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Austenitic stainless steel, preparation method thereof and application of austenitic stainless steel in hydrogen storage pressure vessel

A technology of austenitic stainless steel and pressure vessel, which is applied in the direction of gas/liquid distribution and storage, mechanical equipment, metal rolling, etc. It can solve the problems that affect and limit the use of stainless steel, reduce the fracture strength, reduce fatigue performance, etc., and achieve the guarantee Thermal processing performance, improvement of thermoplasticity, effect of reducing sensitivity

Active Publication Date: 2022-04-15
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more and more studies have shown that austenitic stainless steel also has certain susceptibility to hydrogen embrittlement. Hydrogen will still reduce the plasticity of the alloy, reduce the fracture strength and fatigue performance, and then affect and limit the use of stainless steel in hydrogen storage containers.

Method used

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Examples

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preparation example Construction

[0042] In the second aspect, based on the same inventive concept, the present invention also provides a method for preparing the austenitic stainless steel, comprising the following steps:

[0043] (1) Smelting + continuous casting: use electric furnace + AOD + LF smelting to obtain molten steel with the target content, and obtain continuous casting slabs through continuous casting;

[0044] (2) Slab heating: heating the continuous casting slab to 1260°C-1280°C, heating time=(slab thickness÷10mm)×(10-11)min;

[0045] (3) Hot rolling: rough rolling the continuous casting slab to 30-60 mm at 1050°C-1120°C, and then finish rolling at 850-1000°C to obtain a hot-rolled plate with a target thickness;

[0046] (4) Solution treatment: heating the hot-rolled sheet to 1070°C-1090°C, and the treatment time is 5-8min / mm;

[0047] (5) After straightening → shot blasting → pickling → grinding, austenitic stainless steel plates are obtained.

[0048] The preparation method of the austeniti...

Embodiment 1

[0063] The chemical composition of the austenitic stainless steel plate for the hydrogen storage pressure vessel of the present embodiment is as follows:

[0064] C: 0.016%, Si: 0.55%, Mn: 1.46%, Cr: 17.74%, Ni: 13.21%, Mo: 2.71%, P: 0.028%, S: 0.001%, N: 0.026%, Cu: 0.13%, B: 0.0041%, the balance is Fe and unavoidable impurities. Wherein the nickel equivalent Nieq is 29.32.

[0065] The preparation method of present embodiment stainless steel is as follows:

[0066] (1) Using electric furnace + AOD + LF smelting, through continuous casting to obtain a continuous casting slab with a thickness of 180mm and a width of 1000mm.

[0067] (2) Heat the continuous casting slab at 1280°C for 180 minutes.

[0068] (3) The continuous casting slab was roughly rolled to 55 mm at 1080° C., and then finish rolled at 980° C. to obtain a hot-rolled middle plate with a thickness of 35 mm.

[0069] (4) Heat the hot-rolled sheet to 1075°C and perform solution treatment for 200 minutes.

[00...

Embodiment 2

[0077] The chemical composition of the austenitic stainless steel plate for the hydrogen storage pressure vessel of the present embodiment is as follows:

[0078] C: 0.023%, Si: 0.67%, Mn: 1.65%, Cr: 17.85%, Ni: 13.68%, Mo: 2.88%, P: 0.026%, S: 0.001%, N: 0.034%, Cu: 0.21%, B: 0.0035%, the balance is Fe and unavoidable impurities. Wherein the nickel equivalent Nieq is 30.4.

[0079] The preparation method of present embodiment stainless steel is as follows:

[0080] (1) Using electric furnace + AOD + LF smelting, the continuous casting slab with a thickness of 200mm and a width of 1250mm was obtained through continuous casting.

[0081] (2) Heat the continuous casting slab at a temperature of 1270°C for a heating time of 220 minutes.

[0082] (3) The continuous casting slab was roughly rolled to 40 mm at 1110° C., and then finish rolled at 930° C. to obtain a hot-rolled medium plate with a thickness of 14 mm.

[0083] (4) Heat the hot-rolled sheet to 1085°C and perform sol...

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Abstract

The invention belongs to the technical field of steel smelting, and relates to austenitic stainless steel, a preparation method thereof and application of the austenitic stainless steel in a hydrogen storage pressure container. The austenitic stainless steel provided by the invention comprises the following components in percentage by weight: 0.010%-0.030% of C, 0.40%-0.75% of Si, 1.3%-2.0% of Mn, 17.5%-18.0% of Cr, 13.05%-14.00% of Ni, 2.5%-3.0% of Mo, less than or equal to 0.030% of P, less than or equal to 0.002% of S, less than or equal to 0.06% of N, less than or equal to 0.5% of Cu, 0.002%-0.005% of B, 28.5%-35% of Nieq, and the balance of Fe and inevitable impurities. The austenitic stainless steel is stable in structure performance, low in ferrite content and good in hydrogen embrittlement resistance, the development requirement of a hydrogen storage pressure container of a hydrogen refueling station is met, and the austenitic stainless steel has important practical significance on safe and efficient development of the hydrogen energy storage technology.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and relates to an austenitic stainless steel and its preparation method and its application in a hydrogen storage pressure vessel, in particular to a hydrogen storage pressure of a hydrogenation station with a pressure ≥ 41 MPa and a temperature of 40°C to 85°C Austenitic stainless steel for containers and its preparation method. Background technique [0002] Hydrogen storage methods mainly include high-pressure hydrogen storage, liquid hydrogen storage, metal hydride hydrogen storage, organic liquid hydrogen storage, etc. Among them, high-pressure hydrogen storage technology is mature and the market is stable, and it plays a leading role in hydrogen storage methods. In the high-pressure hydrogen storage container, because the hydrogen storage container has been working in a high-pressure hydrogen environment for a long time, and hydrogen has been repeatedly charged and discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/42C22C38/54C22C33/04C21D8/02B21B1/22F17C11/00
CPCC22C38/02C22C38/04C22C38/44C22C38/001C22C38/42C22C38/54C22C33/04C21D8/0205C21D8/0226C21D8/0247B21B1/22F17C11/005C21D2211/001B21B2001/225Y02E60/32
Inventor 莫金强张威李阳徐梅
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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