公开(公告)号：US11365848B2

公开(公告)日：2022-06-21

申请号：US16323024

申请日：2017-08-01

Applicant: JFE STEEL CORPORATION

Inventor： Hiroshi Okano ,  Shusaku Takagi

IPC: C21D9/08 ,  F17C1/02 ,  C22C38/06 ,  C22C38/58 ,  C22C38/00 ,  F16J12/00 ,  C21D8/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

Abstract: A composite pressure vessel liner suitable for use in a composite pressure vessel for storing high-pressure hydrogen is provided. The composite pressure vessel liner is made of a steel material including: a predetermined chemical composition; and a metallic microstructure in which an area fraction of martensite at a position of ¼ of a wall thickness on an inner side is 30% or more, a total area fraction of martensite and bainite at the position of ¼ of the wall thickness on the inner side is 95% or more, and a total area fraction of martensite and bainite in a wall thickness center part is 95% or more, wherein the composite pressure vessel liner has a wall thickness of 20 mm or more in a longitudinal center part, and a tensile strength of 850 MPa or more in the wall thickness center part.

公开(公告)号：US20240150862A1

公开(公告)日：2024-05-09

申请号：US18281812

申请日：2022-03-16

Applicant: JFE Steel Corporation

Inventor： Kazuki Matsubara ,  Shusaku Takagi ,  Hiroshi Okano

IPC: C21D9/14 ,  C21D8/10 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D9/14 ,  C21D8/105 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/001

Abstract: A steel pipe for high-pressure hydrogen, the steel pipe having a chemical composition containing, by mass %, C: 0.05% to 0.60%, Si: 0.001% to 2.0%, Mn: 0.01% to 5.0%, P: 0.030% or less, S: 0.010% or less, N: 0.010% or less, Al: 0.0001% to 1.00%, 0: 0.010% or less, H: 0.00010% or less, and a balance of Fe and incidental impurities and a metallic microstructure including, in terms of area fraction, 3% or less (including 0%) of retained austenite, in which the number of inclusions having an aspect ratio of 2.0 or more and a length of 10 μm or more is 15/100 mm2 or less.

公开(公告)号：US11168375B2

公开(公告)日：2021-11-09

申请号：US16333339

申请日：2017-08-08

Applicant: JFE STEEL CORPORATION

Inventor： Hiroshi Okano ,  Shusaku Takagi

IPC: C21D6/00 ,  C21D7/12 ,  C21D8/10 ,  C21D9/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/44 ,  C22C38/58 ,  F17C1/00 ,  F17C13/00

Abstract: A steel pipe or tube for pressure vessels having excellent quench crack resistance is provided. The steel pipe or tube for pressure vessels comprises: a specific chemical composition; and a metallic microstructure in which an average grain size of prior austenite grains is 500 μm or less, and an area fraction of microstructures other than ferrite is 50% or more.

公开(公告)号：US10697036B2

公开(公告)日：2020-06-30

申请号：US15556066

申请日：2016-03-07

Applicant: JFE STEEL CORPORATION

Inventor： Shusaku Takagi ,  Akihide Nagao ,  Mitsuo Kimura ,  Hiroshi Okano

IPC: C22C38/44 ,  C22C38/38 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  F17C1/00 ,  C21D6/00 ,  C21D9/08 ,  C21D8/10 ,  C21D7/12 ,  C22C38/12 ,  C22C38/04 ,  C22C38/18 ,  C22C38/22 ,  C22C38/58 ,  F16L9/00 ,  F16L9/18 ,  C22C38/08 ,  F16L9/02 ,  C22C38/40 ,  B32B15/01 ,  B32B15/04 ,  B32B15/00 ,  B32B15/18 ,  B32B1/08

Abstract: Steel material for composite pressure vessel liners that, when used as raw material for manufacturing a composite pressure vessel liner, yields a liner having sufficient strength and a high fatigue limit and enables the manufacture of an inexpensive composite pressure vessel is provided. Steel material for composite pressure vessel liners comprises: a chemical composition containing, in mass %, C: 0.10% to 0.60%, Si: 0.01% to 2.0%, Mn: 0.1% to 5.0%, P: 0.0005% to 0.060%, S: 0.0001% to 0.010%, N: 0.0001% to 0.010%, and Al: 0.01% to 0.06%, with a balance being Fe and incidental impurities; and a metallic microstructure in which a mean grain size of prior austenite grains is 20 μm or less, and a total area ratio of martensite and lower bainite is 90% or more.

公开(公告)号：US20210270779A1

公开(公告)日：2021-09-02

申请号：US17254442

申请日：2019-06-21

Applicant: JFE Steel Corporation ,  JFE Container Co., Ltd.

Inventor： Hiroshi Okano ,  Akihide Nagao ,  Nobuyuki Ishikawa ,  Kazuki Matsubara ,  Toshio Takano

IPC: G01N29/14 ,  G01N29/48

Abstract: A life estimation apparatus for a pressure accumulator estimates the life of the pressure accumulator based on an AE signal for the pressure accumulator. The life estimation apparatus includes: an AE sensor that is provided at the pressure accumulator and detects the AE signal; and an estimation unit that sets a point of time at which the AE sensor detects a damage AE signal that is generated from the pressure accumulator because of damage of a material during use of the pressure accumulator, as a minimum initial flaw generation time point that is a point of time at which a minimum initial flaw of the pressure accumulator that is detected by a non-destructive inspection method is generated in shipping of the pressure accumulator.

