Characterization method and system for hydrogen embrittlement performance of pipeline steel for hydrogen-doped conveying

Abstract

The invention discloses a characterization method and system for hydrogen embrittlement performance of pipeline steel for hydrogen-doped conveying, and relates to the technical field of hydrogen energy storage and transportation materials, and the characterization method comprises the following steps: respectively placing a plurality of sample groups to be tested in different hydrogen pressures and at the same test temperature; respectively carrying out standard slow tensile tests on the plurality of to-be-tested sample groups to obtain an average stress-strain curve of each to-be-tested sample group under the corresponding hydrogen pressure; based on the average stress-strain curve, respectively calculating the average elongation after fracture, the average yield strength and the average tensile strength of each to-be-tested sample group; the average elongation after fracture, the average yield strength and the average tensile strength are used as parameters for representing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped conveying, and the hydrogen embrittlement phenomenon of the to-be-tested sample under different hydrogen pressures is represented. The technical problem that the influence of hydrogen on the mechanical property of the material in a low-concentration gaseous hydrogen service environment cannot be reflected due to the fact that a hydrogen supersaturation state easily occurs in the material in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy storage and transportation materials, and particularly to a method and system for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation. Background Art

[0002] In the hydrogen energy industry chain, the safe and efficient transportation of hydrogen is one of the key links restricting its large-scale application. At present, hydrogen energy storage and transportation mainly include four methods: gaseous storage and transportation, liquid storage and transportation, solid storage and transportation, and organic liquid storage and transportation. Among them, high-pressure gaseous storage and transportation has become the most widely used and commercially mature hydrogen energy storage and transportation technology due to its simple equipment structure, flexible hydrogen charging and discharging response, and significant overall energy efficiency.

[0003] To achieve the safe and efficient storage and transportation of hydrogen energy, the key lies in solving the safety problems of hydrogen energy storage and transportation equipment. If the hydrogen energy storage and transportation equipment fails, it may trigger accidents such as hydrogen leakage, deflagration or explosion, causing heavy casualties and economic losses. Such high-risk characteristics make storage and transportation safety the primary technical barrier to the large-scale application of hydrogen energy. Therefore, it is urgent to clarify the failure modes and damage mechanisms of hydrogen energy storage and transportation equipment, and clarify the performance degradation mechanism of materials in a hydrogen environment. As a typical failure mechanism of hydrogen energy storage and transportation equipment, hydrogen embrittlement is usually characterized by the electrochemical hydrogen charging slow strain rate tensile test to study the hydrogen embrittlement phenomenon of materials in a high-pressure hydrogen environment. However, for hydrogen energy storage and transportation equipment, the traditional slow stretching method has significant limitations in the evaluation of hydrogen embrittlement: the electrochemical hydrogen charging process causes the hydrogen concentration in the sample lattice to be significantly higher than the hydrogen exposure level of oil and gas pipeline steel in actual environmental service. Due to the concentration dependence of the material hydrogen damage mechanism, this hydrogen supersaturated state will cause the hydrogen embrittlement phenomenon of the material to be over-amplified. Summary of the Invention

[0004] In order to solve the technical problem in the prior art that the influence of hydrogen on the mechanical properties of materials in a low-concentration gaseous hydrogen service environment cannot be reflected due to the easy occurrence of hydrogen supersaturation in the material, the embodiments of the present invention provide a method and system for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation. The technical solution is as follows:

[0005] On the one hand, a method for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation is provided. The method includes: placing multiple groups of specimens to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature; the groups of specimens to be tested include multiple specimens to be tested; the specimens to be tested include pipeline steel for hydrogen-doped transportation; performing standard slow tensile tests on the multiple groups of specimens to be tested respectively to obtain the average stress-strain curves of each group of specimens to be tested under the corresponding hydrogen pressure; based on the average stress-strain curves, calculating the average elongation after fracture, the average yield strength, and the average tensile strength of each group of specimens to be tested respectively; using the average elongation after fracture, the average yield strength, and the average tensile strength as the parameters characterizing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped transportation to characterize the hydrogen embrittlement phenomenon of the specimens to be tested under different hydrogen pressures.

[0006] Optionally, placing multiple groups of specimens to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature includes: placing multiple groups of specimens to be tested in different high-temperature and high-pressure hydrogen autoclaves respectively, and controlling the temperatures of different high-temperature and high-pressure hydrogen autoclaves to be the same test temperature; performing pre-hydrogen charging on each high-temperature and high-pressure hydrogen autoclave respectively, and controlling different hydrogen pressures to be achieved inside different high-temperature and high-pressure hydrogen autoclaves.

