CN117210649B

CN117210649B - Steel normalizing equipment and steel normalizing method

Info

Publication number: CN117210649B
Application number: CN202311221809.2A
Authority: CN
Inventors: 王毅; 解冰寒
Original assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd
Current assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-05-14
Anticipated expiration: 2043-09-21
Also published as: CN117210649A

Abstract

The invention discloses steel normalizing equipment and a steel normalizing method. The steel normalizing device comprises a heating chamber, a first heating device, a second heating device, a conveying device, a control module, a first temperature monitoring piece and a second temperature monitoring piece, wherein the heating chamber comprises a first heating zone and a second heating zone which are communicated; the control module is used for controlling the working state of the first heating device so as to enable the first temperature information to be the normalizing temperature; the control module is used for controlling the working state of the second heating device so as to enable the second temperature information to be the normalizing isothermal temperature; the control module is used for controlling the conveying device to drive the steel to move so that the steel moves to the first heating area and the second heating area in sequence, and stays in the first heating area for a first preset time period and/or stays in the second heating area for a second preset time period. By adopting the scheme, the problem of how to enable the traditional normalizing equipment to process steel with better performance is solved.

Description

Steel normalizing equipment and steel normalizing method

Technical Field

The invention relates to the technical field of steel heat treatment, in particular to steel normalizing equipment and a steel normalizing method.

Background

The normalizing of carbon steel is a heat treatment process of heating steel to 30-50 deg.c over AC3 or Acm, maintaining the temperature for certain period and air cooling. The cooling speed is high, the pearlite content in the tissue is high, and the lamellar layers are fine, so that the performance is improved. For low-carbon steel, the hardness can be improved after normalizing, so that the cutting machining performance can be improved, and the machining surface roughness can be reduced; in the case of high carbon steel, the normalizing eliminates the network cementite and provides for spheroidizing annealing and quenching.

The conventional steel normalizing method generally comprises two types of common normalizing and isothermal normalizing. The common normalizing is to heat the steel to the normalizing temperature and then quickly cool the steel by air, and has the advantages that the normalizing equipment only needs to be provided with a heating chamber to heat the steel to the normalizing temperature, the whole length of the normalizing equipment is shorter, the production efficiency is high, and the disadvantage is that the brittleness of the normalized steel is large; isothermal normalizing is to heat the steel to the normalizing temperature, then cool to the normalizing isothermal temperature within 3 minutes, then preserve heat for preset time (the preset time is different when the materials are different), the advantage is that the hardness dispersion difference of the normalized steel is smaller, the metallographic structure is more uniform, the toughness and the plasticity are better than those of the common normalizing, the disadvantage is that the normalizing equipment generally comprises an independent heating chamber, a cooling chamber and an isothermal chamber, the heating chamber is used for heating the steel to the normalizing temperature, the cooling chamber is used for preserving heat in the isothermal chamber after the steel is cooled to the normalizing isothermal temperature, so the whole length of the normalizing equipment is longer and the yield is low; moreover, as a continuous feeding control mode is adopted, for a workpiece with a longer length, the heating and heat preservation time lengths of the two ends of the workpiece in the furnace are different, so that metallographic phase inconsistency of the two ends of the workpiece can be caused. Because the structure of the traditional normalizing equipment is set based on a common normalizing method, only one heating chamber exists, how to process steel with better performance is a technical problem to be solved in the field.

Disclosure of Invention

The invention provides steel normalizing equipment and a steel normalizing method, which aim to solve the problem of how to enable the traditional normalizing equipment to process steel with better performance.

According to an aspect of the present invention, there is provided a steel normalizing apparatus including a heating chamber including a first heating zone and a second heating zone in communication, a first heating device, a second heating device, a conveying device, a control module, a first temperature monitor and a second temperature monitor;

The first temperature monitoring piece is used for monitoring the temperature of the first heating area to obtain first temperature information, the first heating device is used for heating the first heating area, the control module is used for acquiring the first temperature information in real time, and the working state of the first heating device is controlled based on the first temperature information so that the first temperature information is normalized temperature;

The second temperature monitoring piece is used for monitoring the temperature of the second heating area to obtain second temperature information, the second heating device is used for heating the second heating area, the control module is used for acquiring the second temperature information in real time, and the working state of the second heating device is controlled based on the second temperature information so that the second temperature information is normalized isothermal temperature;

The conveying device is arranged in the heating chamber and used for conveying steel, and the control module is used for controlling the conveying device to drive the steel to move so that the steel moves to the first heating zone and the second heating zone in sequence, and stays in the first heating zone for a first preset time period and/or stays in the second heating zone for a second preset time period.

In an alternative embodiment of the present invention, the control module is specifically configured to: adjusting a duty cycle of the first heating device based on the first temperature information to make the first temperature information a normalizing temperature;

And/or, the control module is specifically configured to: and adjusting the duty ratio of the second heating device based on the second temperature information so that the second temperature information is a normalizing isothermal temperature.

In an alternative embodiment of the present invention, the control module includes a temperature controller and a main controller, the first heating zone and the second heating zone each include a plurality of temperature control partitions, each of the temperature control partitions is provided with at least one temperature controller and at least one first temperature monitor, and the main controller is electrically connected with the temperature controller;

The temperature controller of the first heating zone is used for acquiring the first temperature information obtained by monitoring the first temperature monitoring piece of the temperature control partition in which the first heating zone is located in real time and outputting the first temperature information to the main controller, and the main controller is used for controlling the duty ratio of the first heating device of the corresponding temperature control partition based on the first temperature information so that the first temperature information of the corresponding temperature control partition is the normalizing temperature;

The temperature controller of the second heating zone is configured to obtain, in real time, the second temperature information obtained by monitoring the second temperature monitoring piece of the temperature control partition where the second temperature controller is located, and output the second temperature information to the main controller, where the main controller is configured to control a duty ratio of the second heating device of the corresponding temperature control partition based on the second temperature information, so that the second temperature information of the corresponding temperature control partition is the normalizing isothermal temperature.

In an alternative embodiment of the present invention, the control module further includes an overtemperature controller, where the overtemperature controller is electrically connected with the main controller, and the overtemperature controller is configured to determine whether the first temperature information exceeds a first preset temperature and determine whether the second temperature information exceeds a second preset temperature, and send alarm information to the main controller if the first temperature information exceeds the first preset temperature or the second temperature information exceeds the second preset temperature.

