公开(公告)号：US20220140336A1

公开(公告)日：2022-05-05

申请号：US17430253

申请日：2020-01-31

Applicant: JFE STEEL CORPORATION ,  JFE MINERAL COMPANY, LTD.

Inventor： Mikito SUTO ,  Hiroyuki MASUOKA ,  Akira MATSUZAKI ,  Rintaro NAGANO

IPC: H01M4/525 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/131

Abstract: A positive electrode active material for a lithium-ion secondary cell having exceptional lithium ion conductivity, the positive electrode active material being such that the absorption of moisture from the atmosphere can be suppressed. This positive electrode active material for a lithium-ion secondary cell has powder particles that include a specific composite oxide, and an organic silicon compound affixed to the surface of the powder particles, the organic functional groups of the organic silicon compound including at least one selected from the group made of C2-10 alkyl groups and C6-14 aryl groups.

公开(公告)号：US20220173391A1

公开(公告)日：2022-06-02

申请号：US17602422

申请日：2020-04-07

Applicant: JFE MINERAL COMPANY, LTD. ,  JFE STEEL CORPORATION

Inventor： Rintaro NAGANO ,  Yoshiaki HAMANO ,  Koki TOKUMASU ,  Mika EMA ,  Mikito SUTO ,  Akira MATSUZAKI ,  Hiroyuki MASUOKA

IPC: H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M4/04 ,  H01M10/0525

Abstract: A precursor of a positive electrode material with which it is possible to obtain a lithium-ion secondary cell having an excellent discharge capacity and cycle characteristics, and a method for manufacturing the precursor. The precursor is a precursor of a positive electrode material used for a lithium-ion secondary cell, wherein the precursor is at least one substance selected from the group made of nickel-manganese composite hydroxides and nickel-manganese composite oxides, the precursor contains nickel and manganese, the ratio of the nickel content relative to the nickel content and the manganese content is 0.45-0.60 inclusive in molar ratio, and the average valence of manganese is below 4.0.

公开(公告)号：US20250108434A1

公开(公告)日：2025-04-03

申请号：US18729889

申请日：2022-11-28

Applicant: JFE STEEL CORPORATION

Inventor： Kazuki ENDOH ,  Yoshiyasu KAWASAKI ,  Masaki TADA ,  Takuya TAKASHITA ,  Jun HORIUCHI ,  Hiroyuki MASUOKA

IPC: B22F1/12 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/10 ,  B33Y80/00

Abstract: An additive manufacturing product including a steel matrix and ceramic particles dispersed in the steel matrix. The steel matrix has a chemical composition containing, in mass %, C: 0.030% or more and 0.800% or less, Si: 0.01% or more and 2.50% or less, Mn: 0.10% or more and 8.00% or less, P: 0.100% or less, S: 0.0200% or less, Al: 0.100% or less, N: 0.1000% or less, and O: 0.5000% or less, with the balance being Fe and inevitable impurity. The steel matrix has a steel microstructure where area fraction of pores is 0.50% or less, area fraction of martensite in a region excluding pores is 90% or more, average aspect ratio of prior austenite grains is 1.5 or more, and LHA/L is 2.0 or more. Melting point of the ceramic particles is 2000° C. or more.

公开(公告)号：US20200024744A1

公开(公告)日：2020-01-23

申请号：US16499419

申请日：2018-02-01

Applicant: JFE STEEL CORPORATION

Inventor： Shinichi FURUYA ,  Akira MATSUZAKI ,  Hiroyuki MASUOKA ,  Katsuya HOSHINO

IPC: C23C22/53 ,  B32B15/04 ,  C23C2/06 ,  C23C2/26 ,  C23C22/83 ,  C23C28/00

Abstract: There is provided a high-strength galvanized steel sheet and a relatively low-strength galvanized steel sheet that undergoes complex forming, a galvanized steel sheet that exhibits consistently excellent press formability and that generates no hazardous fumes during welding as well as a manufacturing method therefor. The galvanized steel sheet has an oxide layer on the surface, where the oxide layer has an average thickness of 20 nm or more, and the oxide layer contains 30 mg/m2 or more of Zn, 1.0 mg/m2 or more of S, and 50 mg/m2 or more and 1,000 mg/m2 or less of polyethylene particles having an average particle size of 5.0 μm or less.

公开(公告)号：US20180298503A1

公开(公告)日：2018-10-18

申请号：US15737904

申请日：2016-07-07

Applicant: JFE STEEL CORPORATION

Inventor： Yuta TERASAKI ,  Hiroyuki AKIMOTO ,  Hiroyuki MASUOKA

IPC: C23G1/08 ,  C21D9/56 ,  C23G3/02

Abstract: A method of producing a cold rolled steel strip includes: subjecting a steel strip that has been cold rolled and subsequently continuously annealed to pickling by continuously feeding the steel strip into a mixed acid solution containing a first acid that is oxidizing and a second acid that is non-oxidizing to immerse the steel strip; and subsequently subjecting the steel strip to repickling by continuously feeding the steel strip into an acid solution containing a third acid that is non-oxidizing to immerse the steel strip. The concentration of the first acid in the mixed acid solution is lowered and the concentration of the second acid in the mixed acid solution is raised as the iron ion concentration in the mixed acid solution rises.

