CN104152656A - Control method for stable plate passing of cold-rolled strip steels based on thickness and width specifications - Google Patents
Control method for stable plate passing of cold-rolled strip steels based on thickness and width specifications Download PDFInfo
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- CN104152656A CN104152656A CN201410395222.8A CN201410395222A CN104152656A CN 104152656 A CN104152656 A CN 104152656A CN 201410395222 A CN201410395222 A CN 201410395222A CN 104152656 A CN104152656 A CN 104152656A
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Abstract
The invention discloses a control method for stable plate passing of cold-rolled strip steels based on thickness and width specifications. The control method comprises the following steps: the width specification transition is performed for cold-rolled strip steels with thickness specifications not less than 1.0 mm and width specifications not greater than 1000 mm, and the front-back width specification transition of the cold-rolled strip steels is not greater than 100 mm; the thickness specification transition and the speed transition are performed for the cold-rolled strip steels passing the width specification transition, so that the cold-rolled strip steels stably enter a continuous annealing furnace area; and the narrow mode heating is performed for the strip steels in the continuous annealing furnace area, and burners of radiator tubes are synchronously adjusted, so that finished products are obtained after the stable plate passing is performed for the cold-rolled strip steels in the continuous annealing set. The control method for the stable plate passing of the cold-rolled strip steels effectively realizes the stable plate passing of the strip steels by controlling the parameters of width specification transition, thickness specification transition and speed transition, can successfully solve deflection and stopping problem caused by excessive thickness and width specification transitions, promotes the stable operation of a production line, and improves the product performance.
Description
Technical field
The present invention relates to Cold Rolling technical field, particularly the control method of the stable logical plate of a kind of thick narrow specification cold rolled strip.
Background technology
Continuous annealing unit is the important step of cold rolled strip steel production, and the series of advantages such as flow process is short, output is high, good product quality that it has, are indispensable annealing devices.Along with improving constantly that user requires quality product, connect and move back annealing product in stove and replace gradually that cover moves back product and specification is thin wide, thick narrow to two ends development, and plate speed is more and more higher.High-speed and continuous annealing unit is typical hi-tech modern production line, and its control object intercouples, and the difficulty of management is very large.Wherein, the bent and sideslip of wooden dipper with steel in continuous annealing furnace happens occasionally, and causes the unit can not high-speed stable running, restricts the performance of unit production capacity.Conventionally, in continuous annealing furnace, adopt and prevent strip running deviation with the furnace roller of convexity, this makes to be with steel produce " centripetal force " in the time that roller moves, and the band steel of sideslip is drawn to furnace roller central authorities, produces the trapezoidal convexity roller that line adopts as shown in Figure 1 for connecting to move back.Furnace roller convexity may change because of body of roll non-uniform temperature in stove, causes strip running deviation or wooden dipper song, is especially illustrated in figure 2 to connect in heating zone and moves back the schematic diagram that produces line, the convexity maximum of furnace roller.Company moves back between the different restraining factors such as temperature field, tension distribution and the furnace roller convexity layout in stove and is optimized, and ensures that to greatest extent the stable logical plate of unit is the major issue needing to be studied.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of in ensureing continuous annealing production line plate speed, can also make the control method of the stable stable logical plate of thick narrow specification cold rolled strip of the logical plate of unit.
For solving the problems of the technologies described above, the invention provides the control method of the stable logical plate of a kind of thick narrow specification cold rolled strip, comprise: by thickness specification >=1.0mm, it is excessive that the cold rolled strip of width specifications≤1000mm carries out width specifications, before and after cold rolled strip width specifications excessively≤100mm;
By being undertaken by the excessive cold rolled strip of width specifications, thickness specification is excessive, speed is excessive, makes the stable continuous annealing furnace district that enters of cold rolled strip, and described cold rolled strip being carried out to speed when excessive, the normal minimum travelling speed control of described cold rolled strip is as follows:
| Thickness specification mm | 1 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 2 | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 |
| Speed m/min | 245 | 210 | 210 | 210 | 210 | 160 | 160 | 150 | 150 | 150 | 120 | 120 | 120 | 110 | 110 | 110 |
The band steel that enters continuous annealing furnace district is carried out to the heating of narrow pattern, adjust the burner of radiator tube simultaneously, make cold rolled strip obtain finished product after continuous annealing unit is stablized logical plate.
