CN114480829B - Method for simulating heat treatment process of process equipment with different thicknesses by using heat treatment test plate - Google Patents
Method for simulating heat treatment process of process equipment with different thicknesses by using 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 process equipment with different thicknesses by using a heat treatment test plate, which comprises the steps of providing a preset heat treatment test plate; performing 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 boards with different thicknesses according to the heat treatment test results of the preset heat treatment test boards. The invention provides a method for simulating local heat treatment processes of equipment with different thicknesses by using a heat treatment test plate, wherein the heat treatment test plate is used for simulating a field welding line to carry out a heat treatment test, so that a parameter curve of the heat treatment test is obtained, 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 line. The test and simulation method provided by the invention can enable the heat treatment test board with one thickness to replace a plurality of heat treatment test boards with different thicknesses, thereby reducing the heat treatment test cost.
Description
Technical Field
The invention relates to the technical field of heat treatment, in particular to a method for simulating heat treatment processes of process equipment with different thicknesses by using a heat treatment test plate.
Background
In recent decades, with the development of industrial production demands and the scientific and technical level, process equipment has gradually developed to be large-sized and highly parameterized. The large-scale equipment places higher demands on equipment manufacture, and particularly, some large-scale equipment cannot be manufactured completely in a manufacturing plant, but can be manufactured into parts at the manufacturing plant, and then assembled and welded on the site. With the enlargement of equipment, the thickness of the equipment is also larger and larger, and residual stress and hardening tendency are more easily generated after welding processing. It is particularly important to heat treat process equipment to improve mechanical properties and eliminate possible welding defects. In-situ heat treatment of large devices is the last step in device fabrication. The heat treatment is different from the welding, nondestructive testing and other processes, the post-welding heat treatment is continuously completed once, the heat treatment quality is also determined, and the heat treatment is successful if the quality meets the requirements; if the quality is not in accordance with the regulation, the heat treatment fails, the possibility of second re-entry is difficult, and the possibility of 'repairing' is not existed. If the last process fails, all of the previous work has been put into full flow, which is costly, especially for large scale equipment.
The large-scale equipment welded on site can only adopt local heat treatment, is limited by the condition of the site, and is very important how to ensure the heat treatment temperature of the welding line of the large-scale equipment. Because the wall thickness of the equipment is large, the temperature is uneven in the thickness direction, and the equipment to be used for delivery cannot be internally perforated for temperature measurement, the middle temperature of the wall thickness of the equipment is unknown, and the heat treatment is extremely risky.
The local heat treatment process is mainly divided into 5 stages, namely a rapid heating stage below ① ℃ and a rapid heating stage below ① ℃, wherein the heating can be completed within 1 hour; ② A slow temperature rise stage from 300 ℃ or higher 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; ③ A heat preservation stage, which is to maintain the heat treatment temperature for a certain time according to the heat treatment process, and at the moment, the heat treatment part is still required to be heated to ensure the heat treatment temperature; ④ In the slow cooling stage, the whole heat treatment in the furnace is generally carried out along with furnace cooling, and the local heat treatment can be carried out at a controlled speed in a heat-preserving state; ⑤ And cooling at normal temperature.
The heat treatment panels were tested mainly for the first 3 stages. In the prior art, equipment with different thicknesses has different heat treatment processes, correspondingly, different heat treatment test plates are also provided, the raw material cost of each test plate is added, and the processing, manufacturing and punching cost is added, so that huge economic cost and time cost are brought for processing the heat treatment test plates for each equipment.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a method for simulating a heat treatment process of process equipment with different thicknesses by using a heat treatment test plate.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method of heat treating a test panel to simulate a process of heat treating process equipment of different thickness, comprising:
Providing a preset heat treatment test plate, wherein at least one side of the preset heat treatment test plate is provided with a heating piece and a heat preservation piece in a lamination mode, the heating piece is positioned between the preset heat treatment test plate and the heat preservation piece, the center of the preset heat treatment test plate is provided with a welding line, and the central lines of the heating piece and the heat preservation piece are overlapped with the central line of the welding line;
Performing 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 boards with different thicknesses according to the heat treatment test results of the preset heat treatment test boards.
Preferably, holes are punched in the middle of the welding line of the heat treatment test plate, the welding line and the upper surface, the middle and the lower surface of the edge of the uniform temperature zone to serve as temperature measuring points, and temperature measuring elements are placed, so that temperature detection is performed when a heat treatment test is performed.
