Method and apparatus for determining the life of an electrically resistive alloy

Abstract

This invention provides a method and apparatus for determining the lifespan of an electrothermal alloy, relating to the field of electrothermal alloy technology. The method includes: obtaining the power attenuation ratio and basic specifications of the electrothermal alloy; determining the target resistance of the electrothermal alloy at a target furnace temperature based on the resistance-temperature characteristics and basic specifications of the electrothermal alloy; determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load and basic specifications of the electrothermal alloy at the target furnace temperature; obtaining the power-time relationship of the electrothermal alloy based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature; determining the lifespan termination power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power; and determining the attenuation time required for the power of the electrothermal alloy to attenuate to the lifespan termination power value at the target furnace temperature based on the power-time relationship, and using the attenuation time as the lifespan of the electrothermal alloy.

Description

Technical Field

[0001] This invention relates to the field of electrothermal alloy technology, and in particular to a method and apparatus for determining the lifespan of an electrothermal alloy. Background Technology

[0002] Existing methods for testing the lifespan of electrothermal alloys typically employ rapid life testing. This involves directly raising the surface temperature of the heating wire to its maximum allowable heating temperature (e.g., 1300℃ for Cr25Al5 alloy) at room temperature and accelerating the material failure process through rapid power switching. The test duration is usually no more than 200 hours. Under these accelerated test conditions, the surface load of the electrothermal alloy can reach 30-50 W / cm², far exceeding the allowable surface load values ​​in actual industrial electric heating furnace designs. In practical applications, the working environment of the electrothermal alloy is the internal temperature field of the furnace body, and its surface load value is much lower than that of the accelerated test. Furthermore, the heat dissipation boundary conditions (such as radiative heat transfer, furnace atmosphere, and insulation structure) are fundamentally different from the open rapid life test environment. Therefore, the aging data obtained from rapid life testing cannot be directly mapped or converted into the actual service life of the electrothermal alloy under specific furnace temperatures and designed surface loads. The test results are insufficient to effectively guide the selection and design of the furnace body's electrothermal alloy and cannot provide a reliable basis for predicting the lifespan of the furnace body for regular maintenance. Summary of the Invention

[0003] This invention provides a method and apparatus for determining the lifespan of an electrothermal alloy, which solves the technical problem in related technologies where the lifespan test environment, which involves directly heating the surface of the electrothermal alloy to the highest temperature and then quickly cutting off the power, does not match the actual working environment, resulting in inaccurate lifespan measurements.

[0004] In a first aspect, embodiments of the present invention provide a method for determining the lifespan of an electrothermal alloy, the method comprising: Obtain the power attenuation ratio and basic specifications of the electrothermal alloy; Based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications, determine the target resistance of the electrothermal alloy at the target furnace temperature. The initial rated power of the electrothermal alloy at the target furnace temperature is determined based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications. Based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature, the power-time relationship of the electrothermal alloy is obtained; The lifespan power value of the electrothermal alloy at the target furnace temperature is determined based on the power attenuation ratio and the initial rated power. The attenuation time required for the power of the electrothermal alloy to decay to the lifespan power value at the target furnace temperature is determined based on the power-time relationship. The attenuation time is taken as the lifespan of the electrothermal alloy.

[0005] Preferably, the basic specifications include the initial resistance of the electrothermal alloy; determining the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications includes: obtaining the resistance-temperature relationship of the electrothermal alloy, wherein the resistance-temperature characteristics include the resistance-temperature relationship, which characterizes the relationship between the resistance of the electrothermal alloy and the temperature at which the electrothermal alloy is located; and determining the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature relationship and the initial resistance.

[0006] Preferably, the basic specifications also include the diameter and length of the electrothermal alloy; determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications includes: obtaining the initial rated power of the electrothermal alloy at the target furnace temperature based on the product of the target surface load, the diameter, and the length.

[0007] Preferably, after determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications, the method further includes: determining the target voltage of the electrothermal alloy at the target furnace temperature based on the initial rated power and the target resistance, wherein the target voltage is the supply voltage required to make the surface load of the electrothermal alloy reach the target surface load at the target furnace temperature.

