Hydrogen embrittlement rapid bending detection of hydrogen embrittlement insensitive material and detection sample processing method

Abstract

The invention relates to the technical field of hydrogen embrittlement bending detection, and discloses a hydrogen embrittlement rapid bending detection and detection sample processing method of a hydrogen embrittlement insensitive material, bending detection is performed on a bent sample by adopting a middle pressurizing bending mode, the pressing speed of a pressure head is increased, and due to the fact that the stress of the bent outer surface is not equal to the stress of the inner layer, the hydrogen embrittlement rapid bending detection is performed on the bent sample. The stress of the outermost layer is far greater than that of other parts, so that the force acting on the hydrogen-filled surface layer is far greater than that of the non-hydrogen-filled part of the inner layer, the proportion of the load borne by the material of the inner layer is much smaller, the plasticity index of the material is reduced, the brittleness can be amplified, and the hydrogen brittleness effect can be displayed more sensitively; when the bending sample is bent and deformed, the positioning pin is completely retracted into the lower template under the pressing of the lifting pin with a smaller diameter and cannot interfere with the deformation of the bending sample, and the bending sample is simple in structure, convenient to manufacture, relatively simple and feasible in processing work and testing operation, and relatively low in operation and implementation difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen embrittlement bending detection, in particular to a method for rapid hydrogen embrittlement bending detection of hydrogen embrittlement insensitive materials and a detection sample processing method. Background Art

[0002] Some materials that are insensitive to hydrogen embrittlement are widely used in hydrogen-related fields. For example, 6-series aluminum alloys are commonly used in hydrogen storage tanks and pipelines at the moment when new energy is popularized. Correspondingly, solving the hydrogen embrittlement detection problem of such materials has become more urgent. At present, the research on hydrogen embrittlement of materials insensitive to hydrogen embrittlement, such as 6-series aluminum alloys, is not in-depth, and the testing methods are relatively limited. Hydrogen embrittlement detection mainly uses tensile testing to observe the changes in plasticity indicators, that is, elongation or cross-sectional shrinkage. The process is generally to first make the aluminum alloy material into a tensile specimen, then hydrogenate it, and then perform a tensile test after hydrogenation to obtain comparative data of plasticity indicators to measure the impact of hydrogen embrittlement.

[0003] The conventional tensile test specimens are not very sensitive to hydrogen embrittlement, because the stress of the entire cross section of the specimen is evenly distributed, and the depth of hydrogen penetration only accounts for a small part of the cross-sectional area of ​​the specimen. Most of the load of the entire cross section is borne by the non-hydrogenated part. Even if hydrogen embrittlement occurs in the surface hydrogenated part, it cannot be very sensitive. The conventional bending test method has requirements for the bending loading speed during the test, which generally does not exceed 10-20mm / min. The conventional bending method can better reduce the influence of the non-hydrogenated part of the sample on the test results. However, due to the influence of the lower bending speed, the difference in internal and external bending stress is not obvious. The test results will still be affected by the non-hydrogenated part of the sample. There are still some deficiencies in the detection of hydrogen embrittlement insensitive materials. Therefore, a hydrogen embrittlement rapid bending test and test specimen processing method for hydrogen embrittlement insensitive materials are proposed. Summary of the invention

[0004] The object of the present invention is to provide a method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and a method for processing detection samples, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples, comprising the following steps:

[0006] S1. Sample cutting and cutting: cutting the bending specimen from the hydrogen embrittlement insensitive material according to the specific size;

[0007] S2. Sample processing: The cut bending sample is pre-processed. During processing, the six surfaces of the bending sample are polished with sandpaper. There is no requirement for polishing the front and rear end surfaces of the bending sample. The four narrow surfaces should be polished along the length direction. After polishing the upper A surface of the bending sample, the machining marks should be completely removed. Only the wear marks along the length direction can be observed on the surface by naked eye.

