CN104630619A - High silicon steel for thin slab casting and rolling production and preparation method thereof - Google Patents
High silicon steel for thin slab casting and rolling production and preparation method thereof Download PDFInfo
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- CN104630619A CN104630619A CN201510066055.7A CN201510066055A CN104630619A CN 104630619 A CN104630619 A CN 104630619A CN 201510066055 A CN201510066055 A CN 201510066055A CN 104630619 A CN104630619 A CN 104630619A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1227—Warm rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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Abstract
The invention discloses high silicon steel for thin slab casting and rolling production. The high silicon steel comprises the following components in percentage by weight: less than or equal to 0.003 percent of C, 4.5-7.0 percent of Si, 0.25-1.0 percent of Mn, less than or equal to 0.008 percent of Al, less than or equal to 0.0050 percent of S, less than or equal to 0.0030 percent of N and less than or equal to 20PPm of [O]. The preparation method comprises the following steps: smelting; casting; heating the cast slab; rolling; coiling; insulating in a bell-type furnace; performing warm-rolling, namely performing cold rolling at a temperature of 150 to 500 DEG C; and annealing at a high temperature. On the basis of the conventional thin slab casting and rolling equipment, a proper casting process is adopted, the columnar crystal ratio is improved, and the columnar crystal size is reduced; and the hot-rolling process is controlled, a fine fiber structure is obtained, and the warm-rolling property is guaranteed. The high silicon steel with good processability and magnetic performance can be produced.
Description
Technical field
The present invention relates to a kind of silicon steel and production method, belong to high silicon steel and the preparation method of the production of a kind of CSP particularly.
Background technology
Although the frequency of utilization improving iron core can make motor working efficiency be improved significantly, and can reduce the dimension and weight of iron core significantly.But the raising of frequency can bring iron loss to increase with exponential form, and energy loses in a large number thereupon, also can cause that magnetostriction strengthens, noise sharply lift-rising thus make environment be subject to serious sound pollution.It constrains high frequency and the miniaturization of motor.
Along with the increase of silicone content, resistivity increases, and iron loss declines gradually, and when silicone content reaches 6 ~ 8%SiWt, iron loss is minimum.Along with the increase of silicone content, permeability increases, and occurs maximum value when 6.5%SiWt.The magnetic hysteresis of high silicon steel is stretched almost nil.High silicon steel has quite superior magnetic performance when (higher than 1000HZ) magnetizes in high-frequency range compared with traditional silicon steel disc, and namely iron loss is low by 40 ~ 70%, and magnetostriction is almost nil, high several times ~ tens times of permeability,
But, along with the increase of silicone content, processing under low temperature is become more difficult, is namely difficult to be prepared into product.In order to improve its processed-type, mainly contain following several preparation method at present:
1, deposition-diffusion method, namely passes through the various sedimentations such as CVD, PCVD, electrophoretic deposition at substrate enrichment Si
4+, then by High temperature diffusion, form the high silicon steel that surface silicon content is high.But, there is internal component and uneven microstructure in its product prepared, has impact to the homogeneity of magnetic property.In addition, this sedimentation requires high to processing unit, and the environmental pollutions such as deposition medium SiCl4 are also larger.
2, powder metallurgic method, namely by compression moulding after annealing, siliconising annealing after Fe powder and the mixing of Si powder, this kind of method is difficult to control with being mingled with to pore, and uniform in material is also difficult to ensure.
3, quick quenching technique, single roller or two roller gets rid of band and directly gets rid of into amorphous height silicon strip from liquid state, its surface quality and template poor, preparation is difficult.
4, controlled rolling method, carry out toughness reinforcing by elements such as such as Ni, Ti, Cr, B, CU units to material, it is good that the steel band manufactured in this way has surface shape, the width of product and the wide feature of thickness range, but the interpolation of alloying element, have impact on magnetic property to a certain extent.
