CN105525087B - Method for improving quality of bottom layer of oriented silicon steel - Google Patents
Method for improving quality of bottom layer of oriented silicon steel Download PDFInfo
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- CN105525087B CN105525087B CN201510652940.3A CN201510652940A CN105525087B CN 105525087 B CN105525087 B CN 105525087B CN 201510652940 A CN201510652940 A CN 201510652940A CN 105525087 B CN105525087 B CN 105525087B
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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Abstract
The invention discloses a method for improving quality of a bottom layer of oriented silicon steel. The method comprises the following steps: (1) regulating chemical components of steel billet; (2) grinding the surface of a steel plate by use of a metal brush roller after pickling the steel plate; (3) using ultrasonic waves to clean the steel plate before continuous annealing; and flushing the steel plate with clear water after cleaning; (4) regulating conditions for recovery annealing; (5) adding titanium dioxide and magnesium carbonate into an isolating coating which takes magnesium oxide as a main component; and (6) regulating conditions for high-temperature annealing of a steel coil. The method disclosed by the invention can solve the problem that the bottom layer of the current oriented silicon steel is poor in quality or is unstable in quality, and has a very good industrial application prospect.
Description
Technical field
The present invention relates to orientation silicon steel production field, and in particular to a kind of method of raising orientation silicon steel bottom layer quality.
Technical background
In orientation silicon steel production process, (de- through steel-making, continuous casting steel billet, hot continuous rolling, pickling, cold rolling, continuous annealing
Carbon annealing, recovery annealing etc.) etc. after operation, high annealing need to be carried out, secondary recrystallization process is completed in the presence of inhibitor,
It is last to purify steel in high holding stage, to obtain good magnetic.Before high annealing, composition need to be coated in steel strip surface
Barrier coat based on magnesia (MgO).Barrier coat not only can prevent steel band from bonding is produced in high annealing, heavier
That what is wanted is the SiO in the high annealing secondary temperature elevation stage, when temperature reaches more than 900 DEG C, on magnesia and steel strip surface2Oxygen
Change film and chemical reaction occurs, generate composition with magnesium silicate (Mg2SiO4) based on glassy films.The second best in quality nature of glass is thin
Film is adhering closely to surface of steel plate, not only with well insulation and antirust ability, and because its coefficient of expansion it is less than silicon steel, energy
Certain tension force is produced to steel strip surface, with reducing steel plate magnetostriction and significantly reduce the effect of steel plate iron loss.This layer of glass
Glass film hardness is high, is firmly combined with steel band, is the preferable bottom of silicon steel insulating coating, therefore normally referred to as magnesium silicate bottom
(or bottom).The quality of bottom also has close relationship with the presentation quality of product, and such as bottom layer quality is good, then silicon strip is applied
Insulating coating and after drying, sintering, surface color is uniform, with special gloss；As bottom it is bad, then steel band irregular colour,
Color and luster is dim, or even produces the defects such as dew crystalline substance, bright spot.
In sum, the bottom layer quality of orientation silicon steel, the magnetic, presentation quality, insulaion resistance and antirust to orientation silicon steel
Ability etc. is respectively provided with material impact.However, affect the factor of bottom layer quality extremely complex, the chemical analysis of material, steel strip surface
The composition of oxide-film that produces during continuous annealing of cleanliness factor, steel band and thickness, the quality of magnesia and aquation rate, every
The composition and its quality of additive, the coating quality of barrier coat and high-temperature annealing process etc. in coating, to most end form
Into bottom layer quality there is close relationship.Therefore, the quality of bottom is improved, is to need emphasis to capture in orientation silicon steel production process
One of key technology.Especially for the production of cupric low-temperature oriented silicon steel, due to the particularity of its technique, in high annealing
Before the annealing temperature that carries out it is relatively low, be difficult to generate preferable SiO in steel strip surface2Film, thus it is difficult in the high annealing stage
To generate the magnesium silicate bottom that quality is good, thickness is suitable, so as to generate great shadow to the quality of orientation silicon steel finished product
Ring.
