公开(公告)号：US11692272B2

公开(公告)日：2023-07-04

申请号：US17667029

申请日：2022-02-08

Applicant: JFE Steel Corporation

Inventor： Takashi Terashima ,  Makoto Watanabe ,  Toshito Takamiya

IPC: C23C22/07 ,  H01F1/18 ,  C23C22/22 ,  C23C22/18 ,  H01F1/147 ,  C23C22/74 ,  C23C22/33 ,  C23C22/20 ,  C23C22/12

CPC classification number: C23C22/07 ,  C23C22/12 ,  C23C22/188 ,  C23C22/20 ,  C23C22/22 ,  C23C22/33 ,  C23C22/74 ,  H01F1/14783 ,  H01F1/18

Abstract: Provided are coated metal, the metal having improved properties due to a novel coating, a coating-forming treatment solution for forming the novel coating, and a method for producing the coated metal that has the novel coating. The coated metal includes metal and a coating formed on the metal. The coating includes Si, P, and O, and at least one selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, and Mn. The coating includes a compound having a NASICON-type crystal structure represented by the general formula MIMIV2(MVO4)3.

公开(公告)号：US20220170131A1

公开(公告)日：2022-06-02

申请号：US17674264

申请日：2022-02-17

Applicant: JFE Steel Corporation

Inventor： Ryuichi Suehiro ,  Takashi Terashima ,  Toshito Takamiya ,  Makoto Watanabe ,  Masanori Uesaka

IPC: C21D9/46 ,  C21D8/12 ,  C22C38/02 ,  C22C38/04 ,  C22C38/60 ,  C22C38/00 ,  H01F1/147 ,  C21D8/00 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/54

Abstract: A method of manufacturing a grain oriented electrical steel sheet includes hot rolling a steel slab having a chemical composition including C: 0.002-0.10 mass %, Si: 2.5-5.0 mass %, Mn: 0.01-0.8 mass %, Al: 0.010-0.050 mass % and N: 0.003-0.020 mass % and the remainder being Fe and inevitable impurities to form a hot rolled sheet; subjecting the hot rolled sheet to one cold rolling or two or more cold rollings and interposing an intermediate annealing therebetween after hot band annealing or without hot band annealing to form a cold rolled sheet having a final thickness; subjecting the cold rolled sheet to a primary recrystallization annealing; applying an annealing separator to the surface of the steel sheet; and subjecting the sheet to a finish annealing and forming a tension coating.

公开(公告)号：US20220162759A1

公开(公告)日：2022-05-26

申请号：US17667029

申请日：2022-02-08

Applicant: JFE Steel Corporation

Inventor： Takashi Terashima ,  Makoto Watanabe ,  Toshito Takamiya

IPC: C23C22/07 ,  C23C22/22 ,  C23C22/18 ,  H01F1/147 ,  C23C22/74 ,  C23C22/33 ,  C23C22/20 ,  C23C22/12 ,  H01F1/18

Abstract: Provided are coated metal, the metal having improved properties due to a novel coating, a coating-forming treatment solution for forming the novel coating, and a method for producing the coated metal that has the novel coating. The coated metal includes metal and a coating formed on the metal. The coating includes Si, P, and O, and at least one selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, and Mn. The coating includes a compound having a NASICON-type crystal structure represented by the general formula MIMIV2(MVO4)3.

公开(公告)号：US10697038B2

公开(公告)日：2020-06-30

申请号：US15514746

申请日：2015-09-11

Applicant: JFE STEEL CORPORATION

Inventor： Masayasu Nagoshi ,  Tomohiro Matsushima ,  Makoto Watanabe ,  Shigehiro Takajo ,  Toshito Takamiya ,  Masanori Uesaka ,  Takashi Terashima

IPC: C21D9/46 ,  G01N21/62 ,  H01F1/18 ,  C21D8/12 ,  G01N23/225 ,  H01F1/16 ,  C22C38/02 ,  G01N23/2251 ,  H01F27/245 ,  H02K1/02 ,  H02K1/06

Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.

