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：US20230203635A1

公开(公告)日：2023-06-29

申请号：US18009015

申请日：2021-09-07

Applicant: NIPPON STEEL CORPORATION

Inventor： Takuya MITSUNOBU ,  Mamoru SAITO ,  Kohei TOKUDA ,  Hiroshi TAKEBAYASHI

IPC: C23C2/06 ,  C23C2/28 ,  C22C18/04

CPC classification number: C23C2/06 ,  C22C18/04 ,  C23C2/29

Abstract: A hot-dip plated steel according to one aspect includes a base steel and a hot-dip plating layer disposed on a surface of the base steel, a chemical composition of the hot-dip plating layer contains, by mass%, Al: 10.00% to 30.00%, Mg: 3.00% to 12.00%, Sn: 0% to 2.00%, Si: 0% to 2.50%, Ca: 0% to 3.00%, Ni: 0% or more and less than 0.25%, Fe: 0% to 5.00%, and the like, a remainder consists of Zn and impurities, a metallographic structure of the hot-dip plating layer contains 5 to 45 area% of an α phase having a grain diameter of 0.5 to 2 µm, the metallographic structure of the hot-dip plating layer contains 15 to 70 area% of a MgZn2 phase, and, among the α phases having the grain diameter of 0.5 to 2 µm, an area ratio of an α phase having a (111)α//(0001)MgZn2 orientation relationship to the adjacent MgZn2 phase is 25% to 100%.

公开(公告)号：US20190381765A1

公开(公告)日：2019-12-19

申请号：US16489652

申请日：2018-03-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Mamoru SAITO ,  Takehiro TAKAHASHI ,  Kiyokazu ISHIZUKA

IPC: B32B15/01 ,  C22C38/14 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C19/03 ,  H01M2/02 ,  C25D5/12 ,  C25D5/50 ,  C25D7/00 ,  C25D3/12

Abstract: A surface-treated steel sheet according to an aspect of the present invention includes: a steel sheet as a base metal and a coating layer, in which the coating layer includes a Ni—Co alloy coating layer, a Ni—Fe alloy layer, and a Ni layer, in the coating layer, a total adhesion amount of Co is 0.2 g/m2 to 2.3 g/m2, and a total adhesion amount of Ni is 8.9 g/m2 or more, the Ni layer has a thickness of 0.3 μm to 3.0 μm, an atomic concentration of Co on a surface of the Ni—Co alloy coating layer is 20 at % to 70 at %, and a Co concentration gradient y in the coating layer in a depth direction is 50 mass %/μm to 400 mass %/μm.

公开(公告)号：US20250109477A1

公开(公告)日：2025-04-03

申请号：US18839238

申请日：2023-02-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Mamoru SAITO ,  Yuto FUKUDA

IPC: C23C2/40 ,  C21D9/46 ,  C22C21/06 ,  C23C2/12

Abstract: A hot-dip plated steel sheet has a plating layer, in which the plating layer contains Al: more than 30.0% and 50.0% or less, Mg: more than 5.0% and 15.0% or less, Si: more than 0.5% and 1.0% or less when Al is more than 30.0% and less than 35.0%, and 0.03% or more and 1.0% or less when Al is 35.0% or more and 50.0% or less, Fe: 0% or more and 5.0% or less, and a remainder consisting of Zn and impurities, and, in an X-ray diffraction pattern of a surface of the plating layer, I1 obtained from X-ray diffraction peaks of Zn, Al, and MgZn2 is 0.10 or less and I2 obtained from an X-ray diffraction peak of Al2O5Si is 1.05 or more.

公开(公告)号：US20240336996A1

公开(公告)日：2024-10-10

申请号：US18703998

申请日：2022-08-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Mamoru SAITO ,  Yuto FUKUDA ,  Yasuto GOTO ,  Yasuhiro MAJIMA ,  Naoyuki YAMATO ,  Fumiaki NAKAMURA ,  Hidetoshi SHINDO ,  Koji KAWANISHI ,  Kenichiro MATSUMURA ,  Hiroshi TAKEBAYASHI

IPC: C22C18/04 ,  C23C30/00

CPC classification number: C22C18/04 ,  C23C30/005

Abstract: A plated steel sheet comprises a plated layer on a surface of a steel sheet, in which in the plated layer, the total amount ΣA of Sn, Bi, and In is less than 0.75%, the total amount ΣB of Ca, Y, La, and Ce is 0.03 to 0.60%, the total amount ΣC of Cr, Ti, Ni, Co, V, Nb, Cu, and Mn is 0 to 1.00%, Sn≤Si, and 20.0≤Mg/Si are satisfied, and in an X-ray diffraction pattern of a surface of the plated layer, an X-ray diffraction peak of Al2.15Zn1.85Ca, an X-ray diffraction peak of CaZn2, and an X-ray diffraction peak of η′-MgZn2 satisfy a predetermined relationship.

公开(公告)号：US20240043980A1

公开(公告)日：2024-02-08

申请号：US18271990

申请日：2021-11-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Mamoru SAITO ,  Takuya MITSUNOBU ,  Tetsuya TOBA ,  Yasuto GOTO ,  Atsushi MORISHITA ,  Yasuaki KAWAMURA ,  Fumiaki NAKAMURA ,  Koji KAWANISHI

IPC: C23C2/06

CPC classification number: C23C2/06

Abstract: A plated steel material having a plating layer having an average chemical composition containing, in mass %, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (ΣA) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (ΣB) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0≤SMg/Si

公开(公告)号：US20230323521A1

公开(公告)日：2023-10-12

申请号：US18249382

申请日：2021-09-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Mamoru SAITO ,  Yasuto GOTO

IPC: C23C2/06 ,  C22C18/04 ,  C23C2/28

CPC classification number: C23C2/06 ,  C22C18/04 ,  C23C2/29

Abstract: A coated steel product including a base steel, and a coating layer containing a Zn—Al—Mg alloy layer disposed on a surface of the base steel, in which the coating layer has a predetermined chemical composition, the coated steel product including dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less on a surface of the Zn—Al—Mg alloy layer, an area ratio of the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less being from 30% to 80% within a region of an observable field of view of 5 mm2, and among the dendrite-shaped MgZn2 phase having a surface roughness Sa of 50 nm or less, a number of dendrite-shaped MgZn2 phase having an area of 0.1 mm2 or more being from 5 to 100 within a region of an observable field of view of 25 mm2.

公开(公告)号：US20220145473A1

公开(公告)日：2022-05-12

申请号：US17437746

申请日：2020-03-19

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiromasa SHOJI ,  Kiyokazu ISHIZUKA ,  Kohei TOKUDA ,  Mamoru SAITO ,  Yasuto GOTO ,  Ikumi TOKUDA

IPC: C23C28/00 ,  C22C18/04 ,  C23C22/36

Abstract: A surface-treated metal material includes a metal sheet, a plating layer formed on the metal sheet and containing aluminum, magnesium, and zinc, and a composite coating formed on a surface of the plating layer, the composite coating including an organic silicon compound, one or two of a zirconium compound and a titanium compound, a phosphoric acid compound, a fluorine compound, and a vanadium compound, wherein, when a surface of the composite coating is analyzed at a spot size of φ30 μm using micro-fluorescent X-rays, a maximum value of V/Zn, which is a mass ratio of a V content to a Zn content, is 0.010 to 0.100.

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.