公开(公告)号：US20230193425A1

公开(公告)日：2023-06-22

申请号：US18014466

申请日：2021-07-09

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Takuya MITSUNOBU ,  Mamoru SAITO ,  Yuto FUKUDA ,  Yasuto GOTO ,  Hidetoshi SHINDO ,  Fumiaki NAKAMURA ,  Koji KAWANISHI ,  Ryohei MIMURA

IPC: C22C18/04

CPC classification number: C22C18/04

Abstract: A plated steel including a plated layer on a surface of a steel, in which Expression 1 of 0≤Cr+Ti+Ni+Co+V+Nb+Cu+Mn 0.25 and Expression 2 of 0≤Sr+Sb+Pb+B+Li+Zr+Mo+W+Ag+P≤0.50 are satisfied, and Expression 3 of I(MgZn2 (41.31°))/IΣ(MgZn2)≤0.265 and Expression 6 of 0.150≤{I(MgZn2 (20.79°))+I(MgZn2 (42.24°))}/IΣ(MgZn2) are further satisfied in an X-ray diffraction pattern of a surface of the plated layer measured using Cu-Kα rays under a condition that an X-ray output is 40 kV and 150 mA.

公开(公告)号：US20240183018A1

公开(公告)日：2024-06-06

申请号：US18553206

申请日：2022-04-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Mamoru SAITO ,  Yasuto GOTO

IPC: C23C2/06 ,  C21D8/02 ,  C21D9/46 ,  C22C18/04 ,  C23C2/26 ,  C23C2/40

CPC classification number: C23C2/06 ,  C21D8/0226 ,  C21D9/46 ,  C22C18/04 ,  C23C2/261 ,  C23C2/40

Abstract: Provided is a Zn—Al—Mg alloy coated checkered steel sheet having on the sheet surface thereof convex part and flat part, wherein: the coating layer has a predetermined chemical composition, and when observing a cross section of cutting edge orthogonal to a longitudinal direction of the convex part and taken along a sheet thickness direction at a central part in the longitudinal direction of the convex part, a layer thickness ratio of the coating layer of the flat part on left and right of the convex part (layer thickness of left coating layer/layer thickness of right coating layer) is from 0.2 to 5.0, and a convex height T−t, where T is a sheet thickness of the substrate checkered steel sheet at the convex part and t is a sheet thickness of the substrate checkered steel sheet at the flat part, and a gap height x between a stationary surface and a sheet surface of the coated checkered steel sheet opposite to the stationary surface in a case in which the coated checkered steel sheet is placed in a stationary position satisfy the following Formulas 1 and 2 below.


x/(T−t)≤1.5  Formula 1:



0.5

公开(公告)号：US20220216548A1

公开(公告)日：2022-07-07

申请号：US17608418

申请日：2020-06-10

Applicant: NIPPON STEEL CORPORATION

Inventor： Akinobu KOBAYASHI ,  Koichi NOSE ,  Yasuto GOTO ,  Takehiro TAKAHASHI ,  Tatsuo NAGATA ,  Masaharu IBARAGI

IPC: H01M50/124 ,  H01M50/103 ,  H01M50/169 ,  H01M50/164 ,  H01M50/15

Abstract: A battery case and method of production of the same realizing smaller size, higher mountability, longer service life, and lower cost than in the past, that is, a battery case comprising a container body and a container cover, in which battery case, one or both of the container body and the container cover are made from a laminated steel sheet comprised of a plated steel sheet on which a film having a polyolefin-based resin as a main constituent is laminated, a joined part of the container body and the container cover has a welded part of the plated steel sheet, a melt bonded part of the film, and a gap part between the welded part and the melt bonded part, where a length of gap part/thickness of plated steel sheet ≤10.0 and a length of gap part/length of joined part

公开(公告)号：US20230072743A1

公开(公告)日：2023-03-09

申请号：US17796643

申请日：2021-03-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuto GOTO ,  Kiyokazu ISHIZUKA ,  Tatsuo NAGATA ,  Katsumasa MATSUMOTO

IPC: B32B15/01 ,  C22C19/03 ,  C25D3/56 ,  C25D5/50

Abstract: A Ni-plated steel sheet according to one aspect of the present invention includes a base steel sheet; and a Ni plating layer provided on a surface of the base steel sheet, wherein the Ni plating layer includes a Ni—Fe alloy layer formed on the surface of the base steel sheet, and a ratio of a Sn content to a Ni content in the Ni plating layer is 0.0005% to 0.10%.

公开(公告)号：US20220371302A1

公开(公告)日：2022-11-24

申请号：US17771012

申请日：2020-10-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Mamoru SAITO ,  Yasuto GOTO ,  Kiyokazu ISHIZUKA

IPC: B32B15/01 ,  C22C18/04 ,  C23C2/06 ,  C23C2/40

Abstract: A coated steel material including: a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, wherein the coating layer has a predetermined chemical composition, and, in a backscattered electron image of the Zn—Al—Mg alloy layer that is obtained at a time of observing the surface of the Zn—Al—Mg alloy layer after polishing to ½ of the layer thickness, under a scanning electron microscope at a magnification of 100×, Al crystals are present, and the average value of the cumulative circumferential length of the Al crystals is 88 to 195 mm/mm2.

