CN115094226A - Annealing control method and device for bell-type furnace - Google Patents
Annealing control method and device for bell-type furnace Download PDFInfo
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- CN115094226A CN115094226A CN202210628196.3A CN202210628196A CN115094226A CN 115094226 A CN115094226 A CN 115094226A CN 202210628196 A CN202210628196 A CN 202210628196A CN 115094226 A CN115094226 A CN 115094226A
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- 238000000137 annealing Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 238000004590 computer program Methods 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 238000004904 shortening Methods 0.000 abstract description 11
- 230000000630 rising effect Effects 0.000 abstract description 6
- 238000005097 cold rolling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012353 t test Methods 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
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Abstract
The invention discloses a bell-type furnace annealing control method and a bell-type furnace annealing control device, and relates to the technical field of steel cold rolling. After the bell-type furnace enters the annealing stage, N times of temperature rise control are carried out on strip steel in the bell-type furnace, and the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the preset time length, thereby shortening the time of the heating stage on the premise of not influencing the performance of the strip steel; after the bell-type furnace enters a cooling stage with a cover, the cooling time of the cover is controlled to be less than 4.5h, and the cooling time of the cover is shortened on the premise of not influencing the performance of the strip steel; thereby shortening the annealing period of the bell-type furnace in the temperature rising stage and the cooling stage with the bell.
Description
Technical Field
The invention relates to the technical field of steel cold rolling, in particular to a bell-type furnace annealing control method and a bell-type furnace annealing control device.
Background
On a steel cold rolling and tinning production line, a bell-type furnace unit is a key link for connecting a degreasing unit and an off-line leveling unit. At present, the productivity of a bell-type furnace on a production line is low, and the productivity of a hood withdrawal operation area is severely limited. The main factor limiting the bell-type furnace productivity is the excessively long annealing cycle. Therefore, in order to improve the productivity of the bell type furnace, a method for shortening the annealing cycle of the bell type furnace is urgently required.
Disclosure of Invention
The invention provides a bell-type furnace annealing control method and a bell-type furnace annealing control device, and solves the technical problem of how to shorten the annealing period of the bell-type furnace.
On one hand, the embodiment of the invention provides the following technical scheme:
a method for controlling annealing in a bell type furnace comprises the following steps:
after the bell-type furnace enters an annealing stage, carrying out N times of temperature rise control on the strip steel in the bell-type furnace, wherein the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth time of temperature rise control to the target temperature corresponding to the Mth time of temperature rise control and keeping the target temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and after the bell-type furnace enters a cooling stage with a cover, controlling the cooling time with the cover to be less than 4.5 h.
Preferably, N is 1.
Preferably, the target temperature corresponding to the nth time of the temperature increase control is 400 ℃.
Preferably, when N is 2, the target temperature corresponding to the 1 st heating control is 150 ℃ or 250 ℃.
Preferably, the shrouded cooling time is 3.5h or 3 h.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a bell type furnace annealing control apparatus comprising:
the temperature rise control module is used for carrying out N times of temperature rise control on the strip steel in the bell type furnace after the bell type furnace enters an annealing stage, wherein the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth time of temperature rise control to the target temperature corresponding to the Mth time of temperature rise control and keeping the target temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and the cooling control module is used for controlling the cooling time of the bell-type furnace to be less than 4.5h after the bell-type furnace enters a cooling stage with a bell.
Preferably, N is 1.
Preferably, the shrouded cooling time is 3.5h or 3 h.
On the other hand, the embodiment of the invention also provides the following technical scheme:
an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements any of the above methods for bell furnace annealing control.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the above-described methods of bell furnace annealing control.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
after the bell-type furnace enters the annealing stage, N times of temperature rise control are carried out on strip steel in the bell-type furnace, and the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the target temperature for a preset time, and shortening the time for the heating stage on the premise of not influencing the performance of the strip steel; after the bell-type furnace enters a cooling stage with a cover, the cooling time of the cover is controlled to be less than 4.5h, and the cooling time of the cover is shortened on the premise of not influencing the performance of the strip steel; thereby shortening the annealing period of the bell-type furnace in the temperature rising stage and the cooling stage with the bell.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling a bell furnace anneal in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a bell furnace anneal cycle in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a temperature raising mode of the temperature raising stage according to the embodiment of the present invention;
FIG. 4 is a timing diagram of the warming mode of FIG. 3;
FIG. 5 is a schematic diagram of another temperature-raising mode of the temperature-raising stage in the embodiment of the present invention;
FIG. 6 is a timing diagram of the warming mode of FIG. 5;
FIG. 7 is a schematic diagram showing the temperature difference comparison between the cold and hot points when the cooling time with the cover is 4.5h and 3.5h according to the embodiment of the present invention;
FIG. 8 is a schematic diagram of a double sample T-test of the performance of T3 strip steel at 4.5h and 3.5h of shrouded cooling time in an embodiment of the present invention;
FIG. 9 is a schematic diagram of a double sample T-test of the performance of T4 strip steel for 4.5h and 3.5h of cooling time of the strip cover in an embodiment of the present invention;
FIG. 10 is a schematic diagram illustrating the process capability test of the T3 strip steel performance at 4.5h and 3.5h cooling time of the strip enclosure in an embodiment of the present invention;
FIG. 11 is a schematic diagram illustrating the process capability test of the T4 strip steel performance at 4.5h and 3.5h cooling time of the strip cover in the embodiment of the invention;
FIG. 12 is a schematic structural view of a bell type furnace annealing control apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a bell-type furnace annealing control method and a bell-type furnace annealing control device, and solves the technical problem of shortening the annealing period of the bell-type furnace.