[0007] Optionally, performing standard slow tensile tests on the multiple groups of specimens to be tested respectively to obtain the average stress-strain curves of each group of specimens to be tested under the corresponding hydrogen pressure includes: performing tensile tests on each specimen to be tested in each group of specimens to be tested at a constant loading rate until the specimen to be tested fractures, and respectively recording the load, displacement signal, and fracture time of each specimen to be tested during the tensile test; based on the load, displacement signal, and fracture time of each specimen to be tested during the tensile test, obtaining the average stress-strain curve of the corresponding group of specimens to be tested.

[0008] Optionally, the value range of the hydrogen pressure includes 6 MPa - 10 MPa; the value range of the test temperature includes 300 °C - 500 °C.

[0009] Optionally, the number of groups of specimens to be tested is at least three, and each group of specimens to be tested includes at least two specimens to be tested.

[0010] Optionally, the pipeline steel for hydrogen-doped transportation includes L245QS steel.

[0011] On the other hand, a characterization system for the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation is also provided, which is used to implement the method for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation provided by the embodiments of the present invention. The system includes: a setting module, a test module, a calculation module, and a characterization module. Among them, the setting module is used to place multiple groups of specimens to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature. Each group of specimens to be tested includes multiple specimens to be tested, and each specimen to be tested includes pipeline steel for hydrogen-doped transportation. The test module is used to perform a standard slow tensile test on each of the multiple groups of specimens to be tested to obtain the average stress-strain curve of each group of specimens to be tested under the corresponding hydrogen pressure. The calculation module is used to calculate the average elongation after fracture, average yield strength, and average tensile strength of each group of specimens to be tested based on the average stress-strain curve. The characterization module is used to use the average elongation after fracture, average yield strength, and average tensile strength as parameters for characterizing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped transportation to characterize the hydrogen embrittlement phenomenon of the specimens to be tested under different hydrogen pressures.

[0012] Optionally, the test module is further used to: perform a tensile test on each specimen to be tested in each group of specimens to be tested at a constant loading rate until the specimen to be tested fractures, and record the load, displacement signal, and fracture time of each specimen to be tested during the tensile test respectively; based on the load, displacement signal, and fracture time of each specimen to be tested during the tensile test, obtain the average stress-strain curve of the corresponding group of specimens to be tested.

[0013] On the other hand, an electronic device is also provided, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method provided by the embodiments of the present invention is implemented.

[0014] On the other hand, a computer-readable storage medium is also provided. The computer-readable storage medium stores program code, and the program code can be called by a processor to execute the method provided by the embodiments of the present invention.

[0015] The embodiments of the present invention provide a method and system for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation. The material is pre-charged with hydrogen in a hydrogen environment for a period of time to fully simulate the actual service environment of the pipeline steel, and a standard slow tensile test is used to stretch the specimen to fracture, thereby obtaining the stress-strain curve, yield strength, tensile strength, elongation rate and other mechanical properties of the specimen, so as to obtain the parameters for characterizing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped transportation. The present invention can better reflect the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped transportation under the actual use state. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 It is a flowchart of a method for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation provided by an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the average stress-strain curves corresponding to multiple groups of specimens to be tested provided by an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of a system for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation provided by an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Detailed implementation manners

[0021] The following will describe the technical solutions in the present invention in conjunction with the accompanying drawings.

[0022] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as an "example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of the word "example" is intended to present concepts in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one of the two.

[0023] To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 It is a flowchart of a method for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation provided by an embodiment of the present invention. As Figure 1 shown, the method specifically includes the following steps:

[0025] Step S102, placing multiple groups of specimens to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature; the groups of specimens to be tested include multiple specimens to be tested; the specimens to be tested include pipeline steel for hydrogen-doped transportation.

[0026] Specifically, placing multiple groups of specimens to be tested in different high-temperature and high-pressure hydrogen autoclaves respectively, and controlling the temperatures of different high-temperature and high-pressure hydrogen autoclaves to be the same test temperature;

[0027] Optionally, the test temperature ranges from 300°C to 500°C, preferably 400°C.

