公开(公告)号：US11781200B2

公开(公告)日：2023-10-10

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：US11473174B2

公开(公告)日：2022-10-18

申请号：US16477987

申请日：2017-01-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei Tokuda ,  Hisashi Baba ,  Nobuyuki Shimoda ,  Kenichiro Matsumura ,  Yasuto Goto

IPC: C22C21/06 ,  C23C2/12 ,  C23C28/02

Abstract: The present invention provides a coated steel product including: a steel product; a coating layer that is coated on the surface of the steel product and that includes from 8 to 50% by mass of Mg, from 2.5 to 70.0% by mass of Al, and from 0.30 to 5.00% by mass of Ca, with the balance consisting of Zn and impurities; and an intermediate layer interposed between the steel product and the coating layer, in which the intermediate layer has a sea-island structure constituted by a sea portion composed of an Al—Fe alloy phase, and island portions including a Zn—Mg—Al alloy phase having a Mg content of 8% by mass or more, and in which the sea portion composed of the Al—Fe alloy phase has an area fraction of from 55 to 90%.

公开(公告)号：US12252802B2

公开(公告)日：2025-03-18

申请号：US18036877

申请日：2021-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Kosuke Kawamoto ,  Yasuto Goto ,  Yuta Dairokuno ,  Koki Shimada

IPC: C25D5/12 ,  C21D9/46 ,  C25D3/12 ,  C25D5/36 ,  C25D5/50

Abstract: A surface-treated steel sheet of the present disclosure includes a steel sheet, and an alloy layer containing Ni and Co on a surface of the steel sheet. A surface roughness Ra1 of the surface of the alloy layer over a sampling length of 5.0 mm in the width direction of the steel sheet is 2.0 μm or less. Ra2 that denotes the arithmetic mean height of a roughness curve of the surface of the alloy layer over a sampling length of 10 μm in the width direction of the steel sheet is 20 nm or less, and RSm that denotes the mean length of roughness curve elements over the sampling length of 10 μm in the width direction of the steel sheet is 700 nm or more, Ra2 and RSm being measured using an atomic force microscope.

公开(公告)号：US12180564B2

公开(公告)日：2024-12-31

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

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：US12031225B2

公开(公告)日：2024-07-09

申请号：US17046674

申请日：2019-04-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Takehiro Takahashi ,  Kiyokazu Ishizuka ,  Yasuto Goto

IPC: C25D5/50 ,  B32B15/01 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C25D3/12 ,  C25D7/06 ,  H01M50/10 ,  H01M50/119 ,  H01M50/124 ,  H01M50/145

CPC classification number: C25D5/50 ,  B32B15/015 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C25D3/12 ,  C25D7/0614 ,  H01M50/10 ,  H01M50/119 ,  H01M50/124 ,  H01M50/1245 ,  H01M50/145

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, an Ni coating weight of the Fe—Ni diffusion alloy-plating layer is 9.0 to 20 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 11.0 or more.

公开(公告)号：US11827996B2

公开(公告)日：2023-11-28

申请号：US17044678

申请日：2019-04-12

Applicant: NIPPON STEEL CORPORATION

Inventor： Takehiro Takahashi ,  Kiyokazu Ishizuka ,  Yasuto Goto

IPC: C25D5/50 ,  C21D9/46 ,  B32B15/01 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C25D3/12 ,  C25D7/00 ,  H01M50/145

CPC classification number: C25D5/50 ,  B32B15/015 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C25D3/12 ,  C25D7/00 ,  H01M50/145

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：US11787156B2

公开(公告)日：2023-10-17

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 ,  C23C28/02 ,  C23C2/02 ,  C23C2/26 ,  C23C2/28 ,  C23C30/00 ,  C22C18/00 ,  B32B15/18 ,  C23C28/00 ,  B32B15/04

CPC classification number: B32B15/013 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C22C18/00 ,  C22C18/04 ,  C23C2/02 ,  C23C2/024 ,  C23C2/0222 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C23C28/02 ,  C23C28/021 ,  C23C28/023 ,  C23C28/025 ,  C23C28/3225 ,  C23C30/00 ,  C23C30/005 ,  Y10T428/12792 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12958 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

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：US10982303B2

公开(公告)日：2021-04-20

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：US12187009B2

公开(公告)日：2025-01-07

申请号：US18035988

申请日：2021-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Kosuke Kawamoto ,  Yasuto Goto

IPC: B32B15/01 ,  C21D1/74 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C18/32 ,  C25D3/12

Abstract: The surface-treated steel sheet includes an alloy layer containing Ni and Co. In a case where, in a cross section obtained by cutting the alloy layer in the thickness direction, a range having a width of 2000 nm and extending from the surface of the alloy layer to a depth of 100 nm is partitioned into regions each having a width of 100 nm and a depth of 100 nm, within the range the alloy layer includes a plurality of high Co concentration regions in each of which the ratio of a Co concentration to a sum of the Co concentration and a Ni concentration within the partitioned region is 0.8 or more, and a plurality of alloyed regions in each of which a ratio of the Co concentration to a sum of the Co concentration and the Ni concentration within the partitioned region is less than 0.8.

公开(公告)号：US12116688B2

公开(公告)日：2024-10-15

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

CPC classification number: 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.