[0008] S3, electrolytic hydrogenation treatment, placing the ground bending specimen into an electrolytic cell for electrolytic hydrogenation treatment;

[0009] S4. Clamp and install the sample. Take out the bending sample after hydrogen charging treatment and position and install the bending sample on the upper part of the bending fixture. During installation, keep the A side of the bending sample facing downward, and align the bending line of the bending sample with the lower pressing structure of the bending fixture;

[0010] S5, bending test, use the bending tool to pressurize the middle part of the bending sample for bending test, make the lower pressure structure of the bending tool drop to 4-6mm above the bending sample and stop, then start to quickly bend the bending sample at a speed of 3-5mm / S until the pressure of the testing machine starts to drop, the lower pressure structure stops moving and unloads, and the bending sample is taken out;

[0011] S6. Bending angle measurement: remove the bent specimen, place the bent specimen on the upper part of the measuring table and measure and record the bending angle of the bent specimen.

[0012] Preferably, the bending tooling comprises an upper die mechanism and a lower die mechanism, and the lower die mechanism comprises a lower mold plate, a first locating pin, a second locating pin and a spring.

[0013] Preferably, a deformation groove is provided at the upper portion of the lower template, and the deformation groove is transversely penetrated and opened in the middle portion of the top side of the lower template, and the first positioning pin and the second positioning pin are both installed on the sides of the deformation groove.

[0014] Preferably, the first locating pin and the second locating pin are arranged in pairs, a pin mounting hole is provided on the upper portion of the lower template, and the first locating pin and the second locating pin are movably fitted and installed on the inner side of the pin mounting hole.

[0015] Preferably, the two second positioning pins are respectively located on both sides of the opening edge of the deformation groove, and the two first positioning pins are respectively located on both sides of the opening middle of the deformation groove.

[0016] Preferably, the spring is located inside the pin mounting hole, and the spring is mounted in abutment against the lower portions of the first positioning pin and the second positioning pin.

[0017] Preferably, the middle portion of the bending specimen spans the deformation groove and is supported and installed on the upper portion of the lower template, and the first positioning pin and the second positioning pin are respectively supported on two sides of the bending specimen.

[0018] Preferably, the upper mold mechanism is arranged on the upper part of the lower mold mechanism, and the upper mold mechanism includes an upper mold plate, a pressing head and an ejector pin.

[0019] Preferably, the pressing head is a pressing structure of a bending tool, the pressing head is fixedly mounted in the middle of the bottom side of the upper template, and the bottom end of the pressing head is a rounded structure.

[0020] Preferably, the number and position of the above-mentioned ejector pins correspond to the first positioning pin and the second positioning pin, and the ejector pin is fixedly installed at the lower part of the upper template. During bending detection, the bottom end of the ejector pin respectively contacts and fits with the upper ends of the first positioning pin and the second positioning pin.

[0021] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0022] 1. Aiming at the problem that hydrogen embrittlement-insensitive materials have poor hydrogen embrittlement sensitivity, the present invention adopts a rapid bending test method, adopts a middle-pressure bending method to perform bending detection on the bending specimen, and increases the pressing speed of the pressure head. When the rapid bending method is used for bending, since the stress on the outer surface of the bend is not equal to the stress on the inner layer, the stress on the outermost layer is much greater than that on other parts. Therefore, the force acting on the hydrogen-filled surface is much greater than that on the inner layer that is not hydrogen-filled. In this way, the load proportion borne by the inner layer material is much smaller, and the plasticity index of the material will decrease, that is, the brittleness can be amplified, and the effect of hydrogen embrittlement can be more sensitively displayed. If hydrogen embrittlement occurs on the surface, the brittleness effect can be more sensitively displayed, and the detection sensitivity of hydrogen embrittlement-insensitive materials can be improved, so as to better reflect the damage caused to the material after hydrogen penetration.

[0023] 2. A floating installation positioning structure is adopted, and the first positioning pin and the second positioning pin arranged on the upper part of the lower template are used to support and position the side of the bending specimen, so that the bending specimen can be installed quickly and accurately. A floating installation structure is adopted for both the first positioning pin and the second positioning pin. When the bending specimen is bent and deformed, the positioning pin is completely retracted into the lower template under the downward pressure of the ejector pin with a smaller diameter, and will not interfere with the deformation of the bending specimen, which is conducive to improving the detection accuracy of the device.

