公开(公告)号：US20250109474A1

公开(公告)日：2025-04-03

申请号：US18838856

申请日：2023-02-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei TOKUDA ,  Mamoru SAITO ,  Yasuto GOTO ,  Fumiaki NAKAMURA

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

Abstract: A hot-dip plated steel material has a plating layer on a surface of a steel material, in which the plating layer contains Al: more than 22.5% and 50.0% or less, Mg: more than 3.0% and 15.0% or less, Ca: 0.03 to 0.6%, Si: 0.03 to 1.0%, Fe: 2 to 25%, and a remainder consisting of Zn and impurities, and, in an X-ray diffraction pattern of a surface of the plating layer, measured under conditions in which an X-ray output is a voltage of 50 kV and a current of 300 mA using a Cu-Kα ray, I1 obtained from an X-ray diffraction peak of Al0.5Fe1.5 is 1.1 or more, and I2 obtained from X-ray diffraction peaks of Zn, Al, and MgZn2 is 0.25 or less.

公开(公告)号：US20240183013A1

公开(公告)日：2024-06-06

申请号：US18285516

申请日：2022-03-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Kosuke KAWAMOTO ,  Yasuto GOTO ,  Masaharu OKA ,  Yuta DAIROKUNO ,  Yuji KAJII ,  Koki SHIMADA

IPC: C22C38/04 ,  C22C38/00 ,  C22C38/06 ,  C25D3/12 ,  C25D5/12 ,  C25D5/50

CPC classification number: C22C38/04 ,  C22C38/002 ,  C22C38/06 ,  C25D3/12 ,  C25D5/12 ,  C25D5/50

Abstract: A surface-treated steel sheet is provided that has excellent strength even when the surface-treated steel sheet is provided with a Ni—Co—Fe alloy layer. A surface-treated steel sheet of the present disclosure includes a steel sheet, and a Ni—Co—Fe alloy layer on a steel sheet surface. The steel sheet has a microstructure containing: ferrite, and one or more kinds selected from the group consisting of cementite, pearlite, and bainite having an area fraction of 1.2 to 5.0% in total. The Ni—Co—Fe alloy layer contains Ni, Co and Fe.

公开(公告)号：US20240167184A1

公开(公告)日：2024-05-23

申请号：US18284561

申请日：2022-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Kosuke KAWAMOTO ,  Yasuto GOTO ,  Katsumasa MATSUMOTO ,  Tatsuo NAGATA

IPC: C25D5/14 ,  C25D3/12 ,  C25D7/06

CPC classification number: C25D5/14 ,  C25D3/12 ,  C25D7/0614

Abstract: A surface-treated steel sheet according to one embodiment of the present invention includes a base steel sheet and a plating layer containing Ni and W which is provided on the surface of the base steel sheet, and in a region from the outmost surface of the plating layer to a depth of 150 nm, a proportion (unit atomic %) of the average W concentration with respect to a total of the average Ni concentration, the average W concentration, and the average Fe concentration is 2.0 to 20.0 atomic %, and in a region of the plating layer from a depth of 150 nm to a depth of 300 nm, the proportion (unit atomic %) of the average W concentration with respect to the total of the average Ni concentration, the average W concentration, and the average Fe concentration is 0.7 times or less the proportion in the region from the outmost surface of the plating layer to a depth of 150 nm.

公开(公告)号：US20230407510A1

公开(公告)日：2023-12-21

申请号：US18035745

申请日：2021-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuto GOTO ,  Kosuke KAWAMOTO ,  Yuta DAIROKUNO ,  Yuji KAJII ,  Koki SHIMADA

IPC: C25D5/50 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C21D1/74 ,  C25D3/12 ,  C25D3/56 ,  C25D5/12

CPC classification number: C25D5/50 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/004 ,  C22C38/002 ,  C22C38/001 ,  C21D9/46 ,  C21D8/0205 ,  C21D8/0221 ,  C21D8/0278 ,  C21D6/005 ,  C21D6/008 ,  C21D1/74 ,  C25D3/12 ,  C25D3/562 ,  C25D5/12 ,  C21D2251/02