The content of the invention
It is an object of the invention to solve that current orientation silicon steel bottom layer quality is present it is unstable or of poor quality the problems such as,
A kind of method for improving orientation silicon steel magnesium silicate bottom layer quality is provided, the method can enhance product performance.
Above-mentioned purpose of the present invention is achieved by the following technical programs：
A kind of method for improving orientation silicon steel bottom layer quality, comprises the steps：
(1) steel billet chemical composition is adjusted：Als is 0.015～0.022wt%, and meets Als/N=1.5～2.5；Sn is
0.02～0.10wt%；Sb is 0.01～0.05wt%；Cr is 0.006～0.05wt%；V is 0.001～0.02wt%；Cu is
0.40～0.60wt%；
(2) steel plate after pickling, is polished surface of steel plate with metal brush roller, removes the internal oxidition of surface of steel plate
Layer.A diameter of 200～the 400mm of brush roller, a diameter of 0.2～0.8mm of brush filament, rotating speed is 200～2000rpm；
(3) before continuous annealing steel plate is cleaned with ultrasonic wave, after ultrasonic cleaning steel plate is rinsed with clear water, and
The pH value for making surface of steel plate residual water is 7～9, then unnecessary water is squeezed out with coarse squeeze roll；
(4) annealing temperature be 500～600 DEG C, protective atmosphere be humidification hydrogen nitrogen mixed gas, humidification temperature be 50～
70℃；After recovery annealing, steel band is cooled to 100～300 DEG C with the speed of 5～30 DEG C/S, then quenches into 30～100 DEG C of water
In, 2～15 seconds time；
(5) TiO is added in Main Ingredients and Appearance is for the barrier coat of silicon-steel grade magnesium oxide2And MgCO3Compound, wherein TiO2
Addition is 1.0～2.0 times of Als mass in raw material, and in its particle diameter distribution 80% grain diameter≤1 μm；MgCO3's
Addition is 0.5～10wt% of magnesia quality；Moisture content is 1.5～6% after barrier coat drying；
(6) in coil of strip high-temperature annealing process, after the minimum living temperature with 600～700 DEG C that is rapidly heated, with 10～25
DEG C/speed of S is warming up to 800～950 DEG C, is incubated 2～15 hours, and control furnace atmosphere intrinsic standoff ratio PH2O/PH2≤0.05；Protect
Temperature continues to be to slowly warm up to high holding temperature after terminating, and carries out purification steel.
Used as a kind of optimal technical scheme, in above-mentioned steps (1), the adjustment steel billet chemical composition is：Als is 0.018
～0.02wt%, and meet Als/N=1.5～2.5；Sn is 0.02～0.10wt%；Sb is 0.01～0.05wt%；Cr is
0.006～0.05wt%；V is 0.001～0.02wt%；Cu is 0.40～0.60wt%.
Used as a kind of optimal technical scheme, in above-mentioned steps (2), a diameter of 200～400mm of the brush roller, brush filament is straight
Footpath is 0.2～0.8mm, and rotating speed is 200～2000rpm.
It is described to be cleaned by ultrasonic the hydroxide that liquid is 0.5～5wt% in above-mentioned steps (3) as a kind of optimal technical scheme
Sodium solution, and add the sodium metasilicate of 0.2～2wt%；The surface roughness of the squeeze roll is Ra6.3～100.
As a kind of optimal technical scheme, in above-mentioned steps (4), in recovery annealing protective atmosphere oxygen content be 50～
500ppm。
Used as a kind of optimal technical scheme, in above-mentioned steps (6), the high holding temperature is 1200 DEG C.
Steel billet, steel plate, coil of strip, the steel band mentioned in full text of the invention is for the title of steel plate in different production processes
Meaning, it be really same article to refer to.
