WO2016076471A1 - 방향성 전기강판용 절연피막 조성물, 이를 이용하여 표면에 절연피막이 형성된 방향성 전기강판 및 이의 제조방법 - Google Patents
방향성 전기강판용 절연피막 조성물, 이를 이용하여 표면에 절연피막이 형성된 방향성 전기강판 및 이의 제조방법 Download PDFInfo
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- WO2016076471A1 WO2016076471A1 PCT/KR2014/011839 KR2014011839W WO2016076471A1 WO 2016076471 A1 WO2016076471 A1 WO 2016076471A1 KR 2014011839 W KR2014011839 W KR 2014011839W WO 2016076471 A1 WO2016076471 A1 WO 2016076471A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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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- 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
- C21D8/1222—Hot rolling
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- 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
- C21D8/1233—Cold rolling
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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
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
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- C—CHEMISTRY; METALLURGY
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- 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
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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
- 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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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
Definitions
- Insulating coating composition for oriented electrical steel sheet oriented electrical steel sheet having an insulating coating formed on the surface using the same and a method of manufacturing the same
- the present invention relates to an insulating coating composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet having an insulating coating formed on the surface thereof, and a method of manufacturing the same.
- a grain-oriented electrical steel sheet contains about 3.1% of Si component in a steel sheet and has an aggregate structure in which the grain orientation is aligned in the direction of 100 ⁇ ⁇ 001>, and thus has very excellent magnetic properties in the rolling direction.
- Si component in a steel sheet
- aggregate structure in which the grain orientation is aligned in the direction of 100 ⁇ ⁇ 001>, and thus has very excellent magnetic properties in the rolling direction.
- the grain-oriented electrical steel sheet suppresses the growth of primary recrystallized grains, and exhibits excellent magnetic properties by the secondary recrystallized structure obtained by selectively growing grains of ⁇ 100 ⁇ ⁇ 001> orientation among the grains whose growth is suppressed. As I do it,
- Growth inhibitors of primary recrystallized grains are more important.
- it is a grain-oriented electrical steel sheet that allows the grains having the aggregate structure of ⁇ 100 ⁇ ⁇ 001> orientation to preferentially grow among the grains whose growth is suppressed.
- growth inhibitors of primary grains that can satisfy the above mentioned conditions and are currently widely used industrially include MnS, A1N, and MnSe. Specifically, MnS, AIN, MnSe and the like contained in the steel slab are reheated for a long time at high temperature to be dissolved and hot rolled, and the components having an appropriate size and distribution in the subsequent cooling process are used as the growth inhibitor as the precipitate. It can be.
- the insulating film is basically high electrical insulation, excellent adhesion to the material, uniform appearance without defects It must have one color.
- the magnetostrictive phenomenon due to the recent strengthening of international standards on transformer noise and intensifying competition in related industries, it is necessary to study the magnetostrictive phenomenon in order to reduce the noise of insulating film of directional electrical steel sheet.
- the shaking phenomenon is repeated by contracting and expanding, and the shaking causes vibration and noise in the transformer.
- An insulating film is formed on the forstedte base film.
- the wet coating method is known as a method of reducing the 90 ° domain of the grain-oriented electrical steel sheet.
- the 90 ° magnetic domain refers to a region having magnetization that is perpendicular to the magnetic field application direction, and the smaller the amount of such 90 ° magnetic domain, the smaller the magnetic strain.
- the general wet coating method lacks the noise improvement effect due to the tensile force applied, there is a disadvantage that the coating thickness is coated with a thick film, there is a problem that the transformer spot ratio and efficiency worsens.
- PVD Physical Vapor Deposition
- chemical vapor are applied to give high tensile properties to the surface of oriented electrical steel sheets.
- the present inventors improve the problems of the above-mentioned magnetic properties and magnetic deformation by annealing a grain-oriented electrical steel sheet containing boron (B) or barn (V) alone or including all of them at high temperature. I would like to.
- the insulating film composition for a grain-oriented electrical steel sheet including hollow nanoparticles and mesoporous nanoparticles, it is intended to further improve the problem of the above-described magnetic deformation.
- 0.1 to 7% by weight of the hollow nanoparticles 0.1 to 5% by weight 0 /.
- Ceramic nanofibers 0.1 to 5% by weight of mesoporous (Mesoporous) nano It is possible to provide an insulating coating composition for a grain-oriented electrical steel sheet comprising particles, 30 to 6 wt% colloidal silica nanoparticles, and 30 to 60 wt% metal phosphate.
- 0.1 to 7% by weight hollow nanoparticles Of 0.1 to 5 parts by weight 0/0 ceramic nanofibers (Nano fiber); Mesoporous (Mesoporous) nano-particles of 0.1 to 5 parts by weight 0/0; Colloidal silica nanoparticles of 30 to 60 weight 0/0; And 30 to 60 parts by weight of phosphate 0 /; provides the, grain-oriented electrical steel sheet insulating coating composition comprising.
