CN108504852A - A method of for controlling high annealing coil of strip tail volume - Google Patents
A method of for controlling high annealing coil of strip tail volume Download PDFInfo
- Publication number
- CN108504852A CN108504852A CN201810637013.8A CN201810637013A CN108504852A CN 108504852 A CN108504852 A CN 108504852A CN 201810637013 A CN201810637013 A CN 201810637013A CN 108504852 A CN108504852 A CN 108504852A
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- strip
- fill
- ratio
- coil
- high annealing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
Abstract
The present invention provides a kind of methods for controlling high annealing coil of strip tail volume, include the following steps：Strip is batched in decarburizing annealing and after applying magnesia, and control fill-in ratio is 91%~92%, obtains decarburizing annealing coil of strip；The decarburizing annealing coil of strip is subjected to high annealing, carries out uncoiling later.The concept of fill-in ratio is utilized in the present invention for the first time, it is equal to the ratio of decarburizing annealing coil of strip actual weight and decarburizing annealing coil of strip theoretical weight, fill-in ratio is the concentrated expression that the parameters such as belt steel thickness, coil of strip coiling tension, coiling tension taper, magnesia pressed density, magnesia coating weight batch tightness degree in decarburizing annealing, thus, it is 91%~92% to control fill-in ratio, verified, the precision of fill-in ratio data can meet the needs of control high annealing end of reel volume length.
Description
Technical field
The invention belongs to iron and steel smelting technology field more particularly to a kind of sides for controlling high annealing coil of strip tail volume
Method.
Background technology
High magnetic induction grain-oriented silicon steel is a kind of important electrician soft magnetism functional material.Its technological process of production is to make steel, is true
Idle loop degassing refining, sheet billet continuous casting, heating of plate blank, hot rolling, normalizing pickling, 20 rolling systems, decarburizing annealing simultaneously coat oxidation
Magnesium, high annealing, stretching and leveling simultaneously coat insulation film.Strip is batched in decarburizing annealing and after applying magnesia, is packed into bell-type
Stove or annular furnace carry out high annealing, are annealed later in stretching and leveling unit uncoiling and coat insulating coating.Due to oxidation
Magnesium moisture evaporation in high-temperature annealing process, and chemically reacted with oxidation film, cause coil of strip bedding void to increase, coil of strip becomes
Pine, therefore easily there is uncoiling turriform in stretching and leveling unit uncoiling, cause the longer coil of strip of inner ring because tail can not be formed due to uncoiling
Steel scrap is rolled up, lumber recovery is seriously affected.
Decarburizing annealing volume coiling tension, magnesium oxide granularity distribution, magnesia coating weight, belt steel thickness are the high annealing ends of reel
The function of length is rolled up, but the measurement accuracy of magnesia coating weight is due to the fact that cannot be satisfied control needs.It emphasizes in the past
By controlling the magnesia coating weight and coiling tension of decarburizing annealing volume, length is rolled up to control the high annealing end of reel.Magnesia applies
There are technical difficulties for the accurate measurement of cloth amount, cannot be satisfied control accuracy requirement.
Generally there are two types of methods for the measurement of magnesia coating weight：
1) sample off-line measurement method in kind：This method is cut on the head for the decarburizing annealing volume for being coated with magnesia or tail portion
Sample, is cut into the sample of prescribed level by one piece of sample using steel-plate cutter.Then the weight for measuring sample, then by steel plate
The magnesia on surface is wiped, and measures the weight of sample again.The weight difference of the two is the weight of be coated with magnesia.It measures
The area of magnesia weight divided by 2 times of samples, the as coating weight of unit area magnesia.
Since magnesia easily falls off in sampling, sample transport and process, and the degree that falls off is difficult to control, and is measured
Error it is very big.It cannot be satisfied the requirement of control accuracy.
2) it is coated with flowmeter method online：This method use β rays or the infrared measurement machine, in operation strip up and down
Surface is scanned, and measures the coating weight of each magnesia, then forms an experiment curv.But in actual use, by
It is easy to fall off in magnesia, the magnesia pollution that the probe of strip lower surface coating weight is easily fallen off is measured, measurement error is made to increase
Greatly, measurement accuracy cannot equally meet control accuracy requirement.And it needs to pacify in producing line using the online coating flowmeter
Dress stablizes roller group to ensure that the focus of measuring instrument is overlapped with belt steel surface, and the use of stabilizing roller can aggravate falling off for magnesia, right
Strip quality causes harmful effect.
