Heat treatment control method, device and equipment for hardening and tempering production line

Abstract

The invention discloses a heat treatment control method, device and equipment for a hardening and tempering production line, and the method comprises the steps: obtaining the size of a steel plate, the steel plate comprises a first steel plate section and a second steel plate section adjacent to the first steel plate section, the first steel plate section is an equal-thickness steel plate, and the second steel plate section is a variable-thickness steel plate; the first-section steel plate is thicker than the second-section steel plate, and the moment when the first-section steel plate enters the hardening and tempering production line is earlier than the moment when the second-section steel plate enters the hardening and tempering production line; determining quenching heating parameters based on the size and the steel type of the steel plate; determining quenching water cooling parameters based on the size and the steel type of the steel plate; determining tempering heating parameters based on the size and the steel type of the steel plate; and based on the quenching heating parameters, the quenching water-cooling parameters and the tempering heating parameters, the quenching and tempering production line is controlled to conduct heat treatment on the steel plate. The technical problem that the plate shape stability of the steel plate is low is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel plate tempering, and in particular relates to a heat treatment control method, device and equipment for a tempering production line. Background Art

[0002] During the heat treatment of steel plates in the quenching and tempering production line, the problem of unstable plate shape may occur. Especially for hot-rolled longitudinal variable thickness steel plates, since the thickness of hot-rolled longitudinal variable thickness steel plates at different positions is different, the process parameters are more difficult to control, and the problem of unstable plate shape is more serious.

[0003] Since the shape of the steel plate is unstable, the product qualification rate will be reduced, resulting in increased enterprise costs. Therefore, the low shape stability of the steel plate is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide a heat treatment control method, device and equipment for a quenching and tempering production line, which solve the technical problem of low shape stability of steel plates.

[0005] In a first aspect, an embodiment of the present invention provides a heat treatment control method for a quenching and tempering production line, comprising: obtaining the size of a steel plate, the steel plate comprising a first section of steel plate and a second section of steel plate adjacent to the first section of steel plate, the first section of steel plate being a steel plate of uniform thickness, the second section of steel plate being a steel plate of variable thickness, the thickness of the first section of steel plate being greater than the thickness of the second section of steel plate, and the time when the first section of steel plate enters the quenching and tempering production line is earlier than the time when the second section of steel plate enters the quenching and tempering production line; determining quenching and heating parameters based on the size and steel type of the steel plate; determining quenching and water cooling parameters based on the size and steel type of the steel plate; determining tempering and heating parameters based on the size and steel type of the steel plate; and controlling the quenching and tempering production line to perform heat treatment on the steel plate based on the quenching and heating parameters, the quenching and water cooling parameters and the tempering heating parameters.

[0006] In combination with the first aspect of the present invention, in some embodiments, the tempering production line includes a heating furnace; the quenching and heating parameters are determined based on the size and steel type of the steel plate, including: taking the product of the thickness of the first section of the steel plate and the preset quenching heating coefficient as the quenching heating time of the heating furnace; taking the product of the thickness of the first section of the steel plate and the preset quenching and insulation coefficient as the quenching and insulation time of the heating furnace; based on the steel type of the steel plate, determining the quenching heating temperature of the heating furnace; wherein the quenching heating parameters include the quenching heating time, the quenching and insulation time and the quenching heating temperature, and the size of the steel plate includes the thickness of the first section of the steel plate.

[0007] In combination with the first aspect of the present invention, in some embodiments, the thickness of the first section of the steel plate is 18 mm, the steel grade of the steel plate is Q690, the quenching heating time is 32 min, the quenching holding time is 20 min, and the quenching heating temperature is 900 °C.

[0008] In combination with the first aspect of the present invention, in some embodiments, the quenching and tempering production line includes a quenching machine; determining the quenching water cooling parameters based on the size and steel grade of the steel plate includes: determining the water volume of the quenching machine, the initial value of the roller speed of the roller table of the quenching machine, and the frame height of the quenching machine based on the thickness and steel grade of the first section of the steel plate; determining the running acceleration of the roller table of the quenching machine based on the length of the steel plate, wherein the greater the length of the steel plate, the smaller the running acceleration of the roller table of the quenching machine; the size of the steel plate includes the length of the steel plate and the thickness of the first section of the steel plate.

