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公开(公告)号：US20240327942A1
公开(公告)日：2024-10-03
申请号：US18735904
申请日：2024-06-06
IPC分类号： C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C21D8/1222 , C21D8/1205 , C21D8/1233 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48 , C21D2201/05
摘要： In a method of producing a grain-oriented electrical steel sheet comprising subjecting a steel slab containing no inhibitor-forming components to hot rolling, cold rolling, primary recrystallization annealing working also as decarburization and to final annealing causing secondary recrystallization after applying an annealing separator on the surface, the final cold rolling for cold rolling the steel sheet to the final thickness uses a warm rolling with a tandem rolling mill at a total rolling reduction of not less than 80% at 150 to 280° C. and is performed by extending a pass line length of the steel sheet between the stands so that T satisfies T≥1.3×L/V, where an distance between the stands is defined as L (m), a speed of the steel sheet passing between the stands is defined as V (mpm), and a pass time during which the steel sheet passes between the stands is defined as T (min).
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公开(公告)号：US20150170813A1
公开(公告)日：2015-06-18
申请号：US14415027
申请日：2013-07-25
IPC分类号： H01F1/147 , B21H7/00 , B21B45/00 , C21D8/12 , C21D9/46 , C21D6/00 , C22C38/34 , C22C38/60 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , H01F41/02 , B21B1/02
CPC分类号： H01F1/14775 , B21B1/026 , B21B45/004 , B21H7/00 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/12 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D9/46 , C21D2201/05 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/34 , C22C38/60 , H01F1/14791 , H01F1/16 , H01F41/02
摘要： In a method of producing a grain-oriented electrical steel sheet by hot rolling a steel slab having a chemical composition including C: 0.001˜0.10 mass %, Si: 1.0˜5.0 mass %, Mn: 0.01˜0.5 mass %, S and/or Se: 0.01˜0.05 mass %, sol. Al: 0.003˜0.050 mass % and N: 0.0010˜0.020 mass %, subjecting to single cold rolling or two or more cold rollings including an intermediate annealing therebetween to a final thickness, performing primary recrystallization annealing, and thereafter applying an annealing separator to perform final annealing, a temperature range of 550° C. to 700° C. in a heating process of the primary recrystallization annealing is rapidly heated at an average heating rate of 40˜200° C./s, while any temperature zone of from 250° C. to 550° C. is kept at a heating rate of not more than 10° C./s for 1˜10 seconds, whereby the refining of secondary recrystallized grains is attained and grain-oriented electrical steel sheets are stably obtained with a low iron loss.
摘要翻译： 在通过热轧具有C：0.001〜0.10质量％，Si：1.0〜5.0质量％，Mn：0.01〜0.5质量％的化学组成的钢板的方法中，S和/ 或Se：0.01〜0.05质量％，sol。 Al：0.003〜0.050质量％，N：0.0010〜0.2020质量％，进行一次再结晶退火，进行一次再结晶退火，然后进行一次再结晶退火，然后进行退火分离，进行一次冷轧或两次以上的冷轧， 最终退火时，在一次再结晶退火的加热过程中550℃至700℃的温度范围以40-200℃/ s的平均加热速率快速加热，而任何温度区域为250 以不超过10℃/秒的加热速率保持1〜10秒钟，由此可以获得二次再结晶晶粒的精制，并且可以稳定地获得晶粒取向电工钢板 低铁损。
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公开(公告)号：US11732348B2
公开(公告)日：2023-08-22
申请号：US16979938
申请日：2019-03-20
发明人： Takumi Umada , Yukihiro Shingaki
CPC分类号： C23C14/542 , C23C14/32 , C23C14/56
摘要： Provided is a surface treatment facility in which both surfaces of a material are subjected to continuous film deposition by PVD as the material is conveyed in the longitudinal direction, wherein flutter of the material subjected to coating can be suppressed. This surface treatment facility comprises a chamber configured to continuously deposit a film by PVD on both surfaces of a material as the material is conveyed in the longitudinal direction through the chamber; a conveyance mechanism for conveying the material subjected to coating; a blowing mechanism for blowing film-forming gas in the longitudinal direction on both sides of the material present in the chamber; and has an X/Y ratio within a range of 0.4 to 3.0 where X is the film-forming gas blowing speed, and Y is the conveyance speed of the material subjected to coating, and where the unit of measurement of X and Y is m/min.
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公开(公告)号：US20210087690A1
公开(公告)日：2021-03-25
申请号：US16979291
申请日：2019-03-25
发明人： Yukihiro Shingaki , Takumi Umada
摘要： Provided is a method for producing a grain-oriented electrical steel sheet with which it is possible to obtain a grain-oriented electrical steel sheet exhibiting excellent magnetic properties. This method for prod producing a grain-oriented electrical steel sheet involves subjecting a surface of a grain-oriented electrical steel sheet which does not have a forsterite film thereon to a film formation treatment, and performing the film formation treatment while imparting tension to the grain-oriented electrical steel sheet which does not have a forsterite film thereon.
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公开(公告)号：US10214793B2
公开(公告)日：2019-02-26
申请号：US14764650
申请日：2014-02-18
发明人： Hiroshi Matsuda , Hideyuki Takahashi , Hiroi Yamaguchi , Yukihiro Shingaki , Yasuyuki Hayakawa , Takashi Terashima
摘要： Provided is a method for nitriding a grain-oriented electrical steel sheet which is very useful in obtaining excellent magnetic properties with no variation by immersing a strip in a molten salt bath after cold rolling and before secondary recrystallization annealing during a production process of a grain-oriented electrical steel sheet, to subject the strip to continuous nitriding to uniformly disperse inhibitor forming elements over the full length and full width of the strip.