For better understanding of the technical solutions of the present invention, the technical solutions of the present invention will be described in detail below with reference to the drawings and specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
As shown in fig. 1, the method for controlling annealing in a bell type furnace of the present embodiment includes:
step S1, after the bell-type furnace enters the annealing stage, carrying out temperature rise control on the strip steel in the bell-type furnace for N times, wherein the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and step S2, controlling the cooling time of the bell-type furnace to be less than 4.5h after the bell-type furnace enters the cooling stage with the bell.
The working principle of the bell-type furnace is that steel coils are put into the bell-type furnace in a row, the internal stress and the work hardening of the cold-rolled strip steel are eliminated through the annealing stage, the structure refined crystal grains are improved, and the mechanical property and the deep drawing property of the strip steel are improved. After the bell-type furnace enters the annealing stage, the complete annealing cycle includes a temperature rise stage, a heat preservation stage, a cooling stage with a hood, an air cooling stage and a spray cooling stage, as shown in fig. 2. The important function of the temperature raising stage is to control the precipitation of aluminum nitride, and the temperature interval of the precipitation of aluminum nitride is above 400 ℃, so the final target temperature of the temperature raising stage is generally 400 ℃, that is, the target temperature corresponding to the nth temperature raising control in the embodiment is 400 ℃. In the embodiment, the time consumption of the heating-up stage and the cooling stage with the hood is mainly shortened to shorten the annealing period of the hood-type furnace.
In the temperature-raising stage of the bell-type furnace, the temperature of the strip steel in the bell-type furnace is generally controlled to rise from 0 ℃ (namely the temperature of the strip steel at the beginning of the 1 st temperature-raising control is 0 ℃) to 150 ℃ and is kept for a certain time, then the temperature of the strip steel is controlled to rise from 150 ℃ to 250 ℃ and is kept for a certain time, and finally the temperature of the strip steel is controlled to rise from 250 ℃ to 400 ℃ and is kept, as shown in fig. 3, the time of the temperature-raising stage is long, typically 187min, as shown in fig. 4; typically, the shrouded cooling time would be set to 4.5 hours. It is generally believed that the time of the warm-up phase and the shrouded cooling phase may be altered to affect the strip properties, and thus it is believed that the time of the warm-up phase and the shrouded cooling phase may not be altered.
In step S1 of this embodiment, when N is 1, only 1 time of temperature rise control is performed, i.e. the strip temperature is controlled to rise directly from 0 ℃ to 400 ℃ in the temperature rise stage, as shown in fig. 5, the time of the temperature rise stage is the least, usually 149min, as shown in fig. 6, which can shorten the time of the temperature rise stage by 38min, thereby shortening the annealing cycle of the bell-type furnace by 38 min. When N is 2, 2 times of temperature rise control are carried out, the target temperature corresponding to the 1 st time of temperature rise control is 150 ℃ or 250 ℃, namely, the temperature of the strip steel is firstly controlled to rise from 0 ℃ to 150 ℃ and is kept for a certain time, then the temperature of the strip steel is controlled to rise from 150 ℃ to 400 ℃, or the temperature of the strip steel is firstly controlled to rise from 0 ℃ to 250 ℃ and is kept for a certain time, then the temperature of the strip steel is controlled to rise from 250 ℃ to 400 ℃, and the temperature rise stage under the 2 times of temperature rise control is between 149min and 187min, so that the time of the temperature rise stage is shortened.
