Hydrogen embrittlement detection method and device

Abstract

The invention provides a hydrogen embrittlement detection method and device. The method comprises the following steps: arranging a to-be-tested part to abut against a first supporting part and a second supporting part, wherein the first supporting part and the second supporting part are both located on the first side of the to-be-tested part and are spaced apart from each other; applying pressure to the to-be-measured part between the first supporting part and the second supporting part on a second side, opposite to the first side, of the to-be-measured part, so that the to-be-measured part generates and keeps a preset deformation amount in the direction facing the first side; if the to-be-detected part cracks within the preset time after the preset deformation amount is generated, it is determined that the to-be-detected part has the hydrogen embrittlement defect, otherwise, the pressure is removed after the preset time, and whether the to-be-detected part has the hydrogen embrittlement defect or not is determined according to the actual deformation amount of the to-be-detected part after the pressure is removed and a first reference value; the predetermined deformation amount is such that after the pressure is removed, the actual deformation amount of the part without the hydrogen embrittlement defect is less than a first reference value, and the actual deformation amount of the part with the hydrogen embrittlement defect is greater than the first reference value.

Description

Technical Field

[0001] This application relates to the field of material testing, and more specifically, to a hydrogen embrittlement detection method and device. Background Art

[0002] Hydrogen embrittlement, also known as hydrogen-induced delayed cracking, refers to the phenomenon that materials (usually metals and their alloys) have a significant decline in mechanical properties, especially a decrease in toughness and an increase in brittleness, in a hydrogen environment or due to the intrusion of hydrogen. Therefore, hydrogen embrittlement is a very important consideration in engineering applications. However, in related technologies, most of the detection methods for hydrogen embrittlement are destructive detections, that is, the parts after detection cannot be reused, resulting in increased losses and costs. Summary of the Invention

[0003] This application provides a hydrogen embrittlement detection method and device, thereby enabling non-destructive hydrogen embrittlement detection.

[0004] In a first aspect, a hydrogen embrittlement detection method is provided. The method uses three-point bending detection to achieve hydrogen embrittlement detection. In the three-point bending detection, a first support portion and a second support portion are used to support a part to be tested. The method includes: arranging the part to be tested to abut against the first support portion and the second support portion, wherein the first support portion and the second support portion are both located on a first side of the part to be tested and are spaced apart from each other; on a second side of the part to be tested, between the first support portion and the second support portion, applying a pressure to the part to be tested so that the part to be tested generates and maintains a predetermined deformation amount in a direction towards the first side, wherein the second side is the side of the part to be tested opposite to the first side; if the part to be tested cracks within a predetermined time after generating the predetermined deformation amount, it is determined that the part to be tested has a hydrogen embrittlement defect, otherwise, after the predetermined time, the pressure is removed, and it is determined whether the part to be tested has a hydrogen embrittlement defect according to the actual deformation amount of the part to be tested after removing the pressure and a first reference value, wherein the predetermined deformation amount is such that after removing the pressure, the deformation amount of a part without a hydrogen embrittlement defect is less than the first reference value, and the deformation amount of a part with a hydrogen embrittlement defect is greater than the first reference value.

[0005] In a possible implementation, the method further includes: in the case of determining that the part to be tested has a hydrogen embrittlement defect, determining the degree of hydrogen embrittlement of the part to be tested according to the actual deformation amount and a second reference value.

[0006] In a possible implementation, the part to be tested has a beam-like or plate-like shape.

[0007] In a possible implementation, the actual deformation amount is the permanent deformation amount of the part to be measured in the direction towards the first side after removing the pressure.

[0008] In a second aspect, a hydrogen embrittlement detection device is provided. The hydrogen embrittlement detection device includes: a first clamping portion, including a first supporting portion and a second supporting portion, with a first concave portion provided between the first supporting portion and the second supporting portion for accommodating the part to be measured when the part to be measured deforms; a second clamping portion, fixedly connected to and oppositely arranged with the first clamping portion to form an accommodation space for arranging the part to be measured between the first clamping portion and the second clamping portion. The second clamping portion includes a third supporting portion and a fourth supporting portion oppositely arranged with the first supporting portion and the second supporting portion respectively, and a second concave portion is provided between the third supporting portion and the fourth supporting portion; a driving portion, configured to use the space in the second concave portion to apply pressure to the part to be measured between the first supporting portion and the second supporting portion, so that the part to be measured generates and maintains a predetermined deformation amount in the direction towards the first concave portion.

[0009] In a possible implementation, the hydrogen embrittlement detection device further includes a first adapter portion and a second adapter portion. Among them, the first adapter portion is configured to be arranged between the first supporting portion and the third supporting portion and detachably connected to the first supporting portion, and the second adapter portion is configured to be arranged between the second supporting portion and the fourth supporting portion and detachably connected to the second supporting portion. The thicknesses of the first adapter portion and the second adapter portion are such that the part to be measured can be clamped between the first clamping portion and the second clamping portion.

[0010] In a possible implementation, the portion of the first adapter portion facing the third supporting portion and the portion of the second adapter portion facing the fourth supporting portion are both arc-shaped surfaces.

[0011] In a possible implementation, the driving portion is a bolt, and a first through hole is provided at the bottom of the second concave portion. The first through hole has internal threads for forming a threaded assembly with the bolt.

[0012] In a possible implementation, the hydrogen embrittlement detection device further includes an intermediate member. The first side of the intermediate member is an arc-shaped surface, and the other side of the intermediate member opposite to the first side has internal threads for forming a threaded assembly with the top of the screw rod of the bolt.

[0013] In a possible implementation, the first side surface of the third supporting portion away from the second concave portion and the second side surface of the fourth supporting portion away from the second concave portion are both downward inclined surfaces for accommodating the part to be measured when the part to be measured deforms.

[0014] In a possible implementation, the hydrogen embrittlement detection device further includes a distance measurement device. Wherein, a second through hole is provided at the bottom of the first recess, and the distance measurement device measures the deformation amount of the part to be measured by using the second through hole and the space in the first recess; and / or, the hydrogen embrittlement detection device further includes a fixing part, wherein both the first clamping part and the second clamping part are fixedly connected to the fixing part, so that the first clamping part and the second clamping part are fixedly connected.

