A coaxial powder feeding repair method, device, medium and product of a hydrogenation reactor

Abstract

The application discloses a coaxial powder feeding repair method, equipment, medium and product of a hydrogenation reactor, relates to the field of low-alloy steel coaxial powder feeding repair, and through the following steps, the chemical components and test temperature of the hydrogenation reactor to be repaired are acquired; the fracture toughness of the hydrogenation reactor to be repaired is determined according to the chemical components and test temperature of the hydrogenation reactor to be repaired; the hydrogenation reactor to be repaired is subjected to dehydrogenation and preheating treatment; the fracture energy of the hydrogenation reactor to be repaired when containing hydrogen is determined according to the fracture toughness of the hydrogenation reactor to be repaired; the optimal welding process parameters are determined by using an extended finite element method according to the fracture toughness and the fracture energy when containing hydrogen of the hydrogenation reactor to be repaired; and the optimal powder feeding rate and the optimal overlap rate are determined by using orthogonal test according to the optimal welding process parameters, so that the coaxial powder feeding repair is carried out on the hydrogenation reactor to be repaired. The application improves the welding quality.

Description

Technical Field

[0001] This application relates to the field of coaxial powder feeding repair of low alloy steel, and in particular to a method, equipment, medium and product for coaxial powder feeding repair of a hydrogenation reactor. Background Technology

[0002] High manufacturing difficulty and harsh service environment are typical characteristics of hydrogenation reactors. Hydrogenation reactors using 2.25Cr1Mo steel have good creep resistance and fatigue resistance, and can operate stably for a long time under high temperature and high pressure. However, hydrogenation reactors have been in operation for a long time under high temperature (>400℃) and high pressure (>10Mpa) hydrogen-containing conditions. Hydrogen damage, leakage and explosion accidents have occurred from time to time. Problems such as hydrogen-induced deterioration and regenerated cracks have also occurred. Research on welding process, welding residual stress and the impact of post-weld heat treatment on performance, and hydrogen damage mechanism is relatively weak. Therefore, repairing 2.25Cr1Mo steel that has exceeded its service life can extend the service life of hydrogenation reactors and reduce costs.

[0003] Currently, there are very few methods for repairing hydrogenation reactors that have exceeded their service life. There are many ways to repair 2.25Cr1Mo steel, such as manual arc welding, laser welding, and soldering. However, in the case of exceeding the service life, i.e., in a high-temperature hydrogen-exposed state, the high temperature generated during the welding process will affect the microstructure and properties of the material, causing hardening or cracking in the weld joint area. In addition, the control of hydrogen in the weld area is a factor that leads to hydrogen embrittlement in the weld area, affecting the strength and toughness of the weld joint. Furthermore, the thermal stress generated during welding and the shrinkage during cooling will cause residual stress in the weld joint area, which is the main cause of crack propagation. These factors lead to limitations in welding quality. Summary of the Invention

[0004] The purpose of this application is to provide a method, equipment, medium, and product for coaxial powder feeding repair of a hydrogenation reactor, so as to improve the welding quality of the hydrogenation reactor.

[0005] To achieve the above objectives, this application provides the following solution:

[0006] In a first aspect, this application provides a coaxial powder feeding repair method for a hydrogenation reactor, comprising:

[0007] Obtain the chemical composition and test temperature of the hydrogenation reactor to be repaired;

[0008] The fracture toughness of the hydrogenation reactor to be repaired is determined based on its chemical composition and test temperature.

[0009] The hydrogenation reactor to be repaired was subjected to dehydrogenation and preheating treatment;

[0010] Based on the fracture toughness of the hydrogenation reactor to be repaired, determine the fracture energy of the hydrogenation reactor at hydrogen content.

[0011] Based on the fracture toughness and fracture energy of the hydrogenation reactor to be repaired, the optimal welding process parameters are determined using the extended finite element method. The optimal welding process parameters include laser power, welding speed, and spot diameter.

