Alloy corrosion-resistant treatment method and device

Abstract

The invention provides an alloy corrosion-resistant treatment method and device. The method comprises the following steps: performing electric pulse treatment on an alloy material by adopting a first electric pulse, and after the electric pulse treatment is maintained for a first time period, ending the electric pulse treatment; after the alloy material is cooled to the room temperature, a second electric pulse is adopted for conducting electric pulse treatment on the alloy material; after the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to be a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for a third time period, the electric pulse treatment is ended until the alloy material is naturally cooled to the room temperature; wherein the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is smaller than that corresponding to the third electric pulse; the first time period is smaller than the second time period and the third time period; the second time period is greater than or equal to the third time period. The device is suitable for treatment of large structural parts, and the structural part treatment efficiency can be greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of alloy corrosion resistance treatment, and in particular to an alloy corrosion resistance treatment method and device. Background Art

[0002] Alloy is a substance with metallic properties synthesized by two or more metals and metals or non-metals through a certain method. It is generally obtained by melting into a uniform liquid and solidifying. Compared with a single metal element, alloys have many significant advantages, which make alloys widely used in industry, science and technology, and daily life. Taking aluminum alloy as an example, aluminum alloy has excellent properties such as low density, high specific strength, good machinability, and recyclability. It is a key structural material for lightweight equipment such as aerospace and high-speed train bodies. It has broad application prospects in aerospace, military, and automobile manufacturing. Its service life is restricted by the corrosion resistance of the alloy, which can be solved by adjusting the distribution of the precipitated phase.

[0003] At present, when improving the corrosion resistance of alloys, general processing technologies have problems such as long processing time and high energy loss, and are not suitable for the processing of large structural parts. Summary of the invention

[0004] The embodiments of the present application provide an alloy corrosion resistance treatment method and device to solve the problem that the alloy corrosion resistance treatment technology has a long treatment time and a large energy loss, and is not suitable for the treatment of large structural parts.

[0005] In a first aspect, an embodiment of the present application provides a method for treating alloy corrosion resistance, comprising:

[0006] Performing an electric pulse treatment on the alloy material using a first electric pulse, and ending the electric pulse treatment after the electric pulse treatment is maintained for a first period of time;

[0007] After the alloy material is cooled to room temperature, performing an electric pulse treatment on the alloy material using a second electric pulse;

[0008] After the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated, and the alloy material is allowed to cool naturally to room temperature;

[0009] Among them, the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is smaller than the frequency corresponding to the third electric pulse; the first time period is smaller than the second time period and the third time period; the second time period is greater than or equal to the third time period.

[0010] In a second aspect, an embodiment of the present application provides an alloy corrosion-resistant treatment device, comprising:

[0011] A timing module, used for timing the electrical pulse processing time;

[0012] An electric pulse processing module, used to perform electric pulse processing on the alloy material using a first electric pulse, and terminate the electric pulse processing after the electric pulse processing is maintained for a first period of time;

[0013] After the alloy material is cooled to room temperature, performing an electric pulse treatment on the alloy material using a second electric pulse;

[0014] After the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated;

[0015] Among them, the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is smaller than the frequency corresponding to the third electric pulse; the first time period is smaller than the second time period and the third time period; the second time period is greater than or equal to the third time period.

[0016] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the first aspect or any possible implementation of the first aspect are implemented.

[0017] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the method described in the first aspect or any possible implementation method of the first aspect.

[0018] The embodiment of the present application provides a method and device for corrosion resistance treatment of alloys, which sequentially uses a first electric pulse, a second electric pulse and the third electric pulse with different frequencies to perform electric pulse treatment on the alloy material, and promotes the diffusion of atoms and vacancies inside the alloy material by increasing the frequency in a step-by-step manner, accelerates the dissolution and precipitation process of the second phase, and thus improves the corrosion performance of the alloy material in a short time. In addition, reasonable time allocation is performed for the electric pulse treatment at each stage to ensure that the corrosion performance of the alloy material is optimized to the greatest extent in a short time. Combining the characteristics of electric pulse treatment and step-by-step increase in frequency, the corrosion resistance of the alloy material can be improved mainly by controlling the electrical signal, making this method suitable for the treatment of large structural parts and can greatly improve the efficiency of structural part treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a flow chart of the implementation of the alloy corrosion resistance treatment method provided in the embodiment of the present application;