[0009] In combination with the first aspect of the present invention, in some embodiments, determining the tempering heating parameters based on the size and steel grade of the steel plate includes: taking the product of the thickness of the first section of the steel plate and a preset tempering heating coefficient as the tempering heating time of the heating furnace; taking the product of the thickness of the first section of the steel plate and a preset tempering holding coefficient as the tempering holding time of the heating furnace; determining the tempering heating temperature of the heating furnace based on the steel grade of the steel plate; wherein the tempering heating parameters include the tempering heating time, the tempering holding time, and the tempering heating temperature.

[0010] In combination with the first aspect of the present invention, in some embodiments, the thickness of the first section of the steel plate is 18 mm, the steel grade of the steel plate is Q690, the tempering heating time is 58 min, the tempering holding time is 30 min, and the tempering heating temperature is 650 °C.

[0011] In combination with the first aspect of the present invention, in some embodiments, the quenching and tempering production line includes a heating furnace and a quenching machine; controlling the quenching and tempering production line to heat-treat the steel plate based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters includes: controlling the heating furnace to perform quenching heating on the steel plate based on the quenching heating parameters; controlling the quenching machine to perform quenching water cooling on the steel plate based on the quenching water cooling parameters; controlling the heating furnace to perform tempering heating on the steel plate based on the tempering heating parameters.

[0012] In combination with the first aspect of the present invention, in some embodiments, the steel plate is a hot-rolled longitudinally variable-thickness steel plate, and the length of the first section of the steel plate is greater than or equal to 2 times the length of the second section of the steel plate.

[0013] In a second aspect, an embodiment of the present invention provides a heat treatment control device for a quenching and tempering production line, including: a size acquisition unit configured to acquire the size of a steel plate, where the steel plate includes a first-section steel plate and a second-section steel plate adjacent to the first-section steel plate, the first-section steel plate is a steel plate with a constant thickness, the second-section steel plate is a steel plate with a variable thickness, the thickness of the first-section steel plate is greater than that of the second-section steel plate, and the time when the first-section steel plate enters the quenching and tempering production line is earlier than the time when the second-section steel plate enters the quenching and tempering production line; a parameter determination unit configured to determine quenching heating parameters based on the size and steel type of the steel plate; determine quenching water cooling parameters based on the size and steel type of the steel plate; determine tempering heating parameters based on the size and steel type of the steel plate; and a heat treatment unit configured to control the quenching and tempering production line to perform heat treatment on the steel plate based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the computer program, the method described in any item of the first aspect is implemented.

[0015] One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

[0016] In the embodiment of the present invention, by acquiring the size of the steel plate, the steel plate includes a first-section steel plate and a second-section steel plate adjacent to the first-section steel plate, the first-section steel plate is a steel plate with a constant thickness, the second-section steel plate is a steel plate with a variable thickness, the thickness of the first-section steel plate is greater than that of the second-section steel plate, and the time when the first-section steel plate enters the quenching and tempering production line is earlier than the time when the second-section steel plate enters the quenching and tempering production line; determining quenching heating parameters based on the size and steel type of the steel plate; determining quenching water cooling parameters based on the size and steel type of the steel plate; determining tempering heating parameters based on the size and steel type of the steel plate; and controlling the quenching and tempering production line to perform heat treatment on the steel plate based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters. Since the first-section steel plate is a steel plate with a constant thickness, its heat treatment process is easier to control, and the first-section steel plate is more likely to achieve stable plate shape. When the first-section steel plate maintains a stable plate shape, since the first-section steel plate is adjacent to the second-section steel plate, the first-section steel plate can play a role in restraining the second-section steel plate, avoiding excessive deformation of the second-section steel plate, and improving the plate shape stability of the second-section steel plate. Therefore, the beneficial effect of improving the plate shape stability of the steel plate is at least achieved to a certain extent. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0018] Figure 1 It is a flowchart of the heat treatment control method for the tempering production line in the embodiments of the present invention;

