CN106755790A - A kind of utilization magnetic field recovery annealing improves the process of silicon steel performance - Google Patents
A kind of utilization magnetic field recovery annealing improves the process of silicon steel performance Download PDFInfo
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- CN106755790A CN106755790A CN201611005071.6A CN201611005071A CN106755790A CN 106755790 A CN106755790 A CN 106755790A CN 201611005071 A CN201611005071 A CN 201611005071A CN 106755790 A CN106755790 A CN 106755790A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
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Abstract
The present invention relates to the process that a kind of utilization magnetic field recovery annealing improves silicon steel performance, during silicon steel recovery annealing, apply the magnetic field that intensity is 0 6T to silicon steel, the magnetic field is magnetostatic field, the temperature range of the recovery annealing is 450 600 DEG C, and the time range of recovery annealing is 0 30 minutes under magnetic field.Magnetostatic field is applied to orientation silicon steel by the present invention carries out recovery annealing in 550 degree of low-temperature spaces, is that silicon steel secondary recrystallization process establishes preferable texture basis, and making the goss texture of silicon steel finished product strengthens.Because the annealing process time is short, temperature is low, and magnetic field intensity is small, will be easier control and industrially carries out popularization and application.
Description
Technical field
The present invention relates to silicon steel heat-treatment technology method, and in particular to one kind improves silicon steel performance using magnetic field recovery annealing
Process.
Background technology
Orientation silicon steel is a kind of important soft magnetic materials for being widely used in electric power, electronics industry, be mainly used as various motors,
The iron core of generator and transformer.Magnetic property with core loss (iron loss) with magnetic induction intensity (magnetic strength) as representative is cold rolling taking
To the main performance indications of silicon steel, in order to reach the purpose of energy-conservation and environmental protection, the whole world is all being devoted to developing and is producing
The orientation silicon steel of magnetic strength high and low iron loss.
Orientation silicon steel thin belt is typically further cold rolling by finished product orientation silicon steel and prepared by annealing, the production of orientation silicon steel
Flow is generally：(- reply is moved back for molten iron demanganize-smelting-application of vacuum-continuous casting and hot rolling-normalizing and pickling-cold rolling-decarburizing annealing
Fire)-apply magnesia-high annealing-smooth stretching annealing and apply insulating barrier.Orientation silicon steel obtains crystal grain orientation in processing technology
The consistent goss texture for being arranged in direction of easy axis.Crystal grain is higher in direction of easy axis degree of orientation, then magnetic conductivity is higher, iron loss
It is lower.
Research finds that secondary recrystallization is to be formed { 110 }<001>The basic reason of goss texture.And it is first during cold-reduced sheet annealing
First carry out recovery annealing, formation important of the Recovery Process for secondary recrystallization goss texture.It is cold in Recovery Process
Roll tissue and produce subgrain, subgrain is polymerized to form recrystallization nucleus in high annealing is subsequent recrystallization process, and the nucleus is
It is advantageous for being formed the tissue and texture of goss texture.Therefore, the subgrain for being formed in Recovery Process is silicon steel texture to tying again
The improvement that the formation of brilliant process goss texture has direct and important influence, recovery annealing technique is beneficial to recrystallization process shape
Into goss texture, and then improve the magnetic property of silicon steel.
In recent years, metallurgical and material prepares extensive concern of this research field by international academic community under magnetic field, turns into
Emerging science frontier research field.Magnetic-field annealing has drawn attention in terms of the microstructure of control material, to being at present
Only, magnetic field has been applied to the recrystallization process of silicon steel, and finds that the application in magnetic field can improve the favorable texture of silicon steel, improves
The magnetic property of silicon steel, reduce loss.But current magnetic-field annealing be mainly used in recrystallization process, it is necessary to magnetic field intensity it is larger
(being more than 1T), annealing temperature is also (being higher than 750 degree) very high, is difficult industrialization.How by the simple operation in magnetic field, it is easier to work
Industry is major issue that is present and facing in the future.
