公开(公告)号：EP2107130A1

公开(公告)日：2009-10-07

申请号：EP09159921.7

申请日：2001-08-07

申请人： Nippon Steel Corporation

发明人： USHIGAMI, Yoshiyuki ,  NAKAMURA, Shuichi ,  MURAKAMI, Kenichi ,  FUJII, Hiroyasu ,  YAMAMOTO, Norihiro

IPC分类号： C21D8/12 ,  C22C38/02 ,  C22C38/18 ,  C23C8/02 ,  C23C8/26

CPC分类号： C23C8/02 ,  C21D1/76 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D2201/05 ,  C22C38/008 ,  C22C38/02 ,  C22C38/18 ,  C23C8/26 ,  Y02P10/212

摘要： The present invention, in a method to produce a grain-oriented electrical steel sheet, proposes conditions for stable production by clarifying the causes by which secondary recrystallization is rendered unstable when primary recrystallization is controlled by raising the heating rate of decarburization annealing.
The primary recrystallization structure is controlled by changing the heating rate and the oxide layer of a steel sheet is controlled by changing the conditions of soaking annealing in the decarburization annealing. The composition of the (Al, Si)N inhibitor is also controlled in the nitriding treatment thereafter.

摘要翻译： 本发明在制造方向性电磁钢板的方法中，通过澄清通过提高脱碳退火的加热速度来控制一次再结晶时，通过澄清二次再结晶不稳定的原因，提出了稳定生产的条件。 通过改变加热速率来控制一次再结晶结构，通过改变脱碳退火中的浸渍退火条件来控制钢板的氧化物层。 此后，氮化处理也控制（Al，Si）N抑制剂的组成。

公开(公告)号：EP4032996A1

公开(公告)日：2022-07-27

申请号：EP20866466.4

申请日：2020-09-17

申请人： NIPPON STEEL CORPORATION

发明人： YASUDA, Masato ,  ARITA, Yoshihiro ,  KATAOKA, Takashi ,  MURAKAMI, Kenichi ,  ARAMAKI, Takeo ,  YANO, Shinya

IPC分类号： C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  H01F1/147

摘要： (Problem) The purpose of the present invention is to provide a method for manufacturing a grain-oriented electrical steel sheet, whereby it becomes possible to manufacture a grain-oriented electrical steel sheet having further improved iron loss properties stably. (Solution) According to one aspect of the present invention, a method for manufacturing a grain-oriented electrical steel sheet is provided, the method being characterized by comprising a re-heating step, a hot rolling step, a hot-rolled sheet annealing step, a cold rolling step, a decarburization annealing step and a final annealing step, wherein the decarburization annealing step includes a heating step of heating a cold-rolled sheet from an inlet side temperature T0°C to a soaking temperature T2°C and a soaking step of keeping the temperature of the cold-rolled sheet at the soaking temperature T2°C, and the heating rate HR1 from the time point when the temperature of the cold-rolled sheet is an inlet side temperature T0°C to the time point when the temperature of the cold-rolled sheet reaches a attained temperature T1°C is 40°C/sec or more and the heating rate HR2 from the time point when the temperature of the cold-rolled sheet is the desired temperature T1°C to the time point when the temperature of the cold-rolled sheet reaches the soaking temperature T2°C is more than 15°C/sec to 30°C/sec in the heating step in the decarburization annealing step.

公开(公告)号：EP3696288A3

公开(公告)日：2020-09-09

申请号：EP20157330.0

申请日：2010-03-19

申请人： Nippon Steel Corporation

发明人： MORISHIGE, Nobusato ,  MURAKAMI, Kenichi ,  HONMA, Hotaka ,  KUBO, Yuji ,  MIZUKAMI, Kazumi ,  TANAKA, Koki ,  TAKEBAYASHI, Seiki

IPC分类号： C21D8/12 ,  B21B3/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/60 ,  H01F1/16 ,  H01F27/25 ,  C22C1/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  H01F41/02

摘要： The present invention relates to a grain oriented electrical steel sheet for a wound core consisting of Si: 2.5 mass% to 4.5 mass%, and a balance of Fe and inevitable impurities, wherein-an average value of a shape ratio represented by "(a length in a rolling direction)/(a length in a width direction)" of a crystal grain is 2 or more,an average value of the lengths in the rolling direction of the crystal grains is 100 mm or more, and a value of a magnetic flux density when a magnetic field of 800 A/m is supplied at a frequency of 50 Hz is 1.94 T or more.