The present invention is that flow process is short, steel billet does not need to be cooled to room temperature, process adjustments ability is strong, the advantage of hot-rolled sheet good plate cut and low cost not only utilizing CSP to have, and by the casting process of the application, reduce column crystal size, and mate suitable hot rolling technology, obtain desirable fibrous tissue, prepare magnetic property and the good high silicon steel of processing characteristics.
Through retrieval, Chinese Patent Application No. is the document of 200710099130.5, it discloses one " cold rolling process of high silicon plate ", though its can cold rolling for high silicon steel, complex process, be not suitable for produce in enormous quantities.
Summary of the invention
The present invention is directed to internal component and the uneven microstructure of prior art existence, impact is had to require processing unit on the homogeneity of magnetic property high, environmental pollution also comparatively large or pore and be mingled with and be difficult to control, or surface quality and template poor, the deficiency of preparation difficulty, there is provided a kind of column crystal volume ratio to be not less than 90%, obtain thinner fibrous tissue, processed-type and magnetic property good siliceous 4.5 ~ 7% high silicon steel and preparation method thereof.
Realize the measure of above-mentioned purpose:
The high silicon steel that CSP is produced, its component and weight percent content are: C≤0.003%, Si: 4.5% ~ 7.0%, Mn:0.25% ~ 1.0%, Al≤0.008%, S≤0.0050%, N≤0.0030%, [O]≤20PPm, all the other are Fe and inevitable impurity; Column crystal size≤1mm, column crystal ratio is not less than 90%, is fibrous tissue.
Prepare the method for the high silicon steel that a kind of CSP is produced, its step:
1) smelt by mentioned component;
2) cast, in its process, control superheat of liquid steel at 10 DEG C ~ 30 DEG C, the speed of cooling of secondary cooling water section is not less than 100 DEG C/min, the pressure of liquid core is carried out after the amount of solidifying of molten steel reaches 10 ~ 30%, draft controls 5 ~ 25%, and controls column crystal size≤1mm in strand, and column crystal ratio is not less than 90%;
3) carry out strand heating, control Heating temperature at 1100 DEG C ~ 1180 DEG C;
4) be rolled, control finishing temperature at 850 DEG C ~ 950 DEG C, the first percentage pass reduction is not less than 60%, and last percentage pass reduction is not less than 30%; Fibrous tissue ratio is not less than 80%, fibrous tissue width≤50 μm;
5) batch, its temperature controls at 750 DEG C ~ 800 DEG C;
6) in bell furnace insulation, soaking time is not less than 2 hours, and adopts nitrogen protection;
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and the first reduction in pass is not less than 60%;
8) carry out high temperature annealing, control annealing temperature at 1050 DEG C ~ 1150 DEG C, and be incubated at this temperature, soaking time is not less than 10 hours, and protective atmosphere is H
2+ N
2gas mixture, its H
2: N
2=1:3.
The function and mechanism of principal element of the present invention and technology controlling and process
Utilize the present invention in existing CSP Equipment Foundations, adopt the unique design of continuous casting process, rolling technology, improve column crystal ratio, reduce column crystal size; And hot rolling technology is controlled, obtain thinner fibrous tissue.Warm-rolling, ensures head reduction in pass.
Molten steel composition design considerations is as follows:
C:C≤0.003%; Higher than 0.003%, finished product needs decarburizing annealing, forms internal oxidition, affects magnetic property.
Si:4.5% ~ 7.0%, Si is the principal element improving resistivity, is the most important alloying element reducing iron loss; But it is higher than 7.0%, intensity is excessive, rolling difficulty; If lower than 4.5%, magnetic property is poor.
Al:Al≤0.008%, the tiny AlN of too high easy precipitation, affect magnetic property.
Mn:0.25% ~ 1.0%, Mn mainly plays solid S effect, suitable Mn content can control MnS second-phase the best separate out and grow up, when its content is less than 0.25%, Gu the effect of S is weak, if higher than 1.0%, cost of alloy can be caused to increase, cold rolling difficulty.
