WO2010010836A1 - 無方向性電磁鋼板及びその製造方法 - Google Patents
無方向性電磁鋼板及びその製造方法 Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
- B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt 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
- 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
- C23C28/02—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 only including layers of metallic material
- C23C28/021—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 only including layers of metallic material including at least one metal alloy layer
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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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- 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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
Definitions
- the present invention relates to a non-oriented electrical steel sheet suitable for an iron core material for electrical equipment and a method for manufacturing the same.
- low-loss electromagnetic steel sheets have been used for small general-purpose motors and compressor motors.
- the magnetization characteristics in a low magnetic field of about 1.0 T or less are improved mainly by improving the purity and coarsening the crystal grains.
- An object of the present invention is to provide a non-oriented electrical steel sheet that can further improve the magnetic properties in a low magnetic field and a method for producing the same.
- the present invention has been made to solve the above-mentioned problems, and the gist thereof is as follows.
- a non-oriented electrical steel sheet comprising an Fe-Ni alloy film.
- the base material contains, by mass%, C: 0.05% or less, Si: 0.1% or more and 7.0% or less, Al: 0.01% or more and 7.0% or less, and the balance The non-oriented electrical steel sheet according to (1) or (2), wherein is composed of Fe and inevitable impurities.
- An Fe—Ni alloy film containing Fe: 10% to 40% and Ni: 60% to 90% by mass% is formed on at least one surface of the substrate with a thickness of 0.1 ⁇ m or more.
- the manufacturing method of the non-oriented electrical steel sheet characterized by having a process.
- the base material contains, by mass%, C: 0.05% or less, Si: 0.1% or more and 7.0% or less, Al: 0.01% or more and 7.0% or less, and the balance
- the method for producing a non-oriented electrical steel sheet according to (5) or (6) characterized in that comprises Fe and unavoidable impurities.
- the magnetic domain on the surface of the substrate is appropriately controlled by the action of an appropriate Fe—Ni alloy film, the magnetic properties can be improved.
- FIG. 1 is a diagram showing magnetic characteristics in a low magnetic field region.
- FIG. 2 is a diagram showing the relationship between the frequency and the iron loss improvement rate.
- FIG. 3 is a diagram showing the relationship between the Ni content and the relative permeability.
- FIG. 4 is a diagram showing the relationship between the thickness of the Fe—Ni alloy film and the relative magnetic permeability.
- FIG. 5 is a cross-sectional view showing the structure of the non-oriented electrical steel sheet according to the embodiment of the present invention.
- FIG. 6 is a cross-sectional view showing the structure of a non-oriented electrical steel sheet according to another embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing the structure of a non-oriented electrical steel sheet according to still another embodiment of the present invention.
- the inventors of the present application coat the base material of the non-oriented electrical steel sheet with a Fe—Ni alloy film so that the magnetic domains near the surface of the non-oriented electrical steel sheet are in a direction parallel to the surface. I found out that they were all right. As a result, it has also been found that the magnetization characteristics in a low magnetic field (for example, about 0.8 T) are improved. Improvement of magnetization characteristics in a low magnetic field can contribute to, for example, energy saving of electrical equipment.
- the unit of element content is mass% or mass ppm.
- the inventors of the present application formed an Fe-78% Ni alloy film on one side of a non-oriented electrical steel sheet (base material) by a sputtering method. That is, one side of the non-oriented electrical steel sheet was covered with an Fe-78% Ni alloy film.
- the non-oriented electrical steel sheet contains C: 0.002%, Si: 3.0%, and Al: 0.5%, with the balance being Fe and unavoidable impurities, with a thickness of 0.35 mm. A thing was used.
- the thickness of the Fe-78% Ni alloy film was 0.4 ⁇ m.
- the direct-current magnetization characteristic was measured. In the measurement of the direct current magnetization characteristic, the relationship between the maximum magnetic flux density Bm (0.4T to 1.6T) and the relative permeability ⁇ s was obtained. At this time, the relative permeability ⁇ s was measured in the rolling direction. For comparison, the same measurement was performed on a non-oriented electrical steel sheet in which no Fe-78% Ni alloy film was formed.
- the non-oriented electrical steel sheet on which the Fe-78% Ni alloy film is formed has a relative magnetic permeability at a low magnetic field as compared with the case where the Fe-78% Ni alloy film is not formed. ⁇ s became high. That is, the magnetic characteristics at a low magnetic field were improved.
