High-carbon high-strength steel rolling method and system and readable storage medium
By adjusting the furnace flame, increasing the rolling speed, and widening the roll gap, the problem of strip head damage to the rolls during hot continuous rolling of high-carbon, high-strength steel was solved, resulting in reduced roll consumption and energy consumption, and improved production efficiency and output.
Patent Information
- Application Number
- CN202511300483.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2025-11-25
AI Technical Summary
During the hot strip rolling process of high-carbon high-strength steel, the strip head has a low temperature and high strength, which can easily damage the rolls, resulting in roll marks, increased roll wear and energy consumption, and affecting rolling efficiency and output.
By adjusting the furnace flame to make the strip head temperature higher than the body temperature, increasing the rolling speed and roll linear speed, widening the roll gap, and controlling the start-up time of cooling water and dust suppression water, the impact damage of the strip head to the rolls can be reduced.
It effectively reduces damage to the rolls from the strip head, lowers roll consumption and energy consumption, and improves production efficiency and output.
Smart Images
Figure CN121004181A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steel manufacturing, and in particular to a rolling method, system, and readable storage medium for high-carbon, high-strength steel. Background Technology
[0002] During the hot strip rolling process of high-carbon high-strength steel, the strip head has a low temperature and high strength. If it collides with the rolls, it can easily damage the rolls, resulting in batches of roll marks on the strip. This requires unplanned shutdowns to replace the rolls, increasing roll consumption, electricity consumption, and fuel consumption, and affecting the rolling operation rate and output. Summary of the Invention
[0003] This invention provides a rolling method, system, and readable storage medium for high-carbon, high-strength steel, which effectively reduces the damage to the rolls by the strip head during the production of high-carbon, high-strength steel, and reduces roll consumption and various energy losses.
[0004] In a first aspect, embodiments of the present invention provide a rolling method for high-carbon, high-strength steel, characterized in that it is applied to a seven-mill hot rolling production line, comprising:
[0005] During the rolling of the target strip, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the head of the target strip is higher than the temperature of the body of the target strip, wherein the target strip is high-carbon high-strength steel;
[0006] Based on the type of the target strip, the original rolling temperature, and the target rolling temperature, a target rolling speed is determined, and a first distance is rolled at the head of the target strip at the target rolling speed.
[0007] The roll linear speeds of the fifth, sixth, and seventh rolling mills are controlled to be higher than the bite speed of the target strip and maintained for a first preset duration.
[0008] The roll gaps of the fifth, sixth, and seventh rolling mills are controlled to increase in the opposite direction to the target roll gap and continue for a second preset duration to increase the bite-in roll gap of the target strip.
[0009] In some embodiments, the method further includes:
[0010] The cooling water and dust suppression water between the control frames are activated after the target strip head has been cleared a second distance.
[0011] In some embodiments, the planned rolling order corresponding to the target strip steel involves first rolling a preset quantity of ordinary structural steel, and then rolling the target strip steel. The method further includes:
[0012] When rolling the preset quantity of ordinary structural steel, the steel output rhythm of the ordinary structural steel is determined to be less than or equal to the preset time interval, and the cooling water volume of the work roll is adjusted to the target water volume, which is less than the original water volume of the cooling water of the work roll.
[0013] In some embodiments, the preset quantity ranges from 10 to 15 blocks.
[0014] In some embodiments, adjusting the flame in the heating furnace used to heat the target strip head includes:
[0015] The opening of the burner used to heat the head of the target strip is increased to a target opening, so that the temperature of the head of the target strip is 10-20°C higher than the temperature of the body of the target strip, wherein the target opening is greater than the original opening of the burner.
[0016] In some embodiments, the initial rolling temperature is greater than or equal to 890°C and less than 900°C, and the target rolling temperature is greater than or equal to 900°C and less than or equal to 920°C.
[0017] In some embodiments, controlling the roll linear speed of the fifth, sixth, and seventh rolling mills to be higher than the bite speed of the target strip and maintaining this for a first preset duration includes:
[0018] The roll linear speed of the fifth, sixth, and seventh rolling mills is controlled to be 0.5% to 1% higher than the bite speed.
[0019] In some embodiments, controlling the roll gaps of the fifth, sixth, and seventh rolling mills to increase in the opposite direction to the target roll gap and continue for a second preset duration includes:
[0020] The roll gap of the fifth, sixth, and seventh rolling mills is increased in the opposite direction by 5% to 10%.