[0024] 3. The bottom end of the pressure head adopts a rounded structure to prevent the damage of the sample caused by excessive pressing speed. Combined with the rapid bending test method, multiple groups of bending samples can be quickly tested. The bending sample has a simple structure and is easy to prepare. The processing and testing operations are relatively simple and easy, with low operation and implementation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall detection process of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the bending tool of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the bending tooling of the present invention in the overall downward pressing detection state;

[0029] Figure 4 It is a schematic diagram of the top side planar structure of the lower template of the present invention;

[0030] Figure 5 It is a schematic diagram of the angle measurement schematic structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the distribution of the constant speed bending stress of the present invention;

[0032] Figure 7 It is a schematic diagram of the rapid bending stress distribution of the present invention;

[0033] Figure 8 It is a schematic diagram of the planar structure of the bending specimen of the present invention.

[0034] Explanation of the reference numerals: 1. bending specimen; 2. lower template; 3. first positioning pin; 4. second positioning pin; 5. spring; 6. upper template; 7. pressure head; 8. ejector pin; 9. deformation groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0037] Example

[0038] See also Figure 1-8 The present invention provides a technical solution: a method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and a method for processing detection samples, comprising the following steps:

[0039] S1. Sample cutting and cutting: Cut the bending sample 1 from the 6082 aluminum alloy plate according to a specific size. The bending sample 1 is cut from the product according to the size of 60mm×24mm×4mm, as shown in the attached Figure 8 As shown, the bending specimen 1 is a plate-shaped specimen with a thickness of 4 mm, a length of 60 mm, and a width of 24 mm. The bending line is located at the center line of the specimen, and the bending is performed along the bending line.

[0040] S2. Sample processing: The cut bending sample 1 is pre-processed. During processing, the six surfaces of the bending sample 1 are polished with 500# sandpaper. There is no requirement for polishing the front and rear end surfaces of the bending sample 1. The four narrow and long surfaces should be polished along the length direction. After polishing, the machining marks on the upper A surface of the bending sample 1 should be completely removed. Only the wear marks along the length direction can be observed on the surface by naked eye.

[0041] S3, electrolytic hydrogenation treatment, placing the ground bending specimen 1 into an electrolytic cell for electrolytic hydrogenation treatment;

[0042] S4. Sample clamping and installation. Take out the bending sample 1 after hydrogen charging treatment and position and install the bending sample 1 on the upper part of the bending tool. The bending tool includes an upper die mechanism and a lower die mechanism. The lower die mechanism includes a lower template 2, a first positioning pin 3, a second positioning pin 4 and a spring 5. The lower template 2 is used for the installation support of the bending sample 1. In order to facilitate the bending deformation of the bending sample 1, as shown in the attached figure, Figure 2 As shown, a deformation groove 9 is provided on the upper portion of the lower template 2 , and the deformation groove 9 is transversely penetrated and opened in the middle portion of the top side of the lower template 2 .

[0043] In order to install and position the bending specimen 1, as shown in the attached Figure 2As shown, the first locating pin 3 and the second locating pin 4 are both installed on the side of the deformation groove 9, and the first locating pin 3 and the second locating pin 4 are both arranged in pairs. In order to facilitate the connection and installation of the locating pins, a pin column mounting hole is provided on the upper part of the lower template 2. The first locating pin 3 and the second locating pin 4 are both movably fitted and installed on the inner side of the pin column mounting hole. The spring 5 is located on the inner side of the pin column mounting hole. The spring 5 is installed in contact with the lower part of the first locating pin 3 and the second locating pin 4. The spring 5 is installed in contact with the lower part of the locating pin, which can provide a reset elastic driving force for the telescopic sliding of the locating pin, as shown in the attached Figure 2 As shown, the two second locating pins 4 are respectively located on both sides of the opening edge of the deformation groove 9, and the two first locating pins 3 are respectively located on both sides of the opening middle of the deformation groove 9. When installing, keep the A side of the bending specimen 1 facing downward, the middle part of the bending specimen 1 spans the deformation groove 9 and is supported and installed on the upper part of the lower template 2, and the first locating pin 3 and the second locating pin 4 are respectively supported on both sides of the bending specimen 1. The first locating pin 3 and the second locating pin 4 arranged on the upper part of the lower template 2 are used to support and position the side of the bending specimen 1, so that the bending specimen 1 can be installed quickly and accurately.