[0019] Figure 2 It is a schematic diagram of the steel plate in the embodiments of the present invention;

[0020] Figure 3 It is a functional module diagram of the heat treatment control device for the tempering production line in the embodiments of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the electronic device in the embodiments of the present invention. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] In the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The embodiments of the present invention provide a heat treatment control method for a tempering production line. Referring to Figure 1 as shown, the method includes the following steps S101 to S103:

[0025] S101: Obtain the dimensions of the steel plate. The steel plate includes a first section of steel plate and a second section of steel plate adjacent to the first section. The first section of steel plate is a steel plate with a uniform thickness, and the second section of steel plate is a steel plate with a variable thickness. The thickness of the first section of steel plate is greater than the thickness of the second section of steel plate. The first section of steel plate enters the tempering production line earlier than the second section of steel plate enters the tempering production line.

[0026] It should be noted that the equal-thickness steel plate means that the thickness is the same at different positions of the steel plate, and the variable-thickness steel plate means that the thickness is different at different positions of the steel plate.

[0027] In some embodiments, at positions in the second-section steel plate that are farther away from the first-section steel plate, the thickness is smaller. Refer to Figure 2 as shown in Figure 2 is a schematic diagram of the steel plate in the embodiment of the present invention; wherein, L1 is the length of the first-section steel plate, H1 is the thickness of the first-section steel plate, L2 is the length of the second-section steel plate, and H2 is the minimum thickness of the second-section steel plate.

[0028] S102: Determine the quenching heating parameters based on the size and steel type of the steel plate; determine the quenching water-cooling parameters based on the size and steel type of the steel plate; determine the tempering heating parameters based on the size and steel type of the steel plate.

[0029] In some embodiments, the quenching and tempering production line includes a heating furnace; determining the quenching heating parameters based on the size and steel type of the steel plate may include: taking the product of the thickness of the first-section steel plate and the preset quenching heating coefficient as the quenching heating time of the heating furnace; taking the product of the thickness of the first-section steel plate and the preset quenching holding coefficient as the quenching holding time of the heating furnace; determining the quenching heating temperature of the heating furnace based on the steel type of the steel plate; wherein, the quenching heating parameters include the quenching heating time, the quenching holding time, and the quenching heating temperature, and the size of the steel plate includes the thickness of the first-section steel plate.

[0030] It should be noted that it is also possible to determine the quenching heating time and the quenching holding time according to the thickness of the second-section steel plate, but there will be some problems, such as poor mechanical properties of the steel plate due to low temperature uniformity inside and outside the steel plate. Specifically, during the heating process of the steel plate, heat is transferred from the outside of the steel plate to the inside. The quenching heating time may just make the temperature inside and outside the second-section steel plate uniform, but due to the greater thickness of the first-section steel plate, the heat transfer time is longer. At this time, the temperature deviation inside and outside the first-section steel plate is large, resulting in poor mechanical properties of the first-section steel plate. Therefore, in the embodiment of the present invention, it is defined to determine the quenching heating time and the quenching holding time according to the thickness of the first-section steel plate to improve the temperature uniformity inside and outside the first-section steel plate and the second-section steel plate, ensure the uniformity of the internal tissue structure of the first-section steel plate and the second-section steel plate, and thus improve the mechanical properties of the steel plate. Therefore, the shape stability of the steel plate is improved.

[0031] In some embodiments, the greater the yield strength of the steel grade of the steel plate, the higher the quenching heating temperature of the heating furnace. It should be noted that the greater the yield strength of the steel grade of the steel plate, the less likely the internal microstructure of the steel plate is to deform. Therefore, a higher temperature is required to heat the steel plate so as to change the internal microstructure of the steel plate, thereby improving the uniformity of the internal microstructure of the steel plate and also improving the mechanical properties of the steel plate. Therefore, the shape stability of the steel plate is improved.