[0021] Figure 2 Schematic diagram of the time distribution of the treatment stages of the alloy corrosion resistance treatment method in this embodiment;

[0022] Figure 3 The impedance spectra of the samples of aluminum alloy materials treated and untreated by the alloy corrosion resistance treatment method of the present application;

[0023] Figure 4 Polarization curves of samples of aluminum alloy materials treated and untreated by the alloy corrosion resistance treatment method of the present application;

[0024] Figure 5 The transmission photographs of the samples of aluminum alloy materials treated and untreated by the alloy corrosion resistance treatment method of the present application;

[0025] Figure 6 It is a schematic structural diagram of an alloy corrosion-resistant treatment device provided in an embodiment of the present application;

[0026] Figure 7 It is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0027] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0028] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0029] Unless otherwise specified, the term "plurality" means two or more. The character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B. The term "and / or" is a description of the association relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or, A and B.

[0030] The words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or including (comprising) refer to the existence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or these groups. In the absence of more restrictions, the elements defined by the statement "including one..." do not exclude the existence of other identical elements in the process, method or device including the elements.

[0031] In this application, each embodiment may focus on the differences from other embodiments, and the same or similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts may refer to the description of the method part.

[0032] In recent years, pulse current treatment technology has been continuously applied in the field of metal material processing, and has incomparable advantages in improving microstructure and various properties. The alloy corrosion resistance treatment method provided in the embodiment of the present application is suitable for the processing of different alloy materials. In order to verify the effect of the alloy corrosion resistance treatment method, aluminum alloy is mainly used for verification and key explanation.

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0034] Figure 1 is a flow chart of the alloy corrosion resistance treatment method provided in the embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0035] S101, performing electric pulse treatment on the alloy material using a first electric pulse, and ending the electric pulse treatment after the electric pulse treatment is maintained for a first period of time.

[0036] S102, after the alloy material is cooled to room temperature, an electric pulse treatment is performed on the alloy material using a second electric pulse.

[0037] S103, after the electric pulse treatment is maintained for the second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated, and the alloy material is allowed to cool naturally to room temperature.

[0038] Among them, the frequency corresponding to the first electric pulse is less than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is less than the frequency corresponding to the third electric pulse; the first time period is less than the second time period and the third time period; the second time period is greater than or equal to the third time period.

[0039] The execution subject of each embodiment in this application is a pulse transmitter or a server, processor, microprocessor or other device with data processing function that is connected to the pulse transmitter. In the actual implementation process, the specific implementation method of the execution subject can be selected according to actual needs, and this embodiment does not impose any special restrictions on this. In the actual production process, the alloy material is clamped in the power fixture and subjected to electric pulse treatment. The execution subject of the embodiment of this application is used to connect with the power fixture to control the pulse output.

[0040] The alloy corrosion resistance treatment method provided in the present application is a three-stage electric pulse treatment scheme, in which different electric pulse treatment stages have different effects in the alloy corrosion resistance treatment process. Among them, the first electric pulse is mainly used to dissolve the second phase, the second electric pulse provides the necessary nucleation points for the formation of the precipitated phase, and the third electric pulse is dedicated to the precipitation of the second phase. In view of the different purposes of each pulse treatment stage, it is necessary to adapt and adjust the frequency and duration of each electric pulse to achieve the best treatment effect.

[0041] Specifically, the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse, and the frequency corresponding to the second electric pulse is smaller than the frequency corresponding to the third electric pulse, showing a trend of step-by-step frequency increase. This gradual increase in frequency helps promote the diffusion of atoms and vacancies inside the alloy material, thereby accelerating the dissolution and precipitation process of the second phase, and further improving the corrosion performance of the alloy material in a short time.

[0042] In addition, in terms of time allocation, the first time period is set relatively short to ensure that the task of dissolving the second phase is completed in a short time to avoid affecting the time required for the entire process of alloy corrosion resistance treatment. Since phase change requires time, the second and third time periods are adaptively adjusted according to the formation of nucleation points and the actual state of the second phase to ensure that the corrosion performance of the alloy material is optimized to the greatest extent.

