WO2023121269A1 - 전기강판 절연 피막 조성물, 전기강판, 및 이의 제조 방법 - Google Patents
전기강판 절연 피막 조성물, 전기강판, 및 이의 제조 방법 Download PDFInfo
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- WO2023121269A1 WO2023121269A1 PCT/KR2022/020906 KR2022020906W WO2023121269A1 WO 2023121269 A1 WO2023121269 A1 WO 2023121269A1 KR 2022020906 W KR2022020906 W KR 2022020906W WO 2023121269 A1 WO2023121269 A1 WO 2023121269A1
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- WIPO (PCT)
- Prior art keywords
- electrical steel
- weight
- steel sheet
- group
- coating composition
- Prior art date
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 75
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- 229910000166 zirconium phosphate Inorganic materials 0.000 claims abstract description 35
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 claims abstract description 35
- 125000003118 aryl group Chemical group 0.000 claims abstract description 31
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- 125000003342 alkenyl group Chemical group 0.000 claims description 9
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 9
- 239000004137 magnesium phosphate Substances 0.000 claims description 9
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims description 9
- 229960002261 magnesium phosphate Drugs 0.000 claims description 9
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 125000000304 alkynyl group Chemical group 0.000 claims description 8
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- 239000000463 material Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 125000003545 alkoxy group Chemical group 0.000 claims description 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 6
- 125000000623 heterocyclic group Chemical group 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
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- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical group C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 3
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical group C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 3
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- 230000002087 whitening effect Effects 0.000 description 3
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
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- MROZYFGXESLRQQ-UHFFFAOYSA-N 2-[3-[4-[2-[4-[3-(oxiran-2-ylmethoxy)propoxy]phenyl]propan-2-yl]phenoxy]propoxymethyl]oxirane Chemical compound C=1C=C(OCCCOCC2OC2)C=CC=1C(C)(C)C(C=C1)=CC=C1OCCCOCC1CO1 MROZYFGXESLRQQ-UHFFFAOYSA-N 0.000 description 1
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
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- C09D5/084—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
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- C09D7/67—Particle size smaller than 100 nm
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Definitions
- An embodiment of the present invention relates to an electrical steel sheet insulation coating composition, an electrical steel sheet, and a manufacturing method thereof. Specifically, an electrical steel sheet insulation coating composition having improved adhesion and insulation after stress relief annealing (SRA) using a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and zirconium phosphate, an electrical steel sheet, and It relates to a method for producing it.
- SRA stress relief annealing
- Insulation coatings of non-oriented electrical steel sheets used in motors and transformers require various characteristics as well as interlayer resistance. For example, convenience during processing and molding, stability during storage and use, and the like. In addition, since the non-oriented electrical steel sheet is used for various purposes, various insulating coatings are being developed according to the purpose.
- An embodiment of the present invention provides an electrical steel sheet insulation coating composition, an electrical steel sheet, and a manufacturing method thereof. Specifically, an electrical steel sheet insulation coating composition having improved adhesion and insulation after stress relief annealing using a resin and zirconium phosphate containing two or more aromatic rings or aliphatic rings in a repeating unit, an electrical steel sheet, and a manufacturing method thereof are provided.
- An insulating coating composition for electrical steel includes 100 parts by weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and 20 to 150 parts by weight of zirconium phosphate.
- the resin may be an epoxy resin.
- the repeating unit may be represented by Formula 1 below.
- X is a divalent organic group containing two or more aromatic rings or aliphatic rings
- R 1 is hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a chloroalkyl group, a cycloalkenyl group, an aryl group, or a heterocyclic group , represents an alkoxy group, a carboxy group or a halogen.
- X may include at least one of a bisphenol structure, a biphenyl structure, a naphthalene structure, an anthracene structure, and a dicyclopentadiene structure.
- Zirconium phosphate may have a crystalline phase of 5% by mass or less.
- the insulation coating composition for an electrical steel sheet according to an embodiment of the present invention may further include 0.1 to 100 parts by weight of magnesium phosphate.
- the insulation coating composition for electrical steel sheet according to an embodiment of the present invention may further include 0.1 to 100 parts by weight of inorganic nanoparticles.