[0044] The upper die mechanism is arranged on the upper part of the lower die mechanism, and the upper die mechanism comprises an upper die plate 6, a pressing head 7 and a ejector pin 8. Figure 3 As shown, the number and position of the ejector pins 8 correspond to the first positioning pins 3 and the second positioning pins 4, and the ejector pins 8 are fixedly installed at the lower part of the upper template 6. Figure 3 As shown, during the bending test, the bottom end of the top pin 8 is respectively in contact with the upper end of the first positioning pin 3 and the second positioning pin 4. The positioning pin can be retracted into the inner side of the pin column mounting hole by pressing down. Since the thickness of the sample is relatively thick, reaching 4mm, the elongation of the outer side of the sample will be relatively large when it is bent. In this way, at the beginning of the bending, the parts on the left and right sides of the plate that contact the positioning pins may interfere with the positioning pins due to elongation, which will affect the bending process and results. Therefore, a floating installation structure is adopted for the first positioning pin 3 and the second positioning pin 4. When the bending sample 1 is bent and deformed, the positioning pins The pin is completely retracted into the lower template 2 under the downward pressure of the ejector pin 8 with a smaller diameter. The diameter of the ejector pin 8 is 5mm, and the center lines of the two coincide. When working, the lower end face of the ejector pin 8 is first pressed on the upper end face of the positioning pin, and the positioning pin is continuously pressed downward. The height of the lower end face of the ejector pin 8 is 4.5mm lower than the height of the lowest end of the pressure head 7. In this way, it can be ensured that when the sample is bent, the positioning pin is completely retracted into the lower template 2 and will not interfere with the sample. The distance H between the lowest end of the pressure head 7 and the lower end face of the upper template 6 is large enough and will not interfere with the deformation of the bent sample 1, which is conducive to improving the detection accuracy of the device;

[0045] The pressure head 7 is a downward pressing structure of the bending tool. The pressure head 7 is fixedly installed in the middle of the bottom side of the upper template 6. In order to facilitate the downward pressing test of the bending sample 1, as shown in the attached Figure 2As shown, the bottom end of the pressure head 7 is a rounded structure, and the pressure head 7 adopts a rounded corner of R1.5mm instead of the 0.5mm sharp corner required by T / CSAE154-2020, which can prevent the damage of the sample caused by too small rounded corner radius and too high pressing speed. After installation, the bending line of the bent sample 1 is aligned with the pressure head 7 of the bending tooling up and down;

[0046] S5. Bending test: The middle part of the bending specimen 1 is subjected to pressurized bending test by using a bending fixture. During the test, the upper template 6 is driven by the press machine to move the pressure head 7 downward, so that the lower pressing structure of the bending fixture is lowered to 5mm above the bending specimen 1 and stops. Then, the bending specimen 1 is quickly bent at a speed of 4mm / S. The pressure head 7 is pressed on the bending line of the B surface of the bending specimen 1, and pressure is applied downward. At the same time, the top pin 8 of the upper template 6 presses down the first positioning pin 3 of the lower template 2 to prevent the first positioning pin 3 from affecting the bending process of the specimen. During bending, the length of the neutral layer of the material remains unchanged, and the neutral layer is located in the middle of the plate thickness, that is, 2mm. The material on the outside of the bending will stretch and the material on the inside will shorten until the pressure of the testing machine begins to drop, and the lower pressing structure stops moving. Move and unload, take out the bending sample 1, and perform bending test on the bending sample 1 by means of middle pressure bending, and increase the pressing speed of the pressure head 7. When the rapid bending method is used for bending, since the stress on the outer surface of the bending is not equal to the stress on the inner layer, the stress on the outermost layer is much greater than that on other parts, so the force acting on the hydrogen-filled surface is much greater than that on the inner layer that is not hydrogen-filled, so that the load proportion borne by the inner layer material is much smaller, and the plasticity index of the material will decrease, that is, the brittleness can be amplified, and the effect of hydrogen embrittlement can be more sensitively displayed. Then, the effects of rapid loading and wide plate are superimposed. If hydrogen embrittlement occurs on the surface, the brittleness effect can be more sensitively displayed, and the detection sensitivity of hydrogen embrittlement-insensitive materials can be improved, and the damage to the material caused by hydrogen penetration can be better reflected;