[0043] In this embodiment, the alloy material is subjected to electric pulse treatment in sequence using a first electric pulse, a second electric pulse, and a third electric pulse of different frequencies. By increasing the frequency in a step-by-step manner, the diffusion of atoms and vacancies inside the alloy material is promoted, and the dissolution and precipitation process of the second phase is accelerated, thereby improving the corrosion performance of the alloy material in a short time. In addition, a reasonable time allocation is made for each stage of electric pulse treatment to ensure that the corrosion performance of the alloy material is optimized to the greatest extent in a short time. Combining the characteristics of electric pulse treatment and step-by-step increase in frequency, the corrosion resistance of the alloy material can be improved mainly by controlling the electrical signal, making this method suitable for the treatment of large structural parts and greatly improving the efficiency of structural part treatment.

[0044] The above is an explanation of the main improvements in the alloy corrosion resistance treatment method. During the specific implementation process, it can also be optimized and controlled from multiple angles based on the above scheme to improve the treatment efficiency and optimize the corrosion resistance of the alloy material.

[0045] In a possible implementation, the current density corresponding to the first electric pulse is greater than the current density corresponding to the second electric pulse and the third electric pulse.

[0046] Among them, based on the above-mentioned embodiment, the first electric pulse is mainly used to dissolve the second phase, the second electric pulse provides the necessary nucleation points for the formation of the precipitated phase, and the third electric pulse is dedicated to achieving the precipitation of the second phase. In the process of alloy corrosion resistance treatment, dissolving the second phase requires higher energy than generating nucleation points and second phase precipitation. Therefore, the current density corresponding to the first electric pulse is greater than the current density corresponding to the second electric pulse and the third electric pulse.

[0047] In this embodiment, the energy consumption of the alloy corrosion-resistant treatment process is optimized by optimizing the current density, thereby improving the preparation efficiency while reducing energy consumption and saving the cost of the entire preparation process.

[0048] In a possible implementation, the method further includes:

[0049] Obtaining basic parameters of the alloy material; wherein the basic parameters include: one or more of length, width, height and volume;

[0050] The frequency, duty cycle, current density or duration corresponding to the first electric pulse, the second electric pulse and the third electric pulse are determined according to the basic parameters.

[0051] Among them, adjusting the frequency, duty cycle, current density and duration of the electric pulse can change the number, distribution and size of the precipitated phases in the crystal and at the grain boundary, thereby effectively improving the corrosion resistance of the aluminum alloy. Specifically, adjusting the frequency of the electric pulse can control the grain growth rate of the alloy material; adjusting the duty cycle can adjust the effective voltage and affect the degree of two-phase dissolution of the alloy material; adjusting the current density or duration can change the output energy per unit time, so that the precipitated phase in the crystal is transformed from a densely distributed metastable η' phase to a dispersed η phase, and part of the η phase is spheroidized, affecting the microstructure of the alloy material. Therefore, adaptive adjustment of the electric pulse parameters based on the basic parameters of the alloy material can optimize the processing and treatment process of the alloy material.

[0052] In different embodiments, when obtaining the basic parameters of the alloy material, the types of basic parameters obtained are different. Optionally, in the batch preparation process of alloy structural parts, when any one or two of the length, width and height are fixed, the specific value of the non-fixed item or the volume of the alloy material can be obtained to adjust the frequency, duty cycle, current density or duration of each electric pulse according to the specific value of the basic parameter obtained.

[0053] Based on the above embodiment, in a possible implementation manner, the larger the volume of the alloy material, the longer the duration of the corresponding electric pulse treatment, and the greater the corresponding current density;

[0054] When the width and height of the alloy material are fixed, the larger the length value is, the larger the frequency and duty cycle of the corresponding electric pulse is.

[0055] Among them, the larger the volume of the alloy material, the greater the energy required for the overall phase transformation of the alloy material. Therefore, the duration of the electric pulse is extended and the current density is increased to provide more energy. Since the uneven distribution of the coarse η phase on the grain boundary is not easy to form a corrosion channel, sufficient energy ensures that the precipitated phase in the crystal is transformed from the densely distributed metastable η' phase to the dispersed η phase, thereby effectively improving the corrosion resistance of the aluminum alloy.

[0056] When the width and height of the alloy material are fixed, the larger the length value, the larger the frequency and duty cycle of the corresponding electric pulse, ensuring that the electric pulse energy can reach the middle of the alloy material directly, thereby optimizing the overall corrosion resistance of the alloy material.

