WO2007074928A1 - 絶縁被膜を有する電磁鋼板およびその製造方法 - Google Patents
絶縁被膜を有する電磁鋼板およびその製造方法 Download PDFInfo
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- WO2007074928A1 WO2007074928A1 PCT/JP2006/326341 JP2006326341W WO2007074928A1 WO 2007074928 A1 WO2007074928 A1 WO 2007074928A1 JP 2006326341 W JP2006326341 W JP 2006326341W WO 2007074928 A1 WO2007074928 A1 WO 2007074928A1
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- resin
- steel sheet
- resins
- polysiloxane
- insulating coating
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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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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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
- B05D7/14—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 to metal, e.g. car bodies
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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
- B05D7/24—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 for applying particular liquids or other fluent materials
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/10—Block or graft copolymers containing polysiloxane sequences
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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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
- C21D8/1277—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
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
- H01F1/18—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets with insulating coating
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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
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
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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
- B05D2701/00—Coatings being able to withstand changes in the shape of the substrate or to withstand welding
- B05D2701/10—Coatings being able to withstand changes in the shape of the substrate or to withstand welding withstanding draw and redraw process, punching
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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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31507—Of polycarbonate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31511—Of epoxy ether
- Y10T428/31529—Next to metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31562—Next to polyamide [nylon, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31573—Next to addition polymer of ethylenically unsaturated monomer
- Y10T428/31587—Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31605—Next to free metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the present invention relates to an electrical steel sheet having an insulating coating.
- the present invention relates to an electrical steel sheet having an insulating coating that does not contain Cr.
- hexavalent yarns are also contained in the coating and in the coating solution.
- This field relates to electrical steel sheets that do not contain harmful substances such as 1 Rom and that take the environment into consideration.
- Insulation coatings on electrical steel sheets used for motors and transformers are required to have various characteristics in addition to interlayer resistance. For example, convenience during processing, storage, and stability during use.
- electrical steel sheets are used in a variety of applications, and various insulating coatings have been developed according to the application.
- strain relief smelting is performed at about 75 to 85 to restore the deteriorated magnetic properties.
- the insulating film must withstand strain relief annealing.
- Insulating coatings are: (a) Emphasis on weldability and heat resistance, non-organic coatings that can withstand strain relief annealing (in principle, does not include organic resin), (b) Aiming for both punchability and weldability, Semi-organic coatings that can withstand annealing and contain inorganic resin based on inorganic materials, and (c) Organic coatings that cannot be subjected to strain relief annealing for special applications.
- the general-purpose products that can withstand strain relief annealing are the coatings containing the inorganic substances (a) and (b), and both contain chromium compounds in the coatings.
- a chromate-based insulating coating containing an organic resin of the type (b) is widely used because punchability can be remarkably improved as compared with an inorganic insulating coating.
- Japanese Examined Patent Publication No. 6 0-3 6 4 7 6 discloses that a heavy citrate aqueous solution containing at least one divalent metal is mixed with CrO 3 in the aqueous solution: 100% by weight.
- acetate Bulle / Beoba (VeoVa) (TM) ratio 9 0/1 0-4 0 6 5-0 of the resin Emarujo emissions is a ratio of resin solids 1 2 0 parts by weight of an organic reducing
- the agent is blended at a ratio of 10 to 60 parts by weight to form a coating liquid, which is applied to the surface of the steel sheet, and a conventional baking process is performed.
- An electrical steel sheet having an electrically insulating coating formed after the process is described.
- Japanese Patent Laid-Open No. Hei 10-3 4 8 1 2 discloses a method for reducing the amount of Cl and S in a resin / silica coating to a specified amount or less as a method for improving the corrosion resistance of an inorganic colloid system. ing. According to this method, the corrosion resistance of the product plate is improved in the wet test environment. However, the corrosion resistance under severe conditions such as salt spray does not reach the corrosion resistance when the Cr-containing insulating coating is used. In addition, when silica is added, the punchability is not as good as the corrosion resistance when using a Cr-containing insulating film. Disclosure of the invention
- electrical steel sheets must have wet corrosion resistance under normal temperature environment, salt spray corrosion resistance, and corrosion resistance after high-temperature treatment (after strain relief annealing) at 700 or higher.
- the electromagnetic copper sheet has an exposed iron surface.
- the present invention has performance equivalent to or higher than that of a Cr-containing insulating coating, and is excellent in corrosion resistance and punching performance, even if it is an insulating coating composed mainly of an inorganic substance not containing Cr.