Compared with prior art, the present invention has the advantages that：
(1) present invention is had the advantage that by adjusting steel billet chemical composition：Dissolved aluminum (Als) is used as composition orientation silicon steel
The element of major inhibitors AlN, the impact to magnetic is apparent.Within the specific limits, improving Als contents can significantly reduce orientation
The iron loss of silicon steel, but Als too high levels, in high-temperature annealing process, the aluminium in steel is diffused into steel strip surface, SiO2Film is also
Original, makes bottom layer quality degenerate.In the orientation silicon steel production decision with AlN as major inhibitors, Als contents are generally specified as
0.02～0.03%, preferred value is 0.025～0.028%, and oriented silicon steel bearing copper preferred value is 0.020～0.025%.This
The bright content for reducing Als, preferred value is 0.018～0.02%, to reduce impact of the aluminium to bottom.To avoid magnetic from declining,
Addition tin, antimony, vanadium etc. can strengthen the element of restraint；Tin (Sn) can complete solid solution at a lower temperature, in decarburizing annealing
Afterwards along first crystal particle crystal boundary segregation, secondary nucleus increasing number is made, strengthen restraint, it is ensured that secondary recrystallization is perfect.Therefore add
Plus tin can overcome the disadvantages that the problem for reducing causing AlN restraints to decline after Als.It is rich in surface of steel plate in decarburization but Theil indices are too high
Collection, hinders SiO2Film is formed, and causes bottom bad, therefore Sn contents are controlled below 0.10%；The effect of antimony (Sb) and tin
It is similar；Steel plate oxidation when chromium (Cr) can promote annealing, and Mg when promoting high annealing2SiO4The formation of bottom, can obviously improve bottom
Layer quality；Vanadium (V) is combined with N, as auxiliary inhibitor secondary recrystallization can be made more perfect, improves product magnetic；Copper (Cu) is
Constitute Cu2The element of S inhibitor, while copper can also reduce the concentration of surface of steel plate tin, improves bottom layer quality；
(2) present invention thoroughly removes the internal oxidation layer that surface of steel plate is difficult to be removed with pickling mode, so as to reach following effect
Really：1) decarburization effect is improved；2) reduce cold rolling difficulty, improve strip shape quality, so as to improve the Painting effect of barrier coat, improve
The uniformity of bottom；3) Al in internal oxidation layer is avoided2O3Deng destruction of the compound to bottom；
(3) present invention can improve steel plate table using being cleaned by ultrasonic with degreasing more more preferable than conventional brush and scavenging effect
The cleannes in face, improve bottom layer quality.Steel plate is set to retain alkalescent after cleaning, and using shaggy squeeze roll, it is therefore an objective to
Surface of steel plate is allowed to remain a small amount of silicate and NaOH.Silicate can accelerate to form SiO during continuous annealing2With
Fe2SiO4, improve bottom layer quality；There is a small amount of sodium ion and be conducive to improving bottom tack and uniformity in surface of steel plate；
(4) because the oxide-film formed during decarburizing annealing is ground thin in secondary cold-rolling, cracking is also produced sometimes and is come off.This
Invent to improve bottom layer quality, recovery annealing is carried out to steel band using the atmosphere of humidification, allow the steel strip surface can be in relatively low reply
At a temperature of form preferable SiO2And Fe2SiO4Oxide-film.Steel band is quenched in water after annealing, it is therefore an objective to allow steel strip surface to enter one
Step oxidation, makes oxide-film have suitable composition and thickness, and being beneficial to improves the quality of bottom；
(5)TiO2Gradually decompose at high temperature, discharge oxygen atom, combined with the Al that surface is diffused in steel, prevent Al from hampering
Hinder the formation of magnesium silicate bottom.TiO2Decomposition makes Ti penetrate in steel can cause iron loss to increase, and magnetic degenerates, using excessive TiO2
Also result in and rise on production cost.Therefore TiO during the content according to Als in steel of the invention is to determine interleaving agent2Content, to reach
To optimum effect.The present invention adopts the less TiO of particle diameter2, its dispersiveness and activity can be improved, advantageously form preferable bottom
Layer.Magnesium carbonate decomposition temperature is 540 DEG C, is rapidly heated in coil of strip high annealing and discharge gas with minimum living thermophase, accelerates coil of strip
Between each circle in barrier coat water of constitution discharge, it is to avoid destruction of the water to bottom under high temperature, reduce the generation of bottom defect；
(6) between the minimum living thermophase and high holding stage of conventional high temperature annealing, increase a middle holding stage, make steel
The a certain temperature rolled up between 800～950 DEG C is carried out in insulating process, the Fe that surface of steel plate is generated in continuous annealing2SiO4One
SiO is reduced under the conditions of fixed temperature and intrinsic standoff ratio2, so that SiO in surface of steel plate oxide-film2Content increase, be conducive to
Improve the quality of bottom.Measure of the present invention simultaneously can be such that coil of strip internal and external temperature further homogenizes, and make coil of strip in homogeneous temperature
Secondary recrystallization is carried out under state and magnesium silicate bottom, improve product quality is formed.