In an alternative embodiment of the present invention, the overtemperature controller is further configured to determine whether a difference between the first temperature information and the normalizing temperature exceeds a first preset difference and determine whether a difference between the second temperature information and the normalizing isothermal temperature exceeds a second preset difference, and send an alarm message to the main controller if the difference between the first temperature information and the normalizing isothermal temperature exceeds the first preset difference or the difference between the second temperature information and the normalizing isothermal temperature exceeds the second preset difference.

In an alternative embodiment of the invention, the first heating means and the second heating means each comprise a plurality of burners.

In an alternative embodiment of the present invention, the control module is configured to control the sequential ignition of a plurality of the burners located in the first heating zone based on a first preset timing;

And/or the control module is used for controlling a plurality of burners in the second heating zone to be sequentially ignited based on a second preset time sequence.

In an alternative embodiment of the present invention, the burners included in the first heating device and the second heating device are divided into two groups, one group of burners is disposed above the conveying device, and the other group of burners is disposed below the conveying device;

a heat insulation zone is arranged between the first heating zone and the second heating zone, and a heat insulation piece is arranged on the heat insulation zone; the number of the heat insulating pieces is two, one heat insulating piece is arranged at the top of the heat insulating area, and the other heat insulating piece is arranged at the bottom of the heat insulating area.

In an alternative embodiment of the present invention, the conveying device includes a plurality of conveying rollers and a power member for driving the plurality of conveying rollers to rotate to convey the steel.

According to another aspect of the present invention, there is provided a steel normalizing method for the steel normalizing apparatus according to any one of the embodiments of the present invention, the steel normalizing method comprising:

Controlling a conveying device to drive steel to move to a first heating zone, and keeping the steel in the first heating zone for a first preset time period so as to heat the steel to a normalizing temperature in the first heating zone, wherein the normalizing temperature is more than or equal to 800 ℃ and less than or equal to 950 ℃;

Controlling the conveying device to drive the steel to move from the first heating area to the second heating area and stay in the second heating area for a second preset time period, so that the steel is cooled to the normalizing isothermal temperature in the second heating area and is kept at the normalizing isothermal temperature for the second preset time period, the normalizing isothermal temperature is greater than or equal to 550 ℃ and less than or equal to 650 ℃, and the second preset time period is greater than or equal to 20 minutes and less than or equal to 40 minutes.

In an alternative embodiment of the present invention, the steel normalizing method further comprises:

obtaining a feeding mode, wherein the feeding mode comprises a stepping mode and a continuous mode;

when the feeding mode is a stepping mode and the steel stays in the first heating area for a first preset time period or stays in the second heating area for a second preset time period, the power piece is controlled to drive the conveying roller of the stay area to rotate for a preset circle number according to a preset rule, and the preset circle number is greater than or equal to 1/2 circle and less than or equal to 1 circle.

In an alternative embodiment of the present invention, after the obtaining the feeding mode, the method further includes:

Acquiring a feeding mode switching instruction;

when the feeding mode is a stepping type, switching the feeding mode into a continuous type based on the feeding mode switching instruction;

And when the feeding mode is continuous, switching the feeding mode into a stepping mode based on the feeding mode switching instruction.

According to the technical scheme, the first heating area and the second heating area which are communicated are arranged in the heating chamber, the control module can acquire the first temperature information in real time, the working state of the first heating device is controlled based on the first temperature information so that the first temperature information is the normalizing temperature, the control module can also acquire the second temperature information in real time, and the working state of the second heating device is controlled based on the second temperature information so that the second temperature information is the normalizing isothermal temperature. When the steel is normalized, the conveying device can drive the steel to move, so that the steel moves to the first heating zone and the second heating zone in sequence, and stays in the first heating zone for a first preset time period and/or stays in the second heating zone for a second preset time period. Therefore, the effect of the quasi-isothermal normalizing can be formed: according to the first aspect, for the steel with carbon on the surface, the isothermal heat preservation time is shortened, so that the surface decarburization of the steel can be prevented, for the steel with zero carbon on the surface, the carbon in the steel can be diffused to the surface of the steel by the carburizing reaction in the isothermal process, but the decarburization is avoided, and the better carburizing effect and decarburization preventing effect can be achieved; in the second aspect, the motor of the conveying device needs to keep a certain rotating speed to run, the length of the furnace body can be shortened by shortening the isothermal heat preservation time, the length of the steel normalizing device in the embodiment is between the length of the isothermal normalizing device and the length of the steel normalizing device in a common normalizing mode, the occupied area of the device can be reduced, and the factory building cost can be saved; in a third aspect, reducing isothermal incubation time can result in higher yields than isothermal normalizing; fourth, the steel normalizing equipment can give consideration to common normalizing, isothermal normalizing and the steel normalizing method, and when different products are produced, different normalizing effects can be achieved by only adjusting the temperature and the feeding speed of the steel, and the compatibility is strong.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a part of a steel normalizing apparatus according to an embodiment of the present invention;

FIG. 2 is a circuit block diagram of a steel normalizing device according to an embodiment of the present invention;

FIG. 3 is a circuit block diagram of another steel normalizing apparatus according to a first embodiment of the present invention;

FIG. 4 is a timing diagram of sequential ignition of a plurality of burners according to the first embodiment of the present invention;

fig. 5 is a flowchart of a steel normalizing method according to a second embodiment of the present invention.

Wherein: 1. a heating chamber; 11. a first heating zone; 12. a second heating zone; 13. a heat insulating member; 14. a thermally insulated zone; 2. a first heating device; 3. a second heating device; 4. a conveying device; 41. a conveying roller; 5. a control module; 51. a temperature controller; 52. a main controller; 53. an overtemperature controller; 6. a first temperature monitoring member; 7. a second temperature monitoring member; 8. a burner; 9. a partition.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a schematic diagram of a part of a steel normalizing apparatus according to a first embodiment of the present invention, fig. 2 is a circuit block diagram of a steel normalizing apparatus according to a first embodiment of the present invention, and the present embodiment is applicable to a case of normalizing a steel pipe, as shown in fig. 1 and fig. 2, where the steel normalizing apparatus includes a heating chamber 1, a first heating device 2, a second heating device 3, a conveying device 4, a control module 5, a first temperature monitor 6, and a second temperature monitor 7, and the heating chamber 1 includes a first heating zone 11 and a second heating zone 12 that are in communication.

