/1266 , C21D8/1272 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/08 , C21D2201/05
摘要： Provided is a method of manufacturing a grain-oriented electrical steel sheet that has a uniform texture all along the longitudinal direction and has small fluctuations in magnetic properties. The method includes subjecting a predetermined hot-rolled and annealed sheet to cold rolling, where at least one time of cold rolling has a total rolling reduction of 80 % or more and is performed by a tandem mill, rolling performed in at least one stand of the tandem mill is performed under conditions of a rolling reduction of 30 % or more and a biting temperature To °C of a work roll of the stand, and a temperature at which either or both of a leading end and a tail end of the hot-rolled and annealed sheet are bitten by the work roll is 70° C. or higher and at least 10° C. higher than the temperature To °C.
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公开(公告)号：US20160196909A1
公开(公告)日：2016-07-07
申请号：US14915708
申请日：2014-09-25
IPC分类号： H01F1/16 , C22C38/46 , C22C38/44 , C22C38/34 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/00 , C21D9/46 , C21D8/02 , C21D6/00 , C21D1/34 , C23C8/26 , C22C38/60
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.
摘要翻译： 提供一种通过对具有规定成分的钢板进行加热来制造晶粒取向电工钢板的方法，然后对板坯进行热轧，得到热轧板，然后任意地对热轧板进行热带退火和随后的冷轧 在其间进行中间退火，轧制一次或两次以上，得到具有最终板厚的冷轧板，然后对冷轧板进行一次再结晶退火和随后的二次再结晶退火，其中钢板的老化指数AI 最终冷轧设定为70MPa以下，有效地生长Goss取向晶粒，从而获得具有良好磁特性的晶粒取向电工钢板，不受含有相对大量C的限制。
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4.发明申请公开(公告)号：US20150354051A1
公开(公告)日：2015-12-10
申请号：US14761419
申请日：2014-02-18
发明人： Hiroshi MATSUDA , Hideyuki TAKAHASHI , Hiroi YAMAGUCHI , Yasuyuki HAYAKAWA , Yukihiro SHINGAKI , Takashi TERASHIMA
CPC分类号： C21D8/1255 , C21D8/12 , C21D8/1272 , C21D9/0006 , C21D9/46 , C23C8/02 , C23C8/26 , C23C8/38 , C23C8/80 , H01F1/16 , H01F41/02 , H01J37/32018 , H01J37/3277
摘要： Provided is an apparatus for nitriding a grain-oriented electrical steel sheet which is very useful in obtaining excellent magnetic properties with no variation, that enables generating glow discharge between positive electrodes and negative electrodes disposed in a nitriding zone and irradiating the generated plasma to a strip to perform appropriate nitriding.
摘要翻译： 本发明提供一种氮化方向性电磁钢板的装置，其在获得优异的磁特性而无变化的情况下非常有用，能够在设置在渗氮区域的正极和负极之间产生辉光放电，并将产生的等离子体照射到带材 进行适当的氮化处理。
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公开(公告)号：US20230243009A1
公开(公告)日：2023-08-03
申请号：US18003499
申请日：2021-06-28
发明人： Yukihiro SHINGAKI , Yusuke SHIMOYAMA , Ayaka SERA
CPC分类号： C21D8/1222 , C22C38/04 , C21D1/34 , C21D8/1272 , C22C38/02 , C22C38/08 , C21D8/1233 , C21D8/1266 , C21D2201/05
摘要： Provided is a production method for a grain-oriented electrical steel sheet with which stable magnetic properties are obtained in the same coil. The method comprises: hot rolling a steel slab having a predetermined chemical composition, followed by annealing to obtain a hot-rolled and annealed sheet; cold rolling the hot-rolled and annealed sheet one time, or two times or more with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet, followed by subjecting to primary and secondary recrystallization annealing, wherein in the cold rolling, a rolling reduction ratio is 80% or more at least one time out of the one time or two times or more, and a steel sheet temperature T0 (° C.) while a rolling rate is a set value R0 (mpm) and a steel sheet temperature T1 (° C.) while the rolling rate is less than or equal to 0.5×R0 (mpm) satisfy a formula (1).
