CN107962075B - 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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- CN107962075B CN107962075B CN201711205473.5A CN201711205473A CN107962075B CN 107962075 B CN107962075 B CN 107962075B CN 201711205473 A CN201711205473 A CN 201711205473A CN 107962075 B CN107962075 B CN 107962075B
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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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The present invention relates to silicon steel cold rolling fields, disclose a kind of cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge, include the following steps: to obtain coil of strip and carries 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, control the reduction ratio of each passage, roll-force, enter side unit tension and out side unit tension, and technological lubrication and cooling are carried out using emulsion spray in rolling, the thermal expansion that working roll is controlled in such a way that subregion is cooling adjusts rolled steel plate shape, 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 fields, and in particular to a kind of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge
Cold rolling process.
Background technique
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 machine iron core.Currently, important research class of the China in various motor field of magnetic material
Topic one of be exactly Devoting Major Efforts To Developing high grade non-oriented silicon steel, by research and develop state-of-the-art technology, improvement ingredient, adjusting process,
It improves magnetism, meet the market demand, reduce import volume.
High grade non-oriented silicon steel is with the raising of silicone content, and the magnetic strength of product, resistivity improve, iron loss reduces, but
When its silicone content >=3.0%, the plastic deformation resistance of cold rolling increases, and rolling is difficult.Currently, the high grade non-oriented silicon of cold rolling
The large-scale production kind of steel is with a thickness of 0.35~0.65mm, and lumber recovery is always 88%, with the increase of silicon content, behaviour
Make degree-of-difficulty factor increase, broken belt rate is high, and therefore, urgent need promotes 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) discloses one kind
It can prevent the silicon steel of Si >=3.5% side from splitting and the cold rolling process of brittle failure: first the steel plate of uncoiling being preheated；It is sprayed using emulsion
Leaching, and the emulsification flow quantity that preceding 1~4 passage goes out side is completely closed；Using once cold rolling method cold rolling；It batches, wherein having made
Step section tension is less than the tension 60~80% under the coiling speed of setting and carries out tension force；Process after routinely carrying out.It should
Although invention improves rolling efficiency and lumber recovery, cold rolling again after being preheated, equipment failure rate is affected, wait go out
The cost of product rate and upper and lower process.
Summary of the invention
The purpose of the present invention is to the deficiencies of above-mentioned technology, provide a kind of 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 and lumber recovery is relatively low.
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) is used, the coil of strip that the step A) is obtained carries out five passage cold rolling of continuous reversible formula,
Five passages are all made of a pair of of working roll rolling, and the working roll is plain-barreled roll, and roller diameter is 300~320mm, the working roll table
Surface roughness be 0.3~0.5 μm, the first percentage pass reduction be 38%~40%, the 5th percentage pass reduction be 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, third passage, the side unit tension range that enters of four-pass and the 5th passage are 14.5
~33.3kg/mm2, the side unit tension range that goes out of each passage is 4.9~48.3kg/mm2, emulsion spray is used when rolling
Technological lubrication and cooling are carried out, the thermal expansion that working roll is controlled in such a way that subregion is cooling adjusts rolled steel plate shape, produces after rolling
Product are with a thickness of 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 adjusting rolled steel plate shape of working roll in such a way that subregion is cooling, using four letters
Several target flatness curve F (x):
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-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 roll speed be 600~800m/min.
Preferably, the step B) it is rolled using six roll reversing roller of CVC.
Compared with prior art, the present invention having the advantage that
1, coil of strip hot rolling does not carry out cold rolling directly after cutting edge normalizing pickling, considerably reduces equipment failure rate, wait produce
The cost of rate and upper and lower process；
2, by controlling the reduction ratio of the first passage, the crystal grain after being crushed normalizing, 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；
3, by the distribution of each percentage pass reduction and roll-force, reduce the disconnected band risk generated by silicone content height；
4, emulsion spray controls the thermal expansion adjustable plate shape of working roll in such a way that subregion is cooling, keeps plate shape straight,
Production for rear process creates conditions；
5, the present invention improves the production efficiency and lumber recovery of high grade non-oriented silicon steel, and lumber recovery is more than 91%, and produces
Product strip shape quality is high, and surface quality is good.
