CN116748313A - Temperature control method for hot-rolled thick-specification wheel steel - Google Patents
Temperature control method for hot-rolled thick-specification wheel steel Download PDFInfo
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- CN116748313A CN116748313A CN202310642346.0A CN202310642346A CN116748313A CN 116748313 A CN116748313 A CN 116748313A CN 202310642346 A CN202310642346 A CN 202310642346A CN 116748313 A CN116748313 A CN 116748313A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 266
- 239000010959 steel Substances 0.000 title claims abstract description 266
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 114
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 230000001133 acceleration Effects 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010079 rubber tapping Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000013178 mathematical model Methods 0.000 claims description 12
- 239000002436 steel type Substances 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000013499 data model Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000002068 genetic effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000000195 production control method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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Abstract
The invention relates to a temperature control method for hot-rolled thick-specification wheel steel, and belongs to the technical field of hot continuous rolling plate production methods. The technical scheme of the invention is as follows: fixing steel grades of the wheel steel series in SGP model table, and separately controlling steel grades similar to chemical components; calling an independent model table in the independently set steel family to set threading speed, inter-frame cooling water configuration mode and acceleration control parameters; the cooling water between the machine development frames sprays codes independently. The beneficial effects of the invention are as follows: the mutual interference of genetic parameters among different steel grades in the same steel family can be effectively avoided, the high-speed rolling of the wheel steel is realized to reduce the generation of oxide scales, the high-speed rolling and quick spraying technology of the wheel steel is realized on the basis of not influencing the control of other steel grades, the control of the final rolling temperature of the wheel steel in a target value range is ensured, and the product performance meets the process requirements; the system automatically identifies and calls the related parameter table when rolling the wheel steel without manual intervention, and the automatic operation is faster and more reliable.
Description
Technical Field
The invention relates to a temperature control method for hot-rolled thick-specification wheel steel, and belongs to the technical field of hot continuous rolling plate production methods.
Background
The hot rolled wheel steel is applied to rims and spokes of wheels, the surface quality of polished clean strip steel is extremely important to the forming process of a finished product of a wheel structure product, the pit defect on the surface of the wheel product cannot be eliminated before and after paint spraying, the appearance quality of the product is seriously affected, the image of a user product is improved and promoted, and the market share of the wheel steel product is extremely unfavorable. The research shows that the pits and pits on the surface of the hot rolled strip steel are mainly related to the press-in of the three-time oxide scales formed in the finish rolling area. The rough roll surface of the strip steel is easy to occur in the hot rolling and finish rolling process, so that the oxidized iron sheet on the surface of the strip steel is broken and pressed into the surface of the strip steel to form pits and pitting defects, and pit defects are formed on the surface of the strip steel after pickling. The high-pressure water descaling system before finish rolling in hot rolling production uses 290bar of high-pressure water to sweep the surface of the strip steel, and the system can sweep the iron scales generated by the strip steel in a delay roller way area, but a large amount of iron scales are generated in the rolling process of a finishing mill. The original wheel steel production control method is consistent with the conventional steel grade, a finish rolling setting model (FSU model) sets the threading speed of a finishing mill according to the thickness of strip steel, the target finish rolling temperature (FDT) and the like, the threading speed of the wheel steel with the thickness of more than 12.7mm and the common steel grade are both about 2m/s, the threading speed is slower, and meanwhile, the small acceleration is set for guaranteeing the coiling temperature control stability of the thick strip steel; after the finish rolling temperature control model (FDTC model) receives a set value of the strip threading speed of the finish rolling setting model (FSU model), calculating the cooling water quantity between the finishing mill frames required to be opened according to the target finish rolling temperature (FDT), and adjusting the cooling water quantity in the strip rolling process to obtain the target finish rolling temperature required by the process. Because the finish rolling setting model (FSU model) sets the threading speed of the wheel steel with the thickness of 12.7mm and above, the cooling water quantity between the frames required by calculation is low, the Si content of the chemical element of the wheel steel is high, and the strip steel is easy to produce iron oxide scale which is difficult to remove again during the rolling of the finishing mill according to the small rolling speed and the low cooling water quantity. In actual production, in order to reduce the production of scale in a finish rolling area, high-speed rolling is applied to wheel steel, the finish rolling setting models (FSU models) are mutually interfered when setting different steel grade control parameters, calculated threading speed deviation is large, and the final rolling temperature and coiling temperature are more deviated from target values, so that the performance of the wheel steel product is unstable.