[0012] Based on the optimal welding process parameters, the optimal powder feeding rate and optimal overlap rate are determined using orthogonal experiments to perform coaxial powder feeding repair on the hydrogenation reactor to be repaired.

[0013] Optionally, the fracture toughness of the hydrogenation reactor to be repaired is determined based on its chemical composition and test temperature, specifically including:

[0014] Determine the J coefficient based on the chemical composition of the hydrogenation reactor to be repaired;

[0015] The ductile-brittle transition temperature value is determined based on the J coefficient.

[0016] The fracture toughness of the hydrogenation reactor to be repaired is determined based on the test temperature and the ductile-brittle transition temperature.

[0017] Optionally, the preheating treatment is performed at a heating temperature of 200°C and a holding time of 30 min to 2 h.

[0018] Optionally, the fracture energy of the hydrogen-containing reactor to be repaired is determined based on its fracture toughness, specifically including:

[0019] Based on the fracture toughness of the hydrogenation reactor to be repaired, the hydrogen concentration of the hydrogenation reactor to be repaired after dehydrogenation and preheating is determined using the relationship curve between hydrogen content and fracture toughness.

[0020] The hydrogen adhesion rate of the dehydrogenated and preheated hydrogenation reactor to be repaired is determined based on the hydrogen concentration.

[0021] The material fracture energy of the hydrogenation reactor to be repaired is determined based on the fracture toughness of the reactor.

[0022] The hydrogen adhesion rate and the material fracture energy are used to determine the hydrogen fracture energy of the hydrogenation reactor to be repaired when it contains hydrogen.

[0023] Optionally, the material fracture energy of the hydrogenation reactor to be repaired is determined based on its fracture toughness, specifically including:

[0024] Using formula Determine the material fracture energy of the hydrogenation reactor to be repaired; wherein, Gc (0) represents the material fracture energy of the hydrogenation reactor to be repaired; K IC denoted as , where is the fracture toughness of the hydrogenation reactor to be repaired; E is the elastic modulus of the hydrogenation reactor to be repaired; and v is the Poisson's ratio of the hydrogenation reactor to be repaired.

[0025] Optionally, the hydrogen adhesion rate and the material fracture energy are used to determine the hydrogen fracture energy of the hydrogenation reactor to be repaired at hydrogen content, specifically including:

[0026] Using formula G c (θ)=(1-1.0467θ+0.1687θ 2 )G c (0) Determine the hydrogen-containing time fracture energy of the hydrogenation reactor to be repaired; wherein, G c (θ) represents the fracture energy of the hydrogen-containing reactor to be repaired; G c (0) represents the material fracture energy of the hydrogenation reactor to be repaired; θ represents the hydrogen adhesion rate, θ = c / (c + 5.5), where c is the hydrogen concentration.

[0027] Optionally, it also includes: conducting a quality assessment of the repaired hydrogenation reactor, specifically including:

[0028] Residual stress tests were performed on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the transverse and longitudinal stress distributions and to conduct stress assessments.

[0029] Tensile tests were conducted on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the tensile strength, yield strength, yield ratio, and impact energy, and to conduct a strength assessment.

[0030] Toughness assessment was conducted based on the impact energy of the repaired area and the impact energy of the substrate in the repaired hydrogenation reactor.

[0031] Microstructural analysis was performed on the repaired area of ​​the hydrogenation reactor to evaluate its structure.

[0032] In a second aspect, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the coaxial powder feeding repair method for the hydrogenation reactor described in any one of the above-mentioned methods.

[0033] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the coaxial powder feeding repair method for the hydrogenation reactor described above.

[0034] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the coaxial powder feeding repair method for the hydrogenation reactor described above.

