WO2020262494A1 - Fe基アモルファス合金薄帯及びその製造方法、鉄心、並びに変圧器 - Google Patents
Fe基アモルファス合金薄帯及びその製造方法、鉄心、並びに変圧器 Download PDFInfo
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- WO2020262494A1 WO2020262494A1 PCT/JP2020/024911 JP2020024911W WO2020262494A1 WO 2020262494 A1 WO2020262494 A1 WO 2020262494A1 JP 2020024911 W JP2020024911 W JP 2020024911W WO 2020262494 A1 WO2020262494 A1 WO 2020262494A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/008—Amorphous alloys with Fe, Co or Ni as the major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a localized treatment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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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
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons
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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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/03—Amorphous or microcrystalline structure
Definitions
- the present disclosure relates to Fe-based amorphous alloy strips, their manufacturing methods, iron cores, and transformers.
- Fe-based amorphous alloy strips are becoming more widespread, for example, as iron core materials for transformers.
- a laser scribing method or the like is known in which a magnetic region is subdivided by melting and quenching and solidifying.
- the surface of the amorphous alloy strip is locally and instantaneously melted by irradiating the pulse laser in the width direction of the amorphous alloy strip, and then quenching is performed.
- a method of subdividing a magnetic region by forming a series of solidified and amorphized spots is disclosed.
- Japanese Patent Application Laid-Open No. 61-258404 discloses that while the surface temperature of the thin band is 300 ° C. or higher, the laser beam is irradiated while sweeping in the width direction of the thin band.
- the angle ⁇ formed in the longitudinal direction of the thin band at intervals of 2 to 100 mm and in the width direction of the thin band is 30 ° or less.
- the ratio d / D of the average depth d in the plate thickness direction of each region to the thickness D of the thin band is set to 0.1 or more.
- the ratio of these regions in the thin band is 8% by volume or less.
- transformers have a wide variety of configurations, from small to large ones, and are used in all aspects of the living environment. And, due to the large amount of electricity used, it is one of the major causes of power loss, and there is always a demand to suppress the loss in the transformer. For this reason, countries around the world have established standards to control the loss. Typical examples are Japanese Industrial Standards JIS C 4304: 2013 and JIS C 4306: 2013, US DOE standard US Department of Energy 10 CFR Part 431.196, EU standard Communications Regulation (EU) No. There are 548/2014, Chinese national standard GB20052-2013, Indian standard IS 1180 (Part 1): 2018, etc., and all of them have stricter allowable loss or energy efficiency with each regular revision work. .. For this reason, high-efficiency transformers with less loss have become widespread in a form corresponding to these standards.
- Transformers are composed of an iron core and windings as the main components, and generally, grain-oriented electrical steel sheets are often used as the iron core.
- grain-oriented electrical steel sheets are often used as the iron core.
- there is also an Fe-based amorphous alloy strip as a material having a lower loss than the grain-oriented electrical steel sheet, there is also an Fe-based amorphous alloy strip, and an iron core using this Fe-based amorphous alloy strip is also used.
- Transformer losses can be broadly divided into no-load loss (iron loss) that occurs in the iron core and always occurs in a fixed amount regardless of the load current, and loss that occurs in the winding and is proportional to the square of the load current. There is a load loss (copper loss). Examinations to reduce the loss have been repeated, and although the loss has been improved, further reduction of the loss is required.
- iron loss no-load loss
- load loss copper loss
- the joint structure on the inner peripheral side is an overlap joint
- the joint structure on the outer peripheral side is a step wrap joint
- the inner peripheral side is A wound iron core using an amorphous material in which the ratio of the iron cores of the arranged overlapping structures is 32 to 62% is adopted.
- Japanese Patent Application Laid-Open No. 2008-71982 describes a transformer provided with an iron core obtained by forming an amorphous alloy thin film into a plurality of layers in an annular shape and a winding for excitation, and is formed on the surface of the amorphous alloy thin band forming the iron core.
- An insulating thin film is formed, and by forming the insulating thin film on the surface of the amorphous alloy strip, it is possible to suppress an increase in eddy current loss and reduce a no-load loss of a transformer.
- a three-phase five-legged core transformer has a structure in which an amorphous alloy strip and an electromagnetic steel plate are simultaneously used as the magnetic material of the wound core.
- the winding iron core that is linked with only one outer winding is an electromagnetic steel plate
- the central winding core that is linked with two windings is an amorphous alloy thin band. It is a structure to be. This eliminates the need for reinforcing materials that hold down the windings, and by making the structure compact, the man-hours and material costs for assembly work are reduced, and the no-load loss is reduced compared to when the magnetic material is only electromagnetic steel sheets. It is an object of the present invention to provide an alloy thin band wound steel core and a three-phase five-legged steel core transformer.
- iron loss under the condition of magnetic flux density of 1.45 T is not iron loss under the condition of magnetic flux density of 1.3 T. May be required to reduce.
- the conventional method of irradiating the laser beam is a method of forming a point-shaped irradiation mark because a pulse laser is used.
- the method using a pulse laser has a problem in productivity and a problem in that the cost increases.
- the surface morphology of the amorphous alloy strip may be significantly deformed by laser irradiation.
- the space factor of the amorphous alloy thin band becomes low when the magnetic core is formed by winding or laminating the amorphous alloy thin band.
- Such a large deformation of the surface morphology of the amorphous alloy strip is not a preferable morphology in terms of magnetic core characteristics.
- the crystallization region is formed by locally heating the thin band, the desired characteristics cannot be obtained due to the crystallization.
- the main loss of the transformer is the no-load loss generated in the iron core and the load loss generated in the winding.
- an Fe-based amorphous alloy strip having a small iron loss.
- Takagi, Yamamoto, Yamaji "Evaluation of amorphous transformers using pole transformer load pattern creation model" P885-892, Denki B, Vol. 128, No. 6, 2008,
- LOT 2 Distribution and power transformers Tasks 1-7 2010 / ETE / R / 106, January 2011, the average equivalent load factor corresponding to the effective value of the load factor throughout the year is 15%. It is known that the degree is low, and a transformer using an Fe-based amorphous alloy strip with a small no-load loss is extremely effective from the viewpoint of energy saving and CO 2 emission reduction.
- Fe-based amorphous alloy strips for the iron core of transformers include ordinary materials and high magnetic flux density materials as shown in Tables 1 and 2 of JIS C 2534: 2017 (corresponding IEC standard IEC60404-8-11). It is roughly divided into two types, and there are 16 types of each based on the maximum value of the iron loss and the minimum value of the space factor. It has the smallest iron loss, and the maximum value of iron loss at a frequency of 50 Hz and a magnetic flux density of 1.3 T is 0.08 W / kg, and the maximum value of iron loss at a frequency of 60 Hz and a magnetic flux density of 1.3 T is 0.11 W / kg. It is kg. However, in order to obtain a transformer with higher efficiency, it is necessary to use an Fe-based amorphous alloy strip having a smaller iron loss for the iron core.
- one aspect of the present disclosure preferably provides an Fe-based amorphous alloy strip in which iron loss is reduced under the condition of a magnetic flux density of 1.45 T. Further, it is preferable to provide a production method in which the required characteristics can be obtained, an Fe-based amorphous alloy strip with less deformation can be obtained, and the productivity is high.
- One aspect of the present disclosure is an Fe-based amorphous alloy strip having a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the linear laser irradiation marks have irregularities on the surface, and when the irregularities are evaluated in the casting direction, the height difference HL between the highest point and the lowest point in the thickness direction of the Fe-based amorphous alloy strip and the first surface.
- the height difference HL ⁇ width WA calculated from the width WA, which is the length of the linear laser irradiation mark in the casting direction, is 6.0 to 180 ⁇ m 2 .
- the width WA may be 28 ⁇ m or more.
- the height difference HL may be 0.20 ⁇ m or more.
- the linear laser irradiation mark is a melt-coagulated portion that has been melt-solidified by laser irradiation on the first surface, and may reach from the first surface to the second surface.
- the width ratio WB / WA between the width WA and the width WB, which is the length of the linear laser irradiation mark on the second surface in the casting direction, may be 0.57 or less.
- Another aspect of the present disclosure is an Fe-based amorphous alloy strip having a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the linear laser irradiation mark is a melt-solidified portion that is melt-solidified by irradiating the first surface with a laser, and reaches from the first surface to the second surface.
- the width ratio WB / WA between the width WA, which is the length of the linear laser irradiation mark on the first surface in the casting direction, and the width WB, which is the length of the linear laser irradiation mark on the second surface in the casting direction, is 0.57. It is as follows.
- the linear laser irradiation marks have irregularities on the surface, and when the irregularities are evaluated in the casting direction, the height difference between the highest point and the lowest point in the thickness direction of the Fe-based amorphous alloy strip.
- the height difference HL ⁇ width WA calculated from the HL and the width WA may be 6.0 to 180 ⁇ m 2 .
- the height difference HL may be 0.20 ⁇ m or more.
- Another aspect of the present disclosure is an Fe-based amorphous alloy strip having a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the width WA which is the length of the linear laser irradiation mark on the first surface in the casting direction, is 28.5 ⁇ m or more and 90 ⁇ m or less.
- the line spacing may be 2 mm to 200 mm when the spacing between the linear laser irradiation marks adjacent to each other is defined as the line spacing among the plurality of linear laser irradiation marks.
- the portion provided with the linear laser irradiation mark may be amorphous.
- the ratio of the length of the linear laser irradiation mark to the total length of the Fe-based amorphous alloy strip in the width direction is the Fe group. It may be in the range of 10% to 50% in the direction from the center of the amorphous alloy strip in the width direction to both ends in the width direction.
- One aspect of the present disclosure may have a free solidifying surface and a roll surface as the first surface and the second surface.
- the maximum cross-sectional height Rt of the portion of the free solidified surface other than the linear laser irradiation mark may be 3.0 ⁇ m or less.
- the thickness may be 18 ⁇ m to 35 ⁇ m.
- the alloy composition of the Fe-based amorphous alloy strip is composed of Fe, Si, B, and impurities, and when the total content of Fe, Si, and B is 100 atomic%, Fe The content may be 78 atomic% or more, the B content may be 10 atomic% or more, and the total content of B and Si may be 17 atomic% to 22 atomic%.
- the iron loss may be 0.150 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- the iron loss may be 8.6 W / kg or less and the exciting power VA may be 8.7 VA / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T.
- the coercive force Hc of the DC BH curve measured at a maximum applied magnetic field of 800 A / m may be 5.0 A / m or less.
- the square ratio [residual magnetic flux density Br / maximum magnetic flux density Bm] of the DC BH curve measured at a maximum applied magnetic field of 800 A / m may be 40% or less.
- Another aspect of the present disclosure is to irradiate at least the first surface of the Fe-based amorphous alloy strip having the first surface and the second surface with a laser using a CW (continuous wave) oscillation method to obtain a plurality of surfaces.
- This is a method for producing an Fe-based amorphous alloy strip to obtain an Fe-based amorphous alloy strip having linear laser irradiation marks.
- the laser density of the laser using the CW (continuous wave) oscillation method is 5 J / m or more and 35 J / m or less.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the linear laser irradiation marks have irregularities on the surface, and when the irregularities are evaluated in the casting direction, the height difference between the highest point and the lowest point in the thickness direction of the Fe-based amorphous alloy strip.
- the height difference HL ⁇ width WA calculated from the HL and the width WA, which is the length of the linear laser irradiation mark on the first surface in the casting direction, may be 6.0 to 180 ⁇ m 2 .
- the linear laser irradiation marks may reach from the first surface to the second surface.
- the width ratio WB / WA between the width WA, which is the length of the linear laser irradiation mark on the first surface in the casting direction, and the width WB, which is the length of the linear laser irradiation mark on the second surface in the casting direction, is 0.57. It may be as follows.
- the width WA which is the length of the linear laser irradiation mark on the first surface in the casting direction, may be 28 ⁇ m or more.
- the linear laser irradiation marks have irregularities on the surface, and when the irregularities are evaluated in the casting direction, the height difference between the highest point and the lowest point in the thickness direction of the Fe-based amorphous alloy strip.
- the HL may be 0.20 to 2.0 ⁇ m.
- the portion provided with the linear laser irradiation mark may be amorphous.
- the line spacing may be 2 mm to 200 mm when the spacing between the linear laser irradiation marks adjacent to each other is defined as the line spacing among the plurality of linear laser irradiation marks.
- Another aspect of the present disclosure is an iron core formed by laminating a plurality of the Fe-based amorphous alloy strips or winding at least one Fe-based amorphous alloy strip.
- One aspect of the present disclosure may be configured by bending a plurality of laminated Fe-based amorphous alloy strips and winding them in an overlapping manner.
- the iron loss may be 0.240 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- Another aspect of the present disclosure is a transformer including an iron core using the Fe-based amorphous alloy strip and a coil wound around the iron core.
- the iron core is formed by bending and overlapping a plurality of laminated Fe-based amorphous alloy strips, and has an iron loss of 0.240 W under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T. It may be less than / kg.
- One aspect of the present disclosure is a single-phase transformer, in which the no-load loss per weight of the iron core at 50 Hz is 0.15 W / kg or less, or the no-load loss per weight of the iron core at 60 Hz is 0.19 W / kg or less. It may be.
- One aspect of the present disclosure is a three-phase transformer, in which the no-load loss per weight of the iron core at 50 Hz is 0.19 W / kg or less, or the no-load loss per weight of the iron core at 60 Hz is 0.24 W / kg or less. It may be.
- the rated capacity may be 10 kVA or more.
- a Fe-based amorphous alloy strip having low iron loss is provided. Further, according to one aspect of the present disclosure, there is provided an Fe-based amorphous alloy strip having the required characteristics, a small degree of deformation due to laser irradiation, and high productivity, and a method for producing the same.
- FIG. 5 is a schematic plan view schematically showing a free solidification surface of a laser-processed Fe-based amorphous alloy strip piece (thin strip 10). It is a micrograph of a linear laser irradiation mark. It is the schematic of the uneven state of the surface of the linear laser irradiation mark. It is a figure which shows the relationship between the height difference HL ⁇ width WA and iron loss CL (60Hz, 1.45T). It is a figure which shows the relationship between the width WA and iron loss CL (60Hz, 1.45T). It is a figure which shows the relationship between the height difference HL ⁇ width WA, and the exciting power VA (60Hz, 1.45T).
