EP0007994B1 - Magnetkern aus einer weichmagnetischen amorphen Legierung - Google Patents

Magnetkern aus einer weichmagnetischen amorphen Legierung Download PDF

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Publication number
EP0007994B1
EP0007994B1 EP79102173A EP79102173A EP0007994B1 EP 0007994 B1 EP0007994 B1 EP 0007994B1 EP 79102173 A EP79102173 A EP 79102173A EP 79102173 A EP79102173 A EP 79102173A EP 0007994 B1 EP0007994 B1 EP 0007994B1
Authority
EP
European Patent Office
Prior art keywords
core
magnetic
amorphous
crystalline
amorphous alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79102173A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0007994A1 (de
Inventor
Richard Dr. Phys. Boll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of EP0007994A1 publication Critical patent/EP0007994A1/de
Application granted granted Critical
Publication of EP0007994B1 publication Critical patent/EP0007994B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49034—Treating to affect magnetic properties

Definitions

  • the invention relates to a magnetic core made of a soft magnetic amorphous alloy.
  • Electromagnetic components with cores made of soft magnetic amorphous alloys are already known (DE-A-2546676 and 2 553 003).
  • amorphous metal alloys can be produced by cooling an appropriate melt so rapidly that solidification occurs without crystallization.
  • the alloys can be obtained in the form of thin strips, the thickness of which can be, for example, a few hundredths of a mm and the width of which can be from a few mm to several cm.
  • the amorphous alloys can be distinguished from the crystalline alloys by means of X-ray diffraction measurements. In contrast to crystalline materials, which show characteristic sharp diffraction lines, the intensity in the X-ray diffraction pattern with amorphous metal alloys changes only slowly with the diffraction angle, similarly as is the case with liquids or ordinary glass.
  • the amorphous alloys can be completely amorphous or comprise a two-phase mixture of the amorphous and the crystalline state.
  • an amorphous metal alloy is understood to mean an alloy which is at least 50%, preferably at least 80%, amorphous.
  • the so-called crystallization temperature For every amorphous metal alloy there is a characteristic temperature, the so-called crystallization temperature. If the amorphous alloy is heated to or above this temperature, it changes to the crystalline state in which it remains even after cooling. In the case of heat treatments below the crystallization temperature, however, the amorphous state is retained.
  • the previously known soft magnetic amorphous metal alloys have the composition MyX i -y, where M is at least one of the metals iron, cobalt and nickel, and X is at least one of the so-called glass-forming elements boron, carbon, silicon and phosphorus and y is between about 0.60 and 0.95.
  • the amorphous alloys can also contain other metals, in particular titanium, zircon, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, palladium, platinum, copper, silver or gold, while in addition to the Glass-forming elements X or, where appropriate, the elements aluminum, gallium, indium, germanium, tin, arsenic, antimony, bismuth or beryllium may be present instead of these.
  • the amorphous soft magnetic alloys are particularly suitable for the production of magnetic cores, since, as already mentioned, they can be produced directly in the form of thin strips without, as with the crystalline soft magnetic metal alloys customary in the art, a large number of rolling steps with numerous Intermediate annealing is required.
  • Cores with a sheared hysteresis loop are often used for various applications, for example for chokes.
  • shear is known to be achieved by providing an air gap at least at one point along the core, which extends over the entire core cross section at this point.
  • Such air gaps often have to be ground in in a relatively complex manner or the core has to be completely cut to produce the air gaps, as is the case, for example, with cutting tape cores, so that additional parts for holding the core together, for example tensioning straps, are required.
  • DE-A-1 514 333 From DE-A-1 514 333 a method for obtaining gap-like interruptions in magnetic materials is also known.