[0035] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0036] This application provides a method, equipment, medium, and product for coaxial powder feeding repair of a hydrogenation reactor. The method involves obtaining the chemical composition and test temperature of the hydrogenation reactor to be repaired; determining the fracture toughness of the reactor based on these parameters; performing dehydrogenation and preheating treatments on the reactor; determining the fracture energy of the reactor in hydrogen-containing conditions based on its fracture toughness; determining the optimal welding process parameters using the extended finite element method based on the fracture toughness and fracture energy in hydrogen-containing conditions; and determining the optimal powder feeding rate and optimal overlap rate using orthogonal experiments based on these optimal welding process parameters for coaxial powder feeding repair of the reactor. This application addresses the repair of hydrogenation reactors that have exceeded their service life and are exhibiting temper embrittlement, hydrogen embrittlement, or cracking. The use of coaxial powder feeding provides optimal welding process parameters, achieving minimal residual stress after welding and thus improving weld quality. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic flowchart of a coaxial powder feeding repair method for a hydrogenation reactor provided in an embodiment of this application;

[0039] Figure 2 This is a schematic diagram showing the relationship between hydrogen content and fracture toughness.

[0040] Figure 3 This is a schematic diagram showing the changes in various parameters of 2.25Cr1Mo steel with temperature.

[0041] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In one exemplary embodiment, such as Figure 1 As shown, a coaxial powder feeding repair method for a hydrogenation reactor is provided, comprising the following steps:

[0045] S1: Obtain the chemical composition and test temperature of the hydrogenation reactor to be repaired.

[0046] S2: Determine the fracture toughness of the hydrogenation reactor to be repaired based on its chemical composition and test temperature.

[0047] As an optional implementation, S2 specifically includes:

[0048] S21: Determine the J coefficient based on the chemical composition of the hydrogenation reactor to be repaired.

[0049] In practical applications, the degree of tempering embrittlement is predicted based on the chemical composition and service time of the hydrogenation reactor to be repaired, thereby determining the fracture toughness of the reactor material.

[0050] Among these methods, using the J coefficient to predict the ductile-brittle transition temperature (FATT) is currently the most mainstream approach. The J coefficient is calculated as follows:

[0051] J = (Mn + Si)(P + Sn) × 10 4 .

[0052] Where Mn represents the content of manganese; Si represents the content of silicon; P represents the content of phosphorus; and Sn represents the content of tin.

[0053] S22: Determine the ductile-brittle transition temperature value based on the J coefficient.

[0054] In practical applications, the formula for predicting the ductile-brittle transition temperature (FATT) from the J coefficient is as follows:

[0055] FATT max99％ =-8.0043(10 -4 )J 2 +0.7267J-15.416.

[0056] FATT max95％ =-8.5424(10 -4 )J 2 +0.7745J-48.782.

[0057] FATT max50％ =-5.5147(10 -4 )J 2 +0.5757J-7732.1.

[0058] Among them, FATT max99％ The ductile-brittle transition temperature predicted by the J coefficient at a 99% confidence level; FATT max95％ The ductile-brittle transition temperature predicted by the J coefficient at a 95% confidence level; FATT max50％ The value for the ductile-brittle transition temperature is predicted by the J coefficient at a 50% confidence level.

[0059] S23: Determine the fracture toughness of the hydrogenation reactor to be repaired based on the test temperature and the ductile-brittle transition temperature value.

[0060] In practical applications, the API 579-2016 evaluation specification provides the K value for predicting the material's brittle-ductile transition temperature after tempering embrittlement during long-term service. IC The calculation formula is as follows:

[0061] K IC =36.5+3.084exp[0.036(TT)] ref +56)).

[0062] Where T is the test temperature; T ref The ductile-brittle transition temperature (FATT) is the value of the ductile-brittle transition temperature.

[0063] S3: Perform dehydrogenation and preheating treatment on the hydrogenation reactor to be repaired.

[0064] In practical applications, the sample (the hydrogenation reactor to be repaired) undergoes dehydrogenation treatment at 200℃ for 30 minutes to 2 hours, achieving the desired preheating effect before welding. Preheating aims to reduce thermal stress and deformation during welding, prevent cold cracking, and promote a more uniform microstructure, reducing the formation of hardened structures and other undesirable phases. Laser cladding welding experiments can only be conducted after preheating; preheating serves as preparation for welding.