- FIG. 17A shows No. 1 of Example 1.
- 13 is a photomicrograph of the linear laser irradiation mark
- FIG. 17B shows No. 13 of Example 1.
- FIG. 17 is a photomicrograph of the linear laser irradiation mark, and FIG. 17C shows No. 17 of Example 1.
- 20 are micrographs of linear laser irradiation marks, and FIG. 17D shows No. 1 of Example 1. It is a micrograph of 24 linear laser irradiation marks.
- FIG. 18A shows No. 1 of Example 1.
- FIG. 18B is No. 1 of Example 1.
- FIG. 18C shows No. 1 of Example 1.
- FIG. 18D is No. 1 of Example 1.
- the numerical range represented by using “-" means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
- the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of another numerical range described stepwise. ..
- the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples.
- process is included in this term not only as an independent process but also as long as the intended purpose of the process is achieved even if it cannot be clearly distinguished from other processes. ..
- the Fe-based amorphous alloy strip refers to a strip made of Fe-based amorphous alloy.
- the Fe-based amorphous alloy refers to an amorphous alloy containing Fe (iron) as a main component.
- the principal component refers to the component having the highest content ratio (mass%).
- the Fe-based amorphous alloy strip of the present disclosure introduces strain into the alloy strip by laser irradiation, subdivides the magnetic domain, and improves the magnetic characteristics.
- the Fe-based amorphous alloy strip is irradiated with a laser using a CW (continuous wave) oscillation method to form linear laser irradiation marks.
- This linear laser irradiation mark is a melt-solidified portion that is melted and solidified by laser irradiation, and is formed into a continuous linear shape by being irradiated with a CW (continuous wave) oscillation type laser.
- the present disclosure aims to improve the magnetic characteristics by performing this laser irradiation, but if the energy due to the laser irradiation is too strong or too weak, the desired magnetic characteristics cannot be obtained. Therefore, in the present disclosure, an appropriate linear laser irradiation mark is formed by appropriate laser irradiation, and a form of the appropriate linear laser irradiation mark is provided.
- the Fe-based amorphous alloy strip of the first embodiment of the present disclosure has a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the linear laser irradiation marks have irregularities on the surface, and when the irregularities are evaluated in the casting direction, the height difference HL between the highest point and the lowest point in the thickness direction of the Fe-based amorphous alloy strip and the first surface.
- the height difference HL ⁇ width WA calculated from the width WA, which is the length of the linear laser irradiation mark in the casting direction, is 6.0 to 180 ⁇ m 2 .
- the desired magnetic characteristics can be obtained.
- an Fe-based amorphous alloy strip having an iron loss of 0.150 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T can be obtained.
- the height difference HL ⁇ width WA is preferably 178 um 2 or less, further 175 .mu.m 2 or less. Further, the height difference HL ⁇ width WA is preferably 6.4 .mu.m 2 or more, further preferably 10 [mu] m 2 or more.
- the width WA is preferably 28 ⁇ m or more. Further, the width WA is preferably 28.5 ⁇ m or more, more preferably 29 ⁇ m or more, and further preferably 30 ⁇ m or more.
- the height difference HL is 0.20 ⁇ m or more. Further, the height difference HL is preferably 0.21 ⁇ m or more, more preferably 0.24 ⁇ m or more, further preferably 0.25 ⁇ m or more, still more preferably 0.30 ⁇ m or more.
- the height difference HL is preferably 2.0 ⁇ m or less. It is more preferably less than 2.0 ⁇ m, further preferably 1.9 ⁇ m or less, still more preferably 1.8 ⁇ m or less, still more preferably 1.7 ⁇ m or less.
- the width ratio WB / WA of the width WA and the width WB of the linear laser irradiation mark on the back surface B of the surface A irradiated with the laser is 0.57 or less (including 0). Is preferable. Further, the width ratio WB / WA is preferably 0.55 or less, more preferably 0.54 or less, further preferably 0.52 or less, and further preferably 0.50 or less. This width ratio WB / WA may be 0. When the width ratio WB / WA is 0, it means that no linear laser irradiation mark is observed on the back surface B of the laser-irradiated surface A.
- the Fe-based amorphous alloy strip of the second embodiment of the present disclosure has a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the linear laser irradiation mark is a melt-solidified portion that is melt-solidified by irradiating the first surface with a laser, and reaches from the first surface to the second surface.
- the width ratio WB / WA between the width WA, which is the length of the linear laser irradiation mark on the first surface in the casting direction, and the width WB, which is the length of the linear laser irradiation mark on the second surface in the casting direction, is 0.57. It is as follows.
- the width ratio WB / WA between the width WA and the width WB is 0.57 or less (including 0)
- the desired magnetic characteristics can be obtained.
- an Fe-based amorphous alloy strip having an iron loss of 0.150 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T can be obtained.
- the Fe-based amorphous alloy strip of the third embodiment of the present disclosure has a first surface and a second surface.
- the Fe-based amorphous alloy strip has a plurality of continuous linear laser irradiation marks on at least the first surface.
- the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the width WA which is the length of the linear laser irradiation mark on the first surface in the casting direction, is 28.5 ⁇ m or more and 90 ⁇ m or less.
- the width WA described above is 28.5 ⁇ m or more and 90 ⁇ m or less, the desired magnetic characteristics can be obtained.
- an Fe-based amorphous alloy strip having an iron loss of 0.150 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T can be obtained.
- the width ratio WB of the width WA of the linear laser irradiation mark on the laser-irradiated surface A of the Fe-based amorphous alloy thin band and the width WB of the linear laser irradiation mark on the back surface B of the laser-irradiated surface A It was found that when / WA is 0.57 or less (including 0), a state in which stress wrinkles are not formed on the edge of the linear laser irradiation mark on the back surface B can be obtained.
- the energy of the laser to be irradiated is set to an appropriate value.
- the energy of the laser to be irradiated is appropriately set in consideration of the scanning speed of the laser and the thickness of the alloy strip.
- the laser density is preferably 5 J / m or more and 35 J / m or less.
- linear laser irradiation marks are formed by irradiating a laser using a CW (continuous wave) oscillation method.
- the linear laser irradiation marks are melt-solidified by the laser irradiation, and the apparent state (color, shape) is changed as compared with the portion not irradiated with the laser. That is, the portion where the apparent state is changed is the linear laser irradiation mark (molten solidification portion).
- the width of the portion where the apparent state is changing (the length in the direction orthogonal to the continuous linear extending direction) is defined as the width of the linear laser irradiation mark (molten solidification portion).
- the linear laser irradiation marks formed by irradiating a laser using this CW (continuous wave) oscillation method are different from a collection of point-shaped laser irradiation marks using a pulse laser.
- productivity can be easily increased by increasing the output of the oscillator simply by oscillating the laser continuously.
- an Fe-based amorphous alloy strip having desired characteristics can be obtained without increasing the cost.
- an Fe-based amorphous alloy strip with reduced iron loss under conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T can be obtained.
- the linear laser irradiation marks are formed by irradiating a laser using a CW (continuous wave) oscillation method, and are formed in a continuous linear shape, but are partially formed. It doesn't matter if it is interrupted. It may be continuous at least 5 mm or more.
- the point-shaped laser irradiation mark by the pulse laser and the linear laser irradiation mark using the CW (continuous wave) oscillation method can be distinguished by observing the laser irradiation mark.
- iron loss CL is reduced under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T. Further, an Fe-based amorphous alloy strip having a reduced coercive force Hc (60 Hz, 1.45 T) can be obtained.
- the iron loss CL (1 kHz, 1 T) under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T is reduced.
- the exciting power VA (1 kHz, 1 T) under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T can also be reduced.
- the Fe-based amorphous alloy strip of the present disclosure becomes useful for high-frequency applications.
- the Fe-based amorphous alloy strip of the present disclosure is a Fe-based amorphous alloy strip having a free-solidifying surface and a roll surface.
- the Fe-based amorphous alloy strip having a free-solidifying surface and a roll surface is a strip manufactured (cast) by the single roll method.
- the surface that is rapidly cooled and solidified in contact with the cooling roll during casting is the roll surface, and the surface opposite to the roll surface (that is, the surface that is exposed to the atmosphere during casting) is the free solidification surface.
- the Fe-based amorphous alloy strip of the present disclosure may be a strip that has not been cut after casting (for example, a roll body wound into a roll after casting), or is desired after casting. It may be a thin strip cut out to a size.
- FIG. 1 A schematic diagram of the Fe-based amorphous alloy strip of the present embodiment is shown in FIG.
- a plurality of linear laser irradiation marks 12 are formed on the free solidification surface (or roll surface) of the Fe-based amorphous alloy strip 10.
- the left-right direction corresponds to the casting direction
- the vertical direction corresponds to the width direction of the thin band.
- the linear laser irradiation mark 12 is provided along the direction toward the width direction orthogonal to the casting direction of the thin band.
- L1 indicates the length of the thin band
- W1 indicates the width of the thin band
- LP1 indicates the line spacing of the linear laser irradiation marks.
- the continuous linear laser irradiation mark is linear. Since it is formed by scanning the laser irradiation using the CW oscillation method, a substantially linear linear laser irradiation mark is formed, although some fluctuation occurs.
- melt-solidified portion of the present disclosure is preferably amorphous. If the melt-solidified portion crystallizes, the magnetic properties deteriorate.
- the linear laser irradiation marks are provided along the width direction orthogonal to the casting direction of the Fe-based amorphous alloy strip. Further, the linear laser irradiation mark is preferably formed in the width direction of the thin band so as to include the "central portion in the width direction" described later.
- the "casting direction” is a direction corresponding to the circumferential direction of the cooling roll when casting the Fe-based amorphous alloy strip, in other words, the Fe-based amorphous alloy strip after casting and before being cut. It is the direction corresponding to the longitudinal direction of. Then, the direction orthogonal to the longitudinal direction is the width direction of the thin band.
- the "casting direction" is by observing the free solidification surface and / or the roll surface of the thin strip piece. For example, thin streaks along the casting direction are observed on the free solidification surface and / or the roll surface of the thin strip piece. Further, the direction orthogonal to the casting direction is the width direction.
- the interval is a line interval
- the line interval is preferably 2 mm to 200 mm. This line spacing is the line spacing on the laser-irradiated surface A.
- the width direction is a direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the line spacing is the linear laser irradiation on both sides when the thin band is viewed transparently.
- the scar is measured.
- linear laser irradiation marks are formed by alternately irradiating both sides with laser in the casting direction of the thin band, "linear laser irradiation marks adjacent to each other" are irradiated on one surface. The linear laser irradiation mark and the linear laser irradiation mark that is irradiated on the other surface and is adjacent to the casting direction are targeted.
- the line spacing is more preferably 3.5 mm or more, further preferably 5 mm or more, still more preferably 10 mm or more. Further, it is more preferably 100 mm or less, further preferably 80 mm or less, still more preferably 60 mm or less. Further, it can be narrowed to 50 mm or less, 40 mm or less, and 30 mm or less.
- the directions of the plurality of linear laser irradiation marks are preferably substantially parallel, but are not limited to substantially parallel.
- the directions of the plurality of linear laser irradiation marks may or may not be parallel.
- the "center portion in the width direction" of the Fe-based amorphous alloy strip can be a portion having a certain width from the center in the width direction toward both ends in the width direction.
- the above "some width” is 1/5 of the entire width (1/5 from the center to one end, and the length of the central portion in the width direction is the width.
- the range of the region that is 1/5) of the entire direction can be set as the central portion. Therefore, in the range from the center in the width direction to both ends in the width direction to 1/5 from the center to the edge, that is, in the range where the length of the central portion in the width direction is 1/5 of the entire width.
- the line spacing is preferably in the range of 2 mm to 200 mm.
- the line spacing is in the range of 2 mm to 200 mm in the range of the region where the length of the central portion in the width direction is 1/4 of the entire width. More preferably, the line spacing is in the range of 2 mm to 200 mm in the range of the region where the length of the central portion in the width direction is 1/2 of the entire width.
- the directions of the plurality of linear laser irradiation marks may have a non-parallel arrangement relationship with respect to the width direction orthogonal to the casting direction of the Fe-based amorphous alloy strip. ..
- the angle formed by each direction of the plurality of linear laser irradiation marks and the width direction of the Fe-based amorphous alloy strip may be more than 10 ° and intersect with an acute angle or an obtuse angle with respect to the casting direction. ..
- each direction of the plurality of linear laser irradiation marks is substantially parallel to the direction orthogonal to the casting direction and the thickness direction of the Fe-based amorphous alloy strip.
- the direction in which each of the plurality of linear laser irradiation marks is substantially parallel to the direction orthogonal to the casting direction and the thickness direction of the Fe-based amorphous alloy strip is the direction of each of the plurality of linear laser irradiation marks. This means that the angle between the casting direction and the thickness direction of the Fe-based amorphous alloy strip is 10 ° or less.
- the plurality of linear laser irradiation marks are not limited to being substantially parallel.
- each direction of the plurality of linear laser irradiation marks is substantially parallel to the width direction of the Fe-based amorphous alloy strip.
- the plurality of linear laser irradiation marks are not limited to being substantially parallel.
- the direction of the linear laser irradiation mark does not have to be parallel to the direction orthogonal to the casting direction of the Fe-based amorphous alloy thin band, and the direction of the linear laser irradiation mark and the casting of the Fe-based amorphous alloy thin band
- the angle formed by the direction may have an inclination angle of more than 10 °. In this way, even if the inclination angle exceeds 10 °, it is interpreted that the linear laser irradiation marks are provided along the direction orthogonal to the casting direction of the Fe-based amorphous alloy strip.
- the inclination angle is preferably less than 45 °, more preferably 40 ° or less, further preferably 30 ° or less, and further preferably 20 ° or less. Most preferably, it is 10 ° or less.
- the Fe-based amorphous alloy strip of the present disclosure may have one linear laser irradiation mark in the width direction of the strip, or may have two or more in the width direction of the strip. In the case where there are a plurality of linear laser irradiation marks in the width direction and the plurality of linear laser irradiation marks are lined up in a straight line, it can be treated as one linear laser irradiation mark.
- the Fe-based amorphous alloy strip of the present disclosure is formed by forming a row of a plurality of linear laser irradiation marks provided in the casting direction of the Fe-based amorphous alloy strip in the width direction orthogonal to the casting direction. It may be 1) a mode having one row (hereinafter referred to as a single group), or (2) a mode having a plurality of rows (hereinafter referred to as a plurality of groups).