The content of the invention
The technical problems to be solved by the invention are to provide the technique that a kind of utilization magnetic field recovery annealing improves silicon steel performance
Method.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of utilization magnetic field recovery annealing improves the process of silicon steel performance, during silicon steel recovery annealing, to silicon
It is the magnetic field of 0-6T that steel applies intensity.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the magnetic field is magnetostatic field.
Further, the temperature range of the recovery annealing is 450-600 DEG C.
Further, the time range of recovery annealing is 0-30 minutes under magnetic field.
Further, the time of recovery annealing is 5 minutes under magnetic field.
Further, described magnetic field intensity is 0-1T.
Further, described magnetic field intensity is 0.5T.
Further, the silicon steel is orientation silicon steel.
The beneficial effects of the invention are as follows：Magnetostatic field is applied to silicon steel during recovery annealing and advantageously forms height to obtain
The tissue and structure of this texture, and then prepare the orientation silicon steel of high magnetic characteristics.The present invention is applied during silicon steel recovery annealing
Plus magnetostatic field, to change its microstructure, the crystal grain orientation of silicon steel is improved, so as to improve the magnetic property of silicon steel.Using magnetostatic field
The grain-oriented magnetocrystalline anisotropy energy of dependence can be produced in strip, this provides additional driving force for crystal boundary migration.Simultaneously
Externally-applied magnetic field induces the magnetic order for producing and reduces the diffusivity of atom, and then reduces the mobility of crystal boundary.The present invention passes through
This series of effects come improve orientation silicon steel annealing after texture.
Magnetostatic field is applied to orientation silicon steel by the present invention carries out recovery annealing in 550 degree of low-temperature spaces, and be that silicon steel is secondary ties again
Brilliant process establishes preferable texture basis, and making the goss texture of silicon steel finished product strengthens.Because the annealing process time is short, temperature is low,
Magnetic field intensity is small, will be easier control and industrially carries out popularization and application.
Brief description of the drawings
Fig. 1 is matching used heat-treatment furnace front view of the invention；
Fig. 2 is matching used annealing device top view of the invention；
Fig. 3 is (001) high preferred orientation subgrain electron diffraction pattern under the conditions of transmission electron microscope observing 0.5T；
Fig. 4 is (001) the high preferred orientation subgrain enlarged drawing (details in a play not acted out on stage, but told through dialogues scanning) in Fig. 3；
Fig. 5 is (001) the high preferred orientation subgrain enlarged drawing (light field scanning) in Fig. 3.
In accompanying drawing, the list of parts representated by each label is as follows：
1. wire, 2. heating rod, 3. refractory brick, 4. resistance to guncotton, 5. copper pipe, 6. cooling water, 7. silicon steel sheet, 8. carrying roller；9.
Motor；10. conveyer belt
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
It is as shown in Figure 1 and Figure 2 matching used treatment furnace structure schematic diagram of the invention, silicon steel sheet 7 is placed on transmission
On band 10, the control carrying roller 8 of motor 9, carrying roller 8 drives conveyer belt 10 to be driven, nitrogen is connected with stove.Heating rod is controlled by thermocouple
2 are heated, and heating rod 2 is connected in parallel by wire 1.In the adjacent winding copper pipe 5 of heating rod 2, galvanization is produced parallel to rolling
The uniform magnetic field in direction processed.The inside of copper pipe 5 is cooling water 6, and outside is surrounded by resistance to guncotton 4, is wrapped up by refractory brick 3 outside heating rod 2,
Annealing temperature is 450-600 DEG C, annealing time selection 0-30min；Magnetic field intensity selects 0T-6T.Complete to move back in magnetic field
By sample surfaces even spread magnesia barrier coat after fire, feeding resistance heat-treatment furnace carries out 1050~1150 DEG C, pure hydrogen
Under gas shielded atmosphere, the high temperature anneal of 6~12 hours, make orientation silicon steel complete secondary recrystallization, furnace cooling afterwards.Most
Magnetism testing is carried out to sample using orientation silicon steel special MATS-2010M silicon steel measurement apparatus afterwards.
Above-mentioned utilization magnetic field recovery annealing is improved in the process of silicon steel performance, and the direction for applying magnetostatic field is oriented silicon
The rolling direction of steel, the interleaving agent for being used is the interleaving agent with magnesia as main component.
