Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen

A manufacturing method and hydrogen storage container technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of not easy hydrogen embrittlement, the inability to use low alloy steel, and the high price of hydrogen storage containers, and achieve hydrogen embrittlement resistance excellent effect

Active Publication Date: 2015-11-25
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under a pressure of 15 MPa or more, the risk of hydrogen embrittlement fracture (hydrogen embrittlement fracture) increases during use, so low alloy steel cannot be used, and Austrian steel such as SUS316L steel, which is less prone to hydrogen embrittlement (hydrogen embrittlement) than low alloy steel, can be used. Austenitic stainless steel (austeniticstainlesssteel), etc.
[0005] SUS316L steel, etc. are not only high in cost, but also low in strength
Therefore, in order to be able to withstand the hydrogen pressure of 80MPa, the thickness needs to be greatly increased, and the price of the hydrogen storage container itself becomes very high.

Method used

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  • Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen
  • Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen
  • Steel structure for hydrogen, and method for manufacturing pressure accumulator for hydrogen and line pipe for hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0156] (invention 1)

[0157] Hereinafter, examples for verifying the effects of the present invention will be described regarding the invention (Invention 1) of a steel structure for hydrogen having a steel structure composed of bainite and a remainder substantially ferrite. In addition, in the following examples, the manufacturing method and characteristic evaluation of the steel plate were simulated (simulation) for the manufacturing method and characteristic evaluation of the hydrogen pipe and the hydrogen storage container. Specifically, when the manufacturing method is accelerated cooling or direct quenching and tempering, the case of hydrogen pipelines is simulated, and when reheating and quenching and tempering (reheating, quenching and tempering) are performed, hydrogen storage tanks are simulated Case.

[0158] Steels BA to BH with the chemical compositions shown in Table 1 (Table 1-1, Table 1-2) were melted and cast into billets, heated to the heating temperature s...

Embodiment 2

[0173] (Invention 2)

[0174] Hereinafter, an example for verifying the effects of the present invention will be described regarding the invention (Invention 2) of a steel structure for hydrogen having a steel structure composed of martensite and the remainder substantially ferrite. In the following examples, the manufacturing method and characteristic evaluation of the steel plate were simulated in the same manner as in Example 1, and the manufacturing method and characteristic evaluation of the hydrogen pipe and the hydrogen storage container were simulated. Specifically, when the manufacturing method is accelerated cooling or direct quenching and tempering, the case of hydrogen pipelines is simulated, and when reheating and quenching and tempering (reheating, quenching and tempering) are performed, hydrogen storage tanks are simulated Case.

[0175] Steels MA to MH with the chemical compositions shown in Table 3 (Table 3-1, Table 3-2) were melted and cast into billets, hea...

Embodiment 3

[0190] (Invention 3)

[0191] Hereinafter, examples for verifying the effects of the present invention will be described regarding the invention (Invention 3) of a steel structure for hydrogen having a steel structure composed of pearlite and the remainder substantially ferrite. In the following examples, the manufacturing method and characteristic evaluation of the steel plate were simulated in the same manner as in Example 1, and the manufacturing method and characteristic evaluation of the hydrogen pipe and the hydrogen storage container were simulated. Specifically, when the manufacturing method is accelerated cooling or direct quenching and tempering, the case of hydrogen pipelines is simulated, and when reheating and quenching and tempering (reheating, quenching and tempering) are performed, hydrogen storage tanks are simulated Case.

[0192] Steels PA to PH with the chemical compositions shown in Table 5 (Table 5-1, Table 5-2) were melted and cast into steel slabs, hea...

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Abstract

Provided is a steel structure for hydrogen, such as a pressure accumulator for hydrogen or a line pipe for hydrogen, which has a reduced fatigue crack growth rate, and superior hydrogen embrittlement resistance in a high-pressure hydrogen environment compared to conventional steel. The steel structure for hydrogen, which has excellent hydrogen embrittlement resistance in high-pressure hydrogen gas, has a steel composition having either 10-95% bainite by surface area, 10-95% martensite by surface area, or 10-95% pearlite by surface area, with the remainder substantially comprising ferrite.

Description

technical field [0001] The present invention relates to a hydrogen storage vessel (hydrogen storage vessel), a hydrogen pipeline (hydrogen pipeline) and other hydrogen steel structures (steel structure for hydrogen gas) having excellent hydrogen embrittlement resistance (hydrogen embrittlement resistance) in a high pressure hydrogen environment (high pressure hydrogen environment), and these hydrogen storage A method of manufacturing a container and a pipeline for hydrogen. Background technique [0002] In recent years, hydrogen has attracted worldwide attention as a renewable energy source from the viewpoint of energy diversification. In particular, expectations for fuel cell vehicles using high-pressure hydrogen as a fuel source are increasing, and research related to the development of fuel cell vehicles has been extensively carried out around the world, and some of them have been carried out to practical tests (test for practical use). [0003] Fuel cell vehicles use hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C21D8/02C21D8/10C21D9/00C22C38/06C22C38/58
CPCC21D8/02C21D8/10C21D9/00C21D9/14C21D9/46C21D2211/002C21D2211/008C21D2211/009C22C38/00C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32C22C38/40C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/58C21D8/105C21D9/0068C21D9/085C22C38/38C22C38/42Y02E60/32C21D6/001C21D6/002C21D6/004C21D6/005C21D6/008
Inventor 长尾彰英高木周作
Owner JFE STEEL CORP
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