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

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.

Description

Technical Field

[0001] This invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and falls under the category of structural materials for hydrogen energy equipment design and manufacturing. Specifically, it relates to a high-strength, hydrogen-brittle-resistant layered metal composite material for hydrogen storage, its preparation method, and its application. Background Technology

[0002] The service performance of critical infrastructure such as high-pressure hydrogen storage tanks and long-distance hydrogen pipelines directly depends on the comprehensive performance of structural materials. These materials need to simultaneously meet stringent requirements such as high strength, excellent resistance to hydrogen embrittlement, good weldability, and long-term service stability. Currently, high-pressure hydrogen storage equipment mainly uses high-strength low-alloy steels, such as Cr-Mo series steels. These materials have the advantages of low cost, excellent pressure resistance, and ease of processing and forming, making them suitable for industrial application. However, they face serious hydrogen embrittlement failure problems in high-pressure hydrogen environments, including hydrogen-induced delayed fracture and hydrogen-induced stress corrosion cracking. Although hydrogen embrittlement can be partially mitigated through microstructure control, microalloying, or surface coatings, the inherent contradiction between material strength and hydrogen resistance has not been fundamentally resolved, which severely restricts the safety and service life of high-pressure hydrogen energy equipment.

[0003] In contrast, austenitic stainless steel exhibits superior resistance to hydrogen embrittlement due to its face-centered cubic crystal structure's high barrier to hydrogen diffusion and the absence of hydrogen accumulation induced by phase transformation. However, the widespread application of traditional austenitic stainless steel is limited by two major factors: firstly, obtaining a stable austenitic structure typically requires the addition of more than 8% nickel, resulting in high material costs and hindering its large-scale application in structural components; secondly, its yield strength is generally below 400 MPa, failing to meet the high strength requirements of high-pressure hydrogen storage equipment.

[0004] To address the performance limitations of single materials, researchers have recently explored multilayer metal composite technologies, such as explosive welding and hot rolling composites, to integrate high-strength steel and austenitic stainless steel on a macroscopic scale, achieving synergistic optimization of strength and hydrogen resistance. However, existing composite technologies still face numerous challenges. For instance, inclusions, delamination, or voids easily appear at the composite interface, potentially becoming weak points for crack initiation and propagation under high-pressure hydrogen environments. Furthermore, differences in microstructure evolution during hot processing of dissimilar materials can lead to elemental segregation near the interface, residual stress concentration, and localized performance degradation. In addition, existing solutions primarily focus on the combination of mechanical properties, lacking a systematic design for multi-scale synergistic mechanisms such as hydrogen diffusion path regulation and hydrogen damage blocking.

[0005] Currently, composite layer materials are still mainly traditional austenitic stainless steel. A nickel-saving austenitic alloy system that combines low cost, high strength and high hydrogen resistance has not yet been developed, and there is a lack of matching interface precision control technology. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned problems, innovate material design and preparation technology, and construct a new composite material system that integrates hydrogen resistance, toughness and economy, so as to completely solve the reliability bottleneck of hydrogen energy equipment in high pressure and long-term service, and promote the large-scale development of the hydrogen energy industry.

[0007] To achieve the above objectives, a first aspect of the present invention provides a high-strength, hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage, the composite material comprising multiple layers of nickel-saving austenitic stainless steel and multiple layers of 30CrMo steel, wherein nickel-saving austenitic stainless steel (NEASS) layers and 30CrMo steel layers of the same thickness are alternately stacked to form the composite material.

[0008] The chemical composition of the nickel-saving austenitic stainless steel layer, by mass fraction, includes: C 0.02-0.04%, Cr 14-16%, Ni 4-6%, Mn 10-12%, Si 0.2-0.4%, N 0.2-0.4%, Nb 0.01-0.03%, V 0.02-0.05%, with the balance being Fe;

[0009] The chemical composition of the 30CrMo steel layer, by mass fraction, includes: C 0.25-0.35%, Cr 0.8-1.2%, Ni 0.03-0.05%, Mn 0.7-1.2%, Mo 0.12-0.18%, Si 0.12-0.18%, with the balance being Fe.