- the inorganic nanoparticle may include one or more of SiO 2 , Al 2 O 3 , MgO, ZnO, ZrO 2 , TiO 2 , Mn 2 O 3 , and CaO.
- the inorganic nanoparticles may have an average particle diameter of 1 to 100 nm.
- An electrical steel sheet includes an electrical steel sheet base material and an insulating film positioned on the surface of the electrical steel sheet base material, and the insulating film contains 100 weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit. and 20 to 150 parts by weight of zirconium phosphate.
- Insulation coating is Zr: 6 to 60%, C: 7 to 70%, Si: 1 to 40%, Al: 1 to 40%, Mg: 1 to 45%, P: 1 to 70%, and B: It includes 1 or 2 or more selected from the group consisting of 0.01 to 9%, and the balance may include Fe and unavoidable impurities.
- the electrical steel substrate is a group consisting of Si: 2.0 to 6.5%, Mn: 0.1 to 3.0%, Al: 0.1 to 7.5%, B: 0.1% or less, Sn: 0.01 to 0.15%, and Sb: 0.01 to 0.15% in weight%. It may include one or two or more selected from, and the balance may include Fe and unavoidable impurities.
- a method for manufacturing an electrical steel sheet according to an embodiment of the present invention includes preparing a substrate for an electrical steel sheet; and forming an insulating film by applying an insulating film composition to the surface of the electrical steel substrate.
- the insulation coating composition includes 100 parts by weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and 20 to 150 parts by weight of zirconium phosphate.
- an organic compound and zirconium phosphate having a specific chemical structure adhesion and insulation after stress relief annealing are improved.
- FIG. 1 is a schematic view of a cross section of an electrical steel sheet according to an embodiment of the present invention.
- first, second and third are used to describe, but are not limited to, various parts, components, regions, layers and/or sections. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, a first part, component, region, layer or section described below may be referred to as a second part, component, region, layer or section without departing from the scope of the present invention.
- an "alkyl group” includes not only an alkyl group having no substituent (unsubstituted alkyl group) but also an alkyl group having a substituent (substituted alkyl group).
- substitution is a compound in which at least one hydrogen is a C1 to C30 alkyl group; C2 to C30 alkenyl group, C2 to C30 alkynyl group, C1 to C10 alkylsilyl group; C3 to C30 cycloalkyl group; C6 to C30 aryl group; C1 to C30 heteroaryl group; C1 to C10 alkoxy group; silane group; Alkylsilane group; an alkoxysilane group; amine group; Alkylamine group; Arylamine group; It means substituted with an ethyleneoxyl group or a halogen group.
- hetero means an atom selected from the group consisting of N, O, S, and P, unless otherwise defined.
- alkyl group is a "saturated alkyl group” that does not contain any alkenyl group or alkynyl group; or an "unsaturated alkyl group” containing at least one alkenyl group or alkynyl group.
- alkenyl group refers to a substituent in which at least two carbon atoms form at least one carbon-carbon double bond
- alkyne group refers to a substituent in which at least two carbon atoms form at least one carbon-carbon triple bond. it means.
- the alkyl group may be branched, straight-chain or cyclic.
- the alkyl group may be a C1 to C20 alkyl group, specifically, a C1 to C6 lower alkyl group, a C7 to C10 intermediate alkyl group, or a C11 to C20 higher alkyl group.
- a C1 to C4 alkyl group means that there are 1 to 4 carbon atoms in the alkyl chain, which is methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl and t-butyl. indicates that it is selected from the group consisting of
- Typical alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, hexyl, ethenyl, propenyl, butenyl, cyclopropyl, cyclobutyl, cyclo There is a pentyl group, a cyclohexyl group, and the like.
- Heterocyclic group means a ring group containing a heteroatom selected from the group consisting of N, O, S and P in the ring group.
- the heterocyclic group may include 1 to 3 heteroatoms for each ring.
- Heteroaryl groups are also included in heterocyclic groups.
- an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group is a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, An aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group.
- An insulating coating composition for electrical steel includes 100 parts by weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and 20 to 150 parts by weight of zirconium phosphate.