Abstract: A surface-treated steel sheet includes a steel sheet, and an Ni—Co—Fe alloy layer containing Ni, Co, and Fe on the steel sheet surface. In the thickness direction of the Ni—Co—Fe alloy layer, a Co concentration in the Ni—Co—Fe alloy layer is highest at a position which is on an outermost surface side of the Ni—Co—Fe alloy layer relative to a position where the Ni concentration is highest in the Ni—Co—Fe alloy layer, and which is between the outermost surface of the Ni—Co—Fe alloy layer and a depth of 100 nm from the outermost surface. In the Ni—Co—Fe alloy layer, an Ni-concentrated region in which the Ni concentration increases toward the outermost surface of the Ni—Co—Fe alloy layer is formed between the outermost surface of the Ni—Co—Fe alloy layer and the position where the Co concentration is highest.

公开(公告)号：US20230304136A1

公开(公告)日：2023-09-28

申请号：US18033739

申请日：2021-11-18

Applicant: NIPPON STEEL CORPORATION

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

IPC: C23C2/06 ,  C22C18/04

CPC classification number: C23C2/06 ,  C22C18/04

Abstract: The plated steel material is a plated steel material including a steel material and a plating layer provided on the surface of the steel material, wherein the plating layer has a predetermined average chemical composition, when the amount of Mg is % Mg and the amount of Al is % Al, % Mg/% Al is 0.80 or more, and a metal structure in a total field of view of 25,000 μm2 in a vertical cross section which is a cross section in a thickness direction of the plating layer includes 10 to 40 area % of a MgZn2 phase, 10 to 30 area % of an Al—Zn phase with a Zn content of 10% or more, 0 to 15 area % of an Al phase with a Zn content of less than 10%, and 25 area % or more of an Al/MgZn2/Zn ternary eutectic structure.

公开(公告)号：US20220403539A1

公开(公告)日：2022-12-22

申请号：US17776465

申请日：2019-12-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuto GOTO ,  Kiyokazu ISHIZUKA ,  Takehiro TAKAHASHI

IPC: C25D3/12 ,  C21D9/46 ,  C22C38/08 ,  C25D5/50

Abstract: A Ni-plated steel sheet includes a base steel sheet and a Ni-based coating layer that is disposed on a surface of the base steel sheet. The distribution of carbon concentration in a depth direction obtained by performing GDS analysis on the Ni-plated steel sheet has a peak indicating the carbon concentration that is equal to or more than twice the carbon concentration of a thickness middle portion of the base steel sheet in the vicinity of an interface between the base steel sheet and the Ni-based coating layer.

公开(公告)号：US20210269932A1

公开(公告)日：2021-09-02

申请号：US17254714

申请日：2019-07-05

Applicant: NIPPON STEEL CORPORATION

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

IPC: C25D5/12 ,  C25D3/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  H01M50/119 ,  H01M50/124

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 18.5 g/m2, a Co coating weight is 0.65 to 3.6 g/m2, and a total of the Ni coating weight and the Co coating weight is in a range of 9.0 to 20.0 g/m2. In a surface 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. The base steel sheet has a predetermined chemical composition, and a ferrite grain size number is 10 or more.

公开(公告)号：US20190390303A1

公开(公告)日：2019-12-26

申请号：US16480967

申请日：2018-01-26

Applicant: NIPPON STEEL CORPORATION

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

IPC: C22C18/04 ,  B32B15/01 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

Abstract: There is provided a coated steel product having 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 has a Zn phase, the Zn phase contains a Mg—Sn intermetallic compound phase, and the coating layer consists of Zn: more than 65.0%, Al: from more than 5.0% to less than 25.0%, Mg: from more than 3.0% to less than 12.5%, Sn: 0.1% to 20.0% in terms of percent (%) by mass, given amounts of optional elements, and impurities, and has a chemical composition that satisfies the following Formulas 1 to 5: Bi+In

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