公开(公告)号：EP2270469B1

公开(公告)日：2020-06-03

申请号：EP09733952.7

申请日：2009-04-23

申请人： Nippon Steel Corporation

发明人： MIZUKAMI, Kazumi ,  MURAKAMI, Kenichi ,  ARAI, Satoshi ,  MORISHIGE, Nobusato ,  KUBO, Yuji ,  HONMA, Hotaka ,  NANBA, Eiichi

IPC分类号： G01N15/02 ,  G01N33/20 ,  G01N30/00 ,  G01N21/47

公开(公告)号：EP2537947A1

公开(公告)日：2012-12-26

申请号：EP11744742.5

申请日：2011-02-18

申请人： Nippon Steel Corporation

发明人： MURAKAMI, Kenichi ,  USHIGAMI, Yoshiyuki

IPC分类号： C21D8/12 ,  C22C38/00 ,  C22C38/16 ,  C22C38/34 ,  H01F1/16

CPC分类号： C21D9/46 ,  C21D3/04 ,  C21D8/12 ,  C21D8/1255 ,  C21D8/1272 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C23C8/02 ,  C23C8/80 ,  H01F1/16

摘要： Hot rolling is performed on a steel with a predetermined composition containing Ti: 0.0020 mass% to 0.010 mass% and/or Cu: 0.010 mass% to 0.50 mass% to obtain a hot-rolled steel sheet. Annealing is performed on the hot-rolled steel sheet to obtain an annealed steel sheet. Cold rolling is performed on the annealed steel sheet to obtain a cold-rolled steel sheet. Decarburization annealing is performed on the cold-rolled steel sheet at a temperature of 800°C to 950°C to obtain a decarburization annealed steel sheet. Then, nitridation treatment is performed on the decarburization annealed steel sheet at 700°C to 850°C to obtain a nitrided steel sheet. Finish annealing is performed on the nitrided steel sheet.

摘要翻译： 在含有Ti：0.0020质量％至0.010质量％和/或Cu：0.010质量％至0.50质量％的预定组成的钢上进行热轧，得到热轧钢板。 在热轧钢板上进行退火，得到退火钢板。 对退火后的钢板进行冷轧，得到冷轧钢板。 在冷轧钢板上，在800〜950℃的温度下进行脱碳退火，得到脱碳退火钢板。 然后，在脱碳退火钢板上，在700℃〜850℃进行氮化处理，得到氮化钢板。 在氮化钢板上进行完成退火。

公开(公告)号：EP2412831A1

公开(公告)日：2012-02-01

申请号：EP10756014.6

申请日：2010-03-19

申请人： Nippon Steel Corporation

发明人： MORISHIGE, Nobusato ,  MURAKAMI, Kenichi ,  HONMA, Hotaka ,  KUBO, Yuji ,  MIZUKAMI, Kazumi ,  TANAKA, Koki ,  TAKEBAYASHI, Seiki

IPC分类号： C21D8/12 ,  B21B3/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/60 ,  H01F1/16 ,  H01F27/25

CPC分类号： C21D8/1222 ,  B21B3/02 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1272 ,  C21D2201/05 ,  C22C1/002 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/60 ,  H01F1/16 ,  H01F41/0233

摘要： A slab having a predetermined composition is heated to 1280°C or more. The slab is hot-rolled to obtain a hot-rolled steel sheet. The hot-rolled steel sheet is annealed to obtain an annealed steel sheet. The annealed steel sheet is cold-rolled to obtain a cold-rolled steel sheet. The cold-rolled steel sheet is decarburization annealed to obtain a decarburization annealed steel sheet. The decarburization annealed steel sheet is coiled in a coil state. The coil-state decarburization annealed steel sheet is finish-annealed. The cold-rolled steel sheet is heated to a temperature of 800°C or more at a rate of 30°C/sec or more and 100°C/sec or less during increasing temperature of the cold-rolled steel sheet in the decarburization annealing or before the decarburization annealing. The decarburization annealed steel sheet is heated at a rate of 20°C/h or less within a temperature range of 750°C or more and 1150°C or less during increasing temperature of the decarburization annealed steel sheet in the finish annealing.

公开(公告)号：EP2270469A1

公开(公告)日：2011-01-05

申请号：EP09733952.7

申请日：2009-04-23

申请人： Nippon Steel Corporation

发明人： MIZUKAMI, Kazumi ,  MURAKAMI, Kenichi ,  ARAI, Satoshi ,  MORISHIGE, Nobusato ,  KUBO, Yuji ,  HONMA, Hotaka ,  NANBA, Eiichi

IPC分类号： G01N15/02

CPC分类号： G01N15/0205 ,  G01N30/0005 ,  G01N33/20 ,  G01N2021/4704

摘要： A method according to the present invention has: isolating, by extraction, particles contained in a metal material to be analyzed in a solution using a particle isolator; dispersing the particles isolated by extraction into a solvent to prepare a dispersion, and fractionating the dispersion into a plurality of particle dispersions based on particle sizes, using a field flow fractionator; and irradiating laser light on each of the particle dispersions separated based on predetermined particle sizes, to thereby measure absolute values of the particle size based on angular dependence of reflection intensity, and also to thereby measure the number density based on magnitude of reflection intensity.

