CN112264594A - Control method for improving control precision of opening degree under soft press of continuous casting fan-shaped section - Google Patents
Control method for improving control precision of opening degree under soft press of continuous casting fan-shaped section Download PDFInfo
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- CN112264594A CN112264594A CN202010878673.2A CN202010878673A CN112264594A CN 112264594 A CN112264594 A CN 112264594A CN 202010878673 A CN202010878673 A CN 202010878673A CN 112264594 A CN112264594 A CN 112264594A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
Abstract
The invention relates to a control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction, belonging to the technical field of steelmaking and continuous casting. The technical scheme of the invention is as follows: the method comprises the steps of carrying out online real-time detection and calibration on a roll gap of a bending section of a casting machine, optimizing and adjusting the pressure of a hydraulic system of a sector section, regularly and timely replacing a clamping cylinder of the sector section with high working strength, carrying out steel grade group division aiming at high-strength and high-hardness steel grades, optimizing the soft reduction amount and the reduction mode of the sector section, and dynamically adjusting the soft reduction sector section to enable the tail end of a solidified liquid core of a casting blank to be uniformly solidified and shrunk. The invention has the beneficial effects that: ensuring the opening degree precision of the soft reduction position of the fan-shaped section of the continuous casting machine; the problems of interdendritic segregation, bulging of casting blank, internal cracking and even delamination caused by poor soft reduction of the sector section are solved; the bottleneck that the conventional fan-shaped section can only be subjected to speed reduction and observation when the pressure is not in place is broken, and very obvious effects on the aspects of smooth production and improvement of the quality of a casting blank are achieved.
Description
Technical Field
The invention relates to a control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction, belonging to the technical field of steelmaking and continuous casting.
Background
Since the time of production of a Daneli slab continuous casting machine is up to 2008, the continuous casting machine has been operated for 12 years, the operation rate of the casting machine is high due to long-time operation of the continuous casting machine, and in addition, the equipment structure is complex, the working condition is poor, the operation condition of the sector section is not ideal, the continuous casting production rhythm is influenced, the quality of a continuous casting blank is influenced to different degrees, and the serious economic loss is caused to a company.
In actual production, the problem of deviation between an actual roll gap value and a target value occurs after the segment of the casting machine is operated on the line for a period of time, and particularly the problem that the roll gap of the segment is larger than the set target deviation when the solidification tail end is slightly pressed when a steel grade with a large section, high strength and high hardness is produced is particularly prominent.
After a period of time, the casting blanks for actually producing high-strength pipeline steel, crossbeam steel and wear-resistant steel sometimes have internal cracks near a triangular area through low-power detection, the proportion of the occurrence of the central segregation grade above C class 1.5 is increased, and the impact performance of rolled products is increased in an disproportionate proportion. Solutions therefor are urgently needed.
At present, the phenomenon that the section of a specific steel grade and a section with a characteristic size cannot be pressed to a certain position generally exists, and the number of the bent sections and the solidified tail ends of casting blanks is the largest. In the process of solidification and shrinkage of a casting blank, the casting blank is mainly restricted by a roller surface and a roller gap of a sector section, and the accuracy of the roller surface and the roller gap of the sector section directly causes serious quality problems of casting blank segregation, internal crack and the like.
Disclosure of Invention
The invention aims to provide a control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction, which fully plays the role of a dynamic soft reduction process, obviously lightens the center segregation of a continuous casting billet, eliminates internal cracks near a triangular area, improves the internal quality of a high-strength steel plate blank, effectively improves the accuracy that the fan-shaped section of a casting machine is not pressed in place, the fan-shaped section of the casting machine is normally pressed down, and the opening degree deviation of the fan-shaped section at the solidification tail end of the casting blank under dynamic soft reduction is within 0.1 mm; the effective control of the in-place pressing of the sector section is realized, the quality of the ultra-high strength steel product is effectively ensured, the segregation of the plate blank reaches the level above C0.5, the unqualified power of impact caused by the segregation is reduced to below 0.1 per thousand, and the problems in the background art are effectively solved.
