CN114480829A - Method for simulating heat treatment process of equipment in process of different thicknesses by heat treatment test plate - Google Patents
Method for simulating heat treatment process of equipment in process of different thicknesses by heat treatment test plate Download PDFInfo
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Abstract
The invention relates to the technical field of heat treatment, and discloses a method for simulating heat treatment processes of equipment in processes with different thicknesses by using a heat treatment test plate, which comprises the steps of providing a preset heat treatment test plate; carrying out a heat treatment test on the preset heat treatment test plate to obtain heat treatment parameters of the preset heat treatment test plate; and simulating the heating power and the wall thickness temperature difference of the heat treatment test plates with different thicknesses according to the heat treatment test result of the preset heat treatment test plate. The invention provides a method for simulating local heat treatment processes of equipment with different thicknesses by using a heat treatment test plate, which simulates a field weld joint through the heat treatment test plate to carry out a heat treatment test to obtain a parameter curve of the heat treatment test, so as to guide the heat treatment of process equipment, effectively avoid the field heat treatment failure of the process equipment and provide a test means for the internal temperature of the weld joint. By the test and simulation method provided by the invention, the heat treatment test plate with one thickness can replace various heat treatment test plates with different thicknesses, and the heat treatment test cost is reduced.
Description
Technical Field
The invention relates to the technical field of heat treatment, in particular to a method for simulating heat treatment process of equipment in a process with different thicknesses by using a heat treatment test plate.
Background
In recent decades, with the demand for industrial production and the development of the scientific and technical level, process equipment has gradually become large-scale and highly parametric. The large-scale equipment makes higher demands on equipment manufacturing, and particularly, some large-scale equipment cannot be manufactured completely in a manufacturing plant, and only a plurality of parts can be manufactured in the manufacturing plant and then assembled and welded on the using site. As the equipment becomes larger, the thickness thereof becomes larger, and the residual stress and the hardening tendency tend to occur more easily after the welding process. It is particularly important to heat treat process equipment to improve mechanical properties and eliminate welding defects that may occur. In-situ heat treatment of large devices is the last step in the manufacture of the devices. The heat treatment is different from the processes of welding, nondestructive detection and the like, the heat treatment after welding is continuously completed once, the heat treatment quality is determined accordingly, and the heat treatment is successful if the quality meets the requirements; if the quality is not in accordance with the specification, the heat treatment fails, so that the possibility of second re-coming is difficult, and the possibility of 'repair' does not exist. If the last process fails, all previous labor has been overwhelming, especially with large equipment.
The large-scale equipment welded on site can only adopt local heat treatment, is limited by the conditions on site, and how to ensure the heat treatment temperature of the welding seam of the large-scale equipment is very important. Because the equipment wall thickness is great, there is the inhomogeneous phenomenon of temperature in thickness direction, and the equipment that will pay for use also can't punch the temperature measurement in inside, and the temperature in the middle of the equipment wall thickness is never known, and this brings very big risk for thermal treatment.
The local heat treatment process is mainly divided into 5 stages, namely a rapid heating stage below 300 ℃, and the heating can be finished within 1 hour; a slow temperature rise stage from more than 300 ℃ to the heat treatment temperature, wherein the temperature rise rate is related to the plate thickness, and the thicker the plate thickness is, the slower the temperature rise rate is; maintaining the heat treatment temperature for a certain time according to the heat treatment process in the heat preservation stage, and heating the heat treatment part to ensure the heat treatment temperature; fourthly, in the slow cooling stage, furnace cooling is generally adopted for the overall heat treatment in the furnace, and the speed of the local heat treatment can be controlled for cooling in a heat preservation state; and (6) cooling at normal temperature.
The heat treated panels were tested mainly for the first 3 stages. In the prior art, devices with different thicknesses have different heat treatment processes, different heat treatment test plates should be correspondingly equipped, and the cost of raw materials of each test plate, as well as the cost of processing, manufacturing and punching, will bring huge economic cost and time cost for processing the heat treatment test plates by each device.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a method for simulating a heat treatment process of a device during a process of different thicknesses by a heat treatment test plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for simulating heat treatment process of equipment in different thickness processes by using a heat treatment test plate comprises the following steps:
providing a preset heat treatment test plate, wherein at least one side of the preset heat treatment test plate is provided with a heating element and a heat preservation element in a stacking mode, the heating element is located between the preset heat treatment test plate and the heat preservation element, a welding line is arranged in the center of the preset heat treatment test plate, and the center lines of the heating element and the heat preservation element are coincident with the center line of the welding line;
carrying out a heat treatment test on the preset heat treatment test plate to obtain heat treatment parameters of the preset heat treatment test plate;
and simulating the heating power and the wall thickness temperature difference of the heat treatment test plates with different thicknesses according to the heat treatment test result of the preset heat treatment test plate.