[0028] Pre-charge hydrogen into each high-temperature and high-pressure hydrogen autoclave respectively, and control different hydrogen pressures in different high-temperature and high-pressure hydrogen autoclaves. For example, the pre-charge hydrogen time is 24h.

[0029] Optionally, the hydrogen pressure ranges from 6MPa to 10MPa; for example, different hydrogen pressure values are selected as 6.3MPa, 8MPa, and 10MPa respectively.

[0030] Optionally, the pipeline steel for hydrogen-doped transportation includes L245QS steel.

[0031] Step S104, conduct standard slow tensile tests on multiple groups of specimens to be tested respectively, and obtain the average stress-strain curve of each group of specimens to be tested under the corresponding hydrogen pressure. Specifically, it further includes the following steps:

[0032] Step S1041, conduct tensile tests on each specimen to be tested in each group of specimens to be tested at a constant loading rate until the specimen to be tested fractures, and record the load, displacement signal, and fracture time of each specimen to be tested during the tensile test respectively;

[0033] Step S1042, based on the load, displacement signal, and fracture time of each specimen to be tested during the tensile test, obtain the average stress-strain curve of the corresponding group of specimens to be tested.

[0034] Step S106, based on the average stress-strain curve, calculate the average elongation after fracture, average yield strength, and average tensile strength of each group of specimens to be tested respectively.

[0035] Step S108, use the average elongation after fracture, average yield strength, and average tensile strength as the parameters characterizing the hydrogen embrittlement phenomenon of the pipeline steel for hydrogen-doped transportation, and characterize the hydrogen embrittlement phenomenon of the specimens to be tested under different hydrogen pressures.

[0036] In an optional implementation manner provided by the embodiments of the present invention, the number of groups of specimens to be tested is at least three, and each group of specimens to be tested includes at least two specimens to be tested.

[0037] The embodiments of the present invention take six specimens to be tested divided into three groups of specimens to be tested and in hydrogen environments with three different hydrogen pressures as an example to illustrate the specific test process of the method provided by the embodiments of the present invention:

[0038] a. Prepare 6 standard slow-stretching specimens to be tested, numbered #1 - #6 respectively. Combine specimen #1 and #2 into a specimen group to be tested, specimen #3 and #4 into a second specimen group to be tested, and specimen #5 and #6 into a third specimen group to be tested. The material of the specimens to be tested is L245QS steel, and a vernier caliper is used to measure the gauge length and the specimen diameter.

[0039] b. Install specimen #1 and #2 to be tested on a slow-stretching testing machine with a high-temperature and high-pressure hydrogen autoclave. Then, control the temperature of the high-temperature and high-pressure hydrogen autoclave at 400 °C, design the hydrogen charging pressure to be controlled at 6.3 MPa, and break the specimen to be tested at a strain rate of 0.036552 mm / min. Record the load and displacement signals, and record the time required for the specimen to be tested to stretch to fracture.

[0040] c. Install specimen #3 and #4 to be tested on a slow-stretching testing machine with a high-temperature and high-pressure hydrogen autoclave. Design the hydrogen charging pressure to be controlled at 8 MPa, and keep the other conditions unchanged. Record the load and displacement signals, and record the time required for the specimen to be tested to stretch to fracture.

[0041] d. Install specimen #5 and #6 to be tested on a slow-stretching testing machine with a high-temperature and high-pressure hydrogen autoclave. Design the hydrogen charging pressure to be controlled at 10 MPa, and keep the other conditions unchanged. Record the load and displacement signals, and record the time required for the specimen to be tested to stretch to fracture.

[0042] e. Obtain the average stress-strain curves of specimens #1 - #6 to be tested, as Figure 2 shown, and calculate the average yield strength, average tensile strength, and average elongation at fracture corresponding to each specimen group to be tested respectively.

[0043] According to the above experimental results and the appendix Figure 2 It can be obtained that in the above method:

[0044] The average elongation after fracture δ of specimen #1 and #2 to be tested Havg is 32.99%, the average yield strength σ Yavg is 300.99 MPa, and the average tensile strength σ Savg is 429.86 MPa;

[0045] The average elongation after fracture δ of specimen #3 and #4 to be tested Havg is 31.88%, the average yield strength σ Yavg is 306.87 MPa, and the average tensile strength σ Savg is 430.14 MPa;

[0046] The average elongation after fracture δ of specimen #5 and #6 to be tested Havg is 27.52%, the average yield strength σ Yavgis 324.58 MPa, and the average tensile strength σ Savg is 457.56 MPa.

