WO2005090636A1 - 絶縁被膜を有する電磁鋼板 - Google Patents
絶縁被膜を有する電磁鋼板 Download PDFInfo
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- WO2005090636A1 WO2005090636A1 PCT/JP2005/004879 JP2005004879W WO2005090636A1 WO 2005090636 A1 WO2005090636 A1 WO 2005090636A1 JP 2005004879 W JP2005004879 W JP 2005004879W WO 2005090636 A1 WO2005090636 A1 WO 2005090636A1
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- insulating coating
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- zirconium
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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
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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
- C23C22/08—Orthophosphates
- C23C22/20—Orthophosphates containing aluminium cations
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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
- C23C22/60—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 alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
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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
- C23C22/73—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 characterised by the process
- C23C22/74—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 characterised by the process for obtaining burned-in conversion coatings
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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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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
- C23C28/042—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides
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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
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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
Definitions
- the present invention relates to an electrical steel sheet having an insulating coating not containing Cr.
- Insulating coatings on magnetic steel sheets used for motors and transformers are required to have not only interlayer resistance but also various characteristics. For example, convenience in processing and molding, and stability in storage and use are required. Furthermore, since electrical steel sheets are used for a variety of applications, various insulating coatings are being developed according to the applications.
- the strain removal hardening is performed at about 750 to 850 ° C.
- the insulating film must be resistant to strain relief annealing.
- the insulating coating is (1) an inorganic coating (which does not contain an organic resin in principle) that resists strain relief annealing with emphasis on weldability and heat resistance, and (2) strain relief annealing aiming at both punchability and weldability.
- the coatings containing inorganic substances (1) and (2) that resist strain relief annealing as general-purpose products both contain chromium compounds.
- the chromate-based insulating coating containing an organic resin of the type (2) is widely used because the punching property can be remarkably improved as compared with the inorganic insulating coating.
- Japanese Examined Patent Publication No. Sho 60-364476 discloses that a heavy oxalate-based aqueous solution containing at least one kind of divalent metal is added to the aqueous solution of CrO 3: 100% by weight.
- TM vinyl acetate / veova
- environmental awareness has been increasing, and even in the field of electrical steel sheets, products having an insulation coating containing no Cr have been desired by consumers and the like.
- Japanese Patent Application Laid-Open No. Hei 10-13058 discloses a resin containing alumina and silica as a colloidal silica as an insulating coating having good punching properties without containing Cr. ing.
- an inorganic colloidal substance composed of one or more of colloidal silica, alumina sol, and zirconazole is used in an amount of 15 to 400 parts by weight of a water-soluble or emulsion type resin.
- An insulating film formed by applying and baking the aqueous solution added above is described in JP-A-10-46350.
- Japanese Patent No. 2861702 discloses that a coating composed of at least one oxide polymer of Al, Si, Ti, and Zr has A1, Si, Ti
- An insulating coating containing 35 to 90% by weight of oxide fine particles (particle diameter: 10 to 100 nm) comprising at least one of Zr and Zr is disclosed.
- an insulating coating mainly containing a chromium-free phosphate and containing a colloidal silicide force selectively with a resin is described in Japanese Patent No. 2944848.
- Japanese Patent Application Laid-Open No. Hei 9-313655 discloses that 100 to 100 parts by weight of an organic resin is mixed with 5 to 100 parts by weight of a phosphoric acid and 20 to 100 parts by weight of a modified food such as Mn, Mg, and A1.
- the baking temperature should be as low as possible from the viewpoint of reducing energy consumption and manufacturing cost, but the above problem is particularly likely to occur when baking at a relatively low temperature of 300 ° C or less. In the case where the temperature is 200 ° C. or less, the occurrence becomes remarkable. . DISCLOSURE OF THE INVENTION
- the present invention has been made to solve the above-described problems, and is an insulating coating mainly composed of an inorganic substance that does not contain Cr. It is an object of the present invention to provide an electrical steel sheet with an insulating coating having excellent corrosion resistance (before removal annealing), powder blowing resistance and appearance, as well as corrosion resistance and scratch resistance after strain relief annealing.
- the present invention provides the following electromagnetic steel sheet with an insulating coating in order to solve the above problems.
- An electrical steel sheet having an insulating coating containing a Zr compound, an A1 compound and a 'Si compound as main components, wherein the content of the Zr compound with respect to the total solid content of the insulating coating is Z is a 4 5-9 0 wt% as a value converted into r O 2, the electromagnetic steel sheet having an insulation coating.
- An electrical steel sheet having an insulating coating containing at least one selected from phosphoric acid and phosphate, a Zr compound, an A1 compound, and a Si compound as main components. , relative to the total solid content of the insulating film, and a content in terms of at least one of P 0 4 selected from the phosphoric acid Contact Yopirin acid salt, before Symbol converted to Z r 0 2 of Z r compound And the total content is 45-90 mass. / 0, 0 a value ratio of the both content in terms of P 0 4 ZZ R_ ⁇ 2.0 1 to 0.4 0, electrical steel sheet having an insulation coating.