The present invention adopts CSP to produce the process characteristic of high silicon steel:
1) control superheating temperature, the secondary cooling water Duan Qiangleng of molten steel, liquid core is depressed, to obtain column crystal≤1mm, and the steel billet of column crystal ratio >=90%.
2) accurately control tunnel temperature at 1100 DEG C ~ 1180 DEG C, to be conducive to the precipitation of precipitated phase and to grow up, and good (100) texture can be obtained.If temperature is higher than 1180 DEG C, in steel billet, second-phase is mingled with MnS and AlN solid solution and can not separates out and grow up.Second-phase is in cooling and the tiny precipitation of the operation of rolling thereupon.If temperature is lower than 1100 DEG C, increase the load of follow-up rolling.
3) rolling F1 draft is not less than 60%, and last percentage pass reduction is not less than 30%, and forebay and afer bay heavy reduction rate can attenuated fibers tissues.
4) accurately control finishing temperature at 850 DEG C ~ 950 DEG C, be because in this temperature range, good tissue can be obtained, and control to provide condition for the temperature after batching.Why by oiler temperature control at 750 ~ 800 DEG C, be the temperature condition providing suitable to can be warm-rolling.
5) hot rolled coil insulation, adopt residual heat insulation, soaking time is not less than 2 hours, makes temperature and homogeneous microstructure, is convenient to follow-up warm-rolling.
6) warm-rolling, why control its cold rolling temperature at 150 DEG C ~ 500 DEG C, rolling pass≤4 passage, the first reduction in pass>=60%, to obtain good rolling, avoids DO
3with a large amount of precipitations of B2 brittlement phase.Heavy reduction can reduce rolling pass, reduces calorific loss, ensures that temperature is at 150 DEG C ~ 500 DEG C.
The present invention compared with prior art, in existing CSP Equipment Foundations, adopts suitable casting process, improves column crystal ratio, reduces column crystal size; Hot rolling technology is controlled, obtains thinner fibrous tissue, ensure the rolling of warm-rolling.The present invention can process for processing type and the good high silicon steel of magnetic property.
Embodiment
Below the present invention is described in detail:
Table 1 is various embodiments of the present invention and the list of comparative example chemical element value;
Table 2 is the main technique value list of various embodiments of the present invention and comparative example;
Table 3 is the performance test results list of various embodiments of the present invention and comparative example.
Various embodiments of the present invention are prepared according to following technique:
1) smelt by mentioned component;
2) cast, in its process, control superheat of liquid steel at 10 DEG C ~ 30 DEG C, the speed of cooling of secondary cooling water section is not less than 100 DEG C/min, the pressure of liquid core is carried out after the amount of solidifying of molten steel reaches 10 ~ 30%, draft controls 5 ~ 25%, and controls column crystal size≤1mm in strand, and column crystal ratio is not less than 90%;
3) carry out strand heating, control Heating temperature at 1100 DEG C ~ 1180 DEG C;
4) be rolled, control finishing temperature at 850 DEG C ~ 950 DEG C, the first percentage pass reduction is not less than 60%, and last percentage pass reduction is not less than 30%; Fibrous tissue ratio is not less than 80%, fibrous tissue width≤50 μm;
5) batch, its temperature controls at 750 DEG C ~ 800 DEG C;
6) in bell furnace insulation, soaking time is not less than 2 hours, and adopts nitrogen protection;
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and the first reduction in pass is not less than 60%;
8) carry out high temperature annealing, control annealing temperature at 1050 DEG C ~ 1150 DEG C, and be incubated at this temperature, soaking time is not less than 10 hours, and protective atmosphere is H
2+ N
2gas mixture, its H
2: N
2=1:3.
