CN108637014B - A kind of very thin steel band process of hot rolling - Google Patents
A kind of very thin steel band process of hot rolling Download PDFInfo
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- CN108637014B CN108637014B CN201810431450.4A CN201810431450A CN108637014B CN 108637014 B CN108637014 B CN 108637014B CN 201810431450 A CN201810431450 A CN 201810431450A CN 108637014 B CN108637014 B CN 108637014B
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- strip
- cooling
- steel band
- hot rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- 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
- B21B37/76—Cooling control on the run-out table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of very thin steel band processes of hot rolling, comprising: heating of plate blank；Roughing；Finish rolling, and the upper pressure range for controlling the last rack upper working rolls and lower working rolls of finishing mill is 0.1mm-0.15mm, last breast roller elevation range is -5mm-10mm；It is cooling, the strip Jing Guo finish rolling is cooled down using section cooling method；Curling, will be rolled into coiled sheet by coiling machine through overcooled strip.Using the very thin steel band process of hot rolling provided by the invention, upper pressure range by the upper working rolls and lower working rolls for controlling rack of finishing mill is 0.1mm-0.15mm, last breast roller elevation range is -5mm-10mm, to ensure that strip goes out the head shape of finishing mill, the head shape for guaranteeing that strip goes out finishing mill does not occur upwarping and lower button, to effectively reduce strip floating phenomenon, and then reduce thus caused waste of material and product roll marks defect.
Description
Technical field
The present invention relates to metallurgical technology fields, more specifically to a kind of very thin steel band process of hot rolling.
Background technique
When hot continuous rolling production line produces Ultra-thin strip, strip needs carry out section cooling after heating, roughing, finish rolling
System enters coiling machine and is batched, and forms final products.
However, strip enters section cooling stage, the floating that can be generated on section cooling roller-way after finishing mill rolling
Phenomenon.Especially for hot continuous rolling production Ultra-thin strip when generally existing floating phenomenon.Due to Ultra-thin hot-strip
Thickness is very thin, and speed is exceedingly fast, thus strip generates on roller-way and floats, play set, fold, after being batched into coiling machine, subsequent work
Sequence must carry out flat line excision (about 140 meters of length), simultaneously because the pinch roller before the strip injury coiling machine folded
With the Wrapping Roll of coiling machine, causes roller to glue meat and subsequent strip is made to generate roll marks defect.
There are floating phenomenons to cause when in conclusion how to efficiently solve hot continuous rolling production line production Ultra-thin strip
Waste of material and the problems such as product roll marks defect, be current those skilled in the art's problem to be solved.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of very thin steel band process of hot rolling, the very thin steel band of the hot rolling
Process can efficiently solve hot continuous rolling production line production Ultra-thin strip when there are material caused by floating phenomenon wave
Take and the problem of product roll marks defect.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of very thin steel band process of hot rolling, comprising:
Heating of plate blank；
Roughing；
Finish rolling, and the upper pressure range for controlling the upper working rolls and lower working rolls of rack of finishing mill is 0.1mm-0.15mm, last rack is rolled
Roller elevation range is -5mm-10mm；
It is cooling, the strip Jing Guo finish rolling is cooled down using section cooling method；
Curling, will be rolled into coiled sheet by coiling machine through overcooled strip.
Preferably, in the very thin steel band process of above-mentioned hot rolling, further includes: control the last rack threading of the cooling procedure
Velocity interval is 10m/s-10.6m/s.
Preferably, in the very thin steel band process of above-mentioned hot rolling, further includes: when monitoring the strip in cooling section roller-way
When upper generation set amount, then the last rack threading speed of the cooling procedure is reduced.
Preferably, in the very thin steel band process of above-mentioned hot rolling, the last rack threading speed for reducing the cooling procedure
Degree, specifically includes:
The threading stepwise speed for controlling the cooling procedure reduces pre-set velocity value, until the strip is in the cooling section
Set amount on roller-way disappears.
Preferably, in the very thin steel band process of above-mentioned hot rolling, further includes: control the spray regime of laminar cooling water always
For preset range, the preset range is the band after the head preset length of the strip to advance on cooling roller bed
Steel.