Preferably, the heat treatment parameters of the preset heat treatment test plate obtained according to the test comprise heat treatment heating power, and the convective heat transfer coefficient is calculated according to the heating power.
Preferably, the heat treatment parameters include heating power of the preset heat treatment test plate in a rapid heating stage, a slow heating stage and a heat preservation stage.
Preferably, the simulation method for the heating power of the heat treatment test plates with different thicknesses during single-sided heating comprises the following steps:
1) Rapid heating stage
Heating can be completed within 1 hour within the range of room temperature to 300 ℃, namely t=3600 s, the temperature difference delta T=300 ℃ to room temperature, and the heating power is as follows:
2) Slow temperature rise stage
The heating power is as follows:
3) Thermal insulation stage
P＝2αA(T-TW)
Wherein Q is heat, J; ρ is the density of the test plate, kg/m 3; c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m 2;δ2 is the thickness of the heat treatment test plate to be predicted, and m; delta T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature. P 1 is convection heat transfer power, W; alpha is the convection heat transfer coefficient, W/m 2 ℃; t is the temperature of the test plate and is at the temperature of DEG C; t W is ambient temperature, DEG C.
Preferably, because the uniform temperature zone widths of the test plates with different thicknesses are different, when the heating power of the heat treatment test plates with different thicknesses is simulated, the following coefficients are adopted for correction:
Wherein gamma is a correction coefficient, delta 1 is the thickness of the test heat treatment test plate, delta 2 is the thickness of the heat treatment test plate to be simulated;
The heating power correction at the slow temperature rise stage is as follows:
the heating power correction in the heat preservation stage is 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 half of that of single-sided heating.
Preferably, the heat treatment parameters further include thickness direction temperature differences of the preset heat treatment test plate in a rapid temperature rise stage, a slow temperature rise stage and a heat preservation stage.
Preferably, the simulation method for 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) Rapid heating stage
2) Slow temperature rise stage
3) Thermal insulation stage
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 heating end temperatures of each stage, not the process intermediate temperatures.
Compared with the prior art, the method for simulating the local heat treatment process of the equipment with different thickness by using the heat treatment test plate provided by the invention has the advantages that the heat treatment test is carried out by simulating the field welding seam by using the heat treatment test plate, so that the parameter curve of the heat treatment test is obtained, 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. The test and simulation method provided by the invention can enable the heat treatment test board with one thickness to replace a plurality of heat treatment test boards with different thicknesses, thereby reducing the heat treatment test cost.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a heat treatment panel structure;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a graph showing the temperature and time profile of the heat treatment of the embodiment;
FIG. 4 is a graph of simulated heating power of different thickness plaques in a 120mm thick plaque heat treatment test;
FIG. 5 is a graph showing the temperature difference in the thickness direction of the wall of a test panel of different thickness simulated by a 120mm thick test panel heat treatment test;
FIG. 6 is a graph of simulated heating power of different thickness panels in a 94mm thick panel heat treatment test;
FIG. 7 is a graph of the temperature difference in the thickness direction of the walls of different thickness panels simulated by a 94mm thick panel heat treatment test;
FIG. 8 is a graph of simulated heating power of different thickness panels in a 62mm thick panel heat treatment test;
FIG. 9 is a graph of the temperature difference in the thickness direction of the walls of different thickness panels simulated by a62 mm thick panel heat treatment test.
Reference numerals: h k -weld width; HB-heating band width; GCB-insulating tape width; SB-width of the soaking zone; delta 0 -thickness of heat preservation layer; delta 1 -panel thickness; l-test panel length; w is the width of the test plate, and 1 is the 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 present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
A method for simulating a thermal process of process equipment of different thickness by a thermal test panel, comprising the steps of:
First) Heat treatment test
Taking the heat treatment of the double sides of a Q345R heat treatment test plate with the thickness of 120mm as an example, heating plates and heat preservation layers are sequentially laid on two sides of a welding seam, and the widths of the heating plates and the heat preservation layers are the same as the width of the heat treatment test plate and are 500mm. The length of the heating plate is 300mm, the length of the heat preservation layer is 800mm, and the length of the test plate is 2000mm. Punching holes at key points such as the middle of a welding line of a heat treatment test plate, the welding line, the upper surface of the edge of a uniform temperature zone, the middle, the lower surface and the like to serve as temperature measuring points, placing a thermocouple of a temperature measuring element, detecting the temperature of the key points when a heat treatment test is carried out, specifically referring to fig. 1, arranging a thermocouple temperature measuring point 1 at 9 positions in fig. 1, and detecting the temperature when the heat treatment test is carried out;
According to the heat treatment process, a heat treatment test is carried out, Q345R belongs to a Fe-1 material, the lowest heat treatment temperature is 600 ℃, heating is carried out according to the heat treatment process by adopting different heating rates, heating can be completed in a stage of 20-300 ℃, heating rate of 5500/delta is needed to be adopted for heating according to GB/T30583-2014 within a range of 300-600 ℃, delta is the thickness of a container, 120mm is taken, and the heating rate of 45 ℃/h is calculated; however, in GB/T30583-2014, the heating rate cannot be lower than 55 ℃/h, if no harmful effect is produced, the heating and cooling speeds can be reduced, and the heating rate of the section is 45 ℃/h by combining the two requirements, and the section needs 6.6h. The heat preservation time is as follows 100=2.7 H, where δ PWTH is the post-weld heat treatment thickness. The final determined localized heat treatment process for the isopachous weld is shown in Table 1, with a total heat treatment time of 10.3 hours (excluding cool down time).