[0008] Preferably, the power-time relationship of the electrothermal alloy is obtained based on the process of continuously energizing the electrothermal alloy at the target furnace temperature for a preset time, including: periodically collecting multiple power discrete points during the process of continuously energizing the electrothermal alloy at the target voltage and the target furnace temperature for the preset time; and fitting the multiple power discrete points to obtain the power-time relationship.

[0009] Preferably, the target furnace temperature is any temperature between 400-1200℃, and the preset duration is 100 hours.

[0010] Secondly, embodiments of the present invention provide a device for determining the lifespan of an electrothermal alloy, the device comprising: The acquisition module is used to acquire the power attenuation ratio and basic specifications of the electrothermal alloy. The determination module is used to determine the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications; and to determine the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications. The acquisition module is also used to acquire the power-time relationship of the electrothermal alloy based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature; The determining module is further configured to determine the end-of-life power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power, and to determine the attenuation time required for the power of the electrothermal alloy to attenuate to the end-of-life power value at the target furnace temperature based on the power-time relationship, and to use the attenuation time as the lifespan of the electrothermal alloy.

[0011] Thirdly, embodiments of the present invention provide an electronic device, comprising: processor; A memory for storing instructions to be executed by the processor, wherein the processor is configured to execute the instructions to implement the method as described in the first aspect.

[0012] Fourthly, embodiments of the present invention provide a storage medium that, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform the method described in the first aspect.

[0013] Fifthly, embodiments of the present invention provide a computer program product, the program product comprising a computer program, the computer program being executed by a processor as described in the first aspect.

[0014] According to embodiments of the present invention, a method for determining the lifespan of an electrothermal alloy is provided, comprising: obtaining the power attenuation ratio and basic specifications of the electrothermal alloy; determining the target resistance of the electrothermal alloy at a target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications; determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications; obtaining the power-time relationship of the electrothermal alloy based on the process of the electrothermal alloy being continuously energized at the target furnace temperature for a preset time; determining the lifespan termination power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power; and determining the attenuation time required for the power of the electrothermal alloy at the target furnace temperature to attenuate to the lifespan termination power value based on the power-time relationship, and using the attenuation time as the lifespan of the electrothermal alloy. Since the lifespan obtained in the embodiments of the present invention is determined based on the power-time relationship obtained after the electrothermal alloy is continuously energized for a preset time at the target furnace temperature, and the power-time relationship records the power decay path of the electrothermal alloy under the joint constraints of the target furnace temperature and the target surface load, the decay time (lifespan) determined by the power-time relationship can more accurately reflect the effective service life of the electrothermal alloy at the target furnace temperature compared with the extreme environment in the prior art, and has higher accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The flowchart of a method for determining the lifespan of an electrothermal alloy provided in some embodiments of the present invention is shown; Figure 2 The diagram illustrates the power-time relationship provided by some embodiments of the present invention; Figure 3 The diagram illustrates the power-time relationship provided by other embodiments of the present invention; Figure 4 The structure of a device for determining the lifespan of an electrothermal alloy provided in some embodiments of the present invention is shown; Figure 5 The diagram shows a structural block diagram of an electronic device provided in some embodiments of this application. Detailed Implementation

[0017] As described in the background section, existing methods for testing the lifespan of electrothermal alloys typically employ rapid life testing. This involves directly raising the surface temperature of the heating wire to its maximum allowable heating temperature (e.g., 1300℃ for Cr25Al5 alloy) at room temperature and accelerating the material failure process through rapid power switching. The test duration is usually no more than 200 hours. Under these accelerated test conditions, the surface load of the electrothermal alloy can reach 30-50 W / cm², far exceeding the allowable surface load value in the design and use of actual industrial electric heating furnaces. In practical applications, the working environment of the electrothermal alloy is the internal temperature field of the furnace body, and its surface load value is much lower than that of the accelerated test. Furthermore, the heat dissipation boundary conditions (such as radiative heat transfer, furnace atmosphere, and insulation structure) are fundamentally different from the open rapid life test environment. Therefore, the aging data obtained from rapid life testing cannot be directly mapped or converted into the actual service life of the electrothermal alloy under specific furnace temperatures and designed surface loads. The test results are insufficient to effectively guide the selection and design of the furnace body's electrothermal alloy and cannot provide a reliable basis for predicting the lifespan of the furnace body for regular maintenance.