Preferably, in the very thin steel band process of above-mentioned hot rolling, the preset length is 50m-100m.
Preferably, in the very thin steel band process of above-mentioned hot rolling, further includes: when monitoring the strip in cooling section roller-way
The corresponding preset length increase setting length value of next piece of strip when upper generation set amount, then after controlling the strip.
Using the very thin steel band process of hot rolling provided by the invention, by the upper working rolls and lower working rolls for controlling rack of finishing mill
Upper pressure range be 0.1mm-0.15mm, last breast roller elevation range be -5mm-10mm, to ensure that strip goes out the head of finishing mill
Portion's shape.When bad due to strip steel head shape, strip steel head will be collided in first layer-cold roller way, and it is upright upwards to generate head
Form, in the subsequent operation of rolling, by the resistance of wind, subsequent strip is made to play set in layer-cold roller way, generates floating.It is thus logical
Above-mentioned setting is crossed, the head shape for guaranteeing that strip goes out finishing mill does not occur upwarping and lower button, floats to effectively reduce strip
Phenomenon, and then reduce thus caused waste of material and product roll marks defect.
In one preferred embodiment, the last rack threading velocity interval for controlling cooling procedure is 10m/s-10.6m/
s.Since the starting point that strip generates floating is that strip enters transition plates after shutting out in finishing mill, then climb into the first root layer
Flow cooling roller bed.Transition plates makes strip steel head so strip has a climbing process after going out finishing mill lower than layer-cold roller way 40mm
It tilts, when strip speed is very big, very big big set will be formed, continuing several meters could drop in layer-cold roller way again.Subsequent band
Steel pushing ahead of wave upon wave, big set is measured to form folding, into coiling machine.By the threading speed for controlling cooling procedure
Within the above range, the reduction of threading speed enables to the strip steel head worn that can timely drop in layer-cold roller way, no
Big band steel bushing amount is generated, the waste of material as caused by strip floating phenomenon and product roll marks defect are further reduced.
In another preferred embodiment, further includes: the spray regime for controlling laminar cooling water is always default model
It encloses, preset range is the strip after the head preset length of the strip to advance on cooling roller bed.Due to but strip it is too thin, layer
Stream cooling water is also enough to generate the resistance to advance to strip, and strip is made to generate floating, play set.Thus not by control strip steel head
Spray laminar cooling water, prevent strip steel head from encountering the resistance of layer cold water and subsequent strip is made to generate floating, be further reduced due to
Waste of material caused by strip floating phenomenon and product roll marks defect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram of the very thin steel band process of hot rolling of a specific embodiment of the invention.
Specific embodiment
The embodiment of the invention discloses a kind of very thin steel band processes of hot rolling, produce to avoid hot continuous rolling production line very thin
Floating phenomenon when specification strip steel, and then avoid thus caused waste of material and product roll marks defect.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the process signal of the very thin steel band process of hot rolling of a specific embodiment of the invention
Figure.
In a specific embodiment, the very thin steel band process of hot rolling provided by the invention, comprising:
S1: heating of plate blank；
S2: roughing；
S3: finish rolling, and the upper pressure range for controlling the upper working rolls and lower working rolls of rack of finishing mill is 0.1mm-0.15mm, last rack
Roll elevation range is -5mm-10mm；
S4: it is cooling, the strip Jing Guo finish rolling is cooled down using section cooling method；
S5: curling will be rolled into coiled sheet by coiling machine through overcooled strip.
Specific heating of plate blank, roughing, cooling and the technical process of curling can refer to the prior art, and and will not be described here in detail.Its
In, in finishing rolling step, the upper pressure range for controlling the upper working rolls and lower working rolls of rack of finishing mill is 0.1mm-0.15mm, last breast roller
Elevation range is -5mm-10mm.Certainly, for a certain technique, upper pressure should be a value determined, and the value is in above-mentioned upper pressure
In range.