- a row of a plurality of linear laser irradiation marks provided in the casting direction of the Fe-based amorphous alloy strip is also referred to as a "group of irradiation marks".
- a plurality of groups of irradiation marks exist in the width direction of the thin band, and the positions of the linear laser irradiation marks do not have to be on the same line in the width direction among the plurality of groups, and are linear.
- Each of the laser irradiation marks may have a positional relationship shifted in the casting direction. For example, when there are two groups of irradiation marks in the width direction of the thin band, a plurality of linear laser irradiation marks arranged in one group and a plurality of linear laser irradiation marks arranged in the other group are cast. The positional relationship may be such that they are alternately present with each other with a certain distance shifted in the direction.
- the line interval in the present disclosure is a value obtained as follows.
- the line spacings are adjacent to each other in the casting direction.
- the interval between the two matching linear laser irradiation marks can be arbitrarily selected and measured at five locations, and can be used as the average value of the measured values.
- the plurality of linear laser irradiation marks forming the single group are preferably present at regular intervals, but may be present at arbitrary intervals.
- the line spacing is a plurality.
- the value (average value) obtained in the same manner as in the above method for each "group of irradiation marks" in the group can be further averaged.
- the plurality of linear laser irradiation marks constituting each "group of irradiation marks" are preferably present at regular intervals, but may be present at arbitrary intervals. If one of the plurality of groups does not reach the central portion in the width direction, the linear laser irradiation mark may be temporarily extended to the central portion in the width direction to obtain the interval in the central portion in the width direction. it can.
- the ratio of the length of the linear laser irradiation mark in the width direction to the total length of the Fe-based amorphous alloy strip in the width direction is 10% to 50% in the direction from the center in the width direction to both ends in the width direction, respectively. It is preferably%. In addition, "%" here is 100% of the entire length in the width direction of the Fe-based amorphous alloy strip.
- the direction of the linear laser irradiation mark When the direction of the linear laser irradiation mark has an inclination with respect to the width direction, it is not the length of the inclined linear laser irradiation mark itself, but is thin in the portion where the linear laser irradiation mark is formed.
- the value converted to the length in the width direction of the band is defined as the length in the width direction of the linear laser irradiation mark.
- the linear laser irradiation mark starts from the center of the Fe-based amorphous alloy strip in the width direction and reaches one end and the other end in the width direction.
- the entire length of the linear laser irradiation mark of the Fe-based amorphous alloy thin band in the width direction is Fe-based amorphous.
- the full width of the alloy thin band corresponds to the full width of the alloy thin band.
- the ratio of the length in the width direction is 10%, which means that the linear laser irradiation marks start from the center of the Fe-based amorphous alloy strip in the width direction and are 10% each in the direction toward both ends in the width direction.
- Having a length that is, having a linear laser irradiation mark having a length of 20% of the length in the width direction of the Fe-based amorphous alloy strip in the central region of the Fe-based amorphous alloy strip. To say that you are.
- the linear laser irradiation marks are formed at both ends of the Fe-based amorphous alloy strip in the width direction, leaving a margin of 40% with respect to the total length in the width direction.
- the ratio of the length of the linear laser irradiation mark of the Fe-based amorphous alloy thin band to the entire length of the thin band in the width direction in the width direction is from the center in the width direction to both ends in the width direction. More preferably, it is 25% or more in each direction.
- the linear laser irradiation marks are formed at least in the six regions in the center of the width direction, excluding the two regions at both ends from the eight regions obtained by dividing the width direction of the Fe-based amorphous alloy strip into eight equal parts. Is preferable.
- the linear laser irradiation marks of the present disclosure have the above-mentioned characteristics. For example, when a large number of linear laser irradiation marks are formed in the Fe-based amorphous alloy strip, all the lines thereof. The effect of the present disclosure can be obtained even if the laser irradiation mark does not have the above-described configuration of the present disclosure. Of all the linear laser irradiation marks, it is preferable that 60% or more of the linear laser irradiation marks have the above-described configuration of the present disclosure. Further, it is preferable that 70% or more of the linear laser irradiation marks have the above-described configuration of the present disclosure.
- linear laser irradiation marks it is preferable that 80% or more of the linear laser irradiation marks have the above-described configuration of the present disclosure. Further, it is preferable that 90% or more of the linear laser irradiation marks have the above-described configuration of the present disclosure. Further, it is preferable that all the linear laser irradiation marks have the above-described configuration of the present disclosure.
- the wavy unevenness may cause an increase in the exciting power measured under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- the wavy unevenness is reduced as much as possible.
- the maximum cross-sectional height Rt in the portion other than the plurality of linear laser irradiation marks on the free solidification surface is preferably 3.0 ⁇ m or less.
- the maximum cross-sectional height Rt of 3.0 ⁇ m or less means that the free solidified surface has no wavy irregularities or the wavy irregularities are reduced.
- the maximum cross-sectional height Rt in the portion other than the plurality of linear laser irradiation marks on the free solidification surface is set to JIS B 0601: 2001 for the portion other than the plurality of linear laser irradiation marks on the free solidification surface.
- the evaluation length is 4.0 mm
- the cutoff value is 0.8 mm
- the cutoff type is 2RC (phase compensation) for measurement (evaluation).
- the direction of the evaluation length is the casting direction of the Fe-based amorphous alloy strip.
- the above measurement in which the evaluation length is 4.0 mm is specifically performed by continuously measuring 5 times with a cutoff value of 0.8 mm.
- the maximum cross-sectional height Rt in the portion other than the plurality of linear laser irradiation marks on the free solidification surface is more preferably 2.5 ⁇ m or less.
- the lower limit of the maximum cross-sectional height Rt is not particularly limited, but from the viewpoint of manufacturing suitability of the Fe-based amorphous alloy strip, the lower limit of the maximum cross-sectional height Rt is preferably 0.8 ⁇ m, more preferably 0.8 ⁇ m. It is 1.0 ⁇ m.
- the chemical composition of the Fe-based amorphous alloy strip of the present disclosure is not particularly limited, and may be any chemical composition of the Fe-based amorphous alloy (that is, a chemical composition containing Fe (iron) as a main component).
- the chemical composition of the Fe-based amorphous alloy strip of the present disclosure is preferably the following chemical composition A.
- the chemical composition A which is a preferable chemical composition, is composed of Fe, Si, B, and impurities, and when the total content of Fe, Si, and B is 100 atomic%, the Fe content is 78 atomic% or more. It is a chemical composition in which the content of B is 10 atomic% or more and the total content of B and Si is 17 atomic% to 22 atomic%.
- the Fe content is 78 atomic% or more.
- Fe (iron) is one of the transition metals having the largest magnetic moment even if it has an amorphous structure, and it plays a role in magnetism in Fe—Si—B-based amorphous alloys.
- the saturation magnetic flux density (Bs) of the Fe-based amorphous alloy strip can be increased (for example, Bs of about 1.6T can be realized). Further, it becomes easy to achieve a preferable magnetic flux density B0.1 (1.52T or more).
- the Fe content is preferably 80 atomic% or more, more preferably 80.5 atomic% or more, and further preferably 81.0 atomic% or more. Further, it is preferably 82.5 atomic% or less, and more preferably 82.0 atomic% or less.
- the content of B is 10 atomic% or more.
- B (boron) is an element that contributes to amorphous formation.
- the content of B is 10 atomic% or more, the amorphous forming ability is further improved.
- the magnetic domain is likely to be oriented in the casting direction, and the magnetic flux density (B0.1) is likely to be improved by widening the magnetic domain width.
- the content of B is preferably 11 atomic% or more, and more preferably 12 atomic% or more.
- the upper limit of the content of B depends on the total content of B and Si described later, but is preferably 16 atomic%.
- the total content of B and Si is 17 atomic% to 22 atomic%.
- Si is an element that segregates on the surface in the molten metal state and has the effect of preventing oxidation of the molten metal. Further, Si acts as an auxiliary agent for forming an amorphous substance, has an effect of raising the glass transition temperature, and is also an element for forming a more thermally stable amorphous phase.
- the total content of B and Si is 22 atomic% or less, a large amount of Fe, which is a bearer of magnetism, can be secured, so that the saturation magnetic flux density Bs is improved and the magnetic flux density B0.1 is improved. Is advantageous.
- the total content of B and Si is 20 atomic% or less, which can be appropriately determined in relation to the content of Fe.
- the Si content is preferably 2.0 atomic% or more, more preferably 2.4 atomic% or more, and further preferably 3.5 atomic% or more.
- the upper limit of the Si content depends on the total content of B and Si, but is preferably 6.0 atomic%.
- a more preferable chemical composition of the Fe-based amorphous alloy strip is composed of Fe, Si, B, and impurities, and Fe, Si,
- the total content of and B is 100 atomic% or more
- the content of Fe is 80 atomic% or more
- the content of B is 12 atomic% or more
- the total content of B and Si is 17 atomic% or more. ⁇ 20 atomic%.
- Chemical composition A contains impurities.
- the impurities contained in the chemical composition A may be only one type or two or more types.
- impurities include all elements other than Fe, Si, and B. Specifically, for example, C, Ni, Co, Mn, O, S, P, Al, Ge, Ga, Be, Ti, Examples thereof include Zr, Hf, V, Nb, Ta, Cr, Mo, and rare earth elements.
- These elements can be contained in a range of 1.5% by mass or less in total with respect to the total mass of Fe, Si, and B.
- the upper limit of the total content of these elements is preferably 1.0% by mass or less, more preferably 0.8% by mass or less, still more preferably 0.75% by mass or less. In this range, these elements may be added.
- the thickness of the Fe-based amorphous alloy strip of the present disclosure is not particularly limited, but the thickness is preferably 18 ⁇ m to 35 ⁇ m.
- a thickness of 18 ⁇ m or more is advantageous in terms of suppressing waviness of the Fe-based amorphous alloy strip and improving the space factor. More preferably, the thickness is 20 ⁇ m or more.
- a thickness of 35 ⁇ m or less is advantageous in terms of suppressing embrittlement of the Fe-based amorphous alloy strip and magnetic saturation. More preferably, the thickness is 30 ⁇ m or less.
- the iron loss CL under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is reduced by subdividing the magnetic domain by forming linear laser irradiation marks.
- the iron loss CL under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is preferably 0.150 W / kg or less, more preferably 0.140 W / kg or less, and further preferably 0.130 W / kg or less. ..
- the lower limit of the iron loss CL under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is not particularly limited, but from the viewpoint of manufacturing suitability of the Fe-based amorphous alloy strip, the lower limit of the iron loss CL is preferably 0.050 W /. It is kg.
- iron loss CL under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T is also reduced.
- the iron loss CL under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T is preferably 8.6 W / kg or less. It is more preferably 8.0 W / kg or less, and even more preferably 7.0 W / kg or less.
- iron loss CL under the conditions of a frequency of 50 Hz and a magnetic flux density of 1.45 T is also reduced.
- the iron loss CL is preferably 0.120 W / kg or less under the conditions of a frequency of 50 Hz and a magnetic flux density of 1.45 T.
- the iron loss CL in the Fe-based amorphous alloy strip is measured according to JIS 7152 (1996 version).
- ⁇ Excitation power VA> As described above, in the Fe-based amorphous alloy strip of the present disclosure, an increase in the exciting power VA under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is suppressed. As the height difference of the linear laser irradiation marks increases, the exciting power VA also tends to increase. For example, by setting the height difference to 2.5 ⁇ m or less, it is possible to suppress a significant increase in the exciting power VA.
- the exciting power VA under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T is reduced.
- the exciting power VA under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T is preferably 8.7 VA / kg or less. It is more preferably 8.0 VA / kg or less, and even more preferably 7.5 VA / kg or less.
- the Bs of the Fe-based amorphous alloy strip having the chemical composition (Fe 82 Si 4 B 14 ) of the examples described later is 1.63 T. Bs is almost uniquely determined by the chemical composition.
- the Fe-based amorphous alloy strip of the present disclosure can be used at a Bmax of 1.43T or more (preferably 1.45T to 1.50T). The Bmax / Bs ratio when the Bmax is 1.43T is 0.88, and the Bmax / Bs ratio when the Bmax is 1.50T is 0.92.
- the Fe-based amorphous alloy strip of the present disclosure has an operating magnetic flux density Bmax satisfying that the Bmax / Bs ratio is 0.88 to 0.94 (preferably 0.89 to 0.92). It is particularly suitable for applications used in
- the Fe-based amorphous alloy strip of the present disclosure is used at an operating magnetic flux density Bmax satisfying that the Bmax / Bs ratio is 0.88 to 0.94 (preferably 0.89 to 0.92). However, iron loss and an increase in exciting power can be suppressed.
- the above-mentioned characteristics are values obtained by performing a heat treatment in which a magnetic field is applied to the Fe-based amorphous alloy strip in the longitudinal direction of the strip.
- the heat treatment of the Fe-based amorphous alloy thin band in a magnetic field is performed for the purpose of relaxing the internal stress and facilitating the magnetization in the longitudinal direction of the thin band, and is appropriately performed in order to obtain desired characteristics.
- the heat treatment can be carried out by holding the heat at about 300 ° C. to 400 ° C. for a certain period of time.
- the holding time is preferably 24 hours or less, more preferably 4 hours or less.
- the magnetic field during the heat treatment is preferably 400 A / m or more, more preferably 800 A / m or more. Further, it can be carried out in the atmosphere, in an inert gas such as argon gas, nitrogen gas or helium, or in a vacuum. It is also possible to heat-treat the iron core after it is formed.
- the Fe-based amorphous alloy strip of the present disclosure has excellent characteristics in a state after forming linear laser irradiation marks and before performing heat treatment.
- the coercive force Hc of the DC BH curve measured at a maximum applied magnetic field of 800 A / m is preferably 5.0 A / m or less.
- the coercive force Hc is preferably 4.9 A / m or less, and more preferably 4.8 A / m or less.
- the square ratio [residual magnetic flux density Br / maximum magnetic flux density Bm] at that time is preferably 40% or less.
- the holding time during the heat treatment can be shortened, and embrittlement after the heat treatment is unlikely to occur. This improves the handleability when manufacturing the transformer core.
- large iron cores and laminated iron cores for electronic components may be used without heat treatment due to the problem of embrittlement. In that case, it is advantageous that the characteristics are excellent in the state before the heat treatment.