[0018] According to an embodiment of the present invention, a method for determining the lifespan of an electrothermal alloy is provided. Since the lifespan obtained in this embodiment is determined based on the power-time relationship obtained after the electrothermal alloy is continuously energized for a preset time at the target furnace temperature, and the power-time relationship records the power attenuation path of the electrothermal alloy under the joint constraints of the target furnace temperature and the target surface load, the attenuation time (lifespan) determined by the power-time relationship can more accurately reflect the effective service life of the electrothermal alloy at the target furnace temperature compared to the extreme environment in the prior art, and has higher accuracy.

[0019] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0020] It should be understood that the method for determining the lifespan of the electrothermal alloy provided in the embodiments of the present invention can be executed by a target device, which can be one or more electronic devices, which can be a physical server or a cloud server.

[0021] In an embodiment of the present invention, Figure 1 The flowchart illustrates a method for determining the lifespan of an electrothermal alloy according to some embodiments of the present invention. For example... Figure 1 As shown, the method for determining the lifespan of the electrothermal alloy provided in this embodiment of the invention includes steps 110 to 150.

[0022] Step 110: Obtain the power attenuation ratio and basic specifications of the electrothermal alloy.

[0023] In this embodiment of the invention, the electrothermal alloy refers to an alloy material used for electrothermal conversion. Its shape is not limited, and it can typically take the form of wire, strip, rod, or foil to adapt to different heating element structures and installation requirements. The basic specifications are used to characterize the inherent physical and geometric properties of the electrothermal alloy, including but not limited to: nominal diameter (or equivalent cross-sectional area), resistance per unit length (or resistivity), total length, allowable operating temperature range, and surface load.

[0024] In this embodiment of the invention, the power attenuation ratio of the electrothermal alloy refers to the percentage decrease in the actual electrical power consumed by the electrothermal alloy during the continuous heating process until fracture failure, compared to the initial normal operating power.

[0025] In this embodiment of the invention, a standardized test can be conducted using the "Rapid Life Test Method for High Resistance Heating Alloys" (standard number GB / T13300-1991). Heating alloy samples of the same type and batch are selected and randomly divided into three batches (each batch may contain multiple parallel samples). Each batch is placed in a specified test temperature and atmosphere environment, and a rated operating voltage is applied continuously until the sample fractures naturally. During the test, a power acquisition device records the operating voltage and current of each sample in real time, calculates the instantaneous power, and focuses on capturing the ratio between the power data in the last second before fracture and the initial normal operating power as the power attenuation ratio of that sample. After testing the three batches of samples separately, the average result of each batch is taken as the power attenuation ratio of that type of heating alloy, thus eliminating random errors from a single test and improving the representativeness and reliability of the data.

[0026] Step 120: Determine the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications.

[0027] In this embodiment of the invention, the resistance-temperature characteristic refers to the physical law governing the change of the resistance (or resistivity) of the electrothermal alloy material with temperature, specifically including but not limited to: the material's resistance temperature coefficient (α, usually referring to the average rate of change within a specific temperature range), the resistance-temperature relationship curve, and the relative resistance-temperature correction coefficient. The target furnace temperature refers to the ambient temperature in which the electrothermal alloy is located during actual heating applications, typically the set temperature of the heated furnace or the constant temperature zone temperature required by the process.

[0028] In this embodiment of the invention, the basic specifications of the electrothermal alloy include the initial resistance of the electrothermal alloy (which can be expressed as R). 初The initial resistance of an electrothermal alloy is the original resistance value measured at a reference temperature (usually room temperature, 20°C). The magnitude of the initial resistance value is usually determined by the alloy's material composition, processing technology, and geometric dimensions (length and cross-sectional area).