Using the very thin steel band process of hot rolling provided by the invention, by the upper working rolls and lower working rolls for controlling rack of finishing mill
Upper pressure range be 0.1mm-0.15mm, last breast roller elevation range be -5mm-10mm, to ensure that strip goes out the head of finishing mill
Portion's shape.When bad due to strip steel head shape, strip steel head will be collided in first layer-cold roller way, and it is upright upwards to generate head
Form, in the subsequent operation of rolling, by the resistance of wind, subsequent strip is made to play set in layer-cold roller way, generates floating.It is thus logical
Above-mentioned setting is crossed, the head shape for guaranteeing that strip goes out finishing mill does not occur upwarping and lower button, floats to effectively reduce strip
Phenomenon, and then reduce thus caused waste of material and product roll marks defect.
Further, further includes: the last rack threading velocity interval for controlling cooling procedure is 10m/s-10.6m/s.Also
It is that in step s 4, controlling last rack threading velocity interval is 10m/s-10.6m/s.Since the starting point that strip generates floating is
Strip enters transition plates after shutting out in finishing mill, then climbs into the first root layer stream cooling roller bed.Transition plates is lower than layer chilling roller
Road 40mm tilts strip steel head so strip has a climbing process after going out finishing mill, when strip speed is very big, by shape
At very big big set, continuing several meters could drop in layer-cold roller way again.Subsequent strip pushing ahead of wave upon wave, big
Set is measured to form folding, into coiling machine.By control cooling procedure threading speed within the above range, the drop of threading speed
It is low, it enables to the strip steel head worn that can timely drop in layer-cold roller way, does not generate big band steel bushing amount, further subtract
Few waste of material as caused by strip floating phenomenon and product roll marks defect.Certainly, for a certain technique, threading speed
It should be a value determined, and the value is in above-mentioned velocity interval.Different threading speed is configured for the strip of different-thickness, really
The strip steel head worn on guarantor can be dropped to timely in layer-cold roller way, not generate big band steel bushing amount.As needed, it can also control
The threading speed of roughing and finish rolling processed is in above-mentioned velocity interval.
Further, further includes: when monitoring that strip generates set amount on cooling section roller-way, then reduce cooling procedure
Last rack threading speed.Namely state of the real-time monitoring strip on cooling roller bed, if strip generates set amount in cooling process,
Then reduce the threading speed of cooling procedure.The degree specifically reduced can be configured as needed, be not especially limited herein.It is right
The monitoring of strip state on cooling roller bed specifically can obtain its state by image acquisition equipments such as cameras in real time,
Artificial observation etc. can be passed through.
Further, the last rack threading speed for reducing cooling procedure, specifically includes:
The last rack threading stepwise speed for controlling cooling procedure reduces pre-set velocity value, until strip is on cooling section roller-way
Set amount disappear.If namely strip generates set amount in cooling process, last rack threading speed is gradually decreased.It is as pre- in first reduced
If velocity amplitude, according to that need to monitor whether strip generates set amount on cooling roller bed, if there is set amount, then pre-set velocity value is being reduced.
It is so repeated up to generation set amount on strip no longer cooling roller bed, then can be maintained in the threading speed.Specific pre-set velocity
The size of value can be set as needed, and be not especially limited herein.
On the basis of the various embodiments described above, further includes: the spray regime for controlling laminar cooling water is always preset range,
Preset range is the strip after the head preset length of the strip to advance on cooling roller bed.In other words, section cooling is controlled
Water does not spray water to the strip steel head preset length advanced on cooling roller bed always.Namely strip steel head on cooling roller bed before
Into when, only spray laminar cooling water to by the later part strip of head preset length, and for advancing on cooling roller bed
Strip steel head preset length, which remains, does not spray laminar cooling water.Since even if strip steel head is good, after crossing first roller-way
It does not upwarp for a long time, but strip is too thin, laminar cooling water is also enough to generate the resistance to advance to strip, and strip is made to generate floating, rise
Set.Laminar cooling water is not thus sprayed by controlling strip steel head, prevents strip steel head from encountering the resistance of layer cold water and making subsequent band
Steel generates floating, is further reduced the waste of material as caused by strip floating phenomenon and product roll marks defect.