[0010] As a preferred embodiment, in the above-mentioned high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the ratio of the total thickness of the nickel-saving austenitic stainless steel layer to the total thickness of the 30CrMo steel layer is 1:0:95-1.

[0011] As a preferred embodiment, in the above-mentioned high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage, the composite material uses a nickel-saving austenitic stainless steel (NEASS) layer as the outermost layer.

[0012] A second aspect of the present invention provides a method for preparing the above-described high-strength, hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage, the method comprising:

[0013] (1) Alloy smelting: Nickel-saving austenitic stainless steel and 30CrMo steel are cast into ingots respectively;

[0014] (2) Forging: After solution treatment of the ingot obtained in step (1), it is forged into a slab;

[0015] (3) Perform hot rolling to the required thickness and water cooling to room temperature;

[0016] (4) Raw material processing: The material to be accumulated and rolled is cut into slabs of equal size, and its surface is polished and cleaned;

[0017] (5) Billet assembly: Alternately stack the pretreated nickel-saving austenitic stainless steel and 30CrMo steel slabs;

[0018] (6) Welding: Weld the edges of the composite blank in a vacuum environment to prevent interface oxidation;

[0019] (7) Solution heat treatment: The packaged composite blank is subjected to solution treatment;

[0020] (8) Hot rolling composite: The composite billet is hot rolled and then air-cooled to room temperature;

[0021] (9) Cumulative stacking: Repeat steps (4) to (8) to obtain a multilayer composite with a multilayered structure.

[0022] plywood;

[0023] (10) Annealing treatment: The multilayer composite plate is annealed and then water-quenched to room temperature;

[0024] (11) Tempering treatment: The plate is tempered and air-cooled to room temperature to further improve the toughness and stability of the material and optimize its resistance to hydrogen embrittlement.

[0025] This invention combines high-temperature cumulative rolling composite and multi-stage heat treatment processes to achieve metallurgical bonding of the two component metal interfaces, resulting in a semi-coherent atomic structure at the interface. This interface exhibits an irreversible hydrogen trapping effect, significantly inhibiting hydrogen atom diffusion and alleviating interfacial stress concentration, effectively improving the material's resistance to hydrogen embrittlement. The resulting composite material maintains a tensile strength exceeding 1500 MPa and good plastic deformation capacity in a hydrogen environment, overcoming the technical bottleneck of traditional single-metal materials that struggle to simultaneously achieve strength and resistance to hydrogen embrittlement. It is suitable for manufacturing critical structural components such as high-pressure hydrogen storage tanks and hydrogen transportation pipelines.

[0026] As a preferred embodiment, in step (1) of the above-mentioned method for preparing a high-strength, hydrogen-brittle-resistant layered metal composite material for hydrogen storage, the alloy melting process maintains a vacuum level of 2.0 × 10⁻⁶. -3 The pressure is below 100 Pa to avoid the mixing of gaseous impurities such as oxygen and nitrogen, ensuring uniform composition and low impurity content.

[0027] As a preferred embodiment, in step (1) of the above-mentioned method for preparing high-strength, hydrogen-embrittlement-resistant layered metal composite materials for hydrogen storage, the melting temperature is set to 1550–1650°C, and a staged feeding method is adopted, first adding the iron-based base material, and then gradually adding high-melting-point alloying elements. The heating rate is controlled to not exceed 10°C / min to suppress segregation and inclusions. After the melt is held at this temperature for 25–35 minutes, it is poured into a water-cooled copper mold to form an ingot.