- the maximum magnetic flux density Bm is about 0.8T
- the relative permeability ⁇ s is maximized.
- the relative permeability when the maximum magnetic flux density Bm is 0.8 T is a relative permeability obtained from a DC magnetization curve where the maximum magnetic flux density is 0.8 T.
- the inventors of the present application show the relationship between the frequency (20 Hz to 400 Hz) and the iron loss W 1 when the maximum magnetic flux density Bm is 1.5T. Asked. Further, for a non-oriented electrical steel sheet in which no Fe-78% Ni alloy film was formed, the relationship between the frequency (20 Hz to 400 Hz) and the iron loss W 2 when the maximum magnetic flux density Bm was 1.5 T was determined. These comparisons were made.
- FIG. 2 shows the relationship between the frequency and the iron loss improvement rate.
- the iron loss improvement rate was 15% or more at a frequency of 400 Hz or less.
- the formation of the Fe-78% Ni alloy film improves the relative magnetic permeability ⁇ s and reduces the iron loss (hysteresis loss).
- the iron loss with a maximum magnetic flux density of 1.5 T and a frequency of 50 Hz is written as W15 / 50.
- an Fe—Ni alloy film suitable for improving magnetic properties the present inventors have formed Fe——of various compositions (Ni: 0% to 100%) on one side of a non-oriented electrical steel sheet.
- a Ni alloy film was formed by electroplating. That is, one side of the non-oriented electrical steel sheet was coated with an Fe—Ni alloy film having a different composition.
- the non-oriented electrical steel sheet contains C: 0.003%, Si: 2.1%, and Al: 0.3%, the balance is made of Fe and inevitable impurities, and the thickness is 0.35 mm. A thing was used.
- the thickness of the Fe—Ni alloy film was 0.3 ⁇ m in any composition.
- the direct-current magnetization characteristic was measured. In the measurement of the direct current magnetization characteristics, the maximum magnetic flux density Bm was set to 0.8 T, and the relationship between the Ni content and the relative permeability ⁇ s was obtained. The result is shown in FIG.
- the relative magnetic permeability ⁇ s was maximized when the Ni content was about 78.5%.
- the composition of Fe-78.5% Ni is a permalloy composition having high magnetic permeability.
- the Ni content is less than 60%, particularly when it is less than 50%, the relative permeability ⁇ s is low.
- the relative permeability ⁇ s was low. Such a tendency is considered to occur because the composition having a Ni content of less than 60% or more than 90% is largely different from the permalloy composition.
- the present inventors have various thicknesses (0.05 ⁇ m to 0.8 ⁇ m) on one side of the non-oriented electrical steel sheet.
- An Fe—Ni alloy film was formed by a dip plating method. That is, one side of the non-oriented electrical steel sheet was coated with an Fe—Ni alloy film having a different thickness.
- a non-oriented electrical steel sheet it contains C: 0.003%, Si: 2.4%, and Al: 0.5%, the balance is made of Fe and inevitable impurities, and the thickness is 0.35 mm. A thing was used. Further, the Ni content in the Fe—Ni alloy film was 78% in any thickness. And the direct-current magnetization characteristic was measured.
- the maximum magnetic flux density Bm was set to 0.8 T, and the relationship between the thickness of the Fe—Ni alloy film (coating thickness) and the relative permeability ⁇ s was obtained. Further, the same measurement was performed on the Fe—Ni alloy film formed on both sides of the non-oriented electrical steel sheet.
- the relative permeability ⁇ s becomes extremely low because the magnetic domains on the surface of the non-oriented electrical steel sheet are not easily aligned even by the formation of the Fe—Ni alloy film. It is.
- the effect of improving the relative permeability ⁇ s is saturated if the magnetic domains on the surface of the non-oriented electrical steel sheet are sufficiently aligned, and even if an Fe—Ni alloy film is formed further, the magnetic domains are less likely to be aligned. Because it becomes.
- the relative permeability ⁇ s when the Fe—Ni alloy film was formed on one side and the relative permeability ⁇ s when formed on both sides were equal to each other.
- the magnetic flux concentrates in the region that is most easily magnetized in the thickness direction of the non-oriented electrical steel sheet during excitation. That is, even if the Fe—Ni alloy film is formed in one region (one side) in the thickness direction or the Fe—Ni alloy film is formed in two regions (both sides), the region where the magnetic flux is most concentrated. This is because there is one.
- the present inventors have found that the relative permeability and iron loss are drastically improved by forming a Fe—Ni alloy film on the surface of a non-oriented electrical steel sheet.