- the insulating coating has at least one of M—O—Zr and M—OH—Zr, An electrical steel sheet having the insulating coating described in 2 above.
- An aqueous treatment solution containing at least an A1 compound, a Si compound, and a Zr compound in a dissolved or colloidal state is applied to a steel sheet, and then baked, which is any one of the above 1 to 6.
- An electrical steel sheet with an insulating coating having the insulating coating described in (1).
- the Zr compound contained in the aqueous treatment solution is zirconium acetate, zirconium propionate, zirconium oxychloride, zirconium nitrate, zirconium carbonate ammonium, zirconium carbonate, hydroxyzirconium chloride, zirconium sulfate. , Dinoreconium phosphate, sodium diaconium phosphate, zirconium potassium hexafluoride, tetranalpropoxydiconium, tetranalbutoxyzirconium, zirconium tetracetylacetonate, zirconium tributoxyacetate 9.
- the electrical steel sheet having an insulating film according to the above item 8 wherein the Zr compound contained in the aqueous treatment liquid is at least one selected from zirconium acetate and zirconium nitrate.
- the Zr compound contained in the aqueous treatment liquid is at least one selected from zirconium acetate and zirconium nitrate.
- the A1 compound contained in the aqueous treatment liquid is at least one selected from the group consisting of an A1 compound composed of a hydroxyl machine and an organic acid, and a dehydration reaction product thereof.
- An electromagnetic steel sheet having the insulating coating as described in any one of 1 to 12 above, further comprising at least a second insulating coating on the surface of the insulating coating.
- the electromagnetic steel sheet having the insulating coating as described in 13 or 14, wherein the second insulating coating contains an A1 compound, a Si compound, and a resin.
- a method for producing an electromagnetic steel sheet having an insulating coating which is 45 to 90% by mass in terms of
- the requirements in 3 to 16 above may be adopted as suitable conditions.
- Figure 1 shows the effect of the amount of Zr compound added to the insulating coating (horizontal axis: mass%) on the corrosion resistance (vertical axis) after baking (before strain relief annealing).
- Figure 2 shows the effect of the amount of Zr compound added to the insulating coating (horizontal axis: mass%) on the scratch resistance after strain relief annealing (vertical axis).
- Figure 3 is a diagram showing the effect on 'P_ ⁇ 4 / Z r O 2 (wt%) of 7 5 ° ⁇ blow of burned insulation film with C (vertical axis).
- Fig. 4 shows the powder blowing resistance (vertical axis) of the insulating coating (black circles) containing phosphoric acid and / or phosphate and the baking temperature (horizontal axis: ° C) and the insulating coating not containing it (open triangles).
- the present invention is an electrical steel sheet having an insulating coating containing a Zr compound, an A1 compound, a Si compound and, if necessary, phosphoric acid and / or a phosphate as a main component.
- the electromagnetic steel sheet (also referred to as an electric iron sheet) before the formation of the insulating film can be any steel sheet of any composition adjusted to obtain desired magnetic characteristics by changing the specific resistance.
- Well not particularly limited.
- the specific resistance improving components S i, A l, M n, C r, P, N i, and C u are selected from the specific resistance improving components S i, A l, M n, C r, P, N i, and C u. It is preferable to add at least one of them as needed.
- the content of these elements may be determined according to the desired magnetic properties, but S i: about 5% by mass or less (including no addition, the same applies hereinafter), A 1: about 3% by mass or less,: about 1% by mass 0.0 mass% or less, Cr: about 5 mass% or less, P: about 0.5 mass% or less, Ni: about 5 mass% or less Lower, Cu: about 5% by mass or less, respectively.
- a typical magnetic steel sheet is one in which 3 :: is added in an amount of 0.1% by mass or more, but for low-grade products, Si: 0.05% by mass or more is preferable.
- the balance other than the above is iron and secondary impurities. Examples of the impurities include C, N, and a small amount of S which is less effective as an O-inhibitor. It is better to reduce the number of these unfamiliar substances, but if they are not high-grade products, they may contain about 0.02 to 0.05% by mass of C.
- the thickness of the electromagnetic steel sheet of the present invention is not particularly limited. It is preferably about 0.02 to 1.0 mm, which is a normal thickness.
- the surface of the magnetic steel sheet on which the insulating coating is formed may be subjected to any pretreatment, such as a degreasing treatment using an aluminum alloy or a pickling treatment using hydrochloric acid, sulfuric acid, phosphoric acid, or the like. On the other hand, it may be an untreated surface as produced.
- a third layer between the insulating coating and the steel surface is not required in principle, but is not banned.
- an oxide film of the base metal may be formed between the insulating film and the surface of the base iron.
- the insulating coating of the present invention can be obtained by applying a coating material containing the following essential components or more preferable components to the surface of the steel sheet and subjecting it to a drying and / or baking treatment.
- the coating material to be applied is preferably in the form of an aqueous paste or liquid, but is preferably liquid (aqueous liquid) from the viewpoint of not unnecessarily increasing the coating thickness (coating amount).
- the processing liquid when the processing liquid is called, in principle, it also includes a paste shape, but the effect described will be more pronounced in the case of a liquid.
