CN104726672B - 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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- CN104726672B CN104726672B CN201410810541.0A CN201410810541A CN104726672B CN 104726672 B CN104726672 B CN 104726672B CN 201410810541 A CN201410810541 A CN 201410810541A CN 104726672 B CN104726672 B CN 104726672B
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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
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
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Abstract
An electrical steel sheet according to one embodiment of the present invention forms a coating layer comprising titanium carbide, titanium oxide, titanium nitride or mixture or compound thereof in a trench.
Description
Technical field
The present invention relates to a kind of oriented electrical steel and its manufacture method.
Background technology
Generally, whether according to keeping magnetic domain to refine improvement after stress relief annealing, magnetic domain thinning method is roughly divided into and faces
When magnetic domain refinement and permanent magnetic domain refine.
Interim magnetic domain thinning method is that a kind of shape farmland in 90 ° (Domain) refines magnetic domain, uses and reduces to greatest extent
The magnetic domain refinement technology of the magnetoelastic energy for applying local compressive stress on surface and producing by heat energy or mechanical energy.
The permanent magnetic domain thinning method of iron loss improvement can be also kept to be roughly divided into etching method, roller after destressing heat treatment
Platen press and laser method.In the laser method, especially irradiated by laser by the permanent magnetic domain thinning method of pulse laser
When by the evaporation (Vaporization) according to portion's material surface of steel plate formed groove, to guarantee the heat treatment of oriented electrical steel
Iron loss improvement rate afterwards.
However, by the magnetic domain thinning method of pulse laser due to by evaporating forming groove, therefore will not be formed molten
Change portion, is difficult to ensure that iron loss improvement rate before heat treatment (destressing heat treatment, SRA), and in the steel plate translational speed of high speed
It is difficult to form deep trench under (more than 0.1m/s), it is impossible to the iron loss improvement needed for showing.
The content of the invention
One embodiment of the invention provides a kind of oriented electrical steel.
Another embodiment of the present invention provides a kind of manufacture method of oriented electrical steel.
The oriented electrical steel of one embodiment of the invention, its surface are formed with groove, and the groove and are formed with painting
Layer, the coating include titanium carbide, titanium oxide, titanium nitride or these mixture or compound.
The gash depth d of the electric steel plate can be the 4～6% of steel plate thickness.
Trench length L of the electric steel plate can be 2d≤L≤10d, and wherein d represents gash depth.
The thickness of the coating can be 10～100nm.
The groove is formed as oblique line, rolling of the oblique line relative to steel plate relative to the rolling direction of electric steel plate
Direction can be in 82～98 °.
The electric steel plate can be the oriented electrical steel that oxide layer is not formed in beneath trenches.The electric steel plate can
Being the oriented electrical steel that recrystallization is not formed in beneath trenches.
In the electric steel plate and comprising titanium carbide, titanium oxide, titanium nitride or these mixture or chemical combination
The coating of thing can be formed above insulating barrier.
The manufacture method of the oriented electrical steel of one embodiment of the invention, comprises the following steps：Electrician after rolling is provided
Steel plate；Organic matter layer or inorganic layer are formed on the surface of the electric steel plate；To being formed with the organic matter layer or inorganic matters
The surface of steel plate irradiating laser of layer is forming groove；Formed comprising titanium carbide, titanium oxide, titanium nitride in the trench
Or the coating of these mixture or compound；Remove the organic matter layer or inorganic layer.
The output P of the laser irradiated in the step of the formation groove can meet following condition, P >=500W.
It is described form groove the step of in the laser that irradiated, the width of light beam in its rolling direction can for 0.15～
0.70mm。
Gash depth formed in the step of the formation groove can be the 4～6% of steel plate thickness.
It is described form groove the step of formed in trench length L can be 2d≤L≤10d, wherein d represents ditch groove depth
Degree.
The thickness of the coating comprising titanium carbide, titanium oxide, titanium nitride or these mixture or compound
Degree can be 10～100nm.
The laser irradiated in the step of the formation groove, which can relative to the rolling direction of electric steel plate
Irradiated with oblique line, the angle with oblique line irradiation can be 82～98 °.
Groove formed in the step of the formation groove, which can be the ditch that oxide layer is not formed in beneath trenches
Groove, and can be the groove that recrystallization is not formed in beneath trenches.
When the electric steel plate is the electric steel plate before primary recrystallization, can also comprise the following steps：To removing institute
State organic matter layer or inorganic layer electric steel plate carry out decarburizing annealing after, coating annealing separating agent simultaneously carries out final annealing.