Further, described by enter continuous annealing furnace district be with steel to carry out the heating of narrow pattern in, described cold rolled strip is entered after heating zone to the radiator tube at 100m place and carries out selectivity and close, so that control the hot convexity of furnace roller.
Further, describedly cold rolled strip is entered after heating zone to the radiator tube at 100m place carrying out selectivity while closing, is to close enter heating zone to the radiator tube at top, 100m Chu Lu district with steel.
Further, thickness specification when excessive, reduces the travelling speed 10m/min with steel to thick by thin before and after excessively, and stable for ensureing the travelling speed with steel, while if desired improving strip speed, speed improves frequency control in 5m/min.
The control method of the stable logical plate of a kind of thick narrow specification cold rolled strip provided by the invention, by excessive to width specifications, thickness specification is excessive, the parameter control that speed is excessive, effectively realize the stable logical plate with steel, can successfully solve thick narrow specification sideslip parking problem, promote to produce the stable operation of line, improve product performance.
Brief description of the drawings
Fig. 1 is prior art Zhong Lu district furnace roller schematic diagram.
Fig. 2 is the each passage schematic diagram in prior art Zhong Lu district.
The furnace roller temperature that Fig. 3 provides for the embodiment of the present invention is at the distribution plan of width.
The thickness that Fig. 4 provides for the embodiment of the present invention is excessively 1.2mm strip running deviation situation schematic diagram when excessive to 1.5mm.
The hot convexity changing conditions of furnace roller that Fig. 5 provides for the embodiment of the present invention.
The mechanical property of the typical products that Fig. 6 provides for the embodiment of the present invention.
The typical products that Fig. 7 provides for the embodiment of the present invention organize photo.
Embodiment
The control method of the stable logical plate of a kind of thick narrow specification cold rolled strip that the embodiment of the present invention provides, comprising:
Step S1: by thickness specification >=1.0mm, it is excessive that the cold rolled strip of width specifications≤1000mm carries out width specifications, before and after cold rolled strip width specifications excessively≤100mm;
Require width specifications excessively≤object of 100mm be because, if strip width specification is excessively excessive, because width before and after coil of strip is different, the position temperature that coil of strip above contacts with furnace roller is relatively low, and do not have the position temperature of contact high, from accompanying drawing 3, differently with the length of furnace roller effect before and after coil of strip cause temperature fluctuation larger, be with steel that sideslip easily occurs.
Thickness specification when excessive, reduces the travelling speed 10m/min with steel to thick by thin before and after excessively.The object that reduces strip speed is in order to adjust the temperature with steel, this object core is just to reduce the gap of belt steel temperature and furnace roller temperature, if not reduction of speed, but the temperature-resistant heavy gauge steel strip temperature of furnace roller can reduce, should be stove adjustment and need the regular hour, in adjusting during this period of time, temperature spread widens, and easily sideslip occurs.Stable for ensureing the travelling speed with steel, while if desired improving strip speed, speed improves frequency control in 5m/min, and raising travelling speed can reduce the fluctuation of temperature as far as possible.
Step S2: thickness specification is excessive, speed is excessive by being undertaken by the excessive cold rolled strip of width specifications, makes the stable continuous annealing furnace district that enters of cold rolled strip;
Described cold rolled strip being carried out to speed when excessive, the normal minimum travelling speed control of described cold rolled strip is as follows:
| Thickness specification mm | 1 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 2 | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 |
| Speed m/min | 245 | 210 | 210 | 210 | 210 | 160 | 160 | 150 | 150 | 150 | 120 | 120 | 120 | 110 | 110 | 110 |
Step S3: in order to promote as early as possible the speed of heating, it (is narrow material pattern that the band steel that enters continuous annealing furnace district is carried out to narrow pattern, below be referred to as narrow pattern) heating, adjust the burner of radiator tube simultaneously, make cold rolled strip obtain finished product after continuous annealing unit is stablized logical plate.
