JP4145223B2 - Thin metal plate and manufacturing method thereof - Google Patents

Description

  The present invention relates to a magnetic metal sheet provided with a polymer compound layer and a method for producing the same.

Conventionally, when a magnetic metal material is used as a thin plate, a plurality of single-plate thin plates have been stacked. For example, when an amorphous metal ribbon is used as the magnetic metal material, the thickness is about 10 to 50 μm, so a specific adhesive is uniformly applied to the surface of the amorphous metal ribbon. It is applied to and laminated. In Japanese Patent Application Laid-Open No. 58-175654 (Patent Document 1), amorphous metal ribbons coated with an adhesive mainly composed of a high heat-resistant polymer compound are stacked, pressure-bonded by a rolling roll, and heat-bonded. It describes about the manufacturing method of the laminated body characterized by this.
When a plurality of amorphous metal ribbons are stacked and stacked, there may be a case where stacking deviation occurs in the stacked body. When such a laminating deviation occurs, the dimensional stability is poor and is not preferable, so that it may be difficult to apply to magnetic application products such as a magnetic core and a motor core. In addition, when using shearing cutting to cut an amorphous metal ribbon into a rectangle, when the metal ribbon is pressed down, the metal ribbon will be displaced and the dimensional stability of the cut shape will deteriorate. was there. These problems have been obstacles to application to various magnetic application products.
These problems are that when an adhesive such as a polymer compound is used to laminate the metal and metal, the metal shrinks due to the difference in thermal shrinkage due to the difference in expansion coefficient between the metal and the polymer compound. Possible cause. Japanese Patent Application Laid-Open No. 64-80534 (Patent Document 2) discloses a curl correction and dimensional stability improvement method for a long flexible thin metal laminate made of a polymer and a metal foil. On the curved surface of the first bar provided at an angle of ˜80 degrees, a curl correction and a dimensional stability improvement method using a process in which a metal foil is slid in the longitudinal direction in a tension state have been proposed. However, when a material such as an amorphous metal material is used, the surface of the amorphous metal has irregularities and friction is large, and if the amorphous metal ribbon has an edge, the ribbon is easily damaged. It is not preferable from the point.
JP 58-175654 A Japanese Unexamined Patent Publication No. 64-80534

  Therefore, an object of the present invention is to solve the stacking misalignment of the laminated body and the decrease in dimensional stability during pressing during shearing cutting. It is another object of the present invention to provide a method for suppressing the maximum warpage rate, which is an important factor for preventing stacking deviation, even for a fragile metal.

  As a result of diligent research, the present inventors have specified in JIS C 6481 of a thin metal sheet provided with a resin layer against stacking deviation or cutting deviation during shearing when the laminate is used for applications such as a magnetic core. We found that the maximum warpage rate is an important correlation factor.

  That is, the present invention is a metal thin plate provided with a polymer compound layer, and a maximum warpage rate represented by a ratio of a maximum warpage amount to a length of a sample piece of a maximum warpage portion measured based on JIS C 6481. Is a metal thin plate characterized by being 10% or less.

  The present invention provides a laminate using such a metal thin plate.

  As the metal thin plate of the present invention, it is preferable to use an amorphous metal, and the laminate using the amorphous metal thin plate having a maximum warpage rate of 10% or less of the metal thin plate has no stacking deviation, Moreover, since there is no shift at the time of cutting, an amorphous metal laminate magnetic core is provided.

  The metal thin plate can be produced by applying a liquid polymer compound to the metal thin plate, and removing the solvent while curving the coated surface as an outer surface.

  As a preferred embodiment of the above production method, there is a method in which a curing reaction is caused by using a resin that cures when reacted as the polymer, while curving the coating surface and removing the solvent as an outer surface, or after removing the solvent. I can do it. It is preferable to use a thermoplastic resin as the polymer. Also, polyamide varnish can be mentioned as a resin that hardens upon reaction. The polyamide varnish can be used with an imidized resin after removing the solvent.

  By the method of the present invention, the maximum warpage rate specified by JIS C 6481 was set to 10% or less, and a remarkable improvement effect was found in stacking shift and cutting shift during shearing, and the present invention was achieved.

