公开(公告)号：US09617616B2

公开(公告)日：2017-04-11

申请号：US14415089

申请日：2013-07-25

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi Imamura ,  Yukihiro Shingaki ,  Makoto Watanabe ,  Ryuichi Suehiro ,  Toshito Takamiya

IPC: C21D9/46 ,  C21D8/12 ,  C22C38/00 ,  C22C38/60 ,  H01F1/16 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/40 ,  C21D6/00 ,  C22C38/34 ,  H01F1/147

CPC classification number: C21D9/46 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/34 ,  C22C38/40 ,  C22C38/60 ,  H01F1/14775 ,  H01F1/16

Abstract: In a method for producing a grain-oriented electrical steel sheet by comprising a series of steps of 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 steel sheet after or without hot band annealing to one stage cold rolling or two or more stage cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to decarburization annealing combined with primary recrystallization 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 200-700° C. of the decarburization annealing, the cold rolled sheet is subjected to holding at any temperature of 250-600° C. for 1-10 seconds thereof to thereby produce a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value.

公开(公告)号：US09536658B2

公开(公告)日：2017-01-03

申请号：US13814065

申请日：2011-08-03

Applicant: Takeshi Omura ,  Hiroi Yamaguchi ,  Seiji Okabe

Inventor： Takeshi Omura ,  Hiroi Yamaguchi ,  Seiji Okabe

IPC: H01F41/00 ,  C21D8/12 ,  H01F1/18 ,  C22C38/00 ,  C22C38/04 ,  C22C38/08 ,  B21B3/02

CPC classification number: H01F41/00 ,  B21B3/02 ,  C21D8/1272 ,  C21D8/1288 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/008 ,  C22C38/04 ,  C22C38/08 ,  H01F1/18

Abstract: A grain oriented electrical steel sheet that is subjected to magnetic domain refining treatment by electron beam irradiation and exhibits excellent low-noise properties when assembled as an actual transformer in which tension exerted on the steel sheet by the forsterite film is 2.0 MPa or higher both in a rolling direction and a direction transverse (perpendicular) to the rolling direction, and a ratio of an irradiation pitch in a thermal strain introduced region (B) to a spot diameter (A) on an electron beam irradiation surface satisfies 0.5≦B/A≦5.0.

Abstract translation: 通过电子束照射进行磁畴精制处理的晶粒取向电工钢板，组装成实施变压器时，具有优异的低噪声特性，其中通过镁橄榄石膜施加在钢板上的张力为2.0MPa以上 轧制方向和与轧制方向横向（垂直）的方向，并且热应变引入区域（B）中的照射间距与电子束照射表面上的光斑直径（A）的比率满足0.5≤B/ A ≤5.0。

公开(公告)号：US20160247613A1

公开(公告)日：2016-08-25

申请号：US15027368

申请日：2014-10-20

Applicant: NORTHEASTERN UNIVERSITY

Inventor： Guodong WANG ,  Yuanxiang ZHANG ,  Yang WANG ,  Xiang LU ,  Feng FANG ,  Guangming CAO ,  Chenggang LI ,  Guo YUAN ,  Yunbo XU ,  Zhenyu LIU ,  Zhaodong WANG

IPC: H01F1/147 ,  C22C38/06 ,  C22C38/04 ,  B22D11/041 ,  C22C38/00 ,  C21D9/52 ,  C21D8/04 ,  B22D11/00 ,  C22C38/12 ,  C22C38/02

CPC classification number: H01F1/14766 ,  B22D11/001 ,  B22D11/041 ,  B22D11/0622 ,  B22D11/1206 ,  C21D8/0405 ,  C21D8/0415 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D8/0473 ,  C21D8/0478 ,  C21D8/12 ,  C21D8/1205 ,  C21D8/1211 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1277 ,  C21D9/52 ,  C21D2201/05 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