Specific embodiment
With reference to embodiment, the present invention is further elaborated.But embodiment does not do any type of to the present invention
Limit.
Embodiment 1
1. in steel billet chemical analysis, it is respectively with the content (percentage by weight) of the influential chemical element of bottom layer quality：
Als：0.019%th, Als/N=2.0；Sn：0.055%；Sb：0.02%；Cr：0.02%；V：0.002%；Cu：0.51%.
2. Jing after the operations such as steel-making, continuous casting steel billet, hot rolling, then steel plate pickling in hydrochloric acid is with roller diameter
The a diameter of 0.5mm of 300mm, brush filament, rotating speed are polished surface of steel plate for the metal plug roller of 1000rpm, are thoroughly removed
The internal oxidation layer of surface of steel plate.
3. steel plate carries out continuous decarburizing annealing Jing after once cold rolling, carries out continuous recovery annealing Jing after secondary cold-rolling, continuously
Carry out degreasing, cleaning before annealing to steel plate with ultrasonic wave, ultrasonic cleaning liquid is 1.5% sodium hydroxide solution, and adds 0.5%
Sodium metasilicate.The ultrasonic cleaning time is 15 seconds, then steel plate is rinsed with clear water, the PH of surface of steel plate residual water after flushing
It is worth for 8.0, then water unnecessary on steel plate is squeezed out with the squeeze roll that surface roughness is Ra100.
4. annealing temperature is 560 DEG C, and protective atmosphere is the hydrogen nitrogen mixed gas of humidification, and humidification temperature is 65 DEG C, protection
Oxygen content is 100ppm in atmosphere.After recovery annealing, steel band is cooled to 220 DEG C with the speed of 13 DEG C/S, then quenches into 70 DEG C
In water, 6 seconds time.
5. after recovery annealing, in surface of steel plate wet coating barrier coat.The Main Ingredients and Appearance of barrier coat is silicon-steel grade magnesium oxide,
And add TiO2And MgCO3Deng compound.Wherein TiO2Addition is 1.3 times of Als mass in raw material, and its particle diameter distribution
In 80% grain diameter≤1 μm；MgCO3Addition be 2%.Moisture content is 3.1% after barrier coat drying.
6. in coil of strip high-temperature annealing process, after the minimum living temperature with 650 DEG C that is rapidly heated, with the speed liter of 20 DEG C/S
Temperature to 880 DEG C, in furnace atmosphere intrinsic standoff ratio PH2O/PH26 hours are incubated on the premise of≤0.04.Insulation continues slow liter after terminating
The paramount holding temperature (about 1200 DEG C) of temperature, carries out purification steel.