[0029] In this embodiment of the invention, during the process of determining the target resistance of the electrothermal alloy at the target furnace temperature based on its resistance-temperature characteristics and basic specifications, the resistance-temperature relationship of the electrothermal alloy can be obtained. The resistance-temperature characteristics include this relationship, which characterizes the relationship between the resistance of the electrothermal alloy and its temperature. Based on the resistance-temperature relationship and the initial resistance, the target resistance of the electrothermal alloy at the target furnace temperature is determined. Specifically, the resistance-temperature relationship is preferably a relative resistance-temperature correction coefficient, which characterizes the relative magnitude of the change in the resistance value of the electrothermal alloy as the temperature increases. For different grades of electrothermal alloys, the relative resistance-temperature correction coefficient can be found in a material handbook or obtained in advance through experimental calibration. First, the relative resistance-temperature correction coefficient K corresponding to the target furnace temperature is obtained. The initial resistance R... 初 Multiplying this by the relative resistance temperature correction factor K yields the target resistance (which can be expressed as R) of the electrothermal alloy at the target furnace temperature. 炉温 (Unit: Ω). The relative resistance temperature correction factor can be stored and retrieved in various forms. For example, it can be stored in a database as a table of correction factors corresponding to discrete temperature points, and the target furnace temperature can be looked up and linearly interpolated during calculation; or it can be expressed as a fitted polynomial function, and the target furnace temperature can be directly substituted into the function to obtain the corresponding correction factor during calculation.

[0030] Step 130: Determine the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications.

[0031] In this embodiment of the invention, the basic specifications also include the diameter (which can be expressed as d, in mm) and length (which can be expressed as L, in m) of the heating alloy. The target surface load refers to the rated electrical power density that the heating alloy can withstand per unit surface area at the target furnace temperature, usually expressed as ω, in W / cm². The target surface load is typically determined by multiple factors, including the material properties of the heating alloy, heating conditions, lifespan targets, and standard specifications, and can be obtained from the manufacturer of the heating alloy.

[0032] In this embodiment of the invention, during the process of determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications, the initial rated power of the electrothermal alloy at the target furnace temperature can be obtained by the following formula based on the product of the target surface load, the diameter, and the length: P 初 =ω*π*d*L Among them, P 初 The initial rated power of the electrothermal alloy at the target furnace temperature; ω is the target surface load of the electrothermal alloy at the target furnace temperature; d is the diameter of the electrothermal alloy; L is the length of the electrothermal alloy.

[0033] In this embodiment of the invention, after determining the initial rated power of the electrothermal alloy at the target furnace temperature, a target voltage of the electrothermal alloy at the target furnace temperature can also be determined based on the initial rated power and the target resistance. The target voltage is the supply voltage required to bring the surface load of the electrothermal alloy to the target surface load at the target furnace temperature. Specifically, according to the electric power formula P = U² / R, the initial rated power is used as the P value, and the target resistance obtained in step 120 is used as the R value for calculation, thus obtaining the target voltage U = √(P² / R). 初 ×R 炉温 ).

[0034] After obtaining the target voltage according to step 130, a voltage of the target voltage magnitude can be applied to the electrothermal alloy that has been loaded into the test furnace, and the furnace temperature can be raised to and stabilized at the target furnace temperature.

[0035] Step 140: Based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature, obtain the power-time relationship of the electrothermal alloy.

[0036] In this embodiment of the invention, the target furnace temperature can be any temperature between 400-1200℃, such as 1100℃, and the preset duration can be any positive integer duration, such as 50 hours, 100 hours, etc. During the preset duration of continuous energization of the electrothermal alloy at the target voltage and the target furnace temperature, multiple discrete power points are periodically collected at preset time intervals. The collection can be performed by recording the instantaneous power value at each sampling moment in real time using a high-precision power meter or a voltage / current sampling module. The sampling interval can be flexibly set according to the test accuracy requirements and the total duration to obtain a sufficient density of data points characterizing the power change trend. The preset time interval can be any duration, such as 30s, 1min, 2min, etc. The accuracy of the power-time relationship obtained is positively correlated with the time interval of the collection; that is, the shorter the time interval of the collection, the higher the accuracy of the determined power-time relationship. Subsequently, the collected multiple discrete power points are fitted. Specifically, using energizing time as the abscissa and measured power value as the ordinate, all discrete points are plotted on a coordinate plane to form a scatter plot of power changing with time. Linear regression or least-squares fitting is then performed on the power discrete points on the scatter plot to obtain the fitting formula for the power-time relationship. This fitting formula is generally expressed as a linear function of power changing with time, for example, P(t) = a·t + b, where P(t) represents the power value of the electrothermal alloy at time t under the target voltage and target furnace temperature, the slope a reflects the power decay rate, and the intercept b is the power estimate at the initial fitting time.