Abstract: The preparation method includes steps of (1) melting steel according to in weight percentage 0.001-0.003% of C, 5.0-6.6% of Si, 0.2-0.3% of Mn, 0.05-0.12% of Al, 0.01-0.04% of V, 0.03-0.06% of Nb, 0.02-0.03% of S, 0.009-0.020% of N, O which is less than or equal to 0.0020%, and the balance being Fe and unavoidable impurities; (2) forming cast strips after a thin-strip casting course; (3) hot-rolling the cast strips under inert atmosphere conditions; (4) cooling the hot-rolled cast strips to 550-600 DEG C, coiling and performing low-temperature hot rolling/warm rolling on the coiled cast strips under a nitrogen atmosphere condition; (5) removing oxidized scales though pickling, performing cold rolling multiple times; (6) performing recrystallization annealing, coating with an MgO layer, and coiling; (7) performing purification annealing under hydrogen circulation conditions; and (8) removing oxidized scales, coating with an insulating layer, performing flat stretch annealing, and air-cooled coiling.

Abstract translation: 该制备方法包括以下步骤：（1）将重量百分比分别为C，0.001-0.003％的C，5.0-6.6％的Si，0.2-0.3％的Mn，0.05-0.12％的Al，0.01-0.04％的V ，0.03-0.06％的Nb，0.02-0.03％的S，0.009-0.020％的N，O，小于或等于0.0020％，余量为Fe和不可避免的杂质; （2）在薄带铸造过程之后形成铸造带; （3）在惰性气氛条件下对铸造带进行热轧; （4）将热轧铸造带冷却至550〜600℃，在氮气氛下对卷取的铸造带进行卷取和低温热轧/热轧; （5）通过酸洗除去氧化鳞片，进行多次冷轧; （6）进行再结晶退火，用MgO层进行涂布和卷取; （7）在氢循环条件下进行纯化退火; 和（8）去除氧化鳞片，用绝缘层涂覆，进行平面拉伸退火和空气冷却卷取。

公开(公告)号：US20160230245A1

公开(公告)日：2016-08-11

申请号：US15133848

申请日：2016-04-20

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Yoshihiro SUWA ,  Kazuaki NAKANO ,  Kunio HAYASHI ,  Riki OKAMOTO ,  Nobuhiro FUJITA ,  Kohichi SANO

IPC: C21D9/46 ,  C23C2/28 ,  C23C2/36 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  B32B15/01 ,  C23C2/06

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D2201/05 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C23C2/06 ,  C23C2/285 ,  C23C2/36 ,  Y10T428/12799

Abstract: This high-strength cold-rolled steel sheet contains, in mass %, C: 0.02% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001% to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; in which Si+Al is limited to less than 1.0%, and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of ⅝ to ⅜ in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100} to {223} orientation group is 4.0 or less, and a pole density of the {332} crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 7 μm or less.

Abstract translation: 该高强度冷轧钢板以质量％计含有C：0.02〜0.20％ Si：0.001〜2.5％ Mn：0.01〜4.0％ P：0.001〜0.15％ S：0.0005〜0.03％; Al：0.001〜2.0％ N：0.0005〜0.01％; 和O：0.0005％至0.01％; 其中Si + Al被限制在小于1.0％，余量由铁和不可避免的杂质构成，其中，贝氏体在金属结构体中的面积比为95％以上，在板厚中心部分为范围 从钢板表面的⅝至⅜的厚度，{100} <011>至{223} <110>取向基团的极点密度的平均值为4.0以下，极点密度为{ 332} <113>晶体取向为5.0以下，金属结构体的晶粒的平均体积直径为7μm以下。

公开(公告)号：US09382596B2

公开(公告)日：2016-07-05

申请号：US13235070

申请日：2011-09-16

Applicant: Raju Pillai ,  Jiinjen A. Sue ,  Parul W. Dhall

Inventor： Raju Pillai ,  Jiinjen A. Sue ,  Parul W. Dhall

IPC: C21D6/00 ,  C21D9/00 ,  C22C38/18 ,  C22C38/22 ,  E21B10/46 ,  B23K35/30 ,  C21D1/09 ,  C21D1/38 ,  B23K26/34 ,  C22C38/02 ,  C22C38/24 ,  C22C33/02 ,  B23K35/02 ,  B23K26/32

CPC classification number: C21D6/00 ,  B23K26/32 ,  B23K26/34 ,  B23K35/0244 ,  B23K35/308 ,  B23K2103/50 ,  C21D1/09 ,  C21D1/38 ,  C21D6/002 ,  C21D9/00 ,  C21D2201/05 ,  C21D2211/001 ,  C21D2211/008 ,  C22C33/0257 ,  C22C38/02 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  E21B10/46

Abstract: A hardfacing composition composed of an Fe—Cr alloy. The alloy is comprised of 80 wt % iron, about 2 wt % to about 20 wt % Cr, less than 1 wt % Si and less than 1 wt % C. The alloy's microstructure is at least 80 vol % martensite; and less than 20 vol % austenite.

