CN104726671A - Oriented electrical steel sheet and method for manufacturing the same - Google Patents
Oriented electrical steel sheet and method for manufacturing the same Download PDFInfo
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- CN104726671A CN104726671A CN201410806323.XA CN201410806323A CN104726671A CN 104726671 A CN104726671 A CN 104726671A CN 201410806323 A CN201410806323 A CN 201410806323A CN 104726671 A CN104726671 A CN 104726671A
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- groove
- oriented electrical
- laser
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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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The oriented electrical steel sheet has a groove in the steel sheet surface, and a silicon layer is deposited in the groove. The electrical steel sheet may be an electrical steel sheet in which recrystallization is not formed in the lower part of the groove. Moreover, the depth of the groove of the electrical steel sheet may be 5%-10% of the depth of the thickness of the steel sheet.
Description
Technical field
The present invention relates to a kind of oriented electrical steel and manufacture method thereof.
Background technology
Whether usually, according to keeping magnetic domain refinement to improve effect after stress relief annealing, magnetic domain thinning method is roughly divided into interim magnetic domain refinement and permanent magnetic domain refinement.
Interim magnetic domain thinning method is that a kind of shape farmland in 90 ° (Domain) makes magnetic domain refinement, uses to be reduced by heat energy or mechanical energy to greatest extent and to apply local stress on surface and the magnetic domain refinement technology of magnetoelastic energy that produces.
The permanent magnetic domain thinning method that iron loss also can be kept after destressing thermal treatment to improve effect is roughly divided into etching method, roll-in method and laser method.In described laser method, especially rely on the permanent magnetic domain thinning method of pulse laser by being formed groove by the evaporation of photograph portion material (Vaporization) at surface of steel plate during laser radiation, with iron loss improvement rate after the thermal treatment guaranteeing oriented electrical steel.
But, rely on the magnetic domain thinning method of pulse laser owing to forming groove by evaporation, therefore melting end can not be formed, in thermal treatment (destressing thermal treatment, SRA) front being difficult to guarantees iron loss improvement rate, and be difficult to form deep trench under steel plate translational speed (more than 0.5m/s) at a high speed, required iron loss cannot be demonstrated and improve effect.
When forming groove according to prior art by laser, because of the heat affecting that laser causes, as Fig. 4 it (a) be shown in groove 20 below can occur recrystallize 100 or as Fig. 4 it (b) be shown in groove below form crystal boundary 101 along groove 20, cause magneticflux-density deterioration.
Summary of the invention
One embodiment of the invention relates to the oriented electrical steel being formed with silicon layer above a kind of groove.
Another embodiment of the present invention relates to a kind of manufacture method of oriented electrical steel.
The oriented electrical steel of one embodiment of the invention is that a kind of surface is formed with groove, and described groove is formed with the oriented electrical steel of silicon layer.
Described electrical sheet can be the oriented electrical steel not forming recrystallize in the below of groove.
Described electrical sheet can be do not form the oriented electrical steel of crystal boundary in the below of groove along groove.
The gash depth of described electrical sheet can be 5% ~ 10% of steel plate thickness.
Described groove can be formed as oblique line relative to the rolling direction of electrical sheet, and described oblique line can in 82 ~ 98 ° relative to the rolling direction of steel plate.
The manufacture method of the oriented electrical steel of one embodiment of the invention, comprises the following steps: the electrical sheet before providing primary recrystallization or after primary recrystallization; The surface of described electrical sheet applies organic matter layer or inorganic layer; To being coated with the surface of steel plate irradiating laser of described organic matter layer or inorganic layer to form groove; Form silicon layer in the trench; Remove described organic matter layer or inorganic layer.
The groove formed in the step of described formation groove can be the groove not forming recrystallize.
The groove formed in the step of described formation groove can be the groove not forming crystal boundary along groove.
The output P of described irradiated laser and the ratio (P/S of sweep trace speed S
1/2) can meet the following conditions,
0.5J/mm
2≤E
d≤5.0J/mm
2，
5.0W·mm
1/2/s
1/2≤P/S
1/2≤13.0W·mm
1/2/s
1/2
The energy density E of described irradiated laser
dcan meet the following conditions, 0.5J/mm
2≤ E
d≤ 5.0J/mm
2.
The output P of described irradiated laser can meet the following conditions, P >=500W.