- the Ni content of the Fe—Ni alloy film is 60% to 90%, and the thickness of the Fe—Ni alloy film is 0.1 ⁇ m or more. It was also found that is necessary.
- the inventors of the present application show that when the thickness of the Fe—Ni alloy film exceeds 0.6 ⁇ m, the effect of improving the relative magnetic permeability and iron loss is saturated, and the Fe—Ni alloy film is formed on one side. It has also been found that the effects of improving the relative permeability and iron loss are equal to each other even if they are formed on both sides.
- the C content is preferably 0.05% or less.
- Si is an element effective for increasing electrical resistance, and if the Si content is less than 0.1%, it is difficult to obtain sufficient specific resistance. On the other hand, if the Si content exceeds 7%, the cold rolling property is remarkably lowered. Therefore, the Si content is preferably 0.1% or more and 7% or less.
- Al like Si, is an element that is effective in increasing electrical resistance.
- Al is an element that contributes to deoxidation.
- the Al content is less than 0.01%, it is difficult to perform sufficient deoxidation.
- the Al content exceeds 7%, the castability is lowered and the productivity is likely to be lowered. Therefore, the Al content is preferably 0.01% or more and 7% or less.
- non-oriented electrical steel sheet base material
- content ratios of Mn, Ti, N, S, Sn, Cu, and Ni are preferably within the following ranges.
- Mn generates MnS and has the effect of detoxifying S as an impurity. For this reason, it is preferable that 0.1% or more of Mn is contained. However, even if it contains more than 1.0%, the effect
- Ti produces nitrides and / or carbides, deteriorating magnetization characteristics and iron loss. For this reason, it is preferable that the content rate of Ti is 30 ppm or less, and it is more preferable that it is 15 ppm or less.
- N generates AlN and / or TiN and deteriorates the magnetization characteristics. For this reason, it is preferable that the content rate of N is 0.0030% or less.
- the content rate of S is 30 ppm or less.
- Sn, Cu, and Ni have an effect of suppressing the suppression of nitriding and oxidation of the surface of the non-oriented electrical steel sheet during annealing, particularly strain relief annealing, and an effect of improving excitation characteristics by improving the texture.
- Sn, Cu and Ni are contained in a total amount of 0.01% or more. Since these actions are equivalent among Sn, Cu, and Ni, it is sufficient that at least one of them is included. However, even if the total content is more than 0.50%, the effect of suppressing nitriding and oxidation by the atmospheric gas during annealing and the effect of improving the texture are saturated.
- the Fe—Ni alloy film is preferably composed of Fe: 10% to 40% and Ni: 90 to 60%, and more preferably composed of Fe: 15% to 30% and Ni: 85% to 70%. This is to obtain good magnetic characteristics in a low magnetic field.
- the Fe—Ni alloy film may contain other metal elements such as Mo.
- the Fe—Ni alloy film preferably contains Fe: 10% to 40% and Ni: 90 to 60%, and contains Fe: 15% to 30% and Ni: 85% to 70%. Is more preferable.
- the method for forming the Fe—Ni alloy film on the surface of the non-oriented electrical steel sheet (base material) is not particularly limited.
- PVD physical vapor deposition
- CVD chemical vapor
- a dry coating method such as a deposition method
- a wet coating method such as a plating method.
- the thickness of the Fe—Ni alloy film is 0.1 ⁇ m or more. This is because a sufficient effect cannot be obtained when the thickness is less than 0.1 ⁇ m as described above. On the other hand, if the thickness of the Fe—Ni alloy film exceeds 0.6 ⁇ m, the effect of improving the magnetic permeability and iron loss is saturated, so that the thickness of the Fe—Ni alloy film is sufficient to be 0.6 ⁇ m or less. However, it may exceed 0.6 ⁇ m for reasons such as operational stability.
- the Fe—Ni alloy film is formed on one surface of the non-oriented electrical steel sheet (base material), but it may be formed on both surfaces.
- the relative permeability ⁇ s in the rolling direction shows a maximum value at a maximum magnetic flux density Bm of about 0.8T, The value was 10,000 or more. Therefore, if the above-mentioned minimum conditions are satisfied, it is considered that a relative permeability ⁇ s of 10,000 or more can be obtained with a maximum magnetic flux density Bm of 0.8T.
- the iron loss was improved by 15% or more by the formation of the Fe—Ni alloy film at a frequency of 400 Hz or less. Therefore, it is considered that the iron loss is improved by 10% or more by the formation of the Fe—Ni alloy film in any direction as long as the above-mentioned minimum conditions are satisfied.