Disclosure of Invention
The invention aims to provide a temperature control method for hot-rolled thick-specification wheel steel, which is characterized in that the number of a steel group of a wheel steel series is fixed in an SGP model table, and the steel group is controlled separately from the steel with similar chemical components, so that the mutual interference of genetic parameters among different steel groups in the same steel group can be effectively avoided; the method comprises the steps that an independent model table is called in a steel family which is set independently to set a large number of control parameters such as threading speed, inter-frame cooling water configuration mode and acceleration, so that high-speed rolling of wheel steel is realized to reduce generation of iron oxide scale; the development of the independent spraying codes of the cooling water between the frames realizes the high-speed rolling and rapid spraying technology of the wheel steel on the basis of not influencing the control of other steel types, ensures the final rolling temperature (FDT) of the wheel steel to be controlled within a target value range, and ensures that the product performance meets the process requirement; the system automatically identifies and calls the related parameter table when the wheel steel is rolled without manual intervention before and during the rolling process of the wheel steel, and the automatic operation is faster and more reliable, thereby effectively solving the problems in the prior art.
The technical scheme of the invention is as follows: a temperature control method for hot-rolled thick-gauge wheel steel comprises the following steps:
(1) Setting the steel family of the wheel steel series in a secondary number model table, wherein the secondary number model does not calculate the steel family number according to the chemical components of the wheel steel after receiving the three-level PDI rolling information of the strip steel;
(2) Setting larger threading speeds for strip steel with different thickness specifications on a mathematical model table of corresponding steel families of wheel steel, and reducing the range of the maximum threading speed interval and the minimum threading speed interval;
(3) Independently setting a spray code of cooling water spray among frames of the wheel steel series steel grades in a finish rolling temperature control model; setting control intervals of the cooling water quantity among six frames in the cooling water spraying codes among frames corresponding to the wheel steel so as to adapt to high-speed rolling of the wheel steel;
(4) Different maximum accelerations are set for wheel steels with different thicknesses, smaller accelerations are set for wheel steel thick products, and larger fluctuation of speed is avoided so as to realize good control of strip steel coiling temperature;
(5) Because the wheel steel threading speed is high, in order to ensure that the final rolling temperature of the strip steel is controlled within the target value range, the tapping temperature of the wheel steel series products is required to be lower than that of the conventional products, and when the low-temperature tapping of the heating furnace is difficult to realize, the plate blank needs to be rolled at a finish rolling inlet area.
In the step (1), steel groups of wheel steel series steel grades with different brands are set in a secondary data model table SGP, and wheel steels needing high-speed rolling are set to the same steel group; after the mathematical model receives wheel steel rolling information issued by three-stage PDI, the mathematical model directly collects model set values without receiving steel family numbers calculated according to the chemical components of strip steel, and the model parameter tables in the finish rolling set model, the finish rolling temperature control model and the coiling temperature control model are called by the set steel family numbers.
In the step (2), different setting is carried out on a threading speed model table FSU1812_FmThreadingspeed of a wheel steel family in a finish rolling setting model according to a thickness interval; the threading speed of the wheel steel series steel grades with the same thickness specification is set higher than that of the conventional steel grades so as to reduce the generation of iron scales; the threading speed model table is divided into 28 thickness setting sections according to the target thickness of the strip steel, 10 width setting sections according to the target width, and the threading speeds corresponding to different thickness and width specifications are correspondingly set according to requirements in the model table.