Table 1 rectangular heat treatment test plate local heat treatment process
And obtaining a time-dependent change curve of the heating power of each stage and the temperature of each key point through a heat treatment test.
Performing a heat treatment test, and adjusting heat treatment heating power according to the measured temperature to finally obtain proper heating power; the heat treatment temperature of the test procedure was recorded, and a temperature change curve of the heat treatment panel was obtained as shown in fig. 2. And (3) formulating a heat treatment process of the process equipment 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.
Two) calculating heat transfer coefficients of different stages according to heating power
Heat required by temperature rise of test plate
Q＝ρ·c·A·δ1·ΔT (1)
Wherein Q is heat, J; ρ is the density of the test plate, kg/m 3; c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m 2;δ1 is the thickness of the test heat treatment test plate, and m; delta T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature.
The heat convection power of the test plate and the air can be expressed as 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 the heat convection of the heat preservation layer and the air in the process of heating the test plate by the heater, the energy losses are all included in the heat convection for the convenience of calculation.
P1＝2αA(T-TW) (2)
Wherein P 1 is convection heat transfer power, W; alpha is the convection heat transfer coefficient, W/m 2 ℃; t is the temperature of the test plate and is at the temperature of DEG C; t W is ambient temperature, DEG C.
1) Rapid heating stage
Heating can be accomplished in 1 hour in the range of room temperature to 300 ℃, i.e., t=3600 s, Δt=280 ℃ (assuming room temperature is 20 ℃).
The heating power is as follows:
let equation (3) equal to the measured power at this stage, alpha can be calculated.
The method comprises the following steps:
2) Slow temperature rise stage
The slow heating is adopted within the temperature range of 300-final heat treatment, and the heating rate is as follows according to GB/T30583-2014:
wherein dT is the rate of temperature rise, DEG C/s; delta 2 is the thickness of the test panel to be simulated, m;
temperature difference Δt=t-300; t is the heating temperature.
The heating time obtained is:
the heating power is as follows:
Let equation (6) equal to the measured power at this stage, alpha can be calculated.
The method comprises the following steps:
3) Thermal insulation stage
The heating power in the heat preservation stage is to balance the heat dissipation of the test board to the surrounding, i.e. the heat convection between the test board and the air is P 1, and the stage P is equal to the stage P 1, so that:
P＝2αA(T-TW) (9)
The method comprises the following steps:
α＝P/2A(T-TW) (10)
Let equation (7) equal to the measured power at this stage, alpha can be calculated.
Third) simulation of other thickness heat treatment panels
The time required for the heat treatment process of the heat treatment 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 according to the test plates. According to the calculated convection heat transfer coefficient and physical performance parameters of the material, the following method is adopted to determine the heat treatment heating power and the thickness direction temperature difference of the test plates with different thicknesses, so that one thickness test plate can replace multiple thickness test plates.
I) determination of heating power
Heat required by temperature rise of test plate
Q＝ρ·c·A·δ2·ΔT (11)
Wherein Q is heat, J; ρ is the density of the test plate, kg/m 3; c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m 2;δ2 is the thickness of the heat treatment test plate to be simulated, and m; delta T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature.
The heat convection power of the test plate and the air can be expressed as 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 the heat convection of the heat preservation layer and the air in the process of heating the test plate by the heater, the energy losses are all included in the heat convection for the convenience of calculation.