Generally, in the manufacture of oriented electrical steel, by slab (slab) hot rolling → hot rolling manufactured by continuous casting process
The magnetic by laser is carried out after plate annealing → cold rolling → decarburizing annealing (primary recrystallization) → final annealing (secondary recrystallization)
Farmland refines, but in the present invention, can be carried out in any step before cold rolling rear decarburizing annealing or after decarburizing annealing
By the magnetic domain process for refining of the laser.
The oriented electrical steel of the present invention reduces heat affecting caused by laser to greatest extent when groove is formed, in groove
Lower section will not form recrystallization, therefore weaken the demagnetizing field of trench portions, such that it is able to suppress magnetic flux density to greatest extent
Deterioration.
And, reduce heat affecting caused by laser to greatest extent when forming groove, oxidation will not be formed in beneath trenches
Layer, therefore the deterioration of magnetic flux density can be suppressed to greatest extent.
Additionally, the groove is formed as oblique line relative to the rolling direction of steel plate, therefore subtract the demagnetizing field of trench portions
It is weak, such that it is able to suppress the deterioration of magnetic flux density to greatest extent.
In addition, compared with the groove that formed with by existing magnetic domain refinement technology of groove of the invention depth compared with
It is shallow, therefore the deterioration of magnetic flux density can be suppressed to greatest extent.
And, the oriented electrical steel of the present invention is formed with comprising titanium carbide, titanium oxide, titanium nitrogen above groove
The coating 40 of compound or these mixture or compound, therefore resistivity is high and iron loss improvement rate is excellent.
Furthermore, groove is formed by the laser beam of irradiation high speed, therefore can be with the high-speed mobile of more than 0.1m/s
Groove is formed on electric steel plate.
Description of the drawings
Fig. 1 is the ideograph of the manufacture method of the oriented electrical steel for showing one embodiment of the invention.
Fig. 2 is formed at the schematic diagram of the groove shape of surface of steel plate when being to electric steel plate surface irradiating laser.
Specific embodiment
Referring to the drawings and the following example for describing in detail, it is possible to be expressly understood advantages of the present invention, feature and
The method for realizing these advantages and feature.However, the present invention being capable of deformation implementation in a variety of different ways, it is not limited to following
Embodiment.The purpose for providing the following example is that the fully open present invention is so that those skilled in the art is in invention
Have one comprehensively to understand, protection scope of the present invention should be defined by claims.Identical accompanying drawing in description in the whole text
Labelling represents identical element.
Below, to one embodiment of the invention to make the electrician of groove (groove) is formed with magnetic domain refinement surface of steel plate
Steel plate is described.
The electric steel plate of one embodiment of the invention is formed with the trench comprising titanium carbide, titanium oxide, titanium nitrogen
The coating of compound or these mixture or compound.
The gash depth d of the electric steel plate can be the 4～6% of steel plate thickness.It is formed according to the present invention fluted to take
To electric steel plate, its groove ratio is shallow by the groove that prior art is formed at oriented electrical steel, therefore can be to greatest extent
Suppress the deterioration of magnetic flux density.
Gash depth d deficiency steel plate thickness 4% when, if formed groove after carry out heat treatment, iron loss will not be obtained
Improve, and during more than 6%, if high-tension coating is formed in groove, magnetic flux density can reduce on the contrary.
Additionally, trench length L of electric steel plate can be 2d≤L≤10d, wherein d represents gash depth.
When the length of the groove exceeds 10d, magnetic flux density may be deteriorated, and during the curtailment 2d of the groove,
Iron loss will not be improved.
In addition, thermal coefficient of expansion is formed in the groove of electric steel plate is different from the coating that mother metal is electric steel plate, use
The tension force of the rolling direction of steel plate is improved, such that it is able to improve iron loss improvement rate.The coating can include titanium carbide, titanyl
Thing, titanium nitride or these mixture or compound.
And, the thickness of the coating can be 10～100nm.
When the thickness of coating is less than 10nm, the effect for giving tension force will not be presented, and when exceeding 100nm, because tension force gives
It is excessive it is possible that camber of sheet phenomenon.
Additionally, the electric steel plate can be the oriented electrical steel that oxide layer is not formed in beneath trenches.To electrical sheet
During plate irradiating laser, because the impact of laser may form oxide layer in the lower section of groove.This oxide layer can cause magnetic flux close
The deterioration of degree.In the present invention, laser irradiation condition is controlled, in order to avoid form this oxide layer.