[0021] Secondly, embodiments of the present invention provide a rolling system for high-carbon, high-strength steel, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps in the above-described rolling method for high-carbon, high-strength steel.
[0022] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the above-described rolling method for high-carbon, high-strength steel.
[0023] Fourthly, embodiments of the present invention provide a computer program product, the computer program product including a computer program, which, when executed by a processor, is used to load and execute the steps in the above-described rolling method for high-carbon and high-strength steel.
[0024] The above-described one or more technical solutions in the embodiments of this application have at least the following technical effects:
[0025] The high-carbon, high-strength steel rolling method provided in this specification is applied to a seven-mill hot rolling production line. During the rolling of high-carbon, high-strength steel, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the target strip head is higher than the temperature of the target strip body. Based on the strip type, the original rolling temperature, and the target rolling temperature, a target rolling speed is determined, and the head of the target strip is rolled a first distance at the target rolling speed. The roll linear speeds of the fifth, sixth, and seventh mills are controlled to be higher than the bite speed of the target strip for a first preset duration. The roll gaps of the fifth, sixth, and seventh mills are controlled to increase in the opposite direction to the target roll gap for a second preset duration to increase the bite gap of the target strip. This solution increases the temperature of the target strip head by adjusting the heating flame at the head and increasing the rolling speed of the target strip head, thereby avoiding impact damage to the rolls caused by the low-temperature strip head. In addition, by increasing the roll linear speed from the fifth to the seventh rolling mill and widening the roll gap from the fifth to the seventh rolling mill, damage to the rolls from the strip head is reduced. By adjusting the rolling process of the target strip head from multiple aspects, this solution effectively reduces damage to the rolls from the strip head, reduces roll consumption, and thus improves the operating rate and output of the production line. Attached Figure Description
[0026] Figure 1 A flowchart illustrating a rolling method for high-carbon, high-strength steel, provided as an embodiment of this specification;
[0027] Figure 2 A schematic diagram of a rolling apparatus for high-carbon, high-strength steel provided in the embodiments of this specification;
[0028] Figure 3 This is a schematic diagram of a rolling system for high-carbon, high-strength steel provided in the embodiments of this specification. Detailed Implementation
[0029] The overall technical solution of this application embodiment is as follows: When rolling the target strip, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the head of the target strip is higher than the temperature of the body of the target strip, wherein the target strip is high-carbon high-strength steel; based on the type of the target strip, the original rolling temperature and the target rolling temperature, a target rolling speed is determined, and the head of the target strip is rolled a first distance at the target rolling speed; the roll linear speed of the fifth, sixth and seventh rolling mills is controlled to be higher than the bite speed of the target strip and maintained for a first preset time; the roll gap of the fifth, sixth and seventh rolling mills is controlled to increase in the opposite direction to the target roll gap and maintained for a second preset time, so as to increase the bite gap of the target strip.
[0030] In the embodiments of this specification, the temperature of the strip head is increased by adjusting the heating flame at the head of the target strip and increasing the rolling speed at the head of the target strip, thereby avoiding impact damage to the rolls caused by the low-temperature strip head. In addition, the damage to the rolls by the strip head is reduced by increasing the roll linear speed of the fifth to seventh rolling mills and increasing the roll gap between the fifth to seventh rolling mills. The rolling process of the head of the target strip is adjusted from multiple aspects, which effectively reduces the damage to the rolls by the strip head, reduces roll consumption, and thus improves the operating rate and output of the production line.
[0031] To better understand the above technical solutions, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Unless otherwise specified, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0032] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0033] like Figure 1 The diagram shows a flowchart of a rolling method for high-carbon, high-strength steel provided in an embodiment of this specification. This method is applied to a hot rolling production line of a seven-mill rolling mill and includes the following steps:
[0034] Step S101: When rolling the target strip, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the head of the target strip is higher than the temperature of the body of the target strip, wherein the target strip is high-carbon high-strength steel;
[0035] Step S102: Based on the type of the target strip, the original rolling temperature and the target rolling temperature, determine the target rolling speed, and roll the head of the target strip a first distance at the target rolling speed;
[0036] Step S103: Control the roll linear speed of the fifth, sixth and seventh rolling mills to be higher than the bite speed of the target strip and maintain this for a first preset time.
[0037] Step S104: Control the roll gaps of the fifth, sixth, and seventh rolling mills to increase in the opposite direction to the target roll gap and continue for a second preset duration to increase the bite-in roll gap of the target strip.