(Magnetic metal sheet)
The metal magnetic material used in the present invention can be any known metal magnetic material. Specific examples include silicon steel plates, permalloy, nanocrystalline metal magnetic materials, and amorphous metal magnetic materials that have been put into practical use with a silicon content of 3% to 6.5%. In particular, extremely thin, amorphous metal magnetic materials and nanocrystalline metal magnetic materials with a plate thickness of about 10 μm to 50 μm are easily deformed by external force, and are easily warped due to curing shrinkage of the resin when applied to the resin. Misalignment and cutting misalignment during shearing were likely to occur. It is used suitably by setting it as the curvature rate of this invention.

(Polymer compound)
As the polymer compound used in the present invention, a known so-called resin is used. In particular, when heat treatment at 200 ° C. or higher is required to improve the magnetic properties of the metal magnetic material, it is effective to combine a heat-resistant resin having a low elastic modulus to exhibit excellent performance. In addition, in materials such as silicon steel plates that have a large loss and a high heat generation temperature compared to amorphous metal magnetic materials and nanocrystalline metal magnetic materials, heat-resistant resins can be used in power electronics applications such as motors and transformers. The rated temperature can be improved, leading to improved rated output and downsizing of the equipment. The heat-resistant resin used in the present invention may be heat-treated at an optimum heat treatment temperature that improves the magnetic properties of the amorphous metal ribbon or the nanocrystalline metal magnetic ribbon, so that the material is less thermally decomposed at the heat treatment temperature. Must be selected. For example, the heat treatment temperature of the amorphous metal ribbon varies depending on the composition of the amorphous metal ribbon and the intended magnetic properties, but the temperature for improving the good magnetic properties is generally in the range of 200 to 700 ° C. More preferably, it is the range of 300 degreeC-600 degreeC.

  Examples of the heat resistant resin used in the present invention include thermoplastic, non-thermoplastic, and thermosetting resins. Among these, the use of a thermoplastic resin is preferable because it causes less curing shrinkage and less warpage of the metal ribbon.

  The heat-resistant resin used in the present invention has a weight loss measured using DTA-TG when dried at 120 ° C. for 4 hours as a pretreatment and then kept at 300 ° C. for 2 hours in a nitrogen atmosphere. Usually, 1% or less, preferably 0.3% or less is used. Specific resins include polyimide resins, silicon-containing resins, ketone resins, polyamide resins, liquid crystal polymers, nitrile resins, thioether resins, polyester resins, arylate resins, sulfone resins, Examples thereof include imide resins and amide imide resins. Of these, it is preferable to use polyimide resins, sulfone resins, and amideimide resins.

  Further, in the present invention, when heat resistance of 200 ° C. or higher is not required, the present invention is not limited to this, but specific examples of the thermoplastic resin used in the present invention include polyethersulfone, polyetherimide, polyether There are ketone, polyethylene terephthalate, nylon, polybutylene terephthalate, polycarbonate, polyphenylene ether, polyphenylene sulfide, polysulfone, polyamide, polyamideimide, polylactic acid, polyethylene, polypropylene, etc. Among them, polyethersulfone, polyetherimide are desirable. Polyetherketone polyethylene, polypropylene, epoxy resin, silicone resin, rubber-based resin (chloroprene rubber, silicone rubber) and the like can be used.

(Warpage amount)
The maximum warpage rate W1 (%) defined in the present invention is measured by a method according to JIS C 6481, and the formula W1 = (D1 / L1) × 100 (where D1: maximum warpage amount (mm), L1: maximum warpage) It can be calculated from the sample piece length (mm) of the portion.

In the present invention, the evaluation test piece size was a rectangle of 100 mm × 30 mm, and was cut so that the longitudinal direction of the metal thin plate was parallel to the long side 100 mm of the evaluation test piece.
As a result of experiments, it has been clarified that when the maximum amount of warp defined by JIS C 6481 is 10% or less, stacking deviation and reduction in dimensional stability during shearing cutting can be suppressed.

