公开(公告)号：US20160319390A1

公开(公告)日：2016-11-03

申请号：US15208720

申请日：2016-07-13

Applicant: JFE STEEL CORPORATION

Inventor： Takeshi IMAMURA ,  Yukihiro SHINGAKI ,  Makoto WATANABE ,  Ryuichi SUEHIRO ,  Toshito TAKAMIYA

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

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 including 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.

Abstract translation: 在通过以下步骤的制造方向，其特征在于，包括将C：0.002〜0.10质量％，Si：2.0〜8.0质量％，Mn：0.005〜1.0质量％的粗钢材热轧的工序， 得到热轧板，在热轧带钢退火后进行一次冷轧，或者对其进行中间退火的两台以上的阶段冷轧，得到最终板厚的冷轧板，对冷轧 轧制板与脱碳退火结合一次再结晶退火，在钢板表面上涂布退火分离剂，然后进行最终退火。

公开(公告)号：US20160260531A1

公开(公告)日：2016-09-08

申请号：US15028841

申请日：2014-10-23

Applicant: JFE STEEL CORPORATION

Inventor： Takashi TERASHIMA ,  Makoto WATANABE ,  Masanori UESAKA ,  Ryuichi SUEHIRO ,  Toshito TAKAMIYA

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

CPC classification number: H01F1/14783 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0289 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1244 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/16 ,  C22C38/60 ,  C23C22/33 ,  C23C22/74 ,  H01F1/18

Abstract: There is provided a grain-oriented electrical steel sheet stably having excellent magnetic characteristics and coating adhesion even when a rapid heating is conducted in a primary recrystallization annealing (decarburization annealing). Concretely, it is a grain-oriented electrical steel sheet provided on its sheet surface with a tension-applying type insulation coating constituted with a coating layer A formed on a steel sheet side and mainly composed of an oxide and a coating layer B formed on a surface side and mainly composed of glass, characterized in that a ratio R (σB/σA) of a tension σB of the coating layer B on the surface side applied to the steel sheet to a tension σA of the coating layer on the steel sheet side A applied to the steel sheet is within a range of 1.20-4.0.

Abstract translation: 即使在一次再结晶退火（脱碳退火）中进行快速加热，也提供了稳定地具有优异的磁特性和涂层粘附性的晶粒取向电工钢板。 具体地说，它是一种在其表面上设置有张力施加型绝缘涂层的晶粒取向电工钢板，其由在钢板侧形成的主要由氧化物和涂层B形成的涂层B构成， 表面侧，主要由玻璃构成，其特征在于，涂布在钢板表面侧的涂层B的张力σB与钢板侧的涂层的张力σA的比率R（σB/σA） 应用于钢板的A在1.20〜4.0的范围内。

公开(公告)号：US20240254600A1

公开(公告)日：2024-08-01

申请号：US18546780

申请日：2022-03-15

Applicant: JFE STEEL CORPORATION

Inventor： Makoto WATANABE ,  Takuya YAMADA

IPC: C22C38/02 ,  C21D3/04 ,  C21D6/00 ,  C21D8/12 ,  C22C38/04

CPC classification number: C22C38/02 ,  C21D3/04 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/04

Abstract: Proposed is a way to improve film adhesion when magnetic domain refining treatment is performed. The Mn+Fe concentration in the ceramic base film of a grain-oriented electrical steel sheet is 0.05 mass % or more, and the Young's modulus of the base film is 108 GPa to 144 GPa.

公开(公告)号：US20240247333A1

公开(公告)日：2024-07-25

申请号：US18264928

申请日：2022-03-03

Applicant: JFE STEEL CORPORATION

Inventor： Makoto WATANABE ,  Takashi TERASHIMA ,  Takuya YAMADA

IPC: C21D11/00 ,  C21D1/26 ,  C21D3/04 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04

CPC classification number: C21D11/00 ,  C21D1/26 ,  C21D3/04 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04

Abstract: In determining the conditions for final annealing, information on the concentration of enriched components over the entire length and width of the steel sheet after decarburization annealing is obtained, the optimum function of product properties in the relationship between enriched components and control conditions for final annealing is obtained in advance, and the distribution of the control conditions for final annealing within the coil were considered while determining the control conditions for final annealing such that the area where the deviation of the product properties from the above optimum function is within a range of ±δ is maximized over the entire length and width.

公开(公告)号：US20240026482A1

公开(公告)日：2024-01-25

申请号：US18258327

申请日：2022-01-20

Applicant: JFE STEEL CORPORATION

Inventor： Takuya YAMADA ,  Makoto WATANABE ,  Takashi TERASHIMA

IPC: C21D9/46 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C22C38/14 ,  C21D8/12 ,  C21D6/00

CPC classification number: C21D9/46 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/001 ,  C22C38/14 ,  C22C38/002 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1266 ,  C21D6/008 ,  C21D6/005 ,  C22C2202/02 ,  C21D2201/05

Abstract: Provided is a method for stably producing a grain-oriented electrical steel sheet with excellent magnetic properties by effectively purifying inhibitors. The method for producing a grain-oriented electrical steel sheet includes using a steel slab containing a predetermined amount of at least one of Ti, Zr, Hf, V, Nb, and Ta, and applying an annealing separator, in which 1 part by mass to 10 parts by mass of a metal compound is added with respect to 100 parts by mass of MgO, on the steel sheet surface with a ratio of particles with a particle size of 1 μm or more in the metal compound being 0.0010 particles/μm2 or less.