In the step (3), developing a separate cooling code 14 in the finish rolling setting model for controlling the finish rolling temperature of the wheel steel; setting spray codes of the steel groups of the wheel steel series and the strip steel in the FSU1804_FmSprayPattern model table, adding a cooling code 14 in the FSU1805_FmSprays, setting all cooling water among six finishing mill frames in the code 14 to be opened, and setting larger flow for cooling the strip steel; the setting of the cooling water quantity in the code is larger than that of the conventional steel grade so as to adapt to the control of the temperature during the high-speed rolling of the wheel steel.
In the step (4), setting the acceleration speed in the rolling process of the wheel steel strip steel in a final rolling temperature control model; the maximum acceleration of the wheel steel is limited in the FTPRP model table, and the wheel steel thick product is set to be rolled by a high-speed threading technology, so that the small acceleration is set for the wheel steel series steel grade, and the condition that the finishing temperature is too high and the coiling temperature is fluctuated due to the fact that the strip speed is too high in the rolling process is avoided.
In the step (5), since the wheel steel is required to be rolled in a high-speed threading way in a finish rolling area, when the cooling water quantity among 6 racks is fully opened to 100% in the finish rolling machine, the final rolling temperature of the strip steel is still higher than a target value, and therefore, compared with the conventional steel, the heating furnace is required to control the tapping temperature of the wheel steel slab to be lower; when the mixed heating of multiple steel types in the same heating furnace cannot realize the control of multiple target values, the wheel steel plate blank is required to be heated to a proper temperature in a finish rolling inlet area so as to roll in a finish rolling area.
The beneficial effects of the invention are as follows: the number of the steel type of the wheel steel series is fixed in the SGP model table, and the steel types similar to the chemical components are controlled separately, so that the mutual interference of genetic parameters among different steel types in the same steel type can be effectively avoided; the method comprises the steps that an independent model table is called in a steel family which is set independently to set a large number of control parameters such as threading speed, inter-frame cooling water configuration mode and acceleration, so that high-speed rolling of wheel steel is realized to reduce generation of iron oxide scale; the development of the independent spraying codes of the cooling water between the frames realizes the high-speed rolling and rapid spraying technology of the wheel steel on the basis of not influencing the control of other steel types, ensures the final rolling temperature (FDT) of the wheel steel to be controlled within a target value range, and ensures that the product performance meets the process requirement; the system automatically identifies and calls the related parameter table when the wheel steel is rolled without manual intervention before and during the rolling process of the wheel steel, and the automatic operation is faster and more reliable.
Drawings
Fig. 1 is a flow chart of the operation of the present invention.
Description of the embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments, and it is apparent that the described embodiments are a small part of the embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
A temperature control method for hot-rolled thick-gauge wheel steel comprises the following steps:
(1) Setting the steel family of the wheel steel series in a secondary number model table, wherein the secondary number model does not calculate the steel family number according to the chemical components of the wheel steel after receiving the three-level PDI rolling information of the strip steel;
(2) Setting larger threading speeds for strip steel with different thickness specifications on a mathematical model table of corresponding steel families of wheel steel, and reducing the range of the maximum threading speed interval and the minimum threading speed interval;
(3) Independently setting a spray code of cooling water spray among frames of the wheel steel series steel grades in a finish rolling temperature control model; setting control intervals of the cooling water quantity among six frames in the cooling water spraying codes among frames corresponding to the wheel steel so as to adapt to high-speed rolling of the wheel steel;
(4) Different maximum accelerations are set for wheel steels with different thicknesses, smaller accelerations are set for wheel steel thick products, and larger fluctuation of speed is avoided so as to realize good control of strip steel coiling temperature;
(5) Because the wheel steel threading speed is high, in order to ensure that the final rolling temperature of the strip steel is controlled within the target value range, the tapping temperature of the wheel steel series products is required to be lower than that of the conventional products, and when the low-temperature tapping of the heating furnace is difficult to realize, the plate blank needs to be rolled at a finish rolling inlet area.