Embodiment 2
1. in steel billet chemical analysis, it is respectively with the content (percentage by weight) of the influential chemical element of bottom layer quality：
Als：0.018%th, Als/N=2.0；Sn：0.055%；Sb：0.02%；Cr：0.02%；V：0.002%；Cu：0.51%.
2. Jing after the operations such as steel-making, continuous casting steel billet, hot rolling, then steel plate pickling in hydrochloric acid is with roller diameter
The a diameter of 0.5mm of 300mm, brush filament, rotating speed are polished surface of steel plate for the metal plug roller of 1000rpm, are thoroughly removed
The internal oxidation layer of surface of steel plate.
3. steel plate carries out continuous decarburizing annealing Jing after once cold rolling, carries out continuous recovery annealing Jing after secondary cold-rolling, continuously
Carry out degreasing, cleaning before annealing to steel plate with ultrasonic wave, ultrasonic cleaning liquid is 1.5% sodium hydroxide solution, and adds 1.5%
Sodium metasilicate.The ultrasonic cleaning time is 10 seconds, then steel plate is rinsed with clear water, the PH of surface of steel plate residual water after flushing
It is worth for 7.5, then water unnecessary on steel plate is squeezed out with the squeeze roll that surface roughness is Ra50.
4. annealing temperature is 520 DEG C, and protective atmosphere is the hydrogen nitrogen mixed gas of humidification, and humidification temperature is 58 DEG C, protection
Oxygen content is 300ppm in atmosphere.After recovery annealing, steel band is cooled to 190 DEG C with the speed of 25 DEG C/S, then quenches into 85 DEG C
In water, 10 seconds time.
5. after recovery annealing, in surface of steel plate wet coating barrier coat.The Main Ingredients and Appearance of barrier coat is silicon-steel grade magnesium oxide,
And add TiO2And MgCO3Deng compound.Wherein TiO2Addition is 1.2 times of the quality of Als in raw material, and its particle diameter
80% grain diameter≤1 μm in distribution；MgCO3Addition be 1%.Moisture content is 2.0% after barrier coat drying.
6. in coil of strip high-temperature annealing process, after the minimum living temperature with 680 DEG C that is rapidly heated, with the speed liter of 20 DEG C/S
Temperature to 830 DEG C, in furnace atmosphere intrinsic standoff ratio PH2O/PH28 hours are incubated on the premise of≤0.02.Insulation continues slow liter after terminating
The paramount holding temperature (about 1200 DEG C) of temperature, carries out purification steel.
Embodiment 3
1. in steel billet chemical analysis, it is respectively with the content (percentage by weight) of the influential chemical element of bottom layer quality：
Als：0.018%th, Als/N=2.1；Sn：0.03%；Sb：0.03%；Cr：0.01%；V：0.002%；Cu：0.58%.
2. Jing after the operations such as steel-making, continuous casting steel billet, hot rolling, then steel plate pickling in hydrochloric acid is with roller diameter
The a diameter of 0.8mm of 250mm, brush filament, rotating speed are polished surface of steel plate for the metal plug roller of 1000rpm, are thoroughly removed
The internal oxidation layer of surface of steel plate.
3. steel plate carries out continuous decarburizing annealing Jing after once cold rolling, carries out continuous recovery annealing Jing after secondary cold-rolling, continuously
Carry out degreasing, cleaning before annealing to steel plate with ultrasonic wave, it is 3% sodium hydroxide solution to be cleaned by ultrasonic liquid, and adds 2% silicon
Sour sodium.The ultrasonic cleaning time is 15 seconds, then steel plate is rinsed with clear water, and the pH value of surface of steel plate residual water is after flushing
8.5, then water unnecessary on steel plate is squeezed out with the squeeze roll that surface roughness is Ra6.3.
4. annealing temperature is 540 DEG C, and protective atmosphere is the hydrogen nitrogen mixed gas of humidification, and humidification temperature is 70 DEG C, protection
Oxygen content is 200ppm in atmosphere.After recovery annealing, steel band is cooled to 270 DEG C with the speed of 10 DEG C/S, then quenches into 50 DEG C
In water, 3 seconds time.
