公开(公告)号：US20200238357A1

公开(公告)日：2020-07-30

申请号：US16651229

申请日：2018-09-28

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahiro KUBO ,  Yoshiaki NAKAZAWA ,  Toshiya SUZUKI ,  Naruhiko NOMURA ,  Soshi FUJITA ,  Hideaki IRIKAWA ,  Masahiro FUDA

IPC: B21D22/20 ,  B32B15/04 ,  B21D24/04 ,  C23C2/12 ,  B32B9/04

Abstract: Provided is a coated steel sheet including a steel sheet, a first aluminum coating layer provided on a first surface of the steel sheet, a zinc compound layer or a metallic zinc layer provided on a surface of the first aluminum coating layer, and a second aluminum coating layer provided on a second surface of the steel sheet, as an outermost surface of the steel sheet. Further provided are a coated steel sheet coil using this coated steel sheet, and a method of producing a hot-press formed article, as well as an automobile part using a press formed article produced by the method of producing a hot-press formed article.

公开(公告)号：US20240091842A1

公开(公告)日：2024-03-21

申请号：US17768161

申请日：2019-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Yuki SUZUKI ,  Soshi FUJITA ,  Jun MAKI ,  Kazuhisa KUSUMI ,  Masahiro FUDA

IPC: B21D35/00 ,  C23C2/12

CPC classification number: B21D35/007 ,  C23C2/12

Abstract: A plated steel sheet for hot stamping according to one aspect of the present invention includes a steel sheet, a plating layer formed on either surface or both surfaces of the steel sheet and having an Al content of 60 mass % or more, and a surface film layer formed on the plating layer. A thickness t of the plating layer is 10 to 60 μm. An average crystal grain diameter of the plating layer in a thickness range from an interface between the plating layer and the surface film layer to a position at ⅔ of the thickness t is 2t/3 or less and 15.0 μm or less. A surface film layer contains particles containing one or more elements selected from A group elements consisting of Sc, V, Mn, Fe, Co, Ce, Nb, Mo, and W. A total content of the A group elements is 0.01 to 10.0 g/m2. An average grain diameter of the particles containing the A group elements is 0.05 to 3.0 μm.

公开(公告)号：US20230416888A1

公开(公告)日：2023-12-28

申请号：US18463110

申请日：2023-09-07

Applicant: NIPPON STEEL CORPORATION

Inventor： Jun MAKI ,  Soshi FUJITA ,  Toyomitsu NAKAMURA

IPC: C22C38/54 ,  B23K11/00 ,  B23K35/02 ,  B23K35/30 ,  C21D9/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C25D3/44 ,  C25D7/04

CPC classification number: C22C38/54 ,  B23K11/002 ,  B23K35/0261 ,  B23K35/3053 ,  C21D9/08 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C25D3/44 ,  C25D7/04 ,  B23K2103/04

Abstract: An Al plated electric resistance welded steel pipe for hardening use suppressing the formation of scale to the inside of the plating layer while performing hot forming and an Al plated hollow member using that Al plated electric resistance welded steel pipe, wherein the Al plated electric resistance welded steel pipe for hardening use is comprised of a base material made of a tubular steel plate and having a predetermined chemical composition and an electric resistance welded zone provided at a seam portion of the steel plate and extending in a longitudinal direction of the steel plate, the base material is further provided with an intermetallic compound layer positioned on the surface of the steel plate and including an Al—Fe—Si-based intermetallic compound and an Al plating layer positioned on the surface of the intermetallic compound layer and containing Al and Si, and 70×X/D≤Y/t≤30 is satisfied, wherein X (μm) is a thickness of the intermetallic compound layer, Y (μm) is a thickness of the Al plating layer, t (mm) is a pipe thickness of the steel pipe, and D (mm) is an outside diameter of the steel pipe.

公开(公告)号：US20230138051A1

公开(公告)日：2023-05-04

申请号：US17910289

申请日：2021-03-24

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinichi YAMAGUCHI ,  Soshi FUJITA

IPC: C23C22/12 ,  B32B15/01 ,  C23C28/00 ,  C23C2/12 ,  C23C22/78

Abstract: Provided is an Al-plated hot stamped steel material comprising a steel base material, an Al-plating layer formed on at least one surface of the steel base material, and a chemical conversion coating formed on the Al-plating layer and containing zinc phosphate-based crystals and Ce-based compounds deposited on the surfaces of the zinc phosphate-based crystals, wherein an amount of deposition of the zinc phosphate-based crystals in the chemical conversion coating is, converted to metal Zn, 0.3 to 4.0 g/m2 and an area ratio of the Ce-based compounds in the chemical conversion coating is 0.5 to 25%.

公开(公告)号：US20230116894A1

公开(公告)日：2023-04-13

申请号：US17914389

申请日：2020-05-18

Applicant: NIPPON STEEL CORPORATION

Inventor： Michiko KONNO ,  Jun MAKI ,  Shinichi YAMAGUCHI ,  Soshi FUJITA

IPC: C21D8/02 ,  C22C38/54 ,  C22C38/44 ,  C22C38/42 ,  C22C38/50 ,  C22C38/06 ,  C22C38/04 ,  C23C28/00 ,  C21D9/46

Abstract: Provided is a hot stamped body comprising a steel base material, an Al-plating layer formed on at least one surface of the steel base material, a coating formed on the Al-plating layer and containing ZnO particles and CeO2 particles having an average particle size smaller than an average particle size of the ZnO particles, and a Zn- and Al-containing complex oxide layer formed between the Al-plating layer and the coating. Further, provided is a method for producing a hot stamped body comprising forming an Al-plating layer on at least one side of a steel sheet, coating a surface of the Al-plating layer with an aqueous solution containing ZnO particles and CeO2 particles, then heating it to form a coating containing ZnO particles and CeO2 particles on the Al-plating layer, and hot pressing the steel sheet. Further, provided is an Al-plated steel sheet comprising a steel base material, an Al-plating layer formed on at least one surface of the steel base material, and a coating formed on the Al-plating layer and containing ZnO particles and CeO2 particles having an average particle size smaller than an average particle size of the ZnO particles.