Position with the easy sideslip of steel is fixed, mainly in the position that enters stove district 100m left and right, even if the major cause that this position exists is because adopt narrow pattern immediately temperature to be improved, so also need to adjust by employing the way of radiator tube, reduce the temperature of furnace roller.By enter continuous annealing furnace district be with steel to carry out the heating of narrow pattern in, cold rolled strip is entered after heating zone to the radiator tube at 100m place to carry out selectivity and closes, specifically close enter heating zone to the radiator tube at top, 100m Chu Lu district with steel, so that control the hot convexity of furnace roller.
The control method of the stable logical plate of a kind of thick narrow specification cold rolled strip provided by the invention, by excessive to width specifications, thickness specification is excessive, the parameter control that speed is excessive, effectively realize the stable logical plate with steel, can successfully solve thick narrow specification sideslip parking problem, promote to produce the stable operation of line, improve product performance.
The present invention, by technique scheme, by adjusting above measure, effectively realizes the stable logical plate with steel in thick narrow specification product production process, has successfully solved at present thick narrow specification sideslip parking problem, has promoted the production of producing line along steady.
Below in conjunction with accompanying drawing of the present invention, technical scheme of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The chill volume of DC04 that is 1*810mm by the specification of rolling is reached the standard grade and is entered in annealing furnace after cleaning, annealing furnace speed adopts the speed shown in table 1, tension parameters is according to shown in table 2, heating mode adopts narrow pattern, and closed the burner on close furnace roller top, the product performance that final production goes out are as shown in table 3.
Table 1
| Thickness specification mm | 1 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 2 | 2.1 | 2.2 | 2.3 | 2.4 | 2.5 |
| Speed m/min | 245 | 210 | 210 | 210 | 210 | 160 | 160 | 150 | 150 | 150 | 120 | 120 | 120 | 110 | 110 | 110 |
Table 2
Table 3
Embodiment 2
The chill volume of DC03 that is 1.6*830mm by the specification of rolling is reached the standard grade and is entered in annealing furnace after cleaning, annealing furnace speed adopts the speed shown in table 1, tension parameters is according to shown in table 2, heating mode adopts narrow pattern, and close the burner on close furnace roller top, the reduction of speed that sideslip does not occur and cause due to sideslip with steel, as shown in Figure 4, the product performance that final production goes out are as shown in table 4 for strip steel deviation roller action situation.
Table 4
Embodiment 3
The chill volume of ST37-2G that is 2.5*960mm by the specification of rolling is reached the standard grade and is entered in annealing furnace after cleaning, annealing furnace speed adopts the speed shown in table 1, tension parameters is according to shown in table 2, heating mode adopts narrow pattern, and the burner of having closed close furnace roller top, and furnace roller convexity as shown in Figure 5, there is not sideslip and reduction of speed phenomenon in band steel, the product performance that final production goes out are as shown in table 5, and as shown in Figure 6, band structure of steel photo as shown in Figure 7 for its stress strain curve
Table 5
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. a control method for the stable logical plate of thick narrow specification cold rolled strip, is characterized in that, comprising:
By thickness specification >=1.0mm, it is excessive that the cold rolled strip of width specifications≤1000mm carries out width specifications, before and after cold rolled strip width specifications excessively≤100mm;
By being undertaken by the excessive cold rolled strip of width specifications, thickness specification is excessive, speed is excessive, makes the stable continuous annealing furnace district that enters of cold rolled strip, and described cold rolled strip being carried out to speed when excessive, the normal minimum travelling speed control of described cold rolled strip is as follows:
The band steel that enters continuous annealing furnace district is carried out to the heating of narrow pattern, adjust the burner of radiator tube simultaneously, make cold rolled strip obtain finished product after continuous annealing unit is stablized logical plate.