- the insulating coating applied to the steel sheet of the present invention contains a specific amount of a Zr compound.
- ⁇ ⁇ has a maximum of eight coordination numbers, and generally binds strongly to other substances, especially oxygen, by four bonds. For this reason, it is considered that a strong film can be formed without using a chromium compound by firmly binding to oxides and hydroxides on the Fe surface.
- the corrosion resistance is slightly inferior, and the scratch resistance after strain relief annealing tends to be greatly deteriorated. This is thought to be because the network is not well formed due to the large number of bonds of the Zr compound, resulting in a brittle coating.
- the present inventor has limited the amount of the Zr compound to a predetermined range, mixed with the A1 compound and the Si compound, and further mixed with phosphoric acid and Z or a phosphate if necessary, thereby greatly improving the effect. Was obtained.
- Suitable content a value in terms of Z r 0 2, 4 5% or more based on the total solid mass of the insulating film is 90% or less. More preferably, it is 50% or more and 80% or less. In such a range, the film becomes strong, which is considered to be because a bonding network between the Zr compound and another substance is formed well. As will be described later, when phosphoric acid and Z or a phosphate are further contained, the total amount of phosphoric acid and the like should be within the above range.
- the “mass of the total solid content” is the adhesion amount of the film formed on the surface of the magnetic steel sheet after drying by the method described later.
- the total solid content mass can be measured from the weight loss after the removal of the film due to the peeling off of the force.
- the "converted to Z R_ ⁇ 2" means that Z r contained all assuming to form a Z r 0 2, to calculate the amount of Z r O 2. After that, simply referred to as "in the Z r 0 2 conversion" for the sake of simplicity. The same applies to the conversion of other compounds.
- the Zr compound that can be used as a raw material of the insulating film include zirconium acetate, zirconium propionate, and zirconium oxychloride.
- A1 compound and Si compound which are essential components of the insulating coating material in the present invention, phosphoric acid and Z or phosphate which are optional components, other inorganic compounds and organic compounds which are optional components described later, And the compatibility with additives.
- Z r compounds listed above are congeners of Z r H ⁇ , T i is have these oxides (H f ⁇ 2, T i 0 2), further S i ⁇ 2, F e 2 0 3 and the like which may contain less total about 5% by weight as a non neat.
- main impurities H f or H a [O 2.
- the water-soluble Zr compound is preferably used as the raw material of the insulating coating rather than the water-insoluble paste. This is because bonding with other substances becomes strong and a more dense film is formed.
- water-soluble refers to a substance that dissolves in water or forms a colloid and is stably dispersed in water.
- the Zr compound be in a solution or colloidal form via at least one of a hydroxyl group, an organic acid, an inorganic acid, and water.
- a hydroxyl group an organic acid, an inorganic acid, and water.
- the hydroxyl group, organic acid, inorganic acid, and water may be present in the molecule of the Zr compound or may be supplied from the outside (for example, those that form an association state).
- aqueous colloids, zirconium acetate that forms a solution, and zirconium nitrate that forms a solution are particularly preferable raw materials.
- Z r O (NO 3) 2 As the form of the zirconium nitrate, Z r O (NO 3) 2, Z r O (NO 3) leaving at, and the like as the examples.
- phosphoric acid and phosphoric acid or phosphate can be contained in the insulating coating together with the Zr compound.
- phosphoric acid and / or phosphate can be contained in the insulating coating together with the Zr compound.
- the Z r O 2 and converted to the content of phosphate and / or phosphate Z r Compound PO 4 the sum of the terms the content and 4 5-9 0% by weight and the ratio of the content, based on the converted value P 0 4 / Z r O 2 of 0.0 1 to the value 0. 40.
- Z r and Z r O 2-converted content of the compound, or phosphoric acid Contact Yopi Z large deal of improvement in the following cases: 9 0 mass% in total of PO 4-converted content of phosphate The effect is obtained. On the other hand, if the total amount is less than 45% by mass, the effect is small, which is not preferable. Further, Z r and Z r O 2-converted content of the compound, 0.0 1 ratio of P o 4-converted content of phosphoric acid Contact Yopinomatawa phosphate in P 0 4 Bruno Z r 0 2 If it is up to 0.40, problems such as powder blowing do not occur even if the film is formed at a low temperature of about 200 ° C.
- the effect of phosphoric acid, Z, or phosphate to improve powder blowing resistance during low-temperature baking is small. If it exceeds 0.40, the Zr compound and phosphoric acid in the processing solution will react with each other, and the coating will tend to be coarse, resulting in a decrease in the effect of improving the powder blowing resistance. The effect of improving the scratch resistance after annealing is also slightly reduced.
- the treatment liquid is stable, and a strong film is quickly formed when moisture is removed.
- the inventors have discovered that they have excellent properties for dressing.
- the mechanism for stabilizing this treatment solution is as follows: (1) Since zirconium has a strong binding force to water, water collects around the Zr compound in the treatment solution and acts as a blocking agent for phosphoric acid. ) In the presence of water, the Zr compound coordinates around the phosphoric acid (salt) to form a relatively stable complex. In each case, it is considered that the phosphorylation of Zr proceeds promptly when the water disappears.