The first temperature monitoring piece 6 is used for monitoring the temperature of the first heating area 11 to obtain first temperature information, the first heating device 2 is used for heating the first heating area 11, the control module 5 is used for obtaining the first temperature information in real time, and the working state of the first heating device 2 is controlled based on the first temperature information so that the first temperature information is normalized temperature.

The first temperature monitor 6 is a component capable of detecting temperature, and preferably, the first temperature monitor 6 is at least one of a temperature sensor and a thermocouple. The first temperature information is information reflecting the temperature value of the first heating zone 11 monitored by the first temperature monitoring member 6. The normalizing temperature is greater than or equal to 800 degrees and less than or equal to 950 degrees. Preferably, the normalizing temperature is greater than or equal to 850 degrees and less than or equal to 900 degrees. When the steel material is a steel pipe, the normalized steel pipe can be made more excellent in performance by making the normalizing temperature equal to or higher than 850 degrees and equal to or lower than 900 degrees. The first heating device 2 is a device capable of heating the first heating region 11, and the operating state of the first heating device 2 is a state when the first heating device 2 is performing a predetermined function, for example, the operating state includes the first heating device 2 being started up and stopped up. Preferably, in a specific embodiment, the first heating means 2 comprises a burner 8, and the operating conditions comprise ignition of the burner 8, non-ignition of the burner 8, etc. The temperature in the first heating zone 11 increases or maintains when the first heating means 2 starts heating, and the temperature in the first heating zone 11 decreases when the first heating means 2 stops heating. The control module 5 is a module capable of performing programming and executing instructions of logic operation, sequence control, timing, counting, arithmetic operation, and the like, and the control module 5 can control the operating state of the first heating device 2 based on the first temperature information by acquiring the first temperature information, and can adjust the operating state of the first heating device 2 in real time according to the current temperature value of the first heating zone 11 so that the first temperature information is a normalizing temperature and is maintained within a certain fluctuation range.

The second temperature monitoring piece 7 is used for monitoring the temperature of the second heating area 12 to obtain second temperature information, the second heating device 3 is used for heating the second heating area 12, the control module 5 is used for obtaining the second temperature information in real time, and the working state of the second heating device 3 is controlled based on the second temperature information so that the second temperature information is normalized isothermal temperature.

The second temperature monitor 7 is a member capable of detecting temperature, and preferably, the second temperature monitor 7 is at least one of a temperature sensor and a thermocouple. The second temperature information is information reflecting the temperature value of the second heating zone 12 monitored by the second temperature monitoring member 7. The normalizing isothermal temperature is greater than or equal to 550 degrees and less than or equal to 650 degrees. Preferably, the normalizing isothermal temperature is 600 degrees. When the steel material is a steel pipe, the normalized steel pipe can be made more excellent in performance by setting the normalized isothermal temperature to 600 degrees. The second heating device 3 is a device capable of heating the second heating region 12, and the operating state of the second heating device 3 is a state when the second heating device 3 is performing a prescribed function, for example, the operating state includes the second heating device 3 being started up and stopped up. Preferably, in a specific embodiment, the second heating means 3 comprises a burner 8, and the operating conditions comprise ignition of the burner 8, non-ignition of the burner 8, etc. The temperature in the second heating zone 12 will rise when the second heating device 3 starts heating, and the temperature in the second heating zone 12 will fall when the second heating device 3 stops heating, and the working state of the second heating device 3 can be adjusted in real time according to the current temperature value of the second heating zone 12 by acquiring the second temperature information and controlling the working state of the second heating device 3 based on the second temperature information, so that the second temperature information is the normalizing isothermal temperature and is maintained within a certain fluctuation range.

The conveying device 4 is arranged in the heating chamber 1 and is used for conveying steel, and the control module 5 is used for controlling the conveying device 4 to drive the steel to move so that the steel moves to the first heating zone 11 and the second heating zone 12 in sequence and stays in the first heating zone 11 for a first preset time period and/or stays in the second heating zone 12 for a second preset time period.

The conveying device 4 is a device for conveying the steel, and the first preset time period is a time period during which the steel is located in the first heating zone 11, and is not less than a time period during which the steel can be heated from the initial temperature to the normalizing temperature. The second preset duration refers to the duration of time that the steel is located in the second heating zone 12, and the second preset duration is the preset duration of time that the steel is kept at the normalizing isothermal temperature, and is determined by the specific normalizing process.

Preferably, the conveying device 4 includes a plurality of conveying rollers 41 and a power member for driving the plurality of conveying rollers 41 to rotate to convey the steel. The plurality of conveying rollers 41 may be disposed at intervals, and the power member may be a motor in a specific embodiment, and may be a device capable of driving the conveying rollers 41 to rotate. The steel material can be positioned above the conveying roller 41 when being conveyed, so that the conveying roller 41 can drive the steel material to move when rotating. Since the conveying device 4 is disposed inside the heating chamber 1, and the first heating zone 11 and the second heating zone 12 are both located inside the heating chamber 1, the conveying device 4 can drive the steel to move to the first heating zone 11, stay in the first heating zone 11 for a first preset time period to be heated to the normalizing temperature, then move to the second heating zone 12 and stay in the second heating zone 12 for a second preset time period. Since the temperature of the second heating zone 12 is kept at the normalizing isothermal temperature, when the steel moves from the first heating zone 11 to the second heating zone 12, the temperature of the steel is reduced from the normalizing isothermal temperature to the normalizing isothermal temperature in the second heating zone 12, and the residence time of the steel in the second heating zone 12 is the heat preservation time of the steel at the normalizing isothermal temperature, in this embodiment, the second preset time is longer than the heat preservation time of the conventional normalizing process and shorter than the heat preservation time of the conventional isothermal normalizing process, so that the similar isothermal normalizing is formed.

In the above-mentioned scheme, through setting up the first heating zone 11 and the second heating zone 12 of intercommunication in heating chamber 1, control module 5 can acquire first temperature information in real time, based on the operating condition of first heating device 2 of first temperature information control to make first temperature information be normalizing temperature, control module 5 can also acquire second temperature information in real time, based on the operating condition of second heating device 3 of second temperature information control, so that second temperature information is normalizing isothermal temperature. The conveying device 4 can drive the steel to move when normalizing the steel so that the steel moves to the first heating zone 11 and the second heating zone 12 in sequence, and stays in the first heating zone 11 for a first preset time period and/or stays in the second heating zone 12 for a second preset time period. The steel can be heated to the normalizing temperature for a first preset period of time in the first heating zone 11 and then cooled to the normalizing isothermal temperature in the second heating zone 12 for a short period of time and held at the normalizing isothermal temperature for a second preset period of time.

