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Steel for high pressure hydrogen gas environments, steel structure for high pressure hydrogen gas environments, and method for producing steel for high pressure hydrogen gas environments

A high-pressure hydrogen gas and manufacturing method technology, applied in the direction of manufacturing tools, outer walls of container structures, pressure vessels, etc., can solve the problems of high cost, high price of hydrogen structures, low strength, etc., and achieve simple hydrogen embrittlement resistance, Effect of improving fatigue resistance

Active Publication Date: 2021-08-17
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, austenitic stainless steel such as SUS316L has high cost and low strength, so if it is designed to withstand high hydrogen pressure, the wall thickness will be thick, and the price of the hydrogen structure itself will be high

Method used

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  • Steel for high pressure hydrogen gas environments, steel structure for high pressure hydrogen gas environments, and method for producing steel for high pressure hydrogen gas environments
  • Steel for high pressure hydrogen gas environments, steel structure for high pressure hydrogen gas environments, and method for producing steel for high pressure hydrogen gas environments

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Effect test

Embodiment

[0131] Molten steel having the composition shown in Table 1 was melted in a converter, and continuously cast to form a cast slab (slab: wall thickness: 250 mm). The obtained slab was heated and hot-rolled to form a thick steel plate (thickness: 38 mm), cooled to room temperature once, and reheated, quenched and tempered under the conditions shown in Table 2 (steel plate No. 1 to No.16, No.21~No.23). It should be noted that the quenching treatment is water cooling or oil cooling.

[0132] In addition, the obtained slab was heated under the conditions shown in Table 2, hot-rolled, and made into a thick steel plate with a predetermined thickness (38mm), and then accelerated cooling was carried out under the conditions shown in Table 2 ( steel plate No.17, No.18).

[0133] In addition, the obtained slab was heated under the conditions shown in Table 2, and hot rolled to form a thick steel plate with a predetermined thickness (38mm), followed by direct quenching under the conditi...

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Abstract

Provided are: steel that is ideal for hydrogen accumulators, hydrogen line pipe, etc. and has excellent hydrogen embrittlement resistance characteristics in high pressure hydrogen gas environments; and a method for producing the same. The steel for high pressure hydrogen gas environments has a prescribed component composition, a tensile strength of at least 560 mPa, and a fracture toughness value KIH in a high pressure hydrogen gas atmosphere of at least 40 MPa.m1 / 2.

Description

technical field [0001] The present invention relates to a steel material and steel structure suitable for high-pressure hydrogen environment and a manufacturing method of steel material for high-pressure hydrogen environment, in particular to the improvement of the hydrogen embrittlement resistance of the steel material under high-pressure hydrogen environment. Background technique [0002] In recent years, hydrogen, as a clean energy source, has received great attention from the viewpoint of diversification of energy sources all over the world. In particular, high expectations are placed on fuel cell vehicles using high-pressure hydrogen as a fuel source. The development of fuel cell vehicles has been widely promoted in the world, and some of them have been put into practical use. [0003] Fuel cell vehicles run with hydrogen sealed in their tanks instead of conventional gasoline. Therefore, there is a need for a hydrogen refueling station for refueling instead of a gas st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C38/00C22C38/16C22C38/58
CPCC22C38/58C21D2211/008C21D1/18C21D1/26C21D8/0247C21D8/0263C21D1/58C21D1/60C21D9/46C21D9/14C22C38/001C22C38/02C22C38/04C22C38/06C22C38/42C22C38/16C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54Y02E60/32C21D9/08C22C38/002C22C38/005F17C1/14F17C2203/0639F17C2221/012
Inventor 长尾彰英
Owner JFE STEEL CORP
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