- the description of the hollow nanoparticles is as follows.
- the hollow nanoparticles include Si0 2 , Ti0 2 , A1 2 0 3 , and MgO It may be composed of at least one oxide selected from the group.
- the particle diameter of the hollow nanoparticles may be 50 to 300 nm.
- the inner diameter of the hollow nanoparticles may be 30 to 280 ⁇ .
- the description of the ceramic nanofiber is as follows.
- the ceramic nanofiber may be made of at least one oxide selected from the group consisting of Ti0 2 , Si0 2 , Al 2 0 3 , Zr0 2 , MgO, and 1 0 5 0 12 .
- the ceramic nanofibers may have a diameter of 5 to 100 nm.
- the mesoporous nanoparticles may be composed of at least one oxide selected from the group comprising Si0 2 , Al 2 O 3 , MgO, and Ti0 2 .
- the mesoporous nanoparticles may have a particle diameter of 1 to 800 nm.
- Porosity of the mesoporous nanoparticles may be included a pore volume of from 7 to 35 0/0 relative to the mesoporous nanoparticles.
- the mesoporous nanoparticles may be in the form of any one or more selected from the group including spherical, plate-shaped, and needle-shaped.
- the metal phosphate may be composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ).
- the metal phosphate is composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ), and the metal hydroxide is Sr (OH) 2 , Al (OH) 3 , Mg (OH) 2 , Zn ( OH) 2 , Fe (OH) 3 , and Ca (OH) 2 It may be at least one selected from the group containing.
- the compound consists of a compound by a chemical reaction of the metal hydroxide and phosphoric acid (H 3 P0 4 ), the metal atom of the metal hydroxide is phosphorus and
- Substitution may be made by forming a single bond, a double bond, or a triple bond, and may be composed of a compound having an amount of unbanung free phosphoric acid (3 ⁇ 4PO 4 ) of 30% or less.
- the metal phosphate is composed of a compound by a chemical reaction of a metal hydroxide and phosphoric acid (H 3 P0 4 ), the weight ratio of the metal hydroxide to the phosphoric acid may be represented by 1: 100 to 30: 100. .
- the insulating film includes, the insulating film, 0.1 to 7% by weight hollow nanoparticles; Ceramic nanofibers from 0.1 to 5 increments 0 / .; 0.1 to 5 increments of 0 /.
- Mesoporous nanoparticles Colloidal silica nanoparticles of 30 to 60 increased 0/0; And 30 to 60% by weight of phosphate; it comprises, a grain-oriented electrical steel sheet formed with an insulating coating on the surface.
- the film tension (A, MPA) of the grain-oriented electrical steel sheet having an insulating film formed on the surface as a ratio to the weight (B, g / m 2 ) of the insulating film per one area of the grain-oriented electrical steel sheet, 0.20 ⁇ 8 ⁇ 2.50 (2 ⁇ 8 ⁇ 5), specifically, 0.63 ⁇ A / B ⁇ 1.17 (2 ⁇ B ⁇ 5).
- the hollow nanoparticles include Si0 2 , Ti0 2 , A1 2 0 3 , and MgO
- It may be composed of at least one oxide selected from the group.
- the particle diameter of the hollow nanoparticles may be 50 to 300 nm.
- the inner diameter of the hollow nanoparticles may be 30 to 280 nm.
- the diameter of the ceramic nanofiber may be 5 to 100 nm.
- the mesoporous nanoparticles may be composed of at least one oxide selected from the group consisting of Si0 2 , Al 2 O 3 , MgO, and Ti0 2 .
- the mesoporous nanoparticles may have a particle diameter of 1 to 800 nm.
- the metal phosphate may be composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ).
- the metal hydroxide and phosphoric acid (H 3 P0 4 ) of the compound by the chemical reaction of the reaction the metal atom of the metal hydroxide is phosphorus and
- It is formed by forming a single bond, a double bond, or a triple bond by substitution reaction, and may be composed of a compound having an amount of unreacted free phosphoric acid (H 3 P0 4 ) of 30% or less.
- mesoporous (mesoporous) metal phosphate nanoparticles 30 to 60 parts by weight 0/0 of the colloidal silica nanoparticles, and 30 to 60 parts by weight 0 /. It provides a method for producing a grain-oriented electrical steel sheet having an insulating coating on its surface.
- the average grain size of the prepared grain-oriented electrical steel sheet the size may be 15 to 35 kPa.