P1＝2αA(T-TW) (2)
Wherein P 1 is convection heat transfer power, W; alpha is the convection heat transfer coefficient, W/m 2 ℃; t is the temperature of the test plate and is at the temperature of DEG C; t W is ambient temperature, DEG C.
1) Rapid heating stage
Heating can be accomplished in 1 hour in the range of room temperature to 300 ℃, i.e., t=3600 s, Δt=280 ℃ (assuming room temperature is 20 ℃).
The heating power is as follows:
Because the heat dissipation (P 1) parts of the test boards with different thicknesses are basically the same, and the density ρ, the specific heat c and the area A of the boards with different thicknesses are the same, the difference of the heating power mainly depends on the thickness, and the heating power is larger when the thickness is larger.
2) Slow temperature rise stage
The slow heating is adopted within the temperature range of 300-final heat treatment, and the heating rate is as follows according to GB/T30583-2014:
wherein dT is the rate of temperature rise, DEG C/s; delta 2 is the thickness of the test panel to be simulated, m;
temperature difference Δt=t-300; t is the heating temperature.
The heating time obtained is:
the heating power is as follows:
Because the heat dissipation (P 1) parts of the test boards with different thicknesses are basically the same, and the density ρ, specific heat c and area A of the boards with different thicknesses are the same, the heating power in the slow temperature rise stage is irrelevant to the thickness of the test boards.
3) Thermal insulation stage
The heating power in the heat preservation stage is used for balancing the heat dissipation of the test plate to the surrounding, namely P 1, and the expression form is shown in a formula (2).
P＝2αA(T-TW) (2)
The temperature 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 the test plate is increased, the width of the welding seam is correspondingly increased, the size of the temperature equalizing zone is required to be increased, and the heating power is required to be increased in order to ensure that the wider temperature equalizing zone meets the heat treatment temperature requirement; conversely, the heating power needs to be reduced. Although the heating power required for 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 temperature equalization zone reaches the heat treatment temperature requirement. Therefore, the correction is carried out according to the weld groove, and when the thickness of the weld is large, 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 γ is the correction factor, δ 1 is the test heat treatment panel thickness, and δ 2 is the heat treatment panel thickness to be simulated.
Therefore, the heating power in the slow temperature rise stage is corrected as follows:
the heating power correction in the heat preservation stage is as follows:
P＝2γαA(T-TW) (18)
II) determination of the temperature difference
The temperature difference in the wall thickness direction is obtained according to a heat conduction formula:
Wherein T δ is the temperature difference in the wall thickness direction, DEG C; p is power, W; a is the heat transfer area, m 2; lambda is the heat conduction coefficient, W/mdeg.C; δ 2 is the thickness in the heat conduction direction of the test plate to be simulated, m, and is equal to the plate thickness when one side is heated.
If P should be half of the total heating power and A should be 2 times of the total heat transfer area, equation (8) should be
1) Rapid heating stage
The temperature difference in the wall thickness direction is in direct proportion to the square of the wall thickness, and when double-sided heating is adopted, the thickness in the heat conduction direction is half that of single-sided heating, and the heating power of each side is half that of the original, namely:
2) Slow temperature rise stage
The temperature difference in the wall thickness direction in the slow temperature rise stage is proportional to the thickness in the heat conduction direction, namely the plate thickness, and the power is halved due to halving the plate thickness in the double-sided heating, and the temperature difference is one fourth of that in the single-sided heating.
3) Thermal insulation stage
The temperature difference in the wall thickness direction in the heat preservation stage is also proportional 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 thickness direction in the heat-insulating stage is also proportional to the plate thickness, and therefore, the temperature difference in the thickness direction in the double-sided heating is one fourth of that in the single-sided heating.
Fourth) simulation of process plant heat treatment parameters
In this embodiment, the heat flux density of each heat treatment stage is calculated using the following formula:
Wherein t is the heat transfer time.
The heat treatment heating power of a process device may be modeled based on the heat flux density and the heating area of the corresponding process device.
It should be noted that the temperatures given in the present invention are the heating end temperatures of each stage, not the process intermediate temperatures.
Example 1
The test was performed using a 120mm thick heat treatment panel, the convective heat transfer coefficient was calculated, and the simulation was performed on panels of other thickness.
Table 2 comparison of physical properties of heat-treated test panels of q345r material
TABLE 3 simulation of heating power and temperature difference of heat treatment panels with different thicknesses
Example 2 of the embodiment
The test was performed using a 94mm heat treatment panel, the convective heat transfer coefficient was calculated, and the simulation was performed on panels of other thicknesses.