In this embodiment, after the temperature of the strip steel is controlled to directly rise from 0 ℃ to 400 ℃ in the temperature rising stage, the performance of the strip steel is subjected to double-sample t test and process capability test, and the results show that: p values of double-sample t test are all larger than 0.05, and the performance meets the requirement; the process capability parameters have no obvious fluctuation, and the performance meets the requirements. Thus proving that the temperature of the strip steel can be controlled to be directly increased from 0 ℃ to 400 ℃, the performance of the strip steel can not meet the requirement, and the inherent thought that the strip steel cannot be changed during the temperature rising stage is changed. Similarly, it is verified that the temperature of the strip steel can be controlled to rise from 0 ℃ to 150 ℃ and be kept for a certain time, and then the temperature of the strip steel is controlled to rise from 150 ℃ to 400 ℃, or the temperature of the strip steel is controlled to rise from 0 ℃ to 250 ℃ and be kept for a certain time, and then the temperature of the strip steel is controlled to rise from 250 ℃ to 400 ℃.
The main control factor of the cooling stage of the belt cover is the temperature difference of the cold and hot points of the steel coil, and the temperature difference of the cold and hot points is required to be less than 30 ℃. When the cooling time of the belt cover is 4.5 hours, the temperature difference of the cold and hot points is less than 30 ℃, and the performance of the strip steel meets the requirement. In step S2, experiments in this embodiment find that if the cooling time of the strip cover is controlled to be less than 4.5 hours, the temperature difference between the cold and hot points is also less than 30 ℃, and the performance of the strip steel meets the requirements. Taking the case of controlling the cooling time of the belt cover to be 3.5h, as shown in fig. 7, the temperature difference between the cold point and the hot point is also less than 30 ℃; the performance of the T3 and T4 strip steels was tested by a double sample T test and a process capability test at 4.5h and 3.5h of cooling time of the strip cover, and the results show that: when the cooling time of the belt cover is 3.5h, the p values of the double-sample t test are both greater than 0.05, and as shown in fig. 8 and 9, the performance meets the requirements; the process capability parameters do not fluctuate significantly, as shown in fig. 10 and 11, and the performance meets the requirements. The cooling time of the strip cover is controlled to be less than 4.5h, so that the performance of the strip steel cannot meet the requirement, and the inherent thought that the cooling time of the strip cover cannot be changed is changed. The cooling time of the strip cover can be shortened by 1h by controlling the cooling time of the strip cover to be 3.5h, so that the annealing period of the bell-type furnace is shortened by 1 h.
As can be seen from the above, in this embodiment, after the bell type furnace enters the annealing stage, the temperature rise control is performed on the strip steel in the bell type furnace N times, and the mth temperature rise control is performed as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the target temperature for a preset time, and shortening the time for the heating stage on the premise of not influencing the performance of the strip steel; after the bell-type furnace enters a cooling stage with a cover, the cooling time of the cover is controlled to be less than 4.5h, and the cooling time of the cover is shortened on the premise of not influencing the performance of the strip steel; thereby shortening the annealing period of the bell-type furnace in the temperature rising stage and the cooling stage with the bell.
Experiments show that the temperature difference between a cold point and a hot point is less than 30 ℃ when the cooling time of the belt cover is shortened to 0, the performance of the strip steel meets the requirement, when the cooling time of the belt cover is between 3.5h and 4.5h, the cooling time of the belt cover is shortened, the time consumption of an air cooling stage and a spray cooling stage is not increased, but when the cooling time of the belt cover is shortened to less than 3.5h, the cooling time of the belt cover is shortened by delta t when the cooling time of the belt cover is shortened by 3.5h, and the time consumption of the air cooling stage and the spray cooling stage is increased by delta t when the cooling time of the belt cover is shortened by delta t 2 . Therefore, the cooling time of the belt cover is controlled to be 3.5 hours so as not to increase the time consumption of the air cooling stage and the spray cooling stage. However, in order to shorten the annealing cycle of the bell type furnace to the maximum extent, it is necessary to consider that the reduction of the cooling time of the bell type furnace minus the increase of the cooling time of the air cooling stage and the spray cooling stage is the maximum, i.e., Δ t- Δ t 2 The value of (c) is maximum. It is conceivable that Δ t- Δ t when Δ t is 0.5h 2 The maximum time is 0.25h, namely the cooling time of the strip cover is controlled to be 3h, so that the annealing period of the cover furnace can be shortened to the maximum extent.
As shown in fig. 12, the present embodiment also provides a bell type furnace annealing control apparatus including:
the temperature rise control module is used for carrying out N times of temperature rise control on the strip steel in the bell type furnace after the bell type furnace enters an annealing stage, and the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the target temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and the cooling control module is used for controlling the cooling time of the belt cover to be less than 4.5h after the bell-type furnace enters the cooling stage of the belt cover.