  More preferably, the maximum warpage amount is 5% or less.

  More preferably, the maximum warpage rate is 1% or less.

(Coating method)
Although an example of the manufacturing method for implement | achieving the maximum curvature amount prescribed | regulated by this invention is described below, it is not limited to this manufacturing method. The magnetic metal thin plate “laminate” of the present invention is prepared by first forming a coating film of a resin varnish in which a resin is dissolved in an organic solvent on a thin plate by a coating device such as a roll coater on the magnetic metal thin plate. And can be prepared by a method of applying a polymer compound to the amorphous metal ribbon. The resin varnish as used herein refers to a liquid in which a resin or a resin precursor is dispersed or dissolved in an organic solvent. The amount of coating varies depending on the type of metal sheet and polymer compound used, but when the resin shrinks during drying or curing, the stress generated between the sheet metal and the resin is balanced and does not warp. This is very important. The coating thickness of the varnish coating to be coated is usually preferably about 0.1 μm to 1 mm.

At this time, when the resin shrinks during drying or curing, stress is generated between the thin metal and the resin, and warpage occurs. In the present invention, it has been found that the following method is effective as a method for suppressing the warpage. That is,
(A) The varnish coating film to be coated is thinly applied to about 0.1 μm to 1 mm.

  (B) When the resin layer is dried and cured, a force is applied in the direction opposite to the direction in which the metal thin warps, and after the drying is completed, this force is released at room temperature so that the stress between the metal and the resin becomes a balanced plane. Is to do.

  (D) Even after the resin layer is dried and cured, the warp can be kept within the range of the maximum warpage rate of the present invention by warping in the opposite direction to the warp and reducing the warp.

  These methods may be used alone or in combination of two or more.

  The viscosity of the resin varnish is preferably in a concentration range of 0.005 to 200 Pa · s so that the thickness of the resin layer is uniform. Furthermore, a concentration range of 0.01 to 50 Pa · s is preferable, and a range of 0.05 to 5 Pa · s is more preferable. And the thickness of the resin layer of this invention is the range of 0.1 micrometer-1 mm normally, Preferably it is 0.5 micrometer-10 micrometers, More preferably, 1 micrometer-6 micrometers are good. For this purpose, the thickness of the varnish coating film is set to about 0.1 to 1 mm.

More specifically, it can be produced as follows. That is, a warp correction roll is installed on the downstream side of the coating portion between the roll portion 2 that has fed out the magnetic metal thin plate and the winding roll portion 6. Warp correcting roll, because it has an elliptical sphere structure, bending the Riko computing surface by the bringing along the magnetic metal thin plate such that the outside. Depending on the nature of the polymer compound used, for example, by using a resin such as cured by reaction, heating the warp rolls, by cooling, or to remove the solvent, Ya reaction of the thermosetting or the like if necessary It can be used for imidization reaction of polyamide.

  Next, an example will be described.

(Example 1)
As the metal thin plate, an amorphous metal ribbon having a composition of Fe ₇₈ B ₁₃ Si ₉ (atomic%) having a width of about 142 mm and a thickness of about 25 μm, manufactured by Honeywell, Metglas: 2605TCA (trade name) was used. When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid. At this time, when drying and heating at 140 ° C. and 260 ° C., the thin metal plate coated with the resin was rolled in the width direction to the side opposite to the resin surface, and the state was maintained until the temperature was returned to room temperature. As a result, the maximum warpage rate was 1%.

  Next, the amorphous metal ribbon provided with a heat-resistant resin is sheared and cut to 100 mm in the longitudinal direction of a 30 mm thin plate in the width direction, and the maximum warpage defined in JIS C 6481 and the maximum angle among the four corners of the rectangle are set. Measurement was made and the difference from 90 degrees was regarded as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed in a nitrogen atmosphere at 270 ° C. and 10 MPa for 30 minutes, and then laminated and integrated, followed by heat treatment at 370 ° C. and 1 MPa for 2 hours. Thereafter, for evaluation, the amount of deviation between the uppermost surface and the lowermost surface of the laminate was measured with a caliper and evaluated as the amount of deviation in the lamination.