And, the electric steel plate can be the oriented electrical steel that recrystallized layer is not formed in beneath trenches.To electrician
During steel plate irradiating laser, because the impact of laser may form recrystallized layer in the lower section of groove.This recrystallized layer can cause
The deterioration of magnetic flux density.In the present invention, laser irradiation condition is entered
Row control, in order to avoid form this recrystallized layer.
Furthermore, rolling direction of the groove relative to steel plate is formed as into oblique line, weakens the demagnetizing field of trench portions, so as to
The deterioration of magnetic flux density can be suppressed to greatest extent.The oblique line can be in 82～98 ° relative to the rolling direction of steel plate.
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 electric steel plate of one embodiment of the invention, comprises the following steps：Steel plate 10 after rolling is provided；
The surface of the steel plate forms organic matter layer or inorganic layer 30；To the steel plate for being formed with the organic matter layer or inorganic layer 30
Surface irradiating laser is forming groove；In the trench formed comprising titanium carbide, titanium oxide, titanium nitride or these
Mixture or compound coating 40；Remove the organic matter layer or inorganic layer 30.
The process of manufacture oriented electrical steel is first steel billet of the heating comprising Si after carrying out hot rolling, then carry out it is cold rolling,
Decarburizing annealing and high annealing.In the manufacture method of the oriented electrical steel of one embodiment of the invention, can decarburizing annealing it
Any step front or afterwards carries out magnetic domain refinement.
As shown in Fig. 1 its (a), it is coated with the electric steel plate 10 before primary recrystallization or after primary recrystallization
Machine nitride layer or inorganic layer 30.The organic matter layer or inorganic layer 30 can have insulating properties.In addition, to the organic matter layer or
Inorganic layer does not have any restriction, as long as can be clear in the technique that subsequent technique removes organic matter layer or inorganic layer 30
The material that lotion is removed.
To being coated with the electric steel plate irradiating laser of the organic matter layer or inorganic layer 30 to form groove 20.
Shown in Fig. 1 its (b), basilar parts are irradiated by laser and are melted, one part resolidification and form groove 20.
Irradiate to be formed during groove 20 by laser, the laser beam shape being formed on surface of steel plate can be rectangle or
Oval (oval).
Width of light beam in the rolling direction of the laser can be 0.15～0.70mm.
When width of light beam in rolling direction is less than 0.15mm, the tension force based on tensile coating after forming groove, is cannot ensure
Effect.And, when the width of light beam in rolling direction exceeds 0.70mm, the heat affecting that laser irradiation is caused can increase, follow-up
Heat treatment and annealing process on recrystallize formation produce impact, consequently, it is possible to causing the deterioration of magnetic flux density.
Additionally, when the laser is irradiated, making basilar parts that (blowing) is blown down while fusing so that in groove
20 central part will not remain melting zone.
In addition, the output P of laser can meet P >=500W, so as not to beneath trenches formed because laser irradiates oxide layer and
Recrystallized layer.
And, the ratio (P/S of laser output P and scanning linear velocity S1/2) following condition can be met, in order to avoid formed oxide layer and
Recrystallized layer,
2.0W·mm1/2/s1/2≤P/S1/2≤10.0W·mm1/2/s1/2
When laser output P is less than 500W, it is difficult to form groove under high-speed scanning velocity, and may during irradiating laser
Cause surface oxidation and form recrystallized layer.
After forming groove 20, such as shown in Fig. 1 its (c), the titanium carbon is coated on fluted electric steel plate is formed
Thing, titanium oxide, titanium nitride or these mixture or compound.
Can be formed by being deposited with comprising more than one coating 40 in titanium carbide, titanium oxide, titanium nitride.
The evaporation coating method is not limited, can be sputter (Sputtering).
The coating for being formed is may be formed in the whole surface of groove, it is also possible to be formed as porous painting according to evaporation condition
Layer.
Then, shown in Fig. 1 its (d), the organic matter layer or inorganic layer 30 that are formed on steel plate are removed by abluent.Institute
It is the solvent that can make the Organic substance or inorganic matters dissolving being coated on electric steel plate to state abluent.
When removing the organic matter layer or inorganic layer 30, be formed in organic matter layer or inorganic layer 30 on titanium carbon
Thing, titanium oxide, titanium nitride etc. are removed together, are only formed with comprising titanium carbide, titanium oxide, titanium above groove 20
The coating 40 of nitride or these mixture or compound.