[0047] Bending speed and sample width are two important parameters. Different bending speeds and sample widths will significantly affect the maximum stress obtained at the bending part. First, when applying pressure, the pressing speed of the pressure head 7 is set to 4mm / S, which is about 20 times greater than the conventional bending test requirements. According to simulation research, when 6082 material is used and the pressing speed is set to 4mm / S, the maximum equivalent stress on the outermost side of the bending is 185MPa, while the stress at the conventional pressing speed is 162MPa. The stress of rapid bending is about 14.2% higher than that of conventional bending. See the attached figure for details. Figure 6 and 7 ;

[0048] Secondly, the ratio of the specimen width to thickness is also an important parameter. According to the definition, when the ratio of width to thickness is greater than 3, it is considered a wide plate, and when it is less than 3, it is considered a narrow plate. The stress states of wide and narrow plates during tension and bending are different. When the wide plate is bent, the stress combination state of its outer side is two-way tensile stress and one-way compressive stress, that is, two-way tensile stress along the length and width directions and one-way compressive stress along the thickness direction, which is more likely to show brittleness. The narrow plate is a combination of one-way tensile stress along the length direction and one-way compressive stress in the thickness direction, with better plasticity and not easy to be damaged.

[0049] Taking into account the experimental efficiency and the ease of specimen preparation, a wide plate with a width-to-thickness ratio of 6 times is used to make the specimen show greater brittleness. Table 1-1 below compares the maximum equivalent stress at the outermost part of the bend obtained through simulation of specimens with two widths of 4 mm thick plates using different bending speeds.

[0050] Table 1-1

[0051]

[0052] It can be seen that when the width of the sample reaches 6 times the thickness, i.e. 24 mm, and the bending speed reaches 20 times the conventional bending speed, the stress in the bending part is significantly increased, with a maximum increase of 21%.

[0053] S6. Bending angle measurement: remove the bent specimen 1, place the bent specimen 1 on the upper part of the measuring table, and measure and record the bending angle of the bent specimen 1. Figure 5 As shown, the angle β is used as an indicator to measure the degree of hydrogen embrittlement. The smaller the angle, the greater the brittleness and the more obvious the hydrogen embrittlement.

[0054] In summary, in order to solve the problem that hydrogen embrittlement-insensitive materials have poor hydrogen embrittlement sensitivity, the present invention adopts a rapid bending test method, adopts a middle-pressure bending method to perform bending detection on the bending sample 1, and increases the pressing speed of the pressure head 7. When the rapid bending method is used for bending, since the stress on the outer surface of the bend is not equal to the stress on the inner layer, the stress on the outermost layer is much greater than that on other parts. Therefore, the force acting on the hydrogen-filled surface is much greater than that on the inner layer that is not hydrogen-filled. In this way, the load proportion borne by the inner layer material is much smaller, and the plasticity index of the material will decrease, that is, the brittleness can be amplified, and the effect of hydrogen embrittlement can be more sensitively displayed. If hydrogen embrittlement occurs on the surface, the brittleness effect can be more sensitively displayed, and the detection sensitivity of hydrogen embrittlement-insensitive materials can be improved, and the damage to the material caused by hydrogen penetration can be better reflected. By using a floating installation positioning structure, the first positioning pin 3 and the second positioning pin 4 arranged on the upper part of the lower template 2 are used to support and position the side of the bending specimen 1, so that the bending specimen 1 can be installed quickly and accurately, and the first positioning pin 3 and the second positioning pin 4 are both installed in a floating structure. When the bending specimen 1 is bent and deformed, the positioning pin is completely retracted into the lower template 2 under the downward pressure of the top pin 8 with a smaller diameter, and will not interfere with the deformation of the bending specimen 1, which is beneficial to improve the detection accuracy of the device. The bottom end of the pressure head 7 adopts a rounded structure to prevent damage to the specimen that may be caused by excessive downward pressure speed. In combination with the rapid bending test method, multiple groups of bending specimens 1 can be subjected to rapid bending detection operations. The bending specimen 1 has a simple structure and is easy to manufacture. The processing work and test operations are relatively simple and easy, and have low operation and implementation difficulty.

