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Composite pressure vessel liner, composite pressure vessel, and method for producing composite pressure vessel liner

A composite container and manufacturing method technology, applied to the outer wall of the container structure, manufacturing tools, pressure vessels, etc., can solve the problems of storage container size limitation, increased container weight, and low strength of stainless steel, so as to achieve low-cost provision and reduce usage Effect

Active Publication Date: 2019-04-02
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, stainless steel such as SUS316 has low strength, so when the hydrogen pressure is increased to 70 MPa, for example, the wall thickness of the storage container becomes extremely thick, which increases the weight of the container
Therefore, the size of the storage container is limited, the amount of hydrogen stored in the container is reduced, not only that, but there is also a problem of high raw material cost and poor economy

Method used

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  • Composite pressure vessel liner, composite pressure vessel, and method for producing composite pressure vessel liner
  • Composite pressure vessel liner, composite pressure vessel, and method for producing composite pressure vessel liner
  • Composite pressure vessel liner, composite pressure vessel, and method for producing composite pressure vessel liner

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Embodiment

[0144] Next, the present invention will be described more specifically based on examples. The following examples show preferred examples of the present invention, and the present invention is not limited by these examples.

[0145] Liners for composite tank pressure accumulators made of steel materials with the composition shown in Table 1 were manufactured. The fabrication steps are described below. First, a billet having the composition shown in Table 1 was produced, and the billet was rolled and expanded with heat to obtain a seamless steel pipe. The production of the above-mentioned steel pipe is carried out under the conditions that pipe expansion is completed at 820° C. or higher. The obtained steel pipe was air-cooled, formed into a liner shape, and further quenched and tempered. Table 2 shows the quenching and tempering conditions. The minimum cooling rate in the quenching process shown in Table 2 was measured by installing a thermocouple on the inner side surface ...

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Abstract

Provided is a composite pressure vessel liner that is suitably used for a composite pressure vessel for storing high-pressure hydrogen, has a structure that is less prone to material degradation in ahydrogen environment, and has a tensile strength of not less than 850 MPa. The composite pressure vessel liner has a predetermined component composition and comprises a steel material with a metal structure in which the area fraction of martensite at a location one-fourth of the thickness in the inner side is not less than 30%, the total area fraction of martensite and bainite at a location one-fourth of the thickness in the inner side is not less than 95%, and the total area fraction of martensite and bainite at a thickness center portion is not less than 95%. The composite pressure vessel liner has a thickness at a longitudinal center portion of not less than 20 mm and a tensile strength at the thickness center portion of not less than 850 MPa.

Description

technical field [0001] The present invention relates to a liner for a composite vessel pressure accumulator, in particular to a liner for a composite vessel pressure accumulator suitable for storing high-pressure hydrogen. In addition, the present invention relates to a composite container accumulator in which the above-mentioned liner for the composite container pressure accumulator is coated with a carbon fiber reinforced resin, and a method for manufacturing the above-mentioned liner for the composite container pressure accumulator. Background technique [0002] Fuel cell vehicles using hydrogen as fuel do not emit carbon dioxide (CO 2 ), the energy efficiency is also excellent, therefore, as a solution to CO 2 Cars with emission issues and energy issues are highly anticipated. In order to popularize such fuel cell vehicles, in hydrogen refueling stations for supplying hydrogen to fuel cell vehicles, a container (storage station) with excellent strength and durability c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C21D9/08C22C38/06C22C38/58F16J12/00F17C1/02
CPCC21D9/08C22C38/00C22C38/06C22C38/58F16J12/00C21D8/10F17C1/02C21D2211/002C21D2211/008C22C38/02C22C38/04C22C38/22Y02E60/32F17C2203/011F17C2203/0604F17C2203/0607F17C2203/0639
Inventor 冈野拓史高木周作
Owner JFE STEEL CORP
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