公开(公告)号：US20240263289A1

公开(公告)日：2024-08-08

申请号：US18410235

申请日：2024-01-11

Applicant: PROTERIAL, LTD.

Inventor： Hajime ITAGAKI ,  Morifumi KUROKI ,  Makoto SASAKI ,  Shin NAKAJIMA

IPC: C22C45/00 ,  B23K26/362 ,  C21D8/12 ,  C22C45/02 ,  H01F1/153 ,  H01F27/25 ,  H01F27/255 ,  H01F30/10 ,  H01F30/12

CPC classification number: C22C45/008 ,  B23K26/362 ,  C21D8/1294 ,  C22C45/02 ,  H01F1/15308 ,  H01F27/25 ,  H01F27/255 ,  H01F30/10 ,  H01F30/12

Abstract: An Fe-based amorphous alloy ribbon reduced in iron loss, less deformed, and highly productive in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon having first and second surfaces, and is provided with continuous linear laser irradiation marks on at least the first surface. Each linear laser irradiation mark is formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon, and has unevenness on its surface. When the unevenness is evaluated in the casting direction, a height difference HL×width WA calculated from the height difference HL between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon and the width WA which is a length of the linear irradiation mark on the first surface is 6.0 to 180 μm2.

公开(公告)号：US11970751B2

公开(公告)日：2024-04-30

申请号：US17421779

申请日：2020-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Yoshiyuki Ushigami ,  Shinji Yamamoto ,  Hideyuki Hamamura ,  Takashi Kataoka ,  Shunsuke Okumura

IPC: C21D9/46 ,  C21D3/04 ,  C21D6/00 ,  C21D8/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147

CPC classification number: C21D9/46 ,  C21D3/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1283 ,  C21D8/1294 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01F1/147 ,  C21D2221/00

Abstract: The grain-oriented electrical steel sheet according to the present embodiment is a grain-oriented electrical steel sheet having a base steel sheet (1), an intermediate layer (4) disposed to be in contact with the base steel sheet (1), and an insulation coating (3) disposed to be in contact with the intermediate layer (4). The grain-oriented electrical steel sheet according to the present embodiment includes a surface of the base steel sheet (1) having a strain region (D) which extends in a direction intersecting a rolling direction of the base steel sheet (1), and a crystalline phosphorus oxide M2P4O13 present in the insulation coating (3) on the strain region (D) in a cross-sectional view of a surface parallel to the rolling direction and a sheet thickness direction of the base steel sheet (1). (M means at least one or both of Fe and Cr.)

公开(公告)号：US10072943B2

公开(公告)日：2018-09-11

申请号：US14002231

申请日：2012-03-05

Applicant: Peter Kogej ,  Vojteh Leskovsek

Inventor： Peter Kogej ,  Vojteh Leskovsek

IPC: G01D5/12 ,  C21D7/02 ,  C21D7/10 ,  C21D8/12 ,  C21D9/00 ,  C21D10/00 ,  C23C8/02 ,  H01F1/16 ,  B23P13/00 ,  C23C8/38

CPC classification number: G01D5/12 ,  B23P13/00 ,  C21D7/02 ,  C21D7/10 ,  C21D8/12 ,  C21D8/1233 ,  C21D8/1277 ,  C21D8/1294 ,  C21D9/00 ,  C21D9/0068 ,  C21D10/00 ,  C21D10/005 ,  C21D2201/00 ,  C21D2211/001 ,  C21D2211/008 ,  C23C8/02 ,  C23C8/38 ,  H01F1/16 ,  Y10T29/49

Abstract: The present invention relates to a method for producing a magnetic substrate for an encoder scale. The method comprising the step of mechanically working the substrate, wherein the substrate is cooled prior to the mechanical working step. In one embodiment, a stainless steel substrate is used. The stainless steel may comprise an austenite (non-magnetic) phase and a martensite (magnetic) phase. Mechanically working and cooling in this manner increases the amount of magnetic (martensite) phase material that is formed, thereby improving the magnetic contrast when non-magnetic (austenite) marking are subsequently formed on the substrate by laser marking.