The described laser irradiated in the step of described formation groove, the beam length dt on its direction of illumination and the width of light beam L in rolling direction can meet the following conditions,
0.20≤L/dt≤1.0
dt≤100μm。
The gash depth formed in the step of described formation groove can be 5% ~ 10% of steel plate thickness.
The described laser irradiated in the step of described formation groove, its rolling direction relative to electrical sheet can be irradiated with oblique line.With oblique line irradiate angle can be 82 ~ 98 °.
The translational speed of electrical sheet can be more than 0.5m/s.
Described laser can be continuous wave laser (Continuous Wave Laser).
Usually, in the manufacture of oriented electrical steel, the magnetic domain refinement relying on laser will be carried out after slab (slab) hot rolling manufactured by continuous casting process → hot-rolled sheet annealing → cold rolling → decarburizing annealing (primary recrystallization) → final annealing (secondary recrystallization), but the magnetic domain process for refining relying on described laser can be implemented in any step in the present invention, before cold rolling rear decarburizing annealing or after decarburizing annealing.
Oriented electrical steel of the present invention reduces the heat affecting that laser causes to greatest extent when forming groove, can not form recrystallize, therefore make the demagnetizing field of trench portions weaken, thus can suppress the deterioration of magneticflux-density to greatest extent at groove.
In the present invention, the heat affecting that when reducing to greatest extent to form groove, laser causes, therefore can not form crystal boundary along groove, thus can suppress the deterioration of magneticflux-density to greatest extent.
And, form groove by the laser beam irradiated at a high speed, therefore can so that the electrical sheet of the high-speed mobile of more than 0.5m/s to form groove.
In addition, described groove is formed as oblique line relative to the rolling direction of steel plate, therefore makes the demagnetizing field of trench portions weaken, thus can suppress the deterioration of magneticflux-density to greatest extent.Relative to the rolling direction of steel plate, described oblique line can be 82 ~ 98 °.
Be formed with silicon layer in oriented electrical steel groove of the present invention, therefore resistivity is high and iron loss improvement rate excellent.
In addition, oriented electrical steel of the present invention is owing to being formed with silicon layer in groove, so magnetostriction rate excellent, the finished product therefore utilizing electrical sheet of the present invention to produce have excellent noise properties.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the oriented electrical steel board fabrication method of one embodiment of the invention.
Fig. 2 is the schematic diagram to being formed at the groove shape of surface of steel plate during electrical sheet surface irradiation laser.
Fig. 3 is the schematic diagram according to the beam length dt on laser scanning line the direction of the present invention and width of light beam L in rolling direction.
The schematic diagram of the recrystallize that Fig. 4 produces when being and forming groove by prior art and crystal boundary.
Embodiment
The following example of reference accompanying drawing and detailed description, just can be expressly understood advantage of the present invention, feature and realize the method for these advantage and disadvantages.But the present invention can be out of shape enforcement in a variety of different ways, is not limited to the following example.There is provided the object of the following example to be, fully openly the present invention has one comprehensively to understand to make those skilled in the art to summary of the invention, and protection scope of the present invention should be as the criterion with claims.Reference numeral identical in specification sheets in the whole text represents identical integrant.
Below, to the embodiment of the present invention for making electrical sheet magnetic domain refinement surface of steel plate being formed with groove (groove) be described.
Fig. 2 demonstrates vertical direction irradiating laser and the groove 20 formed at certain intervals along the rolling direction of electrical sheet 10.
The electrical sheet 10 of one embodiment of the invention is the oriented electrical steel a kind of surface of steel plate being formed with groove 20 and being formed with silicon layer 40 in described groove.
And described groove 20 can be the groove not forming recrystallize in below.
When forming groove by existing magnetic domain process for refining, because of the heat affecting that laser causes, as Fig. 4 it (a) be shown in groove below can form recrystallize, and described recrystallize can make the demagnetizing field of trench portions strengthen, and causes magneticflux-density deterioration.
But, in the present invention, by controlling laser irradiation condition, making can not form recrystallize in the below of groove, therefore can suppress the deterioration of magneticflux-density.
And described groove can be the groove not forming crystal boundary along groove.
When forming groove by existing magnetic domain process for refining, because of the heat affecting that laser causes, as Fig. 4 it (b) be shown in groove below can form crystal boundary along groove, thus the demagnetizing field of trench portions is strengthened, causes magneticflux-density deterioration.