[0038] The method provided in the embodiments of this specification can be applied to a seven-stand hot rolling production line, which includes seven stands from F1 to F7. In addition, the production line may also include descaling equipment, cooling water, roll gap water, and dust suppression water equipment.
[0039] High-carbon high-strength steel is a type of steel with a high carbon content and high mechanical strength. In some embodiments, the carbon content of high-carbon high-strength steel can be greater than 0.6%, and the tensile strength can be greater than 600 MPa. It should be noted that the tensile strength or yield strength of high-carbon high-strength steel is significantly higher than that of ordinary structural steel.
[0040] Because the head of high-carbon, high-strength steel has a low temperature and high strength, it is easily damaged by impact with the rolls, resulting in roll marks on the strip. In this embodiment of the specification, to avoid this problem, the temperature of the strip head can be increased to reduce the impact damage to the rolls caused by the low-temperature strip head. Therefore, in step S101, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the target strip head is higher than the temperature of the target strip body. In some embodiments, the temperature of the target strip head can be increased by 10°C to 20°C compared to the body temperature by adjusting the heating furnace flame.
[0041] Step S101 can be implemented in various ways. In some embodiments, the adjustment of the furnace flame can be achieved by the following steps: increasing the opening of the burner used to heat the head of the target strip to a target opening, so that the temperature of the head of the target strip is 10-20°C higher than the temperature of the body of the target strip, wherein the target opening is greater than the original opening of the burner.
[0042] Specifically, the heating furnace can be equipped with multiple burners, each used to heat different areas of the strip. For example, the burners in the furnace can be grouped into head heating zones and body heating zones. To increase the temperature of the strip head, the burner opening in the head heating zone can be increased to a target opening. The target opening can be set according to actual needs; for example, the initial burner opening is 85%–90%, and the target opening can be 90%–95%. By increasing the burner opening, the flame intensity is increased, thereby raising the temperature of the head of the target strip.
[0043] In addition, the gas flow rate of the burner in the head heating zone can be increased, for example, by increasing the gas flow rate by 10% to 20%, thereby achieving the heating of the head of the target strip steel.
[0044] In the embodiments of this specification, the head temperature and body temperature of the target strip can be detected in real time to obtain the difference between the head temperature and the body temperature. The head temperature and body temperature can be controlled within a preset temperature difference range through temperature closed-loop feedback, such as the head temperature being 10°C to 20°C higher than the body temperature.
[0045] In step S102, to further increase the head temperature of the target strip, the rolling speed of the target strip is increased. In this embodiment of the specification, the original rolling temperature and the target rolling temperature can be preset. The original rolling temperature is the planned rolling temperature of the target strip, and the target rolling temperature is the rolling temperature after heating the head of the target strip. In some embodiments, the original rolling temperature is greater than or equal to 890°C and less than 900°C, and the target rolling temperature is greater than or equal to 900°C and less than or equal to 920°C. The target rolling temperature can be issued through a secondary system.
[0046] It should be noted that the rolling speed required to increase from the initial rolling temperature to the target rolling temperature may differ for different steel grades. In the embodiments of this specification, determining the target rolling speed based on the type of target strip, the initial rolling temperature, and the target rolling temperature can be achieved in various ways. In some embodiments, a correspondence between the initial rolling temperature, the target rolling temperature, the type of strip, and the rolling speed can be pre-established, and the target rolling speed can be determined by looking up this correspondence. In other embodiments, a rolling speed determination model can be pre-established, with the input data being the initial rolling temperature, the target rolling temperature, and the type of strip, and the output data being the corresponding rolling speed.
[0047] In the embodiments of this specification, after obtaining the target rolling speed, the head of the target strip is rolled at the target rolling speed for a first distance. The first distance can be set according to actual needs. In some embodiments, the value of the first distance can be in the range of 5 to 15 m. After rolling the first distance, the rolling temperature of the target strip can be restored to the original rolling temperature to achieve a reduction in the rolling speed of the target strip.
[0048] In step S103, the impact of the strip head on the rolls is reduced by increasing the roll linear speed. In this embodiment, the roll linear speeds of the fifth rolling mill F5, the sixth rolling mill F6, and the seventh rolling mill F7 are adjusted to be higher than the bite speed of the target strip. Because the roll linear speed is higher than the bite speed of the target strip, the rolls will drive the target strip to move, thereby greatly reducing the impact of the strip head on the rolls. In some embodiments, the roll linear speeds of the fifth rolling mill, the sixth rolling mill, and the seventh rolling mill are controlled to be 0.5% to 1% higher than the bite speed.