[0015] In a third aspect, a hydrogen embrittlement detection device is provided, which includes: a memory for storing a program; and a processor for calling and executing the program stored in the memory, so that the hydrogen embrittlement detection device can execute the method according to the first aspect and any of its implementation manners.

[0016] In a fourth aspect, a computer-readable storage medium is provided, on which a program is stored, and the program is used to execute the method according to the first aspect and any of its implementation manners.

[0017] In a fifth aspect, a chip is provided, which includes a processor, and the processor is used to call and run a program from a memory, so that a device installed with the chip can execute the method according to the first aspect and any of its implementation manners.

[0018] In a sixth aspect, a computer program product is provided, which includes a program, and the program is used to execute the method according to the first aspect and any of its implementation manners.

[0019] Through the implementation manners of the present application, since in the three-point bending test, a predetermined deformation amount is generated on the part to be measured, and this predetermined deformation amount enables a part without hydrogen embrittlement defects to return to the initial state after the pressure is removed (that is, the actual deformation amount is less than the first reference value), and a part with hydrogen embrittlement defects will have irreversible deformation. Therefore, parts with hydrogen embrittlement defects can be screened out according to the deformation situation of the part to be measured after the pressure is removed. Among them, since the part without hydrogen embrittlement defects only undergoes reversible deformation, it can be reused, and finally non-destructive hydrogen embrittlement detection is realized. Description of the Drawings

[0020] Figure 1 It is a schematic flowchart of a hydrogen embrittlement detection method provided by an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of a three-point bending test provided by an embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the relationship between the thickness of the part to be measured and the predetermined deformation amount provided by an embodiment of the present application.

[0023] Figure 4 The structural schematic diagram of the hydrogen embrittlement detection device provided by an embodiment of the present application.

[0024] Figure 5 For Figure 4 The enlarged schematic diagram of the base of the hydrogen embrittlement detection device shown.

[0025] Figure 6 The schematic structural block diagram of the hydrogen embrittlement detection device provided by an embodiment of the present application. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application should fall within the scope of protection of the present application.

[0027] Referring to "embodiments" herein means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Hydrogen embrittlement, also known as hydrogen-induced delayed cracking, refers to the phenomenon that the mechanical properties of materials (usually metals and their alloys) are significantly degraded in a hydrogen environment or due to the intrusion of hydrogen, especially the reduction of toughness and the increase of brittleness. For example, a part does not crack during manufacturing, but over time, due to the continuous intrusion and diffusion of hydrogen atoms, the brittleness of the material in the part increases and the strength decreases, eventually leading to the fracture of the material. In this process, hydrogen plays a role in promoting crack initiation and propagation. Therefore, hydrogen embrittlement is a very important consideration in engineering applications.

[0030] As an example, hydrogen embrittlement is a very important consideration in the field of high-strength steel. For example, high-strength steel is often used in the automotive field and is the preferred material for body structural components. During multiple processes such as pickling, plating, heat treatment, and service of high-strength steel, hydrogen will penetrate into its matrix. The presence of diffused hydrogen atoms not only affects the service life of automotive structural components but is also directly related to the collision safety of automotive structural components, that is, the critical fracture strain of the body structural components will decrease due to the increase in diffused hydrogen atoms.

[0031] Furthermore, the hydrogen embrittlement sensitivity of ultra-high-strength steel will increase significantly with the increase in the strength level of the steel. For example, hydrogen embrittlement behavior will occur when the strength of the steel plate is greater than 1000 MPa, and the hydrogen embrittlement phenomenon is more obvious when the strength exceeds 1500 MPa. Steels with a strength exceeding 1500 MPa generally have a fully martensitic structure. This structure increases the strength and hardness of the steel, but also increases the grain boundaries and phase boundaries, providing more crack propagation paths and increasing the possibility of hydrogen embrittlement. Secondly, due to the relatively complex lattice structure of martensitic steel, there are many micro-defects and phase interfaces in it. These defects and interfaces can promote the adsorption and diffusion of hydrogen atoms, resulting in an increase in the hydrogen concentration and an increase in the risk of hydrogen embrittlement. Moreover, martensitic steel is usually used in high-strength and high-stress engineering applications, and there are often large stress concentration areas in these application scenarios. Hydrogen atoms are prone to aggregation under high stress to form hydrogen atom clusters, which will further weaken the toughness and ductility of the steel, thus increasing the probability of hydrogen embrittlement. Therefore, hydrogen embrittlement is also an important consideration for the research, application, and development of ultra-high-strength steel with a strength of 1500 MPa and above.

[0032] From the above, whether it is high-strength or ultra-high-strength steel, hydrogen embrittlement is a very important consideration. It should be understood that only the field of steel is taken as an example above to introduce that hydrogen embrittlement is an important consideration in the field of engineering applications. However, it is easy to understand that hydrogen embrittlement is an important consideration in other fields, such as the storage and transportation of hydrogen energy, the petrochemical field, the aerospace field, the chemical engineering field, and so on. Therefore, this application is also applicable to these other hydrogen embrittlement-related fields.

[0033] In this case, how to evaluate the hydrogen embrittlement characteristics of materials has become an urgent problem to be solved.

[0034] However, most of the hydrogen embrittlement detection methods in the related technologies are destructive detections. For example, the detection method commonly used by related domestic enterprises is the "U-shaped constant bending load test method for hydrogen-induced delayed fracture sensitivity of ultra-high strength automotive steel plates". This method is a destructive detection, and the tested plates cannot be used again. Further, the position where cracking is detected by this method is often not the position with the most concentrated stress, resulting in low evaluation accuracy. Moreover, the experimental time of this method is generally 300 hours, and the cycle is too long. Another example is that Patent CN202311215441.9 "Test and evaluation method for hydrogen embrittlement resistance of high-strength steel plate materials" and Patent CN202310988824.3 "Evaluation method for hydrogen-induced delayed fracture resistance of high-strength steel plates" disclose hydrogen embrittlement detection methods, but they are all destructive experimental methods, unable to achieve non-destructive detection. At the same time, the experimental steps are cumbersome, the experimental cycle is long, and the accuracy is not high.

[0035] The destructive hydrogen embrittlement detection in the related technologies will directly cause many problems. For example, the destructive hydrogen embrittlement detection makes the tested parts unable to be used or reused again. Therefore, it is difficult to detect all parts, and only sampling detection methods can be adopted. However, on the one hand, the sampling detection method itself has defects, which may cause some parts with hydrogen embrittlement defects not to be detected, and the detection accuracy is not high; on the other hand, in the case of destructive detection, although it is sampling detection, it still causes certain part losses and increases the cost.

