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公开(公告)号：US20230307160A1
公开(公告)日：2023-09-28
申请号：US18040813
申请日：2021-08-26
IPC分类号： H01F1/147 , C21D8/12 , C21D6/00 , C22C38/60 , C22C38/12 , C22C38/06 , C22C38/02 , C22C38/00 , C22C38/04
CPC分类号： H01F1/147 , C21D8/1244 , C21D6/008 , C22C38/60 , C22C38/12 , C22C38/06 , C22C38/02 , C22C38/002 , C22C38/04 , C22C38/001 , C22C2202/02
摘要： Provided is a method for manufacturing a grain-oriented electrical steel sheet to reduce iron loss by controlling the magnetic domain structure, in which the iron loss reduction effect can be maintained even when stress relief annealing is applied, and the magnetic flux density does not decrease after the magnetic domain control treatment. In the manufacturing method, on a surface of the grain oriented electrical steel sheet, a laser beam with a ring-shaped intensity distribution in which the intensity in a periphery is lower than that in a center is irradiated in a linear manner in a direction intersecting a rolling direction of the steel sheet.
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公开(公告)号：US20240133003A1
公开(公告)日：2024-04-25
申请号：US18547692
申请日：2022-03-02
发明人： Shigehiro TAKAJO , Hiroi YAMAGUCHI
CPC分类号： C22C38/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/60
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 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：US20190323100A1
公开(公告)日：2019-10-24
申请号：US16344441
申请日：2017-11-01
IPC分类号： C21D9/46 , C21D8/12 , C21D6/00 , C21D1/42 , C22C38/60 , C22C38/48 , C22C38/46 , C22C38/16 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , H01F1/147
摘要： Excellent magnetic properties can be stably obtained in grain-oriented electrical steel sheets produced from thin slabs without using inhibitor forming components. Provided is a method for producing a grain-oriented electrical steel sheet comprising: subjecting a molten steel to continuous casting to form a slab with 25 to 100 mm in thickness, the molten steel having a chemical composition containing, in mass %, C: 0.002 to 0.100%, Si: 2.00 to 8.00%, Mn: 0.005 to 1.000%, Al:
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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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5.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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6.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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7.发明申请公开(公告)号：US20220195553A1
公开(公告)日：2022-06-23
申请号：US17593560
申请日：2020-03-26
IPC分类号： C21D9/46 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147 , H01F41/02
摘要： Provided is a method of producing a grain-oriented electrical steel sheet having uniform and good coating properties and magnetic properties throughout the length and/or width of the steel sheet. The method comprises: subjecting a steel slab to hot rolling, to cold rolling once or twice or more with intermediate annealing therebetween, and to primary recrystallization annealing; applying a liquid or slurry annealing separator to a resultant steel sheet; and thereafter coiling the steel sheet and subjecting the steel sheet to final annealing, wherein, before, after, or simultaneously with the application of the annealing separator, an additive for changing a composition of the annealing separator is adhered to the steel sheet at a weight ratio of 15% or less to a total of the annealing separator and the additive so as to vary the composition of the annealing separator in a longitudinal direction and/or width direction of the steel sheet.
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8.发明申请公开(公告)号：US20150361544A1
公开(公告)日：2015-12-17
申请号：US14761707
申请日：2014-02-18
发明人： Hiroshi MATSUDA , Hideyuki TAKAHASHI , Hiroi YAMAGUCHI , Yasuyuki HAYAKAWA , Takashi TERASHIMA , Yuiko WAKISAKA
CPC分类号： C23C8/38 , C21D1/09 , C21D1/773 , C21D8/12 , C21D8/1255 , C21D9/46 , C21D2201/05 , C22C38/02 , C23C8/02 , C23C8/26 , H01F1/14775 , H01F1/16
摘要： Provided is an apparatus for continuously nitriding a strip continuously being fed after cold rolling and before secondary recrystallization annealing in a production line of a grain-oriented electrical steel sheet, comprising: a nitriding zone for nitriding the strip; a cooling zone for cooling the strip; and an optional heating zone provided upstream of the nitriding zone for heating the strip, wherein, the nitriding zone is provided with glow discharge electrodes, and by plasma nitriding the strip by glow discharge with the glow discharge electrodes functioning as positive electrodes and the strip functioning as a negative electrode, inhibitor forming elements are uniformly dispersed over the full length and full width of the strip and a grain-oriented electrical steel sheet with excellent magnetic properties with no variation is obtained.
摘要翻译： 本发明提供一种用于在冷轧后连续进料的条带和在取向电工钢板的生产线中的二次再结晶退火之前连续氮化的装置，包括：氮化氮化带， 用于冷却带材的冷却区域; 以及可选的加热区，设置在氮化区的上游，用于加热带，其中，氮化区设置有辉光放电电极，并且通过辉光放电等离子体氮化该带，其中辉光放电电极用作正电极，并且带的功能 作为负极，抑制剂形成元件在条带的全长和全宽度上均匀分散，并且获得了具有优异的磁性能而没有变化的晶粒取向电工钢板。
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公开(公告)号：US20240240293A1
公开(公告)日：2024-07-18
申请号：US18561841
申请日：2022-05-27
CPC分类号： C22C38/02 , C21D1/26 , C21D3/04 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1272 , C21D8/1283 , C22C38/04 , C23G1/08 , C21D2201/05
摘要： To provide a method for producing a grain-oriented electrical steel sheet that can solve the problem of cracking in steel sheets during final cold rolling and that can stably produce a grain-oriented electrical steel sheet with low iron loss. A production method includes predetermined steps, wherein the conditions: T≤−4000×A+440, and T≤360 are satisfied, where A denotes an average C content in mass % in a predetermined region of the steel sheet after subjection to annealing preceding final cold rolling and before subjection to the final cold rolling, and T denotes a time in hours from just after the completion of the annealing preceding the final cold rolling to just before the start of the final cold rolling, and after the final cold rolling and before the decarburization annealing, pickling treatment is performed with a predetermined treatment solution.
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10.发明公开公开(公告)号：US20240229199A9
公开(公告)日：2024-07-11
申请号：US18547692
申请日：2022-03-02
发明人： Shigehiro TAKAJO , Hiroi YAMAGUCHI
CPC分类号： C22C38/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C22C38/001 , C22C38/04 , C22C38/06 , C22C38/60
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 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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