[0049] It should be noted that the duration for which F1 to F7 operate at the adjusted roll linear speed is the first preset duration. The first preset duration can be 0.5s, 0.6s, etc., and those skilled in the art can set it according to actual needs. No limitation is made here.
[0050] In step S104, the impact of the strip head on the rolls can be reduced by increasing the rolling force to decrease the thickness of the target strip head. In this embodiment, the roll gaps of the fifth, sixth, and seventh mills can be increased in reverse to the target roll gap and maintained for a second preset duration. It should be noted that the target roll gap can be set according to actual needs. In some embodiments, the roll gaps of the fifth, sixth, and seventh mills can be increased in reverse by 5% to 10%, thereby increasing the bite gap of the target strip. Furthermore, the second preset duration can be set according to actual needs. In some embodiments, the second preset duration can be 0.5s, 0.6s, etc. After the second preset duration ends, the roll gaps of F5 to F7 are restored to their original planned rolling roll gap values for subsequent rolling.
[0051] In the embodiments described in this specification, only the impact compensation functions of F5 to F7 can be modified to increase the roll gap of F5 to F7 in reverse, without adjusting the roll gap of F1 to F4. It should be noted that, considering that after the rolls of F1 to F4 are damaged by the impact of the strip, the roll marks formed by the damaged rolls on the target strip are relatively light, and the roll marks caused by F1 to F4 can be eliminated by rolling of F5 to F7, therefore, only the roll gap of F5 to F7 can be adjusted, thereby saving system resources.
[0052] In this embodiment of the specification, in order to further reduce the head temperature of the target strip, the following steps may also be performed: control the inter-rack cooling water and dust suppression water to start after avoiding the head of the target strip by a second distance.
[0053] It should be noted that the second distance can be set according to actual needs. For example, the value range of the second distance can be 1 to 3m. In some embodiments, the cooling water and dust suppression water between the racks can be controlled to pass 3m past the head of the target strip, that is, to pass 3m past the head of the target strip before starting the cooling water and dust suppression water, thereby avoiding the temperature drop of the strip head caused by the cooling water and dust suppression water.
[0054] In the embodiments of this specification, in addition to cooling water and dust suppression water, the roller gap water can also be controlled. For example, the roller gap water can be controlled to pass the head of the target strip by a third distance. The third distance can be set according to actual needs, for example, the value range of the third distance can be 1 to 3 meters. In some embodiments, the roller gap water equipment is started 3 meters after the head of the strip has passed through the roller gap water equipment to avoid the cooling of the strip head caused by the roller gap water.
[0055] In the embodiments described in this specification, considering that the hot rolling production line also includes a descaling process for the strip, and since descaling is typically achieved by high-pressure water impact on the strip surface, descaling removes heat from the strip surface. To avoid the descaling process affecting the temperature of the target strip head, a fourth distance can be controlled to allow the descaling process to pass the strip head. This fourth distance can be set according to actual needs; for example, the value of the fourth distance can range from 0.5 to 1.5 m. In some embodiments, the descaling equipment starts 1 m after passing the target strip head.
[0056] It should be understood that material tracking can be performed through a primary system to control the descaling process, the inter-stand cooling water, the roll gap water, and the dust suppression water to allow a corresponding distance over the strip head. After the corresponding distance is allowed, the descaling operation, the inter-stand cooling water, the roll gap water, and the dust suppression water return to normal operating conditions.
[0057] In some embodiments, the shearing distance at the strip head can also be set. For example, before the strip reaches the descaling inlet, the flying shear automatically compensates for the increased cutting head size by 200-300mm on the HMI (Human-Machine Interface) screen. This allows the cooler portion of the strip head to be sheared off, while the warmer portion is retained.
[0058] In the embodiments of this specification, in order to achieve thermal equilibrium of the rolls before rolling high-carbon high-strength steel, a planned rolling order for the target strip can be specified in advance. Ordinary structural steel is scheduled to be produced before rolling the target strip, i.e., high-carbon high-strength steel, so that the rolls achieve thermal equilibrium when rolling ordinary structural steel.
