Preparation method of a new austenitic stainless steel material with high strength and hydrogen embrittlement resistance

Abstract

The invention discloses a method for preparing a novel austenitic stainless steel material with high strength and resistance to hydrogen embrittlement. The content (%) is C<0.08, Si<1.0, Mn 10~16, Ni 6~8, Cr 16~ 18.0, N 0.5~1, P<0.045, S<0.030, Mo 2.0~3.5 and smelting. After smelting, the material is forged at room temperature. After forging, the material is heat treated at 1050-1100°C, cooled in water, and taken out Immediately forge. After forging to a certain extent, heat treatment is carried out on the material at 850°C-950°C, and then heat preservation is carried out at 300°C-400°C, and the stainless steel material is forged twice in different directions. The preparation method of the material has good operability, and the result is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of anti-hydrogen embrittlement of stainless steel, in particular to a high-strength anti-hydrogen embrittlement process method for austenitic stainless steel materials. Background technique [0002] my country is a big hydrogen production and consumption country. In the process of hydrogen energy production and utilization, the high-pressure hydrogen system is the key. The high-pressure hydrogen system, that is, the system containing high-pressure hydrogen in the medium, is the core equipment for hydrogen energy storage and transportation, oil product quality upgrading and coal-to-clean energy. It has the characteristics of flammable and explosive medium, complex failure mechanism, and difficult manufacturing. [0003] Among them, the failure of equipment in high temperature and high pressure environment is an important factor that threatens its safe and stable operation. For example: On April 2, 2010, the ...

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Problems solved by technology

Although the original austenitic stainless steel will not produce obvious hydrogen embrittlement in the hydrogen environment, the problem of hydrogen-induced embrittlement after strain strengthening cannot be ignored

So far, there have been many accidents caused by hydrogen-induced damage to stainless steel in high-pressure hydrogen systems at home and abroad, such as: microcracks in the diaphragm of diaphragm-type hydrogen compressors, cracks in spring tubes (strain-strengthened stainless steel) of high-pressure hydrogen pressure gauges, high-pressure hydrogen The seat of the valve (strain strengthened stainless steel) is damaged, resulting in poor closure

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