Specific embodiment
The present invention is described in further detail for specific embodiment below.
Embodiment one
Use six roll reversing roller of CVC production 3.01%Si, plate width for the non-oriented high grade silicon steel hot rolling acid of 1210mm
Not cutting edge volume is washed, is included the following steps:
A) using conventional non-oriented high grade technique smeltings, continuous casting, hot rolling acquirement coil of strip, before coil of strip cold rolling with a thickness of
Coil of strip is carried out not cutting edge normalizing pickling by 2.1mm；
B once cold rolling method) is used, the coil of strip progress five passage cold rolling of continuous reversible formula that step A) is obtained, five
Secondary to be all made of a pair of of working roll rolling, working roll is plain-barreled roll, and roller diameter 300mm, work roll surface roughness is 0.3 μm, control
It makes the pushing rate of each passage, roll-force, enter side unit tension and out side unit tension, specific data are referring to table 1, when rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, and concentration of emulsion used 3%, temperature, which controls, is
40 DEG C, when spray each passage emulsification flow quantity referring to table 1, the thermal expansion of working roll is controlled in such a way that subregion is cooling
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function when adjustable plate shape:
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-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,
Rolling rear product thickness is 0.35mm；
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 plate of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery is compared normal cutting edge volume and promoted
3.21% or more, performance is up to standard, and rolling efficiency is high.
Embodiment two
Use six roll reversing roller of CVC production 3.02%Si, plate width for the non-oriented high grade silicon steel hot rolling acid of 1170mm
Not cutting edge volume is washed, is included the following steps:
A) using conventional non-oriented high grade technique smeltings, continuous casting, hot rolling acquirement coil of strip, before coil of strip cold rolling with a thickness of
Coil of strip is carried out not cutting edge normalizing pickling by 2.2mm；
B once cold rolling method) is used, the coil of strip progress five passage cold rolling of continuous reversible formula that step A) is obtained, five
Secondary to be all made of a pair of of working roll rolling, working roll is plain-barreled roll, and roller diameter 320mm, work roll surface roughness is 0.5 μm, control
It makes the pushing rate of each passage, roll-force, enter side unit tension and out side unit tension, specific data are referring to table 2, when rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, and concentration of emulsion used 5%, temperature, which controls, is
55 DEG C, when spray each passage emulsification flow quantity referring to table 2, the thermal expansion of working roll is controlled in such a way that subregion is cooling
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function when adjustable plate shape:
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-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,
Rolling rear product thickness is 0.35mm；
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 plate of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery is compared normal cutting edge volume and promoted
3.18% or more, performance is up to standard, and rolling efficiency is high.
Embodiment three
Use six roll reversing roller of CVC production 3.01%Si, plate width for the non-oriented high grade silicon steel hot rolling acid of 1150mm
Not cutting edge volume is washed, is included the following steps:
A) using conventional non-oriented high grade technique smeltings, continuous casting, hot rolling acquirement coil of strip, before coil of strip cold rolling with a thickness of
Coil of strip is carried out not cutting edge normalizing pickling by 2.3mm；
B once cold rolling method) is used, the coil of strip progress five passage cold rolling of continuous reversible formula that step A) is obtained, five
Secondary to be all made of a pair of of working roll rolling, working roll is plain-barreled roll, and roller diameter 310mm, work roll surface roughness is 0.4 μm, control
It makes the pushing rate of each passage, roll-force, enter side unit tension and out side unit tension, specific data are referring to table 3, when rolling
Technological lubrication and cooling are carried out using emulsion spray, emulsion is unilateral spray, and concentration of emulsion used 4%, temperature, which controls, is
45 DEG C, when spray each passage emulsification flow quantity referring to table 3, the thermal expansion of working roll is controlled in such a way that subregion is cooling
Rolled steel plate shape is adjusted, using the target flatness curve F (x) of biquadratic function when adjustable plate shape:
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-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,
Rolling rear product thickness is 0.35mm；
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 plate of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery is compared normal cutting edge volume and promoted
3.1% or more, performance is up to standard, and rolling efficiency is high.