公开(公告)号：US20220170130A1

公开(公告)日：2022-06-02

申请号：US17593860

申请日：2020-03-27

Applicant: JFE STEEL CORPORATION

Inventor： Makoto WATANABE ,  Masanori TAKENAKA ,  Takashi TERASHIMA

IPC: C21D9/46 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  H01F1/147 ,  H01F41/02

Abstract: Provided is a grain-oriented electrical steel sheet having a film that is effective for the magnetic properties of the steel sheet and particularly effective for iron loss reduction and has favorable adhesion. In a grain-oriented electrical steel sheet, an insulating film partially enters into a steel substrate to form an anchor part, a depth of the anchor part from the surface of the steel substrate is 3.5 μm or less, and a number of neck parts of 5 μm2 or less in area is 0.06/μm2 or less and a number of neck parts of 10 μm2 to 40 μm2 in area is 0.005/μm2 or more and 0.011/μm2 or less, where each neck part is a remaining part of the insulating film on the surface of the steel substrate when peeling the insulating film from the steel substrate in a bend test for the grain-oriented electrical steel sheet.

公开(公告)号：US20210317319A1

公开(公告)日：2021-10-14

申请号：US17264129

申请日：2019-06-19

Applicant: JFE STEEL CORPORATION

Inventor： Takashi TERASHIMA ,  Karin KOKUFU ,  Makoto WATANABE ,  Toshito TAKAMIYA

IPC: C09D1/00 ,  C23C26/00 ,  B05D1/28 ,  B05D3/02 ,  B05D7/14 ,  H01F1/147

Abstract: An insulating coating treatment liquid for forming a chromium-free insulating coating on a surface of a grain-oriented electrical steel sheet, the insulating coating treatment liquid including at least one phosphate salt selected from phosphate salts of any of Mg, Ca, Ba, Sr, Zn, Al, and Mn and including colloidal silica and particles of a metal-element-containing compound. A content of the colloidal silica in terms of SiO2, on a solids basis, is 50 to 120 parts by mass, and a content of the particles of a metal-element-containing compound in terms of elemental metal is 5 to 60 parts by mass, per 100 parts by mass of the at least one phosphate salt, and the insulating coating treatment liquid has a thixotropic index (TI) of 1.00 or greater and 10.00 or less.

公开(公告)号：US20170088915A1

公开(公告)日：2017-03-30

申请号：US15310904

申请日：2015-05-11

Applicant: JFE STEEL CORPORATION

Inventor： Ryuichi SUEHIRO ,  Takashi TERASHIMA ,  Makoto WATANABE ,  Toshito TAKAMIYA ,  Takeshi IMAMURA

IPC: C21D9/46 ,  C21D3/04 ,  C22C38/60 ,  C22C38/34 ,  C22C38/32 ,  C22C38/16 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H01F41/02 ,  H01F1/03 ,  C21D8/12

CPC classification number: C21D9/46 ,  C21D3/04 ,  C21D8/12 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1266 ,  C21D8/1272 ,  C21D8/1283 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/32 ,  C22C38/34 ,  C22C38/60 ,  H01F1/0306 ,  H01F1/16 ,  H01F41/0233

Abstract: A method for producing a grain-oriented electrical steel sheet by subjecting a slab of an inhibitor-less ingredient system containing C: 0.002-0.10 mass %, Si: 2.5-6.0 mass %, Mn: 0.010-0.8 mass % and extremely decreased Al, N, Se and S to hot rolling, hot band annealing, cold rolling, decarburization annealing, application of an annealing separator and finish annealing, when a certain temperature within range of 700-800° C. in a heating process of decarburization annealing is T1 and a certain temperature as a soaking temperature within a range of 820-900° C. is T2, a heating rate R1 between 500° C. and T1 is set to not less than 100° C./s and heating rate R2 between T1 and T2 is set to not more than 15° C./s, whereby grain-oriented electrical steel sheet having excellent iron loss property and coating peeling resistance is obtained in the inhibitor-less ingredient system while ensuring decarburization property even when rapid heating is performed during decarburization annealing.

公开(公告)号：US20160305026A1

公开(公告)日：2016-10-20

申请号：US15038501

申请日：2015-01-14

Applicant: JFE STEEL CORPORATION

Inventor： Takashi TERASHIMA ,  Makoto WATANABE ,  Masanori UESAKA ,  Ryuichi SUEHIRO ,  Toshito TAKAMIYA

IPC: C23C22/12 ,  C21D9/46 ,  C21D6/00 ,  C23C22/78 ,  C23C22/18 ,  C23C22/20 ,  C23C22/22 ,  H01F1/18 ,  C23C22/74

CPC classification number: C23C22/12 ,  C21D6/008 ,  C21D8/1288 ,  C21D9/46 ,  C23C22/182 ,  C23C22/188 ,  C23C22/20 ,  C23C22/22 ,  C23C22/74 ,  C23C22/78 ,  H01F1/18

Abstract: Provided is a treatment solution for chromium-free tension coating that can simultaneously achieve excellent moisture absorption resistance and a high iron loss reduction effect obtained by imparting sufficient tension, by using an inexpensive Ti source instead of expensive Ti chelate. The treatment solution for chromium-free tension coating contains: one or more of phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn; colloidal silica in an amount of 50 parts by mass to 120 parts by mass per 100 parts by mass of the phosphate in terms of solid content of Ti source in an amount of 30 parts by mass to 50 parts by mass per 100 parts by mass of the phosphate in terms of solid content of TiO2; and H3PO4, and the number of moles of metallic elements in the phosphate and of phosphorus in the treatment solution satisfy: 0.20≦[Mg]+[Ca+[Ba]+Sr]+[Zn]+[Mn]+1.5[Al])/[P]≦0.45  (1).