CN109622619A - The method and its product of cold continuous rolling production high grade non-oriented electrical steel - Google Patents
The method and its product of cold continuous rolling production high grade non-oriented electrical steel Download PDFInfo
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- CN109622619A CN109622619A CN201811614347.XA CN201811614347A CN109622619A CN 109622619 A CN109622619 A CN 109622619A CN 201811614347 A CN201811614347 A CN 201811614347A CN 109622619 A CN109622619 A CN 109622619A
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- cold
- rack
- strip
- high grade
- oriented electrical
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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
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- 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
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses the methods and its product of a kind of cold continuous rolling production high grade non-oriented electrical steel, its method is to carry out heating to strip before cold rolling entrance its temperature is made to rise to 80-100 DEG C, its temperature is set to rise to 100-120 DEG C the heating of strip again in cold rolling entrance, wherein, cold-rolling equipment carries out cold rolling using 18 roller, six Stands Cold Tandem Mill group.Its high production efficiency, and strip raw material enbrittles at room temperature and has side to split presence, cause strip tension large area in cold rolling that disconnected band easily occurs, and by strip before cold rolling heat temperature raising to reduce its brittleness, the probability of disconnected band occurs to reduce strip in cold rolling entrance, and the muzzle velocity maximum of the outlet end strip in 18 roller, six Stands Cold Tandem Mill group can reach 800m/mi1n, and the thickness of its products obtained therefrom can be in 0.27mm or less.
Description
Technical field
The invention belongs to non-oriented electrical steel cold continuous rolling technical field, in particular to a kind of cold continuous rolling production thickness≤
The method of 0.27mm high grade non-oriented electrical steel.
Background technique
Currently, the master operation of cold rolling non-oriented electrical steel includes normalizing pickling process, cold rolling process, decarburizing annealing work
Sequence, trimming bundling process and packaging packing process, wherein determine the mainly cold rolling process of electrical sheet thickness, wherein thin gauge
High grade non-oriented electrical steel is widely used in large-size machine, reactor and magnetic amplifier, small power transformer, compression electromechanics
The manufacture such as machine and electric motor of automobile, domestic cold rolling high grade non-oriented electrical steel annual output are only able to satisfy apparent demand amount about 15%,
The energy-efficient product largely needs import.Since the silicone content of high grade non-oriented electrical steel higher (2.8-3.5%) causes
Resistance of deformation is big when cold rolling and strip edge is split, while needing to be thinned plate thickness to reduce high frequency iron loss, and the prior art can only stablize life
Produce 0.27mm or more thickness high grade non-oriented electrical steel, for market in urgent need 0.25mm, 0.2mm thin slab product not yet
There is relatively stable production method.Although thin gauge may be implemented in the existing reversible singlestandmill of 20 roller high grade non-oriented
The production of electrical sheet, but its roll change is frequent, disadvantage that cause production efficiency low low with lumber recovery that flatness defect is more can not gram
Clothes.When being produced according to six roller tandem mill of UCMW, the roll-force as caused by its work roll diameter is larger is excessive and generate
Side split and cause disconnected band problem, which still can not achieve the high speed of thin gauge (being less than 0.27mm) high grade non-oriented electrical steel
Steady production.
Summary of the invention
In order to solve the above-mentioned technical problem, one of the objects of the present invention is to provide a kind of cold continuous rollings to produce the high trade mark without taking
To the method for electrical sheet, finished product thickness≤0.27mm, and this method high production efficiency can be realized.
In order to solve the above-mentioned technical problem, technical scheme is as follows: a kind of cold continuous rolling production is high grade non-oriented
The method of electrical sheet carries out cold rolling to strip using 18 roller, six Stands Cold Tandem Mill group, wherein to strip before cold rolling entrance
Carrying out heating makes its temperature rise to 80-100 DEG C, and carrying out heating to strip again in cold rolling entrance makes its temperature rise to 100-
120℃。
The beneficial effect of above-mentioned technical proposal is: its high production efficiency, and strip raw material enbrittles at room temperature and
There is side to split presence, strip tension large area in cold rolling caused easily to occur disconnected band, and by strip before cold rolling heat temperature raising
To reduce its brittleness, thus reduce the probability that disconnected band occurs in cold rolling entrance for strip, and in 18 roller, six Stands Cold Tandem Mill
The muzzle velocity maximum of the outlet end strip of group can reach 800m/min.
It is to be carried out to strip using electromagnetic induction heater with entrance before cold rolling entrance in above-mentioned technical proposal
Heating.