(Example 2)
As the metal sheet, Honeywell, Metglas: 2605TCA (trade name), was used an amorphous metal strip having a width of about 142 mm, the composition having a thickness of about 25μm _Fe 78 _B 13 Si ₉ (atomic%). When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid. Then, in order to correct the warp of the thin metal plate coated with the resin, the maximum warp rate was set to 5%.

  Next, the amorphous metal ribbon to which the heat-resistant resin is applied is sheared and cut to 100 mm in the longitudinal direction of the 30 mm thin plate in the width direction, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle are set. Measurement was made and the difference from 90 degrees was regarded as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed in a nitrogen atmosphere at 270 ° C. and 10 MPa for 30 minutes, and then laminated and integrated, followed by heat treatment at 370 ° C. and 1 MPa for 2 hours. Thereafter, for evaluation, the amount of deviation between the uppermost surface and the lowermost surface of the laminate was measured with a caliper and evaluated as the amount of deviation in the lamination.

(Example 3)
As a metal thin plate, an amorphous metal ribbon having a composition of Co ₆₆ Fe ₄ Ni ₁ (BSi) ₂₉ (atomic%) having a width of about 50 mm and a thickness of about 15 μm, manufactured by Honeywell, Metglas: 2714A (trade name) used. When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid.

  At this time, when drying and heating at 140 ° C. and 260 ° C., the thin metal plate coated with the resin was rolled in the width direction to the side opposite to the resin surface, and the state was maintained until the temperature was returned to room temperature. As a result, the maximum warpage rate was 1%.

  Then, in order to correct the warp of the thin metal plate coated with the resin, the maximum warp rate was set to 2%.

  Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warpage defined by JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, and then pressurized for 30 minutes at 270 ° C. and 10 MPa in a nitrogen atmosphere, and then heat-treated at 400 ° C. and 1 MPa for 2 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

Example 4
As a metal thin plate, an amorphous metal ribbon having a composition of Co ₆₆ Fe ₄ Ni ₁ (BSi) ₂₉ (atomic%) having a width of about 50 mm and a thickness of about 15 μm, manufactured by Honeywell, Metglas: 2714A (trade name) used. When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid. Then, in order to correct the warp of the thin metal plate coated with the resin, the maximum warp rate was set to 8% by rounding the metal sheet opposite to the warp.

  Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, and then pressurized for 30 minutes at 270 ° C. and 10 MPa in a nitrogen atmosphere, and then heat-treated at 400 ° C. and 1 MPa for 2 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

(Example 5)
As a metal thin plate, Hitachi Metals, Finemet (trade name), FT-3 width of about 35 mm, thickness of about 18 μm, nanocrystalline magnetic metal ribbon with elemental composition of Fe, Cu, Nb, Si, B It was used. The same resin as in Example 1 was coated.

  At this time, when drying and heating at 140 ° C. and 260 ° C., the thin metal plate coated with the resin was rolled in the width direction to the side opposite to the resin surface, and the state was maintained until the temperature was returned to room temperature. As a result, the maximum warpage rate was 3%.

  Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warpage defined by JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed in a nitrogen atmosphere at 270 ° C. and 10 MPa for 30 minutes, laminated and integrated, and then heat-treated at 550 ° C. and 1 MPa for 1.5 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

(Example 6)
As a metal thin plate, Hitachi Metals, Finemet (trade name), FT-3 width of about 35 mm, thickness of about 18 μm, nanocrystalline magnetic metal ribbon with elemental composition of Fe, Cu, Nb, Si, B It was used. The same resin as in Example 1 was coated. Then, in order to correct the warp of the thin metal plate coated with the resin, the maximum warp rate was set to 9% by rounding the metal sheet opposite to the warp. Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed in a nitrogen atmosphere at 270 ° C. and 10 MPa for 30 minutes, laminated and integrated, and then heat-treated at 550 ° C. and 1 MPa for 1.5 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

(Example 7)
As a metal thin plate, Nippon Steel Corporation, a thin highlight core (trade name), a silicon steel plate having a 20HTH 1500 width of about 150 mm and a thickness of about 200 μm was used. The resin was coated in the same manner as in Example 1. At this time, when drying and heating at 140 ° C. and 260 ° C., the thin metal plate coated with the resin was rolled in the width direction to the side opposite to the resin surface, and the state was maintained until the temperature was returned to room temperature. As a result, the maximum warpage rate was 2%.