- boron (B), vanadium (V), or it comprises one selected from a combination of one of a 0.005 to 0.05 parts by weight 0 / elements, silicon (Si) and: 2.6 to 4.3 increased 0/0, and aluminum (A1) : 0.01 to 0.20 comprising a weight 0/0, and the balance Fe and other portions will be the, grain-oriented electrical steel sheet consisting of unavoidable impurities: 0.020 to 0.040 wt. 0/0, manganese (Mn)
- Preparing the preparing of the steel slab; Hot rolling the steel slab to produce hot rolled sheet; Cold rolling the hot rolled sheet to produce a cold rolled sheet; Decarburizing annealing the malleable lead plate to obtain a decarburizing annealing steel sheet; And applying an annealing separator to the decarburized annealing steel sheet, and finally annealing.
- nanofiber hollow nanoparticles, ceramic nanofibers (Nanofiber),
- the mesoporous nanoparticles, a pore forming agent and a mesoporous nanoparticle precursor is added to the ethanol solvent, the step of mixing; in the mixed solution Adding ammonia water to adjust the pH to 10-12; Heating the pH adjusted solution; And obtaining nanoparticles having nano-sized pores formed therein.
- the pore former is at least one member selected from the group consisting of poly (methylmethacrylate), polystyrene (polystyrene), polyethylene oxide (poly (ethylene oxide) and polypropylene oxide). It may be.
- the mesoporous nanoparticle precursor is the mesoporous nanoparticle precursor
- Tetraethylorthosilicate (tetraethly orthosilicate)
- It may be at least one selected from the group consisting of aluminum trialkoxide (aluminum tri alkoxide), magnesium alkoxide (magnesium alkoxide), and titanium tetraalkoxide (titanium tetraalkoxide).
- aluminum trialkoxide aluminum tri alkoxide
- magnesium alkoxide magnesium alkoxide
- titanium tetraalkoxide titanium tetraalkoxide
- the step of heating the pH-adjusted solution is, by heating to a temperature range of 50 to 70 ° C, may be performed for 4 to 6 hours.
- the metal phosphate preparing a metal hydroxide aqueous solution; Adding phosphoric acid to the prepared metal hydroxide aqueous solution, followed by mixing; Stirring the mixed solution; And obtaining a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ).
- the step of heat-treating the grain-oriented electrical steel sheet coated with the grain-oriented electrical steel coating composition may be performed in a temperature range of 250 to 950 ° C.
- Heat-treating the grain-oriented electrical steel sheet coated with the grain-oriented electrical steel coating composition may be performed for 30 seconds to 70 seconds.
- an insulating coating composition for a grain-oriented electrical steel sheet excellent in reducing noise due to magnetostriction.
- the insulating film having a surface having the above characteristics It is possible to provide the formed grain-oriented electrical steel sheet.
- Fig. 1 is a result of a comparison of the noise characteristics of 1500kVA transformer according to the invention of the present invention example and comparative example.
- 0.1 to 7% by weight hollow nanoparticles 0.1-5 weight 0 /.
- Mesoporous nanoparticles Colloidal silica nanoparticles of 30 to 60 weight 0/0; And 30 to 60 parts by weight of a metal phosphate, 0/0; provides, grain-oriented electrical steel sheet insulating coating composition comprising a.
- the composition by including hollow nanoparticles 1) in the case of the conventional wet coating method, the lack of noise improvement effect by the tensile stress applied, the transformer spot ratio and efficiency due to the thick film coating is poor, 2) Commercial production according to the conventional vacuum deposition coating method can solve all the difficulties and the insulation properties are deteriorated.
- the hollow nanoparticles refer to nanoparticles having a hollow interior and a shell surrounding such empty spaces.
- a shell is formed on the surface.
- nanoparticles present inside the shell By removal.
- the hollow nanoparticles have a large empty space therein as described above, when the magnetostriction occurs, it is possible to convert vibration energy into heat-energy to suppress vibration amplification, which is effective in improving transformer noise. to be.
- it is an inorganic oxide is excellent in heat resistance, suitable for transformer production, there is an advantage that the mass production is easy.
- the vaporized nanoparticles it is possible to solve the problem of noise generation and coating compatibility caused by magnetic deformation at the same time.
- mesoporous (Mesoporous) nanoparticles refers to the nanoparticles in the form of nano-pores are distributed on the surface.
- nanoporous materials generally have a microporous (if pore size of 2 or less), mesoporous (for pore size of 2 to 50 nra), and macroporous (more than 50 nm) depending on the pore size. Pore size).
- the mesoporous nanoparticles form a nanoparticle by mixing a material such as a polymer, and then removing only the carbon component in the nanoparticle by heat treatment, thereby forming nano ( nano pores
- the hollow nanoparticles and mesoporous nanoparticles are chemically bonded to each other, the size of the particles may be non-uniform, and when lumped into agglomerate, there is a possibility of causing surface defects and poor film adhesion appearing as a mottled There may be.
- the metal phosphate it is possible to prevent side effects that may be caused.