In the prior art, the heat preservation time of isothermal normalizing is different from 2 to 7 hours according to different types of steel materials, the steel materials travel in a furnace at a constant speed, the steel materials creep on a conveying roller 41 due to the too low rotating speed of a motor of a conveying device 4, and the accurate control of the tapping time is affected, so that the motor can normally keep low-speed operation capable of avoiding creeping; then the steel is kept in the furnace for a given time, and a furnace chamber needs to be long enough, so that the furnace body of the conventional normalizing equipment is very long; and isothermal conditions for too long can cause carbon in the steel to escape, resulting in decarburization of the surface.

In this embodiment, in order to avoid decarburization of the steel surface, the preset time for heat preservation is shorter than the existing isothermal normalizing time, about 20 minutes to 1 hour, and the effect of isothermal normalizing is formed: according to the first aspect, for the steel with carbon on the surface, the isothermal heat preservation time is shortened, so that the surface decarburization of the steel can be prevented, for the steel with zero carbon on the surface, the carbon in the steel can be diffused to the surface of the steel by the carburizing reaction in the isothermal process, but the decarburization is avoided, and the better carburizing effect and decarburization preventing effect can be achieved; in the second aspect, the motor of the conveying device 4 needs to keep a certain rotating speed to run, the length of the furnace body can be shortened by shortening the isothermal heat preservation time, the length of the steel normalizing device in the embodiment is between the length of the isothermal normalizing device and the length of the steel normalizing device in a common normalizing mode, the occupied area of the device can be reduced, and the factory cost can be saved; in the third aspect, shortening the isothermal holding time can lead to higher yield than isothermal normalizing, and the method has low cost, and can process steel with better performance even if using traditional normalizing equipment, and has higher yield and lower cost.

In an alternative embodiment of the invention, the control module 5 is specifically configured to: the duty ratio of the first heating device 2 is adjusted based on the first temperature information so that the first temperature information is the normalizing temperature.

The duty ratio is the ratio of the energization time to the total time in one pulse cycle. By adjusting the duty cycle of the first heating means 2, the ratio of the energization time and the de-energization time of the first heating means 2 is changed, and when the duty cycle is increased, the temperature in the first heating zone 11 is increased due to the increase of the energization time, and when the duty cycle is decreased, the temperature in the first heating zone 11 is decreased due to the decrease of the energization time. By adjusting the duty cycle of the first heating means 2 based on the first temperature information, it is possible to adjust the temperature of the first heating zone 11 until the first temperature information is the normalizing temperature and is maintained within a certain fluctuation range (the usual accuracy requirement is that the fluctuation be within ±5 ℃). For example, the duty ratio is increased when the first temperature information is lower than the normalizing temperature, and the duty ratio is decreased when the first temperature information is higher than the normalizing temperature, so that the first temperature information is the normalizing temperature.

In an alternative embodiment of the invention, the control module 5 is specifically configured to: the duty ratio of the second heating device 3 is adjusted based on the second temperature information so that the second temperature information is the normalizing isothermal temperature.

The duty ratio is the ratio of the energization time to the total time in one pulse cycle. By adjusting the duty cycle of the second heating means 3, the ratio of the energization time and the de-energization time of the second heating means 3 is changed, and when the duty cycle is increased, the temperature in the first heating zone 11 is increased due to the increase of the energization time, and when the duty cycle is decreased, the temperature in the first heating zone 11 is decreased due to the decrease of the energization time. By adjusting the duty cycle of the second heating means 3 based on the second temperature information, the temperature of the second heating zone 12 can be adjusted until the second temperature information is a normalizing isothermal temperature and maintained within a certain fluctuation range (the usual accuracy requirement is that the fluctuation be within ±5 ℃). For example, the duty ratio is increased when the second temperature information is lower than the normalizing isothermal temperature, and the duty ratio is decreased when the second temperature information is higher than the normalizing isothermal temperature, so that the second temperature information is the normalizing isothermal temperature.

In an alternative embodiment of the present invention, as shown in fig. 1 and 3, the control module 5 includes a temperature controller 51 and a main controller 52, each of the first heating zone 11 and the second heating zone 12 includes a plurality of temperature control zones, each temperature control zone is provided with at least one temperature controller 51 and at least one first temperature monitor 6, and the main controller 52 is electrically connected with the temperature controller 51.

The temperature controller 51 of the first heating zone 11 is configured to obtain, in real time, first temperature information obtained by monitoring the first temperature monitoring element 6 of the temperature control partition where the first heating zone is located, and output the first temperature information to the main controller 52, where the main controller 52 is configured to control the duty cycle of the first heating device 2 of the corresponding temperature control partition based on the first temperature information, so that the first temperature information of the corresponding temperature control partition is a normalizing temperature.

The temperature controller 51 of the second heating zone 12 is configured to obtain, in real time, second temperature information obtained by monitoring the second temperature monitoring element 7 of the temperature control zone where the second heating zone is located, and output the second temperature information to the main controller 52, where the main controller 52 is configured to control the duty cycle of the second heating device 3 of the corresponding temperature control zone based on the second temperature information, so that the second temperature information of the corresponding temperature control zone is the normalizing isothermal temperature.

Here, the temperature controller 51 means a controller for controlling temperature, and preferably, the temperature controller 51 may be a microprocessor. The main controller 52 is a component of the steel normalizing device that mainly performs logic control, and preferably, the main controller 52 may be a PLC. The temperature controller 51 may communicate with the master controller 52 via modbus. The temperature controller 51 of each temperature control zone in the first heating zone 11 is correspondingly connected with the first temperature monitoring member 6, and the temperature controller 51 of each temperature control zone in the second heating zone 12 is correspondingly connected with the second temperature monitoring member 7, so that each temperature control zone can execute independent temperature control. When the duty ratios of the first heating device 2 and the second heating device 3 are different, the frequencies and durations at which the first heating device 2 and the second heating device 3 are ignited are also different, so that temperature control can be achieved. Through setting up a plurality of control by temperature change subregions, when the temperature setting of two adjacent control by temperature change subregions is different, also can realize relative independent temperature control, reduce the mutual influence of two control by temperature change subregion temperatures, better realization different temperature's heat treatment's technological requirement.