- An object is to provide an electrical steel sheet having an insulating coating.
- the inventors of the present invention have intensively studied to solve the above problems. As a result, the following knowledge was obtained.
- colloidal silica does not form a three-dimensional network (three-dimensional structure) at a baking temperature of about 200 to 300 ° C. It was estimated that this was the cause of cracks in the coating and the corrosion resistance varying depending on the manufacturing conditions.
- inorganic components and organic components are combined (copolymerized) at the resin synthesis stage.
- polysiloxane (inorganic component) and one or more organic resins such as acrylic resin were copolymerized to obtain a polysiloxane polymer.
- the silanol group (-SiOH) of polysiloxane and the hydroxyl group (-0H) of organic resin are dehydrated and covalently bonded. Is a complex that is firmly bound to each other.
- This polysiloxane polymer combines the hardness and barrier properties of inorganic properties, the flexibility of organic properties, and processability.
- the polysiloxane polymer is three-dimensionally cross-linked through a cross-linking agent.
- a cross-linking agent Specifically, one or two selected from a melamine, an isocyanate, a silane coupling agent, and an oxaline that are reactive with the bipolar groups of the hydroxyl group in the organic resin and the silanol group of the polysiloxane unit.
- Crosslink with more than one species of Tachibana The present invention has been made based on the above findings, and the gist thereof is as follows.
- Polysiloxane and organic resins such as attaryl resin and styrene resin
- the inorganic film in the insulating film is selected from silicate force, silicate, alumina, titania, tin oxide, cerium oxide, antimony oxide, tungsten oxide and molybdenum oxide.
- One or more types 75 mass for the total solid content of the coating.
- the electrical steel sheet of the present invention is a steel sheet having an insulating coating
- the insulating coating is a composite resin (polysiloxane polymer) obtained by previously copolymerizing polysiloxane and an organic resin (that is, a polymer containing C element). Is included. This is the most important requirement in the present invention. And by having such an insulating film, it has corrosion resistance (particularly annealing plate corrosion resistance) and punching ability equivalent to or better than the electrical steel sheet having a Cr-containing insulating film.
- An electromagnetic steel plate (also called an electric iron plate) before forming a coating that can be used in the present invention is a steel plate (iron plate) whose specific resistance is adjusted to obtain desired magnetic properties (for example, low iron loss).
- the steel sheet has any composition, it is not particularly limited. In particular, it can be applied to medium to high-grade electrical steel sheets of about W 15/50 ⁇ 5.
- the surface of the electrical steel sheet on which the insulation film is formed is subjected to any pretreatment such as degreasing treatment with alkali, pickling treatment with hydrochloric acid, sulfuric acid, phosphoric acid, etc., emphasis treatment or magnetic domain subdivision treatment.
- Insulating coating> it may be, or it may be an unprocessed surface as it is manufactured. Furthermore, it is not always necessary to form the third layer between the insulating coating and the surface of the ground iron, but it may be formed if necessary. For example, in a normal manufacturing method, a force that may cause an oxide film of a base metal to be formed between the insulating film and the surface of the base iron may be omitted. In addition, although a forsterite film is formed depending on the production method, it is possible to save the trouble of removing this film. Insulating coating>
- the insulating coating of the present invention applied to the surface of the steel sheet comprises the following essential components: polysiloxane and organic It is obtained by applying a treatment liquid containing a resin to the surface of the magnetic steel sheet and then baking it. At that time, a polysiloxane polymer obtained by copolymerizing polysiloxane and an organic resin in advance is contained in the treatment liquid.
- Polysiloxane is a polymer having one S i—o— (siloxane bond) in the main chain.
- This polysiloxane is previously copolymerized with an organic resin.
- _SiOH silanol group of polysiloxane
- hydroxyl group one OH
- silanol group of the organic resin when the silanol group is introduced into the organic resin in advance.
- the ratio of the polysiloxane in the insulating coating is preferably 10% by mass or more and 90% by mass or less in terms of SiO 2 with respect to the total solid content (that is, the total coating amount after baking). 10 mass. If it is less than 0 , the sticking property may be inferior because the remaining ratio of the coating film after strain relief annealing decreases. If this ratio is increased, the coating will become stronger, but if it exceeds 90% by mass, flexibility (flex ibi li ty) will be insufficient, and corrosion resistance may deteriorate depending on the production conditions.