[0047] It can be seen that as the environmental hydrogen pressure gradually increases, the elongation rate of the specimen to be tested gradually decreases, the yield strength and tensile strength continuously increase, the brittleness of the material continuously increases, and the hydrogen embrittlement phenomenon of the material becomes more and more obvious.

[0048] In addition, the method of the present invention characterizes the mechanical properties of the hydrogen-doped pipeline steel such as yield strength, tensile strength, elongation rate, etc. under specific hydrogen pressure and temperature environments, and can more accurately reflect the strength index and hydrogen embrittlement phenomenon of the hydrogen-doped pipeline steel under the actual service state.

[0049] Figure 3 is a schematic diagram of a system for characterizing the hydrogen embrittlement performance of hydrogen-doped pipeline steel according to an embodiment of the present invention, and is used to implement the method for characterizing the hydrogen embrittlement performance of hydrogen-doped pipeline steel provided by the embodiment of the present invention. As Figure 3 shown, the system includes: a setting module 10, a test module 20, a calculation module 30, and a characterization module 40.

[0050] Specifically, the setting module 10 is used to place multiple groups of specimens to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature; each group of specimens to be tested includes multiple specimens to be tested; the specimens to be tested include hydrogen-doped pipeline steel;

[0051] The test module 20 is used to perform a standard slow tensile test on multiple groups of specimens to be tested respectively, and obtain the average stress-strain curve of each group of specimens to be tested under the corresponding hydrogen pressure;

[0052] The calculation module 30 is used to calculate the average elongation after fracture, average yield strength, and average tensile strength of each group of specimens to be tested respectively based on the average stress-strain curve;

[0053] The characterization module 40 is used to characterize the hydrogen embrittlement phenomenon of the specimens to be tested under different hydrogen pressures by using the average elongation after fracture, average yield strength, and average tensile strength as the parameters for characterizing the hydrogen embrittlement phenomenon of the hydrogen-doped pipeline steel.

[0054] Specifically, the test module 20 is further used for:

[0055] Performing a tensile test on each specimen of each group of specimens to be tested at a constant loading rate until the specimen to be tested fractures, and respectively recording the load, displacement signal, and fracture time of each specimen during the tensile test;

[0056] Based on the load, displacement signal, and fracture time of each specimen during the tensile test, obtaining the average stress-strain curve of the corresponding group of specimens to be tested.

[0057] As can be seen from the above description, the embodiments of the present invention provide a method and a system for characterizing the hydrogen embrittlement performance of pipeline steel for hydrogen-doped transportation. Compared with the prior art, the following technical effects are achieved:

[0058] (1) According to the service characteristics of pipeline steel for hydrogen-doped transportation in a hydrogen environment, the present invention first pre-charges hydrogen in a hydrogen environment for a period of time to fully simulate the actual service environment of pipeline steel, and uses a standard slow tensile test to stretch the specimen until fracture, thereby obtaining the stress-strain curve, yield strength, tensile strength, elongation and other mechanical properties of the specimen, and thus obtaining the hydrogen embrittlement phenomenon characterization parameters of pipeline steel for hydrogen-doped transportation.

[0059] (2) In the traditional electrochemically pre-charged hydrogen slow tensile test, under the action of ionization and poison, the permeability of hydrogen ions inside the material is greatly improved, making the hydrogen content inside the material close to saturation. The hydrogen embrittlement phenomenon characterization parameters obtained thereby reflect the influence of hydrogen on the mechanical properties of the material when the material is in a high-concentration hydrogen content, and cannot reflect the influence of hydrogen on the mechanical properties of the material in a low-concentration gaseous hydrogen service environment. The test method adopted by the present invention simulates the gaseous hydrogen pressure environment during the service of pipeline steel for hydrogen doping and characterizes the influence of hydrogen on the mechanical properties of the material in this state. Therefore, the hydrogen embrittlement phenomenon characterization parameters obtained by the test method adopted by the present invention can better reflect the hydrogen embrittlement phenomenon of pipeline steel for hydrogen-doped transportation in the actual use state.

[0060] Figure 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As Figure 4 shown, it includes: a memory 401, a processor 402, and a computer program stored on the memory 401 and executable on the processor 402. When the processor 402 executes the computer program, the method provided by the embodiment of the present invention is implemented.