In the step (1), steel groups of wheel steel series steel grades with different brands are set in a secondary data model table SGP, and wheel steels needing high-speed rolling are set to the same steel group; after the mathematical model receives wheel steel rolling information issued by three-stage PDI, the mathematical model directly collects model set values without receiving steel family numbers calculated according to the chemical components of strip steel, and the model parameter tables in the finish rolling set model, the finish rolling temperature control model and the coiling temperature control model are called by the set steel family numbers.
In the step (2), different setting is carried out on a threading speed model table FSU1812_FmThreadingspeed of a wheel steel family in a finish rolling setting model according to a thickness interval; the threading speed of the wheel steel series steel grades with the same thickness specification is set higher than that of the conventional steel grades so as to reduce the generation of iron scales; the threading speed model table is divided into 28 thickness setting sections according to the target thickness of the strip steel, 10 width setting sections according to the target width, and the threading speeds corresponding to different thickness and width specifications are correspondingly set according to requirements in the model table.
In the step (3), developing a separate cooling code 14 in the finish rolling setting model for controlling the finish rolling temperature of the wheel steel; setting spray codes of the steel groups of the wheel steel series and the strip steel in the FSU1804_FmSprayPattern model table, adding a cooling code 14 in the FSU1805_FmSprays, setting all cooling water among six finishing mill frames in the code 14 to be opened, and setting larger flow for cooling the strip steel; the setting of the cooling water quantity in the code is larger than that of the conventional steel grade so as to adapt to the control of the temperature during the high-speed rolling of the wheel steel.
In the step (4), setting the acceleration speed in the rolling process of the wheel steel strip steel in a final rolling temperature control model; the maximum acceleration of the wheel steel is limited in the FTPRP model table, and the wheel steel thick product is set to be rolled by a high-speed threading technology, so that the small acceleration is set for the wheel steel series steel grade, and the condition that the finishing temperature is too high and the coiling temperature is fluctuated due to the fact that the strip speed is too high in the rolling process is avoided.
In the step (5), since the wheel steel is required to be rolled in a high-speed threading way in a finish rolling area, when the cooling water quantity among 6 racks is fully opened to 100% in the finish rolling machine, the final rolling temperature of the strip steel is still higher than a target value, and therefore, compared with the conventional steel, the heating furnace is required to control the tapping temperature of the wheel steel slab to be lower; when the mixed heating of multiple steel types in the same heating furnace cannot realize the control of multiple target values, the wheel steel plate blank is required to be heated to a proper temperature in a finish rolling inlet area so as to roll in a finish rolling area.
In practical application, the invention is realized by adding control functions into a finish rolling setting model (FSU model) and a finish rolling temperature control model (FDTC model), and comprises the following technical processes:
1. the hot rolled wheel steel is divided into dozens of grades such as HZ330CL, HZ380CL, HZ400CL, HZ420CL, HZ590CL and the like according to different performance requirements, the corresponding steel grade codes grdIdx of different steel grade grades in a hot rolling mathematical model are different, the steel family numbers family corresponding to the steel grade codes of the wheel steel system in the original SGP model table are all 0, namely, the steel grades of the steel grades are all calculated according to the component content of the slab chemical elements, and the chemical components of all elements in actual rolling can cause the difference of the steel families. In the SGP model table, the steel family of the wheel steel grade is set to be 30 or other steel family grade more than 30, and the mathematical model automatically calculates the first 25 steel families according to the chemical composition of the plate blank, so that the condition that the wheel steel series steel grade is set to be 30 does not cause the condition that the wheel steel series steel grade is in the same steel family as other steel grades, and the model can realize independent control of the wheel steel series steel grade.
2. The maximum, minimum and optimum values of the threading speed of steel family 30 are set in the fsu1812_fmthreadspeed parameter table. Taking strip steel with the thickness of 14-16mm as an example, setting the optimal threading speed of 3.8m/s, the minimum threading speed of 3.8m/s and the maximum threading speed of 4 m/s in a model table so as to realize high-speed rolling of wheel steel, and avoiding abnormal control of final rolling temperature (FDT) and Coiling Temperature (CT) caused by large fluctuation of threading speeds of wheel steel in different batches. The strip steel with different thickness specifications has different strip threading speeds, and the strip threading speeds are different when the difference of the finish rolling temperatures (FDT) is large. When different values are required to be set for the threading speeds of wheel steels with different brands within the same thickness interval if the technological parameter difference of the wheel steels with different brands is larger, the steel family numbers can be set for the single wheel steel series steel types independently as in the step 1, and the corresponding model parameter table is called to realize the independent control of the individual brands.
