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公开(公告)号：EP3888808A1
公开(公告)日：2021-10-06
申请号：EP19890895.6
申请日：2019-11-25
摘要： To stably improve the magnetic flux density by utilizing induction heating and radiant heating during final annealing of a non-oriented electrical steel sheet. A method of manufacturing a non-oriented electrical steel sheet, including subjecting a slab having a predetermined chemical composition to hot rolling with or without performing hot-rolled sheet annealing, and then to cold rolling either once, or twice or more with intermediate annealing performed therebetween, and then to final annealing, where a material before final cold rolling has a recrystallization ratio of less than 80 % and a {100} intensity of 8 or less in a 1/4 layer, and in the final annealing, an average heating rate from 600 °C to 720 °C is 50 °C/s or higher, and an average heating rate from 720 °C to 760 °C is 5 °C/s or higher.
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公开(公告)号：EP2963131A1
公开(公告)日：2016-01-06
申请号：EP14756232.6
申请日：2014-02-24
CPC分类号： H01F1/14775 , C21D1/26 , C21D3/04 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/34 , C22C38/40 , C22C38/60 , H01F1/16 , H01F41/02
摘要： In a method for producing a grain-oriented electrical steel sheet by hot rolling a raw steel material containing C: 0.002∼0.10 mass%, Si: 2.0∼8.0 mass% and Mn: 0.005∼1.0 mass% to obtain a hot rolled sheet, subjecting the hot rolled sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, when rapid heating is performed at a rate of not less than 50°C/s in a range of 100∼700°C in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250∼600°C for 0.5∼10 seconds 2 to 6 times to thereby obtain a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value.
摘要翻译： 在通过对含有C：0.002〜0.10质量％，Si：2.0〜8.0质量％，Mn：0.005〜1.0质量％的原料钢材进行热轧而制造方向性电磁钢板的方法中， 根据需要对热轧板进行热轧带钢退火，并进一步进行一次冷轧或包括其间的中间退火的两次或多次冷轧，以获得具有最终板厚的冷轧板，对该冷轧板进行一次再结晶 在100℃〜700℃的范围内以50℃/ s以上的速度进行快速加热的情况下，对钢板表面实施退火分离剂后，实施最终退火， 在一次再结晶退火的加热过程中，钢板在250〜600℃的任意温度下进行2〜6次的保持处理0.5〜10秒，得到晶粒取向电工钢 l片材铁损低，铁损值偏差小。
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公开(公告)号：EP3564399A1
公开(公告)日：2019-11-06
申请号：EP17887685.0
申请日：2017-12-12
发明人： OKUBO Tomoyuki , UESAKA Masanori , ODA Yoshihiko
摘要： A non-oriented electrical steel sheet which has a chemical composition comprising C: not more than 0.0050 mass%, Si: 1.0-5.0 mass%, Mn: 0.03-3.0 mass%, P: not more than 0.2 mass%, S: not more than 0.005 mass%, Al: not more than 0.05 mass%, N: not more than 0.0050 mass%, O: not more than 0.010 mass%, Ti: not more than 0.0030 mass%, Nb: not more than 0.0030 mass%, B: 0.0005-0.0050 mass% and the remainder being Fe and inevitable impurities, and is excellent in not only the recyclability but also the iron loss property after stress-relief annealing.
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公开(公告)号：EP3546609A1
公开(公告)日：2019-10-02
申请号：EP17873044.6
申请日：2017-11-15
摘要： Disclosed is a non-oriented electrical steel sheet low in iron loss that is substantially free of Al and contains large amounts of Si and Mn. The disclosed non-oriented electrical steel sheet has a chemical composition containing C: 0.0050 % or less, Si: 2.0 % to 6.0 %, Mn: 1.0 % to 3.0 %, P: 0.20 % or less, S: 0.0050 % or less, N: 0.0050 % or less, and Al: 0.0050 % or less, with the balance being Fe and inevitable impurities, in which Si-Mn nitrides having an average diameter of 50 nm to 500 nm has a number density of 1/µm 3 or less.
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公开(公告)号：EP3533890A1
公开(公告)日：2019-09-04
申请号：EP17863904.3
申请日：2017-08-30
摘要： Iron loss is reduced by increasing magnetic flux density. Disclosed is a non-oriented electrical steel sheet has a chemical composition containing, by mass%, C: 0.0050 % or less, Si: 1.50 % or more and 4.00 % or less, Al: 0.500 % or less, Mn: 0.10 % or more and 5.00 % or less, S: 0.0200 % or less, P: 0.200 % or less, N: 0.0050 % or less, O: 0.0200 % or less, and Ca: 0.0010 % or more and 0.0050 % or less, with the balance being Fe and inevitable impurities, in which the non-oriented electrical steel sheet has an Ar 3 transformation temperature of 700 °C or higher, a grain size of 80 µm or more and 200 µm or less, and a Vickers hardness of 140 HV or more and 230 HV or less.
