CN107962075A - The cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge - Google Patents
The cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge Download PDFInfo
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- CN107962075A CN107962075A CN201711205473.5A CN201711205473A CN107962075A CN 107962075 A CN107962075 A CN 107962075A CN 201711205473 A CN201711205473 A CN 201711205473A CN 107962075 A CN107962075 A CN 107962075A
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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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/36—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
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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
- B21B37/48—Tension control; Compression control
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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
- B21B37/56—Elongation control
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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
- B21B37/58—Roll-force control; Roll-gap control
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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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Abstract
The present invention relates to silicon steel cold rolling field, a kind of cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge is disclosed, is included the following steps：Obtain coil of strip and carry out not cutting edge normalizing pickling; then coil of strip is carried out by five passage cold rolling of continuous reversible formula using once cold rolling method; the reduction ratio of each passage, roll-force are controlled, enters side unit tension and goes out side unit tension; and technological lubrication and cooling are carried out using emulsion spray in rolling; the thermal expansion of working roll is controlled to adjust rolled steel plate shape by way of subregion cooling; rear product is rolled in acquirement, then process after conventional progress.The cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning of the present invention not cutting edge solves the problems, such as that the rolling efficiency of high silicon content kind is low and lumber recovery is relatively low.
Description
Technical field
The present invention relates to silicon steel cold rolling field, and in particular to a kind of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge
Cold rolling process.
Background technology
High grade non-oriented silicon steel is mainly used for the iron core and energy-efficient household electrical appliances, electricity of large-scale steamer, hydrogenerator
Electrical automobile, brushless DC and AC induction machines iron core.At present, important research class of the China in various motor field of magnetic material
One of topic is exactly Devoting Major Efforts To Developing high grade non-oriented silicon steel, by researching and developing state-of-the-art technology, improvement component, adjusting process,
Improve magnetism, meet the market demand, reduce import volume.
High grade non-oriented silicon steel is reduced with the raising of silicone content, the magnetic strength of its product, resistivity raising, iron loss, but
When its silicone content >=3.0%, plastic deformation resistance's increase of cold rolling, rolling is difficult.At present, the high grade non-oriented silicon of cold rolling
The large-scale production kind thickness of steel is 0.35~0.65mm, its lumber recovery is always 88%, with the increase of silicone content, behaviour
Make degree-of-difficulty factor increase, broken belt rate is high, and therefore, active demand lifts the lumber recovery index of cold rolling high grade non-oriented silicon steel.
Chinese invention patent application (publication date：March 11, publication number in 2015：CN104399749B one kind) is disclosed
It can prevent that the silicon steel side of Si >=3.5% from splitting and the cold rolling process of brittle failure：First the steel plate of uncoiling is preheated；Sprayed using emulsion
Leaching, and the emulsification flow quantity that preceding 1~4 passage is gone out to side completely closes；Using once cold rolling method cold rolling；Batch, wherein having made
The tension force 60~80% that step section tension force is less than under the coiling speed of setting carries out tension force；Process after routinely carrying out.Should
Although invention improves rolling efficiency and lumber recovery, cold rolling again after being preheated, have impact on equipment failure rate, treats out
The cost of product rate and upper and lower process.
The content of the invention
A kind of deficiency of the purpose of the present invention aiming at above-mentioned technology, there is provided high grade non-oriented silicon steel hot rolling acid-cleaning
The not cold rolling process of cutting edge, solves the problems, such as that the rolling efficiency of high silicon content kind is low relatively low with lumber recovery.
To achieve the above object, a kind of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge designed by the present invention is cold
Rolling method, includes the following steps：
A coil of strip, the cold ingoing ga(u)ge of coil of strip) are obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling
For 2.1~2.4mm, the coil of strip is subjected to not cutting edge normalizing pickling；
B once cold rolling method) being used, by the step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula,
Five passages are rolled using a pair of of working roll, and the working roll is plain-barreled roll, and roller diameter is 300~320mm, the working roll table
Surface roughness is 0.3~0.5 μm, and the first percentage pass reduction is 38%~40%, the 5th percentage pass reduction for 22.2%~
24%, other percentage pass reductions are 26.9%~36%, and the 5th passes power is 980~1100KN, other passes
Power is 990~1250KN, and the second passage, the 3rd passage, four-pass and the 5th passage enter side unit tension scope for 14.5
~33.3kg/mm2, the side unit tension scope that goes out of each passage is 4.9~48.3kg/mm2, when rolling uses emulsion spray
Technological lubrication and cooling are carried out, controls the thermal expansion of working roll to adjust rolled steel plate shape by way of subregion cooling, is produced after rolling
Product thickness is 0.35mm；
C) process after conventional progress.
Preferably, the step B) in concentration of emulsion used be 3%~5%, temperature control be 40~55 DEG C, Mei Gedao
Secondary emulsion range of flow is 2400~4200L/min.
Preferably, when controlling the thermal expansion of working roll to adjust rolled steel plate shape by way of subregion cooling, using four letters
Several target flatness curve F (x)：
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the width of steel coil direction
Abscissa, after Regularization, c1=0, c2=-3, c4=-1.