[0057] In this embodiment, the electric pulse parameters are finely adjusted according to the basic parameters of the alloy material, and the frequency, duty cycle, current density or duration of the electric pulse are adjusted to ensure that the electric pulse can act on the alloy material more effectively and optimize the material performance.

[0058] The above-mentioned embodiment provides an optimization control solution from the perspective of adjusting the electric pulse parameters. In the actual implementation process, the corrosion resistance of the alloy material can also be optimized by selecting a cooling treatment method for the alloy material.

[0059] In a possible implementation, before the alloy material is subjected to electric pulse treatment using the second electric pulse, the method further includes:

[0060] The alloy material is cooled by water cooling.

[0061] In this embodiment, water cooling is used to rapidly cool down the alloy material using the high thermal conductivity and cooling effect of water, thereby increasing the cooling rate and helping the alloy material to better maintain its performance. The water cooling method is particularly suitable for cooling large structural parts, greatly improving the production efficiency.

[0062] In addition to water cooling, in other possible implementations, oil cooling or air cooling is used to cool the alloy material.

[0063] Optionally, when the hardness requirement of the alloy material is low, oil cooling is used instead of water cooling; when the thickness of the alloy material is thin, air cooling is used instead of water cooling to avoid deformation.

[0064] In addition to adjusting the electric pulse parameters and cooling method, the electric pulse can be further fine-tuned during the electric pulse treatment process to optimize the preparation efficiency of the alloy material.

[0065] In a possible implementation, the method further includes:

[0066] During the electric pulse treatment process, the real-time temperature of the alloy material is obtained;

[0067] When the real-time temperature exceeds the set range, the frequency and / or current density of the corresponding electric pulses are adjusted.

[0068] When the real-time temperature is lower than the minimum temperature value of the set range, the frequency and / or current density of the electric pulses are increased; when the real-time temperature is higher than the maximum temperature value of the set range, the frequency and / or current density of the electric pulses are reduced.

[0069] In the embodiments of the present application, the real-time temperature of the alloy material is obtained and the frequency and / or current density of the corresponding electric pulse is adjusted, so as to control the temperature of the alloy material within a certain range and control the microstructure and properties of the material.

[0070] In the actual implementation process, the metal materials in the alloy materials are different, and the application scenarios and performance requirements after the alloy materials are prepared are different. Therefore, in the process of alloy corrosion resistance treatment, the requirements for electric pulse parameters are different. In the process of aluminum alloy material preparation, the electric pulse parameters are set as follows:

[0071] In a possible implementation, the current density corresponding to the first electric pulse is 150A / mm2 to 200A / mm; the current density corresponding to the second electric pulse is 10A / mm 2 ~20A / mm 2 ; The current density corresponding to the third electric pulse is 20A / mm 2 ~30A / mm 2 .

[0072] In a possible implementation, the frequency corresponding to the first electric pulse is 50 Hz to 500 Hz; the frequency corresponding to the second electric pulse is 1 kHz to 5 kHz; and the frequency corresponding to the third electric pulse is 6 kHz to 10 kHz.

[0073] In a possible implementation, the first time period is 2 seconds to 10 seconds; the second time period is 5 minutes to 10 minutes; and the third time period is 10 minutes to 15 minutes.

[0074] In the specific implementation process, the frequency, current density and duration of the electric pulse can be adjusted within the above range according to the real-time temperature of the alloy material.

[0075] In a specific embodiment, in order to verify the effect of the alloy corrosion resistance treatment method provided in the embodiment of the present application, the aluminum alloy material and the following steps are used for verification:

[0076] Step 1, first stage of treatment. First, use 400# SiC sandpaper for rough grinding to remove the wire cutting marks on the surface of the aluminum alloy material sample, so that the sample is in full contact with the copper electrode. Fix the sample on the copper electrode, then adjust the electric pulse parameters for the first stage of treatment, and immediately perform water cooling within 3 to 5 seconds after the treatment is completed. Specifically, adjust the electric pulse parameters to apply a pulse frequency of 500Hz, a duty cycle of 37.5%, and a current density of 175A / mm 2 The electric pulse treatment is 2 to 10 seconds.