But, in the present invention, by controlling laser irradiation condition, making can not form crystal boundary in the below of groove, therefore can suppress the deterioration of magneticflux-density to greatest extent.
In addition, described groove 20 is formed as oblique line relative to the rolling direction of steel plate, to make the demagnetizing field of trench portions weaken, thus can suppress the deterioration of magneticflux-density to greatest extent.
Relative to the rolling direction of steel plate, described oblique line can be 82 ~ 98 °.
In addition, the degree of depth of described groove 20 can be 5% ~ 10% of steel plate thickness.
Fig. 1 is the schematic diagram of the manufacture method of the oriented electrical steel of one embodiment of the invention.
The manufacture method of the electrical sheet of the embodiment of the present invention, comprises the following steps: provide the steel plate after rolling 10; At surface-coated organic matter layer or the inorganic layer 30 of described steel plate 10; To being coated with the surface of steel plate irradiating laser of described organic matter layer or inorganic layer 30 to form groove 20; Silicon layer is formed in described groove 20; Remove described organic matter layer or inorganic layer 30.
First, as shown in Fig. 1 it (a), provide the steel plate after rolling, then apply organic matter layer or inorganic layer 30.Described organic matter layer or inorganic layer 30 can have insulativity.
Manufacturing the process of oriented electrical steel is first heat packs containing the steel billet of Si and after carrying out hot rolling, then through decarburizing annealing and high temperature annealing.In the manufacture method of the oriented electrical steel of one embodiment of the invention, any step before or after decarburizing annealing can carry out magnetic domain refinement.
In addition, to described organic matter layer or inorganic layer 30 without any restriction, as long as namely remove the material that can be removed by clean-out system in the technique of organic matter layer or inorganic layer 30 at subsequent technique.
By forming groove 20 to the electrical sheet irradiating laser being coated with described organic matter layer or inorganic layer 30.
As described in Fig. 1 it (b), be melted by laser radiation basis pontis, its a part of resolidification and form groove 20.
When forming groove 20, be coated on organic matter layer on electrical sheet surface or inorganic layer 30 is removed in the lump by laser, thus expose the surface of electrical sheet in groove 20 part.
And, when irradiating described laser, carrying out blowing down (blowing) while basis pontis is melted, making can not remain smelting zone at the central part of groove 20.
When forming groove 20 by laser radiation, the shape being formed in the laser beam on surface of steel plate is not limited to spherical or oval (oval) shape.
And described laser can use continuous wave laser.
By laser radiation, there is iron loss before heat treatment afterwards and improve effect, and the shape of laser beam can meet with following formula (1) and formula (2), in order to avoid form recrystallize at groove 20,
0.20≤L/dt≤1.0----------(1)
dt≤100μm----------(2)
Wherein, dt represents the beam length in laser scanning line direction, and L represents the width of light beam in rolling direction, as shown in Figure 2.
Now, if L/dt value is greater than 1.0, then during formation groove 20, heat affecting increases further, can form secondary recrystallization, can not demonstrate iron loss and improve effect at the groove 20 of electrical sheet.
If L/dt value is less than 0.2, then groove 20 width of rolling direction is narrower, and melt portions is not easily blown and flown, and is therefore difficult to by being melted in surface of steel plate the groove 20 that Formation Depth reaches 5 ~ 10% of steel plate thickness, and the form layers of groove is uneven and formed dark not, thus be difficult to form silicon layer.
Although can melt at groove simultaneously, in order to avoid forming recrystallize at groove, the energy density E of laser
dcan meet with following formula (3),
0.5J/mm
2≤E
d≤5.0J/mm
2----------(3)
If laser energy density is greater than 5.0J/mm
2, then form too much melting end, can not guarantee that the iron loss before thermal treatment improves effect, if laser energy density is less than 0.5J/mm
2, then can not ensure the degree of depth of the groove of the iron loss improvement rate for guaranteeing heat-treated steel plate, thus can not guarantee that the iron loss after thermal treatment improves effect.Laser energy density can also be 0.5J/mm
2~ 2.5J/mm
2.