In this embodiment, after the bell-type furnace enters the annealing stage, N times of temperature rise control are performed on the strip steel in the bell-type furnace, and the mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth heating control to the target temperature corresponding to the Mth heating control and keeping the preset time length, thereby shortening the time of the heating stage on the premise of not influencing the performance of the strip steel; after the bell-type furnace enters a cooling stage with a cover, the cooling time of the cover is controlled to be less than 4.5h, and the cooling time of the cover is shortened on the premise of not influencing the performance of the strip steel; thereby shortening the annealing period of the bell-type furnace in the temperature rising stage and the cooling stage with the bell.
Among them, N is preferably 1, and the time required for the temperature rise stage can be shortened to the maximum extent.
The cooling time of the belt cover can be 3.5h, and the cooling time of the belt cover is shortened to the maximum extent on the premise of not increasing the time of an air cooling stage and a spraying cooling stage; the cooling time of the belt cover can be 3h, and the annealing period of the bell-type furnace can be shortened to the maximum extent.
Based on the same inventive concept as the bell-type furnace annealing control method, the embodiment also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the bell-type furnace annealing control methods.
Where a bus architecture (represented by a bus) is used, the bus may comprise any number of interconnected buses and bridges that link together various circuits including one or more processors, represented by a processor, and memory, represented by a memory. The bus may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory may be used for storing data used by the processor in performing operations.
Since the electronic device described in this embodiment is an electronic device used for implementing the method for controlling the annealing of the bell jar furnace in the embodiment of the present invention, based on the method for controlling the annealing of the bell jar furnace described in the embodiment of the present invention, a person skilled in the art can understand the specific implementation manner of the electronic device in this embodiment and various variations thereof, and therefore, how to implement the method in the embodiment of the present invention in the electronic device will not be described in detail herein. Electronic equipment adopted by a person skilled in the art to implement the method for controlling the annealing of the bell type furnace in the embodiment of the invention belongs to the protection scope of the invention.
Based on the same inventive concept as the bell-type furnace annealing control method described above, the present invention also provides a computer-readable storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing any of the bell-type furnace annealing control methods described above.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for controlling annealing in a bell type furnace is characterized by comprising the following steps:
after the bell-type furnace enters an annealing stage, carrying out N times of temperature rise control on the strip steel in the bell-type furnace, wherein the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth time of temperature rise control to the target temperature corresponding to the Mth time of temperature rise control and keeping the target temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and after the bell-type furnace enters a cooling stage with a cover, controlling the cooling time with the cover to be less than 4.5 h.
2. The method for controlling annealing in a bell furnace according to claim 1, wherein N is 1.
3. The method of bell furnace annealing control of claim 1 wherein said target temperature for the nth time of said ramp control is 400 ℃.
4. The method for controlling bell type furnace annealing of claim 3 wherein when N is 2, the target temperature for the 1 st time of the temperature raising control is 150 ℃ or 250 ℃.
5. The method for bell jar annealing control of claim 1 wherein said shrouded cooling time is 3.5 hours or 3 hours.
6. A bell-type furnace annealing controlling means characterized by comprising:
the temperature rise control module is used for carrying out N times of temperature rise control on the strip steel in the bell-type furnace after the bell-type furnace enters an annealing stage, wherein the Mth time of temperature rise control is as follows: controlling the temperature of the strip steel in the bell-type furnace to rise from the temperature at the beginning of the Mth time of temperature rise control to the target temperature corresponding to the Mth time of temperature rise control and keeping the target temperature for a preset time, wherein N is 1 or 2, and M is a positive integer less than or equal to N;
and the cooling control module is used for controlling the cooling time of the bell-type furnace to be less than 4.5h after the bell-type furnace enters a cooling stage with the bell.
7. The bell furnace annealing control apparatus of claim 6 wherein N is 1.
8. The hood furnace annealing control device according to claim 6, wherein the hood cooling time is 3.5h or 3 h.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any of claims 1-5 when executing the program.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which when executed by a processor implements the method of annealing control in a bell furnace according to any one of claims 1 to 5.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2010132824A (en) * | 2010-08-04 | 2012-02-10 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") (RU) | METHOD OF ANNEALING IN A COOKING FURNACE |
| CN107502712A (en) * | 2017-09-15 | 2017-12-22 | 中天合金技术有限公司 | A kind of copper strips bell-type annealing technique |
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| RU2010132824A (en) * | 2010-08-04 | 2012-02-10 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") (RU) | METHOD OF ANNEALING IN A COOKING FURNACE |
| CN107502712A (en) * | 2017-09-15 | 2017-12-22 | 中天合金技术有限公司 | A kind of copper strips bell-type annealing technique |
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