Preferably, in a specific embodiment, the temperature-controlled areas of the first heating area 11 and the second heating area 12 are three. Further, a partition 9 is disposed between two adjacent temperature control partitions in the first heating area 11, the partition 9 may be made of a heat insulating material, and a partition 9 is also disposed between two adjacent temperature control partitions in the second heating area 12. In this way, the separator 9 can reduce the mutual influence of the temperatures of two adjacent temperature control partitions, and better realize independent temperature control of each temperature control partition.

In an alternative embodiment of the present invention, the control module 5 further includes an overtemperature controller 53, where the overtemperature controller 53 is electrically connected with the main controller 52, and the overtemperature controller 53 is configured to determine whether the first temperature information exceeds a first preset temperature and determine whether the second temperature information exceeds a second preset temperature, and send an alarm message to the main controller 52 if the first temperature information exceeds the first preset temperature or the second temperature information exceeds the second preset temperature. The overtemperature controller 53 is a controller capable of performing a logical operation. Preferably, the overtemperature controller 53 may be a microprocessor. The alarm information is information indicating that an overtemperature condition exists at the moment. When the first temperature information exceeds the first preset temperature or the second temperature information exceeds the second preset temperature, it indicates that at least one of the first heating zone 11 and the second heating zone 12 has an excessively high temperature, so that an alarm message is sent to the main controller 52 at this time, so that the main controller 52 timely knows the situation for safe production. Preferably, the overtemperature controller 53 communicates with the master controller 52 via modbus. In addition, the main controller 52 may control the first heating device 2 and/or the second heating device 3 to stop heating after receiving the alarm information, so that the first heating region 11 and the second heating region 12 may be prevented from being excessively heated.

In an alternative embodiment of the present invention, the overtemperature controller 53 is further configured to determine whether the difference between the first temperature information and the normalizing temperature exceeds a first preset difference and determine whether the difference between the second temperature information and the normalizing isothermal temperature exceeds a second preset difference, and send an alarm message to the main controller 52 if the difference between the first temperature information and the normalizing isothermal temperature exceeds the first preset difference or the difference between the second temperature information and the normalizing isothermal temperature exceeds the second preset difference. Wherein, the difference between the first temperature information and the normalizing temperature exceeds the first preset difference or the difference between the second temperature information and the normalizing isothermal temperature exceeds the second preset difference, which indicates that at least one temperature difference between the first heating zone 11 and the second heating zone 12 is too high, so that the main controller 52 sends out alarm information to the main controller 52 so that the main controller 52 knows the situation in time for safe production.

In an alternative embodiment of the invention, both the first heating means 2 and the second heating means 3 comprise a plurality of burners 8. The burner 8 is a device for ejecting and mixing fuel and air in a predetermined manner, and is generally called a burner. Industrial burners are commonly called burners, have a plurality of types and specifications, and are in various categories of fuel oil, fuel gas (coal gas) and coal (coal dust/coal water slurry), have wide application fields, and are required to be used in industrial occasions where fuel is required to burn to heat materials or react. By having the first heating means 2 and the second heating means 3 each comprise a plurality of burners 8, the burners 8 located in the first heating zone 11 can conveniently heat the first heating zone 11 and the burners 8 located in the second heating zone 12 can conveniently heat the second heating zone 12.

Optionally, when the first heating device 2 and the second heating device 3 each include a plurality of burners 8, the control module 5 is configured to adjust the duty cycle of the burners 8 of the first heating zone 11 based on the first temperature information so that the first temperature information is a normalizing temperature, and the control module 5 is further configured to adjust the duty cycle of the burners 8 of the second heating zone 12 based on the second temperature information so that the second temperature information is a normalizing isothermal temperature. When the duty ratio of the burner 8 is different, the frequency and duration of ignition of the burner 8 are also different, so that temperature control can be achieved.

Preferably, the steel normalizing device further comprises a radiant tube, wherein the burner 8 is arranged in the radiant tube, and the steel is heated by radiation without open fire.

In an alternative embodiment of the invention, the control module 5 is configured to control the sequential ignition of the plurality of burners 8 located in the first heating zone 11 based on a first preset timing. The first preset time sequence refers to a time sequence according to which the plurality of burners 8 in the first heating area 11 are ignited, if the plurality of burners 8 in the first heating area 11 are simultaneously ignited or simultaneously extinguished during temperature adjustment, the temperature may be unstable, the fluctuation is large, if only part of the burners 8 are continuously opened during temperature adjustment, the part of the burners 8 are continuously closed, the temperature difference in different areas is larger, the plurality of burners 8 in the first heating area 11 are sequentially ignited by controlling the first preset time sequence, the temperature uniformity can be ensured, the temperature stability is realized, the temperature fluctuation is smaller, and the temperature difference in different positions in the same area is smaller.

In a specific embodiment, the plurality of burners 8 in the first heating zone 11 are ordered in a certain order, for example, by the distance from the first heating zone 12, the first preset time sequence is that each burner 8 is controlled to ignite the next burner 8 after the ignition time reaches the preset time, the next burner 8 is controlled to ignite after the ignition time reaches the preset time, and so on until all the burners 8 are sequentially ignited, so that the cycle is performed, and at the same time, the burners 8 are extinguished after the ignition time reaches the on time, the on time is the power-on time of the burners 8 in the set duty ratio of the burners 8, that is, each burner 8 is ignited within one pulse period, the rest of the time is extinguished, the preset time is proportional to the on time, for example, the preset time in fig. 4 may be 1/2 of the on time, and the preset time may be 1/4 of the on time according to different requirements. As shown in fig. 4, the abscissa is time and the ordinate is the first preset time sequence for the ignition of the plurality of burners 8, it can be seen that in one pulse period, the burners 8 will ignite for 6 units of time, each burner 8 will start to ignite after 3 units of time, and so on until all burners 8 are ignited in turn, and then the first burner 8 is re-ignited. In this way, since different burners 8 are located at different positions, temperature uniformity can be ensured, temperature stabilization is achieved, temperature fluctuation is small, and temperature differences at different positions in the same region are also small.

In an alternative embodiment of the present invention, as shown in fig. 1 and 3, the control module 5 is configured to control the sequential ignition of the plurality of burners 8 located within the second heating zone 12 based on a second preset timing.