- phosphoric acid and Z or phosphates When phosphoric acid and Z or phosphates are added, solidification is accelerated if the water content is low, which affects workability. Therefore, when a coating material having a low moisture content is used, for example, to obtain a thicker coating, it is preferable that phosphoric acid and / or phosphate is not added or the addition amount is suppressed.
- the phosphoric acid that can be contained in the treatment liquid in the present invention is not particularly limited as long as it is industrially available. For example, orthophosphoric acid, phosphoric anhydride, linear polyphosphoric acid, and cyclic metaphosphoric acid can be preferably applied.
- a water-soluble salt such as phosphoric acid Mg, phosphoric acid A1, phosphoric acid Ca, and phosphoric acid Zn can be preferably used.
- phosphoric acid phosphates can be used alone or in combination of two or more.
- the insulating coating of the present invention contains a Si compound.
- S i compound is a compound heat resistance is high and stable, contributing to the performance improvement of the coating by reacting with Z r to produce a complex of such zircon (Z r (S i O 4 )).
- Z r (S i O 4 ) zircon
- a colloidal sily force is preferably applied as the Si compound to be contained in the treatment liquid.
- the colloidal force is an inorganic colloid mainly composed of SiO 2 , and is often in an amorphous state.
- the particle size is preferably 20 nm or less, more preferably 10 nm or less, and the lower limit is not particularly limited, since the smaller the particle size, the better the film is formed.
- the particle diameter may be set from a desired concentration to a particle diameter suitable for practical use.
- the average particle size can be measured by the BET method (converted from the specific surface area by the adsorption method). It is also possible to substitute the average value (ball diameter conversion) actually measured from the electron micrograph.
- the insulating coating of the present invention contains an A1 compound.
- the A1 compound contributes to improving the properties of the coating by forming a stable composite with high heat resistance with the Zr compound.
- an A1 compound comprising a hydroxyl group and an organic acid and / or a dehydration reaction product thereof are preferably applied, and examples thereof include alumina sol.
- the AI compound is preferably one that can be dissolved in water or dispersed in a colloid-suspended state.
- the shape may be any shape, such as feather-like or spherical, as long as there is no problem in characteristics.
- the A1 and Si compounds do not contain other metal elements in an amount of impurities or more.
- Insulation coating of the present invention the said A 1 compound and the S i compound, with A 1 2 0 3 in terms of contact Yopi S i O 2 terms, 2 0: 8 0-8 0: 2 0 (mass ratio) It is preferable that the content is included in the range. This ratio is more preferably in the range of 30:70 to 70:30 (mass ratio), and still more preferably in the range of 35:65 to 65:35 (mass ratio).
- the A 1 compound and the Si compound have such masses.
- the bonding form of the Zr compound to other substances is as follows: Al, Si, P (if contained) and Fe. When these are represented by M, it is considered that they have at least one of the bonding states of M—O—Zr and M—OH—Zr.
- Zr—O—Fe, Zr—OH—Fe, A1—O—Zr—O—A1, Si—O_Zr_ through oxygen or glacial groups It is considered to have a bonding state of O_Si, P-O-Zr-O-P.
- ⁇ or OH is supplied from surrounding water molecules or oxygen or hydroxyl groups contained in any compound.
- the insulating coating of the present invention is considered to be composed of an amorphous composite oxide containing Zr, Si, Al, P (when contained) and Fe (including some impurities).
- Can be The present invention provides, as described above, an insulating film containing the Zr compound, the A1 compound, the Si compound, and more preferably phosphoric acid and / or a phosphate as a main component. It is a magnetic steel sheet having.
- Z r 0 2 terms, A 1 2 0 3 in terms, S i 0 2 terms the total solid mass of P 0 4 the total amount of content of each component converted insulating film About 80% by mass or more. The total amount is preferably 90% by mass or more.
- the present invention is an electromagnetic steel sheet having an insulating coating consisting only of the Zr compound, the A1 compound, the Si compound, and more preferably phosphoric acid or phosphate. It is preferable from the viewpoint of securing the improvement effect. However, if the amount is not more than a predetermined amount, it is also preferable to include the following additives in addition to these four components. Additives>
- the insulating film of the present invention may contain, if necessary, a surfactant (a nonionic, cationic, or anionic surfactant; a silicone surfactant; an acetylene diol, etc.). ), Organic and inorganic additives such as antioxidants (such as amines and non-amines), boric acid, silane coupling agents (such as aminosilane and epoxysilane), and lubricants (such as wax). Is also preferred. As these additives, it is possible to use known additives which are applied to conventionally known insulating coatings of mouthpiece and non-chromating insulating coatings proposed so far. it can. '
- the content is preferably about 10% by mass or less based on the total solid content of the insulating film of the present invention in order to maintain good film properties.
- the insulating coating of the present invention may contain other inorganic compounds and organic or organic compounds to such an extent that the impeachment of the present invention is not impaired.