- the Fe-based amorphous alloy strip of the present disclosure described above can be preferably produced by the following production method.
- the manufacturing method of the embodiment is A plurality of lasers using a CW (continuous wave) oscillation method are applied to at least one of the free-solidified surface and the roll surface of the material thin band which is made of an Fe-based amorphous alloy and has a free-solidified surface and a roll surface.
- This is a method for producing an Fe-based amorphous alloy strip to obtain an Fe-based amorphous alloy strip having linear laser irradiation marks.
- the laser density of the laser using the CW (continuous wave) oscillation method is 5 J / m or more and 35 J / m or less.
- the linear laser irradiation mark is a continuous linear method, and is a method for producing an Fe-based amorphous alloy strip, which is provided along a direction perpendicular to the casting direction of the Fe-based amorphous alloy strip.
- the process of forming a plurality of continuous linear laser irradiation marks by irradiating a laser using a CW (continuous wave) oscillation method is also referred to as a "laser processing process”.
- the manufacturing method of this embodiment may have other steps other than the laser processing step, if necessary.
- a step of preparing a material strip (material preparation step) may be provided before the laser machining step.
- the material preparation process includes a casting process of the material thin band
- the casting process of the material thin band and the laser processing process may be continuous.
- a material preparation step may be provided before the laser machining step.
- the material preparation step is a step of preparing a material strip having a free solidifying surface and a roll surface.
- the material strip referred to here may be a strip that has not been cut after casting (for example, a roll body that has been wound into a roll after casting), or has a desired size after casting. It may be a cut-out thin strip.
- the cut-out strip piece also corresponds to the Fe-based amorphous alloy strip in the present disclosure.
- the material strip is, so to speak, the Fe-based amorphous alloy strip of the present disclosure at the stage before the linear laser irradiation marks are formed.
- the free-solidifying surface and the roll surface of the material strip are synonymous with the free-solidifying surface and the roll surface of the Fe-based amorphous alloy strip of the present disclosure, respectively.
- the preferred embodiment of the material strip (for example, preferred chemical composition, preferred Rt) is the same as the preferred embodiment of the Fe-based amorphous alloy strip of the present disclosure, except for the presence or absence of linear laser irradiation marks.
- the material preparation step may be a step of simply preparing a pre-cast (that is, already completed) material strip for use in the laser processing step, or a step of newly casting a material strip. It may be.
- the material preparation step may be a step of casting the material strip and cutting out the strip piece from the material strip.
- the CW (continuous wave) oscillation method is applied to at least one of the free solidification surface and the roll surface of the material thin band by laser processing using the CW (continuous wave) oscillation method (that is, the CW (continuous wave) oscillation method is applied.
- the CW (continuous wave) oscillation method that is, the CW (continuous wave) oscillation method is applied.
- a plurality of continuous linear laser irradiation marks are formed.
- the preferred embodiment of the linear laser irradiation mark formed by the laser processing step (preferably, line spacing, height difference, etc.) is the same as the preferred embodiment of the linear laser irradiation mark in the Fe-based amorphous alloy strip of the present disclosure described above. is there.
- each of the plurality of linear laser irradiation marks is a mark to which energy is applied by laser irradiation, and the effect of reducing iron loss by laser irradiation can be obtained.
- the laser conditions in the laser processing process are not particularly limited, but the preferable conditions are as follows.
- the laser density for forming linear laser irradiation marks is preferably 5 J / m or more and 35 J / m or less.
- a more preferable lower limit is 6 J / m, more preferably 7 J / m, still more preferably 8 J / m, still more preferably 10 J / m.
- the more preferable upper limit is 31 J / m, more preferably 30 J / m, further preferably 28 J / m, still more preferably 25 J / m.
- CW laser light is scanned and irradiated in the thin band width direction when forming laser irradiation marks.
- a YAG laser, a CO 2 gas laser, a fiber laser, a diode laser and the like can be used as the laser light source.
- a fiber laser is preferable because it can stably irradiate a high-quality laser beam for a long period of time.
- M2 M square
- M square M square
- the laser light introduced into the fiber oscillates on the principle of FBG (Fiber Bragg grating) by the diffraction gratings at both ends of the fiber. Since the laser beam is excited in the elongated fiber, there is no problem of the thermal lens effect in which the beam quality is deteriorated due to the temperature gradient generated inside the crystal. Furthermore, since the fiber core is as thin as a few microns, the laser beam can propagate in a single mode even at high output, the beam diameter is narrowed, and a high energy density laser beam can be obtained. In addition, since the depth of focus is deep, laser irradiation marks can be accurately formed even on a wide thin band (for example, a thin band having a width of 200 mm or more).
- FBG Fiber Bragg grating
- the wavelength of the laser light is about 250 nm to 10600 nm depending on the laser light source, but it is suitable because the wavelength of 900 to 1100 nm is sufficiently absorbed in the alloy strip.
- the beam diameter of the laser beam is preferably 10 ⁇ m or more and 500 ⁇ m or less, and more preferably 25 ⁇ m or more and 100 ⁇ m or less.
- the laser processing step may be a step of performing laser processing on the material thin band after casting by the single roll method and before winding, or from the material thin band (roll body) after winding. It may be a step of performing laser processing on the unwound material thin band, or it may be a step of performing laser processing on the thin band piece cut out from the material thin band after winding.
- the laser processing step is a step of performing laser processing on the material thin band before winding after casting by the single roll method
- a laser processing device is installed between the cooling roll and the winding roll. It can be carried out using the deployed system.
- the scanning speed of the CW laser light is preferably 0.2 m / sec or more from the viewpoint of stability of the CW laser light output, and is preferably 4000 m / sec or less from the viewpoint of performing thermal processing on the material thin band.
- the iron core of the present disclosure is a stack of a plurality of Fe-based amorphous alloy strips of the present disclosure described above, and specifically, a Fe-based amorphous alloy in which Fe-based amorphous alloy strips are laminated and laminated. The thin band is bent and wound in an overlap.
- the iron core of the present disclosure has an iron loss of 0.240 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T. It is preferably 0.230 W / kg or less, more preferably 0.200 W / kg or less, and further preferably 0.180 W / kg or less.
- the lower limit of iron loss under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is not particularly limited, but the lower limit of iron loss is preferably 0.050 W / kg from the viewpoint of manufacturing suitability of the Fe-based amorphous alloy strip. Yes, more preferably 0.080 W / kg.
- Fe-based amorphous alloy strip of the present disclosure The details of the Fe-based amorphous alloy strip of the present disclosure are as described above, and the detailed description thereof will be omitted.
- a known method can be applied to the overlap winding method.
- the shape of the iron core of the present disclosure may be either circular or rectangular.
- the iron loss value of the material (Fe-based amorphous alloy thin band) is not maintained as it is, but the iron loss value of the iron core becomes larger than the iron loss value of the material. This is also called the building factor. For example, the iron loss value becomes large because stress is applied to the material when the iron core is manufactured.
- the iron loss value is larger than that of the raw material, it is still possible to obtain an iron core having an extremely low iron loss.
- an iron core having a low iron loss can be obtained under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- an iron core having a low iron loss can be obtained under conditions other than the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- the Fe-based amorphous alloy strip of the present disclosure is not limited to the above-mentioned iron core structure, and can also be used for iron cores and electronic parts having other structures.
- it may be a wound iron core or a laminated iron core.
- it can also be used for a wound magnetic core for electronic parts, a cut core formed by a wound iron core, a laminating material, and the like.
- These iron cores can be constructed by laminating or winding Fe-based amorphous alloy strips of the present disclosure.
- the transformer of the present disclosure includes an iron core using the Fe-based amorphous alloy strip of the present disclosure described above and a coil wound around the iron core, and the iron core is a laminated Fe-based amorphous alloy thin band.
- the bands are bent and overlapped, and the iron loss is 0.240 W / kg or less under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T.
- the iron core in the present disclosure is obtained by stacking a plurality of the Fe-based amorphous alloy strips of the present disclosure described above in layers, bending the laminated Fe-based amorphous alloy strips, and winding them in an overlapping manner.
- a known method can be applied as the method of overlapping winding.
- the iron loss under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is 0.240 W / kg or less, preferably 0.230 W / kg or less, and more preferably 0.200 W / kg. It is less than or equal to, more preferably 0.180 W / kg or less.
- the lower limit of iron loss under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T is not particularly limited, but the lower limit of iron loss is preferably 0.050 W / kg from the viewpoint of manufacturing suitability of the Fe-based amorphous alloy strip. Yes, more preferably 0.080 W / kg.
- the shape of the iron core in the transformer of the present disclosure may be either circular or rectangular. Further, the type of coil wound around the iron core is not limited, and a known coil may be appropriately selected.
- the iron core in the transformer of the present disclosure is not limited to the iron core in which the laminated Fe-based amorphous alloy strips are bent and wound in an overlapping manner.
- the iron core of the transformer can be appropriately designed according to the application, and can be a laminated iron core, a wound iron core, or the like.
- the no-load loss per weight of the iron core at 50 Hz is preferably 0.15 W / kg or less. Further, the no-load loss per weight of the iron core at 60 Hz is preferably 0.19 W / kg or less.
- the no-load loss per weight of the iron core at 50 Hz is preferably 0.19 W / kg or less. Further, the no-load loss per weight of the iron core at 60 Hz is preferably 0.24 W / kg or less.
- Example 1 ⁇ Manufacturing of material strips (Fe-based amorphous alloy strips before laser processing)>
- a material strip having a chemical composition of Fe 82 Si 4 B 14 , a thickness of 25 ⁇ m, and a width of 210 mm is formed.
- a material strip having a chemical composition of Fe 82 Si 4 B 14 , a thickness of 25 ⁇ m, and a width of 210 mm is formed.
- the "chemical composition of Fe 82 Si 4 B 14 " is composed of Fe, Si, B, and impurities, and is contained in Fe when the total content of Fe, Si, and B is 100 atomic%. It means a chemical composition in which the amount is 82 atomic%, the B content is 14 atomic%, and the Si content is 4 atomic%.
- the molten metal having the chemical composition of Fe 82 Si 4 B 14 was kept at a temperature of 1300 ° C., and then the molten metal was ejected from the slit nozzle onto the surface of the axially rotating cooling roll. The spouted molten metal was rapidly cooled and solidified on the surface of the cooling roll to obtain a material strip.
- the atmosphere around the surface of the cooling roll immediately below the slit nozzle on which the paddle of the molten metal is formed is a non-oxidizing gas atmosphere.
- the slit length of the slit nozzle was 210 mm, and the slit width was 0.6 mm.
- the material of the cooling roll was a Cu alloy, and the peripheral speed of the cooling roll was 27 m / s.
- the pressure at which the molten metal is ejected and the nozzle gap are the maximum cross-sectional height Rt (specifically, casting of the material thin band) on the free solidification surface of the material thin band to be manufactured.
- the maximum cross-sectional height Rt) measured along the direction was adjusted to be 3.0 ⁇ m or less.
- FIG. 1 is a schematic plan view schematically showing a free solidification surface of a laser-processed Fe-based amorphous alloy strip piece (thin strip 10).
- the length L1 of the thin band 10 shown in FIG. 1 (that is, the length of the sample piece cut out from the material thin band) is 120 mm
- the width W1 of the thin band 10 (that is, the width of the sample piece cut out from the material thin band) is 25 mm.
- the sample piece was cut out in a direction in which the length direction of the sample piece and the length direction of the material strip (casting direction) coincide with each other, and the width direction of the sample piece and the width direction of the material strip coincide with each other.
- a plurality of linear laser irradiation marks 12 were formed on the free solidifying surface of the sample piece (thin band 10 before laser processing; the same applies hereinafter) in a direction parallel to the width direction of the sample piece.
- the linear laser irradiation mark 12 was formed over the entire width direction of the sample piece. That is, the length of the linear laser irradiation mark 12 in the width direction of the sample piece was set to 100% with respect to the total width of the sample piece. That is, the ratio of the length of the linear laser irradiation mark 12 in the width direction to the entire length of the Fe-based amorphous alloy strip 10 in the width direction is 50% in the direction from the center in the width direction to both ends in the width direction. Is.
- the directions of the plurality of linear laser irradiation marks 12 were made parallel to each other.
- Tables 1 and 3 show the line spacing LP1 (mm), the scanning speed (m / sec) of the CW (continuous wave) oscillation type laser, and the laser density (J / m).
- the laser density is obtained by dividing the output of the laser oscillator by the scanning speed, and is an index showing the intensity of the laser per unit length.
- the irradiation conditions of the CW (continuous wave) oscillation type laser were as follows.
- CW laser irradiation conditions As the laser oscillator, a fiber laser (YLR-150-1500-QCW) manufactured by IPG Photonics was used.
- the laser medium of this laser oscillator is Yb-doped glass fiber, and the oscillation wavelength is 1064 nm.
- the spot diameter of the laser on the free solidifying surface of the sample piece was adjusted to be 37.0 ⁇ m.
- the beam diameter was adjusted using an optical component, a collimator lens: f100 mm and an f ⁇ lens: focal length 254 mm / processing point distance 297 mm.
- Beam mode M2 was set to 1.05 (single mode).
- the laser output was 0 to 275 W, and the Focus was 0 mm.
- Focus means the difference (absolute value) between the processing point distance (297 mm) of the condenser lens and the actual distance from the condenser lens to the free solidification surface of the thin band.
- the portion other than the linear laser irradiation mark 12 (that is, the non-laser-processed region) is based on JIS B 0601: 2001, and the evaluation length is 4.
- the maximum cross-sectional height Rt was measured with 0 mm, a cutoff value of 0.8 mm, and a cutoff type of 2RC (phase compensation).
- the maximum cross-sectional height Rt can also be measured before laser machining.
- the direction of the evaluation length was set to be the casting direction of the material thin band.
- the above-mentioned measurement having an evaluation length of 4.0 mm was specifically carried out by continuously measuring 5 times with a cutoff value of 0.8 mm.
- the maximum cross-sectional height Rt of each sample piece was in the range of 1.0 to 2.5 ⁇ m.
- the iron loss CL was measured under two conditions: a frequency of 60 Hz and a magnetic flux density of 1.45 T, and a condition of a frequency of 60 Hz and a magnetic flux density of 1.50 T. was measured by sinusoidal excitation.