Described silicon steel sample, using the rolled samples of orientation silicon steel in industrial production, its main component is C：<30ppm,
Si：~3%.
Embodiment 1
From the rolled samples silicon steel sheet 7 of orientation silicon steel in industrial production, conveyer belt 10 is placed it in above with certain
Speed is advanced, and nitrogen is led in stove not oxidized in annealing process to ensure silicon steel；Silicon steel is in heating furnace in annealing process
In constant temperature zone, the magnetic direction that copper pipe 5 is produced is along silicon steel rolling direction.Silicon-steel sheet annealing temperature is 550 DEG C, and annealing time is
5 minutes, magnetic field intensity was 1T；By the sample surfaces even spread magnesia interleaving agent after recovery annealing；Magnesia painting will be coated
The sample feeding resistance heat-treatment furnace of layer carry out 1100 DEG C, under pure hydrogen protective atmosphere, the high temperature anneal of 12 hours, make
Orientation silicon steel completes recrystallization；Magnetic property measurement finally is carried out to orientation silicon steel finished product.
To be contrasted, take commonly carries out above-mentioned the high temperature anneal without orientation silicon steel sample under magnetic-field annealing, finally right
Orientation silicon steel finished product carries out magnetic property measurement.
Table 1 annealed through high temperature crystallization after being silicon steel sheet under the conditions of commonly without magnetic field recovery annealing 5 minutes after six samples
Six magnetic samples after recovery annealing is annealed for 5 minutes through high temperature crystallization under the conditions of the average value of product magnetic property, and magnetic field intensity 1T
The Data Comparison of the average value of performance, wherein B8It is six average values of sample magnetic strength；rBIt is compared to without magnetic field under magnetic fields
In the case of magnetic strength growth rate；DBIt is six errors of sample magnetic strength；P17/50It is six average values of sample iron loss；rPIt is magnetic field
Compared to the reduced rate without iron loss under magnetic field conditions under effect；DPIt is six errors of sample iron loss.(B8Finger takes magnetic field intensity and is
Magnetic strength value during 800A/m；P17/50Finger takes magnetic strength for 1700mT, core loss value during 50Hz)
| Magnetic field intensity (T) | B8(mT) | rB | DB | P17/50(W/kg) | rP | DP |
| 0 | 1786 | - | ± 1.6% | 1.53 | - | ± 6.4% |
| 1 | 1839 | 3.0% | ± 0.6% | 1.38 | 9.8% | ± 3.2% |
Be can see with reference to the test result in above-described embodiment, the orientation silicon steel prepared using magnetostatic field recovery annealing
Magnetic strength value significantly larger than will not apply the magnetic strength value in magnetic field, and core loss value is also well below without the iron loss for applying magnetostatic field
Value.
Embodiment 2
Above-mentioned magnetic field intensity is adjusted to 0.5T, recovery annealing process and heat treatment temperature are constant；Simultaneously to be contrasted,
Take commonly carries out above-mentioned the high temperature anneal without orientation silicon steel sample under the recovery annealing of magnetic field, and finally orientation silicon steel finished product is carried out
Magnetic property is measured.
Table 2 annealed through high temperature crystallization after being silicon steel sheet under the conditions of commonly without magnetic field recovery annealing 5 minutes after six samples
Six samples after recovery annealing is annealed for 5 minutes through high temperature crystallization under the conditions of the average value of product magnetic property, and magnetic field intensity 0.5T
The Data Comparison of the average value of magnetic property, wherein B8It is six average values of sample magnetic strength；rBIt is compared to without magnetic under magnetic fields
The growth rate of magnetic strength in the case of；DBIt is six errors of sample magnetic strength；P17/50It is six average values of sample iron loss；rPIt is magnetic
Compared to the reduced rate without iron loss under magnetic field conditions under field action；DPIt is six errors of sample iron loss.