In addition, week can be used with paint roller by influencing the parameters such as the suitable painting roller pressure of magnesia coating weight, painting flow quantity
The variation of phase and magnesia type and change, therefore also can not be by be realized to oxygen to applying roller pressure and applying the control of flow quantity
Change accurately controlling for magnesium coating weight.
Therefore, magnesia coating weight both can not be measured accurately, also without accurately controlling means.
The tail volume data of high annealing volume need after decarburizing annealing is rolled up offline at least 7 days, could complete high annealing
Volume obtains after stretching and leveling unit completes uncoiling, cannot achieve timely feedback control.
Invention content
For the above problem in background technology, the main purpose of the present invention is to provide one kind for controlling high annealing
The method of coil of strip tail volume, utilizes fill-in ratio for the first time, realizes and is accurately controlled to high annealing coil of strip tail volume length.
To solve the above-mentioned problems, the present invention adopts the following technical scheme that：One kind is for controlling high annealing coil of strip tail volume
Method, include the following steps：Strip is batched in decarburizing annealing and after applying magnesia, and control fill-in ratio is 91%~92%,
Obtain decarburizing annealing coil of strip；The decarburizing annealing coil of strip is subjected to high annealing, carries out uncoiling later；
Wherein, the fill-in ratio φ=mActual measurement/(7.65t/m3×π×0.25×((D1 2-D2 2)×W)；
W is the width of the strip；mActual measurementFor the actual measurement weight of the decarburizing annealing coil of strip；D2For described batch when it is used
Slewing rollers outer diameter；D1For the coil of strip outer diameter of the decarburizing annealing coil of strip.
As a further preference, the D1=ω2D2/ω1In, the ω1It is described for the angular speed of coiler mandrel
ω2For the angular speed of coiling machine front steering roller.
As a further preference, described gradient is carried out using the coiling tension of 60MPa~70MPa when batching to batch.
As a further preference, described that sleeve is used when batching.
As a further preference, the high temperature anneal temperature is 1100~1300 DEG C, keeps the temperature 20~30h.
As a further preference, the control method of the fill-in ratio includes：Fill-in ratio number is controlled by adjusting parameter
Value, the parameter are selected from coiling tension size, coiling tension gradient, magnesia masking liquid proportioning, apply roller pressure, apply flow quantity, apply
Roller groove depth and painting roller diameter.
As a further preference, the control method of the fill-in ratio includes：When applying magnesia, increases and apply roller pressure
Fill-in ratio is improved, or increases masking liquid flow-reduction fill-in ratio.
As a further preference, the method further includes:Often volume decarburizing annealing coil of strip obtains corresponding fill-in ratio number
According to being monitored to fill-in ratio result using SPC (statistical Process Control) monodrome control figures.
The beneficial effects of the invention are as follows：The method that the present invention is used to control high annealing coil of strip tail volume, includes the following steps：
Strip is batched in decarburizing annealing and after applying magnesia, and control fill-in ratio is 91%~92%, obtains decarburizing annealing coil of strip；By institute
It states decarburizing annealing coil of strip and carries out high annealing, carry out uncoiling later.The concept of fill-in ratio is utilized in the present invention for the first time, is equal to de-
The ratio of carbon annealing coil actual weight and decarburizing annealing coil of strip theoretical weight, fill-in ratio be belt steel thickness, coil of strip coiling tension,
The parameters such as coiling tension taper, magnesia pressed density, magnesia coating weight batch the synthesis of tightness degree in decarburizing annealing
Reflection, thus, control fill-in ratio is 91%~92%, and verified, the precision of fill-in ratio data can meet control high annealing
The end of reel rolls up the needs of length.
Specific implementation mode
The present invention is by providing a kind of method for controlling high annealing coil of strip tail volume, for orientation silicon steel high annealing
Volume easily occurs the problem of being rolled up compared with long-tail in stretching and leveling unit uncoiling and provides a kind of control method, mainly solves high temperature and moves back
The problem of fiery coil of strip tail volume process control difficulties.
To solve the above-mentioned problems, the main thought of the embodiment of the present invention is：
The method that the embodiment of the present invention is used to control high annealing coil of strip tail volume, includes the following steps：Strip is moved back in decarburization
It fights and is batched after applying magnesia, control fill-in ratio is 91%~92%, obtains decarburizing annealing coil of strip；By the decarburizing annealing steel
Volume carries out high annealing, carries out uncoiling later；
Wherein, the fill-in ratio φ=mActual measurement/(7.65t/m3×π×0.25×((D1 2-D2 2)×W)；
Each measurement method of parameters is as follows in fill-in ratio formula：
mActual measurement--- the actual measurement weight of the decarburizing annealing coil of strip, unit t；
W --- strip width is transmitted to the unit, unit m after being measured by upper track unit；
D2--- the slewing rollers outer diameter used when batching, unit m are constant.