- the exciting power VA was applied to the AC magnetic measuring instrument under two conditions: a frequency of 60 Hz and a magnetic flux density of 1.45 T, and a condition of a frequency of 60 Hz and a magnetic flux density of 1.50 T. was measured by sinusoidal excitation.
- the coercive force Hc was measured by an AC magnetic measuring instrument under two conditions: a frequency of 60 Hz and a magnetic flux density of 1.45 T, and a condition of a frequency of 60 Hz and a magnetic flux density of 1.50 T. was measured by sinusoidal excitation.
- the linear laser irradiation mark (molten solidification portion) is a portion where the apparent state is changed due to melt solidification, and the width of the portion where the apparent state is changed is the width of the linear laser irradiation mark.
- the width was defined as the (molten solidification part).
- the linear laser irradiation marks on the back surface B of the surface A irradiated with the laser were not observed. In that case, the width WB was set to 0 ⁇ m.
- the photomicrograph was taken at a magnification of 1000x.
- the surface shape was photographed using a color 3D laser microscope VK-8710 (manufactured by KEYENCE Co., Ltd.) and a 50x objective lens CF IC EPI Plan 50X (manufactured by Nikon Corporation) (magnification is 1000). Magnification (objective lens 50x x monitor magnification 20x).
- Tables 1 to 6 the measured width WA, width WB, and the presence or absence of stress wrinkles are shown in Tables 1 to 6.
- Tables 5 and 6 The results of observing the width WB and stress wrinkles are shown in Tables 5 and 6.
- the ones shown in Tables 5 and 6 are the observations of the width WB and the stress wrinkles in some of the results shown in Tables 1 to 4, and No. is the same No. for the same sample as Tables 1 to 4. Is attached.
- the width WA and the width WB were measured at the portion where the maximum value was obtained.
- the average value was calculated by measuring the part where the maximum value was obtained at three places.
- the uneven state of the surface was roughly divided into A type, B type, and C type shown in FIG. Although each type in FIG. 3 actually has fine irregularities, it schematically shows a large change in shape.
- the shape shown in FIG. 3 corresponds to the surface state of the cross section of the Fe-based amorphous alloy strip.
- the highest point corresponding to the highest point in the thickness direction of the thin band and corresponding to the uppermost point in the figure
- the lowest point corresponding to the lowest point in the thickness direction of the thin band and corresponding to the figure in the figure.
- the height difference HL from (corresponding to the bottom) was measured from the profile as described above.
- the height difference HL was measured at three points on each linear laser irradiation mark to obtain an average value.
- Tables 1 to 6 show the results of the height difference HL and the height difference HL x width WA.
- FIG. 13 shows a micrograph of the linear laser irradiation mark of the laser-irradiated surface A of 54
- FIG. 14 shows a micrograph of the linear laser irradiation mark of the back surface B of the laser-irradiated surface A.
- 13 and 14 show the width WA and the width WB of the linear laser irradiation marks, respectively.
- No. in the Fe-based amorphous alloy strip of 54 linear linear laser irradiation marks are formed on the laser-irradiated surface A. Further, a linear linear laser irradiation mark is also formed on the back surface B of the surface A irradiated with the laser. Further, no stress wrinkles were observed on the edge of the linear laser irradiation mark on the back surface B of the surface A irradiated with the laser.
- FIG. 15 shows a micrograph of the linear laser irradiation mark of the laser-irradiated surface A of * 44
- FIG. 16 shows a micrograph of the linear laser irradiation mark of the back surface B of the laser-irradiated surface A.
- FIGS. 15 and 16 show the width WA and the width WB of the linear laser irradiation marks, respectively.
- the linear laser irradiation mark on the surface A irradiated with the laser has a slight undulation in the linear direction, and it can be seen that the laser is too strong. Further, a linear linear laser irradiation mark is also formed on the back surface B of the surface A irradiated with the laser. A stress wrinkle 1 was formed on the edge of the linear laser irradiation mark on the back surface B of the surface A irradiated with the laser.
- FIG. 18 shows micrographs of linear laser irradiation marks on the laser-irradiated surface A of 26, 28, 34, and 36, respectively.
- No. 13 is FIG. 17A
- No. 17 is FIG. 17B
- No. 20 is FIG. 17C
- No. No. 24 is shown in FIG. 17D.
- 26 is shown in FIG. 18A
- No. No. 28 is shown in FIG. 18B.
- 34 is FIG. 18C
- No. 36 is FIG. 18D.
- Other examples were also observed, but they were similar to the forms shown in FIGS. 17 and 18, respectively.
- the micrograph was taken at a magnification of 1000 times.
- the linear laser irradiation marks of the examples are linear (extending in the horizontal direction in the figure).
- Example 1 The same operation as in Example 1 was performed except that the laser processing was not performed.
- FIG. 4 shows the relationship between the height difference HL ⁇ width WA of each sample shown in Tables 1 to 4 and the iron loss CL (60 Hz, 1.45 T).
- Tables 1 to 4 and FIG. 4 when the height difference HL ⁇ width WA is 6.0 to 180 ⁇ m 2 , a Fe-based amorphous alloy strip having a low iron loss is obtained.
- the iron loss CL (60 Hz, 1.45 T) is 0.15 W / kg or less.
- the iron loss CL (60 Hz, 1.45 T) is 0.15 W / kg or less.
- FIG. 6 shows the relationship between the height difference HL ⁇ width WA of each sample shown in Tables 1 to 4 and the exciting power VA (60 Hz, 1.45 T).
- the exciting power VA tends to increase as the value of the height difference HL ⁇ width WA increases.
- the height difference HL ⁇ width WA is 180 ⁇ m 2 or less, a large increase in the exciting power VA can be suppressed.
- FIG. 7 shows the relationship between the height difference HL ⁇ width WA and the coercive force Hc (60 Hz, 1.45 T) of each sample shown in Tables 1 to 4. As shown in Tables 1 to 4 and FIG. 7, the coercive force can be reduced when the height difference HL ⁇ width WA is 6.0 to 180 ⁇ m 2 .
- FIG. 22 shows the relationship between the width ratio WB / WA shown in Tables 5 and 6 and the iron loss (60 Hz, 1.45 T).
- No. * 1 is excluded.
- the width WA of the linear laser irradiation mark on the laser-irradiated surface A and the width WB of the linear laser irradiation mark on the back surface B of the laser-irradiated surface A It can be seen that when the ratio WB / WA is 0.57 or less (including 0), a Fe-based amorphous alloy strip having a low iron loss can be obtained. Specifically, at this time, the iron loss CL (60 Hz, 1.45 T) is 0.15 W / kg or less.
- FIG. 5 shows the relationship between the width WA of each sample shown in Tables 1 to 4 and the iron loss CL (60 Hz, 1.45 T).
- Tables 1 to 4 and FIGS. 5 and 5 and 6 when focusing only on the width WA of the linear laser irradiation mark on the surface A irradiated with the laser, if the width WA is 28.5 ⁇ m or more and 90 ⁇ m or less. , A low-loss Fe-based amorphous alloy strip can be obtained.
- the Fe group having a low iron loss Amorphous alloy strips are obtained. Specifically, at this time, the iron loss CL (60 Hz, 1.45 T) is 0.15 W / kg or less.
- FIG. 19 shows the relationship between the width WA of each sample shown in Tables 1 to 4 and the exciting power VA (60 Hz, 1.45 T).
- the exciting power VA tends to increase as the value of the width WA increases.
- the width WA is 90.0 ⁇ m or less, a large increase in the exciting power VA can be suppressed.
- the height difference HL ⁇ width WA is a predetermined value, even if the width WA is 121.30 ⁇ m, a large increase in the exciting power VA can be suppressed.
- FIG. 20 shows the relationship between the width WA of each sample shown in Tables 1 to 4 and the coercive force Hc (60 Hz, 1.45 T). As shown in Tables 1 to 4 and FIG. 20, when focusing only on the width WA, the coercive force can be reduced when the width WA is 28.5 to 90.0 ⁇ m. If the height difference HL ⁇ width WA is a predetermined value, the coercive force can be reduced even if the width WA is 121.30 ⁇ m.
- FIG. 21 shows the relationship between the line spacing LP1 and the iron loss CL (60 Hz, 1.45 T) of the examples (excluding the comparative example) shown in Tables 1 to 4. From Tables 1 to 4 and FIG. 21, when the line spacing is 2 mm or more and 60 mm or less, the iron loss CL (60 Hz, 1.45 T) is 0.150 W / kg or less, and the Fe group amorphous with low loss at 60 Hz, 1.45 T. An alloy strip has been obtained. From FIG. 21, there is no tendency for the iron loss to increase sharply even if the line spacing LP1 is lengthened. Even if the line spacing exceeds 60 mm and is 80 mm, 100 mm, or 200 mm, it is considered that an Fe-based amorphous alloy strip having a low iron loss CL (60 Hz, 1.45 T) can be obtained.
- the Fe-based amorphous alloy strip of the present disclosure has a coercive force Hc of 5.0 A / m or less before heat treatment.
- the square ratio at this time is also No. 48 is 41.5%, but 40% or less is obtained in the other examples of the present disclosure.
- FIG. 23 shows the relationship between the height difference HL and the iron loss CL (1 kHz, 1 T) at this time.
- the Fe-based amorphous alloy strip of the present disclosure has an iron loss of 8.6 W / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure are observed. It can be seen that the iron loss at high frequencies can be reduced by forming the metal. Further, the larger the height difference, the more the iron loss (1 kHz, 1 T) tends to be reduced.
- FIG. 24 shows the relationship between the height difference HL and the exciting power VA (1 kHz, 1 T).
- the Fe-based amorphous alloy strip of the present disclosure can obtain an exciting power of 8.7 VA / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure can be obtained. It can be seen that the exciting power at high frequencies can be reduced by forming the metal. Further, the larger the height difference, the smaller the exciting power (1 kHz, 1 T) tends to be.
- FIG. 25 shows the relationship between the height difference HL ⁇ width WA and the iron loss CL (1 kHz, 1 T).
- the Fe-based amorphous alloy strip of the present disclosure has an iron loss of 8.6 W / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure are observed. It can be seen that the iron loss at high frequencies can be reduced by forming the metal. Further, the larger the height difference HL ⁇ width WA, the more the iron loss CL (1 kHz, 1 T) tends to be reduced.
- FIG. 26 shows the relationship between the height difference HL ⁇ width WA and the exciting power VA (1 kHz, 1 T).
- the Fe-based amorphous alloy strip of the present disclosure can obtain an exciting power of 8.7 VA / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure can be obtained. It can be seen that the exciting power at high frequencies can be reduced by forming the metal.
- FIG. 27 shows the relationship between the laser density and the iron loss CL (1 kHz, 1 T).
- the Fe-based amorphous alloy strip of the present disclosure has an iron loss of 8.6 W / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure are observed. It can be seen that the iron loss at high frequencies can be reduced by forming the metal. Further, the higher the laser density, the more the iron loss CL (1 kHz, 1 T) tends to be reduced.
- FIG. 28 shows the relationship between the laser density and the exciting power VA (1 kHz, 1 T).
- the Fe-based amorphous alloy strip of the present disclosure can obtain an exciting power of 8.7 VA / kg or less under the conditions of a frequency of 1 kHz and a magnetic flux density of 1 T, and the linear laser irradiation marks of the present disclosure can be obtained. It can be seen that the exciting power at high frequencies can be reduced by forming the metal.
- the Fe-based amorphous alloy strip of the present disclosure is also useful for high frequencies.
- FIG. 29 shows the relationship between the laser density of each sample shown in Tables 1 to 4 and the iron loss CL (60 Hz, 1.45 T). From Tables 1 to 4 and FIG. 29, when the laser density is 5 J / m or more and 35 J / m or less, the iron loss CL (60 Hz, 1.45 T) is 0.150 W / kg or less, and the loss is low at 60 Hz, 1.45 T. Fe-based amorphous alloy strip was obtained.
- FIG. 30 shows the relationship between the laser density of each sample shown in Tables 1 to 4 and the exciting power VA (60 Hz, 1.45 T). From Tables 1 to 4 and FIG. 30, it can be seen that the exciting power VA sharply increases when the laser density exceeds 35 J / m. Therefore, by setting the laser density to 35 J / m or less, it is possible to suppress a significant increase in the exciting power VA. Further, when the laser density is 31 J / m or less, the increase in the exciting power VA is further suppressed.
- FIG. 31 shows the relationship between the laser density of each sample shown in Tables 1 to 4 and the coercive force Hc (60 Hz, 1.45 T). From Tables 1 to 4 and FIG. 31, it can be seen that the coercive force Hc rapidly increases when the laser density exceeds 35 J / m. Therefore, the coercive force Hc can be reduced by setting the laser density to 35 J / m or less. Further, a coercive force Hc of 3.0 A / m or less is obtained when the laser density is 5 J / m to 35 J / m.
- Example 2 ⁇ Forming linear laser irradiation marks on the roll surface> Using the same material thin band as that used in Example 1, a linear laser is used on the roll surface of the material thin band under the conditions of a line spacing of LP1 of 20 mm, a scanning speed of 5 m / sec, and a laser density of 10 J / m. Irradiation marks were formed. An observation photograph of this linear laser irradiation mark is shown in FIG. The heat treatment conditions are the same as in Example 1.
- the height difference HL of Example 2 was 1.04 ⁇ m, the width WA was 38.56 ⁇ m, and the height difference HL ⁇ width WA was 40.10 ⁇ m 2 .
- the iron loss CL, exciting power VA, and coercive force Hc under the conditions of a frequency of 60 Hz and a magnetic flux density of 1.45 T are 0.0979 W / kg, 0.2413 VA / kg, and 2.0868 A / m, respectively, and are linear.
- the morphology and the obtained characteristics of the laser irradiation marks were the same as in the case of the Fe-based amorphous alloy strip in which the linear laser irradiation marks of Example 1 were formed on the free solidified surface. Therefore, it can be seen that almost the same characteristics can be obtained regardless of whether the linear laser irradiation marks are formed on the free solidification surface or the roll surface.
- Example 3 In the same manner as in Example 1, an Fe-based amorphous alloy strip (chemical composition: Fe 82 Si 4 B 14 , thickness: 25 ⁇ m, width: 142 mm) was obtained, the line spacing LP1 was 20 mm, and the scanning speed was 8 m / sec. A linear laser irradiation mark was formed under the condition that the laser density was 17 J / m, and an Fe-based amorphous alloy strip was prepared. Table 9 shows the state of the linear laser irradiation marks. In Example 3, the width WA was 70.5 ⁇ m and the width WB was 0 ⁇ m.