[0028] As a preferred embodiment, in step (6) of the above-mentioned method for preparing high-strength, hydrogen-brittle-resistant layered metal composite materials for hydrogen storage, a vacuum electron beam welder is used at a vacuum degree of 10. -3 Welding is performed around the composite blank in a vacuum environment below Pa to effectively prevent oxidation and inclusion contamination at the laminated interface. According to one specific embodiment of the present invention, the main welding parameters are: bias voltage 1900–2100V, beam current 20–30mA, focusing current 350–450mA, filament current 15–18A, and welding speed 350–450mm / min. Welding ensures a hermetically sealed interface and good interfacial bonding.

[0029] As a preferred embodiment, in step (2) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the solution treatment temperature is 1150-1250℃ and the solution treatment time is 1.5-2.5 hours, so as to eliminate the segregation of the initial solidification structure, promote the dissolution of carbides and inclusions, and obtain an alloy matrix with uniform composition and structure.

[0030] As a preferred option, in step (4) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, acetone and anhydrous ethanol can be used alternately for cleaning to ensure that the composite surface is clean and flat.

[0031] As a preferred embodiment, in step (7) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the solution treatment temperature is 1150-1250℃ and the solution treatment time is 5-7 hours, so as to enhance element diffusion and interlayer bonding.

[0032] As a preferred embodiment, in step (3) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the hot rolling temperature is 900-1150℃.

[0033] As a preferred embodiment, in step (8) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the hot rolling temperature is 1150-1200℃.

[0034] As a preferred embodiment, in step (10) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the annealing temperature is 900-1000℃, preferably held for 12-18 minutes and then rapidly water-quenched to room temperature to achieve grain refinement, uniform structure and release of residual stress.

[0035] As a preferred option, in step (11) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the plate is tempered for 1.5 to 2.5 hours under argon protection at 180 to 220°C to finally obtain a composite material with refined structure, released internal stress, and stable performance.

[0036] According to a specific embodiment of the present invention, in step (2) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the material is forged into a (350-450)×(100-140)×(80-100)mm slab.

[0037] According to a specific embodiment of the present invention, in step (3) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the rolling thickness is 5-10 mm.

[0038] According to a specific embodiment of the present invention, in step (5) of the above-mentioned method for preparing high-strength hydrogen-resistant and brittle-resistant layered metal composite material for hydrogen storage, the total thickness is 35-45 mm.

[0039] According to a specific embodiment of the present invention, in step (8) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the plate is rolled to a thickness of 3.5 to 4.5 mm.

[0040] According to a specific embodiment of the present invention, in step (9) of the above-mentioned method for preparing high-strength hydrogen-resistant layered metal composite material for hydrogen storage, the number of layers in the multilayer composite plate is 540 to 600, and the thickness of a single layer of the multilayer composite plate is approximately in the micrometer range.

[0041] Because the resulting composite material possesses high strength, high plasticity, and excellent resistance to hydrogen embrittlement, it is suitable as a structural material for high-pressure hydrogen storage tanks, hydrogen pipelines, and other critical hydrogen energy equipment. Therefore, a third aspect of the present invention provides the application of the above-mentioned high-strength, hydrogen-embrittle-resistant layered metal composite material for hydrogen storage as a structural material for hydrogen energy equipment.

[0042] Compared with the prior art, the present invention has at least the following beneficial effects:

[0043] 1. Combining high strength and high resistance to hydrogen embrittlement: Through the rationally designed composite structure of nickel-saving austenitic stainless steel and CrMo steel, excellent strength and resistance to hydrogen embrittlement are achieved, breaking through the bottleneck of traditional single materials that are difficult to balance "strength-toughness-resistance to hydrogen embrittlement" in hydrogen environment, and significantly improving the reliability of material service.

[0044] 2. Significantly reduced costs: The designed stainless steel is a low-nickel system, with some elements such as manganese and nitrogen replacing expensive nickel. This effectively reduces raw material costs while ensuring structural stability and resistance to hydrogen embrittlement, thus enhancing the engineering applicability and economic viability of the material.