When oriented electrical steel manufactured as above is the electric steel plate before forming primary recrystallization, decarburizing annealing is carried out
So that steel plate forms primary recrystallization, and final annealing is carried out after coating annealing separating agent.
When oriented electrical steel manufactured as above is to form the electric steel plate after primary recrystallization, coating annealing isolation
Final annealing is carried out after agent.
The final annealing terminate after electric steel plate, in electric steel plate and titanium carbide, titanyl shown in such as Fig. 1 its (e)
Compound, the top of titanium nitride coating 40 are formed with insulating barrier 50.
In an embodiment of the present invention, it is described to the method to form groove is irradiated by laser, but it is also possible to logical
Cross known etching method, roll-in method and form groove.
Below, described the present invention by embodiment.
But, the following example is the example of the present invention, and present disclosure is not limited to the following example.
[embodiment]
Slab is heated to hot rolling is carried out after 1150 DEG C, so as to manufacture hot rolled steel plate, with weight percent in the slab
Than meter comprising C：0.0030%th, Si：3.0%th, S：0.001%th, Al：0.05%th, N：0.0013%th, Mn：0.2%, balance of Fe
And other inevitable impurity.After this hot rolled steel plate is batched cool down, and carry out after pickling it is cold rolling, so as to manufacture cold-rolled steel
Plate.
So cold rolling its thickness of steel plate is 0.23mm, so cold rolling surface of steel plate formed by novolac resin,
The organic matter layer of two azido compound class compounds and volatile organic solvent composition, its thickness are 1 μm.
Continuous wave laser is irradiated to the surface of steel plate for being so coated with organic matter layer and form groove.
Now, laser energy density EdFor 1.0J/mm2, and be scanned with 87 ° relative to rolling direction.And, this
When continuous wave laser scan line separately scan in the width direction, as shown in Figure 2.In addition, the gash depth for now being formed is 9.5
μm, trench length is 90 μm.
As shown in Fig. 2 the groove for now being formed is rendered as a plurality of strapping wires with 87 ° relative to the rolling direction of steel plate.
As described above, when irradiating laser, forming the top organic matter layer at groove and being removed.In the trench portions
In the state of organic matter layer is removed, TiC is plated by sputtering method.The TiC layer of evaporation is 30nm.
As described above, in the state of groove inner face has equably been deposited with TiC layer, having in surface of cold-rolled steel plate will be remained in
Machine nitride layer is removed using the aqueous solution comprising alkaline hydrated oxide, ammonium hydroxide.
The oriented electrical steel of so manufacture can obtain more than 12% iron loss improvement rate.
Embodiments of the invention are described above by reference to accompanying drawing, but those skilled in the art is appreciated that
In the case where technological thought or essential feature is not changed, the present invention otherwise can be implemented.
Therefore, above-described embodiment is exemplary and nonrestrictive.Protection scope of the present invention should be with claim
Book is defined rather than described above, the shape for having altered or changing derived from the implication, scope and such equivalents by claims
Formula, all falls within protection scope of the present invention.
Claims (16)
1. a kind of oriented electrical steel, is formed with groove, and is only formed with comprising titanium carbon on the groove on its surface
Thing, titanium oxide, the coating of titanium nitride or these mixture or compound.
2. oriented electrical steel according to claim 1, its gash depth d for steel plate thickness 4～6%.
3. oriented electrical steel according to claim 2, its trench length L is 2d≤L≤10d, and wherein d represents ditch groove depth
Degree.
4. oriented electrical steel according to claim 3, wherein,
The thickness of the coating is 10～100nm.
5. oriented electrical steel according to claim 4, wherein,
The groove is formed as oblique line relative to the rolling direction of electric steel plate.
6. oriented electrical steel according to claim 5, wherein,
The oblique line is in 82～98 ° relative to the rolling direction of steel plate.
7. oriented electrical steel according to claim 6, wherein,
Insulating barrier is formed with above the coating.
8. a kind of manufacture method of oriented electrical steel, comprises the following steps：
Electric steel plate after rolling is provided；
Organic matter layer or inorganic layer are formed on the surface of the electric steel plate；
Groove is formed in the surface of steel plate for being formed with the organic matter layer or inorganic layer；
Formed comprising titanium carbide, titanium oxide, titanium nitride or these mixture or compound in the trench
Coating；And
Remove the organic matter layer or inorganic layer.