公开(公告)号：US20220025498A1

公开(公告)日：2022-01-27

申请号：US17296897

申请日：2019-11-29

Applicant: NIPPON STEEL CORPORATION

Inventor： Yuki SUZUKI ,  Soshi FUJITA ,  Masahiro FUDA ,  Hideaki IRIKAWA ,  Takeshi IMAI ,  Fumio EIHARA

IPC: C22C38/58 ,  C22C38/02 ,  C22C38/06 ,  C22C38/54 ,  C22C38/42 ,  C22C38/50 ,  C22C38/48 ,  C22C38/00 ,  C25D1/04 ,  B21D22/02

Abstract: This aluminum-plated steel sheet has a steel sheet and a plating layer formed on a surface of the steel sheet, the plating layer contains one or more A group elements selected from a group consisting of Be, Mg, Ca, Sr, Ba, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn, a remainder of Al, Fe, and impurities, a thickness t of the plating layer is 10 to 60 μm, and an average grain size is 2t/3 or less and 15 μm or less in a thickness range from an outermost surface of the plating layer to a ⅔ thickness t position.

公开(公告)号：US20200347489A1

公开(公告)日：2020-11-05

申请号：US16753961

申请日：2017-11-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Jun MAKI ,  Soshi FUJITA ,  Toyomitsu NAKAMURA

IPC: C22C38/54 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/08 ,  B23K35/30 ,  B23K35/02 ,  C25D3/44 ,  C25D7/04 ,  B23K11/00

Abstract: An Al plated electric resistance welded steel pipe for hardening use suppressing the formation of scale to the inside of the plating layer while performing hot forming and an Al plated hollow member using that Al plated electric resistance welded steel pipe, wherein the Al plated electric resistance welded steel pipe for hardening use is comprised of a base material made of a tubular steel plate and having a predetermined chemical composition and an electric resistance welded zone provided at a seam portion of the steel plate and extending in a longitudinal direction of the steel plate, the base material is further provided with an intermetallic compound layer positioned on the surface of the steel plate and including an Al-Fe-Si-based intermetallic compound and an Al plating layer positioned on the surface of the intermetallic compound layer and containing Al and Si, and 70×X/D≤Y/t≤30 is satisfied, wherein X (μm) is a thickness of the intermetallic compound layer, Y (μm) is a thickness of the Al plating layer, t (mm) is a pipe thickness of the steel pipe, and D (mm) is an outside diameter of the steel pipe.

公开(公告)号：US20200271247A1

公开(公告)日：2020-08-27

申请号：US16758244

申请日：2018-11-08

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroki FUJIMOTO ,  Masanori YASUYAMA ,  Yujiro TATSUMI ,  Tasuku ZENIYA ,  Hiroshi FUKUCHI ,  Yuki SUZUKI ,  Soshi FUJITA ,  Shintaro KOBAYASHI

IPC: F16L9/17 ,  B32B15/01 ,  C22C38/38 ,  C22C38/32 ,  C22C38/28 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/08 ,  C21D6/00 ,  F16L13/02 ,  B21D35/00

Abstract: This steel sheet includes a first coated portion in which an intermetallic compound layer and an aluminum coating layer are provided on a surface of a base steel sheet in order from the base steel sheet, the first exposed portion in which the base steel sheet is exposed, and a second coated portion in which the intermetallic compound layer and the aluminum coating layer are provided on the surface of the base steel sheet in order from the base steel sheet, in which in a first direction which is perpendicular to a thickness direction of the steel sheet and is directed from the first coated portion to one end edge of the steel sheet, the first coated portion, the first exposed portion, the second coated portion, and the end edge of the steel sheet are disposed in this order on at least one surface of the base steel sheet, and wherein at least the first coated portion, the first exposed portion, and the end edge of the steel sheet are disposed in this order on the other surface of the base steel sheet in the first direction.

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

IPC: C22C38/50 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C23C2/12 ,  C23C2/26 ,  C23C28/00

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.

公开(公告)号：US20200024748A1

公开(公告)日：2020-01-23

申请号：US16474512

申请日：2017-12-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Masahiro KUBO ,  Yoshiaki NAKAZAWA ,  Toshiya SUZUKI ,  Narihiko NOMURA ,  Soshi FUJITA ,  Hideaki IRIKAWA

IPC: C23C28/02 ,  C22C38/00 ,  C23C2/12 ,  C23C2/06 ,  C23C22/66 ,  B21D22/00

Abstract: Provided are a plated steel sheet for hot stamping including: a plated steel sheet body including a steel sheet and an aluminum plating layer provided on one side or both sides of the steel sheet; and a zinc-based metal soap film provided on a surface of the plated steel sheet body on a side of the aluminum plating layer and having an adhesion amount of from 7.1 to 19.8 g/m2 based on a Zn amount (when, in the plated steel sheet body, a zinc oxide film is on the surface of an aluminum plating layer, the total adhesion amount of the zinc oxide film and the zinc-based metal soap film is from 7.1 to 19.8 g/m2 based on a Zn amount.), and a method of manufacturing such a sheet. Also provided are a method of manufacturing a hot-stamped component using the plated steel sheet for hot stamping, and a method of manufacturing a vehicle using a stamped component manufactured by a method of manufacturing a hot-stamped component.