[0065] S4: Determine the fracture energy of the hydrogen-containing reactor to be repaired based on the fracture toughness of the hydrogenation reactor to be repaired.

[0066] In practical applications, the residual hydrogen concentration is calculated based on the curve of the relationship between hydrogen content and fracture toughness, according to different degrees of hydrogen embrittlement, and the fracture energy of the material when it contains hydrogen is also calculated.

[0067] As an optional implementation, S4 specifically includes:

[0068] S41: Based on the fracture toughness of the hydrogenation reactor to be repaired, the hydrogen concentration of the hydrogenation reactor to be repaired after dehydrogenation and preheating is determined using the relationship curve between hydrogen content and fracture toughness.

[0069] like Figure 2 As shown, based on the curve of hydrogen content versus fracture toughness (first, samples with different hydrogen contents were obtained through electrochemical hydrogen charging, and then fracture toughness tests were performed on the samples with different hydrogen contents), the results were obtained. Figure 2 The hydrogen content of the material was calculated from the curve (the curve). The XFEM method (Extended Finite Element Method) follows the damage initiation criterion of linear traction separation response. Once the traction force reaches the initial requirement, the analysis and calculation of crack propagation begins. After the elastoplastic change occurs, the crack tip begins to propagate according to the damage law.

[0070] S42: Determine the hydrogen adhesion rate of the dehydrogenated and preheated hydrogenation reactor to be repaired based on the hydrogen concentration.

[0071] S43: Determine the material fracture energy of the hydrogenation reactor to be repaired based on its fracture toughness.

[0072] Using the maximum principal stress damage initiation criterion in XFEM:

[0073]

[0074] f is the maximum principal stress. Damage begins to occur when f exceeds 1.

[0075] After defining the damage criterion, the damage evolution law should be defined. XFEM provides two damage evolution laws: one related to displacement and the other to energy. The energy-based evolution law generally distinguishes between the equivalent strain energy release rate Gequiv and the critical energy release rate GequivC. When Gequiv is greater than GequivC, crack propagation occurs. Because fracture energy is a material property describing a material's fracture resistance, an energy-based evolution law is chosen. The conditions for material fracture failure are defined by the BK criterion:

[0076]

[0077] With tensile strength σ b =σmax As the criterion for the initiation of the maximum principal stress; the study of type I cracks, so the material fracture energy G c =G IC =G IIC =G IIIC , is the material fracture energy for a type I crack; G IIC The fracture energy of a type II fracture material; G IIIC The fracture energy of a material with a type III fracture is given by fracture mechanics theory. The fracture energy of a material is:

[0078]

[0079] Among them, G c (0) represents the material fracture energy of the hydrogenation reactor to be repaired; K IC denoted as , where is the fracture toughness of the hydrogenation reactor to be repaired; E is the elastic modulus of the hydrogenation reactor to be repaired; and v is the Poisson's ratio of the hydrogenation reactor to be repaired.

[0080] S44: Determine the hydrogen-containing fracture energy of the hydrogenation reactor to be repaired based on the hydrogen adhesion rate and the material fracture energy.

[0081] Due to the influence of hydrogen on the material surface energy and fracture energy G c The relationship between the two is the same; the effect of hydrogen on the fracture energy of materials still conforms to the mathematical formula, from which the fracture energy related to hydrogen can be obtained:

[0082] G c (θ)=(1-1.0467θ+0.1687θ 2 )G c (0).

[0083] Among them, G c (θ) is the hydrogen-containing fracture energy of the hydrogenation reactor to be repaired; θ is the hydrogen adhesion rate, θ=c / (c+5.5), and c is the hydrogen concentration (ppm).

[0084] S5: Based on the fracture toughness and fracture energy of the hydrogenation reactor to be repaired, the optimal welding process parameters are determined using the extended finite element method; the optimal welding process parameters include laser power, welding speed, and spot diameter.

