High-strength hydrogen embrittlement-resistant layered metal composite material for hydrogen storage as well as preparation method and application thereof

By using a composite material of multilayer nickel-saving austenitic stainless steel and 30CrMo steel, combined with high-temperature cumulative rolling and multi-stage heat treatment processes, the problem of hydrogen embrittlement failure in high-pressure hydrogen storage equipment materials has been solved, achieving a balance between high strength and resistance to hydrogen embrittlement, reducing costs and improving the stability of the composite interface.

CN121224239APending Publication Date: 2025-12-30NORTHEASTERN UNIV CHINA
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Patent Information

Application Number
CN202511131671.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-13
Publication Date
2025-12-30

AI Technical Summary

Technical Problem

Existing high-pressure hydrogen storage equipment materials face the problem of hydrogen embrittlement failure in high-pressure hydrogen environments. Traditional austenitic stainless steel is expensive and has low yield strength. Existing composite technologies are difficult to achieve a balance between high strength and resistance to hydrogen embrittlement, and the interface is prone to inclusions and delamination.

Method used

By alternating layers of multi-layer nickel-saving austenitic stainless steel and 30CrMo steel, combined with high-temperature cumulative rolling and multi-stage heat treatment processes, a semi-coherent interfacial structure is formed, which inhibits hydrogen atom diffusion and alleviates interfacial stress concentration, thus preparing a high-strength, hydrogen-embrittle-resistant layered metal composite material.

Benefits of technology

It significantly improves the tensile strength and plasticity of the material in a hydrogen environment, solves the problem of balancing strength and resistance to hydrogen embrittlement, reduces material costs, and ensures the stability of the composite interface. It is suitable for key structural components such as high-pressure hydrogen storage tanks and hydrogen transportation pipelines.

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Abstract

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.
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