CN1743469A - Method for manufacturing non-oriented silicon steel sheet - Google Patents
Method for manufacturing non-oriented silicon steel sheet Download PDFInfo
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- CN1743469A CN1743469A CN 200510047264 CN200510047264A CN1743469A CN 1743469 A CN1743469 A CN 1743469A CN 200510047264 CN200510047264 CN 200510047264 CN 200510047264 A CN200510047264 A CN 200510047264A CN 1743469 A CN1743469 A CN 1743469A
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Abstract
This invention puts forward a method for manufacturing orientation-free silicon-steel sheets characterizing in applying stable and constant magnetic field in the 350-800degC region of the heating or cooling stage in the product annealing technology to get high performance silicon steel sheets with optimized recrystallization structure and the magnetic field strength is 0.1~12T. The weigh percentage of its composition is computed as follows: Si 2.0~3.5, Al 0.1~2.0, C is not greater than 0.01, Mn 0.2~0.35, P is not greater than 0.02, S is less than or equal to 0.003, N2 is less than or equal to 0.0025, O2 is not greater than 0.003, the rest is iron or impurities.
Description
Technical field
The invention belongs to ferrous metallurgy and processing technique field, promptly relate to a kind of method of making high-performance cold rolled non-oriented silicon steel sheet by reinforcement recrystallization texture control effect.
Background technology
Non-oriented silicon steel sheet is a soft magnetic materials commonly used of making generator and motor iron-core.
In recent years, the low cost of electrical equipment, high-level efficiency, miniaturization development trend require non-oriented silicon steel sheet to have performance characteristics such as low iron loss, high saturated magnetic induction, high magnetic permeability.The manufacturing process flow of cold rolling non-orientation silicon steel sheet generally include smelting, continuous casting, hot rolling, cold rolling, anneal, be coated with master operations such as insulation layer.Obtain above-mentioned premium properties and must take following measure: (1) reduces foreign matter content in the silicon steel, improves purity; (2) content that improves Si+Al in the silicon steel to be increasing resistivity, but too highly can reduce saturation induction density and cause processibility to worsen; (3) improve deformation or annealing process, the recrystallization texture behind the optimization finished products promptly increases { 100} favorable texture, minimizing { the unfavorable texture of 111} as far as possible.Wherein to improve the space of comprehensive magnetic property very big by optimizing recrystallization texture, but the stable difficulty that obtains favourable recrystallization texture is also very big, and this has become the key problem of producing the high performance silicon steel disc.
The application of thermomagnetic treatment in regulation and control recrystallized structure structure comes into one's own day by day.Kawasaki Steel Corp opens the manufacture method that discloses a kind of non-oriented magnetic steel sheet among the flat 5-33062 the spy, roll to applying magnetic field (20～20000 Gauss) on answer and recrystallize initial stage edge at finished products, the minimizing of 111} texture,＜001〉texture increase, iron loss significantly reduces.The manufacture method that discloses the non-oriented magnetic steel sheet of low iron loss, high magnetic strength among the 2000-17334 is again opened the spy in the Kawasaki Steel, its when finished products heats in 500 ℃ with the upper edge roll to apply exchange or direct magnetic field (＞1.5T), magnetic strength improves, iron loss reduces.
Summary of the invention
The objective of the invention is in annealing operation, to introduce magnetic field, seek a kind of method for preparing high-performance cold rolled non-oriented silicon steel sheet by effective control recrystallization texture.
The present invention proposes a kind of method of making high-performance cold rolled non-oriented silicon steel sheet with magnetic-field annealing process optimization recrystallization texture, comprise smelting, continuous casting, hot rolling, cold rolling, anneal, be coated with operation such as insulation layer, it is characterized in that in the finished product annealing process process temperature in the time of 350～800 ℃ along rolling to applying steady magnetic field.