The second preset time sequence refers to a time sequence according to which the plurality of burners 8 in the second heating zone 12 are ignited, if the plurality of burners 8 in the second heating zone 12 are simultaneously ignited or simultaneously extinguished during temperature adjustment, the temperature may be unstable, the fluctuation is large, if only part of the burners 8 are continuously opened during temperature adjustment, the part of the burners 8 are continuously closed, the temperature difference in different areas is larger, the plurality of burners 8 in the second heating zone 12 are sequentially ignited by controlling the second preset time sequence, the temperature uniformity can be ensured, the temperature stability is realized, the temperature fluctuation is smaller, and the temperature difference in different positions in the same area is smaller.

Preferably, the second preset timing may be the same as the first preset timing.

In an alternative embodiment of the invention, the first heating means 2 and the second heating means 3 comprise burners 8 which are equally divided into two groups, one group of burners 8 being arranged above the conveyor 4 and the other group of burners 8 being arranged below the conveyor 4. That is, the two sets of burners 8 of the first heating zone 11 are located above and below the conveyor 4, respectively, and the two sets of burners 8 of the second heating zone 12 are also located above and below the conveyor 4, respectively, so that the steel on the conveyor 4 can be heated better, and the number of burners 8 of each set in the first heating zone 11 and the second heating zone 12 may be the same or different, and is not particularly limited herein.

The heat insulation area 14 is arranged between the first heating area 11 and the second heating area 12, the heat insulation area 14 is provided with a heat insulation member 13, the inside of the heating chamber 1 is a communicated space, and the heat insulation area 14 refers to the area of the inside of the heating chamber 1 between the first heating area 11 and the second heating area 12. The number of the heat insulating pieces 13 is two, and one heat insulating piece 13 is arranged on the top of the heat insulating zone 14, so that the heat insulating pieces 13 can better block the heat sources above the conveying device 4 in the first heating zone 11 and the second heating zone 12, and the temperature difference between the first heating zone 11 and the second heating zone 12 is formed. Another insulation 13 is provided at the bottom of the insulation zone 14. The heat shield 13 thus better blocks the heat source of the first heating zone 11 and the second heating zone 12 located below the conveyor 4, creating a temperature difference between the first heating zone 11 and the second heating zone 12.

Wherein, the heat insulating member 13 is a member capable of blocking heat, and since the steel material needs to move from the first heating zone 11 to the second heating zone 12, the first heating zone 11 and the second heating zone 12 need to be communicated, however, the temperatures of the first heating zone 11 and the second heating zone 12 are different, and by arranging the heat insulating member 13, the mutual influence of the temperatures of the first heating zone 11 and the second heating zone 12 can be reduced, so that the independent temperature control of the first heating zone 11 and the second heating zone 12 is better realized.

In particular, a heat shield 13 is arranged between the burner 8 located above the conveyor 4 in the first heating zone 11 and the burner 8 located above the conveyor 4 in the second heating zone 12; the heat shield 13 thus better blocks the heat source of the first heating zone 11 and the second heating zone 12 above the conveyor 4, creating a temperature difference between the first heating zone 11 and the second heating zone 12.

In particular, a further heat shield 13 is arranged between the burner 8 of the first heating zone 11 located below the conveyor 4 and the burner 8 of the second heating zone 12 located below the conveyor 4. The heat shield 13 thus better blocks the heat source of the first heating zone 11 and the second heating zone 12 located below the conveyor 4, creating a temperature difference between the first heating zone 11 and the second heating zone 12.

In an alternative embodiment of the invention, the insulation 13 is made of an insulating material; the heat insulating material (thermal insulation material) is a material capable of retarding heat flow transmission, also called a heat insulating material. Conventional thermal insulation materials such as glass fiber, asbestos, rock wool, silicate, alumina fiber, refractory brick, etc., and novel thermal insulation materials such as aerogel blanket, vacuum panels, etc. Since the steel material needs to move from the first heating area 11 to the second heating area 12, the first heating area 11 and the second heating area 12 need to be communicated, however, the temperatures of the first heating area 11 and the second heating area 12 are different, and the heat insulation member 13 is made of heat insulation materials, so that the mutual influence of the temperatures of the first heating area 11 and the second heating area 12 can be reduced, and the independent temperature control of the first heating area 11 and the second heating area 12 can be better realized. The length and height of the heat insulating member 13 are sufficient to form a temperature difference between the first heating region 11 and the second heating region 12, but not so great that the temperature of the region where the heat insulating member 13 is located is too low, so the length and height of the heat insulating member 13 may be selected according to the temperatures of the first heating region 11 and the second heating region 12 and the material of the heat insulating member 13, which is not particularly limited herein.

Example two

Fig. 5 is a flowchart of a steel normalizing method according to a second embodiment of the present invention, where the present embodiment is applicable to a case of normalizing a steel pipe, and the steel normalizing method is used in the steel normalizing apparatus according to any one of the embodiments of the present invention, and the method may be performed by a control module of the steel normalizing apparatus, as shown in fig. 5, and the steel normalizing method includes:

S110, controlling the conveying device to drive the steel to move to the first heating area, and staying in the first heating area to heat the steel to a normalizing temperature in the first heating area, wherein the normalizing temperature is more than or equal to 800 ℃ and less than or equal to 950 ℃.

The conveying device is a device capable of driving the steel to move, and the temperature of the first heating zone is the normalizing temperature, so that the steel can be heated to the normalizing temperature in the first heating zone when entering the first heating zone.

S120, controlling the conveying device to drive the steel to move from the first heating area to the second heating area and stay in the second heating area for a second preset time period, so that the steel is cooled to the normalizing isothermal temperature in the second heating area and is kept at the normalizing isothermal temperature for the second preset time period, the normalizing isothermal temperature is more than or equal to 550 ℃ and less than or equal to 650 ℃, and the second preset time period is more than or equal to 20 minutes and less than or equal to 40 minutes.

The first preset duration refers to a duration of time that the steel is located in the first heating zone 11, and the duration is not less than a duration of time that the steel can be heated from the initial temperature to the normalizing temperature. The temperature of the second heating zone is kept at the normalizing isothermal temperature, so that when the steel moves from the first heating zone to the second heating zone, the temperature of the steel is reduced to the normalizing isothermal temperature from the normalizing isothermal temperature in the second heating zone, the stay time of the steel in the second heating zone is the heat preservation time of the steel from the normalizing isothermal temperature, the longer the heat preservation time is, the closer the normalizing effect of the steel is to the isothermal normalizing, the second preset time is the preset heat preservation time of the steel at the normalizing isothermal temperature, and the longer the second preset time is, the closer the normalizing of the steel is to the isothermal normalizing.