[0037] Step 150: Determine the life-end power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power, and determine the attenuation time required for the power of the electrothermal alloy to attenuate to the life-end power value at the target furnace temperature based on the power-time relationship, and use the attenuation time as the life-end power of the electrothermal alloy.

[0038] In this embodiment of the invention, the life-end power value of the electrothermal alloy at the target furnace temperature is first determined based on the power attenuation ratio and the initial rated power. The life-end power value refers to the critical point at which the electrothermal alloy is about to fracture and fail due to local overheating caused by increased resistance and power attenuation at the target furnace temperature and the target voltage. Specifically, the life-end power value can be obtained by combining the power attenuation ratio obtained in step 110 and the initial rated power obtained in step 130, i.e., by calculating the difference between 1 and the power attenuation ratio, and the product of the initial rated power and the difference is taken as the life-end power value. The life-end power value is then substituted into the fitting formula of the power-time relationship obtained in step 140 as a known power threshold (i.e., P(t) in step 140), and the attenuation time t required to solve the problem in reverse with the life-end power value as the dependent variable is taken as the life duration. This allows for the rapid calculation of the predicted service life of the electrothermal alloy at the target furnace temperature and target surface load.

[0039] In this embodiment of the invention, the lifespan obtained is determined by the power-time relationship obtained after the electrothermal alloy is continuously energized for a preset time at the target furnace temperature. The power-time relationship records the power decay path of the electrothermal alloy under the combined constraints of the target furnace temperature and the target surface load. Therefore, the decay time (lifespan) determined by the power-time relationship can more accurately reflect the effective service life of the electrothermal alloy at the target furnace temperature compared to the extreme environment in the prior art, and has higher accuracy.

[0040] In this embodiment of the invention, in order to better understand the method for determining the lifespan of the electrothermal alloy provided by this embodiment of the invention, examples are given below. It should be understood that the examples are not intended to be limiting.

[0041] Example 1: First, the rapid life test method of 0.8mm Cr20Ni40 samples at 1150℃ was used to test the rapid life at 1150℃. The power attenuation ratios at normal fracture were 15.9%, 16.3%, and 16.2%, respectively. The average value of 16.13% was taken as the power attenuation ratio.

[0042] Secondly, the diameter d = 1.284 mm and resistance R of the heating alloy wire to be tested were measured. 初 Using a resistance of 1.2585Ω and a length of L=1.810m as the basic specifications, the resistance-temperature characteristic includes a relative resistance-temperature correction factor of 1.20. Therefore, the resistance R of the tested heating alloy wire at the target furnace temperature of 1100℃ is calculated. 炉温 =1.5102Ω, based on the target surface load of 4w / cm 2 Calculate the target voltage U = 21V and the initial rated power P. 初=292W. The heating alloy wire to be tested was loaded into the test furnace, the furnace temperature was raised to the target furnace temperature of 1100℃, and the heating alloy wire to be tested was energized for 100h at the target voltage of 21V. The power dispersion point of the heating alloy wire to be tested was recorded every two minutes.

[0043] Finally, the power discrete points were plotted as a function of time. Figure 2 The diagram illustrates the power-time relationship provided by some embodiments of the present invention. Figure 2 The discrete points shown are the power discrete points. For example... Figure 2 Fitting the straight line segment formed by the power discrete points shown, we obtain the fitting formula for the power-time relationship: Y = 292.1539 - 0.29865X, expressed as... Figure 2 The straight line on the line. The initial rated power of 292W is calculated, and the power attenuation ratio of 16.13% is combined to obtain the end-of-life power value, approximately 245W. Substituting this end-of-life power value into the power-time relationship fitting formula, the time required for the tested electrothermal alloy wire to reach the end-of-life power value from the initial rated power is found to be 158 hours. That is, at a furnace temperature of 1100℃, the target surface load is 4 W / cm². 2 The service life of the electrothermal alloy Cr20Ni40 is 158 hours.