The untouchable outfield that magnetic field is a kind of energy density height, can accurately control.Magnetic-field annealing can influence recrystallization process by magnetocrystalline anisotropy energy and magnetic order: on the one hand, with the orientation relationship difference of crystal grain with respect to magnetic field, magnetocrystalline anisotropy energy is also different, and wherein the crystal grain that magnetocrystalline anisotropy energy is low will be subjected to the promotion in magnetic field.In Fe base alloy,＜001〉be easy magnetization axis, magnetocrystalline anisotropy energy is minimum, and applying magnetic field can be＜001〉crystal orientation be parallel to field direction crystal grain forming core and grow up additional drives power be provided.On the other hand, magnetic order reduces atomic diffusion, thereby influences the formation and development of different recrystallization textures.Two kinds of mechanism of action of magnetocrystalline anisotropy energy and magnetic order all suppress { 111} texture and help { 100} texture evolution.
In order to make the cold rolling non-orientation silicon steel sheet obtain favourable recrystallization texture, the steady magnetic field that the present invention applied, its magnetic induction density are 0.1～12T.
On basis to the mechanism of magnetic-field annealing and parameter influence knowledge of regularity thereof, magnetic-field annealing is introduced in the manufacturing processed of non-oriented silicon steel sheet, roll to applying direct magnetic field on " temperature-fall period ", " temperature rise period+temperature-fall period " edge in the finished products operation, proposes to strengthen the method that recrystallization texture control effect prepares high-performance cold rolled non-oriented silicon steel sheet by magnetic-field annealing.
The present invention applies steady magnetic field in the finished products operation, can apply in temperature-fall period (800 → 350 ℃ of intervals), also can heat up in (350 → 800 ℃ of intervals) and (800 → 350 ℃ of intervals) stage of lowering the temperature applies for twice, and its effect is all very remarkable.
The silicon steel composition that method of the present invention was suitable for (percentage ratio calculating by weight) is: Si2.0-3.5, Al0.1-2.0, C≤0.01, Mn 0.2～0.35, P≤0.02, S≤0.003, N
2≤ 0.0025, O
2≤ 0.003, surplus is Fe and unavoidable impurities.Composition limits and the reasons are as follows:
Below the C:0.01%, better below 0.005%, thus can not decarburization prevent to form internal oxidation layer and interior nitride layer during annealing, can avoid separating out simultaneously tiny second mutually and magnetic aging occurs; Si:2.0～3.5%, 2.0% content can effectively improve siliconized plate resistivity to reduce eddy-current loss, surpasses 3.5% cold-workability and worsens; Al:0.1～2.0%, performance improve resistivity needs content 0.1% or more with the effect that reduces eddy-current loss, surpasses 2.0% content, and the siliconized plate cold-workability degenerates and the magnetic strength reduction; Mn:0.2～0.35%, 0.2% content can play the effect that improves hot rolling plasticity and hot-rolled sheet tissue, but improves the hardness of steel, cold-workability is degenerated, so be limited in 0.35%; Below the P:0.02%, act on similarly, surpass 0.02% and may cause embrittlement to Si; S, N, O are that magnetic worsens element, should reduce its content as far as possible.
Method of the present invention does not have special restriction to the technical process and the processing parameter of cold rolling non-orientation silicon steel sheet, i.e. smelting, continuous casting, hot rolling, cold rolling, be coated with operations such as insulation layer and can adopt common technology.
The prepared siliconized plate congruent, same specification of cold rolling non-orientation silicon steel sheet that method of the present invention is prepared and common process compares, and { 100} texture significantly increases, and { 111} texture significantly reduces, and recrystallization texture is effectively optimized.