[0085] In practical applications, the extended finite element method is used to simulate the expansion of defects in a reactor with micro-defects that has exceeded its service life under welding heat input conditions, detect the magnitude of residual stress at the crack, and the hydrogen diffusion concentration field, thereby obtaining the optimal welding process parameters.

[0086] In the XFEM simulation, nodes and elements with the same temperature and stress fields were used. The created crack was imported into the cladding model, and tangential and normal interactions were added to the interactions. Then, the initial damage criterion and damage evolution law were set according to the fracture toughness K. IC With hydrogen-containing fracture energy G c The elastic-plastic parameters obtained by (θ) are input through the material property options.

[0087] The elastoplastic parameters include the temperature field parameters used in the model, including thermal conductivity λ (10 W / m·K) and specific heat capacity C (10 W / m·K). 3 J / Kg·K) and the mechanical property parameters required for stress field calculations, including the elastic modulus E(10) 11 Pa), Poisson's ratio υ(10) -1 ) and the coefficient of thermal expansion α(10 -5 W / K). These parameters are material properties and can be found in the literature.

[0088] In the temperature field simulation of the cladding process, the ambient temperature was set to room temperature, the boundary conditions were convective heat transfer and thermal radiation, the emissivity was taken as 0.85, and the convective heat transfer coefficient was taken as 10 W / (m²). 2 (℃). In the stress field simulation calculation, the constraints at the four bottom corners are only to prevent rigid displacement, which is equivalent to actual cladding under conditions without external restraint. In the hydrogen diffusion analysis, the boundary condition is the hydrogen activity φ. During the cladding process, the main source of hydrogen is the hydrogen trapped in the vessel wall after the pressure vessel has been shut down and cooled. Therefore, hydrogen introduction is achieved by setting the φ value at the interface between the cladding layer and the substrate in the model. The parameters of the 2.25Cr1Mo steel required for the simulation change with temperature as follows: Figure 3 As shown.

[0089] Numerical simulation analysis was conducted under nine operating conditions using a three-factor, three-level orthogonal experimental design. Mises stress, temperature gradient, and maximum hydrogen concentration were used as evaluation indicators for process optimization. Orthogonal analysis was performed on the design results for Mises equivalent stress, temperature gradient, and maximum hydrogen concentration to obtain the mean value plot of the variance analysis.

[0090] To determine the optimal combination of process parameters, the following formula is calculated:

[0091] S i =a i1 s i1 +a i2 s i2 +a i3 s i3 +…+a ij s ij .

[0092] In the formula: aij S represents the corresponding index coefficient. i This is the overall evaluation value (total score); s ij For the corresponding indicator values.

[0093] Three indicators of varying importance were selected. Based on the optimization direction, the residual stress value was set to 40 points, the temperature gradient value to 30 points, and the hydrogen concentration value to 30 points. Among them, a... ij = Score / Δi, where Δi is the difference between the maximum and minimum index values. Calculate using the above formula to obtain the comprehensive weighted score, and finally obtain the welding process parameters with the highest comprehensive score, i.e., the optimal welding process parameters (laser power, welding speed, spot diameter).

[0094] S6: Based on the optimal welding process parameters, the optimal powder feeding rate and optimal overlap rate are determined using orthogonal experiments to perform coaxial powder feeding repair on the hydrogenation reactor to be repaired.

[0095] Optimal laser power, welding speed, and spot diameter parameters were selected for welding tests. Based on the weld formation quality, the optimal powder feed rate and overlap rate were obtained. Specifically, after determining the laser power, welding speed, and spot diameter, the powder feed rate or overlap rate was added. An orthogonal experiment was conducted, combining three factors and three levels, to observe the morphology of the cladding cross-section and the smoothness of the cladding layer surface, thus obtaining the optimal powder feed rate and overlap rate. The cladding powder was proportioned according to the material elements. Gas protection was set up using a gas mixture (M21) of 82% Ar + 18% CO2, with a protective gas flow rate of 20 L / min. The weld joint position was adjusted according to the required weld morphology and cladding area, and the welding path was selected, using a swing-type welding method. After welding, the material underwent heat treatment to reduce residual stress. The initial heat treatment temperature was 400℃, the heating rate was 55℃ / h, the holding temperature was 680℃, the holding time was 2h, the cooling rate was 55℃ / h, and air cooling was performed after reaching 400℃.