公开(公告)号：US20180305786A1

公开(公告)日：2018-10-25

申请号：US16065419

申请日：2016-11-08

Applicant: JFE STEEL CORPORATION

Inventor： Masaki KOBA ,  Yoshitsugu SUZUKI ,  Hiroyuki MASUOKA

IPC: C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C21D6/00 ,  C23C2/28 ,  C23C2/40 ,  B32B15/01

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

Abstract: A high-strength hot-dip coated hot-rolled steel sheet excellent in terms of surface appearance quality and coating adhesiveness and a method for manufacturing. The method includes performing hot rolling followed by pickling on steel to form a pickled steel sheet, the steel having a chemical composition containing, by mass %, C: 0.02% or more and 0.30% or less, Si: 0.01% or more and 1.0% or less, Mn: 0.3% or more and 2.5% or less, P: 0.08% or less, S: 0.02% or less, Al: 0.001% or more and 0.20% or less, and Fe and inevitable impurities. The method further includes performing rolling with a rolling reduction ratio of 1% or more and 10% or less, and a hot-dip coating treatment. The obtained steel sheet has an arithmetic average roughness Ra of 2.0 μm or less on the surface of the steel sheet, and a tensile strength of 590 MPa or more.

公开(公告)号：US20250163552A1

公开(公告)日：2025-05-22

申请号：US18730452

申请日：2022-11-28

Applicant: JFE STEEL CORPORATION

Inventor： Kazuki ENDOH ,  Yoshiyasu KAWASAKI ,  Masaki TADA ,  Takuya TAKASHITA ,  Jun HORIUCHI ,  Hiroyuki MASUOKA

IPC: C22C38/04 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38 ,  C22C38/60

Abstract: An additive manufacturing product that has a chemical composition containing, in mass %, C: 0.030% or more and 0.800% or less, Si: 0.01% or more and 2.50% or less, Mn: 0.10% or more and 8.00% or less, P: 0.100% or less, S: 0.0200% or less, Al: 0.100% or less, N: 0.1000% or less, and O: 0.5000% or less, with the balance being Fe and inevitable impurity. The additive manufacturing product has a steel microstructure where area fraction of pores is 0.50% or less, area fraction of martensite in a region excluding pores is 90% or more, average aspect ratio of prior austenite grains is 1.5 or more, and LHA/L, high-angle grain boundary length LHA divided by grain boundary length L with a misorientation angle of 20° or more and 50° or less, is 2.0 or more.

公开(公告)号：US20240182301A1

公开(公告)日：2024-06-06

申请号：US18258329

申请日：2021-09-27

Applicant: JFE STEEL CORPORATION

Inventor： Hiroyuki MASUOKA ,  Daisuke TAHARA ,  Akira MATSUZAKI

IPC: C01B21/064 ,  H05H1/46

CPC classification number: C01B21/0648 ,  H05H1/46 ,  C01P2002/76 ,  H05H2242/10

Abstract: Provided is a hexagonal boron nitride powder that can achieve higher thermal conductivity when added as a filler to resin. A plasma treatment method of plasma-treating a hexagonal boron nitride powder under reduced pressure comprises: storing the hexagonal boron nitride powder in a treatment container; supplying a plasma generating gas into the treatment container and maintaining inside of the treatment container at a pressure lower than atmospheric pressure; applying high frequency waves to an electrode installed outside the treatment container while rotating the treatment container about a central axis of the treatment container as a rotation axis in a state in which the rotation axis of the treatment container is inclined with respect to horizontal, to plasma-treat the hexagonal boron nitride powder in the treatment container; and cooling one or both of the treatment container and the electrode during the plasma treatment.

公开(公告)号：US20220380213A1

公开(公告)日：2022-12-01

申请号：US17754370

申请日：2020-09-29

Applicant: JFE STEEL CORPORATION

Inventor： Daisuke TAHARA ,  Hiroyuki MASUOKA ,  Akira MATSUZAKI

IPC: C01B21/064 ,  C08K3/38

Abstract: Provided is a boron nitride powder having excellent adhesion to a resin. The boron nitride powder has a hexagonal structure, has a carboxyl group present on a surface of the boron nitride powder, and has a molar ratio of carboxyl group to nitrogen atom of 0.001 or more on a surface of the boron nitride powder.

公开(公告)号：US20210407738A1

公开(公告)日：2021-12-30

申请号：US17294823

申请日：2019-12-09

Applicant: JFE STEEL CORPORATION

Inventor： Mikito SUTO ,  Hiroyuki MASUOKA ,  Akira MATSUZAKI

IPC: H01G9/20 ,  H01G9/00 ,  C23C14/08 ,  C23C14/34 ,  C23C28/04 ,  C25D9/08

Abstract: The present invention provides a novel method for producing a laminate to be used as a light-transmissive electrode layer and an N-type semiconductor layer of a wet or solid-state dye-sensitized solar cell comprising a light-transmissive electrode layer, an N-type semiconductor layer, a P-type semiconductor layer, and a facing electrode in this order. In said method, a member to be used as the light-transmissive electrode layer is cathode-polarized in a treatment solution containing a Ti component so as to form a titanium oxide layer to be used as the N-type semiconductor layer on said member.