公开(公告)号：US20220356547A1

公开(公告)日：2022-11-10

申请号：US17619268

申请日：2020-04-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Mamoru SAITO ,  Jun MAKI ,  Takuya MITSUNOBU ,  Yasuto GOTO

IPC: C22C18/04 ,  B32B15/01 ,  C23C2/06 ,  C23C2/40

Abstract: A hot-dip coated steel product including: a steel product; and a coating layer including a Zn—Al—Mg alloy layer disposed on a surface of the steel product, in which the Zn—Al—Mg alloy layer includes a Zn phase, an Al phase, and a MgZn2 phase, and contains a Mg—Sn intermetallic compound phase in the Zn phase, and the coating layer has a chemical composition satisfying a predetermined average composition, a total area proportion of the Al phase and the MgZn2 phase is 70% or more, an area proportion of the Zn phase is 30% or less, an average value of cumulative circumferential lengths of the Al phase is less than 88 mm/mm2, and a total frequency in number of the Al phase having a circumferential length of 50 μm or more is less than 100.

公开(公告)号：US20220010450A1

公开(公告)日：2022-01-13

申请号：US17291846

申请日：2019-12-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Takehiro TAKAHASHI ,  Yasuto GOTO ,  Jun MAKI

IPC: C25D5/14

Abstract: A Ni-coated steel sheet according to an aspect of the present invention includes: a base steel sheet; a diffusion alloy layer disposed on the base steel sheet; and a Ni-coated layer disposed on the diffusion alloy layer, in which a depth-hardness curve obtained by continuously performing Vickers hardness measurement on a cross section perpendicular to a rolled surface of the base steel sheet from a surface layer of the Ni-coated layer to the base steel sheet using a nanoindenter includes, in the diffusion alloy layer, a peak indicating a Vickers hardness of 1.50 times or more a Vickers hardness of the surface layer of the Ni-coated layer.

公开(公告)号：US20210269929A1

公开(公告)日：2021-09-02

申请号：US17253322

申请日：2019-07-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Takehiro TAKAHASHI ,  Mamoru SAITO ,  Kiyokazu ISHIZUKA ,  Yasuto GOTO

IPC: C25D3/12 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C25D3/20 ,  C21D8/00

Abstract: A surface-treated steel sheet of the present invention includes a base steel sheet and a Ni—Co—Fe alloy-plated layer on at least one surface of the base steel sheet, in which, in the alloy-plated layer, a Ni coating weight is 7.1 to 32.5 g/m2, a Co coating weight is 0.65 to 5.2 g/m2, and a total of the Ni coating weight and the Co coating weight is in a range of 9.0 to 35.0 g/m2. In an outermost layer of the alloy-plated layer, a Co concentration is in a range of 20 to 60 atom %, and a Fe concentration is in a range of 5 to 30 atom %. In the alloy-plated layer, a region having a thickness of 2 μm or more, in which a total of a Ni concentration and the Co concentration is 10 atom % or more and the Fe concentration is 5 atom % or more, is present, and the base steel sheet has a predetermined chemical composition, and a ferrite grain size number is 9.0 or more.

公开(公告)号：US20210147996A1

公开(公告)日：2021-05-20

申请号：US17044678

申请日：2019-04-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Takehiro TAKAHASHI ,  Kiyokazu ISHIZUKA ,  Yasuto GOTO

IPC: C25D5/50 ,  C25D3/12 ,  C21D9/46 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/08 ,  B32B15/01

Abstract: A Ni diffusion-plated steel sheet of the present invention includes a base steel sheet and a Fe—Ni diffusion alloy-plating layer positioned on at least one surface of the base steel sheet, a Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 35 g/m2, a Fe concentration Cs of an outermost layer of the Fe—Ni diffusion alloy-plating layer is 10 to 55 mass %, the base steel sheet has a predetermined chemical composition, and a ferrite grain size number specified by JIS G 0551 (2013) of the base steel sheet is 10.0 or more.

公开(公告)号：US20250109475A1

公开(公告)日：2025-04-03

申请号：US18840411

申请日：2023-02-22

Applicant: NIPPON STEEL CORPORATION

Inventor： Kotaro ISHII ,  Kohei TOKUDA ,  Yasuto GOTO ,  Mamoru SAITO

IPC: C23C2/06 ,  C22C18/00

Abstract: This metallic coated steel includes a steel material and a metallic coating layer. The metallic coating layer has an average chemical composition including Al: 0.2% to less than 4.0%, Mg: more than 4.0% and less than 12.5%, Ca: 0.15% to less than 3.00%, Zn: 65% or more, and impurities. In an any perpendicular cross section (in a thickness direction) in the metallic coating layer, a metallurgical structure observed in a scanning electron microscope observed visual field contains, in terms of area fraction, an MgZn2 phase: 10 to 40%, an Al—Zn phase: 0 to 15%, an Al phase: (Zn