[0096] The powder particle size range is 50μm-150μm, and the elemental composition is shown in Table 1.

[0097] Table 12.25Cr1Mo Steel Powder Proportioning Table

[0098]

[0099] Residual stress tests were performed on the repair area, heat-affected zone, and substrate to obtain transverse and longitudinal stresses. The weld seam was sampled and processed into sheet material for tensile testing to determine tensile strength, yield strength, and yield ratio. Impact tests were conducted on the sample material to obtain impact energy. Microstructural analysis was performed on the sample material to observe the uniformity and fineness of the grains.

[0100] As an optional implementation, the method further includes: conducting a quality assessment of the repaired hydrogenation reactor, specifically including:

[0101] Residual stress tests were performed on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the transverse and longitudinal stress distributions, conduct stress assessments, and check whether the residual stress distribution was uniform and within an acceptable range.

[0102] Tensile tests were performed on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the tensile strength, yield strength, yield ratio, and impact energy. Strength assessment was conducted, and the tensile strength and yield strength of different areas were compared with the tensile strength of the substrate to see if they could approach or exceed the tensile strength and yield strength of the substrate.

[0103] Toughness assessment was performed based on the impact energy of the repaired area and the impact energy of the substrate in the repaired hydrogenation reactor. Impact tests were conducted to compare the impact energy of the welded area with that of the substrate; the impact energy of the welded area should be close to or higher than that of the substrate.

[0104] Microstructural analysis was performed on the repaired area of ​​the hydrogenation reactor to evaluate its microstructure. The welded area should have a uniform and fine grain structure, which helps improve the strength and toughness of the material. The presence of unfavorable microstructures, such as coarse grains or brittle phase precipitation in the weld heat-affected zone, was examined.

[0105] This application addresses the repair of 2.25Cr1Mo steel hydrogenation reactors that have exceeded their service life and are suffering from temper embrittlement, hydrogen embrittlement, or cracks. The repair utilizes coaxial powder feeding, providing optimal process parameters to achieve minimal residual stress after welding. Mechanical property testing, microstructure observation, and crack propagation are employed to assess weld quality. Ultimately, this approach improves the effectiveness of coaxial powder feeding repair for 2.25Cr1Mo steel in its extended service life, thereby reducing replacement costs.

[0106] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 4As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a coaxial powder feeding repair method for a hydrogenation reactor.

[0107] Those skilled in the art will understand that Figure 4 The structures shown are merely block diagrams of some structures related to the present application and do not constitute a limitation on the computer equipment to which the present application is applied. Specific computer equipment may include more or fewer components than shown in the figures, or combine certain components, or have different component arrangements. In an exemplary embodiment, a computer equipment is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the coaxial powder feeding repair method for the hydrogenation reactor described above.

[0108] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the coaxial powder feeding repair method for the hydrogenation reactor described above.

[0109] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the coaxial powder feeding repair method for the hydrogenation reactor described above.