Preferably, the reduction ratio of the first passage to the 5th passage successively decreases with passage.
Preferably, the step B) in emulsion be unilateral spray.
Preferably, the step B) in rolling speed be 600~800m/min.
Preferably, the step B) rolled using six roll reversing rollers of CVC.
Compared with prior art, the present invention has the following advantages：
1st, coil of strip hot rolling does not carry out cold rolling after cutting edge normalizing pickling directly, considerably reduces equipment failure rate, waits to produce
The cost of rate and upper and lower process；
2nd, by controlling the reduction ratio of the first passage, the crystal grain after normalizing is crushed, crystal grain is grown up when reducing final annealing
Resistance, working roll deflection deformation makes steel band edge compression chord, boundless after cold-rolled to split, and creates conditions for back pass production；
3rd, by the distribution of each percentage pass reduction and roll-force, reduce because of the broken belt risk that silicone content is high and produces；
4th, emulsion spray controls the thermal expansion adjustable plate shape of working roll by way of subregion cooling, makes plate shape straight,
Production for rear process creates conditions；
5th, the present invention improves the production efficiency and lumber recovery of high grade non-oriented silicon steel, and lumber recovery is produced more than 91%
Product strip shape quality is high, and surface quality is good.
Embodiment
The present invention is described in further detail for specific embodiment below.
Embodiment one
Use six roll reversing rollers of CVC production 3.01%Si, plate width sour for the non-oriented high grade silicon steel hot rolling of 1210mm
Not cutting edge volume is washed, is included the following steps：
A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, the cold ingoing ga(u)ge of coil of strip is
2.1mm, not cutting edge normalizing pickling is carried out by coil of strip；
B once cold rolling method) being used, by step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula, and five
Secondary to be rolled using a pair of of working roll, working roll is plain-barreled roll, and roller diameter 300mm, work roll surface roughness is 0.3 μm, control
The pushing rate of each passage, roll-force are made, enters side unit tension and goes out side unit tension, specific data are referring to table 1, during rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, concentration of emulsion used 3%, and temperature control is
40 DEG C, the emulsification flow quantity of each passage controls the thermal expansion of working roll referring to table 1 by way of subregion cooling during spray
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function during adjustable plate shape：
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the width of steel coil direction
Abscissa, after Regularization, c1=0, c2=-3, c4=-1.In the present embodiment, the speed of rolling is 600m/min,
It is 0.35mm to roll rear product thickness；
C) process after conventional progress.
Cutting edge does not roll up five passage cold-rolling process pass schedules to the 1 wide hot rolling acid-cleaning of 1210mm plates of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery compares normal cutting edge volume lifting
More than 3.21%, performance is up to standard, and rolling efficiency is high.
Embodiment two
Use six roll reversing rollers of CVC production 3.02%Si, plate width sour for the non-oriented high grade silicon steel hot rolling of 1170mm
Not cutting edge volume is washed, is included the following steps：
A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, the cold ingoing ga(u)ge of coil of strip is
2.2mm, not cutting edge normalizing pickling is carried out by coil of strip；
B once cold rolling method) being used, by step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula, and five
Secondary to be rolled using a pair of of working roll, working roll is plain-barreled roll, and roller diameter 320mm, work roll surface roughness is 0.5 μm, control
The pushing rate of each passage, roll-force are made, enters side unit tension and goes out side unit tension, specific data are referring to table 2, during rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, concentration of emulsion used 5%, and temperature control is
55 DEG C, the emulsification flow quantity of each passage controls the thermal expansion of working roll referring to table 2 by way of subregion cooling during spray
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function during adjustable plate shape：
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the width of steel coil direction
Abscissa, after Regularization, c1=0, c2=-3, c4=-1.In the present embodiment, the speed of rolling is 800m/min,
It is 0.35mm to roll rear product thickness；
C) process after conventional progress.
Cutting edge does not roll up five passage cold-rolling process pass schedules to the 2 wide hot rolling acid-cleaning of 1170mm plates of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery compares normal cutting edge volume lifting
More than 3.18%, performance is up to standard, and rolling efficiency is high.
Embodiment three
Use six roll reversing rollers of CVC production 3.01%Si, plate width sour for the non-oriented high grade silicon steel hot rolling of 1150mm
Not cutting edge volume is washed, is included the following steps：
A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, the cold ingoing ga(u)ge of coil of strip is
2.3mm, not cutting edge normalizing pickling is carried out by coil of strip；
B once cold rolling method) being used, by step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula, and five
Secondary to be rolled using a pair of of working roll, working roll is plain-barreled roll, and roller diameter 310mm, work roll surface roughness is 0.4 μm, control
The pushing rate of each passage, roll-force are made, enters side unit tension and goes out side unit tension, specific data are referring to table 3, during rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, concentration of emulsion used 4%, and temperature control is
45 DEG C, the emulsification flow quantity of each passage controls the thermal expansion of working roll referring to table 3 by way of subregion cooling during spray
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function during adjustable plate shape：
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the width of steel coil direction
Abscissa, after Regularization, c1=0, c2=-3, c4=-1.In the present embodiment, the speed of rolling is 680m/min,
It is 0.35mm to roll rear product thickness；
C) process after conventional progress.