[0036] Due to the problems such as losses and costs caused by destructive hydrogen embrittlement detection, it may cause some industrial application fields to directly ignore the hydrogen embrittlement detection of materials. Still taking the steel in the automotive field as an example, currently, the evaluation methods at the material level or part level for collision fracture of body structure parts do not mention the influence of hydrogen content, which brings great errors to the safety performance design and evaluation of body structure parts.

[0037] In summary, a non-destructive hydrogen embrittlement detection means is needed to solve the above-mentioned technical problems.

[0038] The embodiment of the present application utilizes the three-point bending hydrogen embrittlement detection principle to make the part to be tested generate a predetermined deformation amount. This predetermined deformation amount enables the part without hydrogen embrittlement defects to return to the initial state (for example, the deformation amount is less than a specific value) after removing the pressure applied to the part to be tested, while the part with hydrogen embrittlement defects will undergo irreversible deformation due to the increased brittleness of the material. Therefore, the parts with hydrogen embrittlement defects can be screened out according to the deformation situation of the part to be tested after removing the pressure. Among them, since the part without hydrogen embrittlement defects only generates reversible deformation, it can be reused, and finally non-destructive hydrogen embrittlement detection is achieved.

[0039] In addition, since there is no need to go through a long process such as chemical or physical analysis, the non-destructive hydrogen embrittlement detection in the embodiments of the present application can also quickly, accurately and objectively evaluate the hydrogen embrittlement situation of parts.

[0040] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings of the specification.

[0041] Figure 1 FIG. is a schematic flowchart of a hydrogen embrittlement detection method 100 provided by an embodiment of the present application. The method 100 uses three-point bending detection to achieve hydrogen embrittlement detection, and a first support portion and a second support portion are used to support the part to be tested in the three-point bending detection. As Figure 1 shown, the hydrogen embrittlement detection method 100 may include steps S110 to S130.

[0042] Step S110: Arrange the part to be tested to abut against the first support portion and the second support portion, wherein the first support portion and the second support portion are both located on the first side of the part to be tested and are spaced apart from each other.

[0043] Step S120: Apply a pressure to the part to be tested between the first support portion and the second support portion on the second side of the part to be tested, so that the part to be tested generates and maintains a predetermined deformation amount in the direction towards the first side, wherein the second side is the side of the part to be tested opposite to the first side.

[0044] Step S130: If the part to be tested cracks within a predetermined time after generating the predetermined deformation amount, it is determined that the part to be tested has a hydrogen embrittlement defect; otherwise, the pressure is removed after the predetermined time, and it is determined whether the part to be tested has a hydrogen embrittlement defect according to the actual deformation amount of the part to be tested after the pressure is removed and a first reference value, wherein the predetermined deformation amount is such that after the pressure is removed, the actual deformation amount of a part without a hydrogen embrittlement defect is less than the first reference value, and the actual deformation amount of a part with a hydrogen embrittlement defect is greater than the first reference value.

[0045] It should be understood that in steps S110 to S130, the shape or structure of the part to be tested can be any shape or structure suitable for three-point bending detection. For example, the part to be tested can have a beam-like or plate-like shape. Alternatively, the part to be tested can have a certain curvature, or have other shapes that are easily conceivable by those skilled in the art, as long as it is suitable for three-point bending detection.

[0046] It should be understood that in steps S110 to S130, the spatial relationship between the first support portion, the second support portion, the part to be tested, and the position where the pressure is applied to the part to be tested only needs to satisfy the principle of three-point bending detection.

[0047] For example, Figure 2 shows a schematic diagram of three-point bending detection provided by an embodiment of the present application. As Figure 2As shown, the first support portion 211 and the second support portion 212 are located on the same side of the part 220 to be measured for supporting the part 220 to be measured. The driving portion 230 is configured to apply pressure to the part 220 to be measured between the first support portion 211 and the second support portion 212 on the other side of the part 220 to be measured, so that the part 220 to be measured generates a predetermined deformation amount L1 toward the side where the first support portion 211 and the second support portion 212 are located.

[0048] Please note that in Figure 2 , the portions of the first support portion 211 and the second support portion 212 in contact with the part 220 to be measured both have arc-shaped surfaces, which is beneficial to protecting the part 220 to be measured from damage during the three-point bending test. Optionally, the first support portion 211 and the second support portion 212 may have the same arc-shaped surface, which can make the contact points of the part 220 to be measured with the first support portion 211 and the second support portion 212 generate substantially the same movement during the three-point bending test, thus being beneficial to more accurately monitoring the predetermined deformation amount L1. However, it should be understood that the shapes and arrangements of the components of the embodiments of the present application are not limited to Figure 2 the situation shown, as long as the shapes of the first support portion 211, the second support portion 212, and the driving portion 230 and the spacing between them are suitable for performing the three-point bending test.

[0049] Please note that in Figure 2 , the driving portion 230 applies pressure to the part 220 to be measured at a position substantially in the middle between the first support portion 211 and the second support portion 212, which is beneficial to ensuring that the part 220 to be measured is uniformly stressed along the entire length, thus being beneficial to more accurately monitoring the predetermined deformation amount L1. However, it should be understood that the embodiments of the present application are not limited to applying pressure at the middle position. For example, the structure or material of the part 220 to be measured may be asymmetric, and in this case, the force application point can be adjusted to deviate from the middle position to better achieve the three-point bending test.

[0050] In step S120 and step S130, the predetermined deformation amount can enable a part without hydrogen embrittlement defects to return to the initial state after the pressure is removed, or the actual deformation amount of a part without hydrogen embrittlement defects is less than the first reference value, while a part with hydrogen embrittlement defects undergoes irreversible deformation, or the actual deformation amount is greater than the first reference value. Among them, the predetermined deformation amount can be determined by combining the three-point bending test with other hydrogen embrittlement detection means in related technologies.