Example IV
Use six roll reversing roller of CVC production 3.05%Si, plate width for the non-oriented high grade silicon steel hot rolling acid of 1105mm
Not cutting edge volume is washed, is included the following steps:
A) using conventional non-oriented high grade technique smeltings, continuous casting, hot rolling acquirement coil of strip, before coil of strip cold rolling with a thickness of
Coil of strip is carried out not cutting edge normalizing pickling by 2.4mm；
B once cold rolling method) is used, the coil of strip progress five passage cold rolling of continuous reversible formula that step A) is obtained, five
Secondary to be all made of a pair of of working roll rolling, working roll is plain-barreled roll, and roller diameter 315mm, work roll surface roughness is 0.45 μm,
It controls the pushing rate of each passage, roll-force, enter side unit tension and out side unit tension, specific data are referring to table 4, rolling
Shi Caiyong emulsion spray carries out technological lubrication and cooling, and emulsion is unilateral spray, concentration of emulsion used 4.2%, temperature control
Be made as 50 DEG C, when spray each passage emulsification flow quantity referring to table 4, the heat of working roll is controlled in such a way that subregion is cooling
Expansion adjusts rolled steel plate shape, using the target flatness curve F (x) of biquadratic function when adjustable plate shape:
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-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,
Rolling rear product thickness is 0.35mm；
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 plate of table
The present embodiment final products material object quality of edges is all right, boundless to split, and lumber recovery is compared normal cutting edge volume and promoted
3.05% or more, 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, to the cost of 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 the disconnected band risk generated by silicone content height；It production efficiency and becomes 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)
1. a kind of cold rolling process of high grade non-oriented silicon steel hot rolling acid-cleaning not cutting edge, characterized by the following steps:
A coil of strip) is obtained using conventional non-oriented high grade technique smelting, continuous casting, hot rolling, with a thickness of 2.1 before the coil of strip cold rolling
The coil of strip is carried out not cutting edge normalizing pickling by~2.4mm；
B once cold rolling method) is used, the coil of strip progress five passage cold rolling of continuous reversible formula that the step A) is obtained, five
Secondary to be all made of a pair of of working roll rolling, the working roll is plain-barreled roll, and roller diameter is 300~320mm, and the work roll surface is coarse
Degree be 0.3~0.5 μm, the first percentage pass reduction be 38.1%~39.58%, the 5th percentage pass reduction be 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, third passage, four-pass and the 5th passage enter side unit tension model
It encloses for 10.27~33.22kg/mm2, the side unit tension range 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, the thermal expansion that working roll is controlled in such a way that subregion is cooling adjusts rolled steel plate
Shape, rolling rear product thickness is 0.35mm；
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: logical
When crossing the cooling mode of subregion and controlling the thermal expansion of working roll and adjust rolled steel plate shape, using the target flatness curve F of biquadratic function
(x):
F (x)=c1x+c2x2+c4x4
In formula, c1For four term coefficients, c2For two-term coefficient, c4For four term coefficients, x is the cross 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 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 roll 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) it is rolled using six roll reversing roller of CVC.
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| CN115569986B (en) * | 2022-09-26 | 2023-05-05 | 山东新美达科技材料有限公司 | Rolling method for rolling 0.115 x 750mm narrow-band cold-rolled low-carbon steel coil by wide rolling mill |
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| CN103008360A (en) * | 2012-10-30 | 2013-04-03 | 中冶南方（武汉）信息技术工程有限公司 | Method for determining temperature field and thermal expansion of cold rolling mill working roll |
| CN104726668A (en) * | 2013-12-23 | 2015-06-24 | 鞍钢股份有限公司 | Method for effectively producing high magnetic induction grain-oriented silicon steel |
| CN104874614A (en) * | 2014-02-28 | 2015-09-02 | 上海梅山钢铁股份有限公司 | Emulsion fine cooling system control method and control device |
| CN105689405A (en) * | 2016-01-28 | 2016-06-22 | 燕山大学 | Intelligent setting method for on-line target strip shape of cold rolling strip |
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