[0045] 3. Strong interface bonding and high stability of composite structure: The vacuum encapsulation-cumulative rolling composite process effectively avoids problems such as interface oxidation and inclusion contamination that occur in conventional composite processes, resulting in a composite interface with good metallurgical bonding and no obvious delamination defects, thus improving the overall stability of the multilayer composite structure.

[0046] 4. The preparation process can be scaled up to industrial scale: The composite and heat treatment process adopted in this invention is simple, highly controllable, suitable for continuous industrial production, and has a high degree of process maturity and industrial scale-up potential.

[0047] 5. Broad application prospects: This composite material is particularly suitable for the manufacture of hydrogen storage and transportation equipment such as high-pressure hydrogen storage tanks and hydrogen pipelines, and can also be extended to various scenarios with stringent requirements for high strength and hydrogen resistance in petrochemical, nuclear energy, aerospace and other fields.

[0048] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0049] Figure 1 This is one embodiment of the combination of the NEASS layer and the CrMo steel layer according to the present invention;

[0050] Figure 2 The tissue morphology of the sample scan in Example 1;

[0051] Figure 3 The tissue morphology of the sample in Example 2 is shown in the scan.

[0052] Figure 4 The tissue morphology of the sample in Example 3 is shown in the scan. Detailed Implementation

[0053] To more clearly illustrate the technical solution of the present invention, the present invention will be described in detail below with reference to specific embodiments. It should be understood that equivalent changes and improvements made to the embodiments by those skilled in the art without departing from the spirit and essence of the present invention should be considered within the protection scope of the present invention.

[0054] In this embodiment of the invention, the combination of the NEASS layer and the CrMo steel layer is referenced. Figure 1 .

[0055] Example 1

[0056] 1. Raw material preparation

[0057] A vacuum induction melting furnace was used to melt nickel-saving austenitic stainless steel (NEASS) and 30CrMo steel, respectively. The melting temperature was set at 1600℃, and the vacuum degree was controlled at 2.0 × 10⁻⁶. -3 Below Pa, a staged feeding method is used, with the heating rate controlled at no more than 10℃ / min to ensure uniform alloy composition and no inclusions. After holding the melt at this temperature for 30 minutes, it is poured into a water-cooled copper mold preheated to 200℃ to form an ingot.

[0058] The specific composition (mass fraction) of the NEASS alloy design is: C 0.03%, Cr 15%, Ni 5%, Mn 11%, Si 0.3%, N 0.3%, Nb 0.02%, V 0.04%, with the balance being Fe.

[0059] The specific composition (mass fraction) of 30CrMo steel is designed as follows: C 0.30%, Cr 1.0%, Ni 0.04%, Mn 1.0%, Mo 0.15%, Si 0.15%, with the balance being Fe.

[0060] The ingot is solution treated at 1200℃ for 2 hours, then forged into a slab to eliminate segregation and internal stress, and promote the dissolution of carbides and inclusions. Subsequently, it is hot rolled in multiple passes between 900℃ and 1150℃ to a thickness of 8.0 mm, and then water-cooled to room temperature.

[0061] 2. Pretreatment and assembly of raw sheet materials

[0062] The hot-rolled NEASS and 30CrMo steel plates are cut into slabs of the same size, mechanically ground to remove oxide scale and impurities, and then ultrasonically cleaned with alternating acetone and anhydrous ethanol for 15 minutes each step to ensure that the composite surface is clean and flat.

[0063] The layers are stacked alternately in a 1:1 thickness ratio, with the outermost layer being NEASS. The total thickness after stacking is approximately 40mm, forming a multi-layered structure.

[0064] 3. Vacuum electron beam welding edge sealing

[0065] The stacked composite blanks are placed in a vacuum electron beam welder with a vacuum level ≤10. -3 Pa is used to seal the edges of the composite blank to prevent interface oxidation and inclusions. The welding parameters are: bias voltage 2000V, beam current 25mA, focusing current 400mA, filament current 16A, and welding speed 400mm / min.