Cutting edge does not roll up five passage cold-rolling process pass schedules to the 3 wide hot rolling acid-cleaning of 1150mm plates of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery compares normal cutting edge volume lifting
More than 3.1%, performance is up to standard, and rolling efficiency is high.
Example IV
Use six roll reversing rollers of CVC production 3.05%Si, plate width sour for the non-oriented high grade silicon steel hot rolling of 1105mm
Not cutting edge volume is washed, is included the following steps：
A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, the cold ingoing ga(u)ge of coil of strip is
2.4mm, not cutting edge normalizing pickling is carried out by coil of strip；
B once cold rolling method) being used, by step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula, and five
Secondary to be rolled using a pair of of working roll, working roll is plain-barreled roll, and roller diameter 315mm, work roll surface roughness is 0.45 μm,
The pushing rate of each passage, roll-force are controlled, enters side unit tension and goes out side unit tension, specific data are referring to table 4, rolling
Shi Caiyong emulsion sprays carry out technological lubrication and cooling, and emulsion is unilateral spray, concentration of emulsion used 4.2%, temperature control
It is made as 50 DEG C, the emulsification flow quantity of each passage controls the heat of working roll referring to table 4 by way of subregion cooling during spray
Expansion adjusts rolled steel plate shape, using the target flatness curve F (x) of biquadratic function during adjustable plate shape：
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the width of steel coil direction
Abscissa, after Regularization, c1=0, c2=-3, c4=-1.In the present embodiment, the speed of rolling is 750m/min,
It is 0.35mm to roll rear product thickness；
C) process after conventional progress.
Cutting edge does not roll up five passage cold-rolling process pass schedules to the 4 wide hot rolling acid-cleaning of 1105mm plates of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery compares normal cutting edge volume lifting
More than 3.05%, performance is up to standard, and rolling efficiency is high.
The cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning of the present invention not cutting edge, considerably reduces equipment fault
Rate, the cost for treating yield rate and upper and lower process；And it is cold-rolled after it is boundless split, for back pass production create conditions；Additionally by
The distribution of each percentage pass reduction and roll-force, reduces because of the broken belt risk that silicone content is high and produces；Production efficiency and become a useful person
Rate is high, and plate shape is straight, and surface quality is good, creates conditions for the production of rear process.
Claims (7)
- A kind of 1. cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge, it is characterised in that：Include the following steps：A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, the cold ingoing ga(u)ge of coil of strip is 2.1 ~2.4mm, not cutting edge normalizing pickling is carried out by the coil of strip；B once cold rolling method) being used, by the step A) coil of strip that obtains carries out five passage cold rolling of continuous reversible formula, and five Secondary to be rolled using a pair of of working roll, the working roll is plain-barreled roll, and roller diameter is 300~320mm, and the work roll surface is coarse Spend for 0.3~0.5 μm, the first percentage pass reduction is 38.1%~39.58%, the 5th percentage pass reduction for 22.22%~ 23.91%, other percentage pass reductions are 26.98%~35.97%, and the 5th passes power is 9852~10900KN, Qi Tadao Secondary roll-force is 9987~12500KN, and the second passage, the 3rd passage, four-pass and the 5th passage enter side unit tension model Enclose for 10.27~33.22kg/mm2, the side unit tension scope that goes out of each passage is 4.92~48.26kg/mm2, when rolling adopts Technological lubrication and cooling are carried out with emulsion spray, controls the thermal expansion of working roll to adjust rolled steel plate by way of subregion cooling Shape, it is 0.35mm to roll rear product thickness；C) process after conventional progress.
- 2. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：Institute State step B) in concentration of emulsion used be 3%~5%, temperature control is 40~55 DEG C, and each passage emulsion range of flow is 2400~4200L/min.
- 3. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：It is logical Cross subregion cooling mode control working roll thermal expansion adjust rolled steel plate shape when, using the target flatness curve F of biquadratic function (x)：F (x)=c1x+c2x2+c4x4In formula, c1For four term coefficients, c2For secondary term coefficient, c4For four term coefficients, x is the horizontal stroke in the width of steel coil direction Coordinate, after Regularization, c1=0, c2=-3, c4=-1.
- 4. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：The The reduction ratio of a time to the 5th passage successively decreases with passage.
- 5. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：Institute State step B) in emulsion be unilateral spray.
- 6. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：Institute State step B) in rolling speed be 600~800m/min.
- 7. the cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge according to claim 1, it is characterised in that：Institute State step B) rolled using six roll reversing rollers of CVC.
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| CN108655173A (en) * | 2018-05-11 | 2018-10-16 | 鞍钢股份有限公司 | A kind of non-oriented high grade silicon steel milling method |
| CN108817081A (en) * | 2018-06-13 | 2018-11-16 | 武汉钢铁有限公司 | The milling method of silicon steel |
| CN109530437A (en) * | 2018-12-11 | 2019-03-29 | 佛山市诚德新材料有限公司 | A kind of cold rolling process and stainless steel band of stainless steel band |
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