[0077] Step 2, second stage treatment. After cooling to room temperature, place the sample back to the power supply within ten minutes and adjust the electric pulse parameters for the second stage of electric pulse treatment. Connect a thermocouple in the middle of the sample to monitor the aging temperature in real time. Specifically, adjust the electric pulse parameters to apply a pulse frequency of 5kHz and a current density of 15A / mm 2 The electric pulse treatment was performed for 5 to 10 minutes.

[0078] Step 3, third stage treatment. Immediately after the second stage treatment, adjust the electric pulse parameters to continue the third stage treatment. After the third stage treatment, cool naturally to room temperature and cut a block sample of 10×10×2mm in the middle of the sample for standby use. Specifically, adjust the electric pulse parameters to apply an electric pulse treatment of 10kHz pulse frequency and 25A / mm2 current density to the sample for 10 to 15 minutes.

[0079] Step 4: Electrochemical test. First, prepare a sodium chloride solution with a mass fraction of 3.5%, select a three-electrode system, use aluminum alloy as the working electrode, platinum sheet as the auxiliary electrode, saturated calomel electrode as the reference electrode, scan rate 2mV / s, scan voltage range -2~1V, and perform electrochemical test.

[0080] Figure 2 Schematic diagram of the time distribution of the treatment phases of the alloy corrosion resistance treatment method in this embodiment. Step 1, step 2 and step 3 correspond to Figure 2 The first stage processing, the second stage processing and the third stage processing.

[0081] Among them, the working electrodes in step 4 are respectively made based on the untreated original aluminum alloy material and the aluminum alloy material treated by steps 1, 2 and 3, and electrochemical tests are performed on the working electrodes made of two different materials to compare and analyze the test results.

[0082] Figure 3 The impedance spectra of the aluminum alloy samples treated and untreated by the alloy corrosion resistance treatment method of the present application are shown. Figure 3 In the figure, the horizontal axis is the real part of the impedance, the vertical axis is the imaginary part of the impedance, and the curve with dots (i.e., the curve corresponding to the electric pulse frequency hopping step treatment) shows the impedance curve of the sample after being treated by the alloy corrosion resistance treatment method of the present application. Figure 3 It can be seen that the samples treated by the alloy corrosion resistance treatment method of the present application are more corrosion resistant than the samples of untreated aluminum alloy materials.

[0083] Figure 4 The polarization curves of the aluminum alloy samples treated and untreated by the alloy corrosion resistance treatment method of the present application are shown. Figure 4 In the figure, the horizontal axis is the self-corrosion current density, the vertical axis is the self-corrosion potential, and the curve with dots (i.e. the curve corresponding to the electric pulse frequency hopping step treatment) shows the anti-polarization curve of the sample after being treated by the alloy corrosion resistance treatment method of the present application. Figure 4 As shown, after fitting the curve, the sample treated by the alloy corrosion resistance treatment method of the present application is more corrosion resistant.

[0084] Figure 5These are transmission photographs of samples of aluminum alloy materials treated and untreated based on the alloy corrosion resistance treatment method of the present application. Figure 5 The left side is a TEM image of an untreated aluminum alloy material sample, and the right side is a TEM image of an aluminum alloy material sample treated according to the alloy corrosion resistance treatment method of the present application. Figure 5 It can be seen that after the alloy corrosion resistance treatment method of the present application is used, a coarse η phase can be obtained within the crystal and the distribution is uneven, and it is not easy to form a corrosion channel, thereby effectively improving the corrosion resistance of the aluminum alloy.

[0085] The above verification results prove that the three-stage electric pulse frequency modulation step treatment in the present invention can provide a large amount of energy in a very short time and promote the phase change of aluminum alloy at a relatively low temperature.