  Further, after stacking 50 test pieces of 30 mm × 100 mm, pressurizing at 270 ° C. and 10 MPa for 30 minutes in a nitrogen atmosphere and integrating the stacks, the stacking deviation amount was evaluated for evaluation.

(Example 8)
As a metal thin plate, Nippon Steel Corporation, a thin highlight core (trade name), a silicon steel plate having a 20HTH 1500 width of about 150 mm and a thickness of about 200 μm was used. The resin was coated in the same manner as in Example 1. Then, in order to correct the warp of the thin metal plate coated with the resin, the maximum warp rate was set to 3% by rounding the metal sheet opposite to the warp.

  Further, after stacking 50 test pieces of 30 mm × 100 mm, pressurizing at 270 ° C. and 10 MPa for 30 minutes in a nitrogen atmosphere and integrating the stacks, the stacking deviation amount was evaluated for evaluation.

(Comparative Example 1)
As the metal thin plate, an amorphous metal ribbon having a composition of Fe ₇₈ B ₁₃ Si ₉ (atomic%) having a width of about 142 mm and a thickness of about 25 μm, manufactured by Honeywell, Metglas: 2605TCA (trade name) was used. When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid.

  When the maximum warpage rate was measured, it was 18%.

  Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured and regarded as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed at 270 ° C. and 10 MPa for 30 minutes in a nitrogen atmosphere, laminated and integrated, and then heat treated at 370 ° C. and 1 MPa for 2 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

(Comparative Example 2)
As a metal thin plate, an amorphous metal ribbon having a composition of Co ₆₆ Fe ₄ Ni ₁ (BSi) ₂₉ (atomic%) having a width of about 50 mm and a thickness of about 15 μm, manufactured by Honeywell, Metglas: 2714A (trade name) used. When measured with an E-type viscometer on one entire surface of the ribbon, a polyamic acid solution having a viscosity of about 0.3 Pa · s was applied at 25 ° C. with a roll coater, dried at 140 ° C., and then at 260 ° C. After curing, a heat resistant resin (polyimide resin) of about 4 microns was applied to one surface of the amorphous metal ribbon. Polyimide resin is prepared by mixing 3,3′-diaminodiphenyl ether and 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride at a ratio of 1: 0.98 and condensing in a dimethylacetamide solvent at room temperature. It was obtained by polymerization. Usually, it was used as a diacetylamide solution as a polyamic acid.

  When the maximum warpage rate was measured, it was 15%.

  Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.

  Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, and then pressurized for 30 minutes at 270 ° C. and 10 MPa in a nitrogen atmosphere, and then heat-treated at 400 ° C. and 1 MPa for 2 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

(Comparative Example 3)
As a metal thin plate, Hitachi Metals, Finemet (trade name), FT-3 width of about 35 mm, thickness of about 18 μm, nanocrystalline magnetic metal ribbon with elemental composition of Fe, Cu, Nb, Si, B It was used. The same resin as in Example 1 was coated.

It was 21% when the maximum warpage was measured.
Next, the amorphous metal ribbon provided with heat-resistant resin is sheared and cut to 30 mm in the longitudinal direction and 100 mm in the longitudinal direction of the ribbon, and the maximum warp amount defined in JIS C 6481 and the maximum angle among the four corners of the rectangle Was measured, and the difference from 90 degrees was defined as a cutting deviation.
Further, 50 test pieces each having a size of 30 mm × 100 mm were laminated, pressed in a nitrogen atmosphere at 270 ° C. and 10 MPa for 30 minutes, laminated and integrated, and then heat-treated at 550 ° C. and 1 MPa for 1.5 hours. Thereafter, the amount of misalignment was evaluated for evaluation.