[0032] In some embodiments, the thickness of the first-stage steel plate is 18 mm, the steel grade of the steel plate is Q690, the quenching heating time is 32 min, the quenching holding time is 20 min, and the quenching heating temperature is 900 °C. It should be noted that when the thickness of the first-stage steel plate is 18 mm and the steel grade of the steel plate is Q690, through continuous improvement of the process parameters, the above-mentioned quenching heating time, quenching holding time, and quenching heating temperature are finally determined, which can avoid warping and other abnormal deformations of the steel plate, thereby improving the shape stability of the steel plate.

[0033] In some embodiments, the quenching and tempering production line includes a quenching machine; based on the size and steel grade of the steel plate, determining the quenching water cooling parameters may include: based on the thickness and steel grade of the first-stage steel plate, determining the water volume of the quenching machine, the initial value of the roller speed of the roller table of the quenching machine, and the frame height of the quenching machine; based on the length of the steel plate, determining the running acceleration of the roller table of the quenching machine, wherein the greater the length of the steel plate, the smaller the running acceleration of the roller table of the quenching machine; the size of the steel plate includes the length of the steel plate and the thickness of the first-stage steel plate.

[0034] It should be noted that from the first-stage steel plate to the second-stage steel plate, the thickness of the steel plate gradually decreases. Also, since the smaller the thickness of the steel plate, the smaller the water volume required at that position, it is necessary to set the running acceleration of the roller table to gradually increase the roller speed. Therefore, it is ensured that the water volume at the position of the steel plate with a smaller thickness is smaller, thereby ensuring the uniformity of the temperature drop at different positions of the steel plate, and further improving the mechanical properties of the steel plate. In addition, the greater the length of the steel plate, the smaller the running acceleration of the roller table of the quenching machine, which can avoid the problem that the temperature drop at the end of the steel plate is too small due to the too high roller speed of the roller table when water cooling the end of the steel plate, thereby ensuring the uniformity of the temperature drop of the steel plate and further improving the mechanical properties of the steel plate.

[0035] It should be noted that the frame height of the quenching machine refers to the distance between the upper nozzle above the roller table of the quenching machine and the lower nozzle below the roller table.

[0036] In some embodiments, determining the tempering heating parameters based on the size and steel grade of the steel plate may include: taking the product of the thickness of the first-stage steel plate and a preset tempering heating coefficient as the tempering heating time of the heating furnace; taking the product of the thickness of the first-stage steel plate and a preset tempering holding coefficient as the tempering holding time of the heating furnace; determining the tempering heating temperature of the heating furnace based on the steel grade of the steel plate; wherein the tempering heating parameters include the tempering heating time, the tempering holding time, and the tempering heating temperature.

[0037] In some embodiments, the thickness of the first-stage steel plate is 18 mm, the steel grade of the steel plate is Q690, the tempering heating time is 58 min, the tempering holding time is 30 min, and the tempering heating temperature is 650 °C. It should be noted that in the case where the thickness of the first-stage steel plate is 18 mm and the steel grade of the steel plate is Q690, through continuous improvement of the process parameters, the above-mentioned tempering heating time, tempering holding time, and tempering heating temperature are finally determined, which can avoid warping and other abnormal deformations of the steel plate, thereby improving the shape stability of the steel plate.

[0038] S103: Control the heat treatment of the steel plate by the conditioning production line based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters.

[0039] In some embodiments, the conditioning production line includes a heating furnace and a quenching machine; controlling the heat treatment of the steel plate by the conditioning production line based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters includes: controlling the heating furnace to perform quenching heating on the steel plate based on the quenching heating parameters; controlling the quenching machine to perform quenching water cooling on the steel plate based on the quenching water cooling parameters; controlling the heating furnace to perform tempering heating on the steel plate based on the tempering heating parameters.

[0040] In some embodiments, the steel plate is a hot-rolled longitudinally variable-thickness steel plate, and the length of the first-stage steel plate is greater than or equal to 2 times the length of the second-stage steel plate.