The technical scheme of the invention is as follows: a control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction comprises the following steps:
(1) the inspection and replacement period of the clamping cylinder of the sector section is improved, the original 7-day inspection and replacement is changed into 3-day inspection and replacement, and the situation that the sector section is not in place due to insufficient pressure relief force in the hydraulic cylinder is avoided;
(2) the pressure of the hydraulic system of the segment is increased from 155-175bar to 180-205bar, and the pressure fluctuation range is controlled between 185-195 bar, so that the segment pressure is realized to the target position on the power level;
(3) the roll gap of the casting machine is measured and calibrated on line, so that the deviation of the sector section after being put into service for a period of time on line is avoided, and the control precision of the roll gap is ensured to be within +/-0.1 mm;
(4) dividing a steel group, a pouring section and a corresponding pulling speed, making a matching table of a sector section in-place pressing section, a steel type and the pulling speed, adjusting the pulling speed according to different steel types and different sections, and ensuring that the position control of the solidification tail end of a casting blank under a soft reduction condition is normal;
(5) the continuous drawing furnace number, the direct-charging hot conveying and different process routes are matched, the production rhythm is optimized according to the contract conditions of the process routes and the direct-charging direct conveying, the proper temperature is controlled, the constant drawing speed production is ensured, and the phenomenon that the variation of the drawing speed causes the variation of the soft reduction position of the sector section to aggravate the dendrite segregation at the tail end of the liquid core of the casting blank is avoided.
In the step (3), the concrete steps are as follows:
firstly, adjusting the movable side of the sector section to a mechanical position, and measuring four roll gap values at specified positions on two sides of a roll by using a hand-held roll gap instrument;
secondly, inputting the measured roll gap value into position sensors of four oil cylinders for controlling the opening degree of the sector section, and calibrating the mechanical position to be 0 bit;
thirdly, after calibration is finished, adjusting the roll gap of the sector section to a roll gap value which is 230mm, 235mm, 240mm or 245mm and reasonably accords with actual production, observing that the clamping cylinder acts normally without blocking on site, measuring again at the same specified position by using a handheld roll gap instrument, and finishing calibration when the error between an actual measured value and the reading value of the sensor is within +/-0.02 mm;
and fourthly, when the error between the actual measured value and the reading of the hydraulic cylinder position sensor exceeds +/-0.02 mm, modifying the compensation value, and repeating the steps of the first step and the second step until the roll gap is adjusted to be within the error range.
The thickness of the plate blank is 230-250 mm, four fan-shaped sections are dynamically and lightly pressed at the solidification tail end, the total pressing amount is 6-8 mm, and the pressing amount of a single fan-shaped section is 1.5-2.0 mm.
The invention has the beneficial effects that: the function of the dynamic soft reduction process is fully exerted, the center segregation of the continuous casting billet is remarkably reduced, internal cracks near a triangular area are eliminated, the internal quality of the high-strength steel plate blank is improved, the accuracy that the fan-shaped section of the casting machine is not pressed in place is effectively improved, the fan-shaped section is normally pressed at the position of the fan-shaped section of the casting machine, and the opening degree deviation of the fan-shaped section is within 0.1mm under the dynamic soft reduction at the solidification tail end of the casting blank; the effective control of the in-place pressing of the sector section is realized, the quality of the ultra-high strength steel product is effectively ensured, the segregation of the plate blank reaches the level above C0.5, and the failure rate of impact power caused by the segregation is reduced to below 0.1 per thousand.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the following will describe the technical solutions of the embodiments of the present invention clearly, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
A control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction comprises the following steps:
(1) the inspection and replacement period of the clamping cylinder of the sector section is improved, the original 7-day inspection and replacement is changed into 3-day inspection and replacement, and the situation that the sector section is not in place due to insufficient pressure relief force in the hydraulic cylinder is avoided;
(2) the pressure of the hydraulic system of the segment is increased from 155-175bar to 180-205bar, and the pressure fluctuation range is controlled between 185-195 bar, so that the segment pressure is realized to the target position on the power level;
(3) the roll gap of the casting machine is measured and calibrated on line, so that the deviation of the sector section after being put into service for a period of time on line is avoided, and the control precision of the roll gap is ensured to be within +/-0.1 mm;
(4) dividing a steel group, a pouring section and a corresponding pulling speed, making a matching table of a sector section in-place pressing section, a steel type and the pulling speed, adjusting the pulling speed according to different steel types and different sections, and ensuring that the position control of the solidification tail end of a casting blank under a soft reduction condition is normal;
(5) the continuous drawing furnace number, the direct-charging hot conveying and different process routes are matched, the production rhythm is optimized according to the contract conditions of the process routes and the direct-charging direct conveying, the proper temperature is controlled, the constant drawing speed production is ensured, and the phenomenon that the variation of the drawing speed causes the variation of the soft reduction position of the sector section to aggravate the dendrite segregation at the tail end of the liquid core of the casting blank is avoided.
