公开(公告)号：US11958268B2

公开(公告)日：2024-04-16

申请号：US16972286

申请日：2019-06-14

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuaki Kawamura ,  Kohei Ueda ,  Masumi Koori

IPC: B32B15/14 ,  B32B5/02 ,  B32B15/18 ,  C08K7/06 ,  C09D167/00 ,  C09D175/04

CPC classification number: B32B15/14 ,  B32B5/022 ,  B32B15/18 ,  C08K7/06 ,  C09D167/00 ,  C09D175/04 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2262/106

Abstract: To provide a metal-carbon fiber reinforced plastic material (CFRP) composite that has excellent adhesion and adhesion durability at a member interface and a method of producing a metal-CFRP composite.
The metal-CFRP composite according to the present invention includes: a metal member; a CFRP layer; and one or two layers of coating layers provided between the metal member and the CFRP layer. In the case where the coating layer consists of one layer, the coating layer is a coating layer containing an isocyanate group, and the matrix resin contains a phenoxy resin as a main component thereof, contains an epoxy group, and has bonds represented in (a structural formula 1) in the vicinity of an interface between the CFRP layer and the coating layer. In the case where the coating layer consists of two layers, the first coating layer that is located on the metal member side is a coating layer containing an isocyanate group, and the second coating layer that is located on the CFRP layer side is a coating layer that contains an epoxy resin as a main component thereof, and has bonds represented in (a structural formula 1) in the vicinity of an interface between the first coating layer and the second coating layer.

公开(公告)号：US11680303B2

公开(公告)日：2023-06-20

申请号：US16982003

申请日：2018-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Takafumi Yokoyama ,  Riki Okamoto ,  Kohichi Sano ,  Hiroyuki Kawata ,  Kohei Ueda ,  Eisaku Sakurada

IPC: C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  C23C2/06 ,  C23C2/40 ,  C22C38/00 ,  B32B15/01 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  C23C2/06 ,  C23C2/40 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009

Abstract: This steel sheet has a predetermined chemical composition, in which a steel structure of an inside of the steel sheet contains, by volume fraction, soft ferrite: 0% to 30%, retained austenite: 3% to 40%, fresh martensite: 0% to 30%, a sum of pearlite and cementite: 0% to 10%, and a remainder includes hard ferrite, a number proportion of the retained austenite having an aspect ratio of 2.0 or more in the total retained austenite is 50% or more, a soft layer having a thickness of 1 to 100 μm from a surface in a sheet thickness direction is present, in ferrite contained in the soft layer, a volume fraction of grains having an aspect ratio of 3.0 or more is 50% or more, a volume fraction of retained austenite in the soft layer is 80% or less of the volume fraction of the retained austenite in the inside of the steel sheet, and a peak of an emission intensity at a wavelength indicating Si appears in a range of more than 0.2 μm and 10.0 μm or less from the surface.

公开(公告)号：US11377710B2

公开(公告)日：2022-07-05

申请号：US16981653

申请日：2018-03-30

Applicant: NIPPON STEEL CORPORATION

Inventor： Takafumi Yokoyama ,  Kohichi Sano ,  Riki Okamoto ,  Hiroyuki Kawata ,  Eisaku Sakurada ,  Yuji Yamaguchi ,  Kazuki Shiokawa ,  Yuichi Nakahira ,  Kohei Ueda ,  Masahiro Nakata ,  Satoshi Uchida

IPC: C22C38/18 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/40 ,  C23C2/28 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/06 ,  C22C38/60 ,  C23C2/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/58 ,  C25D3/56 ,  C23C2/26 ,  C23C30/00 ,  B32B15/04 ,  B32B15/18 ,  C21D8/00 ,  C22C38/20 ,  C22C38/34 ,  C22C38/30 ,  C22C38/32 ,  C22C38/40 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/22 ,  C22C38/24 ,  C22C38/54

Abstract: A steel sheet has a chemical composition with a steel structure containing, by volume fraction, soft ferrite: 0-30%, retained austenite: 3-40%, fresh martensite: 0-30%, pearlite and cementite: 0-10%, and a remainder including hard ferrite. In the steel sheet, a number proportion of retained austenite having an aspect ratio of 2.0 or more in the total retained austenite is 50% or more, and a soft layer having a thickness of 1-100 μm is present. In the soft layer, a volume fraction of ferrite grains having an aspect ratio of less than 3.0 is 50% or more, and a volume fraction of retained austenite is 50% or more of the volume fraction of the retained austenite of the inside of the steel sheet. A peak of an emission intensity at a wavelength indicating Si appears in a range of more than 0.2 μm to 5 μm or less from the surface.