Preferably, holes are punched in the middle of the welding seam of the heat treatment test plate, on the welding seam fusion line and on the upper surface, the middle of the edge of the temperature-equalizing zone and the lower surface of the edge of the temperature-equalizing zone to serve as temperature measuring points, temperature measuring elements are placed in the holes, and temperature detection is carried out during heat treatment tests.
Preferably, the heat treatment parameters of the preset heat treatment test plate obtained according to the test comprise heat treatment heating power, and the convection heat transfer coefficient is calculated according to the heating power.
Preferably, the heat treatment parameters include heating powers of the preset heat treatment test plate in a rapid heating-up stage, a slow heating-up stage and a heat preservation stage.
Preferably, the method for simulating the heating power of the heat treatment test panels with different thicknesses during single-sided heating comprises the following steps:
1) fast warm-up phase
The heating can be completed within 1 hour within the range of room temperature to 300 ℃, namely T is 3600s, the temperature difference delta T is 300 ℃ to room temperature, and the heating power is as follows:
2) slow temperature rise phase
The heating power is as follows:
3) stage of heat preservation
P＝2αA(T-TW)
Wherein Q is heat, J; rho is the density of the test plate in kg/m3(ii) a c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m2；δ2M, the thickness of the heat-treated test plate to be predicted; Δ T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature. P1For convective heat transfer power, W; alpha is convection heat transfer coefficient, W/m2DEG C; t is the temperature of the test plate, DEG C; t isWIs at ambient temperature, DEG C.
Preferably, because the test panels with different thicknesses have different uniform temperature zone widths, when the test panels with different thicknesses are subjected to heating power simulation, the following coefficients are adopted for correction:
where gamma is the correction factor, delta1To test the thickness of the heat-treated test panels, delta2Is the thickness of the heat-treated test plate to be simulated;
the heating power in the slow temperature rise stage is corrected as follows:
the heating power in the heat preservation stage is corrected as follows:
P＝2γαA(T-TW)
preferably, during double-sided heating, the heating power of the upper surface and the lower surface of the rapid heating stage, the slow heating stage and the heat preservation stage is respectively half of that of single-sided heating.
Preferably, the heat treatment parameters further include the temperature difference in the thickness direction of the preset heat treatment test plate in the rapid heating stage, the slow heating stage and the heat preservation stage.
Preferably, the method for simulating the temperature difference in the thickness direction of the heat-treated test panels with different thicknesses during single-sided heating comprises the following steps:
1) fast warm-up phase
2) Slow temperature rise phase
3) Stage of heat preservation
Preferably, the temperature difference in the thickness direction during double-sided heating in the rapid heating stage, the slow heating stage and the heat preservation stage is one fourth of the temperature difference in the thickness direction during single-sided heating.
It should be noted that the temperatures given in the present invention are the final heating temperatures at each stage, not the intermediate process temperatures.
Compared with the prior art, the method for simulating the local heat treatment process of the equipment with different thicknesses by using the heat treatment test plate is provided, the field welding seam is simulated by using the heat treatment test plate to carry out the heat treatment test, and the parameter curve of the heat treatment test is obtained, so that the heat treatment of the process equipment is guided, the field heat treatment failure of the process equipment can be effectively avoided, and a test means is provided for the internal temperature of the welding seam. By the test and simulation method provided by the invention, the heat treatment test plate with one thickness can replace various heat treatment test plates with different thicknesses, so that the heat treatment test cost is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of a heat-treated test plate;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a temperature time profile of an example heat treatment;
FIG. 4 shows the heating power of test plates of different thicknesses simulated by a heat treatment test on a test plate of 120mm thickness;
FIG. 5 is a temperature difference in the wall thickness direction of test plates of different thicknesses simulated by a heat treatment test on a test plate of 120mm thickness;
FIG. 6 is a graph showing the heating power of test panels of different thicknesses simulated in a heat treatment test of a test panel of 94mm thickness;
FIG. 7 is a temperature difference in the wall thickness direction of test plates of different thicknesses simulated by a heat treatment test on a test plate of 94mm thickness;
FIG. 8 is a graph of simulated heating power for test panels of different thicknesses in a 62mm thick test panel heat treatment test;
FIG. 9 shows the temperature difference in the wall thickness direction of test panels of different thicknesses simulated by the heat treatment test of the test panel of 62mm thickness.