In the prior art, the heat preservation time of isothermal normalizing is different from 2 to 7 hours according to different steel types, the steel moves in the furnace at a constant speed, the steel can creep on a conveying roller due to the too low rotating speed of a motor of a conveying device, and the accurate control of the tapping time is affected, so that the motor can generally keep low-speed operation capable of avoiding creeping; then the steel is kept in the furnace for a given time, and a furnace chamber needs to be long enough, so that the furnace body of the conventional normalizing equipment is very long; and isothermal conditions for too long can cause carbon in the steel to escape, resulting in decarburization of the surface.

According to the scheme, the steel is heated to the normalizing temperature firstly, then the steel is cooled to the normalizing isothermal temperature in a short time, and the normalizing isothermal temperature is used for preserving heat for a second preset time, so that the surface decarburization of the steel is avoided, the second preset time of the scheme is shorter than the existing isothermal normalizing time, and the second preset time is longer than or equal to 20 minutes and smaller than or equal to 40 minutes, so that the effect similar to isothermal normalizing can be achieved: according to the first aspect, for the steel with carbon on the surface, the time of heat preservation at the normalizing isothermal temperature is shortened, so that the surface decarburization of the steel can be prevented, and for the steel with zero carbon on the surface, the carbon in the steel can be diffused to the surface of the steel by the carburizing reaction in the heat preservation at the normalizing isothermal temperature, but the decarburization is avoided, and the better carburizing effect and decarburization preventing effect can be achieved; in the second aspect, the motor of the conveying device needs to keep a certain rotating speed to run, the length of the furnace body can be shortened by shortening the second preset time length of heat preservation at the normalizing isothermal temperature, and the length of the steel normalizing equipment in the embodiment is between the length of the isothermal normalizing and the length of the equipment in the normal normalizing mode, so that the occupied area of the equipment can be reduced, and the factory building cost can be saved; in a third aspect, shortening the second preset time period of incubation at the normalizing isothermal temperature allows for higher throughput than isothermal normalizing, lower cost, and higher throughput and lower cost of steel products that are more excellent than isothermal normalizing, even with conventional normalizing equipment.

In an alternative embodiment of the present invention, the normalizing temperature is greater than or equal to 850 degrees and less than or equal to 900 degrees. When the steel material is a steel pipe, the normalized steel pipe can be made more excellent in performance by making the normalizing temperature equal to or higher than 850 degrees and equal to or lower than 900 degrees.

In an alternative embodiment of the invention, the normalizing isothermal temperature is 600 degrees. When the steel material is a steel pipe, the normalized steel pipe can be made more excellent in performance by setting the normalized isothermal temperature to 600 degrees.

In an alternative embodiment of the invention, the second preset time period is 30 minutes. The second preset time length is the preset time length of heat preservation at the normalizing isothermal temperature, the second preset time length is 30 minutes, so that isothermal-like normalizing can be formed, the heat preservation time is shorter than that of isothermal normalizing, the unit energy consumption is reduced, the length of steel normalizing equipment is between the length of equipment in an isothermal normalizing mode and that of equipment in a common normalizing mode, the occupied area is reduced, the yield is higher than that of isothermal normalizing, the cost is low, and the problem of how to enable the traditional normalizing equipment to process steel with better performance is solved.

In an alternative embodiment of the invention, the steel normalizing method further comprises:

Feed modes are obtained, including stepwise and continuous.

The steel tube normalizing furnace comprises a feeding section, a heating chamber, a quick cooling section, a slow cooling section and a discharging section in sequence according to the running direction of the steel tube. In the continuous feeding mode, according to the time of heating and heat preservation of the steel in the furnace, the conveying rollers of each section keep the same running speed, and the steel runs on a roller way at a constant speed. In the process of uniform speed operation, steel is fed from the feeding section, then moves to the first heating area entering the heating chamber, then moves to the second heating area, then moves to the fast cooling section after leaving the heating chamber, and finally is fed from the discharging section through the slow cooling section. In the step-by-step feeding mode, the steel is quickly conveyed to the appointed position of the first heating area by the conveying device and stays, after reaching the preset heating time or temperature, namely, after the steel is heated to the normalizing temperature, the steel is quickly conveyed to the appointed position of the second heating area by the conveying device, stays for a second preset time length, and is quickly conveyed out of the furnace after isothermal heat preservation is finished. In the step feeding mode, the steel does not always run at a constant speed in the heating chamber at a set process speed, and the steel moves at a set beat.

When the feeding mode is stepping and the steel stays in the first heating area for a first preset time period or stays in the second heating area, the power piece is controlled to drive the conveying roller of the stay area to rotate for a preset number of turns according to a preset rule, and the preset number of turns is greater than or equal to 1/2 turn and less than or equal to 1 turn. The preset law may be to reciprocate at a low speed.

The preset rule refers to a preset rule of rotation of the conveying roller, for example, the preset rule may be that the conveying roller rotates clockwise for a preset number of turns and then rotates anticlockwise for a preset number of turns; the preset rule may be that the conveying roller rotates counterclockwise for a preset number of turns and then rotates clockwise for a preset number of turns, which is not particularly limited herein. The stay area is the area where the steel stays.

When the feeding mode is a step mode, if the conveying roller included in the conveying device does not rotate to enable the steel to stay in the second heating area, the conveying roller can deform due to the fact that the steel is stressed at high temperature. The power piece is controlled to drive the conveying roller to rotate for a preset number of turns according to a preset rule, so that the conveying roller can be prevented from being deformed under pressure in a steel heat-preserving high-temperature environment.

Preferably, the preset number of turns is greater than or equal to 5/8 and less than or equal to 7/8. Further, the preset number of turns is 3/4.

And acquiring a feeding mode switching instruction. The feeding mode switching command is a command for indicating the feeding mode to switch, and the feeding mode is switched between the stepping mode and the continuous mode based on the feeding mode switching command because the feeding mode has two modes of the stepping mode and the continuous mode.

And when the feeding mode is stepwise, switching the feeding mode into continuous mode based on the feeding mode switching instruction.

By the method, the feeding mode of the steel normalizing device can be switched between the stepping mode and the continuous mode according to production requirements.