- the insulation coating composition according to an embodiment of the present invention includes a resin compound having a unique chemical structure and zirconium phosphate to dramatically improve adhesion and insulation after stress relief annealing.
- a resin containing two or more aromatic rings or aliphatic rings in a repeating unit of an insulating coating for electrical steel sheet according to an embodiment of the present invention is included.
- a resin containing two or more aromatic rings or aliphatic rings in a repeating unit has excellent heat resistance because it contains two or more aromatic rings or aliphatic rings. If only one aromatic ring or aliphatic ring is included or not included, a problem may occur in terms of coating peeling during the customer's heat treatment process. More specifically, the resin may include 2 to 5 aromatic rings or aliphatic rings in the repeating unit. Two or more types of resins may be included in the composition. In this case, the number of rings may be obtained as an average number of resins in the composition, and the total resins in the composition may include two or more aromatic rings or aliphatic rings in the repeating unit. .
- the resin may be an epoxy resin.
- the epoxy resin may include a chemical structure derived from an epoxy structure in a repeating unit. Epoxy resins may be advantageous in terms of miscibility with zirconium and inorganic nanoparticles and solution stability compared to other resins such as urethane resins.
- a resin containing two or more aromatic rings or aliphatic rings in a repeating unit may be represented by Formula 1 below.
- X is a divalent organic group containing two or more aromatic rings or aliphatic rings
- R 1 is hydrogen, an alkyl group, an alkenyl group, an alkynyl group, a chloroalkyl group, a cycloalkenyl group, an aryl group, or a heterocyclic group , represents an alkoxy group, a carboxy group or a halogen.
- X may include at least one of a bisphenol structure, a biphenyl structure, a naphthalene structure, an anthracene structure, and a dicyclopentadiene structure.
- R 1 represents hydrogen, an alkyl group, an aryl group, a carboxy group or a halogen.
- the resin containing two or more aromatic rings or aliphatic rings in the repeating unit includes Bisphenol A Epoxy Resin, Bisphenol F Epoxy Resin, and Phenol Novolac Epoxy Resin. Resin) and Cresol Novolac Epoxy Resin. More specifically, Bisphenol A propoxylate diglycidyl ether (product number 475750) and Poly[(phenyl glycidyl ether)-co-formaldehyde] (product number 406775, 406767) can be used.
- An insulation coating composition for electrical steel sheet according to an embodiment of the present invention includes 20 to 150 parts by weight of zirconium phosphate based on 100 parts by weight of the resin.
- Zirconium phosphate serves to impart insulation and adhesion to the film.
- metal phosphates various phosphates such as Al, Mg, Ni, Mn, Sr, Br, Ca, Co, and Zn are known.
- zirconium phosphate is used. Compared to other phosphates, zirconium phosphate reacts stably with a resin containing two or more aromatic rings or aliphatic rings in a repeating unit at a high temperature, thereby contributing to improving adhesion and insulation after SRA.
- Zirconium phosphate is included in an amount of 20 to 150 parts by weight based on 100 parts by weight of the resin. If too little zirconium phosphate is included, coating peeling problems may occur. If too much zirconium phosphate is included, the viscosity of the solution increases rapidly, causing a coating thickness deviation problem. More specifically, zirconium phosphate may be included in an amount of 50 to 135 parts by weight based on 100 parts by weight of the resin. In one embodiment of the present invention, the weight part means a relative weight ratio with respect to the resin.
- the zirconium phosphate 5 mass% or less of 100 mass of the zirconium phosphate may be a phosphate phase.
- the crystalline phase of phosphate means that zirconium and phosphoric acid particles are regularly arranged, and can be analyzed using XRD measurement. As more crystal phases of phosphate are formed, pores are formed, which is disadvantageous in terms of high-temperature adhesion, limiting the upper limit.
- the crystalline phase of the phosphate can be reduced.
- the insulation coating composition for electrical steel according to an embodiment of the present invention may further include 0.1 to 100 parts by weight of magnesium phosphate based on 100 parts by weight of the resin.
- magnesium phosphate serves to supplementally improve adhesion.
- the coating layer absorbs moisture and causes whitening defects, resulting in poor surface properties.
- magnesium phosphate may be further included in an amount of 1 to 50 parts by weight based on 100 parts by weight of the resin.