- the colloidal nano silica has a large specific surface area and excellent chemical reaction properties. It is excellent in compatibility with other additives, and it is possible to obtain a product having a beautiful surface and excellent surface roughness in the heat treatment process after coating.
- the hollow nanoparticles include Si0 2 , Ti0 2 , A1 2 0 3 , and MgO
- It may be composed of at least one oxide selected from the group.
- the hollow nanoparticles may have a particle diameter of 50 to 300 rati. If the particle size of the hollow nanoparticles is less than 50 nm, the specific surface area is increased, and the stability of the composition is unsuitable for mass production, and if it is more than 300 nm, the surface roughness may be roughened, resulting in surface defects. It is limited to a range.
- the inner diameter of the hollow nanoparticles may be 30 to 280 nm.
- the inner diameter of the hollow nanoparticles is less than 30 nm, there is a problem that the vibration damping function due to magnetostriction is reduced.
- the hollow nanoparticles may be easily broken when processing the same by applying to the grain-oriented electrical steel sheet, it is limited to the above range.
- the description of the ceramic nanofiber is as follows.
- the ceramic nanofibers, kk ⁇ 2, ⁇ 2, 2 3 0, 3 ⁇ 40 may be made of at least one kind of oxide selected from the second, ⁇ 0, and a group including 50 12: 1.
- the ceramic nanofibers may have a diameter of 5 to 100 nm.
- the diameter of the ceramic nanofibers is less than 5 nm, there is a problem that the tension imparting ability of the insulating film formed by the composition is poor, and when the diameter of the ceramic nanofiber is greater than 100 nm, uniform dispersion in the composition may be difficult. It is limited to a range.
- the mesoporous nanoparticles may be composed of at least one oxide selected from the group comprising Si0 2 , A1 2 0 3 , MgO, and Ti0 2 .
- the mesoporous nanoparticles may have a particle diameter of 1 to 800 nm.
- the manufacturing cost increases rapidly, which is not suitable for mass production, and when it exceeds 800 nm, the surface roughness becomes rough. Since the problem that the transformer spot ratio is lowered may occur, it is limited to the above range.
- the porosity of the mesoporous nanoparticles may be a pore of 7 to 35 volume 0 / ° with respect to the mesoporous nanoparticles.
- the mesoporous nanoparticles may be in the form of any one or more selected from the group consisting of spherical, plate-shaped, and needle-shaped.
- the metal phosphate may be formed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ).
- the metal phosphate is composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ), and the metal hydroxide is Sr (OH) 2 , Al (OH) 3 , Mg (OH) 2 , Zn ( OH) 2 , Fe (OH) 3 , and Ca (OH) 2 may be at least one or more selected from the group containing.
- the metal atom of the metal hydroxide is substituted with phosphorus of phosphoric acid
- It is made by reacting to form a single bond, double bond, or triple bond, and may be composed of a compound having an amount of unbanung free phosphoric acid (H 3 P0 4 ) of 30% or less.
- the metal phosphate is composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ), and the weight ratio of the metal hydroxide to the phosphoric acid may be represented by 1: 100 to 30: 100. .
- the metal hydroxide is included in excess of the weight ratio of 30: 100, the chemical reaction may not be completed, resulting in a problem of sedimentation. If the metal hydroxide is included in the weight ratio of less than 1: 100, corrosion resistance may be caused. Since this problem may arise, the range is limited as described above.
- Mesoporous nanoparticles Colloidal silica nanoparticles of 30 to 60 weight 0/0; And 30 to 60 weight 0 /.
- Phosphate comprising, provides a grain-oriented electrical steel sheet formed with an insulating coating on the surface.
- composition of the grain-oriented electrical steel sheet in particular, by containing boron (B) or vanadium (V) alone, or both of them to provide excellent magnetic properties
- the insulating film corresponds to a grain-oriented electrical steel sheet having an insulating film formed on its surface, which can simultaneously solve the noise-inducing problem and the coating compatibility deterioration problem due to magnetic deformation.
- the present invention provides a more detailed description of a grain-oriented electrical steel sheet having an insulating coating formed on its surface, and the features and advantages of each component included in the insulating coating for the grain-oriented electrical steel sheet are omitted as described above. Let's do it.
- the boron (B) and the bar (V) are both grain boundary segregation elements and correspond to elements that hinder the movement of grain boundaries. These properties promote the formation of grains in the ⁇ 1 10 ⁇ ⁇ 001> orientation as growth inhibitors for grains and induce secondary recrystallization to develop, so that these elements play an important role in controlling grain size. can do.
- the silicon (Si) serves to reduce the iron loss by increasing the specific resistance of the steel sheet, when the content is less than 2.6% by weight, the specific resistance of the steel is small, the iron loss If the characteristics are not only to be deteriorated during high-temperature annealing phase change section is present, and the problem that the secondary recrystallization is unstable, weight 4.3 0/0 exceeded, the cold rolling is difficult increased brittleness. This is the reason for limiting a range as mentioned above.