Reference numerals: h isk-weld width; HB-heating belt width; GCB-width of the heat insulation belt; SB-width of temperature-equalizing band; delta0-thickness of the insulation layer; delta1-a test panel thickness; l-test plate length; w-width of test plate, 1-temperature measuring point.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
A method for simulating heat treatment process of equipment in different thickness processes by using a heat treatment test plate comprises the following steps:
one) Heat treatment test
Taking the double-sided heat treatment of the Q345R heat treatment test plate with the thickness of 120mm as an example, a heating sheet and a heat insulation layer are sequentially laid on two sides of a welding seam, and the widths of the heating sheet and the heat insulation layer are the same as the width of the heat treatment test plate and are both 500 mm. The length of the heating sheet is 300mm, the length of the heat-insulating layer is 800mm, and the length of the test panel is 2000 mm. Punching holes at key points such as the middle of a welding line of a heat treatment test plate, a welding line fusion line, the upper surface, the middle and the lower surface of the edge of a temperature-equalizing zone and the like to be used as temperature measuring points, placing temperature measuring element thermocouples, and detecting the temperature of the key points during a heat treatment test, specifically referring to FIG. 1, wherein thermocouple temperature measuring points 1 are arranged at 9 positions in FIG. 1, and temperature is detected during the heat treatment test;
performing a heat treatment test according to a heat treatment process, wherein the Q345R belongs to Fe-1 materials, the lowest heat treatment temperature is 600 ℃, heating is performed at different heating rates according to the heat treatment process, the heating can be completed within 1h at the stage of 20-300 ℃, and within the range of 300-600 ℃, the heating is performed at a heating rate of 5500/delta according to GB/T30583-2014, wherein delta is the thickness of the container and is 120mm, and the heating rate of the section is calculated to be 45 ℃/h; however, GB/T30583-2014 stipulates that the heating rate cannot be lower than 55 ℃/h, if no harmful effect is generated, the heating and cooling speeds can be reduced, and the temperature rise rate of the section is 45 ℃/h according to the two specification requirements, and the section needs to be heated at the temperature rise rate of the section6.6 h. The heat preservation time is
2.7 h/100, wherein deltaPWTHIs the postweld heat treatment thickness. The finally determined local heat treatment process of the equal-thickness welding is shown in the table 1, and the total heat treatment time is 10.3h (excluding the cooling time).
TABLE 1 local heat treatment process for rectangular heat-treated test plate
And obtaining the heating power of each stage and the temperature change curve of each key point along with time through a heat treatment test.
Carrying out a heat treatment test, and adjusting the heat treatment heating power according to the measured temperature to finally obtain the proper heating power; the temperature of the heat treatment during the test was recorded to obtain a temperature profile of the heat-treated test panel, as shown in fig. 2. And (4) formulating a process equipment heat treatment process according to the heating power and the temperature curve of the heat treatment test plate, and carrying out heat treatment on the process equipment according to the heat treatment process.
II) calculating heat transfer coefficients of different stages according to heating power
Heat quantity required for temp. rise of test plate
Q＝ρ·c·A·δ1·ΔT (1)
Wherein Q is heat, J; rho is the density of the test plate in kg/m3(ii) a c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m2；δ1Test heat treatment test panel thickness, m; Δ T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature.
The convective heat transfer power between the test plate and the air can be expressed as a formula (2), and because the test plate simultaneously transfers heat to the part outside the self heating area, transfers heat to the heat preservation layer and convects heat between the heat preservation layer and the air in the process of heating the test plate by the heater, the energy losses are totally classified into convective heat transfer for convenient calculation.
P1＝2αA(T-TW) (2)
Wherein P is1For convective heat transfer power, W; alpha is convection heat transfer coefficient, W/m2DEG C; t is the temperature of the test plate, DEG C; t isWIs at ambient temperature, DEG C.