- the uneven state of the linear laser irradiation mark on the surface A irradiated with the laser had a height difference HL of 0.44 ⁇ m and a height difference HL ⁇ width WA of 31.02 ⁇ m 2 . Further, on the back surface B of the surface A irradiated with the laser, no linear laser irradiation marks were observed, and there were no stress wrinkles.
- a plurality of the obtained thin strip pieces were laminated to form a laminated body, the laminated body was bent into a U shape, and both ends thereof were overlapped to form an iron core having the structure shown in FIGS. 8 and 9.
- the shape of the iron core is such that the window frame height A is 163 mm, the window frame width B is 72 mm, the ribbon lamination thickness C is 25.3 mm, and the height D is. It is 142 mm.
- the space factor of the iron core is 88%, and the weight is 13 kg.
- this iron core is overlap-wound at the lower part of FIG. Further, when a plurality of thin strip pieces were laminated to form a laminated body, a resin coating r was applied to the laminated surface in the middle abdomen of the laminated body so that the thin strip pieces did not separate from each other.
- the iron loss CL and the exciting power VA were measured for the obtained iron core.
- the primary winding (N1) and the secondary winding (N2) were wound around the iron core as a coil, the frequency was set to 60 Hz, and the magnetic flux densities were set to 1.45 T and 1.5 T.
- the number of turns of the primary winding was set to 10 turns, and the number of turns of the secondary winding was set to 2 turns. In this way, a transformable circuit was produced.
- the voltage E (V) read by the wattmeter, the conversion of the maximum magnetic flux density Bm (T), the exciting power (VA / kg) at the specified magnetic flux density Bm (T), and the calculation of the iron loss (W / kg) are The following formulas 1, 2, and 3 were used. The measurement results are shown in Table 10.
- Comparative Example 2 Further, as Comparative Example 2, the same measurement and evaluation were performed on the iron core manufactured in the same manner as described above, except that the thin band piece which did not form the linear laser irradiation mark was used.
- E Effective voltage measured by wattmeter (V)
- C Core product thickness (mm)
- W Nominal width of ribbon used (mm)
- N 1 Number of times the exciting coil is wound
- f Measurement frequency (Hz)
- Bm Maximum magnetic flux density or specified magnetic flux density
- I Effective current measured by wattmeter (A)
- M Core weight (kg)
- W Power meter measurement power (W)
- the iron loss CL measured at 1.45 T and 60 Hz was 0.284 W / kg in the iron core using the thin strips that did not form the linear laser irradiation marks.
- the iron core using the thin band piece on which the linear laser irradiation mark of the present embodiment was formed it was 0.197 W / kg, which was a value reduced by about 30%.
- the iron loss CL measured at 1.50 T and 60 Hz is 0.310 W / kg in the iron core using the thin band piece that did not form the linear laser irradiation mark, whereas the linear shape of the present embodiment.
- the iron core using the thin strips on which the laser irradiation marks were formed was 0.220 W / kg, which was a value reduced by about 30%.
- Example 3 Using the iron core of Example 3 and the iron core of Comparative Example 2 described above, the iron loss was evaluated by changing the magnetic flux density at frequencies of 50 Hz and 60 Hz. The results are shown in Table 11. Further, FIG. 11 shows the relationship between the magnetic flux density at a frequency of 50 Hz and iron loss, and FIG. 12 shows the relationship between the magnetic flux density at a frequency of 60 Hz and iron loss.
- an iron core having extremely low iron loss could be obtained even if the magnetic flux densities changed between the frequencies of 50 Hz and 60 Hz.
- FIG. 33 shows an example of the configuration of the iron core and the winding of the transformer of the present embodiment.
- This transformer includes a circumferential iron core 21 in which a plurality of laminated Fe-based amorphous alloy strips are bent and wound in an overlapping manner, and a winding 22 wound around the iron core.
- the iron core of the first embodiment is composed of one circumferential iron core (single-phase two-leg winding iron core).
- the main characteristics and weight of the oil-filled transformer (hereinafter referred to as Example 4) having a single-phase 50 Hz and a rated capacity of 10 kVA according to the present disclosure in accordance with JIS C 4304: 2013 using the iron core of this embodiment are the same as those of the conventional example 1.
- Example 4 has the above characteristics, it is described as 25AMP06-88 according to the definition of "5 Amorphous band type symbols" in JIS C 2534: 2017.
- the Fe-based amorphous alloy strip used in Conventional Example 1 is 25AMP08-88.
- the characteristics of Examples 4 to 11 below are numerical values obtained by analysis by simulation.
- the Fe-based amorphous alloy strip used in Example 4 has a thickness of 25 ⁇ m and a width of 142.2 mm, and the difference HL between the highest point and the lowest point of the linear laser irradiation marks formed on the free solidifying surface is 0. It is 62 ⁇ m, and the iron loss at a frequency of 50 Hz and a magnetic flux density of 1.45 T is 0.075 W / kg, and the iron loss at a frequency of 60 Hz and a magnetic flux density of 1.45 T is 0.095 W / kg.
- the Fe-based amorphous alloy strip used in Conventional Example 1 has a thickness of 25 ⁇ m and a width of 142.2 mm, has no laser irradiation marks, and has an iron loss of 0 at a frequency of 50 Hz and a magnetic flux density of 1.45 T.
- the iron loss at 130 W / kg, frequency 60 Hz, and magnetic flux density 1.45 T is 0.167 W / kg.
- Example 4 the number of stacked iron cores 21 is 1875, and the weight thereof is shown in Table 12.
- the primary winding of this transformer is a copper wire with a diameter of 0.9 mm and is wound for 3143 turns, and the secondary winding is a flat wire of 3.2 mm x 6.0 mm made of aluminum. The windings of 100 turns were connected in parallel.
- Example 4 the no-load loss per weight of the iron core was 0.149 W / kg, which was reduced by about 25% from the no-load loss per weight of the iron core of Conventional Example 1 of 0.197 W / kg. I understand.
- the ratio of the conventional example 1 to the energy consumption efficiency standard value defined by JIS C 4304: 2013 is 0.73 (described in "Energy consumption efficiency ratio” in Table 12. The same shall apply hereinafter).
- Example 4 it was improved to 0.70, and it can be seen that the annual CO 2 emission is also improved by about 17% when the average equivalent load ratio of the distribution transformer is 15%. This can be seen from the fact that the “annual CO 2 emission ratio when the load factor is 15%” shown in Table 12 is 0.83 (the same applies hereinafter).
- Example 5 As a second embodiment of the transformer having the iron core and winding configuration of the present embodiment shown in FIG. 33, an oil-filled transformer having a single-phase 60 Hz and a rated capacity of 10 kVA according to the present disclosure in accordance with JIS C 4304: 2013 (hereinafter referred to as , The main characteristics and weight of Example 5) are shown in Table 13 in comparison with Conventional Example 2.
- Example 5 The Fe-based amorphous alloy strip used in Example 5 is the same as that of Example 4, and the Fe-based amorphous alloy strip used in Conventional Example 2 is the same as that of Conventional Example 1.
- the number of stacked iron cores 21 is 1785, and the weight thereof is shown in Table 13.
- the primary winding of this transformer is a copper wire with a diameter of 0.9 mm and is wound for 2776 turns, and the secondary winding is a flat wire of 2.6 mm x 6.0 mm made of aluminum.
- the 88-turn winding was connected in parallel.
- Example 5 From Table 13, in Example 5, the no-load loss per weight of the iron core was 0.180 W / kg, which was reduced by about 30% from the no-load loss per weight of the iron core of Conventional Example 2 of 0.259 W / kg. I understand.
- the ratio of the conventional example 2 is 0.72 to the energy consumption efficiency standard value defined in JIS C 4304: 2013, whereas that of the fifth example is improved to 0.67. It can be seen that the annual CO 2 emissions are also improved by about 20% when the average equivalent load ratio of the distribution transformer is 15%.
- Example 6 As a third embodiment of the transformer having the iron core and winding configuration of the present embodiment shown in FIG. 33, an oil-filled transformer having a single-phase 50 Hz and a rated capacity of 30 kVA according to the present disclosure in accordance with JIS C 4304: 2013 (hereinafter referred to as , The main characteristics and weight of Example 6) are shown in Table 14 in comparison with Conventional Example 3.
- the Fe-based amorphous alloy strip used in Example 6 has a thickness of 25 ⁇ m and a width of 213.4 mm, and the difference HL between the highest point and the lowest point of the linear laser irradiation mark formed on the free solidifying surface is 0. It is 52 ⁇ m, and the iron loss at a frequency of 50 Hz and a magnetic flux density of 1.45 T is 0.076 W / kg, and the iron loss at a frequency of 60 Hz and a magnetic flux density of 1.45 T is 0.097 W / kg.
- the Fe-based amorphous alloy strip used in Conventional Example 3 has a thickness of 25 ⁇ m and a width of 213.4 mm, no laser irradiation marks are formed, and iron loss at a frequency of 50 Hz and a magnetic flux density of 1.45 T is 0.
- the iron loss at 132 W / kg, frequency 60 Hz, and magnetic flux density 1.45 T is 0.168 W / kg.
- Example 6 the number of laminated iron cores 21 is 3015, and the weight thereof is shown in Table 14.
- the primary winding of this transformer uses a copper wire with a diameter of 1.4 mm and is wound for 1509 turns, and the secondary winding uses a flat wire of 3.2 mm ⁇ 15 mm made of aluminum and has 44 turns each. The windings of were connected in parallel.
- Example 6 From Table 14, in Example 6, the no-load loss per weight of the iron core was 0.126 W / kg, which was reduced by about 36% from the no-load loss per weight of the iron core of Conventional Example 3 of 0.197 W / kg. I understand.
- the ratio of the conventional example 3 is 0.72 to the energy consumption efficiency standard value defined in JIS C 4304: 2013, whereas that of the sixth embodiment is improved to 0.67. It can be seen that the annual CO 2 emissions are also improved by about 22% when the average equivalent load ratio of the distribution transformer is 15%. Further, the no-load loss per weight of the iron core in Example 4 was 0.149 W / kg, whereas in Example 6, it was 0.126 W / kg, which is an improvement of 0.023 W / kg. The reason for this is that due to the increase in size of the iron core, the ratio of the length of the curved portion to the magnetic path length of the iron core becomes small, and no load loss due to the residual stress of the curved portion of the iron core is suppressed.
- Example 7 As a fourth embodiment of the transformer having the iron core and winding configuration of the present embodiment shown in FIG. 33, an oil-filled transformer having a single-phase 60 Hz and a rated capacity of 30 kVA according to the present disclosure in accordance with JIS C 4304: 2013 (hereinafter referred to as , The main characteristics and weight of Example 7) are shown in Table 15 in comparison with Conventional Example 4.
- Example 7 The Fe-based amorphous alloy strip used in Example 7 is the same as in Example 6, and the Fe-based amorphous alloy strip used in Conventional Example 4 is the same as in Conventional Example 3.
- the number of stacked iron cores 21 is 2715, and the weight thereof is shown in Table 15.
- the primary winding of this transformer uses a copper wire with a diameter of 1.3 mm and is wound for 1509 turns, and the secondary winding uses a flat wire of 4.0 mm x 13 mm made of aluminum and has 44 turns each. The windings of were connected in parallel.
- Example 7 From Table 15, in Example 7, the no-load loss per weight of the iron core was 0.161 W / kg, which was reduced by about 37% from the no-load loss per weight of the iron core of Conventional Example 4 of 0.256 W / kg. I understand.
- the ratio of the conventional example 4 to the energy consumption efficiency standard value defined in JIS C 4304: 2013 is 0.72, whereas that of the seventh embodiment is improved to 0.66. It can be seen that the annual CO 2 emissions are also improved by about 24% when the average equivalent load ratio of the distribution transformer is 15%. Further, the no-load loss per weight of the iron core in Example 5 was 0.180 W / kg, whereas in Example 7, it was 0.161 W / kg, which is an improvement of 0.019 W / kg. This is decreasing for the reasons described in Example 6.
- Example 8> Another example of the configuration of the iron core and the winding of the transformer of this embodiment is shown in FIG.
- This transformer is composed of a three-phase three-legged iron core (combination of three orbital iron cores), which is a combination of a plurality of laminated Fe-based amorphous alloy strips bent and overlapped with an orbital iron core 21. , With three sets of windings 22 wound around an iron core.
- the main characteristics and weight of an oil-filled transformer (hereinafter referred to as Example 8) having a three-phase 50 Hz and a rated capacity of 100 kVA according to the present disclosure in accordance with JIS C 4304: 2013 using the iron core of this embodiment are the same as those of the conventional example 5.
- a comparison is shown in Table 16.
- Example 8 The Fe-based amorphous alloy strip used in Example 8 is the same as in Example 6, and the Fe-based amorphous alloy strip used in Conventional Example 5 is the same as in Conventional Example 3.
- Example 8 the number of stacked iron cores 21 is 3480, and the weight (total of the three circular iron cores) is shown in Table 16.
- the primary winding of Example 8 uses a copper wire having a diameter of 2.2 mm and is wound with a star-shaped connection for 653 turns, and the secondary winding uses a flat wire of 0.4 mm ⁇ 247 mm made of aluminum. , 36 turns of winding with triangular connection.
- the primary winding of Conventional Example 5 uses a copper wire having a diameter of 2.2 mm and is wound with a star-shaped connection for 653 turns, and the secondary winding is a flat wire of 0.4 mm ⁇ 248 mm made of aluminum. It was used and had a 36-turn winding with a triangular connection.
- Example 8 From Table 16, in Example 8, the no-load loss per weight of the iron core was 0.188 W / kg, which was reduced by about 30% from the no-load loss per weight of the iron core of Conventional Example 5 of 0.269 W / kg. I understand.
- the ratio of the conventional example 5 to 0.78 is 0.78 with respect to the energy consumption efficiency standard value defined in JIS C 4304: 2013, but in the eighth embodiment, it is improved to 0.72. It can be seen that the annual CO 2 emissions are also improved by about 21% when the average equivalent load ratio of the distribution transformer is 15%.