- Aluminum (A1) 0.020 to 0.040 Weight 0 /.
- the aluminum (Al) is finally AIN, (Al, Si) N, (Al, Si, Mn) a component which can function in the nitride inhibitors of the N type, the content is excessively less than 0.020 parts by weight 0/0 less In this case, the effect of the above-described inhibitors cannot be expected, and in the case of more than 0.040% by weight, the nitride precipitates and grows so coarsely that the effect as an inhibitor cannot be expected. This is the reason for limiting the range as described above.
- the manganese (Mn) is an element having a role similar to that of the silicon (Si), and has an effect of reducing the iron loss by increasing the specific resistance, and reacted with nitrogen together with the silicon (Si) (Al, Si, Mn) Formation of precipitates of N inhibits the growth of primary recrystallized grains and plays an important role in causing secondary recrystallization therefrom.
- the content of manganese (Mn) needs to be limited to 0.20 weight 0 /.
- the manganese (Mn) is an element forming austenite, increase the austenite fraction during hot rolling to increase the high capacity of the precipitates, to fine-precipitate the precipitate during re-precipitation, too much primary recrystallization through MnS formation There is an effect to prevent deterioration. Therefore, it is necessary to include an appropriate content of 0.01% by weight or more.
- the film of the grain-oriented electrical steel sheet with an insulating film formed on the surface Tension (A, MPA) is a ratio with respect to the weight (B, g / m 2 ) of the insulating film per one area of the grain-oriented electrical steel sheet, () .20 ⁇ A / B ⁇ 2.50 (2 ⁇ B ⁇ 5 ), Specifically, may be represented by 0.63 ⁇ A / B ⁇ 1.17 (2 ⁇ B ⁇ 5).
- the film tension represented by A is applied to the surface of the insulating electrical coating composition and dried to prepare a specimen, and after pressing the anti-corrosion coated paper on one side of the specimen, the sodium hydroxide and water
- the resulting elution solution was immersed in the elution solution at a temperature of 90 I: for 20 seconds to remove the insulating coating on one side of the specimen, and dried to the degree of whip of the specimen. It is measured according to the unit of MPa and when it meets the above range in relation to the increase (B, g / m 2 ) of the single-base insulating film per area of the grain-oriented electrical steel sheet, the noise, the dripping rate, and the insulating properties The optimal condition of can be derived. This effect is supported by the embodiments to be described later.
- the range of A / B is limited as described above.
- the hollow nanoparticles include Si0 2 , Ti0 2 , A1 2 0 3 , and MgO
- It may be composed of at least one oxide selected from the group.
- the particle size of the evaporated nanoparticles may be 50 to 300 nm.
- the inner diameter of the hollow nanoparticles may be 30 to 280 nm.
- the diameter of the ceramic nanofibers may be, 5 to 100 nm.
- the mesoporous nanoparticles may be composed of at least one oxide selected from the group comprising Si0 2 , Al 2 O 3 , MgO, and Ti0 2 .
- the mesoporous nanoparticles may have a particle diameter of 1 to 800 nm.
- the metal phosphate may be composed of a compound by chemical reaction of metal hydroxide and phosphoric acid (3 ⁇ 4PO 4 ).
- the metal phosphate, the metal atom of the metal hydroxide is phosphorus of phosphoric acid
- Substitution may be performed to form a single bond, a double bond, or a triple bond, and may be composed of a compound having an amount of unreacted free phosphoric acid (H 3 P 04) of 30% or less.
- manganese (Mn) includes 0.01 to 0.20 wt%, and the balance part comprising: preparing a phosphorus, grain-oriented electrical steel sheet will be made of Fe and other unavoidable impurities ; Mixing hollow nanoparticles, ceramic nanofibers (Nanofiber), mesoporous (Mesoporous) nanoparticles, colloidal silica nanoparticles, and metal phosphate, to prepare an insulating coating composition for a grain-oriented electrical steel sheet; Applying the composition to the surface of the grain-oriented electrical steel sheet; Heat-treating the grain-oriented electrical steel sheet coated with the insulation coating composition for grain-oriented electrical steel sheet; And obtaining a grain-oriented electrical steel sheet having an insulating coating formed on a surface thereof, wherein the insulation coating composition for grain-oriented electrical steel sheet comprises 0.1 to 7 weight 0 / .hollow nanoparticles and 0.1 to 5 weight 0 /.
- a fiber which comprises a fiber (Nanofiber), 0.1 to 5 parts by weight 0 /. of mesoporous (mesoporous) of nanoparticles, 30 to colloidal silica nanoparticles 60 increase%, and 30 to 60 parts by weight 0/0 metal phosphate, Provided is a method of manufacturing a grain-oriented electrical steel sheet having an insulating coating on its surface.