[0059] In some embodiments, the planned rolling order corresponding to the target strip steel involves first rolling a preset quantity of ordinary structural steel, and then rolling the target strip steel. The preset quantity can be set according to actual needs; for example, the preset quantity ranges from 10 to 15 pieces. When rolling the preset quantity of ordinary structural steel, the steel output rhythm of the ordinary structural steel is determined to be less than or equal to a preset time interval, and the cooling water volume of the work rolls is adjusted to a target volume, which is less than the original cooling water volume of the work rolls.
[0060] Specifically, taking a preset quantity of 15 pieces as an example, the first 15 pieces of the rolling order are planned to be ordinary structural steel, such as cold-rolled material, Q235B and other ordinary structural steel. High carbon and high strength steel will be arranged after the 16th piece. Before rolling high carbon and high strength steel, the rolls will reach a thermal equilibrium state. The thermal equilibrium state can be that the rolls form an oxide film and the roll temperature and crown of the rolls remain stable.
[0061] The preset time interval can be selected according to actual needs, such as 130s, 120s, etc. Taking a preset time interval of 130s as an example, the tapping rhythm of the first 15 ordinary structural steel strips is kept below 130s. It should be noted that the tapping rhythm can be the time interval between rolling two strips of steel. Reducing the tapping time interval can effectively reduce heat loss from the rolls. Furthermore, while reducing the time interval, the embodiments in this specification also reduce the cooling water volume of the work rolls, which can more effectively reduce heat loss from the rolls.
[0062] It should be understood that the cooling water volume of the working roller can be adjusted to the target volume according to actual needs. For example, the target volume is to reduce the original volume by 20% to 35%, and in some embodiments, the target volume is to reduce the original volume by 30%.
[0063] In the embodiments of this specification, the working roll temperature can be increased to 70°C to 90°C by reducing the time interval between steel tapping and reducing the amount of cooling water in the working roll.
[0064] To better understand the methods provided in the embodiments of this specification, the rolling process of a high-carbon, high-strength steel is described below, in which the rolling parameters are modified as follows:
[0065] (1) Adjust the opening of the burner in the heating furnace to heat the head of the target strip so that the head temperature of the target strip is 10-20°C higher than the body temperature.
[0066] (2) Modify the material tracking of the primary system, so that the descaling water passes the head of the target strip by 0.5 to 1.5m, and the cooling water, roll gap water and dust suppression water between the frames pass the head of the target strip by 1 to 3m;
[0067] (3) Develop the strip head temperature control function of the first-level system so that the temperature of the target strip head 5-15m reaches 900-920℃, and then the temperature is returned to the original rolling temperature required by the target strip through the first-level temperature control.
[0068] Specifically, the target rolling speed can be calculated by the original rolling temperature of the target strip, the target rolling temperature (900-920℃), and the type of the target strip. The target rolling speed is greater than the original rolling speed of the target strip, and the strip head temperature is increased to reach the target rolling temperature by increasing the speed.
[0069] (4) Adjust the linear speed of rolls F5 to F7 to be 0.5 to 1.0% higher than the target strip bite speed;
[0070] (5) Modify the impact compensation function of F5 to F7. Increase the roll gap by 5% to 10% in the reverse direction of F5 to F7, increase the target strip biting into the roll gap, and the duration is 0.5s to increase the thickness of the head strip.
[0071] (6) Before the target strip reaches the descaling inlet, the flying shear automatically compensates and increases the cutting head by 200-300mm on the HMI screen;
[0072] (7) The first 15 rolls of the planned rolling order are mainly cold-rolled material, Q235B and other ordinary structural steels. High carbon and high strength steel, i.e., the target strip steel is arranged after the 16th roll. The rolls reach thermal equilibrium before rolling high carbon and high strength steel.
[0073] (8) The output rhythm of the first 15 cold-rolled materials and ordinary structural steel such as Q235B should be kept below 130s to minimize the interval time. At the same time, the cooling water volume of the working roll should be reduced by 30% to increase the working roll temperature to 70-90℃.
[0074] In summary, the solutions provided in the embodiments of this specification, by adjusting the head rolling process of the target strip in multiple aspects, can effectively increase the head temperature of the target strip, reduce the damage of the strip head to the rolls, reduce roll consumption, and improve the operating rate and output of the hot rolling production line.