2. the control method of the stable logical plate of thick narrow specification cold rolled strip according to claim 1, is characterized in that:
Described by enter continuous annealing furnace district be with steel to carry out the heating of narrow pattern in, described cold rolled strip is entered after heating zone to the radiator tube at 100m place and carries out selectivity and close, so that control the hot convexity of furnace roller.
3. the control method of the stable logical plate of thick narrow specification cold rolled strip according to claim 1, is characterized in that:
Describedly cold rolled strip is entered after heating zone to the radiator tube at 100m place carrying out selectivity while closing, is to close enter heating zone to the radiator tube at top, 100m Chu Lu district with steel.
4. the control method of the stable logical plate of thick narrow specification cold rolled strip according to claim 1, is characterized in that:
Thickness specification when excessive, reduces the travelling speed 10m/min with steel to thick by thin before and after excessively, and stable for ensureing the travelling speed with steel, while if desired improving strip speed, speed improves frequency control in 5m/min.
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| CN106148652A (en) * | 2016-08-29 | 2016-11-23 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of flat cold-rolled sheet continuous annealing |
| CN110714116A (en) * | 2019-11-05 | 2020-01-21 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN111020173A (en) * | 2019-11-20 | 2020-04-17 | 唐山钢铁集团高强汽车板有限公司 | Method for controlling heating output of continuous annealing furnace according to thickness specification |
| CN111363910A (en) * | 2020-03-03 | 2020-07-03 | 首钢京唐钢铁联合有限责任公司 | Pulse type burner heating output control method and system |
| CN114410950A (en) * | 2022-01-25 | 2022-04-29 | 山东钢铁集团日照有限公司 | Control method for preventing low-temperature high-strength steel from deviating in continuous annealing furnace |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105112643A (en) * | 2015-09-15 | 2015-12-02 | 首钢京唐钢铁联合有限责任公司 | Control method for heating output of continuous annealing production line |
| CN105506269A (en) * | 2015-12-18 | 2016-04-20 | 武汉钢铁(集团)公司 | Continuous annealing unit phosphorus-containing high-strength steel anti-deviation method |
| CN105506269B (en) * | 2015-12-18 | 2018-06-26 | 武汉钢铁有限公司 | The anti-deviation method of the phosphorous high-strength steel of continuous annealing unit |
| CN106148652A (en) * | 2016-08-29 | 2016-11-23 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of flat cold-rolled sheet continuous annealing |
| CN106148652B (en) * | 2016-08-29 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | A kind of method and device of flat cold-rolled sheet continuous annealing |
| CN110714116A (en) * | 2019-11-05 | 2020-01-21 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN110714116B (en) * | 2019-11-05 | 2020-12-15 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN111020173A (en) * | 2019-11-20 | 2020-04-17 | 唐山钢铁集团高强汽车板有限公司 | Method for controlling heating output of continuous annealing furnace according to thickness specification |
| CN111020173B (en) * | 2019-11-20 | 2021-09-07 | 唐山钢铁集团高强汽车板有限公司 | Method for controlling heating output of continuous annealing furnace according to thickness specification |
| CN111363910A (en) * | 2020-03-03 | 2020-07-03 | 首钢京唐钢铁联合有限责任公司 | Pulse type burner heating output control method and system |
| CN111363910B (en) * | 2020-03-03 | 2021-11-19 | 首钢京唐钢铁联合有限责任公司 | Pulse type burner heating output control method and system |
| CN114410950A (en) * | 2022-01-25 | 2022-04-29 | 山东钢铁集团日照有限公司 | Control method for preventing low-temperature high-strength steel from deviating in continuous annealing furnace |
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