The beneficial effect of above-mentioned technical proposal is: heating is convenient, and heating efficiency is high, takes up little area, temperature control precision
It is high and pollution-free to strip.
The work roll diameter of the Stands Cold Tandem Mill group of 18 roller six described in above-mentioned technical proposal is 140-170mm.
The beneficial effect of above-mentioned technical proposal is: its structure is simple.
Every group in the Stands Cold Tandem Mill group of 18 roller six described in above-mentioned technical proposal in the first rack and the second rack
Two working rolls opposing upper and lower are antisymmetric single taper roller.
The beneficial effect of above-mentioned technical proposal is: control is thinned convenient for the effective steel edge portion that carries out.
The taper of the roller of list taper described in above-mentioned technical proposal is 1/200-1/600.
The beneficial effect of above-mentioned technical proposal is: its structure is simple, can the thinned control of significantly more efficient progress steel edge portion
System.
Work in the Stands Cold Tandem Mill group of 18 roller six described in above-mentioned technical proposal in the first rack to the 4th rack
The surface roughness Ra of roller is 0.8-1.0 μm, and the surface roughness Ra of the working roll of the 5th rack to the 6th rack is 0.4-0.5
μm。
The beneficial effect of above-mentioned technical proposal is: so that the belt steel surface after cold continuous rolling is more smooth.
Working roll described in above-mentioned technical proposal uses D2 material, hardness HRC60-62.
The beneficial effect of above-mentioned technical proposal is: it is with preferable wearability and moderate toughness.
The Stands Cold Tandem Mill group of 18 roller six described in above-mentioned technical proposal uses emulsion to carry out work during the rolling process
Skill lubrication and cooling, so that belt steel temperature is 150-250 DEG C at the first rack to the 5th rack outlet；6th rack outlet band
Steel temperature is 80-150 DEG C.
The beneficial effect of above-mentioned technical proposal is: so that the temperature-controllable of strip, while being convenient for post annealed.
The first rack reduction ratio is 35-37.5% in the Stands Cold Tandem Mill group of 18 roller six described in above-mentioned technical proposal,
Second rack reduction ratio is 32-34.5%, and third rack reduction ratio is 30-33.5%, and the 4th rack reduction ratio is 28-33%,
5th rack reduction ratio is 27-31%, and the 6th rack reduction ratio is 16-28%.
The beneficial effect of above-mentioned technical proposal is: gradually the thickness of strip is reduced so that its while thinning not
Influence the integrality of strip.
The second object of the present invention is to provide a kind of method by above-mentioned cold continuous rolling production high grade non-oriented electrical steel
Obtained electrical sheet, thickness can be lower than 0.27mm.
Specific embodiment
Embodiment 1:
Using a kind of method of cold continuous rolling production high grade non-oriented electrical steel of the present invention, cold rolling silicone content 3.1%, thickness
The hot rolled coil next life finished product thickness 0.2mm of 2.0mm, the high grade non-oriented electrical steel of width 1220mm, continuous cold rolling process
Are as follows:
In entrance, it is strip and laser that the hot rolled coil by normalizing pickling, which alternates uncoiling by double uncoiler uncoilings,
Welder (is linked together) the magnetic tape trailer and tape leader of a upper coiled strip steel and next coiled strip steel are carried out welding, is set in cold continuous rolling
By first passing through electromagnetic induction strip heating device before standby entrance, belt steel temperature is improved to 80-100 DEG C, preferably from room temperature
It is 85-95 DEG C；Strip, again by electromagnetic induction heater, belt steel temperature is improved to 100-120 after entry loop
DEG C, preferably 105-115 DEG C, since temperature can decline strip in entry loop operational process, enter milling train at room temperature
Due to its black brittleness, the band that breaks easily occurs for processing hardening under aximal deformation value when section rolling, therefore in cold rolling entrance by strip temperature
Degree is improved again to 100-120 DEG C, and brittleness is greatly reduced, while reducing resistance of deformation of the strip in rolling, further
The probability that disconnected band occurs in milling train section for strip is reduced, wherein milling train uses 18 roller, six Stands Cold Tandem Mill group；
In milling train section, the work roll diameter of 18 roller, six Stands Cold Tandem Mill group is 140-170mm, preferably 160mm,
Barrel length is preferably 1450mm, and material uses the D2 material of hardness HRC60-62, wherein 18 roller, six rack is cold
The surface roughness Ra of working roll in Continuous mill train in the first rack to the 4th rack is 0.8-1.0 μm, the 5th rack to the
The surface roughness Ra of the working roll of six racks is 0.4-0.5 μm, it is preferred that wherein, the work of the first rack to the 6th rack