- the amount of the resin, particularly the resin contained in the second insulating film described later, is small, particularly less than 5% by mass, and preferably about 3% by mass. / 0 or less can be contained. However, if it is contained excessively, the resin becomes defective and the corrosion resistance deteriorates, so it is preferably not added.
- the present invention aims to obtain good film properties without adding a compound. Therefore, it is preferable that the insulating coating of the present invention does not substantially contain Cr from the viewpoint of preventing environmental pollution from the manufacturing process and the product.
- the chromium amount allowed as impurities it is preferably 0. 1 mass% or less C r ⁇ 3-converted amount relative to the total solid mass of the insulating coating. Insulating coating manufacturing method>
- a method for producing the insulating coating of the present invention on the surface of an electromagnetic steel sheet will be described.
- an electromagnetic steel plate (electric iron plate) is used as a starting material of the present invention.
- the pretreatment of the steel sheet in the present invention is not particularly defined. Unprocessed or Al Degreasing treatment such as hydrochloric acid, sulfuric acid and phosphoric acid is preferably applied. Then, on the magnetic steel sheet, the Zr compound, the A1 compound, the Si compound, and if necessary, the phosphoric acid and Z or the phosphate, and if necessary, the additive and the like. Is applied. Thereafter, the magnetic steel sheet coated with the treatment liquid is subjected to a baking treatment as required to form an insulating film.
- Unprocessed or Al Degreasing treatment such as hydrochloric acid, sulfuric acid and phosphoric acid is preferably applied.
- the Zr compound, the A1 compound, the Si compound, and if necessary, the phosphoric acid and Z or the phosphate, and if necessary, the additive and the like. is applied. Thereafter, the magnetic steel sheet coated with the treatment liquid is subjected to a baking treatment as required to form an insulating film.
- a method of applying the insulating film a method using various equipments such as a roll coater, a flow coater, a spray, and a knife coater which are generally used in industry can be applied.
- a hot air method, an infrared heating method, an induction heating method, etc., which are usually performed, can be used.
- the baking temperature may be at a normal level, but when phosphoric acid, Z or a phosphate salt is not added, the ultimate temperature is preferably 150 ° C or higher, and 350 ° C or lower. Is preferred. A more preferred upper limit is 300 °.
- the electrical steel sheet with an insulating coating of the present invention can be subjected to strain relief annealing to remove, for example, strain due to punching.
- a strain relief annealing atmosphere an atmosphere in which iron is not easily oxidized, such as an N 2 atmosphere or a DX gas atmosphere, is used.
- slight oxidation also has an advantage.
- the dew point is high, for example, Dp: set at about 5 to 60 ° C, and the corrosion resistance is further improved by slightly oxidizing the cut end surface of the surface. Can be improved.
- a preferred strain relief annealing temperature is 600 ° C. or higher, and preferably 900 ° C. or lower.
- a more preferred lower limit is 650, but a more preferred value is at least 700. Further, it is preferable that the temperature be around 75 ° C. or more than 75 ° C. On the other hand, a more preferred upper limit is 850. Straightening It is preferable that the holding time during the dulling is long, but more preferably 2 hours or more. Insulation coating weight>
- the adhesion amount of the insulating film is not particularly specified, but is preferably at least 0.05 g / m 2 per one surface. Further, the amount of adhesion is preferably 5 g / m 2 or less.
- the adhesion amount that is, the total solid content mass of the insulating film of the present invention can be measured from the weight loss after the film is removed due to peeling off by force. When the amount of adhesion is small, fluorescence may be used; measurement may be performed using X-rays. In this case, it is better to calculate the amount of adhesion based on a calibration curve created using the Al force and the re-peeling method.
- a more preferred upper limit or lower limit is 0.1 g / m 2 or more, or 3.0 O gZm 2 or less.
- An even more preferred upper limit or lower limit is 0.2 g / m 2 or more, or 1.5 g / m 2 or less.
- the insulating coating of the present invention is preferably provided on both sides of the steel sheet, but may be provided on only one side depending on the purpose. That is, depending on the purpose, only one surface may be applied, and the other surface may be provided with another insulating film, or the other surface may not be provided with an insulating film.
- the surface of an insulating coating (hereinafter, also referred to as a “base coating”) containing the Zr compound, the A1 compound, the Si compound, and, if necessary, phosphoric acid and / or phosphate, It is preferable to have at least a second insulating coating having a different component from the base coating (hereinafter, also referred to as “upper coating”).
- the upper layer coating may be formed as at least one layer on the surface of the base layer, but may be two or more layers. It is not necessary to particularly limit the composition of each upper layer coating, but it is preferable that the composition does not substantially contain Cr for the same reason as the underlayer coating.
- the upper coating further contains a Zr compound.
- the A1 compound and the Si compound contained in the processing solution for forming the upper layer film of the present invention need not be particularly specified, but are contained in the above-mentioned processing solution for underlayer film of the present invention already described.
- the same A1 compound and the above-mentioned S S compound can be used. Resin>
- acrylic resin alkyd resin, polyolefin resin, polyethylene resin, polypropylene resin, ethylene-propylene copolymer, styrene resin, acetic acid
- aqueous resins emulsion, dispersion, water-soluble
- vinyl resin epoxy resin, phenol resin, polyester resin, urethane resin and melamine resin
- the upper layer coating of the present invention may further contain a Zr compound.