- Example 9 As another example of the transformer having the iron core and winding configuration of the present embodiment shown in FIG. 34, an oil-filled transformer having a three-phase 60 Hz and a rated capacity of 100 kVA according to the present disclosure in accordance with JIS C 4304: 2013 (hereinafter, The main characteristics and weight of Example 9) are shown in Table 17 in comparison with Conventional Example 6.
- Example 9 The Fe-based amorphous alloy strip used in Example 9 is the same as in Example 6, and the Fe-based amorphous alloy strip used in Conventional Example 6 is the same as in Conventional Example 3.
- the number of laminated iron cores 21 is 2895, and the weight thereof is shown in Table 17.
- the primary and secondary windings of this transformer were the same as in Example 8 and Conventional Example 5.
- Example 9 the no-load loss per weight of the iron core was 0.238 W / kg, which was reduced by about 30% from the no-load loss per weight of the iron core of Conventional Example 6 of 0.339 W / kg. I understand.
- the ratio of the conventional example 6 is 0.81 to the energy consumption efficiency standard value defined in JIS C 4304: 2013, whereas that of the ninth embodiment is improved to 0.76. It can be seen that the annual CO 2 emissions are also improved by about 21% when the average equivalent load ratio of the distribution transformer is 15%.
- Example 10 As another example of the transformer having the iron core and winding configuration of the present embodiment shown in FIG. 34, an oil-filled transformer having a three-phase 50 Hz and a rated capacity of 500 kVA according to the present disclosure in accordance with JIS C 4304: 2013 (hereinafter, The main characteristics and weight of Example 10) are shown in Table 18 in comparison with Conventional Example 7.
- Example 10 The Fe-based amorphous alloy strip used in Example 10 is the same as in Example 6, and the Fe-based amorphous alloy strip used in Conventional Example 7 is the same as in Conventional Example 3.
- the circular iron core 21 has 5685 laminated iron cores in the tenth embodiment and 5955 in the conventional example 7, and the weights (total of the three circular iron cores) are shown in the table. 18 is shown.
- the primary winding of Example 10 uses a 3.5 mm ⁇ 4.5 mm flat copper wire and is wound with a star-shaped connection for 399 turns, and the secondary winding is made of aluminum of 1.3 mm ⁇ 438 mm.
- a flat wire was used, and a triangular connection was used to make a 22-turn winding.
- the primary winding of Conventional Example 7 uses a 3.2 mm ⁇ 5.0 mm flat copper wire and is wound 381 turns with a star-shaped connection, and the secondary winding is made of aluminum 1.4 mm ⁇ 383 mm.
- the flat wire of No. 1 was used, and the winding was made with a triangular connection for 21 turns.
- Example 10 the no-load loss per weight of the iron core was 0.163 W / kg, which was reduced by about 34% from the no-load loss per weight of the iron core of Conventional Example 7 of 0.246 W / kg. I understand.
- the ratio of the conventional example 7 to 0.93 is 0.93 with respect to the energy consumption efficiency standard value defined in JIS C 4304: 2013, whereas in the tenth embodiment, it can be improved to 0.90. It can be seen that the annual CO 2 emissions are also improved by about 18% when the average equivalent load ratio of the distribution transformer is 15%. Further, the no-load loss per weight of the iron core in Example 8 was 0.188 W / kg, whereas in Example 10, it was 0.163 W / kg, which is an improvement of 0.025 W / kg. The reason for this is that due to the increase in size of the iron core, the ratio of the length of the curved portion to the magnetic path length of the iron core becomes small, and no load loss due to the residual stress of the curved portion of the iron core is suppressed.
- FIG. 35 shows another example of the configuration of the iron core and the winding of the transformer of the present embodiment.
- This transformer consists of a three-phase five-legged iron core, which is a combination of a plurality of laminated Fe-based amorphous alloy strips bent and wound in an overlapping manner, and three sets of iron cores wound around the iron core.
- the winding 22 is provided.
- Example 11 The main characteristics and weight of an oil-filled transformer (hereinafter referred to as Example 11) having a three-phase 50 Hz and a rated capacity of 1000 kVA according to the present disclosure based on JIS C 4304: 2013 using the iron core of this embodiment are the same as those of the conventional example 8. A comparison is shown in Table 19.
- Example 11 The Fe-based amorphous alloy strip used in Example 11 is the same as in Example 6, and the Fe-based amorphous alloy strip used in Conventional Example 8 is the same as in Conventional Example 3.
- the circumferential iron core 21 is formed by stacking two iron cores having 2610 layers in the vertical direction of FIG. 35, and the weight thereof (of the eight circular iron cores). Total) is shown in Table 19.
- the primary winding of Example 11 uses a 2.8 mm ⁇ 7.0 mm flat copper wire and is wound 377 turns with a triangular connection, and the secondary winding is a 3.0 mm ⁇ 305 mm flat angle made of aluminum. A wire was used, and a 12-turn winding was made with a triangular connection. Further, the primary winding of Conventional Example 8 uses a flat copper wire of 2.8 mm ⁇ 7.0 mm and is wound for 377 turns with a triangular connection, and the secondary winding is made of aluminum of 3.2 mm ⁇ 306 mm. A flat wire was used, and a 12-turn winding was made with a triangular connection.
- Example 11 the no-load loss per weight of the iron core was 0.179 W / kg, which was reduced by about 33% from the no-load loss per weight of the iron core of Conventional Example 8 of 0.269 W / kg.
- the ratio of the conventional example 8 is 1.00 to the energy consumption efficiency standard value defined in JIS C 4304: 2013, whereas that of the example 11 is improved to 0.99. It can be seen that the annual CO 2 emissions are also improved by about 16% when the average equivalent load ratio of the distribution transformer is 15%.
- the transformer of the present disclosure can reduce no-load loss, and is particularly effective in reducing loss and CO 2 emissions of distribution transformers having a low average equivalent load factor. Is. Although the application to the wound iron core transformer has been described in detail in this embodiment, it goes without saying that the effect of reducing the no-load loss can be obtained even in the case of the product core transformer.
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Abstract
Description
本開示の第一実施形態のFe基アモルファス合金薄帯は、第1面と第2面とを有する。Fe基アモルファス合金薄帯は、少なくとも第1面に、連続した線状のレーザ照射痕を複数有する。線状レーザ照射痕は、Fe基アモルファス合金薄帯の鋳造方向に直交する方向に沿って設けられる。線状レーザ照射痕は、表面に凹凸を有し、凹凸を鋳造方向に評価したとき、Fe基アモルファス合金薄帯の厚さ方向における最高点と最低点との高低差HLと、第1面における線状レーザ照射痕の鋳造方向の長さである幅WAとから算出される高低差HL×幅WAが6.0~180μm2である。
ところで、例えば国際公開第2012/102379号に記載のとおり、従来、自由凝固面に波状凹凸を設けることにより、鉄損を低減させることが行われていた。
本開示のFe基アモルファス合金薄帯の化学組成には特に制限はなく、Fe基アモルファス合金の化学組成(即ち、Fe(鉄)を主成分とする化学組成)であればよい。但し、本開示のFe基アモルファス合金薄帯による効果をより効果的に得る観点から、本開示のFe基アモルファス合金薄帯の化学組成は、以下の化学組成Aであることが好ましい。好ましい化学組成である化学組成Aは、Fe、Si、B、及び不純物からなり、Fe、Si、及びBの合計含有量を100原子%とした場合に、Feの含有量が78原子%以上であり、Bの含有量が10原子%以上であり、B及びSiの合計含有量が17原子%~22原子%である化学組成である。
本開示のFe基アモルファス合金薄帯の厚さには特に制限なはいが、厚さは、好ましくは18μm~35μmである。
前述したとおり、本開示のFe基アモルファス合金薄帯では、線状レーザ照射痕の形成による磁区の細分化により、周波数60Hz及び磁束密度1.45Tの条件における鉄損CLが低減される。
前述したとおり、本開示のFe基アモルファス合金薄帯では、周波数60Hz及び磁束密度1.45Tの条件における励磁電力VAの上昇が抑制される。線状レーザ照射痕の高低差が大きくなっていくと、この励磁電力VAも大きくなっていく傾向にある。例えば、高低差が2.5μm以下とすることにより、大幅な励磁電力VAの増大を抑制することができる。
前述したとおり、本開示のFe基アモルファス合金薄帯では、周波数60Hz及び磁束密度1.45Tの条件における保磁力Hcが低減される。
前述したとおり、本開示のFe基アモルファス合金薄帯では、従来の条件である磁束密度1.3Tよりも高い磁束密度である、磁束密度1.45Tの条件における鉄損及び励磁電力を低く抑えることができる。
上述した本開示のFe基アモルファス合金薄帯は、好ましくは以下の製法によって製造することができる。
Fe基アモルファス合金からなり、自由凝固面及びロール面を有する素材薄帯の自由凝固面及びロール面の少なくとも一方面に対し、CW(連続波)発振方式を用いたレーザを照射して、複数の線状レーザ照射痕を有するFe基アモルファス合金薄帯を得るFe基アモルファス合金薄帯の製造方法であり、
CW(連続波)発振方式を用いたレーザのレーザ密度が、5J/m以上35J/m以下であり、
線状レーザ照射痕は、連続した線状であり、Fe基アモルファス合金薄帯の鋳造方向に直交する幅方向に向かう方向に沿って設けられる、Fe基アモルファス合金薄帯の製造方法である。
本実施形態では、レーザ加工工程の前に、素材準備工程を設けても良い。素材準備工程は、自由凝固面及びロール面を有する素材薄帯を準備する工程である。
本実施形態におけるレーザ加工工程では、素材薄帯の自由凝固面及びロール面の少なくとも一方面に対し、CW(連続波)発振方式を用いたレーザ加工により(即ち、CW(連続波)発振方式を用いたレーザを照射することにより)、連続した線状のレーザ照射痕を複数形成する。
本開示の鉄心は、既述の本開示のFe基アモルファス合金薄帯を複数重ねて積層したものであり、具体的には、Fe基アモルファス合金薄帯が積層され、積層されたFe基アモルファス合金薄帯が曲げられてオーバーラップ巻きされたものである。そして、本開示の鉄心は、周波数60Hz及び磁束密度1.45Tの条件における鉄損が0.240W/kg以下である。好ましくは0.230W/kg以下であり、より好ましくは0.200W/kg以下であり、更に好ましくは0.180W/kg以下である。
本開示の変圧器は、既述の本開示のFe基アモルファス合金薄帯を用いた鉄心と、鉄心に巻き回されたコイルと、を備えており、鉄心は、積層されたFe基アモルファス合金薄帯が曲げられてオーバーラップ巻きされており、周波数60Hz及び磁束密度1.45Tの条件における鉄損が0.240W/kg以下である。
<素材薄帯(レーザ加工される前のFe基アモルファス合金薄帯)の製造>
単ロール法により、Fe82Si4B14の化学組成を有し、厚さが25μmであり、幅が210mmである素材薄帯(即ち、レーザ加工される前のFe基アモルファス合金薄帯)を製造した。