- the insulating coating composition for the grain-oriented electrical steel sheet the features and advantages of the insulating coating will be omitted as described above, and other details will be described.
- the average grain size of the prepared grain-oriented electrical steel sheet may be 15 to 35 kPa.
- the grain-oriented electrical steel sheet includes boron (B) or vanadium (V) alone or includes all of them, and the grain size of the grain-oriented electrical steel sheet is smaller than that of the conventionally commercialized grain-oriented electrical steel sheet. Excellent magnetic properties of the grain-oriented electrical steel sheet can be achieved.
- the grain size is less than 15 ⁇ , the magnetic flux density is inferior. This is because the product is not enough to produce. And, when the size of the average grain size is more than 35 GPa, the problem that the magnetostriction is rather severe occurs.
- any element or elements selected from boron (B), vanadium (V), or a combination thereof comprises 0.005 to 0.05 weight 0 /., Silicon (Si): 2.6 to 4.3 weight 0 /., Aluminum (Al ): 0.020 to 0.040 weight 0 /., Manganese (Mn): 0.01 to 0.20 weight./., The remainder of which prepares a steel slab composed of Fe and other unavoidable impurities.
- hot rolling the steel slab to produce a hot rolled sheet Cold rolling the thin-based hot rolled sheet to produce a cold rolled sheet; Decarburizing annealing the cold rolled plate to obtain a decarburizing annealing steel sheet; And applying an annealing separator to the decarburized annealing steel sheet, and finally annealing.
- the heating is first performed at 1200 ° C or lower.
- the hot rolled sheet produced after hot rolling can be annealed, and the nitriding treatment can be carried out after decarburization annealing or at the same time as decarburization annealing. do.
- the average grain size after the final annealing satisfies the range of 15 to 35 mm 3. It is desirable to control the process conditions so as to control the process conditions.
- the cold rolled steel slab was put into a furnace maintained at 800 to 900 ° C., and then the dew point temperature and the oxidizing capacity were adjusted, and decarburization was carried out in a mixed gas atmosphere of hydrogen, nitrogen, and ammonia. The next recrystallization annealing can be performed simultaneously.
- a slurry is prepared by mixing distilled water with an annealing separator containing MgO as a main component, and applying the slurry to the decarburized annealing steel slab using a roll or the like, followed by final annealing.
- the first cracking temperature at the final annealing was 600 to 800 ° C
- the second cracking temperature is 1 100 to 1300 ° C
- the speed of the temperature increase section may be 10 to 20 ° C / hr.
- up to the second cracking temperature of a combined gas of 25% by volume nitrogen and 75% by volume hydrogen After the atmosphere, and reaches the secondary soaking temperature is maintained in a hydrogen gas atmosphere of 100 vol. 0/0 15 hours may then furnace cooling (cooling fiirnace).
- the surface is coated with the insulation coating composition for grain-oriented electrical steel sheet.
- the mesoporous nanoparticles are mixed by adding a pore former and a mesoporous nanoparticle precursor to an ethanol solvent; In the mixed solution
- the pore former is at least one member selected from the group consisting of poly (methylmethacrylate), polystyrene (polystyrene), polyethylene oxide (poly (ethylene oxide) and polypropylene oxide). It may be.
- the mesoporous nanoparticle precursor is the mesoporous nanoparticle precursor
- Tetraethylorthosilicate (tetraethly orthosilicate)
- It may be at least one selected from the group consisting of magnesium alkoxide, and titanium tetraalkoxide.
- the step of heating the pH-controlled solution is, by heating to a temperature range of 50 to 70 ° C, may be performed for 4 to 6 hours.
- nanoparticles with nano-sized pores may be formed.
- metal phosphate preparing a metal hydroxide aqueous solution; Adding phosphoric acid to the prepared aqueous metal hydroxide solution and mixing the same; Stirring the mixed solution; And obtaining a compound by chemical reaction of metal hydroxide and phosphoric acid (H 3 P0 4 ).
- the grain-oriented electrical steel sheet coated with the grain-oriented electrical steel coating composition Heat treatment step may be performed at a temperature range of 250 to 950 ° C. If it exceeds 950 I: cracks may occur in the formed insulating film, and if it is less than 250 ° C, the formed insulating film may not be dried sufficiently, which may cause problems in corrosion resistance and weather resistance. It is limited.
- Heat-treating the grain-oriented electrical steel sheet coated with the grain-oriented electrical steel coating composition may be performed for 30 seconds to 70 seconds. If more than 70 seconds may cause a problem that the productivity is lowered, if less than 30 seconds may cause problems in the corrosion resistance and weather resistance, it limits the range as described above.
- silicon (Si) 3.2 weight 0 /.
- Aluminum (A1) 0.03% by weight
- the steel slab was heated at 1150 ° C. for 220 minutes and then hot rolled to a thickness of 2.3 mm to prepare a hot rolled sheet.