In the step (3), the concrete steps are as follows:
firstly, adjusting the movable side of the sector section to a mechanical position, and measuring four roll gap values at specified positions on two sides of a roll by using a hand-held roll gap instrument;
secondly, inputting the measured roll gap value into position sensors of four oil cylinders for controlling the opening degree of the sector section, and calibrating the mechanical position to be 0 bit;
thirdly, after calibration is finished, adjusting the roll gap of the sector section to a roll gap value which is 230mm, 235mm, 240mm or 245mm and reasonably accords with actual production, observing that the clamping cylinder acts normally without blocking on site, measuring again at the same specified position by using a handheld roll gap instrument, and finishing calibration when the error between an actual measured value and the reading value of the sensor is within +/-0.02 mm;
and fourthly, when the error between the actual measured value and the reading of the hydraulic cylinder position sensor exceeds +/-0.02 mm, modifying the compensation value, and repeating the steps of the first step and the second step until the roll gap is adjusted to be within the error range.
The thickness of the plate blank is 230-250 mm, four fan-shaped sections are dynamically and lightly pressed at the solidification tail end, the total pressing amount is 6-8 mm, and the pressing amount of a single fan-shaped section is 1.5-2.0 mm.
Example 1: 700L of high-strength beam steel is produced, the section is 1700-2000 mm, statistical analysis is carried out on the control condition of the sector section in the continuous casting process, the phenomenon of internal leakage of a clamping cylinder of the sector section of the casting machine is found, the pressure of a hydraulic system is low, the pulling speed is 0.9-1.0m/min, the cooling specific water amount is 0.72L/kg, at the moment, the continuous casting roll gap is in a fluctuation state with a deviation larger than a target value and a roll gap value of 0-3 mm in the continuous casting pouring process, a middle crack exists near a triangular zone after the casting blank is detected by a low power, and the corresponding center segregation is aggravated. Therefore, in order to ensure that the reduction control precision of the fan-shaped section of the casting machine is within +/-0.1 mm, the center segregation is reduced, the triangular region cracks are eliminated, continuous casting equipment and a process improvement system are formulated as shown in table 1, and the embodiment is as follows: checking and replacing a sector hydraulic cylinder before delivery, and adjusting the system pressure to 180-195 bar; secondly, measuring and calibrating the sector section on line to ensure that the measurement error after calibration is within 0.02 mm; thirdly, making a section-pulling speed corresponding scheme and adopting a secondary cooling and weak cooling mode; and fourthly, controlling the whole process to ensure that the superheat degree of the continuous casting tundish is 10-20 ℃. Tracking historical data of a roll gap of a sector section under dynamic soft reduction in a casting blank production process, wherein the roll gap control precision is 0-0.1 mm. Eliminates the cracks in the triangular area, lightens the center segregation and has good effect.