  • the known method consists in particular in changing the structure of the magnetic material at the desired point by irradiation with high-energy radiation in such a way that there is no ferro- or ferri-. has more magnetic properties. There is no indication of amorphous magnetic alloys in DE-A-1 514 333.
  • the object of the invention is to achieve a shear of the hysteresis loop in a simple manner with a magnetic core made of a soft magnetic amorphous alloy.
  • amorphous alloy is converted into the crystalline state by local heating at least at one point along the core at least over part of the core cross section at this point.
  • the amorphous soft magnetic alloys have a relatively high permeability in the amorphous state, the permeability is considerably reduced by the transition to the crystalline state through local overheating above the crystallization temperature. This results in a crystalline zone which extends at least over part of the core cross section at the heated point and acts in a manner similar to an air gap.
  • a completely amorphous soft magnetic alloy can preferably be used as the starting material.
  • Magnetic core can be provided one or more crystalline zones distributed over the core, the width of which may also vary over the core cross section.
  • the magnetic cores according to the application can be produced, for example, by winding an amorphous band into a core or by laminating sheets punched out of amorphous band into a core. Local heating above the crystallization temperature to produce the crystalline zone can then take place, for example, by means of an induction loop placed around the core at the appropriate point.
  • the magnetic cores can be heat-treated in a manner known per se, for example at a temperature below the crystallization temperature in the presence of a magnetic field which magnetizes the magnetic core approximately to saturation.
  • the magnetic field can be a transverse magnetic field or a longitudinal magnetic field.
  • the core can also be layered, for example, from sheets that have been previously at least one point has been converted into the crystalline state over all or part of its cross section.
  • the heating can take place, for example, by resistance heating between two metal cutting edges serving as contacts or also by laser beams.
  • Figures 1 to 4 each show a top view schematically different embodiments of a magnetic core according to the invention.
  • this permeability in the crystalline zone is reduced to approximately 500.
  • a 5 mm wide crystalline zone 2 therefore corresponds to an apparent air gap with a length of 0.01 mm. Since the average iron path length of the core is 78.5 mm for the dimensions mentioned above, the permeability of the sheared circle is approximately 7630.
  • FIG. 2 shows a further core, which can, for example, be stacked up from sheet metal or wound from tape in the form of a ring band core.
  • amorphous material 11 crystalline zones 12, which extend over the entire core cross section, are generated at four locations on the core circumference by local heating.
  • FIG. 3 shows a correspondingly constructed magnetic core, in which crystalline zones 22 are generated in the amorphous material 21 at two locations, the boundary surfaces of which are curved.
  • Such crystalline zones the width of which varies over the core cross section, can be used, for example, to achieve nonlinear characteristic curves.
  • FIG. 4 shows a magnetic core in which crystalline zones 32 are produced in the amorphous alloy 31 at two locations, each of which extends over only part of the core cross section.
  • the shear can be varied within wide limits by different selection of the crystalline zones. For example, flat hysteresis loops, perminvar-like loops, strongly sheared linear loops or non-linear characteristics can be achieved.
  • the cores can be glued in the usual way, used in protective troughs or cast.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP79102173A 1978-07-26 1979-06-29 Magnetkern aus einer weichmagnetischen amorphen Legierung Expired EP0007994B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782832731 DE2832731A1 (de) 1978-07-26 1978-07-26 Magnetkern aus einer weichmagnetischen amorphen legierung
DE2832731 1978-07-26