5. after recovery annealing, in surface of steel plate wet coating barrier coat.The Main Ingredients and Appearance of barrier coat is silicon-steel grade magnesium oxide,
And add TiO2And MgCO3Deng compound.Wherein TiO2Addition is 1.7 times of quality of Als in raw material, and its particle diameter point
80% grain diameter≤1 μm in cloth；MgCO3Addition be 3%.Moisture content is 3.9% after barrier coat drying.
6. in coil of strip high-temperature annealing process, after the minimum living temperature with 650 DEG C that is rapidly heated, with the speed liter of 15 DEG C/S
Temperature to 930 DEG C, in furnace atmosphere intrinsic standoff ratio PH2O/PH210 hours are incubated on the premise of≤0.05.Insulation continues slow liter after terminating
The paramount holding temperature (about 1200 DEG C) of temperature, carries out purification steel.
Comparative example 1
1. in steel billet chemical analysis, it is respectively with the content (percentage by weight) of the influential chemical element of bottom layer quality：
Als：0.023%th, Cu：0.49%th, Cr：0.008%, without Sn, Sb and V.
2. Jing after the operations such as steel-making, continuous casting steel billet, hot rolling, steel plate pickling in hydrochloric acid, the interior oxygen after pickling not to remaining
Change layer to be purged.
3. steel plate carries out continuous decarburizing annealing Jing after once cold rolling, carries out continuous recovery annealing Jing after secondary cold-rolling, continuously
Before annealing steel plate is sprayed with 2% sodium hydroxide solution and cleaned with brush roll, then with a large amount of clear water to surface of steel plate
It is rinsed, the pH value of surface of steel plate residual water is 6.8 after flushing.Then it is not more than the squeeze roll of Ra3.2 with surface roughness
Water on steel plate is extracted.
4. recovery annealing protective atmosphere is dry hydrogen nitrogen mixed gas, oxygen content ＜ 5ppm.After recovery annealing, steel band do not quench into
In water.
5. after recovery annealing, in surface of steel plate wet coating barrier coat.The Main Ingredients and Appearance of barrier coat is silicon-steel grade magnesium oxide,
And add TiO2。TiO2Addition is the 5% of content of magnesia, and granularity is 320 mesh.Moisture content is after barrier coat drying
1.4%.
6. in coil of strip high-temperature annealing process, through being rapidly heated with after minimum living temperature, it is straight with fixed secondary temperature elevation speed
The paramount holding temperature (about 1200 DEG C) of intensification is connect, the secondary temperature elevation process between the gentle high insulation of minimum living is not incubated.
Implementation result:
Claims (5)
1. it is a kind of improve orientation silicon steel bottom layer quality method, it is characterised in that methods described comprises the steps：
（1）Adjustment steel billet chemical composition：Als is 0.015～0.022wt%, and meets Als/N=1.5～2.5；Sn be 0.02～
0.10wt%；Sb is 0.01～0.05wt%；Cr is 0.006～0.05wt%；V is 0.001～0.02wt%；Cu be 0.40～
0.60wt%；
（2）Steel plate after pickling, is polished surface of steel plate with metal brush roller, removes the internal oxidation layer of surface of steel plate;
A diameter of 200～the 400mm of brush roller, a diameter of 0.2～0.8mm of brush filament, rotating speed is 200～2000rpm；
（3）Before continuous annealing steel plate is cleaned with ultrasonic wave, after ultrasonic cleaning steel plate is rinsed with clear water, and make steel
The pH value of plate surface residual water is 7～9, then unnecessary water is squeezed out with squeeze roll；
（4）Annealing temperature is 500～600 DEG C, and protective atmosphere is the hydrogen nitrogen mixed gas of humidification, and humidification temperature is 50～70
℃；After recovery annealing, steel band is cooled to 100～300 DEG C with the speed of 5～30 DEG C/S, then quenches in 30～100 DEG C of water,
2～15 seconds time；
（5）Add TiO in Main Ingredients and Appearance is for the barrier coat of silicon-steel grade magnesium oxide2And MgCO3Compound, wherein TiO2Addition
Amount is 1.0～2.0 times of Als mass in raw material, and in its particle diameter distribution 80% grain diameter≤1 μm；MgCO3Addition
Measure as 0.5～10wt% of magnesia quality；Moisture content is 1.5～6% after barrier coat drying；
（6）In coil of strip high-temperature annealing process, after the minimum living temperature with 600～700 DEG C that is rapidly heated, with 10～25 DEG C/S
Speed be warming up to 800～950 DEG C, be incubated 2～15 hours, and control furnace atmosphere intrinsic standoff ratio PH2O/PH2≤0.05；Insulation knot
Continue to be to slowly warm up to 1200 DEG C of high holding temperature after beam, carry out purification steel.