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公开(公告)号：US09805851B2
公开(公告)日：2017-10-31
申请号：US14352904
申请日：2012-10-16
IPC分类号： H01F1/147 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C21D8/02 , C21D8/12 , C21D9/46 , H01F1/16 , C22C38/00 , C22C38/08 , C23C22/33 , C23C22/74
CPC分类号： H01F1/14775 , C21D8/0263 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D9/46 , C22C38/001 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/60 , C23C22/33 , C23C22/74 , H01F1/16
摘要： In a method of producing a grain-oriented electrical steel sheet by hot rolling a steel slab comprising C: 0.001˜0.10 mass %, Si: 1.0˜5.0 mass %, Mn: 0.01˜1.0 mass %, one or two of S and Se: 0.01˜0.05 mass % in total, sol. Al: 0.003˜0.050 mass % and N: 0.001˜0.020 mass %, cold rolling, subjecting to primary recrystallization annealing, applying an annealing separator and finally subjecting to final annealing, the primary recrystallization annealing is conducted so as to control a heating rate S1 between 500 and 600° C. to not less than 100° C./s and a heating rate S2 between 600 and 700° C. to not less than 30° C./s but not more than 0.6×S1, and as a main ingredient of the annealing separator is used MgO having an expected value μ(A) of citric acid activity distribution of 3.5˜3.8, a cumulative frequency F of 25˜45% when an activity A is not less than 4.0.
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公开(公告)号：US09748029B2
公开(公告)日：2017-08-29
申请号：US14415027
申请日：2013-07-25
IPC分类号： C22C38/04 , H01F1/147 , C21D8/12 , C22C38/00 , C22C38/60 , H01F1/16 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/18 , B21B1/02 , B21B45/00 , B21H7/00 , C21D6/00 , C21D9/46 , C22C38/34 , H01F41/02
CPC分类号： H01F1/14775 , B21B1/026 , B21B45/004 , B21H7/00 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/12 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D9/46 , C21D2201/05 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/34 , C22C38/60 , H01F1/14791 , H01F1/16 , H01F41/02
摘要： In a method of producing a grain-oriented electrical steel sheet by hot rolling a steel slab having a chemical composition comprising C: 0.001 to 0.10 mass %, Si: 1.0 to 5.0 mass %, Mn: 0.01 to 0.5 mass %, S and/or Se: 0.005 to 0.040 mass %, sol. Al: 0.003˜0.050 mass % and N: 0.0010 to 0.020 mass %, subjecting to single cold rolling or two or more cold rollings including an intermediate annealing therebetween to a final thickness, performing primary recrystallization annealing, and thereafter applying an annealing separator to perform final annealing, a temperature range of 550° C. to 700° C. in a heating process of the primary recrystallization annealing is rapidly heated at an average heating rate of 40 to 200° C./s, while any temperature zone of from 250° C. to 550° C. is kept at a heating rate of not more than 10° C./s for 1 to 10 seconds, whereby the refining of secondary recrystallized grains is attained and grain-oriented electrical steel sheets are stably obtained with a low iron loss.
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公开(公告)号：US12037654B2
公开(公告)日：2024-07-16
申请号：US17279194
申请日：2019-09-26
IPC分类号： C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C21D8/1222 , C21D8/1205 , C21D8/1233 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/48 , C21D2201/05
摘要： In a method of producing a grain-oriented electrical steel sheet comprising subjecting a steel slab containing no inhibitor-forming components to hot rolling, cold rolling, primary recrystallization annealing working also as decarburization and to final annealing causing secondary recrystallization after applying an annealing separator on the surface, the final cold rolling for cold rolling the steel sheet to the final thickness uses a warm rolling with a tandem rolling mill at a total rolling reduction of not less than 80% at 150 to 280° C. and is performed by extending a pass line length of the steel sheet between the stands so that T satisfies T≥1.3×L/V, where an distance between the stands is defined as L(m), a speed of the steel sheet passing between the stands is defined as V (mpm), and a pass time during which the steel sheet passes between the stands is defined as T(min).
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公开(公告)号：US11761074B2
公开(公告)日：2023-09-19
申请号：US17124493
申请日：2020-12-17
发明人： Yukihiro Shingaki , Hirotaka Inoue
IPC分类号： F27D7/02 , 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 , F27B9/04 , F27D7/06
CPC分类号： C23C8/26 , C21D8/12 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C21D8/1277 , C21D9/46 , C22C38/00 , C22C38/002 , C22C38/008 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/28 , C22C38/34 , C22C38/60 , C23C8/02 , C23F17/00 , H01F1/16 , F27B9/045 , F27D7/02 , F27D7/06
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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公开(公告)号：US20220033921A1
公开(公告)日：2022-02-03
申请号：US17279194
申请日：2019-09-26
IPC分类号： C21D8/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/48 , C22C38/42 , C22C38/44
摘要： In a method of producing a grain-oriented electrical steel sheet comprising subjecting a steel slab containing no inhibitor-forming components to hot rolling, cold rolling, primary recrystallization annealing working also as decarburization and to final annealing causing secondary recrystallization after applying an annealing separator on the surface, the final cold rolling for cold rolling the steel sheet to the final thickness uses a warm rolling with a tandem rolling mill at a total rolling reduction of not less than 80% at 150 to 280° C. and is performed by extending a pass line length of the steel sheet between the stands so that T satisfies T≥1.3×L/V, where an distance between the stands is defined as L(m), a speed of the steel sheet passing between the stands is defined as V (mpm), and a pass time during which the steel sheet passes between the stands is defined as T(min).
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