Description of drawings
Fig. 1 is finished product non-oriented silicon steel sheet { the orientation density profile of 100} texture.Among the figure: f (g) is the grain orientation density value, Ψ be three Eulerian angles in the orientation distribution function (Orientation Density Function) (Ψ, θ, one of ), fixedly θ=0 °, =0 °, { each texture component in the 100} texture ° can be represented in Ψ=0～45; ■ is not for applying the conventional annealing technology in magnetic field, ● for heating up and temperature-fall period all applies the technology in 0.1T magnetic field, ▲ for intensification and temperature-fall period all apply the technology in 6T magnetic field, is the technology that temperature-fall period applies 12T magnetic field.
Fig. 2 be the finished product non-oriented silicon steel sheet orientation density of 111} texture (with point of maximum intensity 111}＜112〉component representative) with magnetic induction density (T) graph of a relation.
Embodiment
Below in conjunction with specific embodiment method of the present invention is done further to replenish and explanation.
Embodiment 1
Chemical ingredients (wt%) is C 0.0026, Si 2.42, Al 0.33, Mn 0.35, P 0.014, S0.0023, N
20.0015, O
20.0023 and the continuously cast bloom of Fe surplus, after 1130 ℃ of soaking, it is thick to be hot-rolled down to 2.4mm, 848 ℃ of finishing temperatures, 610 ℃ of coiling temperatures.Behind the pickling descaling, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm.
After cold rolling, siliconized plate is carried out 850 ℃, 30 minutes finished products, at temperature rise period (350 → 800 ℃ of intervals) and temperature-fall period (800 → 350 ℃ of intervals), along rolling to applying the 0.1T steady magnetic field.
Embodiment 2
Chemical ingredients (wt%) is C 0.0026, Si 3.5, Al 0.10, Mn 0.20, P 0.016, S0.0025, N
20.0015, O
20.002 and the continuously cast bloom of Fe surplus, after 1140 ℃ of soaking, it is thick to be hot-rolled down to 2.4mm, 850 ℃ of finishing temperatures, 615 ℃ of coiling temperatures.Behind the pickling descaling, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm.
After cold rolling, silicon steel sheet is carried out 850 ℃, 30 minutes finished products, at temperature rise period (350 → 800 ℃ of intervals) and temperature-fall period (800 → 350 ℃ of intervals), along rolling to applying the 6T steady magnetic field.
Embodiment 3
Chemical ingredients (wt%) is C 0.0026, Si 2.0, Al 2.0, Mn 0.33, P 0.013, S 0.0023, N
20.0014, O
20.0025 and the continuously cast bloom of Fe surplus, after 1145 ℃ of soaking, it is thick to be hot-rolled down to 2.4mm, 855 ℃ of finishing temperatures, 608 ℃ of coiling temperatures.Behind the pickling descaling, adopt the once cold rolling method to divide five passages to be cold-rolled to finished product thickness 0.5mm.
After cold rolling, silicon steel sheet is carried out 850 ℃, 30 minutes finished products, in temperature-fall period (800 → 350 ℃ of intervals), along rolling to applying the 12T steady magnetic field.
With the finished product non-oriented silicon steel sheet of technology of the present invention and common process preparation, its { 100} and { the orientation density of 111} texture is shown in Fig. 1 and Fig. 2 (among the figure numerical value for the mean value in 1/4 layer and middle layer) up and down respectively.As seen, in the finished products operation, introduce magnetic field in a suitable manner, can make favorable texture in the non-oriented silicon steel sheet 100} significantly increases, and unfavorable texture { 111} obviously reduces, and this has embodied value of the present invention well.
Claims (5)
1, a kind of manufacture method of non-oriented silicon steel sheet, comprise smelting, continuous casting, hot rolling, cold rolling, anneal, be coated with operations such as insulation layer, it is characterized in that in the finished products operation that temperature is 350～800 ℃ and rolls to applying steady magnetic field along sheet material when interval, its recrystal grain texture is effectively optimized.
2, by the manufacture method of the described non-oriented silicon steel sheet of claim 1, it is characterized in that its magnetic induction density of said steady magnetic field is 0.1～12 tesla.