素材薄帯からサンプル片を切り出し、切り出したサンプル片に対してレーザ加工を施すことにより、レーザ加工されたFe基アモルファス合金薄帯片を得た。
レーザ発振器としては、IPGフォトニクス社のファイバーレーザ(YLR-150-1500-QCW)を使用した。このレーザ発振器のレーザ媒質はYbドープのガラスファイバーであり、発振波長は1064nmである。
レーザ加工されたFe基アモルファス合金薄帯(図1中の薄帯10)について、370℃、20分、3000A/mの条件で磁場中熱処理(窒素雰囲気)を行い、その後、以下の測定及び評価を行った。結果を表1~4に示す。
レーザ加工されたFe基アモルファス合金薄帯の自由凝固面中、線状レーザ照射痕12以外の部分(即ち、非レーザ加工領域)について、JIS B 0601:2001に準拠し、評価長さを4.0mmとし、カットオフ値を0.8mmとし、カットオフ種別を2RC(位相補償)として、最大断面高さRtを測定した。なお、最大断面高さRtの測定は、レーザ加工前に行うこともできる。ここで、評価長さの方向は、素材薄帯の鋳造方向となるように設定した。評価長さを4.0mmとする上記測定は、詳細には、カットオフ値0.8mmにて連続して5回測定することにより行った。
レーザ加工されたFe基アモルファス合金薄帯について、周波数60Hz及び磁束密度1.45Tの条件、並びに、周波数60Hz及び磁束密度1.50Tの条件の2条件にて、鉄損CLを、交流磁気測定器により正弦波励磁で測定した。
レーザ加工されたFe基アモルファス合金薄帯について、周波数60Hz及び磁束密度1.45Tの条件、並びに、周波数60Hz及び磁束密度1.50Tの条件の2条件にて、励磁電力VAを、交流磁気測定器により正弦波励磁で測定した。
レーザ加工されたFe基アモルファス合金薄帯について、周波数60Hz及び磁束密度1.45Tの条件、並びに、周波数60Hz及び磁束密度1.50Tの条件の2条件にて、保磁力Hcを、交流磁気測定器により正弦波励磁で測定した。
レーザ照射された面Aの線状レーザ照射痕とレーザ照射された面Aの裏面Bの線状レーザ照射痕とをレーザ顕微鏡で観察し、レーザ照射された面Aの線状レーザ照射痕(溶融凝固部)の幅WAと、レーザ照射された面Aの裏面Bの線状レーザ照射痕の幅WBとを測定した。なお、線状レーザ照射痕(溶融凝固部)は、溶融凝固したことにより、見かけの状態が変化している部分であり、この見かけの状態が変化している部分の幅を線状レーザ照射痕(溶融凝固部)の幅とした。なお、レーザ照射された面Aの裏面Bの線状レーザ照射痕は観察されないものもあった。その場合、幅WBは0μmとした。
レーザ照射された面Aの線状レーザ照射痕(溶融凝固部)は、表面に凹凸が形成されていた。この表面の凹凸状態を溶融凝固部の幅方向(鋳造方向に相当する)に観察した。観察方法は、レーザ顕微鏡(上記したカラー3Dレーザ顕微鏡VK-8710、倍率も同じ)を用いた。具体的には、レーザ顕微鏡で線状レーザ照射痕の幅方向のプロファイルを計測する。図2に、線状レーザ照射痕の顕微鏡写真を示す。図2に示すように、線状レーザ照射痕の幅WAに対し、それぞれ略30μmの幅を前後に加え、その間(30μm+幅WA+30μm)のプロファイルを計測する。このプロファイルは、図3に示したような形態である。このプロファイルから高低差HLを測定した。なお、プロファイルが傾いている場合は、前後に加えた30μmの範囲を利用して、水平方向となるように傾きを直線補正して、測定した。
レーザ加工を行わなかったこと以外は実施例1と同様の操作を行った。
表1~4に示す試料を用いて、熱処理を行う前の特性を評価した。その結果を表7に示す。なお、表7のNoは表1~4のNoに対応している。この特性の評価は、最大印加磁場800A/mで測定した直流B-H曲線から求めた値である。
実施例1の試料を用いて、周波数1kHz及び磁束密度1Tの条件で、鉄損CL、励磁電力VAを評価した。その結果を表8に示す。なお、表8のNoは表1~4のNoに対応している。
<線状レーザ照射痕をロール面に形成>
実施例1で用いた素材薄帯と同じ素材薄帯を用い、ライン間隔LP1を20mm、走査速度を5m/sec、レーザ密度を10J/mの条件で、素材薄帯のロール面に線状レーザ照射痕を形成した。この線状レーザ照射痕の観察写真を図32に示す。なお、熱処理条件は実施例1と同様である。
実施例1と同様にして、Fe基アモルファス合金薄帯(化学組成:Fe82Si4B14、厚さ:25μm、幅:142mm)を得て、ライン間隔LP1が20mm、走査速度が8m/sec、レーザ密度が17J/mの条件で線状レーザ照射痕を形成し、Fe基アモルファス合金薄帯片を作成した。線状レーザ照射痕の状態を表9に示す。実施例3では、幅WAが70.5μmで、幅WBは0μmであった。また、レーザ照射された面Aの線状レーザ照射痕の凹凸状態は、高低差HLが0.44μmであり、高低差HL×幅WAは31.02μm2であった。また、レーザ照射された面Aの裏面Bでは、線状レーザ照射痕が観察されず、応力皺は無かった。
また、比較例2として、線状レーザ照射痕を形成しなかった薄帯片を用いたこと以外、上記と同様にして製造した鉄心に対して同様の測定、評価を行った。
式2:励磁電力(VA/kg)=E・I/M
式3:鉄損(W/kg)=Watt/M
なお、式1~式3中の記号の詳細は、以下の通りである。
LF:占積率(=0.88)
C :コア積厚(mm)
W :使用リボン公称幅(mm)
N1:励磁コイル巻回数
f :測定周波数(Hz)
Bm:最大磁束密度又は規定の磁束密度
I :電力計測定実効電流(A)
M :コア重量(kg)
Watt:電力計測定電力(W)
本実施形態の変圧器の鉄心と巻線の構成の1例を図33に示す。この変圧器は、積層された複数枚のFe基アモルファス合金薄帯を曲げてオーバーラップ巻きされた周回状の鉄心21と、鉄心に巻き回された巻線22とを備える。この第1の実施形態の鉄心は、1つの周回状の鉄心(単相2脚巻鉄心)から構成されている。この実施形態の鉄心を用いたJIS C 4304:2013に準拠した本開示による単相50Hz、定格容量10kVAの油入り変圧器(以下、実施例4)の主な特性と重量を従来例1との比較で表12に示す。ここで、実施例4に使用したFe基アモルファス合金薄帯は上記特性を有することから、JIS C 2534:2017の「5アモルファス帯の種類の記号」の定義に従い25AMP06-88と表記した。従来例1で使用したFe基アモルファス合金薄帯は25AMP08-88である。なお、以下の実施例4から実施例11の特性は、シミュレーションによる解析で得られた数値である。
図33に示す本実施形態の鉄心と巻線の構成の変圧器の第2の実施例として、JIS C 4304:2013に準拠した本開示による単相60Hz、定格容量10kVAの油入り変圧器(以下、実施例5)の主な特性と重量を従来例2との比較で表13に示す。
図33に示す本実施形態の鉄心と巻線の構成の変圧器の第3の実施例として、JIS C 4304:2013に準拠した本開示による単相50Hz、定格容量30kVAの油入り変圧器(以下、実施例6)の主な特性と重量を従来例3との比較で表14に示す。
図33に示す本実施形態の鉄心と巻線の構成の変圧器の第4の実施例として、JIS C 4304:2013に準拠した本開示による単相60Hz、定格容量30kVAの油入り変圧器(以下、実施例7)の主な特性と重量を従来例4との比較で表15に示す。
本実施形態の変圧器の鉄心と巻線の構成の別の例を図34に示す。この変圧器は、積層された複数枚のFe基アモルファス合金薄帯を曲げてオーバーラップ巻きされた周回状の鉄心21を組み合わせた3相3脚巻鉄心(3つの周回状の鉄心の組み合わせ)と、鉄心に巻き回された3組の巻線22とを備える。この実施形態の鉄心を用いたJIS C 4304:2013に準拠した本開示による3相50Hz、定格容量100kVAの油入り変圧器(以下、実施例8)の主な特性と重量を従来例5との比較で表16に示す。
図34に示す本実施形態の鉄心と巻線の構成の変圧器の別の実施例として、JIS C 4304:2013に準拠した本開示による3相60Hz、定格容量100kVAの油入り変圧器(以下、実施例9)の主な特性と重量を従来例6との比較で表17に示す。
図34に示す本実施形態の鉄心と巻線の構成の変圧器の別の実施例として、JIS C 4304:2013に準拠した本開示による3相50Hz、定格容量500kVAの油入り変圧器(以下、実施例10)の主な特性と重量を従来例7との比較で表18に示す。
本実施形態の変圧器の鉄心と巻線の構成の別の例を図35に示す。この変圧器は、積層された複数枚のFe基アモルファス合金薄帯を曲げてオーバーラップ巻きされた周回状の鉄心21を組み合わせた3相5脚巻鉄心と、鉄心に巻き回された3組の巻線22とを備える。
Claims (32)
- 第1面と第2面とを有するFe基アモルファス合金薄帯であって、
少なくとも前記第1面に、連続した線状のレーザ照射痕を複数有し、
前記線状レーザ照射痕は、前記Fe基アモルファス合金薄帯の鋳造方向に直交する方向に沿って設けられ、
前記線状レーザ照射痕は、表面に凹凸を有し、前記凹凸を前記鋳造方向に評価したとき、前記Fe基アモルファス合金薄帯の厚さ方向における最高点と最低点との高低差HLと、前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAとから算出される高低差HL×幅WAが6.0~180μm2である、Fe基アモルファス合金薄帯。 - 前記幅WAが28μm以上である、請求項1に記載のFe基アモルファス合金薄帯。
- 前記高低差HLが0.20μm以上である、請求項1に記載のFe基アモルファス合金薄帯。
- 前記線状レーザ照射痕は、前記第1面へのレーザ照射により溶融凝固した溶融凝固部であり、前記第1面から前記第2面まで達しており、
前記幅WAと、前記第2面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WBとの幅比WB/WAが0.57以下である、請求項1に記載のFe基アモルファス合金薄帯。 - 第1面と第2面とを有するFe基アモルファス合金薄帯であって、
少なくとも前記第1面に、連続した線状のレーザ照射痕を複数有し、
前記線状レーザ照射痕は、前記Fe基アモルファス合金薄帯の鋳造方向に直交する方向に沿って設けられ、
前記線状レーザ照射痕は、前記第1面へのレーザ照射により溶融凝固した溶融凝固部であり、前記第1面から前記第2面まで達しており、
前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAと前記第2面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WBとの幅比WB/WAが0.57以下である、Fe基アモルファス合金薄帯。 - 前記線状レーザ照射痕は、表面に凹凸を有し、前記凹凸を前記鋳造方向に評価したとき、前記Fe基アモルファス合金薄帯の厚さ方向における最高点と最低点との高低差HLと、前記幅WAとから算出される高低差HL×幅WAが6.0~180μm2である、請求項5に記載のFe基アモルファス合金薄帯。
- 前記高低差HLが0.20μm以上である、請求項6に記載のFe基アモルファス合金薄帯。
- 第1面と第2面とを有するFe基アモルファス合金薄帯であって、
少なくとも前記第1面に、連続した線状のレーザ照射痕を複数有し、
前記線状レーザ照射痕は、前記Fe基アモルファス合金薄帯の鋳造方向に直交する方向に沿って設けられ、
前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAが28.5μm以上90μm以下である、Fe基アモルファス合金薄帯。 - 複数の前記線状レーザ照射痕のうち、互いに隣り合う線状レーザ照射痕間の間隔をライン間隔とした場合に、前記ライン間隔が2mm~200mmである、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 前記線状レーザ照射痕が設けられた部分は、非晶質である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 前記鋳造方向に直交する方向を幅方向としたとき、前記幅方向において、前記Fe基アモルファス合金薄帯の長さ全体に占める前記線状レーザ照射痕の長さの割合が、前記Fe基アモルファス合金薄帯の前記幅方向の中心から前記幅方向両端に向かう方向にそれぞれ10%~50%の範囲内である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 前記第1面及び前記第2面として自由凝固面及びロール面を有し、
前記自由凝固面における前記線状レーザ照射痕以外の部分の最大断面高さRtが、3.0μm以下である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。 - 厚さが18μm~35μmである、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 前記Fe基アモルファス合金薄帯の合金組成は、Fe、Si、B、及び不純物からなり、Fe、Si、及びBの合計含有量を100原子%とした場合に、Feの含有量が78原子%以上であり、Bの含有量が10原子%以上であり、B及びSiの合計含有量が17原子%~22原子%である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 周波数60Hz及び磁束密度1.45Tの条件における鉄損が0.150W/kg以下である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 周波数1kHz及び磁束密度1Tの条件における鉄損が8.6W/kg以下であり、励磁電力VAが8.7VA/kg以下である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 最大印加磁場800A/mで測定した直流B-H曲線の保磁力Hcが5.0A/m以下である、請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯。
- 最大印加磁場800A/mで測定した直流B-H曲線の角型比〔残留磁束密度Br/最大磁束密度Bm〕が40%以下である、請求項17に記載のFe基アモルファス合金薄帯。
- 第1面と第2面とを有するFe基アモルファス合金薄帯の少なくとも前記第1面に対し、CW(連続波)発振方式を用いたレーザを照射して、複数の線状レーザ照射痕を有するFe基アモルファス合金薄帯を得るFe基アモルファス合金薄帯の製造方法であって、
前記CW(連続波)発振方式を用いたレーザのレーザ密度が、5J/m以上35J/m以下であり、
前記線状レーザ照射痕は、前記Fe基アモルファス合金薄帯の鋳造方向に直交する方向に沿って設けられる、Fe基アモルファス合金薄帯の製造方法。 - 前記線状レーザ照射痕は、表面に凹凸を有し、前記凹凸を前記鋳造方向に評価したとき、前記Fe基アモルファス合金薄帯の厚さ方向における最高点と最低点との高低差HLと、前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAとから算出される高低差HL×幅WAが6.0~180μm2である、請求項19に記載のFe基アモルファス合金薄帯の製造方法。
- 前記線状レーザ照射痕は、前記第1面から前記第2面まで達しており、
前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAと前記第2面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WBとの幅比WB/WAが0.57以下である、請求項19又は請求項20に記載のFe基アモルファス合金薄帯の製造方法。 - 前記第1面における前記線状レーザ照射痕の前記鋳造方向の長さである幅WAが28μm以上である、請求項19又は請求項20に記載のFe基アモルファス合金薄帯の製造方法。
- 前記線状レーザ照射痕は、表面に凹凸を有し、前記凹凸を前記鋳造方向に評価したとき、前記Fe基アモルファス合金薄帯の厚さ方向における最高点と最低点との高低差HLが0.20~2.0μmである、請求項19又は請求項20に記載のFe基アモルファス合金薄帯の製造方法。
- 前記線状レーザ照射痕が設けられた部分は、非晶質である、請求項19又は請求項20に記載のFe基アモルファス合金薄帯の製造方法。
- 複数の前記線状レーザ照射痕のうち、互いに隣り合う線状レーザ照射痕間の間隔をライン間隔とした場合に、前記ライン間隔が2mm~200mmである、請求項19又は請求項20に記載のFe基アモルファス合金薄帯の製造方法。
- 複数の請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯が積層され、又は少なくとも1つの請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯が巻回されて構成される、鉄心。
- 積層された複数の前記Fe基アモルファス合金薄帯が曲げられてオーバーラップ巻きされて構成され、
周波数60Hz及び磁束密度1.45Tの条件における鉄損が0.240W/kg以下である、請求項26に記載の鉄心。 - 請求項1から請求項8のいずれか1項に記載のFe基アモルファス合金薄帯を用いた鉄心と、
前記鉄心に巻き回されたコイルと、
を備える、変圧器。 - 前記鉄心は、積層された複数の前記Fe基アモルファス合金薄帯が曲げられてオーバーラップ巻きされて構成され、周波数60Hz及び磁束密度1.45Tの条件における鉄損が0.240W/kg以下である、請求項28に記載の変圧器。
- 単相変圧器であり、50Hzにおける前記鉄心の重量当たりの無負荷損が0.15W/kg以下、又は60Hzにおける前記鉄心の重量当たりの無負荷損が0.19W/kg以下である、請求項28に記載の変圧器。
- 3相変圧器であり、50Hzにおける前記鉄心の重量当たりの無負荷損が0.19W/kg以下、又は60Hzにおける前記鉄心の重量当たりの無負荷損が0.24W/kg以下である、請求項28に記載の変圧器。
- 定格容量が10kVA以上である、請求項28に記載の変圧器。
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CA3144339A1 (en) * | 2019-06-28 | 2020-12-30 | Hitachi Metals, Ltd. | Fe-based amorphous alloy ribbon, iron core, and transformer |
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CN116144885A (zh) * | 2023-02-21 | 2023-05-23 | 深圳大学 | 表面晶化的铁基非晶合金带材的激光热处理方法和应用 |
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CA3144339A1 (en) | 2020-12-30 |
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US20220364212A1 (en) | 2022-11-17 |
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CN113994441A (zh) | 2022-01-28 |
ES2969754T3 (es) | 2024-05-22 |
PT3992994T (pt) | 2024-02-08 |
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US11802328B2 (en) | 2023-10-31 |
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US20220375666A1 (en) | 2022-11-24 |
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