- the insulation coating composition for electrical steel according to an embodiment of the present invention may further include 0.1 to 100 parts by weight of inorganic nanoparticles based on 100 parts by weight of the resin.
- the inorganic nanoparticles prevent precipitation or agglomeration of the insulation coating composition, and contribute to more excellent surface characteristics after stress relief annealing.
- the inorganic nanoparticles may be chemically bonded to a substituent of a resin. When the inorganic nanoparticles are added alone without binding to the resin, the inorganic nanoparticles may aggregate and may not be properly dispersed.
- the meaning of being chemically bonded to the substituent of the resin means that the inorganic particle is substituted and bonded to the substituent of the substituent of the resin.
- the inorganic nanoparticle may include one or more of SiO 2 , Al 2 O 3 , MgO, ZnO, ZrO 2 , TiO 2 , Mn 2 O 3 , and CaO.
- the inorganic nanoparticles may have an average particle diameter of 1 to 100 nm. Appropriate dispersibility can be secured within the above range. More specifically, it may be 10 to 50 nm.
- inorganic nanoparticles When the inorganic nanoparticles are further included, 0.1 to 100 parts by weight of the inorganic nanoparticles may be further included with respect to 100 parts by weight of the resin. When too many inorganic nanoparticles are added, the content of the resin is relatively low, and thus problems may occur in terms of adhesion. More specifically, 10 to 80 parts by weight of inorganic nanoparticles may be further included.
- the insulation coating composition according to an embodiment of the present invention may further include an oxidation accelerator.
- An example of an oxidation promoter may be sodium perborate (NaBO 3 .4H 2 O).
- the oxidation promoter may be included in an amount of 5 parts by weight or less based on 100 parts by weight of the resin.
- the insulation coating composition may include a solvent to facilitate application and uniformly disperse the components.
- a solvent to facilitate application and uniformly disperse the components.
- Water, alcohol, etc. can be used as a solvent.
- the amount of the solvent is not particularly limited, but may include 50 parts by weight to 1000 parts by weight based on 100 parts by weight of the resin.
- an electrical steel sheet 100 according to an embodiment of the present invention includes an electrical steel sheet substrate 10 and an insulating film 20 positioned on the electrical steel sheet substrate 10 .
- the electrical steel substrate 10 a general non-oriented or grain-oriented electrical steel sheet may be used without limitation.
- the main configuration is to form the insulating film 20 of a special component on the electrical steel substrate 10
- a detailed description of the electrical steel substrate 10 will be omitted. 1
- the insulating film 20 is present on the upper surface of the electrical steel base material 10, but is not limited thereto, and the insulating film 20 may exist on the lower surface or on the upper and lower surfaces of the electrical steel base material 10.
- the insulating film 20 includes 100 parts by weight of a resin containing two or more aromatic rings or aliphatic rings in a repeating unit and 20 to 150 parts by weight of zirconium phosphate.
- the insulating film 20 of the electrical steel sheet 100 includes a unique resin and zirconium phosphate to dramatically improve adhesion and insulation after stress relief annealing.
- the components of the insulating film 20 have been specifically described in relation to the above-described insulating film composition, overlapping descriptions will be omitted.
- the chemical structure of some resins may be modified, but most of the resins maintain their chemical structure. Since volatile components such as solvents are removed in the process of forming the insulation film 20, the ratio of components in the insulation film 20 is substantially the same as the weight ratio relative to the resin in the insulation film composition.
- Insulation film 20 contains, by weight, Zr: 6 to 60%, C: 7 to 70%, Si: 1 to 40%, Al: 1 to 40%, Mg: 1 to 45%, P: 1 to 70% and B: 0.01 to 9%, and the balance may include Fe and unavoidable impurities. More specifically, C: 7 to 70%, Zr: 6 to 60% and P: 1 to 70%, Si: 1 to 40%, Al: 1 to 40%, Mg: 1 to 45%, and B: It includes 1 or 2 or more selected from the group consisting of 0.01 to 9%, and the balance may include Fe and unavoidable impurities.
- Zr 6 to 60%, C: 7 to 70%, Si: 1 to 40%, Al: 1 to 40%, Mg: 1 to 45%, P: 1 to 70%, and B: 0.01 to 9 % and the balance may include Fe and unavoidable impurities.