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公开(公告)号：US20220186338A1
公开(公告)日：2022-06-16
申请号：US17603239
申请日：2020-01-17
摘要： A method for producing a non-oriented electrical steel sheet used as an iron core material for a motor or transformer and having excellent magnetic properties including subjecting a raw steel material including, by mass %, C: not more than 0.005%, Si: 1.0 to 5.0%, Mn: 0.04 to 3.0%, sol. Al: not more than 0.005%, P: not more than 0.2%, S: not more than 0.005%, N: not more than 0.005% and the remainder being Fe and impurities forming a hot-rolled sheet, subjecting the hot-rolled sheet to hot-band annealing and a single or two or more cold rollings including an intermediate annealing between each rolling forming a cold-rolled sheet having a final sheet thickness and subjecting the cold-rolled sheet to a finish annealing, wherein at least one pass in the final cold rolling at a friction coefficient μ of not less than 0.030 and a rolling reduction of not less than 15%.
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7.发明申请公开(公告)号：US20150318092A1
公开(公告)日：2015-11-05
申请号：US14650073
申请日：2013-12-25
IPC分类号： H01F1/147 , C21D6/00 , C23C8/02 , C23C8/80 , H01F41/02 , C22C38/00 , C22C38/60 , C22C38/06 , C22C38/04 , H01F1/16 , C21D8/12 , C22C38/02
CPC分类号： H01F1/14775 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D8/1294 , C21D2211/004 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60 , C23C8/02 , C23C8/26 , C23C8/50 , C23C8/80 , H01F1/16 , H01F41/02
摘要： A method for producing a grain-oriented electrical steel sheets includes subjecting a steel slab to hot rolling to obtain a hot rolled sheet, the steel slab having a specific composition; then subjecting the hot rolled sheet to annealing and rolling to obtain a cold rolled sheet; then subjecting the cold rolled sheet to nitriding treatment with a nitrogen increase of 50 to 1000 ppm, during or after primary recrystallization annealing; then applying an annealing separator on the cold rolled sheet; and setting the staying time in a temperature range of 300 to 800° C. in the secondary recrystallization annealing to 5 to 150 hours.
摘要翻译： 晶粒取向电工钢板的制造方法包括对钢坯进行热轧，得到热轧板，具有特定组成的钢坯; 然后对热轧板进行退火和轧制以获得冷轧板; 然后在一次再结晶退火过程中或之后使冷轧板进行氮化处理50〜1000ppm的氮化处理。 然后在冷轧板上涂布退火分离剂; 并在二次再结晶退火中将停留时间设定在300〜800℃的温度范围内至5〜150小时。
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8.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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9.发明公开公开(公告)号：US20240052448A1
公开(公告)日：2024-02-15
申请号：US18260473
申请日：2022-01-26
CPC分类号： C21D8/1272 , C21D8/1233 , C21D8/1222 , C22C38/04 , C22C38/02 , C21D9/46 , C21D2201/05
摘要： Provided is a method of manufacturing a grain-oriented electrical steel sheet, with which a grain-oriented electrical steel sheet with low iron loss and little variation in iron loss can be stably manufactured by a tandem mill. The method includes subjecting a steel material to hot rolling to obtain a hot-rolled sheet, subjecting the hot-rolled sheet to cold rolling once or twice or more with intermediate annealing performed therebetween to obtain a cold-rolled sheet with a final sheet thickness, and then subjecting the cold-rolled sheet to decarburization annealing and then to secondary recrystallization annealing, wherein final cold rolling is performed by a tandem mill, and in the final cold rolling, the hot-rolled sheet is heated to a temperature range of 70° C. or higher and 200° C. or lower, then cooled to 60° C. or lower, and then introduced into a first pass of the tandem mill.
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公开(公告)号：US20210115549A1
公开(公告)日：2021-04-22
申请号：US17124493
申请日：2020-12-17
发明人： Yukihiro SHINGAKI , Hirotaka INOUE
IPC分类号： C23C8/26 , C21D9/46 , C23C8/02 , C22C38/60 , H01F1/16 , C22C38/00 , C21D8/12 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/28 , C22C38/34 , C23F17/00
摘要： A nitriding apparatus for manufacturing a grain-oriented electrical steel sheet is provided. The nitriding apparatus includes: a nitriding gas supply pipe for introducing gas including at least ammonia or nitrogen; and a nitriding treatment portion for successively performing high-temperature nitriding and low-temperature nitriding in nitriding treatment. The nitriding treatment portion includes a high-temperature treatment portion for performing the high-temperature nitriding and a low-temperature treatment portion for performing the low-temperature nitriding, and the nitriding gas supply pipe to the high-temperature treatment portion includes a cooling device.
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