[0044] Example 2: First, the rapid life test method of three batches of 0.8mm 0Cr20Al6RE samples at 1300℃ was used to test the rapid life at 1300℃. The power attenuation ratios at normal fracture were 23.7%, 22.2%, and 22.9%, respectively. The average value of 22.93% was taken as the power attenuation ratio.

[0045] Secondly, the diameter d = 1.832 mm and resistance R of the heating alloy wire to be tested were measured. 初 =0.5248Ω, length L=0.950m as the basic specifications. The resistance temperature characteristic includes a relative resistance temperature correction factor of 1.046. Target furnace temperature 1100℃, resistance Rfurnace temperature1==0.5489Ω, based on the target surface load of 7w / cm2. 2 Calculate the required voltage U = 14.5V and the initial rated power P. 初 =383W. The heating alloy wire to be tested was loaded into the test furnace, the furnace temperature was raised to the target furnace temperature of 1100℃, and the heating alloy to be tested was energized for 100h according to the target voltage U=14.5V. The power discrete point of the heating alloy to be tested was recorded every two minutes.

[0046] Finally, the power discrete points were plotted as a function of time. Figure 3 The diagram illustrates the power-time relationship provided by other embodiments of the present invention. Figure 3 The discrete points shown are the power discrete points. For example... Figure 3 Fitting the straight line segment formed by the power discrete points shown, we obtain the fitting formula for the power-time relationship: Y = 382.97692 - 0.19482X, expressed as... Figure 3 The straight line on the line. The initial rated power of 383W and the power attenuation ratio of 22.93% are combined to obtain the end-of-life power value, approximately 295W. Substituting this end-of-life power value into the power-time relationship fitting formula, the time required for the tested electrothermal alloy wire to reach the end-of-life power value from the initial rated power is calculated to be 451 hours. That is, at a furnace temperature of 1100℃, the target surface load is 7 W / cm². 2 The service life of the electrothermal alloy 0Cr20Al6RE is 451 hours.

[0047] In this embodiment of the invention, the fitting formula for the power-time relationship can simulate the actual operating conditions of the electrothermal alloy. By testing for a short period of time and observing the power changes during the material damage process, the actual service life of the electrothermal alloy can be predicted, so that the predicted service life has higher accuracy.

[0048] In an embodiment of the present invention, Figure 4 The structure of a device for determining the lifespan of an electrothermal alloy, provided in an embodiment of the present invention, is shown. For example... Figure 4 As shown, an embodiment of the present invention provides a device 400 for determining the lifespan of an electrothermal alloy, comprising: The acquisition module 410 is used to acquire the power attenuation ratio and basic specifications of the electrothermal alloy. The determining module 420 is used to determine the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications; and to determine the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications. The acquisition module 410 is also used to acquire the power-time relationship of the electrothermal alloy based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature; The determining module 420 is further configured to determine the life-end power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power, and to determine the attenuation time required for the power of the electrothermal alloy to attenuate to the life-end power value at the target furnace temperature based on the power-time relationship, and to use the attenuation time as the life-end power of the electrothermal alloy.

[0049] It should be noted that the embodiments of the device for determining the life of the electrothermal alloy in this specification and the embodiments of the method for determining the life of the electrothermal alloy in this specification are based on the same inventive concept. Therefore, the specific implementation of this embodiment can be referred to the corresponding embodiments of the method for determining the life of the electrothermal alloy mentioned above, and the repeated parts will not be described again.

[0050] Figure 5 This is a structural block diagram of an electronic device provided in an embodiment of this application. Figure 5 As shown, the electronic device provided in this application embodiment includes a processor 510 and a memory 520, wherein the memory is used to store instructions executable by the processor; wherein the processor is configured to execute the instructions to implement any of the embodiments provided in the above method embodiments.

[0051] In an exemplary embodiment, the electronic device may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the method for determining the lifespan of the electrothermal alloy provided in any of the above method embodiments.