[0051] As an example, the predetermined deformation amount can be determined in the following manner: First, set a first deformation amount (for example, 3 mm), and obtain the same first sample and second sample of a certain sample part for comparison with each other; Next, use the first sample for the above-mentioned three-point bending test to obtain the actual deformation amount. Among them, in the three-point bending test, make the first sample reach and maintain the set first deformation amount for a predetermined time; Then, determine whether the second sample has a hydrogen embrittlement defect through other hydrogen embrittlement detection means, that is, it is equivalent to determining whether the first sample has a hydrogen embrittlement defect; Finally, record the first deformation amount, the actual deformation amount, and the corresponding hydrogen embrittlement condition (for example, whether there is a hydrogen embrittlement defect) of the sample part. Similarly, repeat the above operations for other sample parts to obtain the hydrogen embrittlement conditions of a large number of sample parts and the corresponding actual deformation amounts under the condition of the first deformation amount. Therefore, it can be determined whether the sample part without hydrogen embrittlement defect can return to the initial state (or, the actual deformation amount is less than the first reference value, for example, 0.5 mm or 1 mm) under the condition of the first deformation amount, and whether the sample part with hydrogen embrittlement defect has undergone irreversible deformation (or, the actual deformation amount is greater than the first reference value), so as to determine whether the above first deformation amount can be used as the predetermined deformation amount of the part to be tested for screening parts with hydrogen embrittlement defects and parts without hydrogen embrittlement defects through the three-point bending test. Note that during the process of repeating the above operations, the detection conditions of the three-point bending test, the specifications of the first sample and the second sample (for example, shape, size, etc.) and / or other hydrogen embrittlement detection means and their conditions, etc., should be kept unchanged.

[0052] Similarly, a second deformation amount different from the first deformation amount can be set in sequence, and the above operations can be repeated to determine whether the sample part without hydrogen embrittlement defect can return to the initial state and whether the sample part with hydrogen embrittlement defect has undergone irreversible deformation under the set second deformation amount. If the set second deformation amount enables the part without hydrogen embrittlement defect to return to the initial state and the part with hydrogen embrittlement defect to undergo irreversible deformation, then the set second deformation amount can be used as the predetermined deformation amount of the part to be tested. Thus, the predetermined deformation amount or the range of the predetermined deformation amount that can be used for the part to be tested can be finally obtained. For example, specific to the size of the part to be tested and the conditions of the three-point bending test, etc., the determined range of the predetermined deformation amount is 2 mm to 4 mm. Then, when a certain value between 2 mm and 4 mm is selected as the predetermined deformation amount, the part without hydrogen embrittlement defect can return to the original state in the three-point bending test under the corresponding conditions, while the part with hydrogen embrittlement defect will undergo irreversible deformation, and thus the identification of the part with hydrogen embrittlement defect can be achieved.

[0053] It should be understood that the above method for determining the predetermined deformation amount is only an example. Based on the principles disclosed in this application, those skilled in the art can easily think of other specific methods to determine the predetermined deformation amount. For example, the same sample of the part to be tested can be first used for three-point bending testing, and then repeatedly used for other hydrogen embrittlement detection means to obtain its corresponding hydrogen embrittlement condition.

[0054] Other hydrogen embrittlement detection means in the related art may include tensile tests, preloading tests, electrochemical detection methods, ultrasonic detection, electron microscope observation, hydrogen charging tests, etc. that are familiar to those skilled in the art. This application does not specifically limit which other hydrogen embrittlement detection means are specifically used, as long as the other hydrogen embrittlement detection means used remain unchanged during the process of determining the predetermined deformation amount.

[0055] For a specific part to be tested, through the above method of determining the predetermined deformation amount, it can be known that the predetermined deformation amount is usually related to the thickness of the part, the material of the part itself, etc. For example, Figure 3 shows a schematic diagram of the relationship between the thickness of the part to be tested provided in an embodiment of this application and the predetermined deformation amount. As Figure 3 shown, the magnitude of the predetermined deformation amount increases as the thickness of the part to be tested increases. In addition, the predetermined deformation amount may also be related to the material of the part to be tested itself, the distance between the two supporting parts in the three-point bending test method, etc. To avoid obscuring the main idea of this application, it will not be elaborated here.

[0056] In step S130, if the part to be tested cracks within the predetermined time after generating the predetermined deformation amount, it is considered that the part to be tested is a part with a hydrogen embrittlement defect, and the detection can be stopped at this time. Otherwise, the applied pressure can be removed after the predetermined time, and it is determined whether the part to be tested has a hydrogen embrittlement defect based on the actual deformation amount of the part to be tested after removing the pressure and the first reference value. For example, if the actual deformation amount of the part to be tested is less than the first reference value, it is considered that the part to be tested is a part without a hydrogen embrittlement defect; otherwise, it is considered that the part to be tested is a part with a hydrogen embrittlement defect.

[0057] Please note that in the above hydrogen embrittlement detection method 100, on the premise that the part to be tested with an actual deformation amount less than the first reference value can still be reused, the first reference value can be determined by various methods. For example, the first reference value can be determined by a certain statistical method. As an example, after obtaining the actual deformation amounts of a large number of sample parts in the three-point bending test, a 95% confidence interval can be set, and based on the statistical distribution of the actual deformation amounts of the sample parts without hydrogen embrittlement defects, the first reference value can be determined.

[0058] Note that in the above hydrogen embrittlement detection method 100, the deformation amount of the part to be tested (including the predetermined deformation amount and the actual deformation amount) can be measured by the spatial position change of a certain point or part of the part to be tested relative to its initial position during or after the force application process. Optionally, the vertical displacement of the force application point or the midpoint of the sample to be tested can be selected for measurement. However, it should be understood that those skilled in the art can also select other parameters in the art (such as deflection, strain, angle change, etc.) to measure the deformation amount of the part to be tested, and the present application does not limit this.

[0059] Note that in the above hydrogen embrittlement detection method 100, the predetermined time can be determined by those skilled in the art according to specific requirements. The determination of the predetermined time is usually related to various factors such as the material, size and shape of the part to be tested, and the magnitude of the predetermined deformation amount. Generally speaking, if the predetermined time is too short, it may cause the parts with hydrogen embrittlement defects not to undergo sufficient deformation, which will affect their final actual deformation amount and ultimately affect the accuracy of the hydrogen embrittlement detection method 100. If the predetermined time is too long, even much longer than the time required for the parts with hydrogen embrittlement defects to fully deform, this will lead to a reduction in the detection efficiency. Through experimental verification, the predetermined time can be selected, for example, 48 hours, 72 hours, and so on.