Publications (2)

Publication Number Publication Date
EP0007994A1 EP0007994A1 (de) 1980-02-20
EP0007994B1 true EP0007994B1 (de) 1981-11-25

Family

ID=6045392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102173A Expired EP0007994B1 (de) 1978-07-26 1979-06-29 Magnetkern aus einer weichmagnetischen amorphen Legierung

Country Status (5)

Country Link
US (1) US4265684A (ja)
EP (1) EP0007994B1 (ja)
JP (1) JPS5519899A (ja)
CA (1) CA1118326A (ja)
DE (2) DE2832731A1 (ja)

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US4889568A (en) * 1980-09-26 1989-12-26 Allied-Signal Inc. Amorphous alloys for electromagnetic devices cross reference to related applications
JPS5797606A (en) * 1980-12-10 1982-06-17 Kawasaki Steel Corp Manufacture of amorphous alloy thin belt having extremely low iron loss
JPS57169209A (en) * 1981-04-10 1982-10-18 Nippon Steel Corp Iron core for reactor and manufacture thereof
JPS57177507A (en) * 1981-04-24 1982-11-01 Hitachi Metals Ltd Heat treatment of amorphous material
JPS57193005A (en) * 1981-05-23 1982-11-27 Tdk Corp Amorphous magnetic alloy thin belt for choke coil and magnetic core for the same
JPS57197810A (en) * 1981-05-29 1982-12-04 Matsushita Electric Ind Co Ltd Amorphous magnetic core
JPS5856307A (ja) * 1981-09-29 1983-04-04 Fujitsu Ltd トランス用コア及びその製造方法
CA1205725A (en) * 1982-09-06 1986-06-10 Emiko Higashinakagawa Corrosion-resistant and wear-resistant amorphous alloy and a method for preparing the same
US4554029A (en) * 1982-11-08 1985-11-19 Armco Inc. Local heat treatment of electrical steel
GB2138215B (en) * 1983-04-13 1987-05-20 Hitachi Metals Ltd Amorphous wound coil
JPS59218714A (ja) * 1983-05-26 1984-12-10 Fuji Electric Co Ltd 高周波電力回路用電磁機器
KR890003043B1 (ko) * 1983-07-16 1989-08-19 알프스덴기 가부시기 가이샤 자기헤드
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US5038242A (en) * 1988-05-13 1991-08-06 Citizen Watch Co., Ltd. Magnetic head containing a barrier layer
JPH03242983A (ja) * 1990-02-06 1991-10-29 Internatl Business Mach Corp <Ibm> 磁気構造体の製造方法
US5560760A (en) * 1994-10-12 1996-10-01 The United States Of America As Represented By The United States Department Of Energy Method for optical and mechanically coupling optical fibers
DE19848827A1 (de) * 1998-10-22 2000-05-04 Vacuumschmelze Gmbh Vorrichtung zur Dämpfung von Störspannungen
US7040323B1 (en) * 2002-08-08 2006-05-09 Tini Alloy Company Thin film intrauterine device
DE10302646B4 (de) * 2003-01-23 2010-05-20 Vacuumschmelze Gmbh & Co. Kg Antennenkern und Verfahren zum Herstellen eines Antennenkerns
US7586828B1 (en) 2003-10-23 2009-09-08 Tini Alloy Company Magnetic data storage system
US7632361B2 (en) * 2004-05-06 2009-12-15 Tini Alloy Company Single crystal shape memory alloy devices and methods
US20060118210A1 (en) * 2004-10-04 2006-06-08 Johnson A D Portable energy storage devices and methods
US7763342B2 (en) * 2005-03-31 2010-07-27 Tini Alloy Company Tear-resistant thin film methods of fabrication
US7540899B1 (en) * 2005-05-25 2009-06-02 Tini Alloy Company Shape memory alloy thin film, method of fabrication, and articles of manufacture
US20070246233A1 (en) * 2006-04-04 2007-10-25 Johnson A D Thermal actuator for fire protection sprinkler head
US20080213062A1 (en) * 2006-09-22 2008-09-04 Tini Alloy Company Constant load fastener
US20080075557A1 (en) * 2006-09-22 2008-03-27 Johnson A David Constant load bolt
WO2008133738A2 (en) 2006-12-01 2008-11-06 Tini Alloy Company Method of alloying reactive components
WO2008092028A1 (en) * 2007-01-25 2008-07-31 Tini Alloy Company Frangible shape memory alloy fire sprinkler valve actuator
US8584767B2 (en) * 2007-01-25 2013-11-19 Tini Alloy Company Sprinkler valve with active actuation
US8007674B2 (en) 2007-07-30 2011-08-30 Tini Alloy Company Method and devices for preventing restenosis in cardiovascular stents
WO2009073609A1 (en) 2007-11-30 2009-06-11 Tini Alloy Company Biocompatible copper-based single-crystal shape memory alloys
US8382917B2 (en) 2007-12-03 2013-02-26 Ormco Corporation Hyperelastic shape setting devices and fabrication methods
US7842143B2 (en) * 2007-12-03 2010-11-30 Tini Alloy Company Hyperelastic shape setting devices and fabrication methods
US11040230B2 (en) 2012-08-31 2021-06-22 Tini Alloy Company Fire sprinkler valve actuator
US10124197B2 (en) 2012-08-31 2018-11-13 TiNi Allot Company Fire sprinkler valve actuator
US10371550B2 (en) * 2016-10-24 2019-08-06 Ademco Inc. Compact magnetic field generator for magmeter
DE102016223195A1 (de) * 2016-11-23 2018-05-24 Robert Bosch Gmbh Transformatorvorrichtung, Transformator und Verfahren zur Herstellung einer Transformatorvorrichtung
JP6919517B2 (ja) * 2017-11-20 2021-08-18 トヨタ自動車株式会社 アモルファス系又はナノ結晶系軟磁性材料を用いた磁性部品の製造方法
JP7196692B2 (ja) * 2019-03-05 2022-12-27 トヨタ自動車株式会社 合金薄帯片の製造方法
JP7047798B2 (ja) * 2019-03-05 2022-04-05 トヨタ自動車株式会社 合金薄帯片の製造方法
JP7255452B2 (ja) * 2019-10-30 2023-04-11 トヨタ自動車株式会社 合金薄帯片およびその製造方法

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Also Published As

Publication number Publication date
DE2961439D1 (en) 1982-01-28
DE2832731A1 (de) 1980-02-07
JPS5519899A (en) 1980-02-12
US4265684A (en) 1981-05-05
CA1118326A (en) 1982-02-16
EP0007994A1 (de) 1980-02-20

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