- a Zr compound it may contain phosphoric acid and / or a phosphoric acid fermentation salt.
- the Zr compound and the phosphoric acid and / or phosphate contained in the treatment liquid for forming the insulating film need not be particularly specified, but are contained in the treatment liquid for the undercoat film of the present invention described above.
- the same Zr compound, phosphoric acid and phosphate as described above can be used.
- the upper layer coating of the present invention may contain other components and additives similar to the above-mentioned underlayer coating.
- the content is also the same as in the case where it is contained in the undercoat film.
- the additive is not more than about 10% by mass based on the total solid content of the insulating coating of the present invention. Amount of each compound added>
- the total solids weight of the upper film have preferably be 1 0% by mass or more.
- the upper limit is preferably 90% by mass or less.
- the lower limit is more preferably 15% by mass or more, and even more preferably 20% by mass or more.
- the upper limit is more preferably 85% by mass or less, and further preferably 80% by mass or less.
- the content of the Si compound contained in the upper layer coating of the present invention is preferably not less than 10% by mass in terms of SiO 2 based on the total solid content of the upper layer coating.
- the upper limit is preferably 90% by mass or less.
- a more preferred lower limit is 15% by mass or more, and a more preferred value is 20% by mass or more.
- a more preferred upper limit is 85% by mass or less, and further preferably 80% by mass or less.
- the content of the resin contained in the upper layer coating of the present invention is preferably 0.1% by mass or more.
- the upper limit is preferably 50% by mass or less.
- a more preferred lower limit is 1% by mass or more, and 5% by mass or more is more preferred.
- the upper limit is more preferably 45% by mass or less, and even more preferably 40% by mass or less.
- the content of the case where the upper film of the present invention to contain a Z r compound with Z r 0 2 terms have preferably be less 9 0% by weight of the total solids weight of the upper film.
- a more preferred upper limit is 80% by mass or less, and more preferably 70% by mass or less.
- the lower limit is not particularly set, the effect becomes relatively large when added at 20% by mass or more. Preferably, it is at least 30% by mass.
- Z r 0 Total 2 terms and P_ ⁇ 4-converted value the Z r preferred Z in the case of sole addition r amount (Z r 0 2 equivalent) to fall within the range Is preferred.
- the existence ratio of such as phosphoric acid and Z r compound it is preferable that the P 0 4 ZZ r 0 2 0. 4 0 from 0.0 1 at the exchange, and even more preferably from 0.3 or less.
- Z r compound or, if it contains Z r compounds and phosphoric acid and / or phosphoric acid salt, the ratio of A 1 compound and the S i compound, A 1 2 0 3 in terms of and with S i 0 2 conversion , 20:80 to 80:20 (mass ratio).
- the content of the A1 compound, the Si compound, and the resin contained in the upper layer coating of the present invention is in the above range, corrosion resistance, powder blowing resistance, strain relief, and scratch resistance after annealing. Is preferable because it can be achieved in a well-balanced manner.
- the Zr compound is further contained in the above content range, the film is further strengthened and the above properties are improved.
- total solid content mass of the upper layer coating is the same as in the case of the above-mentioned underlayer coating, and is the adhesion amount of the coating manufactured on the surface of the electromagnetic steel sheet after drying.
- the total solid mass of the upper coating can be obtained by measuring the weight loss after the coating is removed due to peeling off the force and subtracting the previously measured total solid mass of the base coating.
- the upper layer coating of the present invention can be produced by the same method as the above-mentioned underlayer coating. That is, an upper layer film can be manufactured on the surface of the underlayer film manufactured by the above-described method by a more specific method.
- the magnetic steel sheet on which the upper layer coating is formed according to the present invention is subjected to strain relief annealing, it may be the same as the above-described annealing method when only the base coating is formed.
- the adhesion amount of the underlying coating is from 0.04 to 4.0 g / m 2 is preferred.
- the underlying film becomes a thin insulating film, and cracks, which are considered to be the cause of deterioration of corrosion resistance, are not particularly likely to occur.
- Undercoat Adhesion amount of film is more preferably be 0. 0 0 5 g / m 2 or more, and even more preferably to a 0. 0 1 g / m 2 or more. Further, the content is more preferably 0.2 g // m 2 or less.
- an upper layer coating is very useful for securing insulation, and it is preferable to provide a thicker layer, for example, 0.2 gZm 2 or more, in order to seal flaws and defects in the base layer.
- the effect of improving the appearance can be seen by using a thin underlayer treatment.
- the upper layer is applied after the base is applied, Fe elution of the steel sheet, which is likely to occur with an aqueous treatment liquid, is suppressed, and the appearance is considered to be improved.
- the force S having extremely excellent film properties and the provision of another layer are not particularly limited without providing another insulating film layer on the upper layer film.
- a coating made of resin alone can be further provided for the purpose of further enhancing corrosion resistance and the like.
- the resin may be the same as that contained in the upper layer coating.