- the manufacturing method of the non-oriented electrical steel sheet as the base material is not particularly limited, and can be manufactured according to a conventional method.
- the thickness after cold rolling may be set to 0.10 mm to 0.80 mm according to required characteristics.
- the temperature of the finish annealing may be adjusted in a range of 700 ° C. to 1100 ° C. according to required characteristics.
- strain relief annealing may be performed after punching of the motor core or the like.
- an insulating film is formed on the surface after finish annealing, but the Fe—Ni alloy film may be formed after the formation of this insulating film. Further, an Fe—Ni alloy film may be formed before forming this insulating film.
- the non-oriented electrical steel sheet according to the embodiment of the present invention has a structure shown in FIG. That is, the Fe—Ni alloy film 2 is formed on the surface or both surfaces of the substrate 1. As shown in FIG. 6, an insulating film 3 may be formed between the substrate 1 and the Fe—Ni alloy film 2, and as shown in FIG. 7, the insulating film 3 is formed on the Fe—Ni alloy film 2. May be formed.
- a sample having a Fe—Ni alloy film thickness of 0.1 ⁇ m or more has a high relative magnetic permeability ⁇ s of 10,000 or more. Further, in the sample having the Fe—Ni alloy film thickness of less than 0.1 ⁇ m, the relative permeability ⁇ s was as low as less than 10,000. Further, the effect was saturated when the thickness of the Fe—Ni alloy film exceeded 0.6 ⁇ m.
- An Fe—Ni alloy film having the composition shown in Table 3 was formed on one side of the non-oriented electrical steel sheet (base material) after finish annealing and before forming an insulating film by the immersion plating method. That is, the Fe—Ni alloy film was applied to one side of the non-oriented electrical steel sheet.
- the non-oriented electrical steel sheet contains C: 0.01%, Si: 2.5%, and Al: 4.5%, the balance is made of Fe and inevitable impurities, and the thickness is 0.50 mm. A thing was used. The thickness of the Fe—Ni alloy film was 0.4 ⁇ m. Next, an insulating film was formed on the entire surface of the non-oriented electrical steel sheet.
- the relative permeability ⁇ s was 10,000 or more in all the samples in which the Fe—Ni alloy film was formed. Further, the iron loss improvement rate was as high as 10% or more in the sample in which the Ni content in the Fe—Ni alloy film was 70% to 85%.
- the present invention can be used for non-oriented electrical steel sheets used for motors and the like.
Abstract
Description
(2)前記Fe-Ni合金膜の厚さが0.6μm以下であることを特徴とする(1)に記載の無方向性電磁鋼板。
(3) 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする(1)又は(2)に記載の無方向性電磁鋼板。
(4)前記基材の表面に形成された絶縁膜を有することを特徴とする(1)~(3)のいずれか一つに記載の無方向性電磁鋼板。
(6) 前記Fe-Ni合金膜の厚さが0.6μm以下であることを特徴とする(5)に記載の無方向性電磁鋼板の製造方法。
(7) 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする(5)又は(6)に記載の無方向性電磁鋼板の製造方法。