2. it is according to claim 1 improve orientation silicon steel bottom layer quality method, it is characterised in that step（1）In, it is described
Adjusting steel billet chemical composition is：Als is 0.018～0.02wt%, and meets Als/N=1.5～2.5；Sn be 0.02～
0.10wt%；Sb is 0.01～0.05wt%；Cr is 0.006～0.05wt%；V is 0.001～0.02wt%；Cu be 0.40～
0.60wt%。
3. it is according to claim 1 improve orientation silicon steel bottom layer quality method, it is characterised in that step（2）In, it is described
A diameter of 200～the 400mm of brush roller, a diameter of 0.2～0.8mm of brush filament, rotating speed is 200～2000rpm.
4. it is according to claim 1 improve orientation silicon steel bottom layer quality method, it is characterised in that step（3）In, it is described
It is the sodium hydroxide solution of 0.5～5wt% to be cleaned by ultrasonic liquid, and adds the sodium metasilicate of 0.2～2wt%；The surface of the squeeze roll
Roughness is Ra6.3～100.
5. it is according to claim 1 improve orientation silicon steel bottom layer quality method, it is characterised in that step（4）In, reply
Oxygen content is 50～500ppm in Annealing Protection atmosphere.
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| CN106399856B (en) * | 2016-09-28 | 2018-07-27 | 武汉科技大学 | A method of improving silicon containing steel surface quality |
| CN107675190A (en) * | 2017-08-21 | 2018-02-09 | 全球能源互联网研究院有限公司 | A kind of method for improving ultra-thin magnetic property of oriented silicon steel |
| CN107858494B (en) * | 2017-11-23 | 2019-07-16 | 武汉钢铁有限公司 | The production method of low temperature high magnetic induction grain-oriented silicon steel |
| CN109628717B (en) * | 2018-12-10 | 2020-09-29 | 首钢智新迁安电磁材料有限公司 | Method for manufacturing low-temperature high-magnetic-induction oriented silicon steel with excellent bottom layer |
| CN110791635A (en) * | 2019-09-30 | 2020-02-14 | 鞍钢股份有限公司 | Method for preparing high-magnetic-induction oriented silicon steel |
| CN111943262A (en) * | 2020-08-24 | 2020-11-17 | 山西银圣科技有限公司 | Preparation method of titanium dioxide special for oriented silicon steel |
| CN114622070A (en) * | 2022-03-11 | 2022-06-14 | 安阳钢铁股份有限公司 | Production method for improving adhesion of oriented silicon steel coating |
| CN115505822B (en) * | 2022-09-23 | 2023-12-01 | 无锡普天铁心股份有限公司 | Method for improving grain uniformity of oriented silicon steel and oriented silicon steel prepared by method |
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| CN101824582B (en) * | 2009-04-10 | 2011-07-20 | 广东盈泉钢制品有限公司 | Oriented electrical steel plate band adopting multivariate inhibiting agent and production method thereof |
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