- the temperature was again maintained at 920 ° C. for 90 seconds, and then immersed in water and pickled, cold rolled to a thickness of 0.23 mm to prepare a > cold rolled sheet.
- the cold rolled sheet was placed in a furnace maintained at 860 ° C., followed by adjusting dew point temperature and oxidation capacity, and simultaneously performing decarburization and primary recrystallization annealing in a mixed gas atmosphere of hydrogen, nitrogen, and ammonia, Decarburized annealing steel sheet was prepared.
- distilled water was mixed with an annealing separator containing MgO as a main component to prepare a slurry, and the slurry was applied to the decarburized annealing steel sheet using a roll etc. After the final annealing.
- the primary cracking temperature was 700 ° C.
- the secondary cracking temperature was 1200 ° C.
- the rate of temperature increase was 15 ° C / hr.
- hydrogen 75 vol. 0 /. Of one were to heunhap gas atmosphere, after reaching the 1200 ° C is maintained in a hydrogen gas atmosphere of 100 vol. 0 /. 15 hours and then furnace cooling (furnace cooling).
- Nanoparticles and 51.3 weight% of aluminum phosphate and strontium phosphate 1: 1 mixed insulating coating composition was applied so that the coating amount (weight of the insulating coating per one area of the grain-oriented electrical steel sheet) was 3.3 g / m 2. , And heat-treated for 55 seconds at 870 ° C temperature conditions.
- Example 1 it was intended to evaluate the magnetic properties and noise characteristics according to the presence and absence of the additional element and its specific content.
- each of the grain-oriented electrical steel sheet according to Example 1 was prepared and represented by Inventive Examples 1 to 4, and the magnetic properties and the characteristic characteristics were evaluated for each, and the results are shown in Table 1.
- the electrical steel sheet was prepared, and the magnetic and noise characteristics were evaluated under the above conditions, and the results are also shown in Table 1 together.
- the magnetic properties of electrical steel are usually W17 / 50 and B8.
- W17 / 50 is the power loss that occurs when the magnetic field of frequency 5 () Hz is magnetized by alternating current up to 1.7Tesla.
- Tesla is a unit of magnetic flux density which means magnetic flux per unit area (fl ux ).
- B8 represents the magnetic flux density value flowing in the electrical steel sheet when a current amount of 800 A / m is applied to the winding wound around the electrical steel sheet.
- the general noise is obtained by acquiring sound pressure (air pressure) in the intersectoral area according to the international standard IEC 61672-1, converting it into frequency response data, and then responsiveness of the audible band (A-weighted decibels). Reflecting this, the noise in the audible band [dBA] is evaluated.
- the noise evaluation method selected in the embodiment of the present invention is evaluated in the same manner as the international standard IEC 61672-1, but instead of sound pressure, vibration (vibration) data of electrical steel is obtained and evaluated as a noise conversion value [dBA].
- the vibration of the electrical steel plate measures the vibration pattern with time by non-contact method using the laser Doppler method when the magnetic field of frequency 50Hz is magnetized by alternating current to l .TTesIa.
- the grain-oriented electrical steel sheet containing the additive element when the grain size is controlled in the above range after high temperature annealing, it can be seen that the magnetic characteristics and the noise characteristics are excellent.
- hollow nanoparticles are hollow silica nanoparticles
- ceramic nanofibers are alumina (A1 2 0 3 nanofibers
- mesoporous nanoparticles are mesoporous Porous silica
- aluminum phosphate and magnesium phosphate were mixed in a weight ratio of 1: 1 by metal phosphate
- colloidal silica nanoparticles were also prepared.
- each insulating film composition according to the invention examples A1 to A10 (the weight of the oriented electrical steel sheet and the insulating film per one area) was applied to 2.7 g / m 2 , and then heat-treated for 45 seconds at 920 ° C temperature conditions. . Thereby, each oriented electrical steel sheet with an insulating film was obtained.
- Example 2 we tried to evaluate the surface quality, insulation and noise characteristics according to the insulating film composition.
- the surface quality is 5%, 35 ° C, and it is evaluated if the specimen is rusted for 8 hours in NaCl solution. It is excellent when the rust area is less than 5%, and good when it is less than 20% : 20-50% Slightly poor, 50% In the above, it marked as bad.
- Insulation was measured on the top of the coating using a Franklin meter according to ASTM A717 International Standard.
- the noise characteristics are the same as in the test example for Example 1 above.
- the effect achieved by the insulating film composition further comprises mesoporous (Mesoporous) nanoparticles.