- the particle size of the polysiloxane of the present invention is not particularly limited, but is preferably more than 0.03 / m and less than 0.5 / 1 m.
- the particle size when the particle size is small, the stability of the solution is lowered. Therefore, considering workability, it is preferable to set it to more than 0.032 m. Also the coating From the viewpoint of appearance, it is preferable that the particle size is small, so it is preferable that the particle size be 0.5 ⁇ 1 or less.
- the particle size refers to the value obtained by observing the particles with an electron microscope or the like, measuring the maximum diameter and the minimum diameter for each particle, and calculating the average value.
- the organic resin copolymerized with the polysiloxane the following resins are applicable. Examples include acrylic resin, styrene resin, vinyl acetate resin, resin, polyester resin, urethane resin, polyethylene resin, polypropylene resin, polyamide resin, polycarbonate resin, phenol resin, alkyd resin, and epoxy resin. One or more selected from the group consisting of the above polysiloxanes are copolymerized.
- a polysiloxane polymer in which polysiloxane and the above organic resin are copolymerized forms a tertiary bond through a S i O — C— bond or a S i — 0 — S 1 — C— bond. From the viewpoint of forming the original network, it is better if it has a functional group capable of binding to the side chain of the organic resin skeleton.
- the ratio of the polymer having a C element to the total solid content in the insulation coating is arbitrarily preferred to the port (S i0 2 converted value of the) polysiloxane ratio of 0.1 times or more.
- the degree of polymerization of the polysiloxane polymer is within a range where a treatment liquid can be obtained, it can be applied without any problem.
- the particle size of the polysiloxane polymer is preferably more than 0.04 / z m and less than 0.6 / m, and if it is less than 0.04 / z m, the stability of the solution decreases. If it exceeds 0.6 m, the film becomes rough and the appearance deteriorates.
- one or more of melamine, isocyanate, silane cutting agent, and oxadoline are used as a crosslinking agent in a total amount of 1 to 50 weights per 100 parts by weight of the polysiloxane polymer.
- Part. Add a Tachibana agent.
- cross-linking between the polysiloxane polymers occurs, forming a denser film and improving the corrosion resistance, particularly after the stress relief annealing. If the total of these is less than 1 part by weight, the effect of crosslinking cannot be obtained and the corrosion resistance after strain relief annealing is insufficient.
- the present invention has the ability to obtain the desired properties, in addition to the above-mentioned inclusions, within the range that does not impair the effects of the present invention, additives for the following purposes, other inorganic compounds, organic Compounds can be included.
- additives for the following purposes other inorganic compounds, organic Compounds
- film formation performance deteriorates if added too much, so the total amount of additives, other inorganic compounds, and organic compounds
- the amount is preferably about 75% by mass or less based on the total coating amount of the insulating coating of the invention. More preferably, it is about 50% by mass or less.
- additives known surfactants, antifungal agents, lubricants, antifoaming agents, and the like can be added.
- the added amount is preferably about 30% by mass or less, based on the total solid content of the film.
- the insulating coating of the present invention can contain an organic compound that is not copolymerized with other inorganic compounds and / or polysiloxanes to the extent that the effects of the present invention are not impaired.
- the inorganic compound for example, other oxides (sols) can be added as long as liquid stability can be secured.
- the addition of an inorganic compound is preferable because it improves the adhesion, corrosion resistance, and sticking properties of the annealed plate.
- it is 75 mass% or less, more preferably 40 mass%, based on the total solid content of the coating.
- / Contains 0 or less. Also preferably 5 mass. / 0 or more, more preferably 10% by mass or more.
- the organic compound that is not copolymerized with polysiloxane examples include the same organic resin as the organic resin that is copolymerized with the aforementioned polysiloxane.
- the object of the present invention is to obtain good film properties without adding a cucumber compound. Therefore, it is preferable that the insulating coating of the present invention does not substantially contain Cr from the viewpoint of preventing environmental contamination from the manufacturing process and products. Is a chromium amount allowed as a non pure product, it is preferable to zero. 1 mass% or less C r 0 3-converted amount relative to the total solid weight (total coating amount) of the insulating coating . Manufacturing method>
- the pretreatment of the electrical steel sheet used as the starting material of the present invention is not particularly specified.
- Non-treated or degreasing treatments such as Al, and pickling treatments such as hydrochloric acid, sulfuric acid and phosphoric acid are preferably applied.
- the copolymerization treatment for obtaining the polysiloxane polymer is known in various ways, for example, a method of copolymerizing each monomer, and one or the other as a polymer for further copolymerization.