摘要翻译： 根据本发明的方法具有：通过提取使用颗粒隔离器在溶液中分离包含在待分析的金属材料中的颗粒; 将通过萃取分离的颗粒分散到溶剂中以制备分散体，并使用场流分馏器将分散体分馏成基于粒径的多个颗粒分散体; 并且将激光照射到基于预定粒径分离的每个颗粒分散体上，从而基于反射强度的角度依赖性测量粒度的绝对值，并且由此基于反射强度的大小来测量数量密度。

公开(公告)号：EP2039792A1

公开(公告)日：2009-03-25

申请号：EP07743247.4

申请日：2007-05-07

申请人： Nippon Steel Corporation

发明人： USHIGAMI, Yoshiyuki ,  FUJII, Norikazu ,  MURAKAMI, Kenichi ,  MORISHIGE, Nobusato

IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/60 ,  H01F1/16

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

摘要： Grain-oriented electrical steel sheet superior in core loss characteristic containing Si: 0.8 to 7 mass% and having a secondary recrystallized texture with a {110} orientation as the main orientation, characterized in that average deviation angles α, β, and γ from the {110} ideal orientation of the secondary recrystallized texture satisfy (α 2 +β 2 ) 1/2 ≤γ, where α: average deviation angle from {110} ideal orientation around rolling surface normal direction (ND) of secondary recrystallized texture, β: average deviation angle from {110} ideal orientation around traverse direction (TD) of secondary recrystallized texture, and γ: average deviation angle from {110} ideal orientation around rolling direction (RD) of secondary recrystallized texture.

摘要翻译： 含有Si的磁芯损耗特性优异的晶粒取向电工钢板：0.8〜7质量％，具有{110} <001>取向的二次再结晶织构作为主要取向，其特征在于，平均偏差角度±， 来自{110} <001>的二次再结晶织构的理想取向的³满足（±2 +²2）1/2‰³，其中±：平均偏离角{110} <001>围绕滚动面正常的理想方向 二次再结晶组织的方向（ND）：²：二次再结晶组织的横向方向（TD）周围的{110} <001>理想取向的平均偏离角，以及³：平均偏离角与{110} <001>理想方位 二次再结晶织构的轧制方向（RD）。

公开(公告)号：EP4032994A1

公开(公告)日：2022-07-27

申请号：EP20864727.1

申请日：2020-09-17

申请人： NIPPON STEEL CORPORATION

发明人： YASUDA, Masato ,  ARAMAKI, Takeo ,  YANO, Shinya ,  ARITA, Yoshihiro ,  KATAOKA, Takashi ,  MURAKAMI, Kenichi

IPC分类号： C21D8/12 ,  C22C38/00 ,  C22C38/06 ,  C22C38/60 ,  H01F1/147

摘要： [Problem] To provide a grain-oriented electrical steel sheet which is further improved in terms of iron loss before magnetic domain control, while achieving a sufficient iron loss improvement effect even in the control of a heat-resistant magnetic domain where a sufficient iron loss improvement effect has not been achieved. [Solution] A grain-oriented electrical steel sheet according to one aspect of the present invention comprises a base steel sheet and a glass coating that is formed on the surface of the base steel sheet, and is characterized in that: the base steel sheet contains as chemical components, in mass%, 0.010% or less of C, from 2.00% to 4.00% of Si, from 0.05% to 1.00% of Mn, from 0.010% to 0.065% of Al, 0.004% or less of N and 0.010% or less of S, with the balance being made up of Fe and impurities; the oxygen concentration in the glass coating and the base steel sheet is 2,500 ppm or less; and if I Al_1 is the first peak intensity of Al and I Al_2 is the second peak intensity of Al in the concentration profile of Al, the relationship of mathematical formula (1) is satisfied. Formula (1): I Al_1 Al_2

公开(公告)号：EP2537946B1

公开(公告)日：2019-08-07

申请号：EP11744741.7

申请日：2011-02-18

申请人： Nippon Steel Corporation

发明人： MURAKAMI, Kenichi ,  USHIGAMI, Yoshiyuki

IPC分类号： C22C33/04 ,  C22C38/14 ,  C21D3/04 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/16 ,  C22C38/34 ,  C23C8/02 ,  C23C8/80 ,  H01F1/16 ,  C22C38/06