公开(公告)号：US10458021B2

公开(公告)日：2019-10-29

申请号：US16117369

申请日：2018-08-30

Applicant: JFE STEEL CORPORATION

Inventor： Takashi Terashima ,  Makoto Watanabe ,  Masanori Uesaka ,  Ryuichi Suehiro ,  Toshito Takamiya

IPC: C23C22/12 ,  C23C22/18 ,  C23C22/20 ,  C23C22/22 ,  C23C22/74 ,  C23C22/78 ,  C21D8/12 ,  C21D6/00 ,  C21D9/46 ,  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 SiO2; 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).

公开(公告)号：US10087529B2

公开(公告)日：2018-10-02

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 ,  C23C22/18 ,  C23C22/20 ,  C23C22/22 ,  C23C22/74 ,  C23C22/78 ,  C21D8/12 ,  H01F1/18 ,  C21D6/00 ,  C21D9/46

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 SiO2; 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).

公开(公告)号：US12055922B2

公开(公告)日：2024-08-06

申请号：US17423111

申请日：2020-01-08

Applicant: JFE STEEL CORPORATION

Inventor： Shinji Koseki ,  Masaru Fukumura ,  Hiroyasu Shigemori ,  Shiguma Uno ,  Noriko Ozawa ,  Toshito Takamiya

IPC: G05B19/418

CPC classification number: G05B19/41875 ,  G05B2219/32368

Abstract: An analysis system 10 includes: an operational data acquisition unit 11 that acquires operational data including an operational state of a production line 20; a product information acquisition unit 13 that acquires a state of a product manufactured in the production line and outputs the state of the product as product information; a production state analyzer 12 that obtains a predetermined physical quantity of the product on a basis of the operational data acquired by the operational data acquisition unit 11 and outputs the predetermined physical quantity as information on the physical quantity; and a correlation analyzer 14 that performs analysis of a correlation between the information on the physical quantity and the product information.

公开(公告)号：US11981821B2

公开(公告)日：2024-05-14

申请号：US17264129

申请日：2019-06-19

Applicant: JFE STEEL CORPORATION

Inventor： Takashi Terashima ,  Karin Kokufu ,  Makoto Watanabe ,  Toshito Takamiya

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

CPC classification number: C09D1/00 ,  B05D1/28 ,  B05D3/0254 ,  B05D7/14 ,  C23C26/00 ,  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：US20240102172A1

公开(公告)日：2024-03-28

申请号：US17769061

申请日：2020-06-25

Applicant: JFE Steel Corporation

Inventor： Takashi Terashima ,  Karin Kokufu ,  Makoto Watanabe ,  Toshito Takamiya

IPC: C23C26/00 ,  B05D1/28

CPC classification number: C23C26/00 ,  B05D1/28 ,  B05D2202/15 ,  B05D2401/20

Abstract: An electrical steel sheet with an insulating film, the steel sheet having an insulating film containing a crystalline fibrous material on a surface of the steel sheet, in which a ratio (LRD/LTD) of a length in a rolling direction (LRD) of the crystalline fibrous material in a cross section in the rolling direction of the insulating film to a length in a direction perpendicular to the rolling direction (LTD) of the crystalline fibrous material in a cross section in the direction perpendicular to the rolling direction of the insulating film is 1.5 or more and 50.0 or less.

公开(公告)号：US10889875B2

公开(公告)日：2021-01-12

申请号：US16432274

申请日：2019-06-05

Applicant: JFE STEEL CORPORATION

Inventor： Masayasu Nagoshi ,  Tomohiro Matsushima ,  Makoto Watanabe ,  Shigehiro Takajo ,  Toshito Takamiya ,  Masanori Uesaka ,  Takashi Terashima

IPC: C21D9/46 ,  G01N21/62 ,  H01F1/18 ,  C21D8/12 ,  G01N23/225 ,  H01F1/16 ,  C22C38/02 ,  G01N23/2251 ,  H01F27/245 ,  H02K1/02 ,  H02K1/06

Abstract: A grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet, wherein a total area percentage of defective parts scattered on the forsterite film is less than 1.5% relative to a surface area of the forsterite film when viewed from above the surface, and methods for evaluating a grain oriented electrical steel sheet comprising a grain oriented electrical steel sheet having a surface and a forsterite film formed on the surface of the steel sheet.