[0066] 4. Solution treatment and hot rolling combined

[0067] The encapsulated composite billet was solution treated at 1200℃ for 6 hours to promote element diffusion and interfacial bonding. It was then heated to 1150℃ and hot-rolled in multiple passes with a single-pass reduction of 20% and a total reduction of 88%, rolled to a thickness of approximately 4mm and then air-cooled to room temperature.

[0068] 5. Cumulative rolling

[0069] After the hot-rolled composite sheet is cut, mechanically ground and ultrasonically cleaned, it is re-stacked at a 1:1 ratio and the encapsulation, welding, solution treatment and hot rolling composite process are repeated 6 times to finally produce a multi-layer metal composite sheet with a thickness of about 4mm and 576 layers.

[0070] 6. Annealing and tempering treatment

[0071] The multi-layer composite sheet was annealed at 900℃ for 15 minutes and then rapidly water-quenched to room temperature to refine the grains and release residual stress. Subsequently, it was tempered at 200℃ in an argon-protected environment for 2 hours and then naturally cooled to room temperature to further improve toughness and resistance to hydrogen embrittlement.

[0072] Figure 2 The tissue morphology of the sample in Example 1 is shown in the scan.

[0073] Example 2

[0074] The process flow and alloy composition were exactly the same as in Example 1, except that the annealing temperature was increased to 1000℃, held at that temperature for 15 minutes, and then rapidly water-quenched to room temperature, followed by tempering at 200℃ under argon protection for 2 hours. This annealing temperature effectively promoted grain refinement and microstructure homogenization, while further releasing residual stress.

[0075] Figure 3 The tissue morphology of the sample in Example 2 is shown in the scan.

[0076] Example 3

[0077] The process parameters and composition were the same as in Example 1, but the annealing temperature was adjusted to 1100℃. After holding at that temperature for 15 minutes, the grains were rapidly water-quenched, followed by tempering at 200℃ under argon protection for 2 hours. Higher annealing temperatures help to further refine the grains and release internal stress, thereby improving the stability of the microstructure.

[0078] Figure 4 The tissue morphology of the sample in Example 3 is shown in the scan.

[0079] Comparative Example 1 (NEASS Single Board)

[0080] To compare the performance differences between the composite material and the single-component material of this invention, this comparative example was prepared using the optimized process scheme verified in Example 2. Specifically, nickel-saving austenitic stainless steel (NEASS) single plates were treated according to the hot rolling (1200°C), annealing (1000°C, holding for 15 minutes, water quenching), and tempering (200°C, 2 hours, argon protection) process of Example 2. All thermomechanical treatment parameters were consistent with the composite plate preparation process.

[0081] Comparative Example 2 (CrMo steel veneer)

[0082] The CrMo steel veneer was prepared using the same hot rolling and heat treatment process as in Example 2, while the remaining thermomechanical processing parameters remained the same.

[0083] Table 1 shows the mechanical properties of the composite plates at different annealing temperatures (Examples 1-3).

[0084]

[0085] Table 2 shows a comparison of the slow tensile test (SSRT) performance data of different samples before and after hydrogen charging.

[0086] Table 2

[0087]

[0088] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-strength, hydrogen-brittle-resistant layered metal composite material for hydrogen storage, characterized in that, The composite material comprises multiple layers of nickel-alternating austenitic stainless steel and multiple layers of 30CrMo steel, and the same thickness of the nickel-alternating austenitic stainless steel and the 30CrMo steel are alternately stacked to form the composite material. The chemical composition of the nickel-alternating austenitic stainless steel layer includes, in mass fraction, C 0.02-0.04%, Cr 14-16%, Ni 4-6%, Mn 10-12%, Si 0.2-0.4%, N 0.2-0.4%, Nb 0.01-0.03%, V 0.02-0.05%, and the balance of Fe. The chemical composition of the 30CrMo steel layer includes, in mass fraction, C 0.25-0.35%, Cr 0.8-1.2%, Ni 0.03-0.05%, Mn 0.7-1.2%, Mo 0.12-0.18%, Si 0.12-0.18%, and the balance of Fe.