[0086] Patent CN111004912B discloses an electric pulse treatment method for relaxation of amorphous alloy structure, which can regulate the degree of relaxation of amorphous alloy structure in a short time. However, this method cannot adjust the frequency. For aluminum alloys, it cannot provide enough energy to promote the re-precipitation of the second phase, so it is not suitable for the treatment of high-strength and lightweight aluminum alloys. Patent CN115305317B discloses an electric pulse treatment method for improving the strength and plasticity of cold-drawn high-carbon steel wire. This method improves the strength and plasticity at the same time by pre-treating the material, continuously cold drawing and electric pulse treatment. However, this method is cumbersome, and the electric pulse frequency is only 200-500Hz, which is too low to provide enough energy to improve the microstructure of aluminum alloys. Therefore, it is not suitable for improving the corrosion resistance of aluminum alloys. Patent CN201910142566.0 discloses an electromagnetic pulse rapid solid solution-aging process for aluminum alloy components. This process combines solid solution and aging treatment to improve the comprehensive properties of aluminum alloys within 1 to 12 hours. However, the electric pulse frequency of this method is only 20Hz to 80Hz, and the processing time is long, exceeding 1h, so it is impossible to achieve rapid processing of aluminum alloy. Patent CN115679417A discloses a method of introducing a pulse current of segmented frequency during micro-arc oxidation to improve corrosion resistance. This method requires processing during micro-arc oxidation, which is inconsistent with the post-weld treatment proposed in the present invention. In addition, the pulse frequency of the present invention is higher, the required voltage is lower, and it is safer. At the same time, parameters such as current density are used for adjustment.

[0087] Based on the above comparative analysis, the electric pulse frequency modulation step treatment method of the present application can ensure that the corrosion resistance of the aluminum alloy is improved in a very short time and the service life of the aluminum alloy is extended.

[0088] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0089] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0090] Figure 6 is a schematic diagram of the structure of the alloy corrosion-resistant treatment device provided in the embodiment of the present application, such as Figure 6 For the sake of convenience, only the parts related to the embodiment of the present application are shown. Figure 6 As shown, the device comprises:

[0091] A timing module 601 is used to time the electrical pulse processing time;

[0092] The electric pulse processing module 602 is used to perform electric pulse processing on the alloy material using a first electric pulse, and terminate the electric pulse processing after the electric pulse processing is maintained for a first time period;

[0093] After the alloy material is cooled to room temperature, the alloy material is subjected to electric pulse treatment using a second electric pulse;

[0094] After the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated;

[0095] Among them, the frequency corresponding to the first electric pulse is less than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is less than the frequency corresponding to the third electric pulse; the first time period is less than the second time period and the third time period; the second time period is greater than or equal to the third time period.

[0096] In one possible implementation, the electric pulse processing module 602 is also used to obtain basic parameters of the alloy material; wherein the basic parameters include: one or more of length, width, height and volume; and determine the frequency, duty cycle, current density or duration corresponding to the first electric pulse, the second electric pulse and the third electric pulse according to the basic parameters.

[0097] In a possible implementation, the device further includes a cooling module for cooling the alloy material by water cooling before the alloy material is subjected to the electric pulse treatment by the second electric pulse.

[0098] In a possible implementation, the electric pulse processing module 602 is also used to obtain the real-time temperature of the alloy material during the electric pulse processing; when the real-time temperature exceeds a set range, adjust the frequency and / or current density of the corresponding electric pulse.

[0099] In this embodiment, the alloy material is subjected to electric pulse treatment in sequence using a first electric pulse, a second electric pulse, and a third electric pulse of different frequencies. By increasing the frequency in a step-by-step manner, the diffusion of atoms and vacancies inside the alloy material is promoted, and the dissolution and precipitation process of the second phase is accelerated, thereby improving the corrosion performance of the alloy material in a short time. In addition, a reasonable time allocation is made for each stage of electric pulse treatment to ensure that the corrosion performance of the alloy material is optimized to the greatest extent in a short time. Combining the characteristics of electric pulse treatment and step-by-step increase in frequency, the corrosion resistance of the alloy material can be improved mainly by controlling the electrical signal, making this method suitable for the treatment of large structural parts and greatly improving the efficiency of structural part treatment.

[0100] Figure 7 Schematic diagram of the structure of an electronic device provided by an embodiment of the present application. Figure 7 As shown, the electronic device 7 of this embodiment includes: a processor 70, a memory 71, and a computer program 72 stored in the memory 71 and executable on the processor 70. When the processor 70 executes the computer program 72, the steps in the above-mentioned alloy corrosion resistance treatment method embodiments are implemented, for example Figure 1 Alternatively, when the processor 70 executes the computer program 72, the functions of the modules / units in the above-mentioned device embodiments are realized, for example Figure 5 The functions of each module are shown.