The constituent content value list (wt%) of table 1 various embodiments of the present invention and comparative example
| Embodiment | C | Si | Mn | Al | S | N | [0](PPm) |
| 1 | 0.0025 | 5.20 | 0.50 | 0.0030 | 0.0045 | 0.0015 | 18 |
| 2 | 0.0010 | 4.80 | 0.98 | 0.0048 | 0.0049 | 0.0018 | 15 |
| 3 | 0.0018 | 6.30 | 0.30 | 0.0016 | 0.002 | 0.0012 | 12 |
| 4 | 0.0026 | 6.50 | 0.28 | 0.0028 | 0.0035 | 0.001 | 10 |
| 5 | 0.0030 | 6.60 | 0.35 | 0.0065 | 0.0038 | 0.0026 | 8 |
| 6 | 0.0015 | 6.99 | 0.46 | 0.0075 | 0.0032 | 0.0016 | 13 |
| 7 | 0.0022 | 6.20 | 0.43 | 0.0019 | 0.0019 | 0.0028 | 17 |
| 1 | 0.0031 | 6.50 | 0.30 | 0.25 | 0.0051 | 0.0035 | 25 |
| 2 | 0.0018 | 6.30 | 0.35 | 0.30 | 0.0035 | 0.0018 | 13 |
| 3 | 0.0032 | 6.85 | 0.40 | 0.40 | 0.0062 | 0.0025 | 10 |
| 4 | 0.0010 | 4.75 | 0.50 | 0.15 | 0.0028 | 0.0026 | 18 |
The processing parameter value list of table 2 various embodiments of the present invention and comparative example
Table 3 is the performance test results list of various embodiments of the present invention and comparative example
Remarks: finished product thickness is 0.30mm.
As can be seen from Table 3, the high silicon steel warm-rolling adopting the present invention to produce is good, can be rolled into product thickness 0.30mm height silicon steel.The power frequency of finished product and high frequency magnetic can be good, P1.0/400≤14W/kg, P1.0/1000≤61.50 W/kg.
This embodiment is only the best and exemplifies, the restricted enforcement not to technical solution of the present invention.
Claims (2)
1., with the high silicon steel that CSP is produced, its component and weight percent content are: C≤0.003%, Si: 4.5% ~ 7.0%, Mn:0.25% ~ 1.0%, Al≤0.008%, S≤0.0050%, N≤0.0030%, [O]≤20PPm, all the other are Fe and inevitable impurity; Column crystal size≤1mm, column crystal ratio is not less than 90%, is fibrous tissue.
2. the method for the high silicon steel of a kind of CSP production of preparation, its step:
1) smelt by mentioned component;
2) cast, in its process, control superheat of liquid steel at 10 DEG C ~ 30 DEG C, the speed of cooling of secondary cooling water section is not less than 100 DEG C/min, the pressure of liquid core is carried out after the amount of solidifying of molten steel reaches 10 ~ 30%, draft controls 5 ~ 25%, and controls column crystal size≤1mm in strand, and column crystal ratio is not less than 90%;
3) carry out strand heating, control Heating temperature at 1100 DEG C ~ 1180 DEG C;
4) be rolled, control finishing temperature at 850 DEG C ~ 950 DEG C, the first percentage pass reduction is not less than 60%, and last percentage pass reduction is not less than 30%; Fibrous tissue ratio is not less than 80%, fibrous tissue width≤50 μm;
5) batch, its temperature controls at 750 DEG C ~ 800 DEG C;
6) in bell furnace insulation, soaking time is not less than 2 hours, and adopts nitrogen protection;
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and the first reduction in pass is not less than 60%;
8) carry out high temperature annealing, control annealing temperature at 1050 DEG C ~ 1150 DEG C, and be incubated at this temperature, soaking time is not less than 10 hours, and protective atmosphere is H
2+ N
2gas mixture, its H
2: N
2=1:3.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063473A (en) * | 2015-09-07 | 2015-11-18 | 东北大学 | Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip cast rolling and DID (deformation induced disordering) |
| CN105112617A (en) * | 2015-09-25 | 2015-12-02 | 包头市威丰电磁材料有限责任公司 | Novel high-temperature annealing process of cold-rolled oriented silicone steel |
| CN108277434A (en) * | 2018-03-19 | 2018-07-13 | 武汉钢铁有限公司 | The precipitation enhancement type ferritic steel and production method that a kind of yield strength is 900MPa grades |