2. The high-strength hydrogen embrittlement resistant layered metal composite for hydrogen storage according to claim 1, characterized by In the composite material, the ratio of the total thickness of the nickel-alternating austenitic stainless steel layer to the total thickness of the 30CrMo steel layer is 1:0:95-1.

3. The high-strength hydrogen embrittlement resistant layered metal composite for hydrogen storage according to claim 1, characterized by The composite material takes the nickel-alternating austenitic stainless steel layer as the outermost layer.

4. The method of producing a high-strength hydrogen embrittlement resistant layered metal composite for hydrogen storage according to any one of claims 1 to 3, characterized in that, The preparation method comprises the following steps: (1) alloy smelting: the nickel-alternating austenitic stainless steel and the 30CrMo steel are respectively cast into ingots; (2) forging: after the cast ingot obtained in step (1) is subjected to solid solution treatment, the ingot is forged into a slab; (3) hot rolling: hot rolling is performed to the required thickness and water cooling is performed to room temperature; (4) original plate treatment: the materials subjected to the cumulative roll bonding are cut into slabs with equal sizes, and the surfaces of the slabs are polished and cleaned; (5) slab assembly: the pre-processed nickel-alternating austenitic stainless steel and 30CrMo steel slabs are alternately stacked; (6) welding: the periphery of the composite slab is welded and sealed in a vacuum environment; (7) solid solution heat treatment: the sealed composite slab is subjected to solid solution treatment; (8) hot rolling of the composite: the composite slab is subjected to hot rolling of the composite, and then air cooling is performed to room temperature; (9) cumulative roll bonding: steps (4)-(8) are repeated to obtain a multi-layer composite plate; (10) annealing treatment: the multi-layer composite plate is subjected to annealing treatment, and then water quenching is performed to room temperature; (11) tempering treatment: the plate is subjected to tempering treatment.

5. The preparation method of the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to claim 4, wherein In step (1), the alloy melting is maintained at a vacuum degree of 2.0 x 10 -3 Pa or less; In step (6), a vacuum electron beam welder is used to weld the edges of the composite blank in a vacuum of 10 -3 The edges of the composite blank are welded in a vacuum environment with a pressure of less than 10 Pa.

6. The preparation method of the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to claim 4, wherein In step (1), the smelting temperature is 1550-1650°C; In step (1), the heating rate of smelting is not more than 10°C / min; In step (2), the temperature of the solid solution treatment is 1150-1250°C, and the time of the solid solution treatment is 1.5-2.5 hours; In step (7), the temperature of the solid solution treatment is 1150-1250°C, and the time of the solid solution treatment is 5-7 hours.

7. The preparation method of the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to claim 4, wherein In step (3), the temperature of the hot rolling is 900-1150°C; In step (8), the temperature of the hot rolling of the composite is 1150-1200°C.

8. The method for preparing the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to claim 4, characterized in that, in step (10), the annealing temperature is 900-1000℃. In step (11), the plate is tempered in an argon protective environment at 180-220℃ for 1.5-2.5 hours.

9. The method for preparing the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to claim 4, characterized in that, in step (2), the plate blank is forged into (350-450) x (100-140) x (80-100) mm; In step (3), the rolling thickness is 5-10 mm; In step (5), the total thickness is 35-45 mm; In step (8), the plate thickness is rolled to 3.5-4.5 mm; In step (9), the number of layers of the multi-layer composite plate is 540-600 layers.

10. The use of the high-strength hydrogen embrittlement resistant layered metal composite material for hydrogen storage according to any one of claims 1-3 as a structural material for hydrogen energy equipment. ​ ​

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