公开(公告)号：US10507629B2

公开(公告)日：2019-12-17

申请号：US15522409

申请日：2015-11-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyuki Kawata ,  Takeshi Yasui ,  Kohei Ueda ,  Naoki Maruyama ,  Yuji Yamaguchi ,  Satoshi Uchida ,  Ryosuke Komami ,  Hayato Arai ,  Yasuhiro Nakashima ,  Toyomitsu Nakamura

IPC: B32B15/01 ,  C23C2/06 ,  C23C2/40 ,  C21D9/46 ,  C22C38/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

Abstract: A hot-dip galvanized steel sheet wherein the hot-dip galvanized steel sheet comprises a base steel sheet and a hot-dip galvanized layer, a ferrite phase is, by volume fraction, 40% or more and 97% or less in a range of ⅛ thickness to ⅜ thickness centered at a position of ¼ thickness from the surface of the base steel sheet, a hard structure is 3% or more in total, wherein the hot-dip galvanized steel sheet has the hot-dip galvanized layer in which Fe is 5.0% or less and Al is 1.0% or less, and columnar grains formed of a ζ phase is 20% or more in an entire interface between the plated layer and the base steel sheet on the surface of the base steel sheet in which a ratio of a volume fraction of the hard structure in a surface layer range of 20 μm depth in a steel sheet direction from an interface between the hot-dip galvanized layer and the base steel sheet is 0.10 times or more to 0.90 times or less of a volume fraction of the hard structure in the range of ⅛ thickness to ⅜ thickness, and wherein the hot-dip galvanized steel sheet has a refined layer at the side of the interface in the base steel sheet, and wherein an average thickness of the refined layer, an average grain size of ferrite in the refined layer and a maximum size of the oxide included in the refined layer are defined respectively.

公开(公告)号：US10822684B2

公开(公告)日：2020-11-03

申请号：US15522243

申请日：2015-11-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyuki Kawata ,  Takeshi Yasui ,  Kohei Ueda ,  Naoki Maruyama ,  Yuji Yamaguchi ,  Satoshi Uchida ,  Ryosuke Komami ,  Hayato Arai ,  Toyomitsu Nakamura

IPC: B32B15/01 ,  C23C2/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C21D9/46 ,  C21D8/02 ,  C22C38/58 ,  C23C2/02 ,  C23C2/28 ,  C22C38/16

Abstract: A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ζ phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ζ phase, and a ratio of an interface formed between ζ grains in which coarse oxides are present among ζ grains and the base steel sheet with respect to the entire interface between the ζ phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.0 μm, an average grain size of ferrite in the refined layer is 0.1 to 3.0 μm, one or two or more of oxides of Si and Mn are contained in the refined layer, and a maximum size of the oxide is 0.01 to 0.4 μm.

公开(公告)号：US11969969B2

公开(公告)日：2024-04-30

申请号：US17599914

申请日：2019-04-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Kohei Ueda ,  Yasuaki Kawamura ,  Masumi Koori ,  Masaharu Ibaragi

IPC: B32B15/14 ,  B32B15/08 ,  C08J5/12 ,  C08J5/24 ,  C23C2/26

CPC classification number: B32B15/14 ,  B32B15/08 ,  C08J5/121 ,  C08J5/243 ,  C08J5/249 ,  C23C2/26 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2262/106 ,  B32B2264/102 ,  B32B2307/202 ,  C08J2371/10

Abstract: What is provided is a new and improved metal-carbon fiber reinforced resin material composite in which the galvanic corrosion of dissimilar materials of a metal member is suppressed and electrodeposition coatability is excellent and a method for manufacturing the metal-carbon fiber reinforced resin material composite. A metal-carbon fiber reinforced resin material composite according to the present invention has a metal member, a resin coating layer disposed on at least a part of a surface of the metal member, and a carbon fiber reinforced resin material containing a matrix resin and a carbon fiber material present in the matrix resin, the resin coating layer contains any one or more kinds selected from the group consisting of metal particles, intermetallic compound particles, conductive oxide particles, and conductive non-oxide ceramic particles as conductive particles and further contains a binder resin, and the conductive particles have a powder resistivity at 23° C. to 27° C. of 7.0×107 Ω·cm or less and contain one or more selected from the group consisting of Zn, Si, Zr, V, Cr, Mo, Mn, and W.