[0041] During the heat treatment of the steel plate by the conditioning production line, problems of unstable plate shape may occur. Especially for hot-rolled longitudinally variable-thickness steel plates, since the thicknesses at different positions of the hot-rolled longitudinally variable-thickness steel plates are different, the process parameters are more difficult to control, and the problem of unstable plate shape is more serious. Therefore, the embodiments of the present invention are particularly applicable to hot-rolled longitudinally variable-thickness steel plates. In addition, since the length of the first-stage steel plate is greater than or equal to 2 times the length of the second-stage steel plate, the first-stage steel plate can further exert a constraining effect on the second-stage steel plate, avoid excessive deformation of the second-stage steel plate, and improve the shape stability of the second-stage steel plate. Therefore, the beneficial effect of improving the shape stability of the steel plate is achieved at least to a certain extent.

[0042] It should be noted that medium - thick plates generally have ordinary physical properties, that is, the thickness of the whole plate is consistent. With the user's equipment weight reduction, weld reduction and other usage requirements put forward, longitudinally variable - thickness LP steel plates have been developed. For traditional heat - treated equal - thickness steel plate quenching shape control methods, stable shape control can be achieved by adjusting quenching parameters such as water volume, roll speed, and frame height. For longitudinally variable - thickness LP steel plate quenching shape, only adjusting quenching parameters cannot meet the needs of shape control. Therefore, the embodiments of the present invention provide a full - process solution from feeding to quenching production. The purpose of the embodiments of the present invention is to provide a full - process solution for the shape of Q690 - grade longitudinally variable - thickness LP steel plates during heat - treatment quenching (quenching + tempering), including control methods for raw material standards, quenching heating, quenching parameter setting, tempering, etc. of longitudinally variable - thickness steel plates, so as to achieve that the shape flatness of Q690 - grade longitudinally variable - thickness steel plates after quenching and tempering is within 8mm / 2m.

[0043] It should be noted that the raw material control standard before LP steel plate quenching and tempering can be that a part of the equal - thickness steel plate is reserved on the variable - thickness steel plate according to the maximum thickness, and the equal - thickness length is greater than or equal to 2 times the variable - thickness length. During quenching heating, when the steel plate enters the furnace, the equal - thickness part of the steel plate faces the furnace inlet end, that is, to ensure that the equal - thickness part enters the furnace and the quenching machine first; the steel plate heating process controls the heating parameters according to the maximum thickness. For the control of quenching water - cooling parameters, the water volume, quenching roll speed, and frame height are set according to the maximum - thickness parameters, and at the same time, the quenching roll speed is set at 0 - 0.01m / s according to the actual length of the steel plate. 2 Acceleration, meeting the requirements of the variable - thickness part for quenching roll speed control. For tempering control, the tempering heating process parameters can be set according to the maximum thickness.

[0044] The process parameters of the embodiments of the present invention are illustrated as follows: Refer to Figure 2 As shown, the length L2 of the second - stage steel plate is 2800mm, the width of the second - stage steel plate is 2400mm, H2 = 12mm, H1 = 18mm, and the size of the incoming steel plate during heat - treatment production is as shown in the schematic Figure 2 control. The raw material control standard before LP steel plate quenching and tempering: The steel plate retains an equal - thickness part with H1 = 18mm on the variable - thickness steel plate, the variable - thickness length L2 = 2800mm, and the equal - thickness length L1 = 6000mm. The total length of the actual production steel plate = L1 + L2 = 8800mm. During quenching heating, when the steel plate enters the furnace, the equal - thickness part faces the furnace inlet end, as shown in the schematic Figure 2 shown. The steel plate quenching heating process controls the heating parameters according to 18mm, the quenching heating temperature is 900°C, and the holding time is 20min. For the control of quenching water - cooling parameters, the quenching parameters set the water - volume parameters according to 18mm steel plates, and at the same time, set 0.005m / s 2Acceleration. The specific water-cooling parameters are shown in Table 1 below. For tempering control, the above-mentioned steel plates are tempered in the furnace in the same direction. The tempering process parameters are controlled at 650 °C for 30 min according to the 18 mm specification. After tempering, the variable-thickness part can be cut according to customer requirements.