1) Fast warm-up phase
Heating can be completed within 1 hour at room temperature to 300 ℃, i.e. T3600 s and Δ T280 ℃ (assuming room temperature is 20 ℃).
The heating power is as follows:
let equation (3) equal the measured power at this stage to calculate α.
Obtaining:
2) slow temperature rise phase
The slow heating is adopted within the temperature range of 300-final heat treatment, and according to GB/T30583-2014, the heating rate is as follows:
wherein dT is the temperature rise rate, DEG C/s; delta2M is the thickness of the test panel to be simulated;
the temperature difference delta T is T-300; t is the heating temperature.
The heating time was obtained as follows:
the heating power is as follows:
let equation (6) equal the measured power at this stage to calculate α.
Obtaining:
3) stage of heat preservation
The heating power in the heat preservation stage is to balance the heat dissipation of the test board to the periphery, i.e. the heat convection between the test board and the air is P1The phases P and P1Equal, therefore:
P＝2αA(T-TW) (9)
obtaining:
α＝P/2A(T-TW) (10)
let equation (7) equal the measured power at this stage to calculate α.
Three) simulation of heat-treated test panels of other thicknesses
The time required for the heat treatment process of the heat-treated test plates of the equipment with different thicknesses can be calculated by the method introduced in the second step, but the heating power and the temperature difference in the thickness direction of the test plates with different thicknesses can be determined by testing according to the different test plates. According to the calculated convection heat transfer coefficient and the physical property parameters of the material, the following method is adopted to determine the heat treatment heating power and the temperature difference in the thickness direction of the test plates with different thicknesses, so that one test plate with one thickness can replace test plates with various thicknesses.
I) determination of the heating output
Heat quantity required for temp. rise of test plate
Q＝ρ·c·A·δ2·ΔT (11)
Wherein Q is heat, J; rho is the density of the test plate in kg/m3(ii) a c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m2；δ2Thickness of the heat-treated test plate to be simulated, m; Δ T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature.
The convective heat transfer power between the test plate and the air can be expressed as a formula (2), and because the test plate simultaneously transfers heat to the part outside the self heating area, transfers heat to the heat preservation layer and convects heat between the heat preservation layer and the air in the process of heating the test plate by the heater, the energy losses are totally classified into convective heat transfer for convenient calculation.
P1＝2αA(T-TW) (2)
Wherein P is1For convective heat transfer power, W; alpha is convection heat transfer coefficient, W/m2DEG C; t is the temperature of the test plate, DEG C; t isWIs at ambient temperature, DEG C.
1) Fast warm-up phase
Heating can be completed within 1 hour at room temperature to 300 ℃, i.e. T3600 s and Δ T280 ℃ (assuming room temperature is 20 ℃).
The heating power is as follows:
heat dissipation (P) for test panels of different thicknesses1) The parts are basically the same, the density rho, the specific heat c and the area A of the plates with different thicknesses are the same, the difference of the heating power mainly depends on the thickness, and the larger the thickness is, the larger the heating power is.
2) Slow temperature rise phase
The slow heating is adopted within the temperature range of 300-final heat treatment, and according to GB/T30583-2014, the heating rate is as follows:
wherein dT is the temperature rise rate, DEG C/s; delta2M is the thickness of the test panel to be simulated;
the temperature difference delta T is T-300; t is the heating temperature.
The heating time was obtained as follows:
the heating power is as follows:
heat dissipation (P) for test panels of different thicknesses1) The parts are basically the same, the density rho, the specific heat c and the area A of the plates with different thicknesses are the same, and the heating power in the slow heating stage is irrelevant to the thickness of the test plate.
3) Stage of heat preservation
The heating power in the heat preservation stage is to balance the heat dissipation of the test board to the periphery, i.e. P1The expression form is shown in formula (2).
P＝2αA(T-TW) (2)
The term is independent of the thickness, and the heating power in the heat preservation stage is independent of the thickness of the test plate.