[0060] Note that in the above hydrogen embrittlement detection method 100, the actual deformation amount of the part to be tested can be the permanent deformation amount of the part to be tested after the pressure is removed. As an example, after the pressure is removed, the part to be tested can be left standing for a period of time, such as 15 minutes. At this time, the obtained actual deformation amount can be regarded as the permanent deformation amount of the part to be tested. It should be understood that those skilled in the art can determine how long after the pressure is removed to measure the actual deformation amount of the part to be tested according to the specific conditions such as the material and shape of the part to be tested.

[0061] In some embodiments, the above hydrogen embrittlement detection method 100 may further include: when it is determined that the part to be tested has a hydrogen embrittlement defect, determining the degree of hydrogen embrittlement of the part to be tested according to the actual deformation amount and the second reference value. As an example, when using other hydrogen embrittlement detection means of related technologies above to detect the hydrogen embrittlement condition of the sample part, the detected hydrogen embrittlement condition can be divided into no hydrogen embrittlement defect, low hydrogen embrittlement defect, and high hydrogen embrittlement defect, and at the same time, the actual deformation amount of the sample part corresponding to its hydrogen embrittlement condition and the predetermined deformation amount is obtained and recorded. Then, according to the corresponding relationship between the predetermined deformation amount, the actual deformation amount, and the hydrogen embrittlement condition of a large number of obtained sample parts, a second reference value (for example, using the statistical method when determining the first reference value) for distinguishing, for example, low hydrogen embrittlement defects and high hydrogen embrittlement defects can be further obtained. Thus, after it is determined that the part to be tested is a part with a hydrogen embrittlement defect according to the actual deformation amount and the first reference value, the degree of hydrogen embrittlement of the part to be tested can be further determined according to the actual deformation amount and the second reference value of the part to be tested, for example, whether it is a part with a low hydrogen embrittlement defect or a part with a high hydrogen embrittlement defect. For example, the first reference value is 0.5 mm, and the second reference value is 3 mm. Thus, when the actual deformation amount of the part to be tested is less than 0.5 mm, the part to be tested is a part without a hydrogen embrittlement defect; when the actual deformation amount of the part to be tested is greater than or equal to 0.5 mm and less than 3 mm, the part to be tested is a part with a low hydrogen embrittlement defect; when the actual deformation amount of the part to be tested is greater than or equal to 3 mm, the part to be tested is a part with a high hydrogen embrittlement defect. It should be understood that the above division of the hydrogen embrittlement condition of the part to be tested and the numerical values of the first reference value and the second reference value are only examples, and those skilled in the art can determine other division methods of the hydrogen embrittlement degree and the corresponding reference values according to needs.

[0062] Through the above method embodiments of the present application, the problem that the parts cannot be reused after hydrogen embrittlement detection in related technologies can be solved. The embodiments of the present application can control the deformation amount in the three-point bending detection within a certain range (for example, 4 mm), that is, by controlling the deformation amount in the three-point bending detection to the set predetermined deformation amount, the part without a hydrogen embrittlement defect can return to the initial state (for example, the actual deformation amount is less than the first reference value) after the pressure is removed, so that it can be reused, achieving the purpose of non-destructive detection. However, the part with a hydrogen embrittlement defect will have increased material brittleness due to the occurrence of hydrogen embrittlement phenomenon, resulting in irreversible deformation (for example, the actual deformation amount is greater than the first reference value), and thus can be detected.

[0063] In addition, other hydrogen embrittlement detection means in related technologies often involve long chemical or physical analysis processes. However, in the above embodiments of the present application, the hydrogen embrittlement condition of the part to be tested can be quickly determined according to the actual deformation amount of the part to be tested, realizing rapid hydrogen embrittlement evaluation.

[0064] In addition, in the embodiments of the present application, when the shape, size (such as thickness) of the part to be measured is certain, according to the predetermined deformation amount, actual deformation amount and reference values (for example, the first reference value and the second reference value) under these conditions, the hydrogen embrittlement condition of the part to be measured can be accurately obtained.

[0065] The method embodiments of the present application have been described in detail above in conjunction with Figures 1 to 3 Next, the device embodiments of the present application will be described in conjunction with Figures 4 to 6 It should be understood that the descriptions of the method embodiments and the device embodiments correspond to each other. Therefore, for the parts not described in detail, reference can be made to the previous method embodiments.

[0066] In an embodiment of the present application, a hydrogen embrittlement detection device 400 is provided. The hydrogen embrittlement detection device 400 may include: a first clamping portion 510, including a first supporting portion 511 and a second supporting portion 512, with a first concave portion 530 provided between the first supporting portion 511 and the second supporting portion 512 for accommodating the part to be measured when the part to be measured deforms; a second clamping portion 520, fixedly connected to and oppositely arranged with the first clamping portion 510 to form an accommodation space for arranging the part to be measured between the first clamping portion 510 and the second clamping portion 520. The second clamping portion 520 includes a third supporting portion 521 and a fourth supporting portion 522 respectively oppositely arranged with the first supporting portion 511 and the second supporting portion 512, and a second concave portion 540 is provided between the third supporting portion 521 and the fourth supporting portion 522; a driving portion 430, configured to use the space in the second concave portion 540 to apply pressure to the part to be measured between the first supporting portion 511 and the second supporting portion 512, so that the part to be measured generates and maintains a predetermined deformation amount in the direction towards the first concave portion 530.

[0067] In some embodiments, the hydrogen embrittlement detection device 400 may further include a first adapter portion 451 and a second adapter portion 452. Among them, the first adapter portion 451 is configured to be disposed between the first supporting portion 511 and the third supporting portion 521 and detachably connected to the first supporting portion 511, and the second adapter portion 452 is configured to be disposed between the second supporting portion 512 and the fourth supporting portion 522 and detachably connected to the second supporting portion 512. The thicknesses of the first adapter portion 451 and the second adapter portion 452 are such that the part to be measured can be clamped between the first clamping portion 510 and the second clamping portion 520. By adjusting the thicknesses of the first adapter portion 451 and the second adapter portion 452, the hydrogen embrittlement detection device 400 can be used for three-point bending hydrogen embrittlement detection of parts with different thicknesses, thereby expanding the applicable range of the hydrogen embrittlement detection device 400.