In addition, the ratio (P/S of Laser output P and sweep trace speed S
1/2) condition of formula (4) can be met,
5.0W·mm
1/2/s
1/2≤P/S
1/2≤13.0W·mm
1/2/s
1/2----------(4)
Wherein, P represents that laser on average exports, and S represents sweep trace speed.
If P/S
1/2value is greater than 13.0Wmm
1/2/ s
1/2the thickness offset then forming excessive melting end and groove resolidification layer becomes maximization, therefore the iron loss after can not guaranteeing thermal treatment is improved effect and is reached more than 5%, and the heat affecting caused because of laser, can form recrystallize and can form crystal boundary along groove at groove.If P/S
1/2value is less than 5.0Wmm
1/2/ s
1/2, then can not guarantee enough gash depths, the iron loss that can not play more than 5% after thermal treatment improves effect.P/S
1/2value can also be 8Wmm
1/2/ s
1/2~ 12Wmm
1/2/ s
1/2.
In addition, Laser output P can meet following formula (5), in order to avoid the zone of oxidation caused in sidewall and the below formation laser radiation of groove,
P≥500W----------------(5)
When Laser output P is less than 500W, is difficult to form groove under sweep velocity at a high speed, and causes surface oxidation because of oxidation during laser radiation.
Laser irradiation condition of the present invention is fast relative to the sweep trace speed of the Output of laser of laser, therefore the heat affecting that laser causes is reduced to greatest extent, recrystallize can not be formed at groove 20 or can not crystal boundary be formed, thus the deterioration of magneticflux-density can be suppressed to greatest extent.And, so that the electrical sheet of the speed high-speed mobile of more than 0.5m/s can form groove.
After forming groove, as shown in Fig. 1 it (c), the fluted electrical sheet of formation forms silicon layer.
Silicon layer 40 is formed by plating or evaporation.Not limiting described vapour deposition method, can be sputter (Sputtering), physical vapor vapour deposition method (PVD), chemical vapor coating method (CVD), plasma CVD (PECVD) etc.
The silicon layer formed can be formed on the whole surface of groove, also can be formed as porous silicon layer according to evaporation condition.
Then, as shown in Fig. 1 it (d), removed the organic matter layer or inorganic layer 30 that are formed on steel plate by clean-out system.Described clean-out system to make to be coated on the solvent that organism on electrical sheet or inorganics dissolve.
When removing described organic matter layer or inorganic layer 30, the silicon layer be formed in above organic matter layer or inorganic layer 30 is removed together, only above groove 20, is formed with silicon layer 40
When the oriented electrical steel as above manufactured is when forming the electrical sheet before primary recrystallization, carry out decarburizing annealing and form primary recrystallization to make steel plate, and carry out final annealing after applying annealing separating agent.
When the oriented electrical steel as above manufactured is when forming the electrical sheet after primary recrystallization, after coating annealing separating agent, carry out final annealing.
In an embodiment of the present invention, the method being formed groove by laser radiation is described, but also can forms groove by known etching method, roll-in method.
Below, described the present invention by embodiment.
But the following example is example of the present invention, and content of the present invention is not limited to the following example.
[embodiment]
Hot rolling is carried out after slab being reheated to 1150 DEG C, thus manufacture hot-rolled steel sheet, comprise C:0.0030%, Si:3.0%, S:0.001%, Al:0.05%, N:0.0013%, Mn:0.2% in % by weight in described slab, surplus is Fe and other inevitable impurity.This hot-rolled steel sheet is batched rear cooling, and carries out cold rolling after pickling, thus manufacture cold-rolled steel sheet.
Its thickness of so cold rolling steel plate is 0.23mm, forms the organic matter layer be made up of novolac resin, two triazo-compound compounds and volatile organic solvent at so cold rolling surface of steel plate.Irradiate continuous wave laser to the surface of steel plate being so coated with organic matter layer and form groove.
Now, the sweep trace of continuous wave laser is as shown in Figure 2 with being divided into the line of 3 ~ 8 sections to represent.
And, laser energy density E
dfor 1.5J/mm
2, P/S
1/2value is 10.2Wmm
1/2/ s
1/2, and formation and rolling direction are the groove of 85 °.
As mentioned above, when irradiating laser, the top organic matter layer forming groove place is removed.
Under the state that the organic matter layer of described trench portions is removed, use Si is the high purity target of 99.9%, plates silicon layer by sputtering method.The silicon layer of evaporation is 10 μm.