公开(公告)号：US20210270421A1

公开(公告)日：2021-09-02

申请号：US17253951

申请日：2019-06-21

Applicant: JFE Steel Corporation ,  JFE Container Co., Ltd.

Inventor： Hiroshi Okano ,  Akihide Nagao ,  Nobuyuki Ishikawa ,  Kazuki Matsubara ,  Toshio Takano

IPC: F17C13/02

Abstract: A method of manufacturing a pressure accumulator, using an AE signal for the pressure accumulator, includes: a first estimation step of estimating with an AE sensor provided at the pressure accumulator, a range of stress levels at each of which a damage AE signal that is generated from the pressure accumulator because of damage of material of the pressure accumulator is in a predetermined state; and a first design step of designing the pressure accumulator such that a minimum thickness of the pressure accumulator is determined based on the stress level range estimated in the first estimation step.

公开(公告)号：US12222069B2

公开(公告)日：2025-02-11

申请号：US17287683

申请日：2019-11-11

Applicant: JFE STEEL CORPORATION

Inventor： Toshio Takano ,  Hiroshi Okano ,  Akihide Nagao ,  Nobuyuki Ishikawa ,  Kazuki Matsubara

IPC: F17C1/04 ,  F16J13/12 ,  F17C1/06

Abstract: A high-pressure hydrogen tank includes a metal circular cylinder configured to store high-pressure hydrogen therein, a cap part configured to cover each of opposite end portions of the metal circular cylinder, an outer cylinder surrounding an outer periphery of a circular-cylindrical portion of the metal circular cylinder, and a fastening part configured to fix the cap part to the outer cylinder.

公开(公告)号：US12031674B2

公开(公告)日：2024-07-09

申请号：US17919871

申请日：2021-04-19

Applicant: JFE STEEL CORPORATION

Inventor： Toshio Takano ,  Hiroshi Okano ,  Kotaro Kadota ,  Shusaku Takagi ,  Kazuki Matsubara

IPC: F17C1/00 ,  F16J13/12 ,  F16J15/10

CPC classification number: F17C1/005 ,  F16J13/12 ,  F16J15/10 ,  F17C2250/0452

Abstract: A high-pressure hydrogen container is provided that has a simple configuration, requiring less labor for manufacture, achieving reduced manufacturing costs, and ensuring pressure resistance. The high-pressure hydrogen container includes a metal cylinder configured to store high-pressure hydrogen, a pair of lid parts configured to cover both end portions of the metal cylinder, and a plurality of fastening parts configured to fix the pair of lid parts in a state where the metal cylinder is clamped between the pair of lid parts.

公开(公告)号：US11982644B2

公开(公告)日：2024-05-14

申请号：US17254442

申请日：2019-06-21

Applicant: JFE Steel Corporation

Inventor： Hiroshi Okano ,  Akihide Nagao ,  Nobuyuki Ishikawa ,  Kazuki Matsubara ,  Toshio Takano

IPC: G01N29/14 ,  G01N29/48

CPC classification number: G01N29/14 ,  G01N29/48 ,  G01N2291/0258

Abstract: A life estimation apparatus for a pressure accumulator estimates the life of the pressure accumulator based on an AE signal for the pressure accumulator. The life estimation apparatus includes: an AE sensor that is provided at the pressure accumulator and detects the AE signal; and an estimation unit that sets a point of time at which the AE sensor detects a damage AE signal that is generated from the pressure accumulator because of damage of a material during use of the pressure accumulator, as a minimum initial flaw generation time point that is a point of time at which a minimum initial flaw of the pressure accumulator that is detected by a non-destructive inspection method is generated in shipping of the pressure accumulator.

公开(公告)号：US12203602B2

公开(公告)日：2025-01-21

申请号：US17776302

申请日：2020-11-18

Applicant: JFE STEEL CORPORATION

Inventor： Hiroshi Okano ,  Shusaku Takagi ,  Nobuyuki Ishikawa ,  Akihide Nagao ,  Kazuki Matsubara ,  Toshio Takano ,  Kotaro Kadota ,  Norikazu Yamaguchi ,  Takuya Hasegawa ,  Hiroki Kuno

IPC: F17C5/00 ,  F17C1/06 ,  F17C5/06 ,  F17C13/02 ,  G06Q10/04 ,  G06Q10/08 ,  H01M8/04

Abstract: A hydrogen supply system is configured to supply hydrogen to a fuel-cell vehicle by using a receptacle for hydrogen transport, and includes: a filling unit provided at a hydrogen filling facility and configured to fill the receptacle with hydrogen; a management unit configured to calculate a transport timing at which the hydrogen-filled receptacle is transported to a business facility that operates the fuel-cell vehicle; a transport unit configured to transport the hydrogen-filled receptacle to the business facility in accordance with the transport timing; and a disposition unit configured to dispose the hydrogen-filled receptacle transported to the business facility at a place to which the fuel-cell vehicle is capable of accessing to have a refill of the hydrogen in the business facility.