3, by the manufacture method of the described non-oriented silicon steel sheet of claim 1, it is characterized in that applying in the said finished products operation steady magnetic field is to carry out in 350 → 800 ℃ of intervals of temperature rise period.
4,, it is characterized in that applying in the said finished products operation steady magnetic field and be in 350 → 800 ℃ of intervals of temperature rise period and 800 → 350 ℃ of intervals of temperature-fall period and carry out by the manufacture method of the described non-oriented silicon steel sheet of claim 1.
5, a kind of silicon steel composition that is suitable for the manufacture method of the described non-oriented silicon steel sheet of claim 1 comprises Si, Al, Mn, C, P and Fe, it is characterized in that percentage ratio is calculated as Si2.0-3.5 by weight, Al0.1-2.0, Mn0.2-0.35, C≤0.01, P≤0.02, the Fe surplus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100472643A CN100436605C (en) | 2005-09-23 | 2005-09-23 | Method for manufacturing non-oriented silicon steel sheet |
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|---|---|---|---|
| CNB2005100472643A CN100436605C (en) | 2005-09-23 | 2005-09-23 | Method for manufacturing non-oriented silicon steel sheet |
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| CN1743469A true CN1743469A (en) | 2006-03-08 |
| CN100436605C CN100436605C (en) | 2008-11-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492786B (en) * | 2008-01-23 | 2010-08-25 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
| CN102482742A (en) * | 2009-09-03 | 2012-05-30 | 新日本制铁株式会社 | Non-oriented electromagnetic steel sheet |
| CN102676748A (en) * | 2012-05-29 | 2012-09-19 | 武汉理工大学 | Metal material softening annealing treatment method |
| CN102950464A (en) * | 2011-08-17 | 2013-03-06 | 五冶集团上海有限公司 | Method for mounting continuous production line of non-oriented silicon steel |
| CN104299745A (en) * | 2014-09-17 | 2015-01-21 | 明光市锐创电气有限公司 | Silicon steel sheet used for transformer |
| CN109604546A (en) * | 2019-01-21 | 2019-04-12 | 河南工学院 | A kind of high-intensitive, strong cubic texture nickel tungsten base band preparation method |
| CN113005264A (en) * | 2021-02-20 | 2021-06-22 | 包头市威丰稀土电磁材料股份有限公司 | Oriented silicon steel magnetic field annealing process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW198734B (en) * | 1990-12-10 | 1993-01-21 | Kawasaki Steel Co |
-
2005
- 2005-09-23 CN CNB2005100472643A patent/CN100436605C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492786B (en) * | 2008-01-23 | 2010-08-25 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
| CN102482742A (en) * | 2009-09-03 | 2012-05-30 | 新日本制铁株式会社 | Non-oriented electromagnetic steel sheet |
| CN102950464A (en) * | 2011-08-17 | 2013-03-06 | 五冶集团上海有限公司 | Method for mounting continuous production line of non-oriented silicon steel |
| CN102950464B (en) * | 2011-08-17 | 2015-09-30 | 五冶集团上海有限公司 | Non-orientation silicon steel tinuous production installation method |
| CN102676748A (en) * | 2012-05-29 | 2012-09-19 | 武汉理工大学 | Metal material softening annealing treatment method |
| CN104299745A (en) * | 2014-09-17 | 2015-01-21 | 明光市锐创电气有限公司 | Silicon steel sheet used for transformer |
| CN109604546A (en) * | 2019-01-21 | 2019-04-12 | 河南工学院 | A kind of high-intensitive, strong cubic texture nickel tungsten base band preparation method |
| CN113005264A (en) * | 2021-02-20 | 2021-06-22 | 包头市威丰稀土电磁材料股份有限公司 | Oriented silicon steel magnetic field annealing process |
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| Publication number | Publication date |
|---|---|
| CN100436605C (en) | 2008-11-26 |
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Granted publication date: 20081126 Termination date: 20110923 |