9. the manufacture method of oriented electrical steel according to claim 8, wherein,
The step of the formation groove irradiate to form groove by laser,
The output P of the laser irradiated in the step of the formation groove meets following condition,
P≥500W。
10. the manufacture method of oriented electrical steel according to claim 9, wherein,
Ratio (the P/S of the output P and scanning linear velocity S of the laser irradiated in the step of the formation groove1/2) meet following
Condition,
2.0W·mm1/2/s1/2≤P/S1/2≤10.0W·mm1/2/s1/2。
The manufacture method of 11. oriented electrical steels according to claim 10, wherein,
The laser irradiated in the step of the formation groove, the width of light beam in its rolling direction is 0.15～0.70mm.
The manufacture method of 12. oriented electrical steels according to claim 11, wherein,
Gash depth formed in the step of the formation groove is steel plate thickness 4～6%.
The manufacture method of 13. oriented electrical steels according to claim 12, wherein,
It is described form groove the step of formed in trench length L be 2d≤L≤10d, wherein d represents gash depth.
The manufacture method of 14. oriented electrical steels according to claim 13, wherein,
The thickness of the coating is 10～100nm.
The manufacture method of 15. oriented electrical steels according to claim 14, wherein,
The laser irradiated in the step of the formation groove is irradiated with oblique line relative to the rolling direction of electric steel plate.
The manufacture method of 16. oriented electrical steels according to claim 15, wherein,
The laser relative to electric steel plate the angle irradiated with oblique line of rolling direction as 82～98 °.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020130163186A KR101538778B1 (en) | 2013-12-24 | 2013-12-24 | Grain-oriented electrical steel sheet and method for manufacturing the same |
| KR10-2013-0163186 | 2013-12-24 |
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| KR101710984B1 (en) * | 2015-08-28 | 2017-03-02 | 주식회사 비에스피 | Manufacturing method of magnetic shielding sheet |
| KR101892226B1 (en) * | 2016-12-23 | 2018-08-27 | 주식회사 포스코 | Grain oriented electrical steel sheet and method for refining magnetic domains therein |
| KR102133909B1 (en) * | 2018-12-19 | 2020-07-14 | 주식회사 포스코 | Grain oriented electrical steel sheet and method for manufacturing the same |
| KR102133910B1 (en) * | 2018-12-19 | 2020-07-14 | 주식회사 포스코 | Grain oriented electrical steel sheet and method for manufacturing the same |
| JP6977814B2 (en) * | 2020-05-15 | 2021-12-08 | Ｊｆｅスチール株式会社 | Method for forming linear grooves and method for manufacturing grain-oriented electrical steel sheets |
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| CN1254020A (en) * | 1998-10-06 | 2000-05-24 | 新日本制铁株式会社 | Orientation silicon-iron sheet with excellent magnetic property and its production method |
| CN1464914A (en) * | 2001-05-29 | 2003-12-31 | 川崎制铁株式会社 | Unidirectional silicon steel sheet of ultra low iron loss and method for production thereof |
| EP1227163B1 (en) * | 2001-01-29 | 2008-07-16 | JFE Steel Corporation | Grain oriented electrical steel sheet with low iron loss and production method for same |
| CN102834529A (en) * | 2010-04-01 | 2012-12-19 | 新日本制铁株式会社 | Directional electromagnetic steel plate and method for manufacturing same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101141283B1 (en) * | 2009-12-04 | 2012-05-04 | 주식회사 포스코 | Grain-oriented electrical steel sheet having low core loss and high magnetic flux density |
| CN104284994B (en) * | 2012-04-26 | 2017-03-01 | 杰富意钢铁株式会社 | Orientation electromagnetic steel plate and its manufacture method |
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- 2013-12-24 KR KR1020130163186A patent/KR101538778B1/en active IP Right Grant
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Patent Citations (4)
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| CN1254020A (en) * | 1998-10-06 | 2000-05-24 | 新日本制铁株式会社 | Orientation silicon-iron sheet with excellent magnetic property and its production method |
| EP1227163B1 (en) * | 2001-01-29 | 2008-07-16 | JFE Steel Corporation | Grain oriented electrical steel sheet with low iron loss and production method for same |
| CN1464914A (en) * | 2001-05-29 | 2003-12-31 | 川崎制铁株式会社 | Unidirectional silicon steel sheet of ultra low iron loss and method for production thereof |
| CN102834529A (en) * | 2010-04-01 | 2012-12-19 | 新日本制铁株式会社 | Directional electromagnetic steel plate and method for manufacturing same |
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| KR20150074932A (en) | 2015-07-02 |
| KR101538778B1 (en) | 2015-07-22 |
| CN104726672A (en) | 2015-06-24 |
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