[0101] Exemplarily, the computer program 72 may be divided into one or more modules / units, which are stored in the memory 71 and executed by the processor 70 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 72 in the electronic device 7. For example, the computer program 72 may be divided into Figure 5 The modules shown.

[0102] The electronic device 7 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The electronic device 7 may include, but is not limited to, a processor 70 and a memory 71. Those skilled in the art will appreciate that Figure 7 It is only an example of the electronic device 7 and does not constitute a limitation of the electronic device 7. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0103] The processor 70 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0104] The memory 71 may be an internal storage unit of the electronic device 7, such as a hard disk or memory of the electronic device 7. The memory 71 may also be an external storage device of the electronic device 7, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the electronic device 7. The memory 71 is used to store the computer program and other programs and data required by the electronic device. The memory 71 may also be used to temporarily store data that has been output or is to be output.

[0105] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0106] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0107] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0108] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0109] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0111] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various alloy corrosion-resistant treatment method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0112] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for treating alloy corrosion resistance, characterized in that: include: Performing an electric pulse treatment on the alloy material using a first electric pulse, and ending the electric pulse treatment after the electric pulse treatment is maintained for a first period of time; After the alloy material is cooled to room temperature, performing an electric pulse treatment on the alloy material using a second electric pulse; After the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated, and the alloy material is allowed to cool naturally to room temperature; Among them, the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is smaller than the frequency corresponding to the third electric pulse; the first time period is smaller than the second time period and the third time period; the second time period is greater than or equal to the third time period.

2. The method according to claim 1, characterized in that The current density corresponding to the first electric pulse is greater than the current density corresponding to the second electric pulse and the third electric pulse.

3. The method according to claim 2, characterized in that The current density corresponding to the first electric pulse is 150A / mm2 to 200A / mm; the current density corresponding to the second electric pulse is 10A / mm 2 ~20A / mm 2 The current density corresponding to the third electric pulse is 20A / mm 2 ~30A / mm 2 .

4. The method according to claim 1, characterized in that Also includes: Obtaining basic parameters of the alloy material; wherein the basic parameters include: one or more of length, width, height and volume; The frequency, duty cycle, current density or duration corresponding to the first electric pulse, the second electric pulse and the third electric pulse are determined according to the basic parameters.

5. The method according to claim 4, characterized in that The larger the volume of the alloy material, the longer the duration of the corresponding electric pulse treatment and the greater the corresponding current density; When the width and height of the alloy material are fixed, the larger the length value is, the larger the frequency and duty cycle of the corresponding electric pulse are.

6. The method according to claim 1, characterized in that Before the alloy material is subjected to electric pulse treatment using a second electric pulse, the method further comprises: The alloy material is cooled by water cooling.

7. The method according to claim 1, characterized in that Also includes: During the electric pulse treatment, obtaining the real-time temperature of the alloy material; When the real-time temperature exceeds the set range, the frequency and / or current density of the corresponding electric pulses are adjusted.

8. The method according to claim 1, characterized in that The frequency corresponding to the first electric pulse is 50 Hz to 500 Hz; the frequency corresponding to the second electric pulse is 1 kHz to 5 kHz; and the frequency corresponding to the third electric pulse is 6 kHz to 10 kHz.

9. The method according to claim 1, characterized in that: The first time period is 2s to 10s; the second time period is 5min to 10min; and the third time period is 10min to 15min.

10. An alloy corrosion resistance treatment device, characterized in that: include: A timing module, used for timing the electrical pulse processing time; An electric pulse processing module, used to perform electric pulse processing on the alloy material using a first electric pulse, and terminate the electric pulse processing after the electric pulse processing is maintained for a first period of time; After the alloy material is cooled to room temperature, performing an electric pulse treatment on the alloy material using a second electric pulse; After the electric pulse treatment is maintained for a second time period, the second electric pulse is adjusted to a third electric pulse for electric pulse treatment, and after the electric pulse treatment is maintained for the third time period, the electric pulse treatment is terminated; Among them, the frequency corresponding to the first electric pulse is smaller than the frequency corresponding to the second electric pulse; the frequency corresponding to the second electric pulse is smaller than the frequency corresponding to the third electric pulse; the first time period is smaller than the second time period and the third time period; the second time period is greater than or equal to the third time period.

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