- a polymerization method a method in which one copolymer is used as a trunk and the other monomer or copolymer is polymerized like a branch can be applied.
- an insulating coating is formed on the magnetic steel sheet by subjecting the surface of the magnetic steel sheet coated with the treatment liquid to a baking process.
- the treatment liquid 1 0-9 0 weight polysiloxane ratio S i0 2 terms on the total solid content. / 0 is preferred.
- 10 mass If it is less than 0 , the remaining ratio of the film after the strain relief annealing decreases, so the sticking property may be inferior. If this ratio is increased, the coating will become stronger. When it exists, flexibility is insufficient and corrosion resistance may deteriorate depending on manufacturing conditions.
- the coating material to be applied to the electrical steel sheet is preferably water-based or oil-based, pasty or liquid, but from the viewpoint of not increasing the coating thickness (coating adhesion amount) more than necessary, it is a liquid based on water or an organic solvent. It is preferable to do.
- treatment liquid includes, in principle, paste.
- a method for applying the insulating film a method using various facilities such as a roll coater, a flow coater, a spray, a knife coater, a bar coater and the like, which are generally used in industry, can be applied.
- the baking method a hot air method, an infrared heating method, an induction heating method, etc., which are usually performed, are possible. If the baking temperature is at a normal level, the temperature is preferably 35 ° C. or lower in order to avoid thermal decomposition of the resin. A more preferable range is 150 ° C. or more and 300 ° C. or less.
- the basis weight of the insulating coating is not particularly limited, but it is preferably 0.05 g / m 2 or more and 10 g / m 2 or less per side.
- Good Ri preferably, in total per one side is 0. Lg Z m 2 or more l O g Zm 2 below. If it is less than 0.5 g / m 2 , uniform application is difficult by an industrial means, and it may be difficult to ensure stable punchability and corrosion resistance. On the other hand, if it exceeds 10 g / m 2 , the coating performance is not improved further, which may be uneconomical.
- the basis weight is measured on a steel plate that has been baked and not subjected to strain relief annealing. Can be used.
- the basis weight after strain relief annealing is preferably about 0.01 g / m 2 or more and 9. O g / m 2 or less.
- the insulating coating of the present invention is preferably on both sides of the steel sheet, but depending on the purpose, it may be on only one side. That is, depending on the purpose, only one surface may be applied, and the other surface may be another insulating film, or the other surface may not be provided with an insulating coating.
- the electrical steel sheet having the insulating coating of the present invention is used for the purpose of performing strain relief smelting at about 750 to 85, in order to make use of the heat resistance of the coating. Is the best.
- it is particularly suitable for use in which a laminated iron core is obtained by punching a magnetic steel sheet and performing strain relief annealing and then laminating.
- the steel component is Si: 0.45 mass%, ⁇ 111: 0.25 mass. / 0 , A1: 0.4 8 mass.
- a full-process electrical steel sheet containing / 0 and having a final annealing thickness of 0.5 mm was used.
- a treatment liquid obtained by further adding a cross-linking agent shown in the same table to a polysiloxane polymer obtained by previously copolymerizing polysiloxane and each organic resin under the conditions shown in Tables 1 and 3 is used as the electromagnetic wave.
- On the surface of the steel plate it was applied with a roll coater and baked in a hot air oven at a baking temperature: ultimate plate temperature of 230 ° C to obtain a test material.
- the chemicals listed in Tables 1 and 3 were added as components other than the polysiloxane polymer.
- test material electrical steel sheet having an insulating coating
- a boiling 50% aqueous NaOH solution was dissolved in a boiling 50% aqueous NaOH solution, and the basis weight of the insulating coating was measured by the weight method described above.
- test material was subjected to a salt spray test (35 tons) stipulated by JIS, and the occurrence rate of red wrinkles after 5 hours was evaluated by visual area ratio.
- the specimen was annealed in a nitrogen atmosphere under the condition of 7500 ° CX 2 h.
- the obtained annealed plate was subjected to a constant temperature and humidity test (50 ° C, relative humidity 80%). ) And the occurrence rate of red wrinkles after 14 days was evaluated by visual area rate.
- Solvent hexane
- the magnetic steel sheet was sheared, the flash height was 20 / m, a 20 mm inner diameter and 500 g weight was placed on the left steel sheet, the test steel sheet surface was reciprocated three times in the horizontal direction, and the degree of damage was visually evaluated.