3. The code 14 is developed in the FSU1805_FmSprays model table ISC as a cooling water spray code among the steel frames of the wheel steel series, the water quantity of six cooling water among the frames (ISC) is set in the code 14, and the minimum value of the cooling water quantity among the six frames is set to be 80 percent and the maximum water quantity is set to be 100 percent because the threading speed of the wheel steel is higher and the water quantity of the cooling water needed in the rolling process is also higher; the serial numbers of the cooling water priority adjustment among six frames in the rolling process are set, the ISC5 and the ISC6 are applied to the final rolling temperature (FDT) feedback control, and the ISC1-ISC4 are applied to the feedforward control. In the FSU1804_FmSprayPattern model table steel group 30, a cooling code 14 is set as a spray code of the final rolling temperature (FDT) of the wheel steel, and other cooling codes can be flexibly developed in different thickness codes and width codes according to the difference of the temperature control of the strip steel with different thickness, and the required water quantity is set for cooling spray.
4. The strip acceleration of steel family 30 is set in the final rolling temperature control model (FDTC model) FTPRP model table. The calculation formula of the cooling water section number of the layer cold water area is a static mathematical model under ideal conditions, and among factors influencing the cooling strength of strip steel, the strip steel speed is most active, and certain deviation occurs in the setting of a CTC model due to the large change of the same strip steel speed. In the high-speed rolling process of the wheel steel, acceleration is set to be smaller in order to avoid fluctuation of the Coiling Temperature (CT) of the wheel steel. Acceleration of wheel steel with thickness of more than 12.7mm is set to be 0.003m/s 2 The other thinner strips can be set as followsAt 0.01-0.001 m/s 2 The value can be adjusted slightly according to the actual control condition of the taking temperature of the wheel steel coil in production. Wheel steel acceleration of other thickness specifications can be set differently to meet control requirements of finish rolling temperature (FDT) and Coiling Temperature (CT).
5. In order to achieve high speed rolling of wheel steels while avoiding finishing temperatures (FDT) above target values, it is required that the tapping temperature of the wheel steel grade series be lower than conventional grades. Different brands and different thickness target values have certain difference, the tapping temperature of the HZ380CL is 1180 ℃, the tapping temperature of the HZ540CL is 1220 ℃, and other brands and different thickness specifications are set with different tapping temperatures according to the process requirements. When the mixed heating of multiple steel types in the same heating furnace can not realize the control of multiple target values, the wheel steel plate blank is required to be heated in a finish rolling inlet area, and when the finish rolling inlet pyrometer detects the temperature of the strip steel to be about 980 ℃, the finishing mill allows the strip steel to enter. Through analysis of a large amount of rolling data, the high-speed rolling of wheel steel can be realized at 980 ℃ inlet temperature, and the final rolling temperature (FDT) can be controlled within a target value range through larger water spray of more than 80% of cooling water between the frames of a finishing mill.
Claims (6)
1. The temperature control method for the hot-rolled thick-gauge wheel steel is characterized by comprising the following steps of:
(1) Setting the steel family of the wheel steel series in a secondary number model table, wherein the secondary number model does not calculate the steel family number according to the chemical components of the wheel steel after receiving the three-level PDI rolling information of the strip steel;
(2) Setting larger threading speeds for strip steel with different thickness specifications on a mathematical model table of corresponding steel families of wheel steel, and reducing the range of the maximum threading speed interval and the minimum threading speed interval;
(3) Independently setting a spray code of cooling water spray among frames of the wheel steel series steel grades in a finish rolling temperature control model; setting control intervals of the cooling water quantity among six frames in the cooling water spraying codes among frames corresponding to the wheel steel so as to adapt to high-speed rolling of the wheel steel;
(4) Different maximum accelerations are set for wheel steels with different thicknesses, smaller accelerations are set for wheel steel thick products, and larger fluctuation of speed is avoided so as to realize good control of strip steel coiling temperature;
(5) Because the wheel steel threading speed is high, in order to ensure that the final rolling temperature of the strip steel is controlled within the target value range, the tapping temperature of the wheel steel series products is required to be lower than that of the conventional products, and when the low-temperature tapping of the heating furnace is difficult to realize, the plate blank needs to be rolled at a finish rolling inlet area.