D1--- the decarburizing annealing coil of strip outer diameter for calculating gained, by the strip linear velocity phase of slewing rollers and strip outer ring
Together, i.e. D1ω1=D2ω2, derivation can obtain coil of strip outer diameter D1=ω2D2/ω1。
The fill-in ratio (φ) of decarburizing annealing volume can be by adjusting coiling tension size, coiling tension gradient, magnesia masking liquid
The parameters such as proportioning, painting roller pressure, painting flow quantity, paint roller groove depth and painting roller diameter are adjusted it, its control is made to exist
91%~92%, through actual verification, which can meet the needs of control high annealing end of reel volume length.
On the other hand, a fill-in ratio data can be measured after often volume decarburizing annealing coil of strip is offline, using dresses such as encoders
Set can automatically be quoted immediately by computer after the offline completion of coil of strip is weighed fill-in ratio (φ) as a result, and SPC monodromes can be used
Control figure is monitored fill-in ratio result, can be by adjusting above-mentioned parameter to fill-in ratio after finding that it is more than control limit
It is adjusted, such as：Fill-in ratio can be improved by increasing painting roller pressure, and fill-in ratio can be reduced by increasing painting flow quantity.
In addition, when carrying out coiling tension or magnesia type regulation experiment, can be opened using fill-in ratio as desired value to batching
Power size, coiling tension gradient, magnesia masking liquid proportioning, painting roller pressure, painting flow quantity, paint roller groove depth, painting roller diameter etc.
Parameter is adjusted, and is influenced caused by the high annealing end of reel rolls up length with reducing, and so as to shorten experimental period, reduces experiment damage
It loses.
In general, according to technological requirement, magnesia type, masking liquid proportioning, the thing before manufacture such as apply flow quantity, paint roller type
It first sets, when production, coating weight is adjusted by adjusting roller pressure is applied.When adjustment painting roller pressure is invalid merely, can also it adopt
It is adjusted with change paint roller cutting parameter, painting flow quantity etc..
In order to which above and other purpose, feature and the advantage of the present invention can be clearer and more comprehensible, number cited below particularly is implemented
Example, to illustrate the method for controlling high annealing coil of strip tail volume of the present invention.
High magnetic induction grain-oriented silicon steel used in the embodiment of the present invention smelts ingredient：C：0.05%~0.09%；Si：2.9%
~4.6%；Mn：0.05%~0.20%；S：0.005%~0.020%；Als：0.0225%~0.0325%；N：
0.0045%~0.0145%；Sn：0.01%~0.30%；Cr：0.01%~0.5%；Cu：0.01%~0.8%；Remaining is
Fe and inevitable impurity element.
The production process route of orientation silicon steel of the embodiment of the present invention includes：Steel-making, vacuum circulation degassing refining, slab connect
Casting, heating of plate blank, hot rolling, normalizing pickling, 20 rolling systems, decarburizing annealing simultaneously coat magnesia, high annealing, stretching and leveling simultaneously
Coat insulation film.
The method that the embodiment of the present invention is used to control high annealing coil of strip tail volume, to the production technology road of above-mentioned orientation silicon steel
Step in line carries out a series of adjustment, specifically includes：
(1) decarburizing annealing, steel plate carbon content is no more than 30ppm after decarburization；
(2) Nitrizing Treatment, atmosphere NH3、N2、H2Gaseous mixture, use nitriding temperature for 790~980 DEG C；
(3) it applies coated with the annealing separating agent based on magnesia；
(4) it uses the coiling tension of 60MPa~70MPa to carry out gradient to batch, sleeve is used when batching.
(5) using double roll coaters, paint roller is V-type cutting, applies 2~4m of flow quantity3/h.Roller pressure 10-14kN is applied, liquid stream is applied
Amount and painting roller pressure can be adjusted with fill-in ratio；It is adjusted using fill-in ratio as target to applying roller pressure, when fill-in ratio exceeds
When 91.0-92.0% target zones, feedback regulation is carried out.After production 72 hours, paint roller serious wear, adjustment applies roller pressure can not
So that fill-in ratio is returned to target zone, replace paint roller at this time, fill-in ratio can be made to come back to target zone, obtains decarburizing annealing steel
Volume.