The continuous feeding mode can meet the production of common steel, for example, the existing and conventional normalizing process, the production of steel with low performance requirements and the like can be realized, and the steel normalizing method of the embodiment can also be realized; the step-by-step feeding mode can realize the steel normalizing method of the embodiment, the control of the normalizing process is more accurate, and higher product quality can be obtained. The embodiment sets a stepping type and continuous type switchable feeding mode, so that one device can produce products with more specifications and quality, is suitable for different production requirements, and achieves full and effective utilization of the device.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The steel normalizing device is characterized by comprising a heating chamber (1), a first heating device (2), a second heating device (3), a conveying device (4), a control module (5), a first temperature monitoring piece (6) and a second temperature monitoring piece (7), wherein the heating chamber (1) comprises a first heating zone (11) and a second heating zone (12) which are communicated;

The first temperature monitoring piece (6) is used for monitoring the temperature of the first heating area (11) to obtain first temperature information, the first heating device (2) is used for heating the first heating area (11), the control module (5) is used for acquiring the first temperature information in real time, and the working state of the first heating device (2) is controlled based on the first temperature information so that the first temperature information is a normalizing temperature; wherein the normalizing temperature is greater than or equal to 800 degrees and less than or equal to 950 degrees;

The second temperature monitoring piece (7) is used for monitoring the temperature of the second heating area (12) to obtain second temperature information, the second heating device (3) is used for heating the second heating area (12), the control module (5) is used for acquiring the second temperature information in real time, and the working state of the second heating device (3) is controlled based on the second temperature information so that the second temperature information is a normalizing isothermal temperature; wherein the normalizing isothermal temperature is greater than or equal to 550 degrees and less than or equal to 650 degrees;

The conveying device (4) is arranged in the heating chamber (1) and used for conveying steel, the control module (5) is used for controlling the conveying device (4) to drive the steel to move so that the steel moves to the first heating zone (11) and the second heating zone (12) in sequence, and stays in the first heating zone (11) for a first preset time period and stays in the second heating zone (12) for a second preset time period, and the second preset time period is longer than or equal to 20 minutes and less than or equal to 40 minutes;

The first heating device (2) and the second heating device (3) each comprise a plurality of burners (8);

The burners (8) included in the first heating device (2) and the second heating device (3) are divided into two groups, one group of the burners (8) is arranged above the conveying device (4), and the other group of the burners (8) is arranged below the conveying device (4);

A heat insulation zone (14) is arranged between the first heating zone (11) and the second heating zone (12), and the heat insulation zone (14) is provided with a heat insulation piece (13); the number of the heat insulating pieces (13) is two, one heat insulating piece (13) is arranged at the top of the heat insulating area (14), and the other heat insulating piece (13) is arranged at the bottom of the heat insulating area (14).

2. The steel normalizing apparatus according to claim 1, wherein the control module (5) is specifically configured to: adjusting the duty cycle of the first heating device (2) based on the first temperature information such that the first temperature information is a normalizing temperature;

And/or, the control module (5) is specifically configured to: and adjusting the duty ratio of the second heating device (3) based on the second temperature information so that the second temperature information is a normalizing isothermal temperature.

3. The steel normalizing apparatus according to claim 2, wherein the control module (5) comprises a temperature controller (51) and a main controller (52), the first heating zone (11) and the second heating zone (12) each comprise a plurality of temperature controlled zones, each temperature controlled zone being provided with at least one temperature controller (51) and at least one first temperature monitor (6), the main controller (52) being electrically connected with the temperature controller (51);

The temperature controller (51) of the first heating zone (11) is configured to acquire, in real time, the first temperature information obtained by monitoring by the first temperature monitoring element (6) of the temperature control partition where the first heating zone is located and output the first temperature information to the main controller (52), where the main controller (52) is configured to control, based on the first temperature information, a duty cycle of the first heating device (2) of the corresponding temperature control partition, so that the first temperature information of the corresponding temperature control partition is the normalizing temperature;

the temperature controller (51) of the second heating zone (12) is configured to obtain, in real time, the second temperature information obtained by monitoring by the second temperature monitoring element (7) of the temperature control partition where the second heating zone is located, and output the second temperature information to the main controller (52), where the main controller (52) is configured to control, based on the second temperature information, a duty cycle of the second heating device (3) of the corresponding temperature control partition, so that the second temperature information of the corresponding temperature control partition is the normalizing isothermal temperature.

4. A steel normalizing device according to claim 3, wherein the control module (5) further comprises an overtemperature controller (53), the overtemperature controller (53) being electrically connected with the main controller (52), the overtemperature controller (53) being adapted to determine whether the first temperature information exceeds a first preset temperature and to determine whether the second temperature information exceeds a second preset temperature, and to issue an alarm message to the main controller (52) if the first temperature information exceeds the first preset temperature or the second temperature information exceeds the second preset temperature.

5. The steel normalizing apparatus according to claim 4, wherein the overtemperature controller (53) is further configured to determine whether the difference between the first temperature information and the normalizing temperature exceeds a first preset difference and determine whether the difference between the second temperature information and the normalizing isothermal temperature exceeds a second preset difference, and send an alarm message to the main controller (52) if the difference between the first temperature information and the normalizing isothermal temperature exceeds the first preset difference or the difference between the second temperature information and the normalizing isothermal temperature exceeds the second preset difference.

6. The steel normalizing apparatus according to claim 1, wherein the control module (5) is configured to control the sequential ignition of a plurality of the burners (8) located in the first heating zone (11) based on a first preset timing;

And/or the control module (5) is used for controlling a plurality of burners (8) positioned in the second heating zone (12) to be sequentially ignited based on a second preset time sequence.

7. The steel normalizing apparatus according to any one of claims 1 to 5, wherein the conveying device (4) includes a plurality of conveying rollers (41) and power members for driving the plurality of conveying rollers (41) to rotate to convey the steel.

8. A steel normalizing method for the steel normalizing apparatus according to any one of claims 1 to 7, comprising:

Controlling the conveying device to drive the steel to move from the first heating area to the second heating area and stay in the second heating area for a second preset time period, so that the steel is cooled to a normalizing isothermal temperature in the second heating area and is kept at the normalizing isothermal temperature for the second preset time period, wherein the normalizing isothermal temperature is more than or equal to 550 ℃ and less than or equal to 650 ℃, and the second preset time period is more than or equal to 20 minutes and less than or equal to 40 minutes;

9. The steel normalizing method according to claim 8, further comprising, after the obtaining of the feeding pattern:

Acquiring a feeding mode switching instruction;