- mesoporous (Mesoporous) nanoparticles it is necessary to appropriately control the content of the substances. This is related to the role of the materials, according to the invention examples A1 to A10, 0.1 to 7% by weight of the hollow nanoparticles : 0.1 to 5% by weight of ceramic nanofibers (Nanofiber), 0.1 to 5% by weight %of
- mesoporous nanoparticles 30 to 60 weight percent colloidal silica nanoparticles, and 30 to 60 weight percent phosphate.
- Silicon (Si) (forming an insulating film of grain-oriented electrical steel sheet) containing 3.4% by weight, aluminum (A1): 0.04 increase 0/0, and manganese (Mn): to contain, and the additional element a 0.20 increase% 0.05 0 / 0 , 0.22 ⁇ thick directional with final annealing with primary coating
- each insulating film composition according to the invention examples B1 to B5 (the weight of the insulating film per one area of the grain-oriented electrical steel sheet) is applied to 2.0 g / m 2 , and then each heat treatment for 60 seconds at 870 ° C temperature conditions It was. Thereby, each oriented electrical steel sheet with an insulating film was obtained.
- Example 3 Noise, Drop Ratio, and Insulation Evaluation of Optimum Conditions
- Example 3 it was intended to evaluate the composition of the insulating film exhibiting noise, drop ratio, and insulation under optimum conditions.
- Insulation, drip rate, and noise characteristics of the grain-oriented electrical steel sheet according to Example 3 were evaluated under 1.7 T and 50 Hz, and the results are shown in Table 3.
- each oriented electrical steel sheet was subjected to laser magnetization in the direction perpendicular to the rolling, and the insulation properties, the droplet ratio, and the noise characteristics (1.7T 50HZ conditions) were measured, respectively.
- the film tension (A) and the coating amount (B) of the insulating coating composition were controlled to 63 ⁇ A / B ⁇ 1.17 (2 ⁇ B ⁇ 5). It is evaluated that further excellent effect can be obtained by doing this.
- the area ratio and noise characteristics of the l OOO kVA transformer were evaluated.
- the insulating coating composition is according to Inventive Examples A2 and A3. Select and produce the film tension (A, MPa) and the coating amount (B, g / m 2 ) in the range of 0.63 ⁇ A / B ⁇ 1.17 (2 ⁇ B ⁇ 5), respectively,
- the 100 kVA transformer to which the insulating film composition according to Inventive Example A2 is applied is 1000 kVA transformer to which the insulating film composition according to Inventive Example C1 and Inventive Example A3 is indicated as Inventive Example C2.
- Test Example Evaluation of Droplet Ratio and Noise Characteristics of a 1500 kVA Transformer
- the area ratio and noise characteristics of the 100 kVA transformer were evaluated.
- the insulating film composition was selected according to Inventive Example A3, which was selected as the film tension (A, MPa).
- the coating amount (B, g / m 2 ) are produced in the range of 0.63 ⁇ A / B ⁇ L17 (2 ⁇ B ⁇ 5), and after performing laser magnetization, a 1500 kVA transformer is manufactured to design flux.
- the results of evaluation at 60 Hz according to the density are shown in FIGS. 1 and 5.
- Comparative Example D having an A / B of 2.65, and the results were recorded in FIGS. 1 and 5.
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Abstract
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JP2017525983A JP6383495B2 (ja) | 2014-11-14 | 2014-12-04 | 方向性電磁鋼板用絶縁被膜組成物およびこれを用いて表面に絶縁被膜が形成された方向性電磁鋼板ならびにその製造方法 |
US15/526,718 US10385218B2 (en) | 2014-11-14 | 2014-12-04 | Insulating coating composition for oriented electrical steel sheet, oriented electrical steel sheet having insulating coating formed on surface thereof by using same, and preparation method therefor |
EP14905835.6A EP3219825B1 (en) | 2014-11-14 | 2014-12-04 | Oriented electrical steel sheet having insulating coating formed on surface thereof, and preparation method therefor |
CN201480083458.6A CN106922155B (zh) | 2014-11-14 | 2014-12-04 | 取向电工钢板用绝缘覆膜组合物、利用它在表面形成绝缘覆膜的取向电工钢板及其制造方法 |
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CN115851004A (zh) * | 2021-09-24 | 2023-03-28 | 宝山钢铁股份有限公司 | 一种耐热刻痕型取向硅钢涂层用涂液、取向硅钢板及其制造方法 |
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EP3219825A4 (en) | 2017-10-25 |
CN106922155A (zh) | 2017-07-04 |
US10385218B2 (en) | 2019-08-20 |
EP3219825B1 (en) | 2019-08-28 |
KR20160057753A (ko) | 2016-05-24 |
US20170313887A1 (en) | 2017-11-02 |
CN106922155B (zh) | 2019-11-05 |
EP3219825A1 (en) | 2017-09-20 |
JP2018504516A (ja) | 2018-02-15 |
KR102177038B1 (ko) | 2020-11-10 |
JP6383495B2 (ja) | 2018-08-29 |
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