As mentioned above, under the groove inner face state that evaporation has silicon layer equably, organic matter layer on the surface remaining in cold-rolled steel sheet is utilized the aqueous solution removing comprising alkaline hydrated oxide, ammonium hydroxide.
After above-mentioned technique, decarburizing annealing is carried out to electrical sheet and carries out final annealing.The frequency domain of oriented electrical steel between 50 ~ 300Hz of manufacture like this can obtain the iron loss improvement rate of more than 10%.
With reference to accompanying drawing, embodiments of the invention are described above, but those skilled in the art is appreciated that, when not changing technological thought or essential feature, the present invention can otherwise implement.
Therefore, above-described embodiment is exemplary and nonrestrictive.Protection scope of the present invention should be as the criterion with claims but not above-mentioned explanation, and all changes of being derived by the implication of claims, scope and such equivalents or the form of change, all drop on protection scope of the present invention.
Claims (15)
1. a manufacture method for oriented electrical steel, comprises the following steps:
Steel plate after rolling is provided;
At surface-coated organic matter layer or the inorganic layer of described steel plate;
Groove is formed at the surface of steel plate being coated with described organic matter layer or inorganic layer;
Form silicon layer in the trench;
Remove described organic matter layer or inorganic layer.
2. the manufacture method of oriented electrical steel according to claim 1, wherein,
Groove is formed by laser radiation in the step of described formation groove,
The energy density E of described laser
dand the ratio (P/S of Laser output P and sweep trace speed S
1/2) meet the following conditions,
0.5J/mm
2≤E
d≤5.0J/mm
2，
5.0W·mm
1/2/s
1/2≤P/S
1/2≤13.0W·mm
1/2/s
1/2。
3. the manufacture method of oriented electrical steel according to claim 2, wherein,
The energy density E of described irradiated laser
dmeet the following conditions,
0.5J/mm
2≤E
d≤5.0J/mm
2。
4. the manufacture method of oriented electrical steel according to claim 3, wherein,
The output P of described irradiated laser meets the following conditions,
P≥500W。
5. the manufacture method of oriented electrical steel according to claim 4, wherein,
Light velocity length dt on the direction of illumination of the described laser irradiated in the step of described formation groove and the light velocity width L in rolling direction meets the following conditions,
0.20≤L/dt≤1.0
dt≤100μm。
6. the manufacture method of oriented electrical steel according to claim 5, wherein,
The gash depth formed in the step of described formation groove is 5% ~ 10% of steel plate thickness.
7. the manufacture method of oriented electrical steel according to claim 6, wherein,
At the described laser that the step of described formation groove is irradiated, it irradiates with oblique line relative to the rolling direction of electrical sheet.
8. the manufacture method of oriented electrical steel according to claim 7, wherein,
Described laser is 82 ~ 98 ° relative to the rolling direction of electrical sheet with the angle that oblique line irradiates.
9. the manufacture method of oriented electrical steel according to claim 8, wherein,
The translational speed of electrical sheet is more than 0.5m/s.
10. the manufacture method of oriented electrical steel according to claim 9, wherein,
Described groove forms 3 to 8 intermittently along the width of described electrical sheet.
The manufacture method of 11. oriented electrical steels according to claim 10, wherein,
Described laser is continuous wave laser.
12. 1 kinds make magnetic domain refinement to improve the oriented electrical steel of iron loss, and it is formed with groove on the surface, and described groove is formed with silicon layer.
13. oriented electrical steels according to claim 12, wherein,
The gash depth of described electrical sheet is 5% ~ 10% of steel plate thickness.
14. oriented electrical steels according to claim 13, wherein,
Described groove is formed as oblique line relative to the rolling direction of electrical sheet.