公开(公告)号：US10020101B2

公开(公告)日：2018-07-10

申请号：US14367654

申请日：2012-12-21

Applicant: JFE STEEL CORPORATION

Inventor： Shigehiro Takajo ,  Seiji Okabe

IPC: H01F1/16 ,  C21D8/12 ,  C22C38/00 ,  C21D1/38 ,  C21D1/34

CPC classification number: H01F1/16 ,  C21D1/34 ,  C21D1/38 ,  C21D8/12 ,  C21D8/1244 ,  C21D8/1294 ,  C21D2201/05 ,  C22C38/00

Abstract: Disclosed is a grain-oriented electrical steel sheet exhibiting low hysteresis loss and low coercive force, in which an increase in hysteresis loss due to laser irradiation or electron beam irradiation, which has been a conventional concern, is effectively inhibited. The grain-oriented electrical steel sheet has closure domain regions (X) formed to divide the magnetic domains in a rolling direction, from one end to the other in the width direction of the steel sheet, provided that Expression (1) is satisfied: −(500t−80)×s+230≤w≤−(500t−80)×s+330   Expression (1), where t represents a sheet thickness (mm); w represents a smaller one of the widths (μm) of the regions measured on the front and rear surfaces of the steel sheet, respectively, by using a Bitter method; and s represents an average number of the regions present within one crystal grain.

公开(公告)号：US20180119242A1

公开(公告)日：2018-05-03

申请号：US15529141

申请日：2015-12-10

Applicant: JFE STEEL CORPORATION

Inventor： Hirokazu KOBAYASHI

IPC: C21D8/12 ,  C25F3/06 ,  C25F3/14 ,  H01F1/16 ,  G03F7/40 ,  B23K26/364

CPC classification number: C21D8/1294 ,  B23K26/082 ,  B23K26/0846 ,  B23K26/18 ,  B23K26/364 ,  B23K26/40 ,  B23K2101/16 ,  B23K2103/04 ,  C21D8/12 ,  C21D8/1255 ,  C21D10/00 ,  C21D2201/05 ,  C25F3/06 ,  C25F3/14 ,  G03F7/40 ,  H01F1/16

Abstract: A resist coating for etching use which enables high speed and high accuracy patterning is provided by applying, to a cold rolled steel strip, a positive resist ink which solubilizes upon exposure to light; then drying the positive resist ink to form a resist coating; then scanning a laser beam converged in a point shape in the width direction of the cold rolled steel strip to form a photosensitive portion; and then removing the photosensitive portion of the resist film with a developing solution. Subsequently, by dissolving and removing by etching a portion of the steel strip below the removed portion of the resist coating, a fine and uniform linear groove can be formed in a surface of the steel strip.

公开(公告)号：US20180043474A1

公开(公告)日：2018-02-15

申请号：US15549784

申请日：2016-04-19

Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION

Inventor： Hideyuki HAMAMURA ,  Tatsuhiko SAKAI ,  Fumiaki TAKAHASHI ,  Hisashi MOGI ,  Shunsuke OKUMURA ,  Hirofumi IMAI

IPC: B23K26/364 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B23K26/00 ,  C21D8/12 ,  C21D8/00 ,  C21D6/00 ,  C21D3/04 ,  B05D3/02 ,  B05D7/14 ,  C22C38/42 ,  C21D9/46

CPC classification number: B23K26/364 ,  B05D3/0254 ,  B05D7/14 ,  B23K26/359 ,  C21D3/04 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/00 ,  C21D8/005 ,  C21D8/12 ,  C21D8/1255 ,  C21D8/1261 ,  C21D8/1294 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C2202/02 ,  C25F1/00 ,  H01F1/16

Abstract: Provided is a grain-oriented electrical steel sheet including a steel sheet having a steel sheet surface in which a groove, which extends in a direction intersecting a rolling direction and of which a groove depth direction matches a sheet thickness direction, is formed. When an average value of a groove depth in a sheet thickness direction at a central portion of the groove in a longitudinal groove direction is set as an average groove depth D, a straight line, which connects a first point at which a groove depth in the sheet thickness direction becomes 0.05×D and a second point at which the groove depth becomes 0.50×D, at an inclined portion of the groove is set as a groove end straight line, an angle made by the steel sheet surface and the groove end straight line is set as a first angle θ, and an average value of a groove-width-direction length, which is a length of a line segment connecting two points at which a groove depth in the sheet thickness direction in a contour of the groove on the groove-width-direction cross-section becomes 0.05×D, is set as an average groove width W, an aspect ratio A obtained by dividing the average groove depth D by the average groove width W, and the first angle θ satisfy the following Expression (1). θ

公开(公告)号：US20180037965A1

公开(公告)日：2018-02-08

申请号：US15552297

申请日：2016-02-12

Applicant: JFE STEEL CORPORATION

Inventor： Shigehiro TAKAJO ,  Takeshi OMURA ,  Seiji OKABE

IPC: C21D8/12 ,  H01F1/16 ,  H01F27/245

CPC classification number: C21D8/1294 ,  C21D8/12 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F27/245

Abstract: Disclosed are a grain-oriented electrical steel sheet having strain regions extending in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: Wmax/Wmin=1.2 or more and less than 2.5, where Wmax and Wmin respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; Wave being 80 μm or more, where Wave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 μm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and (Wave*D)/s being 0.0007 mm or more and 0.0016 mm or less.