In actual operation, as the thickness of a test plate is increased, the width of a welding seam is correspondingly increased, the size of a temperature equalizing zone needs to be increased, and the heating power needs to be improved in order to ensure that the wider temperature equalizing zone meets the requirement of heat treatment temperature; conversely, the heating power needs to be reduced. Although the heating power required in the slow temperature rise stage and the heat preservation stage is theoretically independent of the thickness of the test plate, the heating power of the thick plate needs to be larger than that of the thin plate in order to ensure that a wider uniform temperature zone meets the requirement of heat treatment temperature. Therefore, the correction is carried out according to the groove of the welding seam, and when the thickness of the welding seam is larger, a double U-shaped groove or a double V-shaped groove is adopted, and the correction is carried out by taking the double U-shaped groove as an example. Because the inclination angle of the double U-shaped groove is 5-10 degrees, the following coefficients are adopted for correction:
where gamma is the correction factor, delta1To test the thickness of the heat-treated test panels, delta2Is the thickness of the heat treated test panel to be simulated.
Therefore, the heating power in the slow heating-up stage is corrected to be:
the heating power in the heat preservation stage is corrected as follows:
P＝2γαA(T-TW) (18)
II) determination of the temperature difference
The temperature difference in the wall thickness direction can be obtained according to a heat conduction formula:
wherein T isδThe temperature difference in the wall thickness direction is DEG C; p is power, W; a is the heat transfer area, m2(ii) a Lambda is the heat conduction coefficient, W/m ℃; delta2The thickness in the heat transfer direction of the test piece to be simulated, m, is equal to the thickness of the test piece when heated on one side.
If the heating is double-sided heating, P is half of the total heating power, A is 2 times of the total heat transfer area, and the formula (8) is
1) Fast warm-up phase
It can be seen that the temperature difference in the wall thickness direction is in direct proportion to the square of the wall thickness, when double-sided heating is adopted, the thickness of the heat conduction direction is half of that when single-sided heating is adopted, and the heating power of each side is also half of that of the original side, namely:
2) slow temperature rise phase
Therefore, the temperature difference in the wall thickness direction is in direct proportion to the thickness in the heat conduction direction, namely the plate thickness, in the slow temperature rise stage, the power is halved due to halving of the plate thickness in the double-sided heating process, and the temperature difference is one fourth of that in the single-sided heating process.
3) Stage of heat preservation
The temperature difference in the wall thickness direction in the heat preservation stage is also in direct proportion to the plate thickness, and the temperature difference in the thickness direction in the double-sided heating is half of that in the single-sided heating. The temperature difference in the wall thickness direction at the heat-retaining stage is also proportional to the plate thickness, and therefore, the temperature difference in the thickness direction during double-sided heating is one fourth of that during single-sided heating.
Four) simulation of process equipment thermal processing parameters
In this embodiment, the heat flux density at each heat treatment stage is calculated by using the following formula:
wherein t is the heat transfer time.
The heat treatment heating power of the process device can be simulated according to the heat flow density and the heating area of the corresponding process device.
It should be noted that the temperatures given in the present invention are the final heating temperatures at each stage, not the intermediate process temperatures.
Examples 1
A heat treatment test plate with the thickness of 120mm is adopted for testing, the convection heat transfer coefficient is calculated, and test plates with other thicknesses are simulated.
TABLE 2 comparison of physical Properties of heat-treated test panels of Q345R Material
TABLE 3 simulation process of heating power and temperature difference of heat-treated test plates with different thicknesses
EXAMPLES example 2
A94 mm heat treatment test plate is adopted for testing, the convection heat transfer coefficient is calculated, and test plates with other thicknesses are simulated.
TABLE 4 simulation of heating power and temperature difference for different thickness heat treatment test plates
EXAMPLE 3
A62 mm heat treatment test plate is adopted for testing, the convection heat transfer coefficient is calculated, and test plates with other thicknesses are simulated.
TABLE 5 simulation process of heating power and temperature difference of heat-treated test plates with different thicknesses
The test is carried out by using a Q345R test board with the thickness of 120mm, so that the heating power simulation and the temperature difference simulation are carried out on the heat treatment test boards with other thicknesses, and the comparison with the test results is shown in FIG. 4 and FIG. 5; the test is carried out by using a Q345R test board with the thickness of 94mm, so that the heating power simulation and the temperature difference simulation are carried out on the heat treatment test boards with other thicknesses, and the comparison with the test results is shown in FIGS. 6 and 7; tests were conducted using a 62mm thick Q345R test panel to perform heating power simulations and temperature differential simulations for other thickness heat treated test panels compared to the test results shown in fig. 8 and 9. The simulation result is very close to the test result, which shows that the formula provided by the invention can accurately simulate the heating power correction and the temperature difference in the wall thickness direction of test plates with other thicknesses when only one thickness test plate is used for testing, thereby saving the economic cost and the time cost for manufacturing the test plates.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A method for simulating heat treatment process of equipment in different thickness processes by using a heat treatment test plate is characterized by comprising the following steps:
providing a preset heat treatment test plate, wherein at least one side of the preset heat treatment test plate is provided with a heating element and a heat preservation element in a stacking mode, the heating element is located between the preset heat treatment test plate and the heat preservation element, a welding line is arranged in the center of the preset heat treatment test plate, and the center lines of the heating element and the heat preservation element are coincident with the center line of the welding line;
carrying out a heat treatment test on the preset heat treatment test plate to obtain heat treatment parameters of the preset heat treatment test plate;
and simulating the heating power and the wall thickness temperature difference of the heat treatment test plates with different thicknesses according to the heat treatment test result of the preset heat treatment test plate.