[0045] Table 1:

[0046]

[0047] It should be noted that the embodiment of the present invention provides a full-process shape solution and control method for a Q690-level longitudinally variable-thickness high-strength steel plate during heat treatment quenching and tempering, realizing the first-pass qualification of the shape after heat treatment quenching and tempering, avoiding the secondary cold straightening rescue of the steel plate, improving the production efficiency of the variable-thickness steel plate, and reducing the production cost. The embodiment of the present invention effectively avoids problems such as equipment shutdown caused by shape problems during the production of longitudinally variable-thickness steel plates, and realizes the continuous and stable production of longitudinally variable-thickness steel plates on the heat treatment production line.

[0048] The embodiment of the present invention obtains the size of the steel plate. The steel plate includes a first-section steel plate and a second-section steel plate adjacent to the first-section steel plate. The first-section steel plate is a steel plate with a uniform thickness, and the second-section steel plate is a steel plate with a variable thickness. The thickness of the first-section steel plate is greater than that of the second-section steel plate. The time when the first-section steel plate enters the quenching and tempering production line is earlier than the time when the second-section steel plate enters the quenching and tempering production line; based on the size and steel grade of the steel plate, the quenching heating parameters are determined; based on the size and steel grade of the steel plate, the quenching water-cooling parameters are determined; based on the size and steel grade of the steel plate, the tempering heating parameters are determined; based on the quenching heating parameters, the quenching water-cooling parameters, and the tempering heating parameters, the quenching and tempering production line is controlled to perform heat treatment on the steel plate. Since the first-section steel plate is a steel plate with a uniform thickness, its heat treatment process is easier to control, and the shape of the first-section steel plate is easier to stabilize. When the shape of the first-section steel plate is stable, since the first-section steel plate is adjacent to the second-section steel plate, the first-section steel plate can play a restraining role on the second-section steel plate, avoiding excessive deformation of the second-section steel plate and improving the shape stability of the second-section steel plate. Therefore, at least to a certain extent, the beneficial effect of improving the shape stability of the steel plate is achieved.

[0049] Based on the same inventive concept, refer to Figure 3As shown in the figure, an embodiment of the present invention provides a heat treatment control device 10 for a quenching and tempering production line, including: a size acquisition unit 110 for acquiring the size of a steel plate, the steel plate including a first-section steel plate and a second-section steel plate adjacent to the first-section steel plate, the first-section steel plate being a steel plate with a uniform thickness, the second-section steel plate being a steel plate with a variable thickness, the thickness of the first-section steel plate being greater than that of the second-section steel plate, and the time when the first-section steel plate enters the quenching and tempering production line being earlier than the time when the second-section steel plate enters the quenching and tempering production line; a parameter determination unit 120 for determining quenching heating parameters based on the size and steel type of the steel plate; determining quenching water cooling parameters based on the size and steel type of the steel plate; determining tempering heating parameters based on the size and steel type of the steel plate; and a heat treatment unit 130 for controlling the heat treatment of the steel plate by the quenching and tempering production line based on the quenching heating parameters, quenching water cooling parameters, and tempering heating parameters.

[0050] It can be understood that the quenching and tempering production line includes a heating furnace; the parameter determination unit 120 includes: a first parameter determination subunit for taking the product of the thickness of the first-section steel plate and a preset quenching heating coefficient as the quenching heating time of the heating furnace; taking the product of the thickness of the first-section steel plate and a preset quenching holding coefficient as the quenching holding time of the heating furnace; and determining the quenching heating temperature of the heating furnace based on the steel type of the steel plate. Among them, the quenching heating parameters include quenching heating time, quenching holding time, and quenching heating temperature, and the size of the steel plate includes the thickness of the first-section steel plate. Among them, the thickness of the first-section steel plate is 18 mm, the steel type of the steel plate is Q690, the quenching heating time is 32 min, the quenching holding time is 20 min, and the quenching heating temperature is 900 °C.

[0051] It can be understood that the quenching and tempering production line includes a quenching machine; the parameter determination unit 120 includes: a second parameter determination subunit for determining the water volume of the quenching machine, the initial value of the roller speed of the roller path of the quenching machine, and the frame height of the quenching machine based on the thickness and steel type of the first-section steel plate; and determining the running acceleration of the roller path of the quenching machine based on the length of the steel plate. Among them, the greater the length of the steel plate, the smaller the running acceleration of the roller path of the quenching machine. The size of the steel plate includes the length of the steel plate and the thickness of the first-section steel plate.