TABLE 4 simulation of heating power and temperature difference of heat treatment panels with different thicknesses
Example 3
The test was performed using a 62mm heat treatment panel, the convective heat transfer coefficient was calculated, and the simulation was performed on panels of other thickness.
TABLE 5 simulation of heating power and temperature difference of heat treatment panels with different thicknesses
The test is carried out by adopting a Q345R test plate with the thickness of 120mm, so that the heating power simulation and the temperature difference simulation are carried out on the heat treatment test plates with other thicknesses, and the comparison between the test results is shown in fig. 4 and 5; the test is carried out by adopting a Q345R test plate with the thickness of 94mm, so that the heating power simulation and the temperature difference simulation are carried out on the heat treatment test plates with other thicknesses, and the comparison between the test results is shown in fig. 6 and 7; the test was performed using a 62mm thick Q345R test plate to simulate heating power and compare the temperature difference with the test results for other thickness heat treatment test plates, see fig. 8 and 9. The simulation result is very similar to the test result, and the formula provided by the invention shows that when only one thickness test plate is adopted for test, the heating power correction and the wall thickness direction temperature difference of other thickness test plates can be accurately simulated, so that the economic cost and the time cost for manufacturing the test plates are saved.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (4)
1. A method of simulating a thermal process of a process plant of varying thickness for a thermal test panel, comprising:
Providing a preset heat treatment test plate, wherein at least one side of the preset heat treatment test plate is provided with a heating piece and a heat preservation piece in a lamination mode, the heating piece is positioned between the preset heat treatment test plate and the heat preservation piece, the center of the preset heat treatment test plate is provided with a welding line, and the central lines of the heating piece and the heat preservation piece are overlapped with the central line of the welding line;
Performing a heat treatment test on the preset heat treatment test plate to obtain heat treatment parameters of the preset heat treatment test plate;
The heat treatment parameters comprise heating power and thickness direction temperature difference of the preset heat treatment test plate in a rapid heating stage, a slow heating stage and a heat preservation stage;
Simulating heating power and wall thickness temperature differences of the heat treatment test plates with different thicknesses according to heat treatment test results of the preset heat treatment test plates;
when single-sided heating is performed, the simulation method for the heating power of the heat treatment test plates with different thicknesses comprises the following steps:
1) Rapid heating stage
Heating can be completed within 1 hour within the range of room temperature to 300 ℃, namely t=3600 s, the temperature difference delta T=300 ℃ to room temperature, and the heating power is as follows:
2) Slow temperature rise stage
The heating power is as follows:
3) Thermal insulation stage
P＝2αA(T-TW)
Wherein ρ is the density of the test plate, kg/m 3; c is the specific heat of the test plate material, J/kg ℃; a is the heating area, m 2;δ2 is the thickness of the heat treatment test plate to be predicted, and m; delta T is the temperature difference, i.e., the difference between the heating temperature and the initial temperature; alpha is the convection heat transfer coefficient, W/m 2 ℃; t is the temperature of the test plate and is at the temperature of DEG C; t W is the ambient temperature, DEG C;
the simulation method for 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) Rapid heating stage
Wherein lambda is the heat conduction coefficient, W/m ℃;
2) Slow temperature rise stage
3) Thermal insulation stage
When the heating power of the heat treatment test plates with different thicknesses is simulated, the following coefficients are adopted for correction:
Wherein gamma is a correction coefficient, delta 1 is the thickness of the test heat treatment test plate, delta 2 is the thickness of the heat treatment test plate to be predicted;
The heating power correction at the slow temperature rise stage is as follows:
the heating power correction in the heat preservation stage is as follows:
P＝2γαA(T-TW)。
2. The method for simulating the heat treatment process of process equipment with different thicknesses by using the heat treatment test plate according to claim 1, wherein key points of the middle of the welding line of the heat treatment test plate, the welding line and the upper surface, the middle and the lower surface of the edge of the temperature equalizing zone are punched to be used as temperature measuring points, and temperature measuring elements are placed, and temperature detection is carried out when the heat treatment test is carried out.
3. The method for simulating the heat treatment process of process equipment with different thicknesses by using the heat treatment test plate according to claim 1, wherein 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 half of that of the single-sided heating during double-sided heating.
4. The method for simulating thermal processing of process equipment with different thickness by using a thermal processing test plate according to claim 1, wherein the temperature difference in the thickness direction during double-sided heating in the rapid heating stage, the slow heating stage and the heat-preserving stage is one fourth of the temperature difference in the thickness direction during single-sided heating.
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