Specifically, the preset length that head is not sprayed water is 50m-100m.The 50m-100m length namely from strip steel head
It keeps not spraying laminar cooling water in range.Certainly, for a certain technique, for the ease of control, preset length should be one really
Fixed value, and the value is within the scope of above-mentioned preset length.The size of specific preset length can adjust as needed, general default length
Degree control can avoid the generation of set amount within the above range.
Further, further includes: when monitoring that strip generates set amount on cooling section roller-way, then after controlling the strip
The corresponding preset length increase setting length value of next piece of strip.Namely implement state of the monitoring strip on cooling roller bed,
Specifically its state can be obtained in real time by image acquisition equipments such as cameras, can also pass through artificial observation etc..It is covered when generating
When amount, then the corresponding preset length increase setting length value of next piece of strip is controlled, that is, next piece of strip increases head not
Spray the length of laminar cooling water.It is fed back by real time monitoring and adjusts control parameter, preferably to prevent strip floating phenomenon, into
And waste of material caused by reducing thus and product roll marks defect.
To sum up, comprehensive treatment is carried out by several technologies such as comprehensive roll-in, absolute altitude, reduction of speed, hot head complex arts, with
Avoid strip floating phenomenon.And this technology all has great popularization value hot-continuous-rolling strip steel factory.
Illustrate by taking a preferred embodiment as an example below.
When rolling the Ultra-thin strip of 1.4mm, configuring last rack roll-in is upper pressure 0.1mm, last rack absolute altitude -5mm
~10mm；Last rack threading speed is set to 10.3m/s；Strip steel head rises within the scope of 60m and protects always when advancing on cooling roller bed
It holds and does not spray laminar cooling water.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (4)
1. a kind of very thin steel band process of hot rolling characterized by comprising
Heating of plate blank；
Roughing；
Finish rolling, and the upper pressure range for controlling the upper working rolls and lower working rolls of rack of finishing mill is 0.1mm-0.15mm, last breast roller mark
High scope is -5mm-10mm；
It is cooling, the strip Jing Guo finish rolling is cooled down using section cooling method；And control the spray regime of laminar cooling water
It is always preset range, the preset range is the institute after the head preset length of the strip to advance on cooling roller bed
Strip is stated, the preset length is 50m-100m；The last rack threading velocity interval for controlling the cooling procedure is 10m/s-
10.6m/s；
Curling, will be rolled into coiled sheet by coiling machine through overcooled strip.
2. the very thin steel band process of hot rolling according to claim 1, which is characterized in that further include: it is described when monitoring
Strip then reduces the last rack threading speed of the cooling procedure when generating set amount on cooling section roller-way.
3. the very thin steel band process of hot rolling according to claim 2, which is characterized in that described to reduce the cooling procedure
Last rack threading speed, specifically include:
The threading stepwise speed for controlling the cooling procedure reduces pre-set velocity value, until the strip is in the cooling section roller-way
On set amount disappear.
4. the very thin steel band process of hot rolling according to claim 1-3, which is characterized in that further include: work as prison
The strip is measured when generating set amount on cooling section roller-way, then next piece of strip after controlling the strip is corresponding described default
Length increase setting length value.
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| CN201810431450.4A CN108637014B (en) | 2018-05-08 | 2018-05-08 | A kind of very thin steel band process of hot rolling |
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| CN111266406B (en) * | 2020-03-02 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Rolling method of ultrathin hot continuous rolling steel strip |
| CN111451290A (en) * | 2020-03-31 | 2020-07-28 | 鞍钢股份有限公司 | Production method for preventing thin strip steel head from being folded |
| CN111451272B (en) * | 2020-03-31 | 2021-08-20 | 鞍钢股份有限公司 | Finish rolling control method for thin container steel plate |
| CN114433639B (en) * | 2022-03-14 | 2023-03-24 | 武汉钢铁有限公司 | Production method capable of reducing flying and warping of ultrathin strip steel on CSP production line |
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| EP0870553A3 (en) * | 1997-04-10 | 1999-02-10 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Rolling method for thin flat products and relative rolling line |
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