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公开(公告)号：EP3404124A1
公开(公告)日：2018-11-21
申请号：EP17738513.5
申请日：2017-01-13
发明人： UESAKA Masanori , NAKANISHI Tadashi , NABESHIMA Seiji , OKUBO Tomoyuki , ODA Yoshihiko , NAKAJIMA Hiroaki
IPC分类号： C22C38/00 , C21C7/04 , C21D8/12 , C22C38/06 , C22C38/60 , H01F1/147 , C21C7/064 , C21C7/068 , C22C38/02 , C22C38/04
CPC分类号： C22C38/60 , C21C7/064 , C21C7/068 , C21D8/12 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C22C38/00 , C22C38/002 , C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , H01F1/147 , Y02P10/216
摘要： A steel prepared to contain C: not more than 0.0050%, Si: 0.1-5.0%, Mn: 0.02-3.0%, sol. Al: not more than 0.0050%, P: not more than 0.2%, S: not more than 0.0050%, N: not more than 0.0040%, T. Ca: 0.0010-0.0080%, T. O: not more than 0.0100% and having (T. Ca/T. O) of not less than 0.50 but not more than 2.0 by decarburizing to a C content of not more than 0.0050%, adding Si, decreasing Al as much as possible, and adding Ca is melted to form a slab. The slab is subjected to a hot rolling at a coiling temperature of not lower than 550°C, a cold rolling and a finish annealing, or the slab is subjected to a hot rolling, a hot band annealing at a temperature of 900-1150°C, a cold rolling and a finish annealing to thereby produce a non-oriented electrical steel sheet having a low Al content, an excellent recycling property and excellent magnetic properties.
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7.发明公开LOW-CORE-LOSS GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME 审中-公开低损耗晶粒取向的电磁钢板及其制造方法
公开(公告)号：EP3205738A1
公开(公告)日：2017-08-16
申请号：EP15848835.3
申请日：2015-10-05
CPC分类号： C21D9/46 , C21D8/005 , C21D8/1261 , C21D8/1272 , C21D8/1288 , C21D8/1294 , C21D2201/05 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/16 , C22C38/54 , C22C38/60 , H01F1/14775
摘要： In the manufacture of a grain oriented electrical steel sheet by subjecting an Si-containing steel slab to hot rolling, cold rolling, primary recrystallization annealing, finish annealing and formation of a tension coating, the sheet is subjected to a temperature holding treatment at a temperature T within a range of 250-600°C for 1-10 seconds in a heating process of the primary recrystallization annealing and then heated from the temperature T to 700°C at a rate of not less than 80°C/s and from 700°C to a soaking temperature at a rate of not more than 15°C/s, wherein an oxygen potential from 700°C to the soaking temperature is 0.2-0.4 and an oxygen potential during the soaking is 0.3-0.5 and an area ratio of secondary recrystallized grains is not less than 90% when an angle α deviated from {110} ideal orientation is less than 6.5° and an area ratio is not less than 75% when a deviation angle P is less than 2.5° and an average length [L] in the rolling direction is not more than 20 mm and an average value [β] of the angle P (°) is 15.63 x [β] + [L]
摘要翻译： 在通过对含Si钢坯进行热轧，冷轧，一次再结晶退火，最终退火和形成拉伸涂层来制造取向性电磁钢板时，将该钢板在一定温度下进行保温处理 T在250〜600℃的范围内进行1〜10秒钟的热处理，然后以80℃/秒以上的温度从温度T升温至700℃，从700℃ ℃至均热温度以不超过15℃/ s的速率进行，其中700℃至均热温度的氧势为0.2-0.4，并且在均热过程中氧势为0.3-0.5，面积比 当偏离角P小于2.5°时，当从{110} <001>理想取向偏离的角度α小于6.5°并且面积比率不小于75％时，二次再结晶晶粒的尺寸不小于90％，并且 轧制方向的平均长度[L]不是mo 大于20mm，并且角度P（°）的平均值[β]为15.63×[β] + [L] <44.06，由此获得具有良好铁损性能的取向性电磁钢板。
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公开(公告)号：EP3798328A1
公开(公告)日：2021-03-31
申请号：EP19808416.2
申请日：2019-05-20
IPC分类号： C22C38/00 , C21D8/12 , C22C38/12 , C22C38/60 , H01F1/147 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06
摘要： Provided is a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising a chemical composition containing C: 0.0050 % or less, Si: 2.0 % or more and 6.0 % or less, Mn: 1.0 % or more and 3.0 % or less, P: 0.20 % or less, S: 0.0050 % or less, N: 0.0050 % or less, Al: 0.0050 % or less, and one or more selected from B: 0.0001 % or more and 0.0050 % or less, Nb: 0.0001 % or more and 0.0050 % or less, and V: 0.0005 % or more and 0.0500 % or less, with a balance consisting of Fe and inevitable impurities, wherein a number density of Si-Mn nitrides with an average diameter of 50 nm or more and 500 nm or less is 1 or less per µm 3 .
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公开(公告)号：EP3564399B1
公开(公告)日：2020-12-02
申请号：EP17887685.0
申请日：2017-12-12
发明人： OKUBO Tomoyuki , UESAKA Masanori , ODA Yoshihiko
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公开(公告)号：EP3633059A1
公开(公告)日：2020-04-08
申请号：EP18810011.9
申请日：2018-05-08
摘要： When a non-oriented electrical steel sheet is produced by hot rolling a steel slab containing, by mass%, C: not more than 0.0050, Si: 3.2 to 4.5%, Mn: 0.1 to 2.0%, P: not more than 0.020%, As: not more than 0.0030%, Sn+Sb: 0.005 to 0.10%, and one or two elements selected from Mo and W by a content ranging from 0.0020 to 0.10% in total, optionally conducting hot band annealing, subjecting the resultant steel sheet to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to achieve a final sheet thickness, and then subjecting the cold rolled sheet to finish annealing, a N 2 content in an atmosphere in the finish annealing is set to not more than 20 vol%, and preferably, rolling reduction in a first pass of rough rolling of the hot rolling is set to not more than 25%, and an average strain rate in the first pass is set to not more than 4 /sec, which allows the cold rolling property to improve with no degradation in the magnetic property and no decrease in the productivity.
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