公开(公告)号：US20180030559A1

公开(公告)日：2018-02-01

申请号：US15549742

申请日：2016-02-12

Applicant: JFE STEEL CORPORATION

Inventor： Masanori UESAKA ,  Makoto WATANABE ,  Shigehiro TAKAJO

IPC: C21D8/12 ,  C22C38/02 ,  C21D9/46 ,  H01F27/245 ,  C21D6/00 ,  C21D3/04 ,  B05D7/14 ,  H01F1/18 ,  C22C38/04 ,  C21D8/00

CPC classification number: C21D8/1294 ,  B05D7/14 ,  C21D3/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/12 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C2202/02 ,  C23C22/00 ,  H01F1/16 ,  H01F1/18 ,  H01F27/245

Abstract: In a grain-oriented electrical steel sheet including: a steel substrate; a ceramic base film; and an insulating coating, critical damage shear stress τ between the base film and the steel substrate is 50 MPa or more. Thus, a grain-oriented electrical steel sheet having excellent insulation property, stacking factor, and magnetic property is provided without coating damage even when magnetic domain refining treatment by thermal strain is performed.

公开(公告)号：US20170253942A1

公开(公告)日：2017-09-07

申请号：US15506437

申请日：2014-12-10

Applicant: POSCO

Inventor： Ho-Kyung SHIM

IPC: C21D9/46 ,  B23K26/00 ,  H01F27/245 ,  B23K26/70 ,  C21D6/00 ,  H01F41/02 ,  B23K26/352 ,  B23K26/06

CPC classification number: C21D9/46 ,  B23K26/0643 ,  B23K26/082 ,  B23K26/352 ,  B23K26/702 ,  C21D6/008 ,  C21D8/1294 ,  H01F27/245 ,  H01F41/0233

Abstract: Disclosed is a magnetic domain refining method for radiating a laser beam to a surface of a directional electrical steel plate at intervals, which is capable of further reducing noise along with an iron loss reduction effect and further improving iron loss and noise reduction effects in an area where the directional electrical steel plate are bonded together, such as the joint part of the iron core of a transformer. Irradiated radiations formed by a laser beam in at least any one area of the directional electrical steel plate are unfolded in a fan rib form using one point of the directional electrical steel plate as a central point.

公开(公告)号：US20150132547A1

公开(公告)日：2015-05-14

申请号：US14368975

申请日：2012-12-27

Applicant: JFE Steel Corporation

Inventor： Hirotaka Inoue ,  Shigehiro Takajo ,  Hiroi Yamaguchi ,  Seiji Okabe ,  Kazuhiro Hanazawa

IPC: H01F1/18 ,  C21D6/00 ,  C23F17/00 ,  C21D8/12 ,  C22C38/00 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  H01F41/02 ,  C22C38/60

CPC classification number: H01F1/18 ,  C21D1/38 ,  C21D6/001 ,  C21D6/005 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1255 ,  C21D8/1272 ,  C21D8/1283 ,  C21D8/1294 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/60 ,  C23C8/50 ,  C23C8/80 ,  C23C22/74 ,  C23F17/00 ,  H01F41/02 ,  Y10T428/24851

Abstract: A grain-oriented electrical steel sheet, on which magnetic domain refining treatment by strain application has been performed, has an insulating coating with excellent insulation properties and corrosion resistance. The grain-oriented electrical steel sheet is obtained by irradiating a steel sheet with a high-energy beam to apply, to the steel sheet, linear strain extending in a direction that intersects a rolling direction of the steel sheet, and then re-forming an insulating coating on the steel sheet, in which in an irradiation mark region due to the high-energy beam, a ratio of an area containing defects on the insulating coating is 40% or less, a maximum width of the irradiation mark region in the rolling direction is 250 μm or less, and a thickness of the insulating coating is 0.3 μm or more and 2.0 μm or less.

Abstract translation: 已经通过应变施加进行磁畴精制处理的晶粒取向电工钢板具有绝缘性和耐腐蚀性优异的绝缘涂层。 晶粒取向电工钢板是通过用高能束照射钢板而获得的，以向钢板施加沿与钢板的轧制方向相交的方向延伸的线性应变，然后重新形成 绝缘涂层在钢板上，其中在由高能束引起的照射标记区域中，绝缘涂层上含有缺陷的区域的比例为40％以下，轧制中的照射标记区域的最大宽度 方向为250μm以下，绝缘层的厚度为0.3μm以上且2.0μm以下。