2. The method for simulating the heat treatment process of process equipment with different thicknesses by using the heat treatment test plate as claimed in claim 1, wherein key points of the middle of the welding line, the welding line and the upper surface, the middle of the edge of the temperature-equalizing zone, and the lower surface of the edge of the temperature-equalizing zone of the heat treatment test plate are punched to be used as temperature measuring points, temperature measuring elements are placed in the key points, and temperature detection is carried out during the heat treatment test.
3. The method for simulating thermal processing of process equipment with different thicknesses according to claim 1, wherein the thermal processing parameters of the preset thermal processing test plate obtained according to the test comprise thermal processing heating power, and the convective heat transfer coefficient is calculated according to the heating power.
4. The method for simulating a thermal process of process equipment with different thicknesses according to claim 1, wherein the thermal process parameters comprise heating powers of the preset thermal process test plate in a fast heating stage, a slow heating stage and a heat preservation stage.
5. The method for simulating the heat treatment process of the process equipment with different thicknesses by the heat treatment test plate as claimed in claim 1, wherein the method for simulating the heating power of the heat treatment test plate with different thicknesses during single-sided heating comprises the following steps:
1) fast warm-up phase
The heating can be completed within 1 hour within the range of room temperature to 300 ℃, namely T is 3600s, the temperature difference Delta T is 300 ℃ to room temperature, and the heating power is as follows:
2) slow temperature rise phase
The heating power is as follows:
3) stage of heat preservation
P＝2αA(T-TW)
Wherein Q is heat, J; rho is the density of the test plate in kg/m3(ii) a c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m2；δ2M, the thickness of the heat-treated test plate to be predicted; Δ T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature. P1For convective heat transfer power, W; alpha is convection heat transfer coefficient, W/m2DEG C; t is the temperature of the test plate, DEG C; t isWIs at ambient temperature, DEG C.
6. The method for simulating the heat treatment process of the process equipment with different thicknesses by the heat treatment test plate as claimed in claim 5, wherein the following coefficients are adopted for correction when the heating power of the heat treatment test plate with different thickness is simulated:
where gamma is the correction factor, delta1To test the thickness of the heat treated test panels,δ2is the thickness of the heat-treated test plate to be simulated;
the heating power in the slow temperature rise stage is corrected as follows:
the heating power in the heat preservation stage is corrected as follows:
P＝2γαA(T-TW)。
7. the method for simulating the thermal treatment process of the process equipment with different thicknesses according to claim 5, wherein the heating powers of the upper surface and the lower surface of the rapid heating stage, the slow heating stage and the heat preservation stage during the double-sided heating are respectively half of the heating powers during the single-sided heating.
8. The method for simulating thermal processing of process equipment with different thicknesses according to claim 1, wherein the thermal processing parameters further include the thickness-wise temperature difference of the pre-set thermal processing test panel in the fast heating stage, the slow heating stage and the temperature holding stage.
9. The method for simulating the heat treatment process of the process equipment with different thicknesses on the heat treatment test plate according to claim 8, wherein the method for simulating the temperature difference in the thickness direction of the heat treatment test plate with different thicknesses during single-sided heating comprises the following steps:
1) fast warm-up phase
2) Slow temperature rise phase
3) Stage of heat preservation
10. The method for simulating thermal processing of process equipment with different thicknesses according to claim 9, wherein the thickness direction temperature difference during double-sided heating in the fast heating stage, the slow heating stage and the heat preservation stage is one quarter of the thickness direction temperature difference during single-sided heating.
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