[0068] It is easy to understand that the first adaptation part 451 and the second adaptation part 452 can be detachably connected to the first support part 511 and the second support part 512 respectively by various means. For example, the first adaptation part 451 and the second adaptation part 452 can be connected to the first support part 511 and the second support part 512 respectively by means of slot connection, threaded connection, bonding, etc. In this regard, those skilled in the art can make a choice according to actual needs, and this application does not make any limitations thereto.

[0069] In some embodiments, the first adaptation part 451 and the second adaptation part 452 can be made of rigid materials, so that when pressure is applied to the part to be measured, the part to be measured will not generate additional displacement due to the deformation of the first adaptation part 451 and the second adaptation part 452 themselves, thereby improving the measurement accuracy of the deformation amount of the part to be measured.

[0070] In some embodiments, the part of the first adaptation part 451 facing the third support part 521 and the part of the second adaptation part 452 facing the fourth support part 522 are both arc-shaped surfaces. By providing arc-shaped surfaces, the part to be measured can be protected from damage when pressure is applied. Optionally, the arc-shaped surfaces of the first adaptation part 451 and the second adaptation part 452 can be set to the same arc-shaped surface. Thus, during the process of applying pressure, the contact points of the part to be measured with the first adaptation part 451 and the second adaptation part 452 can produce approximately the same movement, thereby facilitating the accurate measurement of the deformation amount of the part to be measured.

[0071] In some embodiments, the driving part 430 can be a bolt, and a first through hole 550 is provided at the bottom of the second recess 540. The first through hole 550 has internal threads for forming a threaded assembly with the bolt. By rotating the bolt, the screw rod of the bolt can be adjusted to approach or leave the part to be measured, thereby applying or removing pressure to the part to be measured. However, it is easy for those skilled in the art to think that the driving part 430 can also be implemented by other means in the art. For example, the driving part 430 can be implemented by a hydraulic pump, a gear transmission device, a syringe-type driving device, etc.

[0072] In some embodiments, the hydrogen embrittlement detection device 400 may further include an intermediate member 440. The first side of the intermediate member 440 is an arc surface, and the other side of the intermediate member 440 opposite to the first side has an internal thread for forming a threaded assembly with the top of the screw of the bolt. Through the intermediate member 440, the pressure applied by the bolt can be transmitted to the part to be tested, and since the intermediate member 440 contacts and applies pressure to the part to be tested through the first side with an arc surface, damage to the part to be tested can be reduced. However, it should be understood that in addition to one side being an arc surface, those skilled in the art can easily think that the intermediate member 440 can also have other shapes or structures. For example, one side of the intermediate member 440 is square or other polygonal shapes, and the other side has an internal thread for threaded assembly with the screw of the bolt. In addition, in some embodiments, the intermediate member 440 can be an elastic member, so as to reduce damage to the part to be tested during the process of applying pressure to the part to be tested.

[0073] In some embodiments, the first side surface 560 of the third supporting portion 521 away from the second recess 540 and the second side surface 570 of the fourth supporting portion 522 away from the second recess 540 are both downward inclined surfaces for accommodating the part to be tested when the part to be tested deforms. As a further illustration, referring back Figure 2 , when pressure is applied to the part to be tested 220 at the position between the first supporting portion 211 and the second supporting portion 212, the portion of the part to be tested 220 that extends beyond the first supporting portion 211 and the second supporting portion 212 will bend in the direction opposite to the pressure direction. By a similar principle, by providing a downward inclined surface on the outer sides of the third supporting portion 521 and the fourth supporting portion 522, when the part to be tested is deformed by the applied pressure, the portion of the part to be tested that extends beyond the first supporting portion 511 and the second supporting portion 512 can be prevented from being blocked by the third supporting portion 521 and the fourth supporting portion 522, thus facilitating three-point bending hydrogen embrittlement detection and accurately measuring the deformation amount of the part to be tested.

[0074] In some embodiments, the hydrogen embrittlement detection device 400 may further include a distance measuring device 420. Wherein, a second through hole 580 is provided at the bottom of the first recess 530, and the distance measuring device 420 uses the second through hole 580 and the space in the first recess 530 to measure the deformation amount of the part to be tested. For example, the distance measuring device 420 can be a micrometer (for example, purchased from Harbin Measuring Tool Works Group Co., Ltd., abbreviated as "Haliang"). The micrometer can pass through the second through hole 580 and the first recess 530 to measure the deformation amount of the part to be tested when needed. It should be understood that in addition to the micrometer, those skilled in the art can easily think of other types of distance measuring devices to measure the deformation amount of the part to be tested, such as distance sensors, optical measuring means, etc., and the present application does not make specific limitations thereto.

[0075] By including the distance measuring device 420, it is convenient to obtain the deformation amount of the part to be measured in real time, so as to facilitate real-time monitoring of whether the part to be measured reaches the predetermined deformation amount, and thus facilitate more rapid determination of the hydrogen embrittlement condition of the part to be measured.

[0076] In some embodiments, the hydrogen embrittlement detection device 400 may further include a fixing portion 590. Among them, the first clamping portion 510 and the second clamping portion 520 are both fixedly connected to the fixing portion 590, so that the first clamping portion 510 and the second clamping portion 520 are fixedly connected. For example, the fixing portion 590 may be a substrate, and the substrate may have various shapes. For example, the substrate may be a rectangular substrate, an "I"-shaped substrate, etc. The first clamping portion 510 and the second clamping portion 520 may be fixedly connected to each other by being fixedly connected to the fixing portion 590. Optionally, the first clamping portion 510 and the second clamping portion 520 may be integrally formed with the substrate, so as to realize the fixed connection between the first clamping portion 510 and the second clamping portion 520. However, it should be understood that those skilled in the art can easily think of other ways to fixedly connect the first clamping portion 510 and the second clamping portion 520, such as fixed connection by bolts, etc., and the present application does not make specific limitations on this.

[0077] Through the above device embodiments of the present application, the above method embodiments of the present application can be applied to realize rapid non-destructive hydrogen embrittlement detection.

[0078] Continue to refer below Figure 4 and Figure 5 , and more specifically introduce a device embodiment of the present application and a complete hydrogen embrittlement detection process based on this device embodiment.