[0052] It can be understood that the parameter determination unit 120 includes: a third parameter determination subunit for taking the product of the thickness of the first-section steel plate and a preset tempering heating coefficient as the tempering heating time of the heating furnace; taking the product of the thickness of the first-section steel plate and a preset tempering holding coefficient as the tempering holding time of the heating furnace; and determining the tempering heating temperature of the heating furnace based on the steel type of the steel plate. Among them, the tempering heating parameters include tempering heating time, tempering holding time, and tempering heating temperature. Among them, the thickness of the first-section steel plate is 18 mm, the steel type of the steel plate is Q690, the tempering heating time is 58 min, the tempering holding time is 30 min, and the tempering heating temperature is 650 °C.

[0053] It can be understood that the quenching and tempering production line includes a heating furnace and a quenching machine; the heat treatment unit 130 is specifically configured to: control the heating furnace to perform quenching heating on the steel plate based on the quenching heating parameters; control the quenching machine to perform quenching water cooling on the steel plate based on the quenching water cooling parameters; control the heating furnace to perform tempering heating on the steel plate based on the tempering heating parameters.

[0054] It can be understood that the steel plate is a hot-rolled longitudinally variable-thickness steel plate, and the length of the first section of the steel plate is greater than or equal to 2 times the length of the second section of the steel plate.

[0055] It should be understood that more implementation details of the heat treatment control device 10 of the quenching and tempering production line in the embodiments of the present invention are referred to the heat treatment control method of the aforementioned quenching and tempering production line. For the sake of simplicity of the specification, it will not be elaborated here.

[0056] Based on the same inventive concept, the embodiments of the present invention also provide an electronic device, as Figure 4 shown, including a memory 404, a processor 402, and a computer program stored on the memory 404 and executable on the processor 402. The processor 402 executes the program to implement the steps of any one of the embodiments of the heat treatment control method of the quenching and tempering production line.

[0057] Among them, in Figure 4 , the bus architecture (represented by the bus 400), the bus 400 may include any number of interconnected buses and bridges. The bus 400 links together various circuits including one or more processors represented by the processor 402 and the memory represented by the memory 404. The bus 400 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art. Therefore, they will not be further described herein. The bus interface 405 provides an interface between the bus 400 and the receiver 401 and the transmitter 403. The receiver 401 and the transmitter 403 may be the same element, that is, a transceiver, providing a unit for communicating with various other devices on the transmission medium. The processor 402 is responsible for managing the bus 400 and general processing, and the memory 404 may be used to store data used by the processor 402 when performing operations.

[0058] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. In addition, each functional unit can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit.

[0059] In several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of units or modules can be in an electrical or other form.

[0060] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs and other various media that can store program codes.

[0062] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A heat treatment control method for a quenching and tempering production line, characterized in that, Including: Obtain the size of the steel plate, where the steel plate includes a first-section steel plate and a second-section steel plate adjacent to the first-section steel plate. The first-section steel plate is a steel plate with a uniform thickness, and the second-section steel plate is a steel plate with a variable thickness. The thickness of the first-section steel plate is greater than that of the second-section steel plate. The time when the first-section steel plate enters the quenching and tempering production line is earlier than the time when the second-section steel plate enters the quenching and tempering production line. Based on the size and steel grade of the steel plate, determine the quenching heating parameters; based on the size and steel grade of the steel plate, determine the quenching water cooling parameters; based on the size and steel grade of the steel plate, determine the tempering heating parameters. Based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters, control the quenching and tempering production line to perform heat treatment on the steel plate.