2. The method for controlling the temperature of hot rolled thick gauge wheel steel according to claim 1, wherein: in the step (1), steel groups of wheel steel series steel grades with different brands are set in a secondary data model table SGP, and wheel steels needing high-speed rolling are set to the same steel group; after the mathematical model receives wheel steel rolling information issued by three-stage PDI, the mathematical model directly collects model set values without receiving steel family numbers calculated according to the chemical components of strip steel, and the model parameter tables in the finish rolling set model, the finish rolling temperature control model and the coiling temperature control model are called by the set steel family numbers.
3. The method for controlling the temperature of hot rolled thick gauge wheel steel according to claim 1, wherein: in the step (2), different setting is carried out on a threading speed model table FSU1812_FmThreadingspeed of a wheel steel family in a finish rolling setting model according to a thickness interval; the threading speed of the wheel steel series steel grades with the same thickness specification is set higher than that of the conventional steel grades so as to reduce the generation of iron scales; the threading speed model table is divided into 28 thickness setting sections according to the target thickness of the strip steel, 10 width setting sections according to the target width, and the threading speeds corresponding to different thickness and width specifications are correspondingly set according to requirements in the model table.
4. The method for controlling the temperature of hot rolled thick gauge wheel steel according to claim 1, wherein: in the step (3), developing a separate cooling code 14 in the finish rolling setting model for controlling the finish rolling temperature of the wheel steel; setting spray codes of the steel groups of the wheel steel series and the strip steel in the FSU1804_FmSprayPattern model table, adding a cooling code 14 in the FSU1805_FmSprays, setting all cooling water among six finishing mill frames in the code 14 to be opened, and setting larger flow for cooling the strip steel; the setting of the cooling water quantity in the code is larger than that of the conventional steel grade so as to adapt to the control of the temperature during the high-speed rolling of the wheel steel.
5. The method for controlling the temperature of hot rolled thick gauge wheel steel according to claim 1, wherein: in the step (4), setting the acceleration speed in the rolling process of the wheel steel strip steel in a final rolling temperature control model; the maximum acceleration of the wheel steel is limited in the FTPRP model table, and the wheel steel thick product is set to be rolled by a high-speed threading technology, so that the small acceleration is set for the wheel steel series steel grade, and the condition that the finishing temperature is too high and the coiling temperature is fluctuated due to the fact that the strip speed is too high in the rolling process is avoided.
6. The method for controlling the temperature of hot rolled thick gauge wheel steel according to claim 1, wherein: in the step (5), since the wheel steel is required to be rolled in a high-speed threading way in a finish rolling area, when the cooling water quantity among 6 racks is fully opened to 100% in the finish rolling machine, the final rolling temperature of the strip steel is still higher than a target value, and therefore, compared with the conventional steel, the heating furnace is required to control the tapping temperature of the wheel steel slab to be lower; when the mixed heating of multiple steel types in the same heating furnace cannot realize the control of multiple target values, the wheel steel plate blank is required to be heated to a proper temperature in a finish rolling inlet area so as to roll in a finish rolling area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310642346.0A CN116748313A (en) | 2023-06-01 | 2023-06-01 | Temperature control method for hot-rolled thick-specification wheel steel |
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| CN202310642346.0A CN116748313A (en) | 2023-06-01 | 2023-06-01 | Temperature control method for hot-rolled thick-specification wheel steel |
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