- the method of application and baking may be in accordance with the undercoat or the upper coat.
- Electromagnetic steel sheets having the respective insulating coatings shown in Tables 1 to 5 were manufactured by the following methods.
- Table 1 shows an example of a magnetic steel sheet provided with a single-layer insulating film
- Table 2 shows an example of a magnetic steel sheet provided with a two-layer insulating film having a predetermined upper layer film.
- Tables 3 and 4 show examples of electrical steel sheets with two layers of insulating coatings having various upper coatings.
- Table 5 shows the coating properties.
- the Zr compound, A1 compound, and Si compound are deionized water so that the composition of the insulating film (Table 1) or the composition of the undercoat film (Tables 2-4) shown in Tables 1 to 4 will be obtained.
- each of these processing solution thickness 0. 5 mm magnetic steel sheets (S i: 0. 2 5 mass 0/0) from the width 1 5 0 mm, the test piece cut to a size of length 3 0 O mm
- the surface was coated with a mouth coater and baked at an ultimate temperature of 230 ° C. by direct fire of propane gas, and then allowed to cool at room temperature to form an insulating film.
- the particle size of colloidal silica was about 3 to 8 nm.
- A1 compound, Si compound, resin, Zr compound, phosphoric acid and / or phosphate are represented by the composition of the upper layer coating shown in each table.
- Each treatment solution for the second layer was prepared by adding the solution to deionized water so as to obtain the same.
- an upper film was formed on the upper surface of the first layer (underlying film) under the conditions described in Tables 2 to 4. Conditions other than those described in each table were the same as those in the first layer.
- Tables 1 to 6 and FIGS. 1 and 2 show the heat resistance after baking (before strain relief annealing) and the scratch resistance after strain relief annealing, and the Zr compound for Invention Examples 1 to 6 and Comparative Examples 1 to 6 in Table 1. (relative to the total solid content by mass in the coating Z r 0 2 converted mass (%)) content is obtained by rearranging the relation between the.
- Tables 1, 2, 5, and FIGS. 1 and 2 all of the present inventions are excellent in appearance, corrosion resistance, powder blowing resistance, and scratch resistance of the strain relief annealing plate.
- the methods for evaluating the properties of each film are as follows. Appearance>
- Each test piece coated with each treatment liquid and provided with an insulating film was kept in a constant temperature and humidity chamber at a relative humidity of 98% and a temperature of 50 ° C for 2 days.
- the corrosion resistance was evaluated according to the following criteria.
- the ⁇ ⁇ area of ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ is the percentage of the sum of ⁇ generated area with respect to the total area of observation, and was visually determined.
- Test conditions The test piece was reciprocated in a state where the felt was pressed against one surface of the test piece provided with the insulating coating, and the rubbing trace after the test was observed to evaluate the peeling state and the powder blowing state of the coating. Contact surface width 2 0 X 1 0 mm of felt, pressing load heavy 3. And 8 kg / cm 2 (0. 4 MP a), reciprocating 4 0 0 m corresponding simple reciprocating, was repeated.
- Test conditions N 2 atmosphere, 7 5 0 ⁇ Hikitsu a 2 hour hold to annealed sample surface at the edge portion made by shearing the same steel plate-out at, the scratches, the degree of blown powder Judged.
- Tables 6 to 11 Electrical steel sheets having the respective insulating coatings shown in Tables 6 to 11 were manufactured by the following methods.
- Tables 6 and 7 show examples of magnetic steel sheets with a single-layer insulating film
- Tables 8 and 9 show examples of magnetic steel sheets with two layers of insulating film having a predetermined upper layer film.
- Table 10 shows examples of magnetic steel sheets provided with two layers of insulating coatings having various upper coatings, and Table 11 shows the coating properties.
- the Zr compound, phosphoric acid and / or phosphate, the A1 compound, and the Si compound are shown in Tables 6 to 10 as the insulating coating composition (Tables 6 and 7) or the undercoating composition (Tables 8 to 10).
- Tables 6 and 7 the insulating coating composition
- Tables 8 to 10 the undercoating composition
- the coating was applied by a single coater and baked at a baking temperature (attained temperature) shown in Tables 6 to 10 by direct fire of propane gas, and then allowed to cool at room temperature to form an insulating film.
- the A1 compound, Si compound, resin, Zr compound, phosphoric acid and Z or phosphate are shown in the upper layer coating composition shown in each table.
- Each of the treatment liquids for the second layer (upper layer coating) was prepared by adding the mixture to deionized water so as to obtain the desired treatment liquid.
- FIG. 3 shows the powder blowing resistance after baking (before strain relief annealing) and the abundance ratio of phosphoric acid (salt) and Zr compound for Invention Examples 68 to 72 and Comparative Examples 17 to 20 in Table 9. those were arranged the relationship between PO 4 reduced mass / Z r O 2 in terms of mass) ', also 04, Inventive examples 7 to 13 in Table 6 (phosphoric acid and / or phosphate added: closed circles) and The relationship between the powder blowing resistance after baking and the baking temperature is summarized for Invention Examples 14 to 20 (no addition: open triangles).