[0079] First, provide the hydrogen embrittlement detection device 400. As Figure 4As shown, the hydrogen embrittlement detection device 400 may include a base 410, a distance measurement device 420, a driving part 430, an intermediate part 440, and an adapter part 450. Among them, the base 410 may include a first clamping part 510 and a second clamping part 520 which are oppositely arranged, and a fixing part 590, and is integrally formed by the first clamping part 510, the second clamping part 520, and the fixing part 590. The distance measurement device 420 may be a micrometer, the driving part 430 may be a bolt (for example, an M16 bolt). The upper side of the intermediate part 440 may be hemispherical and its lower side is flat and provided with internal threads for being arranged on the top of the screw of the bolt and forming a threaded assembly therewith (therefore, the intermediate part 440 may also be called a top ball), and the adapter part 450 may include a first adapter part 451 and a second adapter part 452. Further, the first clamping part 510 may include a first supporting part 511 and a second supporting part 512, and a first concave part 530 is arranged between the first supporting part 511 and the second supporting part 512 for accommodating the part to be measured when the part to be measured deforms. The lower sides of the first adapter part 451 and the second adapter part 452 are both arc-shaped surfaces and are detachably connected to the first supporting part 511 and the second supporting part 512 respectively by means of a card slot connection. The second clamping part 520 may include a third supporting part 521 and a fourth supporting part 522 which are oppositely arranged with the first supporting part 511 and the second supporting part 512 respectively, and a second concave part 540 is arranged between the third supporting part 521 and the fourth supporting part 522. A first through hole 550 is arranged at the bottom of the second concave part 540, and the first through hole 550 is provided with internal threads for forming a threaded assembly with the screw of the bolt. A second through hole 580 is arranged at the bottom of the first concave part 530. The micrometer may use the space in the second through hole 580 and the first concave part 530 to measure the deformation amount of the part to be measured. The first side surface 560 of the third supporting part 521 away from the second concave part 540 and the second side surface 570 of the fourth supporting part 522 away from the second concave part 540 may be downward inclined surfaces for accommodating the part to be measured when the part to be measured deforms. Particularly, the thicknesses of the first adapter part 451 and the second adapter part 452 can be adjusted so that the hydrogen embrittlement detection device 400 can be suitable for detecting parts to be measured with different thicknesses. In addition, the adapter part 450 and the top ball can be used as three fulcrums in the three-point bending hydrogen embrittlement detection (and thus, the adapter part 450 may also be called a forming block).

[0080] Next, before the detection, lower the top ball to the lowest point, and at the same time select the adapter part 450 that matches the thickness of the part to be measured to ensure that the straight section of the part to be measured can be clamped into the hydrogen embrittlement detection device 400. In addition, zero the micrometer.

[0081] Secondly, the detection process is carried out as follows: Slowly rotate the bolt to push the top ball upward and cause the part to be measured to start deforming. After the micrometer measures that the part to be measured reaches the predetermined deformation amount L1, the rotation of the bolt stops. At this time, record the start time of the detection. The predetermined deformation amount L1 can be related to the material thickness of the part to be measured. For example, the predetermined deformation amount L1 = 2 mm to 4 mm. If during the operation, the deformation amount of the part to be measured exceeds the predetermined deformation amount L1, the detection needs to start over and cannot continue by simply adjusting the deformation amount back.

[0082] Then, during the detection, keep the part to be measured at the predetermined deformation amount L1 for 72 hours, and during this period, the cracking state of the part to be measured needs to be observed. If the part to be measured cracks, the hydrogen embrittlement degree of the part to be measured exceeds the experimental value (i.e., the first reference value), and it is a part with hydrogen embrittlement defects. If no cracking occurs during this period, it is necessary to wait until the detection ends.

[0083] Finally, the detection ends: After keeping the part to be measured at the predetermined deformation amount L1 and reaching 72 hours, slowly rotate the bolt to lower the top ball. Then, let the part to be measured stand still for 15 minutes. Then, use a micrometer to measure the permanent deformation amount L2 of the part to be measured, that is, the actual deformation amount. Generally speaking, if the permanent deformation amount L2 is less than the experimental value, it can indicate that the part to be measured is a part without hydrogen embrittlement defects; if the permanent deformation amount L2 is greater than the experimental value, it can indicate that the part to be measured is a part with hydrogen embrittlement defects, and the hydrogen embrittlement degree of the part to be measured can be further obtained according to the database value (for example, the database value can include the corresponding relationship between the permanent deformation amount L2 and the hydrogen embrittlement degree).

[0084] It should be understood that in practical applications, those skilled in the art can easily think of various modifications or changes to the above embodiments. For example, changing the appearance of the hydrogen embrittlement detection device and its detection conditions. As an example, the size of the hydrogen embrittlement detection device and its components can be changed, a square top ball can be used, and the time for maintaining the predetermined deformation amount L1 can be changed, etc. However, these modifications do not change the fact of the three-point bending detection, and therefore these modifications or changes also fall within the scope of protection requested by this application.

[0085] Figure 6Also shown is a schematic structural block diagram of a hydrogen embrittlement detection device 600 provided by an embodiment of the present application. The hydrogen embrittlement detection device 600 may include a memory 610 and a processor 620. The memory 610 can be used to store programs, and the processor 620 can be used to call and run the programs stored in the memory 610, so that the hydrogen embrittlement detection device 600 can execute the following method: Arrange the part to be tested against a first support portion and a second support portion, where both the first support portion and the second support portion are located on the first side of the part to be tested and are spaced apart from each other; On the second side of the part to be tested, between the first support portion and the second support portion, apply a pressure to the part to be tested so that the part to be tested generates and maintains a predetermined deformation amount in the direction towards the first side, where the second side is the side of the part to be tested opposite to the first side; If the part to be tested cracks within a predetermined time after generating the predetermined deformation amount, it is determined that the part to be tested has a hydrogen embrittlement defect, otherwise, remove the pressure after the predetermined time, and determine whether the part to be tested has a hydrogen embrittlement defect according to the actual deformation amount of the part to be tested after removing the pressure and a first reference value, where the predetermined deformation amount is such that after removing the pressure, the actual deformation amount of a part without a hydrogen embrittlement defect is less than the first reference value, and the actual deformation amount of a part with a hydrogen embrittlement defect is greater than the first reference value.

[0086] Optionally, the method may further include: In the case of determining that the part to be tested has a hydrogen embrittlement defect, determine the degree of hydrogen embrittlement of the part to be tested according to the actual deformation amount and a second reference value.

[0087] Optionally, the actual deformation amount is the permanent deformation amount of the part to be tested in the direction towards the first side after removing the pressure.