2. The heat treatment control method of the quenching and tempering production line according to claim 1, wherein The quenching and tempering production line includes a heating furnace; the determining the quenching heating parameters based on the size and steel grade of the steel plate includes: Take the product of the thickness of the first-section steel plate and a preset quenching heating coefficient as the quenching heating time of the heating furnace. Take the product of the thickness of the first-section steel plate and a preset quenching holding coefficient as the quenching holding time of the heating furnace. Based on the steel grade of the steel plate, determine the quenching heating temperature of the heating furnace. Wherein, the quenching heating parameters include the quenching heating time, the quenching holding time, and the quenching heating temperature, and the size of the steel plate includes the thickness of the first-section steel plate.

3. The heat treatment control method of the quenching and tempering production line according to claim 2, characterized in that The thickness of the first-section steel plate is 18 mm, the steel grade of the steel plate is Q690, the quenching heating time is 32 min, the quenching holding time is 20 min, and the quenching heating temperature is 900 °C.

4. The heat treatment control method of the quenching and tempering production line according to claim 1, characterized in that, The quenching and tempering production line includes a quenching machine; the determining the quenching water cooling parameters based on the size and steel grade of the steel plate includes: Based on the thickness and steel grade of the first-section steel plate, determine the water volume of the quenching machine, the initial value of the roller speed of the roller table of the quenching machine, and the frame height of the quenching machine. Based on the length of the steel plate, determine the running acceleration of the roller table of the quenching machine. Wherein, the greater the length of the steel plate, the smaller the running acceleration of the roller table of the quenching machine; the size of the steel plate includes the length of the steel plate and the thickness of the first-section steel plate.

5. The heat treatment control method of the quenching and tempering production line according to claim 2, characterized in that, The determining the tempering heating parameters based on the size and steel grade of the steel plate includes: Take the product of the thickness of the first-section steel plate and a preset tempering heating coefficient as the tempering heating time of the heating furnace. Take the product of the thickness of the first-section steel plate and a preset tempering holding coefficient as the tempering holding time of the heating furnace. Based on the steel grade of the steel plate, determine the tempering heating temperature of the heating furnace. Wherein, the tempering heating parameters include the tempering heating time, the tempering holding time, and the tempering heating temperature.

6. The heat treatment control method of the quenching and tempering production line according to claim 5, characterized in that The thickness of the first section of the steel plate is 18 mm, the steel grade of the steel plate is Q690, the tempering heating time is 58 min, the tempering holding time is 30 min, and the tempering heating temperature is 650 °C.

7. The heat treatment control method of the quenching and tempering production line according to claim 1, characterized in that, The quenching and tempering production line includes a heating furnace and a quenching machine; controlling the quenching and tempering production line to heat-treat the steel plate based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters includes: Based on the quenching heating parameters, controlling the heating furnace to perform quenching heating on the steel plate; Based on the quenching water cooling parameters, controlling the quenching machine to perform quenching water cooling on the steel plate; Based on the tempering heating parameters, controlling the heating furnace to perform tempering heating on the steel plate.

8. The heat treatment control method of the quenching and tempering production line according to any one of claims 1-7, wherein The steel plate is a hot-rolled longitudinally variable-thickness steel plate, and the length of the first section of the steel plate is greater than or equal to 2 times the length of the second section of the steel plate.

9. A heat treatment control device for a quenching and tempering production line, characterized in that, including: A dimension acquisition unit for acquiring the dimensions of the steel plate, the steel plate including a first section of steel plate and a second section of steel plate adjacent to the first section of steel plate, the first section of steel plate being a steel plate with a constant thickness, the second section of steel plate being a steel plate with a variable thickness, the thickness of the first section of steel plate being greater than the thickness of the second section of steel plate, and the first section of steel plate entering the quenching and tempering production line earlier than the second section of steel plate enters the quenching and tempering production line; A parameter determination unit for determining quenching heating parameters based on the dimensions and steel grade of the steel plate; determining quenching water cooling parameters based on the dimensions and steel grade of the steel plate; determining tempering heating parameters based on the dimensions and steel grade of the steel plate; A heat treatment unit for controlling the quenching and tempering production line to heat-treat the steel plate based on the quenching heating parameters, the quenching water cooling parameters, and the tempering heating parameters.

10. An electronic device, characterized in that, including: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1-8 when executing the computer program.

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