(6) decarburizing annealing coil of strip being subjected to high annealing, high temperature section annealing temperature is 1100~1300 DEG C, heat preservation 20~
30h；
(7) uncoiling is carried out in stretching and leveling processing uncoiler.
The main technologic parameters and performance of each embodiment and comparative example are shown in Table 1；
Table 1：The main technologic parameters of embodiment and comparative example
There are apparent correlations with high annealing end of reel volume for fill-in ratio.The high annealing of comparative example 1 roll out showed it is brighter
Aobvious horn mouth, plate shape deteriorate；The high annealing of comparative example 2, which rolls out, has showed elephant foot defect, and plate shape deteriorates.
And embodiment is compared with comparative example as can be seen that using the side controlled as target using fill-in ratio from table 1
Formula can obtain shorter tail volume average length and smaller tail volume length standard is poor, and control is more stable.
Typical case's coil of strip outer diameter sample calculation of the embodiment of the present invention is shown in Table 2：
Table 2：Coil of strip outer diameter calculates data
Typical case's coil of strip fill-in ratio sample calculation of the embodiment of the present invention is shown in Table 3：
Table 3：Coil of strip fill-in ratio calculates data
Technical solution in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
The method that the embodiment of the present invention is used to control high annealing coil of strip tail volume, includes the following steps：Strip is moved back in decarburization
It fights and is batched after applying magnesia, control fill-in ratio is 91%~92%, obtains decarburizing annealing coil of strip；By the decarburizing annealing steel
Volume carries out high annealing, carries out uncoiling later.The concept of fill-in ratio is utilized in the present invention for the first time, and it is real to be equal to decarburizing annealing coil of strip
The ratio of border weight and decarburizing annealing coil of strip theoretical weight, fill-in ratio are belt steel thickness, coil of strip coiling tension, coiling tension cone
The parameters such as degree, magnesia pressed density, magnesia coating weight batch the concentrated expression of tightness degree in decarburizing annealing, thus,
It is 91%~92% to control fill-in ratio, verified, and the precision of fill-in ratio data can meet control high annealing end of reel volume length
Needs.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (7)
1. a kind of method for controlling high annealing coil of strip tail volume, it is characterised in that：Include the following steps：Strip is moved back in decarburization
It fights and is batched after applying magnesia, control fill-in ratio is 91%~92%, obtains decarburizing annealing coil of strip；By the decarburizing annealing steel
Volume carries out high annealing, carries out uncoiling later；
Wherein, the fill-in ratio φ=mActual measurement/(7.65t/m3×π×0.25×((D1 2-D2 2)×W)；
W is the width of the strip；mActual measurementFor the actual measurement weight of the decarburizing annealing coil of strip；D2For described batch when steering used
The outer diameter of roller；D1For the coil of strip outer diameter of the decarburizing annealing coil of strip.
2. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：The D1=ω2D2/ω1In, the ω1For the angular speed of coiler mandrel, the ω2For the angular speed of coiling machine front steering roller.
3. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：It is described when batching
Gradient is carried out using the coiling tension of 60MPa~70MPa to batch.
4. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：It is described when batching
Use sleeve.
5. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：The fill-in ratio
Control method include：Fill-in ratio numerical value is controlled by adjusting parameter, and the parameter is selected from coiling tension size, coiling tension
Gradient, magnesia masking liquid proportioning apply roller pressure, apply flow quantity, paint roller groove depth and apply roller diameter.
6. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：The fill-in ratio
Control method include：When applying magnesia, increases and apply roller pressure raising fill-in ratio, or increase masking liquid flow-reduction and account for product
Rate.
7. the method according to claim 1 for controlling high annealing coil of strip tail volume, it is characterised in that：The method is also
Including:Often volume decarburizing annealing coil of strip obtains corresponding fill-in ratio data, is carried out to fill-in ratio result using SPC monodromes control figure
Monitoring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810637013.8A CN108504852A (en) | 2018-06-20 | 2018-06-20 | A method of for controlling high annealing coil of strip tail volume |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810637013.8A CN108504852A (en) | 2018-06-20 | 2018-06-20 | A method of for controlling high annealing coil of strip tail volume |
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| CN108504852A true CN108504852A (en) | 2018-09-07 |
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| CN201810637013.8A Pending CN108504852A (en) | 2018-06-20 | 2018-06-20 | A method of for controlling high annealing coil of strip tail volume |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113801983A (en) * | 2020-06-15 | 2021-12-17 | 宝山钢铁股份有限公司 | Anti-bonding treatment method for thin oriented silicon steel |
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Application publication date: 20180907 |