(8) 前記Fe-Ni合金膜を形成する工程の前に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする(5)~(7)のいずれか一つに記載の無方向性電磁鋼板の製造方法。
(9) 前記Fe-Ni合金膜を形成する工程の後に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする(5)~(7)のいずれか一つに記載の無方向性電磁鋼板の製造方法。
鉄損改善率(%)=100×(1-W1/W2)
deposition)法等のドライコーティング法、並びにメッキ法等のウェットコーティング法等により形成することができる。
仕上焼鈍後で絶縁膜を形成する前の無方向性電磁鋼板(基材)の片面又は両面に、表1に示す組成のFe-Ni合金膜を電気メッキ法により形成した。つまり、無方向性電磁鋼板の片面又は両面をFe-Ni合金膜に塗布した。無方向性電磁鋼板としては、C:0.002%、Si:3.2%、及びAl:1.0%を含有し、残部がFe及び不可避的不純物からなり、厚さが0.35mmのものを用いた。また、Fe-Ni合金膜の厚さは片面当たり0.5μmとした。次いで、無方向性電磁鋼板の全面に絶縁膜を形成した。そして、最大磁束密度Bmが0.8Tのときの圧延方向の比透磁率μsを測定した。この結果を表1に示す。
仕上焼鈍後で絶縁膜を形成する前の無方向性電磁鋼板(基材)の片面に、表2に示す厚さのFe-78%Ni合金膜をPVD法により形成した。つまり、無方向性電磁鋼板の片面にFe-78%Ni合金膜を塗布した。無方向性電磁鋼板としては、C:0.001%、Si:4.5%、及びAl:3.5%を含有し、残部がFe及び不可避的不純物からなり、厚さが0.30mmのものを用いた。次いで、無方向性電磁鋼板の全面に絶縁膜を形成した。そして、最大磁束密度Bmが0.8Tのときの圧延方向の比透磁率μsを測定した。この結果を表2に示す。
仕上焼鈍後で絶縁膜を形成する前の無方向性電磁鋼板(基材)の片面に、表3に示す組成のFe-Ni合金膜を浸漬メッキ法により形成した。つまり、無方向性電磁鋼板の片面にFe-Ni合金膜を塗布した。無方向性電磁鋼板としては、C:0.01%、Si:2.5%、及びAl:4.5%を含有し、残部がFe及び不可避的不純物からなり、厚さが0.50mmのものを用いた。また、Fe-Ni合金膜の厚さは0.4μmとした。次いで、無方向性電磁鋼板の全面に絶縁膜を形成した。そして、最大磁束密度Bmが0.8Tのときの圧延方向の比透磁率μsを測定した。更に、鉄損W15/50(最大磁束密度Bmが1.5T、かつ周波数が50Hzのときの鉄損)も測定した。これらの結果を表3に示す。
Claims (16)
- 基材と、
前記基材の少なくとも一方の表面に形成され、質量%で、Fe:10%~40%及びNi:60%~90%を含有し、厚さが0.1μm以上のFe-Ni合金膜と、
を有することを特徴とする無方向性電磁鋼板。 - 前記Fe-Ni合金膜の厚さが0.6μm以下であることを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする請求項2に記載の無方向性電磁鋼板。
- 前記基材の表面に形成された絶縁膜を有することを特徴とする請求項1に記載の無方向性電磁鋼板。
- 前記基材の表面に形成された絶縁膜を有することを特徴とする請求項2に記載の無方向性電磁鋼板。
- 前記基材の表面に形成された絶縁膜を有することを特徴とする請求項3に記載の無方向性電磁鋼板。
- 前記基材の表面に形成された絶縁膜を有することを特徴とする請求項4に記載の無方向性電磁鋼板。
- 基材の少なくとも一方の表面に、質量%で、Fe:10%~40%及びNi:60%~90%を含有するFe-Ni合金膜を0.1μm以上の厚さで形成する工程を有することを特徴とする無方向性電磁鋼板の製造方法。
- 前記Fe-Ni合金膜の厚さが0.6μm以下であることを特徴とする請求項9に記載の無方向性電磁鋼板の製造方法。
- 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする請求項9に記載の無方向性電磁鋼板の製造方法。
- 前記基材は、質量%で、C:0.05%以下、Si:0.1%以上7.0%以下、Al:0.01%以上7.0%以下を含有し、残部がFe及び不可避的不純物からなることを特徴とする請求項10に記載の無方向性電磁鋼板の製造方法。
- 前記Fe-Ni合金膜を形成する工程の前に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする請求項9に記載の無方向性電磁鋼板の製造方法。
- 前記Fe-Ni合金膜を形成する工程の後に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする請求項9に記載の無方向性電磁鋼板の製造方法。
- 前記Fe-Ni合金膜を形成する工程の前に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする請求項10に記載の無方向性電磁鋼板の製造方法。
- 前記Fe-Ni合金膜を形成する工程の後に、前記基材の表面に絶縁膜を形成する工程を有することを特徴とする請求項10に記載の無方向性電磁鋼板の製造方法。
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US20130022833A1 (en) * | 2011-07-22 | 2013-01-24 | GM Global Technology Operations LLC | Electromagnetic machine and system including silicon steel sheets |
CN103305748A (zh) * | 2012-03-15 | 2013-09-18 | 宝山钢铁股份有限公司 | 一种无取向电工钢板及其制造方法 |
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JP6341281B2 (ja) | 2014-07-02 | 2018-06-13 | 新日鐵住金株式会社 | 無方向性電磁鋼板及びその製造方法 |
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US11946121B2 (en) | 2017-07-28 | 2024-04-02 | Jfe Steel Corporation | Steel sheet for battery outer tube cans, battery outer tube can and battery |
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