[0052] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory including instructions, which can be executed by a processor of a device to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc. When the instructions in this non-transitory computer-readable storage medium are executed by a processor of an electronic device, the electronic device is able to perform the method for determining the lifespan of the electrothermal alloy provided in any of the above-described method embodiments.

[0053] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the method for determining the lifespan of an electrothermal alloy provided in any of the above-described method embodiments.

[0054] The above description does not provide detailed technical specifications regarding the structure of each layer. However, those skilled in the art should understand that layers and regions of desired shapes can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be advantageously combined.

[0055] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0056] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for determining the lifespan of an electrothermal alloy, characterized in that, The method includes: Obtain the power attenuation ratio and basic specifications of the electrothermal alloy; Based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications, determine the target resistance of the electrothermal alloy at the target furnace temperature. The initial rated power of the electrothermal alloy at the target furnace temperature is determined based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications. Based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature, the power-time relationship of the electrothermal alloy is obtained; The lifespan power value of the electrothermal alloy at the target furnace temperature is determined based on the power attenuation ratio and the initial rated power. The attenuation time required for the power of the electrothermal alloy to decay to the lifespan power value at the target furnace temperature is determined based on the power-time relationship. The attenuation time is taken as the lifespan of the electrothermal alloy.

2. The method as described in claim 1, characterized in that, The basic specifications include the initial resistance of the electrothermal alloy; Determining the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications includes: Obtain the resistance-temperature relationship of the electrothermal alloy, wherein the resistance-temperature characteristic includes the resistance-temperature relationship, which is used to characterize the relationship between the resistance of the electrothermal alloy and the temperature at which the electrothermal alloy is located. Based on the resistance-temperature relationship and the initial resistance, the target resistance of the electrothermal alloy at the target furnace temperature is determined.

3. The method as described in claim 2, characterized in that, The basic specifications also include the diameter and length of the electrothermal alloy; Based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications, the initial rated power of the electrothermal alloy at the target furnace temperature is determined, including: The initial rated power of the electrothermal alloy at the target furnace temperature is obtained by multiplying the target surface load, the diameter, and the length.

4. The method as described in claim 3, characterized in that, After determining the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications, the method further includes: Based on the initial rated power and the target resistance, the target voltage of the electrothermal alloy at the target furnace temperature is determined. The target voltage is the supply voltage required to make the surface load of the electrothermal alloy reach the target surface load at the target furnace temperature.

5. The method as described in claim 4, characterized in that, Based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature, the power-time relationship of the electrothermal alloy is obtained, including: During the process of continuously energizing the electrothermal alloy for the preset duration at the target voltage and the target furnace temperature, multiple discrete power points are periodically collected; The power-time relationship is obtained by fitting the multiple discrete power points.

6. The method according to any one of claims 1-5, characterized in that, The target furnace temperature is any temperature between 400-1200℃, and the preset duration is 100 hours.

7. A device for determining the lifespan of an electrothermal alloy, characterized in that, The device includes: The acquisition module is used to acquire the power attenuation ratio and basic specifications of the electrothermal alloy. The determination module is used to determine the target resistance of the electrothermal alloy at the target furnace temperature based on the resistance-temperature characteristics of the electrothermal alloy and the basic specifications; and to determine the initial rated power of the electrothermal alloy at the target furnace temperature based on the target surface load of the electrothermal alloy at the target furnace temperature and the basic specifications. The acquisition module is also used to acquire the power-time relationship of the electrothermal alloy based on the process of the electrothermal alloy being continuously energized for a preset time at the target furnace temperature; The determining module is further configured to determine the end-of-life power value of the electrothermal alloy at the target furnace temperature based on the power attenuation ratio and the initial rated power, and to determine the attenuation time required for the power of the electrothermal alloy to attenuate to the end-of-life power value at the target furnace temperature based on the power-time relationship, and to use the attenuation time as the lifespan of the electrothermal alloy.

8. An electronic device, characterized in that, The electronic device includes: processor; A memory for storing instructions to be executed by the processor, wherein the processor is configured to execute the instructions to implement the method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device is able to perform the method as claimed in any one of claims 1 to 6.

10. A computer program product, characterized in that, The program product includes a computer program that is executed by a processor using the method as described in any one of claims 1 to 6.

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