- C may be derived from a resin in the insulation coating composition.
- Zr and P may be derived from zirconium phosphate in the insulation coating composition.
- the remaining Si, Al, Mg, B, etc. may be diffused from the electrical steel substrate 10 or derived from additional components of the insulation coating composition.
- the insulating film 20 may include elements derived from the insulating film composition and the electrical steel substrate 10 .
- the thickness of the insulating film 20 may be 0.05 to 10 ⁇ m. If the thickness of the insulating film 20 is too thin, heat resistance is lowered, and a problem of iron loss after stress relief annealing may occur. If the thickness of the insulating film 20 is too thick, the space factor may decrease, resulting in poor motor characteristics. Therefore, the thickness of the insulating film 20 can be adjusted within the above range. More specifically, the thickness of the insulating film 20 may be 0.1 to 5 ⁇ m.
- the electrical steel substrate 10 may be used without limitation of a non-oriented electrical steel sheet or a grain-oriented electrical steel sheet. Specifically, a non-oriented electrical steel sheet may be used.
- the insulating properties are generated by the components of the insulating film 20, and may be independent of the alloy components of the electrical steel sheet.
- an alloy component of an electrical steel sheet will be described.
- the electrical steel substrate 10 contains Si: 2.0 to 6.5%, Mn: 0.1 to 3.0%, Al: 0.1 to 7.5%, B: 0.1% or less, Sn: 0.01 to 0.15%, and Sb: 0.01 to 0.15% in weight%. It includes one or two or more selected from the group consisting of, and the balance may include Fe and unavoidable impurities. More specifically, the electrical steel substrate 10 contains Si: 2.0 to 6.5%, Mn: 0.1 to 3.0%, Al: 0.1 to 7.5%, B: 0.1% or less, Sn: 0.01 to 0.15%, and Sb: 0.01% by weight. to 0.15%, and the balance may include Fe and unavoidable impurities.
- Silicon (Si) is a component that reduces eddy current loss among iron losses by increasing the specific resistance of the steel, and when the content of Si is too large, brittleness increases and cold rolling may become difficult. Therefore, it is preferable to limit it to 6.5% by weight or less. More specifically, Si may be included in an amount of 2.5 to 4.5% by weight.
- Mn manganese
- S component when manganese (Mn) is present in an amount of less than 0.1% by weight, fine MnS precipitates are formed to inhibit crystal grain growth, thereby deteriorating magnetism. Therefore, when it is present in an amount of 0.1% by weight or more, it is possible to prevent formation of coarse MnS and precipitation of CuS, which is a finer precipitate, of the S component.
- magnetism deteriorates when Mn increases, it is added at 3.0% by weight or less. More specifically, it may include 0.5 to 2.0% by weight.
- Al is an effective component for reducing eddy current loss by increasing specific resistance.
- AlN is finely precipitated, resulting in poor magnetism, and in the case of more than 7.5% by weight, workability deteriorates, so it is preferable to limit it to 7.5% by weight or less. More specifically, it may include 0.5 to 3.0% by weight.
- B may form precipitates such as BN and deteriorate magnetism, it may be included in an amount of 0.100% by weight or less. More specifically, it may include 0.001 to 0.050% by weight.
- Sb and Sn as surface precipitated elements, concentrate on the surface layer of the steel sheet to suppress adsorption of nitrogen, and as a result, they do not hinder the growth of crystal grains and play a role in lowering iron loss. If the content of Sb or Sn is too large, grain boundary segregation occurs severely, and brittleness of the steel sheet increases, which may cause sheet breakage during rolling. More specifically, 0.05 to 0.10 wt% of Sn and Sb may be included.
- C 0.01% by weight or less
- P 0.5% by weight or less
- S 0.005% by weight or less
- N 0.005% by weight or less
- Ti 0.005% by weight or less
- a method for manufacturing an electrical steel sheet according to an embodiment of the present invention includes preparing a substrate for an electrical steel sheet; and forming an insulating film by applying an insulating film composition to the surface of the electrical steel substrate.