Abstract translation: 由Fe-Cr合金构成的表面硬化组合物。 该合金由80重量％的铁，约2重量％至约20重量％的Cr，小于1重量％的Si和小于1重量％的C组成。该合金的显微组织为至少80体积％的马氏体; 和小于20体积％的奥氏体。

公开(公告)号：US20150267273A1

公开(公告)日：2015-09-24

申请号：US14439112

申请日：2013-10-29

Applicant: JFE STEEL CORPORATION

Inventor： Shigehiro Takajo ,  Masanori Uesaka ,  Kazuhiro Hanazawa

IPC: C21D1/34 ,  C21D9/46 ,  H01F41/04 ,  H01F1/16

CPC classification number: C21D1/34 ,  C21D8/12 ,  C21D8/1244 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F41/04

Abstract: According to the present invention, when irradiating the surface of a grain-oriented electrical steel sheet having a sheet thickness t with an electron beam in a direction intersecting a rolling direction, the irradiation energy E(t) of the electron beam is adjusted to satisfy Ewmin(0.23)×(1.61−2.83×t (mm))≦E(t)≦Ewmin(0.23)×(1.78−3.12×t (mm)) (Expression (1)) using the value of the irradiation energy Ewmin(0.23) that minimizes iron loss for material with a sheet thickness of 0.23 mm. The present invention thus allows for a grain-oriented electrical steel sheet with high productivity that can suppress a reduction in productivity caused by optical system adjustment operations or by shortening of line spacing.

Abstract translation: 根据本发明，在与轧制方向交叉的方向上用电子束照射具有片材厚度t的方向性电磁钢板的表面，调整电子束的照射能量E（t）以满足 使用照射值的Ewmin（0.23）×（1.61-2.83×t（mm））＆nlE; E（t）＆nlE; Ewmin（0.23）×（1.78-3.12×t（mm））（式（1） 能量Ewmin（0.23），最小化0.23毫米厚度的材料的铁损。 因此，本发明允许具有高生产率的方向性电磁钢板，其可以抑制由光学系统调整操作引起的生产率的降低或通过缩短线间距。

公开(公告)号：US20150248957A1

公开(公告)日：2015-09-03

申请号：US14367273

申请日：2012-12-28

Applicant: JFE Steel Corporation

Inventor： Shigehiro Takajo ,  Seiji Okabe ,  Hirotaka Inoue ,  Michiro Komatsubara

IPC: H01F1/147 ,  H01F41/02 ,  C22C38/02 ,  H01F1/16 ,  C21D6/00 ,  C21D1/34

CPC classification number: H01F1/14775 ,  B23K15/0006 ,  B23K26/0006 ,  B23K26/0622 ,  B23K26/082 ,  B23K26/352 ,  B23K26/354 ,  B23K2101/18 ,  B23K2101/36 ,  B23K2103/04 ,  B23K2103/50 ,  C21D6/008 ,  C21D8/1294 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/002 ,  C22C38/004 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18 ,  C22C38/34 ,  C22C38/60 ,  H01F1/16 ,  H01F41/02

Abstract: A grain-oriented electrical steel sheet exhibits reduced iron loss and reduced noise. The electrical steel sheet has magnetic domains refined by regions with a high lattice defect density being locally formed on the surface of or within the steel sheet, in which the regions with a high lattice defect density has a hardness, as measured by a micro Vickers hardness meter, equal to or lower than that of other regions.