| Magnetic field intensity (T) | B8(mT) | rB | DB | P17/50(W/kg) | rP | DP |
| 0 | 1786 | - | ± 1.6% | 1.53 | - | ± 6.4% |
| 0.5 | 1836 | 2.8% | ± 0.9% | 1.35 | 12% | ± 3.5% |
Silicon steel thin slice is carried out on the thinning device of double jet electrolytics thinning, carry out transmission electron microscope observing.Entirely cutting thin regarding
, observed at least 10 photos of random shooting, as shown in Fig. 3, Fig. 4 and Fig. 5, subgrain tissue under 0.5T magnetic fields
It is more, and predominantly cubic texture (4-5), subgrain is mainly due to dislocation movement by slip and generation of climbing, the effect in magnetic field
Under make subgrain be easier to (110) be orientated, (001) face is increased.In subsequent high annealing recrystallization process, subgrain polymerization length
Greatly, degree of orientation silicon steel finished product higher is formed, silicon-steel magnetic energy is improved.
Be can see with reference to the test result in above-described embodiment, 0.5T magnetostatic fields are applied in the present invention to silicon-steel magnetic
There can be remarkable improvement, illustrate that performance can be prepared better than prepared by conventional annealing mode taking using less than the magnetostatic field annealings of 1T
To silicon steel.This will be with practical guided significance to the industrialization of magnetostatic field recovery annealing.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of utilization magnetic field recovery annealing improves the process of silicon steel performance, it is characterised in that in silicon steel recovery annealing mistake
Cheng Zhong, it is the magnetic field of 0-6T that intensity is applied to silicon steel.
2. utilization magnetic field according to claim 1 recovery annealing improves the process of silicon steel performance, it is characterised in that institute
Magnetic field is stated for magnetostatic field.
3. utilization magnetic field according to claim 1 recovery annealing improves the process of silicon steel performance, it is characterised in that institute
The temperature for stating recovery annealing is 450-600 DEG C.
4. utilization magnetic field according to claim 1 recovery annealing improves the process of silicon steel performance, it is characterised in that
The time range of recovery annealing is 0-30 minutes under magnetic field.
5. utilization magnetic field according to claim 1 recovery annealing improves the process of silicon steel performance, it is characterised in that
The time of recovery annealing is 5 minutes under magnetic field.
6. utilization magnetic field according to claim 1 recovery annealing improves the process of silicon steel performance, it is characterised in that institute
The magnetic field intensity stated is 0-1T.
7. the utilization magnetic field recovery annealing according to claim any one of 1-6 improves the process of silicon steel performance, and it is special
Levy and be, described magnetic field intensity is 0.5T.
8. the utilization magnetic field recovery annealing according to claim any one of 1-6 improves the process of silicon steel performance, and it is special
Levy and be, the silicon steel is orientation silicon steel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116356126A (en) * | 2023-03-30 | 2023-06-30 | 江苏甬金金属科技有限公司 | Ultrathin corrosion-resistant silicon steel strip and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539526A (en) * | 1990-11-30 | 1993-02-19 | Kawasaki Steel Corp | Manufacture of grain-oriented silicon steel sheet |
| CN1786248A (en) * | 2005-12-13 | 2006-06-14 | 武汉钢铁(集团)公司 | Production method for improving electromagnetic performance and bottom layer quality of copper containing orientation silicium steel |
| CN101348851A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing common oriented electrical steel by low temperature casting blank heating |
-
2016
- 2016-11-15 CN CN201611005071.6A patent/CN106755790A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0539526A (en) * | 1990-11-30 | 1993-02-19 | Kawasaki Steel Corp | Manufacture of grain-oriented silicon steel sheet |
| CN1786248A (en) * | 2005-12-13 | 2006-06-14 | 武汉钢铁(集团)公司 | Production method for improving electromagnetic performance and bottom layer quality of copper containing orientation silicium steel |
| CN101348851A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing common oriented electrical steel by low temperature casting blank heating |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116356126A (en) * | 2023-03-30 | 2023-06-30 | 江苏甬金金属科技有限公司 | Ultrathin corrosion-resistant silicon steel strip and preparation method thereof |
| CN116356126B (en) * | 2023-03-30 | 2024-04-19 | 江苏甬金金属科技有限公司 | Ultrathin corrosion-resistant silicon steel strip and preparation method thereof |
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Application publication date: 20170531 |