- step S10 an electrical steel sheet substrate is manufactured. Since the alloy components of the electrical steel base material have been specifically described, repeated descriptions will be omitted.
- Manufacturing the electrical steel base material includes preparing a hot-rolled sheet by hot-rolling a slab; It may include preparing a cold-rolled sheet by cold-rolling the hot-rolled sheet and annealing the cold-rolled sheet.
- the slab is heated.
- the slab heating may be heated at 1,200 ° C or less.
- the heated slab is hot-rolled to produce a hot-rolled sheet.
- the manufactured hot-rolled sheet may be hot-rolled and annealed.
- the hot-rolled sheet is cold-rolled to manufacture a cold-rolled sheet.
- Cold rolling may be performed once, or cold rolling may be performed twice or more including intermediate annealing.
- the cold-rolled sheet is annealed.
- the rolling oil present in the cold-rolled sheet is degreased, primary annealing is performed, and secondary annealing may be performed in an atmosphere composed of hydrogen and nitrogen.
- the dew point temperature may be managed below -5°C for the purpose of preventing deterioration of magnetism due to the formation of oxides on the surface.
- step S20 an insulation coating composition is applied to the surface of the electrical steel substrate to form an insulation coating. Since the insulation coating composition is the same as that described above, overlapping descriptions will be omitted.
- Forming the insulation film may include heat-treating the steel sheet coated with the insulation film composition at a temperature of 100 to 680°C. If the heat treatment temperature is too low, it is not easy to remove the solvent and it is difficult to form a beautiful insulating film. If the heat treatment temperature is too high, a problem of poor adhesion may occur. More specifically, heat treatment may be performed at a temperature of 350 to 650 °C. Heat treatment time may be 5 to 200 seconds.
- a step of stress relief annealing at a temperature of 700 to 1000° C. may be further included.
- the stress relief annealing may be performed in a nitrogen atmosphere and may be performed for 1 to 5 hours.
- the slab was heated at 1130° C. and hot-rolled to a thickness of 2.3 mm to prepare a hot-rolled sheet.
- the cold-rolled sheet was subjected to final annealing after adjusting the dew point temperature in an atmosphere of 20% hydrogen and 80% nitrogen at 1040° C. for 50 seconds to prepare an annealed steel sheet.
- the resin, zirconium phosphate, SiO 2 , and magnesium phosphate prepared in Preparation Example were mixed with distilled water to prepare a slurry form, and after applying the slurry to the final annealed steel sheet using a roll, 30° C. at 650° C. Second heat treatment and cooling in air.
- the electrical steel sheet was subjected to stress relief annealing (SRA) at 750°C for 2 hours in a 100% nitrogen atmosphere and then cooled in air.
- SRA stress relief annealing
- the contents of the resin, zirconium phosphate, SiO 2 , and magnesium phosphate in the insulation coating composition were varied as shown in Table 1.
- the insulating properties were measured on the top of the insulating film using a Franklin measuring instrument according to the ASTM A717 international standard.
- the adhesion is expressed as the minimum arc diameter without peeling of the film when the specimen is bent 180° in contact with a 10 to 100 mm arc.
- Example 1 100 87 31 6 0.40 220 400 10
- Example 2 100 71 4 28 0.72 340 580 10
- Example 3 100 89 37 19 1.00 350 580 10
- Example 4 100 89 36 6 0.99 358 653 10
- Example 5 100 41 15 14 0.72 560 670 10
- Example 6 100 90 74 74 1.46 0 120
- Example 7 100 72 56 88 1.36 90 110
- Example 8 100 109 10 22 1.13 60 550
- Example 9 100 134 24 48 1.50 110 700
- Example 10 100 118 12 28 0.20 390 544 30
- Comparative Example 1 100 (1,2-Epoxy-3-phenoxypropane) 90 36 19 0.89 890 990 70
- Comparative Example 2 100 15 36 200 --- --- --- Comparative Example 3 100 17 7 19
- Comparative Example 1 which does not use an appropriate resin, has inferior insulation properties and adhesion after SRA.
- Comparative Examples 4 and 5 containing an excessive amount of zirconium phosphate showed poor adhesion after SRA.