15. oriented electrical steels according to claim 14, wherein,
Described oblique line is 82 ~ 98 ° relative to the rolling direction of steel plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2013-0161374 | 2013-12-23 | ||
| KR1020130161374A KR101565509B1 (en) | 2013-12-23 | 2013-12-23 | Grain-oriented electrical steel sheet and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104726671A true CN104726671A (en) | 2015-06-24 |
| CN104726671B CN104726671B (en) | 2017-04-12 |
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| CN201410806323.XA Active CN104726671B (en) | 2013-12-23 | 2014-12-22 | Oriented electrical steel sheet and method for manufacturing the same |
Country Status (2)
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|---|---|
| KR (1) | KR101565509B1 (en) |
| CN (1) | CN104726671B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105244135A (en) * | 2015-09-24 | 2016-01-13 | 国网智能电网研究院 | Electrical steel plate material and preparation method thereof |
| CN108431243A (en) * | 2015-12-18 | 2018-08-21 | Posco公司 | The manufacturing method of oriented electrical steel sheets annealing separation agent, oriented electrical steel sheets and oriented electrical steel sheets |
| CN110088308A (en) * | 2016-12-22 | 2019-08-02 | Posco公司 | Oriented electrical steel and its magnetic domain thinning method |
| JP2021509143A (en) * | 2017-12-26 | 2021-03-18 | ポスコＰｏｓｃｏ | Manufacturing method of grain-oriented electrical steel sheet |
| JP2021509145A (en) * | 2017-12-26 | 2021-03-18 | ポスコＰｏｓｃｏ | Manufacturing method of ultra-low iron loss directional electromagnetic steel sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101944899B1 (en) * | 2016-12-22 | 2019-02-01 | 주식회사 포스코 | Method for refining magnetic domains of grain oriented electrical steel sheet |
| CN108660303B (en) * | 2017-03-27 | 2020-03-27 | 宝山钢铁股份有限公司 | Stress-relief-annealing-resistant laser-scored oriented silicon steel and manufacturing method thereof |
-
2013
- 2013-12-23 KR KR1020130161374A patent/KR101565509B1/en active IP Right Grant
-
2014
- 2014-12-22 CN CN201410806323.XA patent/CN104726671B/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105244135B (en) * | 2015-09-24 | 2018-03-30 | 国网智能电网研究院 | A kind of electrical sheet sheet material and preparation method thereof |
| CN105244135A (en) * | 2015-09-24 | 2016-01-13 | 国网智能电网研究院 | Electrical steel plate material and preparation method thereof |
| US11505843B2 (en) | 2015-12-18 | 2022-11-22 | Posco | Annealing separator for oriented electrical steel sheet, oriented electrical steel sheet, and manufacturing method of oriented electrical steel sheet |
| CN108431243A (en) * | 2015-12-18 | 2018-08-21 | Posco公司 | The manufacturing method of oriented electrical steel sheets annealing separation agent, oriented electrical steel sheets and oriented electrical steel sheets |
| CN108431243B (en) * | 2015-12-18 | 2020-06-19 | Posco公司 | Annealing separating agent for directional electrical steel sheet, and method for producing directional electrical steel sheet |
| CN110088308A (en) * | 2016-12-22 | 2019-08-02 | Posco公司 | Oriented electrical steel and its magnetic domain thinning method |
| US11772199B2 (en) | 2016-12-22 | 2023-10-03 | Posco | Grain-oriented electrical steel sheet and magnetic domain refinement method therefor |
| CN110088308B (en) * | 2016-12-22 | 2022-03-04 | Posco公司 | Oriented electrical steel sheet and method for refining magnetic domain thereof |
| US11318562B2 (en) | 2016-12-22 | 2022-05-03 | Posco | Grain-oriented electrical steel sheet and magnetic domain refinement method therefor |
| JP2021509145A (en) * | 2017-12-26 | 2021-03-18 | ポスコＰｏｓｃｏ | Manufacturing method of ultra-low iron loss directional electromagnetic steel sheet |
| JP7073498B2 (en) | 2017-12-26 | 2022-05-23 | ポスコ | Manufacturing method of ultra-low iron loss directional electrical steel sheet |
| JP7308836B2 (en) | 2017-12-26 | 2023-07-14 | ポスコ カンパニー リミテッド | Manufacturing method of grain-oriented electrical steel sheet |
| JP2021509143A (en) * | 2017-12-26 | 2021-03-18 | ポスコＰｏｓｃｏ | Manufacturing method of grain-oriented electrical steel sheet |
| US11773490B2 (en) | 2017-12-26 | 2023-10-03 | Posco Co., Ltd | Method for producing oriented electrical steel sheet with ultra-low iron loss |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101565509B1 (en) | 2015-11-03 |
| CN104726671B (en) | 2017-04-12 |
| KR20150073549A (en) | 2015-07-01 |
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