[0075] Based on the same inventive concept, embodiments of this specification also provide a rolling apparatus for high-carbon, high-strength steel, such as... Figure 2 The device includes:
[0076] The flame adjustment module 201 is used to adjust the flame in the heating furnace used to heat the head of the target strip during the rolling of the target strip, so that the temperature of the head of the target strip is higher than the temperature of the body of the target strip, wherein the target strip is high-carbon high-strength steel;
[0077] The rolling speed adjustment module 202 is used to determine the target rolling speed based on the type of the target strip, the original rolling temperature and the target rolling temperature, and to roll the head of the target strip a first distance at the target rolling speed;
[0078] The first control module 203 is used to control the roll linear speed of the fifth, sixth and seventh rolling mills to be higher than the bite speed of the target strip and to maintain this for a first preset time.
[0079] The second control module 204 is used to control the roll gaps of the fifth rolling mill, the sixth rolling mill and the seventh rolling mill to increase in the opposite direction to the target roll gap and continue for a second preset time, so as to increase the bite-in roll gap of the target strip.
[0080] Regarding the above-mentioned apparatus, the specific implementation of each step has been described in detail in the embodiments of the high-carbon high-strength steel rolling method provided in the specification, and will not be elaborated here.
[0081] Based on the same inventive concept, embodiments of the present invention also provide a high-carbon, high-strength rolling system, such as... Figure 3 The method includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, it implements any of the above-described methods for rolling high-carbon and high-strength steel.
[0082] Among them, Figure 3 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.
[0083] Based on the same inventive concept, embodiments of this specification provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described high-carbon, high-strength steel rolling method.
[0084] Based on the same inventive concept, embodiments of this specification provide a computer program product, which includes a computer program. When the computer program is executed by a processor, it is used to load and execute the rolling method steps of the above-described high-carbon and high-strength steel.
[0085] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.
[0086] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.
[0087] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0088] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.
[0089] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.
Claims
1. A rolling method for high-carbon, high-strength steel, characterized in that, Applied to the hot rolling production line of the No. 7 rolling mill, including: During the rolling of the target strip, the flame in the heating furnace used to heat the head of the target strip is adjusted so that the temperature of the head of the target strip is higher than the temperature of the body of the target strip, wherein the target strip is high-carbon high-strength steel; Based on the type of the target strip, the original rolling temperature, and the target rolling temperature, a target rolling speed is determined, and a first distance is rolled at the head of the target strip at the target rolling speed. The roll linear speeds of the fifth, sixth, and seventh rolling mills are controlled to be higher than the bite speed of the target strip and maintained for a first preset duration. The roll gaps of the fifth, sixth, and seventh rolling mills are controlled to increase in the opposite direction to the target roll gap and continue for a second preset duration to increase the bite-in roll gap of the target strip.
2. The method as described in claim 1, characterized in that, The method further includes: The cooling water and dust suppression water between the control frames are activated after the target strip head has been cleared a second distance.
3. The method as described in claim 1, characterized in that, The planned rolling order corresponding to the target strip steel involves first rolling a preset quantity of ordinary structural steel, and then rolling the target strip steel. The method further includes: When rolling the preset quantity of ordinary structural steel, the steel output rhythm of the ordinary structural steel is determined to be less than or equal to the preset time interval, and the cooling water volume of the work roll is adjusted to the target water volume, which is less than the original water volume of the cooling water of the work roll.
4. The method as described in claim 3, characterized in that, The preset quantity ranges from 10 to 15 pieces.
5. The method as described in claim 1, characterized in that, The adjustment of the flame in the heating furnace used to heat the head of the target strip includes: The opening of the burner used to heat the head of the target strip is increased to a target opening, so that the temperature of the head of the target strip is 10-20°C higher than the temperature of the body of the target strip, wherein the target opening is greater than the original opening of the burner.
6. The method as described in claim 1, characterized in that, The original rolling temperature is greater than or equal to 890°C and less than 900°C, and the target rolling temperature is greater than or equal to 900°C and less than or equal to 920°C.
7. The method as described in claim 1, characterized in that, The control of the roll linear speed of the fifth, sixth, and seventh rolling mills to be higher than the bite speed of the target strip and to maintain this for a first preset duration includes: The roll linear speed of the fifth, sixth, and seventh rolling mills is controlled to be 0.5% to 1% higher than the bite speed.
8. The method as described in claim 1, characterized in that, The control of the roll gap of the fifth, sixth, and seventh rolling mills to increase in the opposite direction to the target roll gap and continue for a second preset duration includes: The roll gap of the fifth, sixth, and seventh rolling mills is increased in the opposite direction by 5% to 10%.
9. A rolling system for high-carbon, high-strength steel, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in any one of claims 1-8.
10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-8.