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Abstract
Description
비고 | 수지 (중량부) |
지르코늄 인산염 (중량부) |
실리카 (중량부) |
마그네슘 인산염 (중량부) |
두께(um) | 절연 (mA) |
SRA 후 절연 (mA) |
SRA 후 밀착성 (mmphi) |
실시예 1 | 100 | 87 | 31 | 6 | 0.40 | 220 | 400 | 10 |
실시예 2 | 100 | 71 | 4 | 28 | 0.72 | 340 | 580 | 10 |
실시예 3 | 100 | 89 | 37 | 19 | 1.00 | 350 | 580 | 10 |
실시예 4 | 100 | 89 | 36 | 6 | 0.99 | 358 | 653 | 10 |
실시예 5 | 100 | 41 | 15 | 14 | 0.72 | 560 | 670 | 10 |
실시예 6 | 100 | 90 | 74 | 74 | 1.46 | 0 | 120 | 10 |
실시예 7 | 100 | 72 | 56 | 88 | 1.36 | 90 | 110 | 10 |
실시예 8 | 100 | 109 | 10 | 22 | 1.13 | 60 | 550 | 10 |
실시예 9 | 100 | 134 | 24 | 48 | 1.50 | 110 | 700 | 10 |
실시예 10 | 100 | 118 | 12 | 28 | 0.20 | 390 | 544 | 30 |
비교예 1 | 100 (1,2-Epoxy-3-phenoxypropane) |
90 | 36 | 19 | 0.89 | 890 | 990 | 70 |
비교예 2 | 100 | 15 | 36 | 200 | --- | --- | --- | --- |
비교예 3 | 100 | 17 | 7 | 19 | 1.09 | 102 | 820 | 80 |
비교예 4 | 100 | 178 | 189 | 60 | 0.70 | 200 | 180 | 100 |
비교예 5 | 100 | 207 | 78 | 62 | 0.17 | 420 | 630 | 80 |
Claims (13)
- 반복 단위내 방향족 고리 또는 지방족 고리를 2개 이상 포함하는 수지 100 중량부 및지르코늄 인산염 20 내지 150 중량부 포함하는 전기강판용 절연 피막 조성물.
- 제1항에 있어서,수지는 에폭시 수지를 포함하는 전기강판용 절연 피막 조성물.
- 제3항에 있어서,상기 화학식 1에서 X는 비스페놀 구조, 비페닐 구조, 나프탈렌 구조, 안트라센 구조 및 디시클로펜타디엔 구조 중 1종 이상 포함하는 전기강판용 절연 피막 조성물.
- 제1항에 있어서,상기 지르코늄 인산염은 5질량% 이하가 결정상인 전기강판용 절연 피막 조성물.
- 제1항에 있어서,마그네슘 인산염을 0.1 내지 100 중량부 더 포함하는 전기강판용 절연 피막 조성물.
- 제1항에 있어서,무기 나노 입자를 0.1 내지 100 중량부 더 포함하는 전기강판용 절연 피막 조성물.
- 제7항에 있어서,상기 무기 나노 입자는 SiO2, Al2O3, MgO, ZnO, ZrO2, TiO2, Mn2O3, 및 CaO 중 1종 이상을 포함하는 전기강판용 절연 피막 조성물.
- 제7항에 있어서,상기 무기 나노 입자는 평균입경이 1 내지 100nm인 전기강판용 절연 피막 조성물.
- 전기강판 기재 및상기 전기강판 기재의 표면 상에 위치하는 절연 피막을 포함하고,상기 절연 피막은 반복 단위내 방향족 고리 또는 지방족 고리를 2개 이상 포함하는 수지 100 중량부 및 지르코늄 인산염 20 내지 150 중량부 포함하는 전기강판.
- 제10항에 있어서,상기 절연 피막은 중량%로 Zr: 6 내지 60%, C: 7 내지 70%, Si: 1 내지 40%, Al: 1 내지 40%, Mg: 1 내지 45%, P: 1 내지 70% 및 B: 0.01 내지 9%로 이루어진 군에서 선택되는 1 또는 2 이상을 포함하고 잔부가 Fe 및 불가피한 불순물을 포함하는 전기강판.