The surface roughness Ra of roller is respectively 1.0 μm, 0.98 μm, 0.95 μm, 0.9 μm, 0.5 μm, 0.4 μm；Wherein 18 roller, six rack
Tandem mills carry out cold continuous rolling, the first rack reduction ratio in 18 roller, the six Stands Cold Tandem Mill group using once cold rolling method
For 35-37.5%, the second rack reduction ratio is 32-34.5%, and third rack reduction ratio is 30-33.5%, the pressure of the 4th rack
Rate is 28-33%, and the 5th rack reduction ratio is 27-31%, and the 6th rack reduction ratio is 16-28%, it is preferred that the first rack is extremely
6th rack reduction ratio is respectively 36%, 33.5%, 32.5%, 31.8%, 29.7%, 26.8%, so that total reduction is
90%；
The emulsification flow quantity of first to fourth rack is respectively controlled in 4000-5000L/min in the operation of rolling, and the 5th to the 6th
The emulsification flow quantity of rack is respectively controlled in 3500-4500L/min；The outlet of first rack to the 6th rack configures Wen Yi pairs of plate
Belt steel temperature measures, and then is accurately controlled emulsification flow quantity, so that at the first rack to the 5th rack outlet
Belt steel temperature is 150-250 DEG C；6th rack outlet belt steel temperature is 80-150 DEG C, it is preferred that by the first rack to the 6th machine
It is being 153 DEG C, 204 DEG C, 233 DEG C, 230 DEG C, 203 DEG C, 105 DEG C that frame outlet belt steel temperature controls respectively；
Steel edge portion being carried out in the operation of rolling, control being thinned, the first and second rack working roll tapers are respectively 1/200 (its
Bore a length of 200mm) and 1/400 (it bores a length of 250mm), it is convex that the cooling of the 6th rack emulsion section automatically controls work roll thermal
Degree；And in the outlet section of the 6th rack, the strip after cold continuous rolling is batched.
It is controlled within 8I by the plate shape value of the 0.2mm high grade non-oriented electrical steel after above-mentioned technique cold rolling, it is poor with plate
Within 5.0 μm, without breaking with accident, no strip shape quality defect in production process, product quality is good.
Embodiment 2:
With embodiment 1, difference is, carries out cold continuous rolling, first the 6th rack reduction ratio point using once cold rolling method
Not Wei 37.5%, 34.5%, 33.5%, 32.8%, 30.8%, 27.8%, total reduction 90.9%；And the first rack is arrived
Belt steel temperature is respectively 154 DEG C, 206 DEG C, 235 DEG C, 235 DEG C, 205 DEG C, 105 DEG C at 6th rack outlet；It is cold by above-mentioned technique
The plate shape value of 0.2mm high grade non-oriented electrical steel after rolling controls within 8I, within poor 5.0 μm of plate, in production process
Without disconnected band accident, no strip shape quality defect, product quality is good.
Wherein, distributing order and strip of the first rack to the 6th rack in 18 roller, the six Stands Cold Tandem Mill group
Direction of travel is consistent.
The operation of rolling edge drop control is configured convex by the entrance in 18 roller, six rack cold continuous rolling milling train group
Detector is spent, is exported at it and configures Bian Jiangyi, and configures template instrument in the first rack to the 6th rack outlet, to cooperate the first machine
Frame and the tapered working roll of the second rack band and the control of the 6th rack work roll thermal crown drop band steel edge to realize
Feedforward and feedback control.
Wherein, high grade non-oriented using using novel 18 roller, six tandem rolling to carry out finished product thickness≤0.27mm in the present invention
The production of electrical sheet cold continuous rolling, since eighteen-high mill can realize continuous rolling, need not frequently change compared to the reversible single chassis of 20 rollers
Roller, and eighteen-high mill work roll diameter is 140-170mm, relative to mill work roll diameter 60-85mm, 18 rollers
The big roller diameter of milling train is more excellent to the control of belt plate shape quality in cold-rolled process.It is former for high grade non-oriented electrical steel hot rolling
Material thickness is rolled down to 0.2mm by 2.2mm, and reduction ratio is up to 90.9% rolling procedure, and existing six rollers tandem mill working roll
Diameter 240-320mm, due to the limitation of contact stress between roller and steel edge portion may upper working rolls and lower working rolls be in contact after break the wind of band
Danger, be difficult to it is reliable and stable produce, and the smaller roller diameter of eighteen-high mill can effectively solve the above problem.In addition of the invention
Working roll in the first rack and the second rack of used 18 roller, six Stands Cold Tandem Mill group has antisymmetric single cone
Spend roller shape, while cooperate online reasonable disposition detector and working roll roll thermal crown control, preferably compensate for its relative to
There is strip roll shifting because having with taper working roll to drop the deficiency controlled to band steel edge in UCMW six-high cluster mill.