| CN115383408A (en) * | 2022-09-09 | 2022-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rolling process of high-manganese non-magnetic steel |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258927A (en) * | 1989-03-30 | 1990-10-19 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having high magnetic flux density |
| JP2003027196A (en) * | 2001-07-16 | 2003-01-29 | Nippon Steel Corp | Method of manufacturing ultra-high mangnetic flux density grain-oriented silicon steel sheet having high magnetic flerd iron loss and excellent film characteristic |
| CN101935800A (en) * | 2010-09-30 | 2011-01-05 | 东北大学 | High-silicon-steel thin belt and preparation method thereof |
| CN102002567A (en) * | 2010-12-15 | 2011-04-06 | 北京科技大学 | Production method of oriented high-silicon-steel thin plates |
| CN102126110A (en) * | 2011-01-18 | 2011-07-20 | 东北大学 | Method for manufacturing high-silicon steel thin strip |
| CN102151695A (en) * | 2011-01-18 | 2011-08-17 | 东北大学 | Manufacturing method of Cold-rolled non-oriented high-silicon steel thin strip |
| CN102816972A (en) * | 2012-09-07 | 2012-12-12 | 武汉钢铁(集团)公司 | Clad high silicon steel hot rolled plate and method for preparing same |
| CN103074476A (en) * | 2012-12-07 | 2013-05-01 | 武汉钢铁(集团)公司 | Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing |
| CN104120234A (en) * | 2014-07-02 | 2014-10-29 | 东北大学 | Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate |
-
2015
- 2015-02-09 CN CN201510066055.7A patent/CN104630619B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02258927A (en) * | 1989-03-30 | 1990-10-19 | Nippon Steel Corp | Production of grain-oriented silicon steel sheet having high magnetic flux density |
| JP2003027196A (en) * | 2001-07-16 | 2003-01-29 | Nippon Steel Corp | Method of manufacturing ultra-high mangnetic flux density grain-oriented silicon steel sheet having high magnetic flerd iron loss and excellent film characteristic |
| CN101935800A (en) * | 2010-09-30 | 2011-01-05 | 东北大学 | High-silicon-steel thin belt and preparation method thereof |
| CN102002567A (en) * | 2010-12-15 | 2011-04-06 | 北京科技大学 | Production method of oriented high-silicon-steel thin plates |
| CN102126110A (en) * | 2011-01-18 | 2011-07-20 | 东北大学 | Method for manufacturing high-silicon steel thin strip |
| CN102151695A (en) * | 2011-01-18 | 2011-08-17 | 东北大学 | Manufacturing method of Cold-rolled non-oriented high-silicon steel thin strip |
| CN102816972A (en) * | 2012-09-07 | 2012-12-12 | 武汉钢铁(集团)公司 | Clad high silicon steel hot rolled plate and method for preparing same |
| CN103074476A (en) * | 2012-12-07 | 2013-05-01 | 武汉钢铁(集团)公司 | Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing |
| CN104120234A (en) * | 2014-07-02 | 2014-10-29 | 东北大学 | Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105063473A (en) * | 2015-09-07 | 2015-11-18 | 东北大学 | Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip cast rolling and DID (deformation induced disordering) |
| CN105112617A (en) * | 2015-09-25 | 2015-12-02 | 包头市威丰电磁材料有限责任公司 | Novel high-temperature annealing process of cold-rolled oriented silicone steel |
| CN108277434A (en) * | 2018-03-19 | 2018-07-13 | 武汉钢铁有限公司 | The precipitation enhancement type ferritic steel and production method that a kind of yield strength is 900MPa grades |
| CN108277434B (en) * | 2018-03-19 | 2020-08-04 | 武汉钢铁有限公司 | Precipitation strengthening ferritic steel with yield strength of 900MPa and production method thereof |
| CN115383408A (en) * | 2022-09-09 | 2022-11-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rolling process of high-manganese non-magnetic steel |
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