From the table, it was clarified that the magnetic metal laminate of the present invention has little stacking deviation and high dimensional stability during shearing by using the warp amount of the present invention.

  The present invention can be applied as a magnetic core in many applications where soft magnetic materials are used. For example, inductance, choke coil, high frequency transformer, low frequency transformer, reactor, pulse transformer, step-up transformer, noise filter, transformer for transformer, magneto-impedance element, magnetostrictive vibrator, magnetic sensor, magnetic head, electromagnetic shield, shield connector, shield Functions of various electronic devices and electronic components such as packages, electromagnetic wave absorbers, motors, generator cores, antenna cores, magnetic disks, magnetic application transport systems, magnets, electromagnetic solenoids, actuator cores, and printed circuit board magnetic cores Used as a supporting material.

It is a figure which shows the manufacturing method of the metal magnetic thin plate of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic metal thin plate 2 Sending roll part 3 Coating part 4 Resin surface 5 Warpage correction roll 6 Winding roll part

Claims (5)

A magnetic sheet metal in which a polymer compound layer, the polymer compound, was subjected to 4 hours drying at 120 ° C. as a pretreatment, under a nitrogen atmosphere, when held for 2 hours at 300 ℃, DTA- A heat-resistant resin having a weight loss of 1% or less measured using TG, and a resin varnish having a viscosity range of 0.005 to 200 Pa · s is applied to provide a polymer compound layer made of the heat-resistant resin. The maximum warpage rate represented by the ratio of the maximum warpage amount to the length of the sample piece of the maximum warpage portion measured based on JIS C 6481 is cured after coating so that the thickness is 0.1 μm to 1 mm. A nanocrystalline magnetic metal thin plate having a thickness of 10 to 50 μm provided with a polymer compound layer, characterized by being 10% or less.   A magnetic metal thin plate provided with a polymer compound layer, wherein the polymer compound was dried at 120 ° C. for 4 hours as a pretreatment, and then held at 300 ° C. for 2 hours in a nitrogen atmosphere. A heat-resistant resin having a weight loss of 1% or less measured using TG, and a resin varnish having a viscosity range of 0.005 to 200 Pa · s is applied to provide a polymer compound layer made of the heat-resistant resin. The maximum warpage rate represented by the ratio of the maximum warpage amount to the length of the sample piece of the maximum warpage portion measured based on JIS C 6481 is cured after coating so that the thickness is 0.1 μm to 1 mm. An amorphous magnetic metal thin plate having a thickness of 10 to 50 μm provided with a polymer compound layer, characterized by being 10% or less.   A magnetic metal thin plate provided with a polymer compound layer, wherein the polymer compound was dried at 120 ° C. for 4 hours as a pretreatment, and then held at 300 ° C. for 2 hours in a nitrogen atmosphere. A heat-resistant resin having a weight loss of 1% or less measured using TG, and a resin varnish having a viscosity range of 0.005 to 200 Pa · s is applied to provide a polymer compound layer made of the heat-resistant resin. The maximum warpage rate represented by the ratio of the maximum warpage amount to the length of the sample piece of the maximum warpage portion measured based on JIS C 6481 is cured after coating so that the thickness is 0.1 μm to 1 mm. A magnetic metal thin plate, which is a silicon steel plate having a thickness of 100 to 400 μm and provided with a polymer compound layer, characterized by being 10% or less. Apply a resin varnish with a viscosity in the range of 0.005 to 200 Pa · s to a magnetic metal sheet so that the coating thickness is 0.1 μm to 1 mm, and remove the solvent while curving the coating surface to make it the outer surface. A manufacturing method of a magnetic metal thin plate provided with the polymer compound layer according to any one of claims 1 to 3 . 5. A method for producing a magnetic metal thin plate provided with a polymer compound layer according to claim 4 , wherein a resin varnish that hardens upon reaction is used as the polymer compound, and the coating surface is curved to remove the solvent as the outer surface. A method for producing a thin magnetic metal plate provided with a polymer compound layer, wherein a curing reaction is caused after or after removal.

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