公开(公告)号：US11667107B2

公开(公告)日：2023-06-06

申请号：US17599985

申请日：2019-04-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasuaki Kawamura ,  Kohei Ueda ,  Masumi Koori

IPC: B32B7/12 ,  B32B15/14

CPC classification number: B32B7/12 ,  B32B15/14 ,  B32B2255/06 ,  B32B2255/26 ,  B32B2260/021 ,  B32B2260/046 ,  B32B2262/106

Abstract: This metal-carbon fiber reinforced resin material composite includes a metal member, a coating layer that is disposed on at least a part of a surface of the metal member and contains a resin, a carbon fiber reinforced resin material layer that is disposed on at least a part of a surface of the coating layer and contains a matrix resin and a carbon fiber material that is present in the matrix resin, and an electrodeposition film disposed so as to cover at least all of surfaces of the carbon fiber reinforced resin material layer, an interface between the metal member and the coating layer, and an interface between the coating layer and the carbon fiber reinforced resin material layer, in which an average film thickness A of the electrodeposition film formed on the surface of the carbon fiber reinforced resin material layer is 0.3 to 1.4 μm, and, at the time of immersing the metal-carbon fiber reinforced resin material composite in a 5 mass % sodium chloride aqueous solution with the electrodeposition film removed, an alternating impedance at a frequency of 1 Hz is 1×107Ω to 1×109Ω.

公开(公告)号：US12173128B2

公开(公告)日：2024-12-24

申请号：US17601230

申请日：2020-04-16

Applicant: NIPPON STEEL CORPORATION

Inventor： Masumi Koori ,  Kohei Ueda ,  Atsuo Koga ,  Masaharu Ibaragi ,  Noriyuki Negi ,  Masafumi Usui

IPC: C08J5/04 ,  B32B15/14 ,  B32B15/18 ,  B32B15/20 ,  C25D1/00 ,  B32B15/08 ,  B32B37/04

Abstract: The invention has as its object the provision of a metal-fiber reinforced plastic composite able to more reliably prevent occurrence of an electrolytic corrosion action when forming a composite of a metal member and a fiber reinforced plastic layer comprising reinforcing fiber (carbon fiber) and a matrix resin.
A metal-fiber reinforced plastic composite 1 according to the present invention comprises a metal member 10, an insulating layer 30 arranged on at least part of a surface of the metal member 10 and comprising a first matrix resin 31 containing nonconductive fiber 32, and a CFRP layer 40 arranged on at least part of a surface of the insulating layer 30 and comprising a second matrix resin 41 containing carbon fiber 42, wherein, when viewing the surface of the metal member 10 from vertically above, the CFRP layer 40 is positioned at the inside of a region where the insulating layer 30 is present and an outer edge of the CFRP layer 40 and an outer edge of the insulating layer 30 are 0.2 mm or more apart. Due to this, it is possible to prevent electrolytic corrosion of the metal member.

公开(公告)号：US10822683B2

公开(公告)日：2020-11-03

申请号：US15521535

申请日：2015-11-05

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyuki Kawata ,  Takeshi Yasui ,  Kohei Ueda ,  Naoki Maruyama ,  Yuji Yamaguchi ,  Satoshi Uchida ,  Ryosuke Komami ,  Hayato Arai ,  Toyomitsu Nakamura

IPC: B32B15/01 ,  C23C2/06 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/08 ,  C22C38/18 ,  C21D9/46 ,  C21D8/02 ,  C22C38/58 ,  C23C2/02 ,  C23C2/28 ,  C22C38/16

Abstract: A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ζ phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ζ phase, and a ratio of an interface formed between ζ grains in which coarse oxides are present among grains and the base steel sheet with respect to the entire interface between the ζ phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.0 μm, an average grain size of ferrite in the refined layer is 0.1 to 3.0 μm, one or two or more of oxides of Si and Mn are contained in the refined layer, and a maximum size of the oxide is 0.01 to 0.4 μm, and a volume fraction of residual austenite in a range of ⅛ thickness to ⅜ thickness centered at a position of ¼ thickness from the surface of the base steel sheet is 1% or more.

公开(公告)号：US12110428B2

公开(公告)日：2024-10-08

申请号：US17279933

申请日：2019-09-27

Applicant: NIPPON STEEL CORPORATION

Inventor： Masumi Koori ,  Kohei Ueda ,  Atsushi Morishita ,  Atsuo Koga

IPC: B32B3/10 ,  B32B15/09 ,  B32B15/092 ,  B32B15/095 ,  B32B15/18 ,  C09J5/10

CPC classification number: C09J5/10 ,  B32B15/09 ,  B32B15/092 ,  B32B15/095 ,  B32B15/18 ,  B32B2605/00

Abstract: This adhesively joined structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion includes an organic resin phase containing one or more of a urethane group, an epoxy group, and an ester group; an organic compound phase formed of an organic silicon compound; and optionally an inorganic compound phase formed of an inorganic silicon compound. The total volume percentage of the organic compound phase and the inorganic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the organic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the inorganic compound phase to the total volume of the film portion is limited to 10 vol % or less. The organic silicon compound includes a Si—C bond; and a Si—O bond or a Si—OH bond or a a combination thereof.