[0061] The present invention also provides a computer-readable storage medium, in which program code is stored, and the program code can be called by a processor to execute the method provided by the embodiment of the present invention.

[0062] It should be understood that the memory in the embodiments of the present invention can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DR RAM).

[0063] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that contains one or more collections of available media. The available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media. The semiconductor media can be a solid-state drive.

[0064] It should be understood that in various embodiments of the present invention, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0065] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0066] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the devices, apparatuses, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here.

[0067] In several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed with each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0068] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0069] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0070] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0071] As described above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for characterizing hydrogen embrittlement performance of hydrogen-doped pipeline steel, characterized in that: The method comprises: Placing a plurality of test sample groups in hydrogen environments with different hydrogen pressures and at the same test temperature; the test sample groups include a plurality of test samples; the test samples include pipeline steel for hydrogen-doped transportation; Performing standard slow tensile tests on the plurality of test sample groups respectively to obtain an average stress-strain curve of each test sample group under a corresponding hydrogen pressure; Based on the average stress-strain curve, the average elongation after fracture, the average yield strength and the average tensile strength of each group of samples to be tested are calculated respectively; The average elongation after fracture, the average yield strength and the average tensile strength are used as parameters for characterizing the hydrogen embrittlement phenomenon of the hydrogen-doped transportation pipeline steel, and the hydrogen embrittlement phenomenon of the test sample under different hydrogen pressures is characterized.

2. The method according to claim 1, characterized in that Multiple test sample groups are placed in hydrogen environments with different hydrogen pressures and the same test temperature, including: Placing a plurality of test sample groups in different high-temperature and high-pressure hydrogen kettles respectively, and controlling the temperatures of the different high-temperature and high-pressure hydrogen kettles to be the same test temperature; Each high-temperature and high-pressure hydrogen kettle is pre-filled with hydrogen respectively, and different high-temperature and high-pressure hydrogen kettles are controlled to reach different hydrogen pressures.

3. The method according to claim 1, characterized in that Performing standard slow tensile tests on the plurality of test sample groups respectively to obtain an average stress-strain curve of each test sample group under a corresponding hydrogen pressure, including: Performing a tensile test on each test sample in each test sample group at a constant loading rate until the test sample breaks, and recording the load, displacement signal and fracture time of each test sample during the tensile test; Based on the load, displacement signal and fracture time of each sample to be tested during the tensile test, the average stress-strain curve of the corresponding group of samples to be tested is obtained.

4. The method according to claim 1, characterized in that: The hydrogen pressure has a value range of 6MPa-10MPa; The test temperature ranges from 300°C to 500°C.

5. The method according to claim 1, characterized in that The number of the groups of samples to be tested is at least three, and each group of samples to be tested includes at least two samples to be tested.

6. The method according to claim 1, characterized in that The pipeline steel for hydrogen-blended transportation includes L245QS steel.

7. A characterization system for hydrogen embrittlement performance of hydrogen-doped pipeline steel, characterized in that: A method for characterizing hydrogen embrittlement performance of hydrogen-doped pipeline steel according to any one of claims 1 to 6; the system comprises: a setting module, a test module, a calculation module and a characterization module; wherein, The setting module is used to place multiple groups of samples to be tested in hydrogen environments with different hydrogen pressures and at the same test temperature; the groups of samples to be tested include multiple samples to be tested; the samples to be tested include pipeline steel for hydrogen-doped transportation; The test module is used to perform a standard slow tensile test on the plurality of test sample groups respectively to obtain an average stress-strain curve of each test sample group under a corresponding hydrogen pressure; The calculation module is used to calculate the average elongation after fracture, the average yield strength and the average tensile strength of each group of samples to be tested based on the average stress-strain curve; The characterization module is used to characterize the hydrogen embrittlement phenomenon of the test sample under different hydrogen pressures by using the average elongation after fracture, the average yield strength and the average tensile strength as parameters for characterizing the hydrogen embrittlement phenomenon of the hydrogen-doped transportation pipeline steel.

8. The system according to claim 7, characterized in that The test module is also used for: Performing a tensile test on each test sample in each test sample group at a constant loading rate until the test sample breaks, and recording the load, displacement signal and fracture time of each test sample during the tensile test; Based on the load, displacement signal and fracture time of each sample to be tested during the tensile test, the average stress-strain curve of the corresponding group of samples to be tested is obtained.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program codes, which can be called by a processor to execute the method according to any one of claims 1 to 6.

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