The above, preferable specific embodiment only of the invention, but protection scope of the present invention is not limited to
This, those skilled in the art are within the scope of method disclosed by the invention, scheme and of the invention according to the method for the present invention
Design is subject to equivalents and is covered by the protection scope of the present invention.
Claims (10)
1. a kind of method of cold continuous rolling production high grade non-oriented electrical steel, which is characterized in that use the cold company of 18 roller, six rack
Milling train group carries out cold rolling to strip, wherein carrying out heating to strip before cold rolling entrance makes its temperature rise to 80-100 DEG C, cold
Rolling entrance and heat to strip again makes its temperature rise to 100-120 DEG C.
2. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 1, which is characterized in that in cold rolling
Before entrance and entrance is to be heated using electromagnetic induction heater to strip.
3. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 1, which is characterized in that described ten
The work roll diameter of eight rollers, six Stands Cold Tandem Mill group is 140-170mm.
4. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 3, which is characterized in that described ten
Every group of two working roll opposing upper and lower in eight rollers, six Stands Cold Tandem Mill group in the first rack and the second rack is to oppose
Single taper roller of title.
5. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 4, which is characterized in that the list
The taper of taper roller is 1/200-1/600.
6. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 5, which is characterized in that described ten
The surface roughness Ra of working roll in eight rollers, six Stands Cold Tandem Mill group in the first rack to the 4th rack is 0.8-1.0 μm,
The surface roughness Ra of the working roll of 5th rack to the 6th rack is 0.4-0.5 μm.
7. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 6, which is characterized in that the work
Make roller using D2 material, hardness HRC60-62.
8. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 1-7, feature exist
In, 18 roller, the six Stands Cold Tandem Mill group uses emulsion to carry out technological lubrication and cooling during the rolling process, so that
Belt steel temperature is 150-250 DEG C at first rack to the 5th rack outlet；6th rack outlet belt steel temperature is 80-150 DEG C.
9. the method for cold continuous rolling production high grade non-oriented electrical steel according to claim 8, which is characterized in that described ten
The first rack reduction ratio is 35-37.5% in eight rollers, six Stands Cold Tandem Mill group, and the second rack reduction ratio is 32-34.5%, the
Three rack reduction ratios be 30-33.5%, the 4th rack reduction ratio be 28-33%, the 5th rack reduction ratio be 27-31%, the 6th
Rack reduction ratio is 16-28%.
10. obtained by a kind of method as any one of the claim 1-9 cold continuous rolling production high grade non-oriented electrical steel
Electrical sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811614347.XA CN109622619B (en) | 2018-12-27 | 2018-12-27 | Method for producing high-grade non-oriented electrical steel by cold continuous rolling and product thereof |
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| CN201811614347.XA CN109622619B (en) | 2018-12-27 | 2018-12-27 | Method for producing high-grade non-oriented electrical steel by cold continuous rolling and product thereof |
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| CN109622619B CN109622619B (en) | 2020-07-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000606A (en) * | 2021-02-23 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113198866A (en) * | 2021-05-07 | 2021-08-03 | 新余钢铁股份有限公司 | Thin-gauge middle-high-grade non-oriented silicon steel acid rolling production process |
| CN116060454A (en) * | 2023-03-23 | 2023-05-05 | 首钢智新迁安电磁材料有限公司 | Cold continuous rolling temperature control method for electrical steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000606A (en) * | 2021-02-23 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113000606B (en) * | 2021-02-23 | 2022-05-24 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113198866A (en) * | 2021-05-07 | 2021-08-03 | 新余钢铁股份有限公司 | Thin-gauge middle-high-grade non-oriented silicon steel acid rolling production process |
| CN113198866B (en) * | 2021-05-07 | 2023-03-17 | 新余钢铁股份有限公司 | Thin-gauge middle-high-grade non-oriented silicon steel acid rolling production process |
| CN116060454A (en) * | 2023-03-23 | 2023-05-05 | 首钢智新迁安电磁材料有限公司 | Cold continuous rolling temperature control method for electrical steel |
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