Abstract translation: 晶粒取向电工钢板表现出铁损减少和噪音降低。 电磁钢板具有通过在钢板表面或钢板内局部形成的具有高晶格缺陷密度的区域精炼的磁畴，其中具有高晶格缺陷密度的区域具有通过微维氏硬度测量的硬度 米，等于或低于其他地区。

公开(公告)号：US08936687B2

公开(公告)日：2015-01-20

申请号：US13576010

申请日：2011-03-09

Applicant: Kenichi Sadahiro

Inventor： Kenichi Sadahiro

IPC: C21D8/00 ,  C21D8/12 ,  B21B3/02 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/60 ,  H01F1/16

CPC classification number: C21D8/1222 ,  B21B3/02 ,  C21D6/008 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C21D2201/05 ,  C22C38/001 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/60 ,  H01F1/16

Abstract: In a method for manufacturing grain oriented electrical steel sheets from a slab, controlling the steel sheet temperature so as to satisfy T (t)

Abstract translation: 在从板坯制造晶粒取向电工钢板的方法中，控制钢板温度以满足T（t）

公开(公告)号：US20140366988A1

公开(公告)日：2014-12-18

申请号：US14345012

申请日：2012-09-17

Applicant: voestalpine Stahl GmbH

Inventor： Franz Dorninger ,  Roman Sonnleitner ,  Herbert Kreuzer

IPC: H01F1/147 ,  H02K1/22 ,  H02K1/12 ,  C21D8/12 ,  H01B5/02

CPC classification number: H01F1/14791 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01B5/02 ,  H01F1/15308 ,  H02K1/02 ,  H02K1/12 ,  H02K1/22

Abstract: A method for producing a higher-strength, non-grain-oriented electrical strip, according to which a slab is cast from a molten mass, the slab is hot-rolled and then cold-rolled—optionally a hot-strip annealing can be carried out between the hot-rolling and the cold-rolling —and the cold strip is annealed in order to produce a partially recrystallized structure so that the mechanical strength values ReH can be set within the range of 450 MPa to 850 MPa at an annealing temperature of between 600° C. and 800° C. for 60 s to 300 s.

Abstract translation: 一种用于制造高强度非晶粒取向电条的方法，根据该方法从熔融物质铸造板坯，将板坯热轧，然后冷轧，任选地可以承载热带退火 在冷轧和冷轧之间进行退火，并且冷带退火以产生部分再结晶的结构，使得机械强度值ReH可以在450MPa至850MPa的范围内设定在退火温度 在600℃至800℃之间，为60秒至300秒。

公开(公告)号：US20140352849A1

公开(公告)日：2014-12-04

申请号：US14368806

申请日：2012-12-27

Applicant: JFE STEEL CORPORATION

Inventor： Ryuichi Suehiro ,  Hiroi Yamaguchi ,  Seiji Okabe ,  Hirotaka Inoue ,  Shigehiro Takajo

IPC: H01F1/16 ,  C21D8/12

CPC classification number: H01F1/16 ,  C21D1/38 ,  C21D8/12 ,  C21D8/1277 ,  C21D8/1294 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60

Abstract: The present invention proposes a method that can reduce the noise generated by a transformer core and the like when formed by laminations of a grain-oriented electrical steel sheet in which core loss has been reduced by a magnetic domain refinement process. In this steel sheet, linear distortion extending with an orientation in which an angle formed with a direction perpendicular to the rolling direction of the steel sheet is an angle of 30° or less is periodic in the direction of rolling of the steel sheet, core loss (W17/50) is 0.720 W/kg or less, and magnetic flux density (B8) is 1.930 T. The volume of the closure domain arising in the distortion part is 1.00-3.00% of the total magnetic domain volume within the steel sheet.

Abstract translation: 本发明提出一种能够降低由变形铁芯等产生的噪声的方法，当通过磁畴精制工艺降低铁损的方向性电磁钢板的叠层形成时，产生的噪声。 在该钢板中，以与钢板的轧制方向成直角的方向成为角度为30°以下的取向延伸的线状变形在钢板的轧制方向上是周期性的，铁损 （W17 / 50）为0.720W / kg以下，磁通密度（B8）为1.930T。变形部中产生的封闭畴的体积为钢板内的总磁畴体积的1.00-3.00％ 。