- composition resin (polyester) (solid content is 30O / 0 of total solid content mass of upper layer coating),
- Invention example 82 II II n II // I II II Ramin II II II Invention example S3 II n it II II II If II Urethane II ⁇ It Invention example 84 II 11 II II II ft // II Ethoxy II rr // Invention example Contact II II II 11 If II 11 Holly: t-ethylene 5 • If // Invention example 86 II II // 11 11 II II II 20 fl n Invention example 87 II "II ⁇ II t! If II Le 10 11 l! Invention example 88 II // n // II, / ff II II 20 II if
- an insulating coating containing an inorganic substance substantially free of chromium as a main component after baking even when manufactured by applying and baking at a temperature of 300 ° C. or less, or even 200 ° C. or less. It is possible to provide a magnetic steel sheet with an insulating coating which is excellent in corrosion resistance (before strain relief annealing) and powder blowing resistance, appearance, and scratch resistance after strain relief annealing.
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Abstract
Description
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JP2004-080990 | 2004-03-19 | ||
JP2004080990A JP4461861B2 (ja) | 2004-03-19 | 2004-03-19 | クロムフリー絶縁被膜付き電磁鋼板 |
JP2004361379A JP4725094B2 (ja) | 2004-12-14 | 2004-12-14 | 絶縁被膜付き電磁鋼板 |
JP2004361378A JP4552642B2 (ja) | 2004-12-14 | 2004-12-14 | 絶縁被膜付き電磁鋼板 |
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Cited By (2)
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EP2186924A4 (en) * | 2007-08-30 | 2015-06-03 | Jfe Steel Corp | SOLUTION FOR TREATING THE INSULATED COATING FILM OF ORIENTED ELECTROMAGNETIC STEEL PLATE AND METHOD FOR PRODUCING ORIENTED ELECTROMAGNETIC STEEL PLATE WITH THE INSULATED COATING FILM |
EP3000915A4 (en) * | 2013-05-23 | 2016-06-22 | Jfe Steel Corp | ELECTROMAGNETIC STEEL SHEET ON WHICH IS ATTACHED AN INSULATING COATING FILM |
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PL2366810T3 (pl) * | 2008-11-27 | 2019-12-31 | Nippon Steel Corporation | Blacha elektrotechniczna i sposób jej wytwarzania |
JP5589639B2 (ja) * | 2010-07-22 | 2014-09-17 | Jfeスチール株式会社 | 半有機絶縁被膜付き電磁鋼板 |
US10604848B2 (en) * | 2014-12-26 | 2020-03-31 | Nippon Steel Corporation | Electrical steel sheet |
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JPS6110963B2 (ja) * | 1978-05-31 | 1986-04-01 | Kawasaki Steel Co | |
JPH06287765A (ja) * | 1993-04-02 | 1994-10-11 | Nippon Steel Corp | 方向性電磁鋼板の張力被膜形成方法 |
JP2670155B2 (ja) * | 1989-10-17 | 1997-10-29 | 川崎製鉄株式会社 | 磁気特性の極めて良好な一方向性けい素鋼板の製造方法 |
JP2000034576A (ja) * | 1998-05-15 | 2000-02-02 | Toyobo Co Ltd | 金属表面処理剤および表面処理金属材料並びに樹脂塗装金属材料 |
JP2003286580A (ja) * | 2002-03-28 | 2003-10-10 | Nippon Steel Corp | 密着性に優れた方向性電磁鋼板の絶縁皮膜形成方法 |
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2005
- 2005-03-14 KR KR1020067019234A patent/KR100816695B1/ko active IP Right Grant
- 2005-03-14 WO PCT/JP2005/004879 patent/WO2005090636A1/ja active Application Filing
- 2005-03-18 TW TW094108335A patent/TWI297363B/zh active
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JPS6110963B2 (ja) * | 1978-05-31 | 1986-04-01 | Kawasaki Steel Co | |
JP2670155B2 (ja) * | 1989-10-17 | 1997-10-29 | 川崎製鉄株式会社 | 磁気特性の極めて良好な一方向性けい素鋼板の製造方法 |
JPH06287765A (ja) * | 1993-04-02 | 1994-10-11 | Nippon Steel Corp | 方向性電磁鋼板の張力被膜形成方法 |
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EP2186924A4 (en) * | 2007-08-30 | 2015-06-03 | Jfe Steel Corp | SOLUTION FOR TREATING THE INSULATED COATING FILM OF ORIENTED ELECTROMAGNETIC STEEL PLATE AND METHOD FOR PRODUCING ORIENTED ELECTROMAGNETIC STEEL PLATE WITH THE INSULATED COATING FILM |
EP3000915A4 (en) * | 2013-05-23 | 2016-06-22 | Jfe Steel Corp | ELECTROMAGNETIC STEEL SHEET ON WHICH IS ATTACHED AN INSULATING COATING FILM |
RU2630723C2 (ru) * | 2013-05-23 | 2017-09-12 | ДжФЕ СТИЛ КОРПОРЕЙШН | Лист электротехнической стали с изоляционным покрытием |
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KR20060129480A (ko) | 2006-12-15 |
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