[0110] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0111] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0112] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0113] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for coaxial powder feeding and repair of a hydrogenation reactor, characterized in that, include: Obtain the chemical composition and test temperature of the hydrogenation reactor to be repaired; The fracture toughness of the hydrogenation reactor to be repaired is determined based on its chemical composition and test temperature. Based on the chemical composition and test temperature of the hydrogenation reactor to be repaired, the fracture toughness of the hydrogenation reactor to be repaired is determined, specifically including: Determine the J coefficient based on the chemical composition of the hydrogenation reactor to be repaired; The ductile-brittle transition temperature value is determined based on the J coefficient. The fracture toughness of the hydrogenation reactor to be repaired is determined based on the test temperature and the ductile-brittle transition temperature value. The hydrogenation reactor to be repaired was subjected to dehydrogenation and preheating treatment; Based on the fracture toughness of the hydrogenation reactor to be repaired, determine the fracture energy of the hydrogenation reactor at hydrogen content. Based on the fracture toughness of the hydrogenation reactor to be repaired, the fracture energy of the hydrogenation reactor in hydrogen-containing conditions is determined, specifically including: Based on the fracture toughness of the hydrogenation reactor to be repaired, the hydrogen concentration of the hydrogenation reactor to be repaired after dehydrogenation and preheating is determined using the relationship curve between hydrogen content and fracture toughness. The hydrogen adhesion rate of the dehydrogenated and preheated hydrogenation reactor to be repaired is determined based on the hydrogen concentration. The material fracture energy of the hydrogenation reactor to be repaired is determined based on the fracture toughness of the reactor. The hydrogen adhesion rate and the material fracture energy are used to determine the hydrogen fracture energy of the hydrogenation reactor to be repaired when it contains hydrogen. Based on the fracture toughness and fracture energy of the hydrogenation reactor to be repaired, the optimal welding process parameters are determined using the extended finite element method. The optimal welding process parameters include laser power, welding speed, and spot diameter. Based on the optimal welding process parameters, the optimal powder feeding rate and optimal overlap rate are determined using orthogonal experiments to perform coaxial powder feeding repair on the hydrogenation reactor to be repaired.

2. The coaxial powder feeding repair method for a hydrogenation reactor according to claim 1, characterized in that, The preheating temperature is 200℃, and the holding time is 30min-2h.

3. The coaxial powder feeding repair method for a hydrogenation reactor according to claim 1, characterized in that, Based on the fracture toughness of the hydrogenation reactor to be repaired, the material fracture energy of the hydrogenation reactor to be repaired is determined, specifically including: Using formula Determine the material fracture energy of the hydrogenation reactor to be repaired; wherein, K represents the material fracture energy of the hydrogenation reactor to be repaired. IC denoted as , where is the fracture toughness of the hydrogenation reactor to be repaired; E is the elastic modulus of the hydrogenation reactor to be repaired; and v is the Poisson's ratio of the hydrogenation reactor to be repaired.

4. The coaxial powder feeding repair method for a hydrogenation reactor according to claim 1, characterized in that, Based on the hydrogen adhesion rate and the material fracture energy, the fracture energy of the hydrogenation reactor to be repaired in the presence of hydrogen is determined, specifically including: Using formula Determine the hydrogen-containing fracture energy of the hydrogenation reactor to be repaired; wherein, The fracture energy of the hydrogen-containing hydrogenation reactor to be repaired; θ represents the material fracture energy of the hydrogenation reactor to be repaired; θ is the hydrogen adhesion rate, θ=c / (c+5.5), where c is the hydrogen concentration.

5. The coaxial powder feeding repair method for a hydrogenation reactor according to claim 1, characterized in that, Also includes: A quality assessment was conducted on the repaired hydrogenation reactor, specifically including: Residual stress tests were performed on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the transverse and longitudinal stress distributions and to conduct stress assessments. Tensile tests were conducted on the repaired area, heat-affected zone, and substrate of the repaired hydrogenation reactor to determine the tensile strength, yield strength, yield ratio, and impact energy, and to conduct a strength assessment. Toughness assessment was conducted based on the impact energy of the repaired area and the impact energy of the substrate in the repaired hydrogenation reactor. Microstructural analysis was performed on the repaired area of ​​the hydrogenation reactor to evaluate its structure.

6. A computer device, comprising: The memory and processor contain a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the coaxial powder feeding repair method for the hydrogenation reactor according to any one of claims 1-5.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the coaxial powder feeding repair method for the hydrogenation reactor as described in any one of claims 1-5.

8. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the coaxial powder feeding repair method for the hydrogenation reactor as described in any one of claims 1-5.

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