- the specimen was punched using a 15 ⁇ steel die until the burr height reached 50 ⁇ , and the number of punches was evaluated.
- Annealing was performed under conditions of 7500 ° C. for 2 hours in a nitrogen atmosphere while applying 10 pieces of 50 mm square specimens and applying a load (20.0 g / cm 2 ). Next, 50 Og of weight was dropped on the test material (steel plate), and the drop height when dividing into 5 parts was investigated.
- Example 1 AA AABBAB
- Example 2 AA AABBAB
- Example 3 AA AABBAB
- Example 4 BB AA AABBAB
- Example 5 AA AA AABBAB
- Example 6 AA AABBAB
- Example 7 AB AA AABBAB
- Example 8 AB AA AABBAB
- Example 9 AA AABBAB
- Example 10 BB AA AABBAB
- Example 11 AA
- AA AABBAB Example 12
- BB AA BBBBAB
- Example 13 BB BBBBAB
- Example 14 BB AA BBBBAB
- Example 14 A A AA AABBAB
- Example 16 AA AABBAB
- Example 17 AA AAAABB
- Example 18 AB AA ABAABB
- Example 19 AA AA ABAABB
- Example 20 AB AA ABAABB
- Example 21 BA
- Example 22 BA AA AAAABB
- Example 22 BA AA AAAABB
- the examples of the present invention are excellent in corrosion resistance, adhesion, solvent resistance, scratch resistance, punching properties, and sticking properties.
- the above characteristics are even more excellent in the present invention examples in which the ratio of the polysiloxane is within the preferred range.
- the comparative example at least one of corrosion resistance, adhesion, solvent resistance, scratch resistance, punching property, and sticking property is inferior.
- an electrical steel sheet having an insulating coating excellent in corrosion resistance and punchability can be obtained.
- the electrical steel sheet having the insulating coating of the present invention does not contain chromium, and has various performances equivalent to or higher than those of the Cr-containing insulating coating such as corrosion resistance and punchability.
- the present invention is an industrially useful invention that is environmentally friendly not only in the final product but also in the manufacturing process and can be widely used for applications such as motors and transformers.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2633360A CA2633360C (en) | 2005-12-28 | 2006-12-26 | Electrical steel sheet having insulation coating and method for manufacturing same |
BRPI0620852-5A BRPI0620852B1 (pt) | 2005-12-28 | 2006-12-26 | Chapa de aço elétrica dotada de revestimento de isolamento e método para fabricar a mesma |
EP06843714A EP1967612A4 (en) | 2005-12-28 | 2006-12-26 | ELECTROMAGNETIC STEEL PLATE WITH INSULATING COATING FILM AND METHOD OF MANUFACTURING THEREOF |
US12/159,276 US20100233484A1 (en) | 2005-12-28 | 2006-12-26 | Electrical steel sheet having insulation coating and method for manufacturing same |
CN2006800498684A CN101351574B (zh) | 2005-12-28 | 2006-12-26 | 具有绝缘覆膜的电磁钢板及其制造方法 |
Applications Claiming Priority (4)
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JP2005-377067 | 2005-12-28 | ||
JP2005377067 | 2005-12-28 | ||
JP2006345946A JP5098327B2 (ja) | 2005-12-28 | 2006-12-22 | 絶縁被膜を有する電磁鋼板 |
JP2006-345946 | 2006-12-22 |
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WO2007074928A1 true WO2007074928A1 (ja) | 2007-07-05 |
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PCT/JP2006/326341 WO2007074928A1 (ja) | 2005-12-28 | 2006-12-26 | 絶縁被膜を有する電磁鋼板およびその製造方法 |
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US (1) | US20100233484A1 (ja) |
EP (1) | EP1967612A4 (ja) |
JP (1) | JP5098327B2 (ja) |
KR (1) | KR101006033B1 (ja) |
BR (1) | BRPI0620852B1 (ja) |
