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公开(公告)号：US20250109473A1
公开(公告)日：2025-04-03
申请号：US18848434
申请日：2023-06-09
Applicant: NIPPON STEEL CORPORATION
Inventor： Tetsuya TOBA , Yasuaki KAWAMURA , Jun NAKAGAWA , Shintaro UEMURA , Tomohito TANAKA
Abstract: A hot-dip plated steel sheet includes a hot-dip plated layer formed on a surface of a steel sheet, the hot-dip plated layer contains 4 to 22 mass % of Al and 1.0 to 10 mass % of Mg with a remainder including Zn and impurities, a pattern portion and a non-pattern portion are formed in the hot-dip plated layer, an element concentrated region containing an element M and an interface alloy layer containing Fe and Al are present at an interface between the steel sheet and the hot-dip plated layer in the pattern portion, an average concentration of the element M contained in the hot-dip plated layer present in the pattern portion and the element concentrated region is 0.0010 to 2 mass %, and in the element concentrated region, the element M is concentrated two or more times the hot-dip plated layer present in the pattern portion, or the element M is unevenly distributed.
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公开(公告)号：US20230235437A1
公开(公告)日：2023-07-27
申请号：US18007650
申请日：2021-03-19
Applicant: NIPPON STEEL CORPORATION
Inventor： Tetsuya TOBA , Atsushi MORISHITA , Yusuke KOHIGASHI , Shinichi YAMAGUCHI , Takuya MITSUNOBU
CPC classification number: C23C2/06 , C22C18/04 , B32B15/013 , C23C2/40 , C23C2/29
Abstract: This hot-dip Zn—Al—Mg-based plated steel includes: a steel; and a plating layer formed on a surface of the steel, in which the plating layer contains, as an average composition, Mg: 1 to 10 mass %, Al: 4 to 22 mass %, and a remainder consisting of Zn and impurities, the plating layer includes an (Al—Zn mixed structure) in an area ratio of 10% to 70% in a cross section of the plating layer in a matrix of an (Al/Zn/MgZn2 ternary eutectic structure), the (Al—Zn mixed structure) includes a first region that has a Zn concentration in a range of 75 mass % or more and less than 85 mass % and a second region that is present inside the first region and has a Zn concentration in a range of 67 mass % or more and less than 75 mass %, and an area ratio of the second region in the (Al—Zn mixed structure) in the cross section of the plating layer is more than 0% and 40% or less.
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公开(公告)号：US20200232077A1
公开(公告)日：2020-07-23
申请号：US16487797
申请日：2018-03-23
Applicant: NIPPON STEEL CORPORATION
Inventor： Shinichi YAMAGUCHI , Jun MAKI , Soshi FUJITA , Shintaro YAMANAKA , Michiko KONNO , Tetsuya TOBA
Abstract: A sheet includes: a base; an Al-plating layer on at least one of opposite surfaces of the base; an intermediate coating layer on a surface of the Al-plating layer; and a surface coating layer formed on a surface of the intermediate coating layer and containing ZnO particles with a mean particle size of 0.10 μm or more and 5.00 μm or less and an organic resin such that an amount of coating of the ZnO particles is 0.5 g/m2 or more and 10.0 g/m2 or less in terms of metallic zinc.
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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
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