TABLE 1 continuous casting plant, Process parameters
Example 2: the method is used for producing high-grade pipeline steel X70, the section is 1700-2000 mm, in order to guarantee normal equipment guarantee conditions under light pressure, the pressure of a hydraulic system is calibrated and adjusted strictly according to sector online inspection and measurement, the deviation of a calibrated roll gap is guaranteed to be within 0.02mm, the production rhythm is strictly controlled, constant-pulling-speed pouring is guaranteed, and the problem that pressure is not in place due to movement of a light-pressure position caused by pulling-speed fluctuation is avoided. Statistical analysis is carried out on the control condition of the sector section in the continuous casting process, the phenomenon of internal leakage of a clamping cylinder of the sector section of the casting machine is found, the pressure of a hydraulic system is low, the pulling speed is 0.9-1.0m/min, the cooling specific water amount is 0.80L/kg, at the moment, the deviation of a continuous casting roll gap from a target value is large, the roll gap value is in a fluctuation state of 0-4 mm, a middle crack exists near a triangular area after the casting blank is detected by a low power, and the proportion of C class corresponding to central segregation is increased by 1.5. Therefore, in order to reduce center segregation and eliminate the triangular space cracks, continuous casting equipment and a process improvement system are established as shown in table 2, and specifically: firstly, adjusting the pressure of a fan-shaped section system to 190-205 bar; secondly, measuring and calibrating the sector section on line to ensure that the measurement error after calibration is within 0.02 mm; executing strictly according to the section-pulling speed corresponding scheme; fourthly, secondary cooling and weak cooling are adopted, and the quantity of the secondary cooling and the weak cooling is 0.72L/kg; and fifthly, pouring at a constant speed. Tracking historical data of a roll gap of a sector section under dynamic soft reduction in a casting blank production process, wherein the roll gap control precision is 0-0.1 mm. The triangular region cracks are eliminated, and the proportion of the center segregation C class less than or equal to 1.0 is greatly improved from 60 percent to 90 percent.
TABLE 2 continuous casting apparatus, Process parameters
Claims (3)
1. A control method for improving the control precision of the opening degree of a continuous casting fan-shaped section under soft reduction is characterized by comprising the following steps:
(1) the inspection and replacement period of the clamping cylinder of the sector section is improved, the original 7-day inspection and replacement is changed into 3-day inspection and replacement, and the situation that the sector section is not in place due to insufficient pressure relief force in the hydraulic cylinder is avoided;
(2) the pressure of the hydraulic system of the segment is increased from 155-175bar to 180-205bar, and the pressure fluctuation range is controlled between 185-195 bar, so that the segment pressure is realized to the target position on the power level;
(3) the roll gap of the casting machine is measured and calibrated on line, so that the deviation of the sector section after being put into service for a period of time on line is avoided, and the control precision of the roll gap is ensured to be within +/-0.1 mm;
(4) dividing a steel group, a pouring section and a corresponding pulling speed, making a matching table of a sector section in-place pressing section, a steel type and the pulling speed, adjusting the pulling speed according to different steel types and different sections, and ensuring that the position control of the solidification tail end of a casting blank under a soft reduction condition is normal;
(5) the continuous drawing furnace number, the direct-charging hot conveying and different process routes are matched, the production rhythm is optimized according to the contract conditions of the process routes and the direct-charging direct conveying, the proper temperature is controlled, the constant drawing speed production is ensured, and the phenomenon that the variation of the drawing speed causes the variation of the soft reduction position of the sector section to aggravate the dendrite segregation at the tail end of the liquid core of the casting blank is avoided.
2. The control method for improving the control precision of the opening degree of the continuous casting fan-shaped section under the soft reduction condition as claimed in claim 1 is characterized in that: in the step (3), the concrete steps are as follows:
firstly, adjusting the movable side of the sector section to a mechanical position, and measuring four roll gap values at specified positions on two sides of a roll by using a hand-held roll gap instrument;
secondly, inputting the measured roll gap value into position sensors of four oil cylinders for controlling the opening degree of the sector section, and calibrating the mechanical position to be 0 bit;
thirdly, after calibration is finished, adjusting the roll gap of the sector section to a roll gap value which is 230mm, 235mm, 240mm or 245mm and reasonably accords with actual production, observing that the clamping cylinder acts normally without blocking on site, measuring again at the same specified position by using a handheld roll gap instrument, and finishing calibration when the error between an actual measured value and the reading value of the sensor is within +/-0.02 mm;
and fourthly, when the error between the actual measured value and the reading of the hydraulic cylinder position sensor exceeds +/-0.02 mm, modifying the compensation value, and repeating the steps of the first step and the second step until the roll gap is adjusted to be within the error range.