[0088] An embodiment of the present application also provides a chip, including a processor, which can be used to call and run a computer program from a memory, so that a device installed with the chip executes the method described in the above method embodiment. It can be understood that the processor can be any type of processor. It can be understood that the memory can be independent of the chip or integrated in the chip.

[0089] An embodiment of the present application also provides a computer-readable storage medium for storing a program, and the program enables a computer to execute the methods in the various method embodiments of the present application.

[0090] An embodiment of the present application also provides a computer program product. The computer program product includes a program, and the program enables a computer to execute the methods in the various method embodiments of the present application.

[0091] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it 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. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present disclosure 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 machine-readable storage medium or transmitted from one machine-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 in a wired manner (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The machine-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 includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a Digital Video Disc (DVD)), or a semiconductor medium (such as a Solid State Disk (SSD)), etc.

[0092] Those of ordinary skill in the art will realize that the units and algorithm steps of the examples described in conjunction with the embodiments of the present disclosure can be implemented in electronic hardware or in a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software 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 disclosure.

[0093] In several embodiments provided by the present disclosure, it should be understood that the disclosed systems, devices, 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, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in an electrical, mechanical, or other form.

[0094] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed across 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.

[0095] In addition, each functional unit in various embodiments of the present disclosure may be integrated in a processing unit, may exist physically alone for each unit, or two or more units may be integrated in one unit.

[0096] As described above, only the specific implementation manners of the present disclosure are provided, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the appended claims.

Claims

1. A method for detecting hydrogen embrittlement, characterized in that: The method uses a three-point bending test to implement hydrogen embrittlement detection, wherein a first support portion and a second support portion are used to support a part to be tested in the three-point bending test, and the method includes: Arranging the part to be measured to abut against the first supporting portion and the second supporting portion, wherein the first supporting portion and the second supporting portion are both located at a first side of the part to be measured and are spaced apart from each other; Applying pressure to the part to be tested between the first supporting portion and the second supporting portion on the second side of the part to be tested, so that the part to be tested generates and maintains a predetermined deformation amount in the direction of the first side, wherein the second side is a side of the part to be tested opposite to the first side; If the part to be tested cracks within a predetermined time after the predetermined deformation occurs, it is determined that the part to be tested has a hydrogen embrittlement defect; otherwise, the pressure is removed after the predetermined time, and whether the part to be tested has a hydrogen embrittlement defect is determined based on the actual deformation of the part to be tested after the pressure is removed and the first reference value, The predetermined deformation amount is such that after the pressure is removed, the actual deformation amount of the part without hydrogen embrittlement defect is less than the first reference value, and the actual deformation amount of the part with hydrogen embrittlement defect is greater than the first reference value.

2. The method according to claim 1, characterized in that The method further includes: when it is determined that the part to be tested has a hydrogen embrittlement defect, determining the degree of hydrogen embrittlement of the part to be tested according to the actual deformation amount and the second reference value.

3. The method according to claim 1 or 2, characterized in that: The actual deformation is the permanent deformation of the part to be tested in the direction toward the first side after the pressure is removed.

4. A hydrogen embrittlement detection device (400), characterized in that: The hydrogen embrittlement detection device (400) comprises: A first clamping portion (510) comprises a first supporting portion (511) and a second supporting portion (512), wherein a first recess (530) is provided between the first supporting portion (511) and the second supporting portion (512) for accommodating the part to be tested when the part to be tested is deformed; A second clamping portion (520) is fixedly connected to the first clamping portion (510) and arranged opposite to the first clamping portion (510), so as to form a receiving space for arranging the part to be tested between the first clamping portion (510) and the second clamping portion (520), the second clamping portion (520) comprising a third supporting portion (521) and a fourth supporting portion (522) respectively arranged opposite to the first supporting portion (511) and the second supporting portion (512), a second recess (540) being arranged between the third supporting portion (521) and the fourth supporting portion (522); The driving part (430) is used to utilize the space in the second recess (540) to apply pressure to the part to be tested between the first supporting part (511) and the second supporting part (512), so that the part to be tested generates and maintains a predetermined deformation amount in the direction of the first recess (530).

5. The device (400) according to claim 4, characterized in that The invention also comprises a first adapter portion (451) and a second adapter portion (452), wherein the first adapter portion (451) is used to be arranged between the first supporting portion (511) and the third supporting portion (521), and is detachably connected to the first supporting portion (511); the second adapter portion (452) is used to be arranged between the second supporting portion (512) and the fourth supporting portion (522), and is detachably connected to the second supporting portion (512); the thickness of the first adapter portion (451) and the thickness of the second adapter portion (452) enable the part to be tested to be clamped between the first clamping portion (510) and the second clamping portion (520).

6. The device (400) according to claim 5, characterized in that The portion of the first adapter portion (451) facing the third supporting portion (521) and the portion of the second adapter portion (452) facing the fourth supporting portion (522) are both arc-shaped surfaces.

7. The device (400) according to any one of claims 4 to 6, characterized in that The driving portion (430) is a bolt, and a first through hole (550) is provided at the bottom of the second recess (540), wherein the first through hole (550) has an internal thread for forming a threaded assembly with the bolt.

8. The device (400) according to claim 7, characterized in that It also includes a middle piece (440), a first side of which is an arc-shaped surface, and the other side of the middle piece (440) opposite to the first side has an internal thread for forming a threaded assembly with the top of the screw rod of the bolt.

9. The device (400) according to any one of claims 4 to 6, characterized in that The first side surface (560) of the third supporting portion (521) away from the second recess (540) and the second side surface (570) of the fourth supporting portion (522) away from the second recess (540) are both downwardly inclined surfaces, so as to accommodate the part to be measured when the part to be measured is deformed.

10. The device (400) according to any one of claims 4 to 6, characterized in that The hydrogen embrittlement detection device (400) further comprises a distance measuring device (420), wherein a second through hole (580) is provided at the bottom of the first recess (530), and the distance measuring device (420) uses the second through hole (580) and the space within the first recess (530) to measure the deformation of the part to be tested; and / or The hydrogen embrittlement detection device (400) further includes a fixing portion (590), wherein the first clamping portion (510) and the second clamping portion (520) are both fixedly connected to the fixing portion (590), so that the first clamping portion (510) and the second clamping portion (520) are fixedly connected.

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