- 제10항에 있어서,상기 전기강판 기재는 중량%로 Si: 2.0 내지 6.5%, Mn: 0.1 내지 3.0%, Al: 0.1 내지 7.5%, B: 0.1% 이하, Sn: 0.01 내지 0.15% 및 Sb: 0.01 내지 0.15%로 이루어진 군에서 선택되는 1 또는 2 이상을 포함하고 잔부가 Fe 및 불가피한 불순물을 포함하는 전기강판.
- 전기강판 기재를 준비하는 단계; 및상기 전기강판 기재의 표면에 절연 피막 조성물을 도포하여 절연 피막을 형성하는 단계를 포함하고,상기 절연 피막 조성물은 반복 단위내 방향족 고리 또는 지방족 고리를 2개 이상 포함하는 수지 100 중량부 및 지르코늄 인산염 20 내지 150 중량부 포함하는 전기강판의 제조 방법.
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MX2024007664A MX2024007664A (es) | 2021-12-22 | 2022-12-20 | Composición de recubrimiento aislante para lamina de acero eléctrico, lamina de acero eléctrico y método para fabricar la misma. |
CN202280088761.XA CN118475656A (zh) | 2021-12-22 | 2022-12-20 | 电工钢板绝缘覆膜组合物、电工钢板及其制造方法 |
EP22911902.9A EP4455229A1 (en) | 2021-12-22 | 2022-12-20 | Insulation coating composition for electrical steel sheet, electrical steel sheet, and method for manufacturing same |
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KR1020210185101A KR20230095527A (ko) | 2021-12-22 | 2021-12-22 | 전기강판 절연 피막 조성물, 전기강판, 및 이의 제조 방법 |
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US20080153976A1 (en) * | 2004-12-21 | 2008-06-26 | Nippon Kayaku Kabushiki Kaisha | Epoxy Resin, Epoxy Resin Composition, And Cured Material Thereof |
WO2010123314A2 (ko) * | 2009-04-24 | 2010-10-28 | 한국생산기술연구원 | 새로운 에폭시 수지 및 이를 포함하는 에폭시 수지 조성물 |
US20110007489A1 (en) * | 2008-03-25 | 2011-01-13 | Sumitomo Bakelite Company, Ltd | Epoxy resin composition, resin sheet, prepreg, multilayer printed wiring board and semiconductor device |
KR20130031914A (ko) * | 2010-07-22 | 2013-03-29 | 제이에프이 스틸 가부시키가이샤 | 반유기 절연 피막이 형성된 전기 강판 |
US20170137664A1 (en) * | 2014-12-19 | 2017-05-18 | Hexion Inc. | Curing agent for epoxy coatings |
-
2021
- 2021-12-22 KR KR1020210185101A patent/KR20230095527A/ko unknown
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2022
- 2022-12-20 WO PCT/KR2022/020906 patent/WO2023121269A1/ko active Application Filing
- 2022-12-20 MX MX2024007664A patent/MX2024007664A/es unknown
- 2022-12-20 EP EP22911902.9A patent/EP4455229A1/en active Pending
- 2022-12-20 CN CN202280088761.XA patent/CN118475656A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080153976A1 (en) * | 2004-12-21 | 2008-06-26 | Nippon Kayaku Kabushiki Kaisha | Epoxy Resin, Epoxy Resin Composition, And Cured Material Thereof |
US20110007489A1 (en) * | 2008-03-25 | 2011-01-13 | Sumitomo Bakelite Company, Ltd | Epoxy resin composition, resin sheet, prepreg, multilayer printed wiring board and semiconductor device |
WO2010123314A2 (ko) * | 2009-04-24 | 2010-10-28 | 한국생산기술연구원 | 새로운 에폭시 수지 및 이를 포함하는 에폭시 수지 조성물 |
KR20130031914A (ko) * | 2010-07-22 | 2013-03-29 | 제이에프이 스틸 가부시키가이샤 | 반유기 절연 피막이 형성된 전기 강판 |
US20170137664A1 (en) * | 2014-12-19 | 2017-05-18 | Hexion Inc. | Curing agent for epoxy coatings |
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MX2024007664A (es) | 2024-09-04 |
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CN118475656A (zh) | 2024-08-09 |
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