CA (1) | CA2633360C (ja) |
RU (1) | RU2395623C2 (ja) |
TW (1) | TWI306900B (ja) |
WO (1) | WO2007074928A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2008154122A1 (en) * | 2007-06-12 | 2008-12-18 | E. I. Du Pont De Nemours And Company | Insulation coating composition for electrical steel |
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JP6030668B2 (ja) * | 2013-08-28 | 2016-11-24 | Jfeスチール株式会社 | 絶縁被膜付き電磁鋼板およびその製造方法、ならびに絶縁被膜形成用被覆剤 |
CN103721916B (zh) * | 2013-12-11 | 2015-02-11 | 甘肃大禹节水集团股份有限公司 | 一种交联聚乙烯涂层修饰的聚氯乙烯管材的生产方法 |
JP6344490B2 (ja) * | 2015-02-13 | 2018-06-20 | Jfeスチール株式会社 | 方向性電磁鋼板およびその製造方法 |
CN104877563A (zh) * | 2015-06-11 | 2015-09-02 | 张家港市五湖新材料技术开发有限公司 | 一种防电磁干扰的电路板用三防漆 |
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EP3495430A1 (de) | 2017-12-07 | 2019-06-12 | Henkel AG & Co. KGaA | Chrom- und phosphatfreie beschichtung zur elektrischen isolierung von elektroband |
WO2019188585A1 (ja) * | 2018-03-28 | 2019-10-03 | 日本製鉄株式会社 | 方向性電磁鋼板用絶縁皮膜を形成するための塗布液、方向性電磁鋼板の製造方法、および方向性電磁鋼板 |
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KR20200017108A (ko) * | 2018-08-08 | 2020-02-18 | 주식회사 포스코 | 강판 표면코팅용 조성물 및 이를 이용하여 표면이 코팅된 강판 |
JP7129945B2 (ja) * | 2019-05-09 | 2022-09-02 | Jfeスチール株式会社 | 絶縁被膜形成用被覆剤 |
EP4050122A4 (en) * | 2019-10-21 | 2022-12-28 | JFE Steel Corporation | ELECTROMAGNETIC STEEL SHEET WITH INSULATION COATING FILM |
CN110713791A (zh) * | 2019-11-25 | 2020-01-21 | 浙江中通汽车零部件有限公司 | 一种高稳定性连接螺母的合成树脂涂料及其涂层工艺 |
KR102391988B1 (ko) * | 2020-12-21 | 2022-04-27 | 주식회사 포스코 | 전기강판 및 이의 적층체 |
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- 2006-12-22 JP JP2006345946A patent/JP5098327B2/ja active Active
- 2006-12-26 RU RU2008130866A patent/RU2395623C2/ru not_active IP Right Cessation
- 2006-12-26 EP EP06843714A patent/EP1967612A4/en not_active Withdrawn
- 2006-12-26 CA CA2633360A patent/CA2633360C/en active Active
- 2006-12-26 KR KR1020087015666A patent/KR101006033B1/ko active IP Right Grant
- 2006-12-26 WO PCT/JP2006/326341 patent/WO2007074928A1/ja active Application Filing
- 2006-12-26 US US12/159,276 patent/US20100233484A1/en not_active Abandoned
- 2006-12-26 BR BRPI0620852-5A patent/BRPI0620852B1/pt not_active IP Right Cessation
- 2006-12-28 TW TW95149428A patent/TWI306900B/zh active
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JPS5431598A (en) * | 1977-08-15 | 1979-03-08 | Nippon Steel Corp | Steel plate for electromagnet which has heat reistant property and anti-stain film and its surface traeting method |
JPS6283071A (ja) * | 1985-10-05 | 1987-04-16 | Sumitomo Metal Ind Ltd | 耐焼付性、打抜性に優れた電磁鋼板 |
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WO2008154122A1 (en) * | 2007-06-12 | 2008-12-18 | E. I. Du Pont De Nemours And Company | Insulation coating composition for electrical steel |
JP2010529282A (ja) * | 2007-06-12 | 2010-08-26 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 電気鋼のための絶縁コーティング組成物 |
Also Published As
Publication number | Publication date |
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CA2633360A1 (en) | 2007-07-05 |
BRPI0620852A2 (pt) | 2011-11-22 |
TW200732480A (en) | 2007-09-01 |
KR101006033B1 (ko) | 2011-01-06 |
JP2007197824A (ja) | 2007-08-09 |
US20100233484A1 (en) | 2010-09-16 |
CA2633360C (en) | 2014-04-15 |
KR20080080590A (ko) | 2008-09-04 |
TWI306900B (en) | 2009-03-01 |
RU2008130866A (ru) | 2010-02-10 |
EP1967612A4 (en) | 2010-03-31 |
EP1967612A1 (en) | 2008-09-10 |
JP5098327B2 (ja) | 2012-12-12 |
RU2395623C2 (ru) | 2010-07-27 |
BRPI0620852B1 (pt) | 2019-07-02 |
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