3. The control method for improving the control precision of the opening degree of the continuous casting fan-shaped section under the soft reduction condition as claimed in claim 1 is characterized in that: the thickness of the plate blank is 230-250 mm, four fan-shaped sections are dynamically and lightly pressed at the solidification tail end, the total pressing amount is 6-8 mm, and the pressing amount of a single fan-shaped section is 1.5-2.0 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054707A (en) * | 2021-10-11 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Method for reducing center segregation of pipeline steel continuous casting billet |
| CN115069999A (en) * | 2022-06-30 | 2022-09-20 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through foot roll printing and casting of narrow surface of casting blank |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5813457A (en) * | 1981-07-14 | 1983-01-25 | Sumitomo Metal Ind Ltd | Continuous casting method |
| JP2001269756A (en) * | 2000-03-24 | 2001-10-02 | Kawasaki Steel Corp | Instrument for measuring roll interval in continuous casting facility |
| CN101327516A (en) * | 2007-06-22 | 2008-12-24 | 上海宝信软件股份有限公司 | Method for controlling roll gap of roller in segment soft reduction control technology |
| CN101979184A (en) * | 2010-11-23 | 2011-02-23 | 田陆 | Control method and system for dynamic soft reduction of continuous casting machine, and continuous casting machine |
| CN102126006A (en) * | 2010-01-14 | 2011-07-20 | 宝山钢铁股份有限公司 | Roll gap control method for soft reduction technology for continuous casting |
| CN104972091A (en) * | 2015-06-25 | 2015-10-14 | 中冶连铸技术工程有限责任公司 | Modification method and device for target roll gap value of withdrawal and straightening machine |
| CN105234364A (en) * | 2015-09-09 | 2016-01-13 | 中冶连铸技术工程有限责任公司 | Method and device for controlling roller seam deviation in soft pressing process or hard pressing process |
| CN107442756A (en) * | 2017-07-21 | 2017-12-08 | 首钢集团有限公司 | The method for improving slab slighter compress efficiency |
-
2020
- 2020-08-27 CN CN202010878673.2A patent/CN112264594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5813457A (en) * | 1981-07-14 | 1983-01-25 | Sumitomo Metal Ind Ltd | Continuous casting method |
| JP2001269756A (en) * | 2000-03-24 | 2001-10-02 | Kawasaki Steel Corp | Instrument for measuring roll interval in continuous casting facility |
| CN101327516A (en) * | 2007-06-22 | 2008-12-24 | 上海宝信软件股份有限公司 | Method for controlling roll gap of roller in segment soft reduction control technology |
| CN102126006A (en) * | 2010-01-14 | 2011-07-20 | 宝山钢铁股份有限公司 | Roll gap control method for soft reduction technology for continuous casting |
| CN101979184A (en) * | 2010-11-23 | 2011-02-23 | 田陆 | Control method and system for dynamic soft reduction of continuous casting machine, and continuous casting machine |
| CN104972091A (en) * | 2015-06-25 | 2015-10-14 | 中冶连铸技术工程有限责任公司 | Modification method and device for target roll gap value of withdrawal and straightening machine |
| CN105234364A (en) * | 2015-09-09 | 2016-01-13 | 中冶连铸技术工程有限责任公司 | Method and device for controlling roller seam deviation in soft pressing process or hard pressing process |
| CN107442756A (en) * | 2017-07-21 | 2017-12-08 | 首钢集团有限公司 | The method for improving slab slighter compress efficiency |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054707A (en) * | 2021-10-11 | 2022-02-18 | 包头钢铁（集团）有限责任公司 | Method for reducing center segregation of pipeline steel continuous casting billet |
| CN115069999A (en) * | 2022-06-30 | 2022-09-20 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through foot roll printing and casting of narrow surface of casting blank |
| CN115069999B (en) * | 2022-06-30 | 2023-07-21 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through casting blank narrow-face foot roll mark casting |
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