[0055] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and a method for processing test specimens, characterized in that: The following steps are involved: S1. Cutting and cutting the specimen: cutting the bending specimen (1) from the hydrogen embrittlement insensitive material according to a specific size; S2. Sample processing: The cut bending sample (1) is pre-processed, and the six surfaces of the bending sample (1) are polished with sandpaper. There is no requirement for polishing the front and rear end surfaces of the bending sample (1). The four narrow and long surfaces should be polished along the length direction. After polishing, the upper A surface of the bending sample (1) should be completely polished to remove the machining marks. Only the wear marks along the length direction can be observed on the surface by naked eye. S3, electrolytic hydrogenation treatment, placing the ground bending specimen (1) into an electrolytic cell for electrolytic hydrogenation treatment; S4, clamping and installing the sample, taking out the bending sample (1) after the hydrogen charging treatment, and positioning and installing the bending sample (1) on the upper part of the bending tool, keeping the A side of the bending sample (1) facing downward during installation, and aligning the bending line of the bending sample (1) with the lower pressing structure of the bending tool; S5, bending test, using a bending tool to perform a pressurized bending test on the middle part of the bending sample (1), the lower pressing structure of the bending tool is lowered to a position 4-6 mm above the bending sample (1) and then stops, and then the bending sample (1) is quickly bent at a speed of 3-5 mm / s until the pressure of the testing machine begins to drop, the lower pressing structure stops moving and is unloaded, and the bending sample (1) is taken out; S6. Bending angle measurement: remove the bent sample (1), place the bent sample (1) on the upper part of the measuring table, and measure and record the bending angle of the bent sample (1).

2. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 1, characterized in that: The bending tool comprises an upper die mechanism and a lower die mechanism, and the lower die mechanism comprises a lower template (2), a first positioning pin (3), a second positioning pin (4) and a spring (5).

3. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 2, characterized in that: A deformation groove (9) is provided on the upper part of the lower template (2). The deformation groove (9) is transversely penetrated and opened in the middle of the top side of the lower template (2). The first positioning pin (3) and the second positioning pin (4) are both installed on the side of the deformation groove (9).

4. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 3, characterized in that: The first positioning pin (3) and the second positioning pin (4) are both arranged in pairs, and a pin column mounting hole is arranged on the upper part of the lower template (2). The first positioning pin (3) and the second positioning pin (4) are both movably mounted on the inner side of the pin column mounting hole.

5. The method for rapid bending detection of hydrogen embrittlement and detection sample processing of hydrogen embrittlement insensitive materials according to claim 4, characterized in that: The two second positioning pins (4) are respectively located on both sides of the opening edge of the deformation groove (9), and the two first positioning pins (3) are respectively located on both sides of the opening middle of the deformation groove (9).

6. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 5, characterized in that: The spring (5) is located on the inner side of the pin column mounting hole, and the spring (5) is mounted in contact with the lower parts of the first positioning pin (3) and the second positioning pin (4).

7. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 6, characterized in that: The middle part of the bending specimen (1) spans the deformation groove (9) and is supported and installed on the upper part of the lower template (2), and the first positioning pin (3) and the second positioning pin (4) are respectively supported on two sides of the bending specimen (1).

8. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 2, characterized in that: The upper die mechanism is arranged on the upper part of the lower die mechanism, and the upper die mechanism comprises an upper die plate (6), a pressing head (7) and an ejector pin (8).

9. The method for rapid bending detection of hydrogen embrittlement of hydrogen embrittlement insensitive materials and processing of detection samples according to claim 8, characterized in that: The pressing head (7) is a pressing structure of a bending tool, and the pressing head (7) is fixedly installed in the middle of the bottom side of the upper template (6). The bottom end of the pressing head (7) is a rounded structure.

10. The method for rapid bending detection of hydrogen embrittlement and detection sample processing of hydrogen embrittlement insensitive materials according to claim 9, characterized in that: The number and position of the ejector pins (8) correspond to the first positioning pins (3) and the second positioning pins (4). The ejector pins (8) are fixedly mounted on the lower part of the upper template (6). During bending detection, the bottom ends of the ejector pins (8) respectively contact and fit with the upper ends of the first positioning pins (3) and the second positioning pins (4).

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