EP0557689B1 - Verfahren zur Herstellung eines magnetischen Impulsgebers - Google Patents

Verfahren zur Herstellung eines magnetischen Impulsgebers Download PDF

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Publication number
EP0557689B1
EP0557689B1 EP93100179A EP93100179A EP0557689B1 EP 0557689 B1 EP0557689 B1 EP 0557689B1 EP 93100179 A EP93100179 A EP 93100179A EP 93100179 A EP93100179 A EP 93100179A EP 0557689 B1 EP0557689 B1 EP 0557689B1
Authority
EP
European Patent Office
Prior art keywords
iron alloy
composite body
process according
heat treatment
transition temperature
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 - Lifetime
Application number
EP93100179A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0557689A2 (de
EP0557689A3 (fi
Inventor
Gernot Dr. Hausch
Christian Dr. Radeloff
Gerd Dipl.-Phys. Rauscher
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 EP0557689A2 publication Critical patent/EP0557689A2/de
Publication of EP0557689A3 publication Critical patent/EP0557689A3/xx
Application granted granted Critical
Publication of EP0557689B1 publication Critical patent/EP0557689B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F1/143—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of wires
    • 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
    • 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
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0304—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions adapted for large Barkhausen jumps or domain wall rotations, e.g. WIEGAND or MATTEUCCI effect
    • 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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • 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
    • C21D2251/00—Treating composite or clad material
    • 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
    • C21D2251/00—Treating composite or clad material
    • C21D2251/02—Clad material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F2003/106—Magnetic circuits using combinations of different magnetic materials
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12937—Co- or Ni-base component next to Fe-base component

Definitions

  • the invention relates to a method for manufacturing one due to sudden magnetic reversal when applied Magnetic field acting pulse generator, which consists of an elongated Composite body made of at least two materials exists, the different thermal expansion behavior and mechanically by heat treatment against each other.
  • Such a pulse generator as a composite is in the DE-PS 31 52 008 described.
  • This composite body contains a core and a shell, some of whose materials or all made of magnetic materials with different Coercivity can exist.
  • Using two magnetic materials with different Coercivity is for the magnetically harder Material, for example, an alloy in the range of 45 up to 55% by weight cobalt, 30 to 50% by weight iron and 4 to 14 wt .-% (chrome + vanadium) used, while as soft magnetic material nickel is provided.
  • This known composite body lies as an elongated one magnetic switch core.
  • DE-OS 34 11 079 is used to manufacture the composite body a combination of hard and soft magnetic Alloys used. From DE-PS 31 52 008 to this known that the hard magnetic component at the same time serve to brace the soft magnetic component can. This construction has the advantage of being a wire with a coat of high strength and that one can provide relatively short wires.
  • the object of the present invention is a method specify for the manufacture of such a pulse generator, that without additional procedural steps between the Materials of the composite body much higher Voltages and thus significantly higher voltage pulses in the case of sudden magnetic reversal of the active component results.
  • the invention also achieves the object premagnetization in addition to the improved pulse behavior of the magnetically active part of the composite body to be realized with sufficient coercive field strength, without an additional strip of permanent magnetic Material must be provided.
  • This object is achieved in that an iron alloy is used for one of the materials the additional alloy components are selected in this way are that at different temperatures one Structural transformation with volume change takes place that a elongated composite body made of the materials and that as a heat treatment this composite body first heated above the upper transition temperature and later is cooled below the lower transition temperature.
  • phase change e.g. from the alpha phase (body-centered cubic grid) in the gamma phase (face-centered cubic lattice) or in understand the epsilon phase (hexagonal grid) and vice versa.
  • a wire is shown as a composite body in FIG Core made of a soft magnetic material 1 and its jacket consists of an iron alloy 2.
  • the coercive force the iron alloy 2 is higher than that of soft magnetic material 1.
  • the soft magnetic material 1 made of an alloy with 75.5 Ni 2.9 Mo 3.0 Ti 1.0 Nb rest Fe.
  • the Ti and the Nb serve as a hardening additive to make one slight plastic deformation of the soft magnetic material to exclude.
  • This soft magnetic material has magnetostriction greater than zero, d. H. the material stretches in the direction of magnetization. For this reason the desired jumping behavior is achieved when the manufacture pulse generator of soft magnetic material 1 under Tension is there.
  • the jacket is made from a Iron alloy manufactured at different Temperatures undergo structural changes.
  • it is a martensitic curing commercially available Steel as it is known, for example ARMCO 17-4PH is known.
  • PRODUCT DATA from Armco Steel Corporation, Baltimore, Maryland, No. S-6c.
  • This iron alloy shows - how many other known steels too - structural transformation points between the so-called alpha and gamma structure.
  • the temperature behavior is on page 11 of the mentioned brochure and shown in Fig. 7 of the drawing.
  • this behavior is used to to produce a pulse generator that is particularly high mechanical bracing of the component of a composite body reached that with a certain magnetic field experience sudden magnetic reversal (Barkhausen jump) should.
  • the composite body 3 in the exemplary embodiment 1 to a temperature above 750 ° C. heated and then cooled below 100 ° C.
  • the soft magnetic material 1 and the iron alloy 2 is initially approximately uniform expand (depending on their coefficient of thermal expansion). If the upper transition temperature of the Iron alloy is reached, the soft magnetic tries Expand material further while the Iron alloy shrinks or expands less. This creates a pressure load in the soft magnetic material 1 and a tensile stress in the iron alloy 2.
  • both the volume of the soft magnetic material 1 and that of Iron alloy 2 continuously up to one Temperature below 300 ° C.
  • certain mechanical stresses that are known in prior Pulse generators for biasing the magnetic active material are used, but not here are essential, although they are supportive can.
  • the lower transition temperature is below about 600 ° C, since then it is rather guaranteed is that the stresses brought in by Relaxation processes or plastic deformation reduced will.
  • FIG. 3 A corresponding magnetization curve is shown in FIG. 3 shown.
  • the field strength control changed between ⁇ 80 A / cm.
  • a field strength that is sufficient around the iron alloy used here as a jacket also completely re-magnetize.
  • Fig. 5 is now the voltage on the ordinate and the Time in microseconds plotted on the abscissa.
  • a composite wire with a length of 20 mm from a winding surrounded with 1000 turns.
  • the magnetic reversal took place through an alternating current at 50 Hz in a separate Excitation coil, which was set so that the field strength was 5 A / cm along the composite wire.
  • a voltage pulse of approximately 0.95 V can be achieved here, which, however, because of the asymmetry of the hysteresis loop with magnetized iron alloy only in every second half-wave occurs.
  • the composite body now shows the voltage pulse of the composite body 1 with a diameter of 0.2 mm and one Length of 90 mm in a coil of 1500 turns and also 90 mm in length after heating the composite body for 6 seconds to 1100 ° C and then cooling.
  • the composite body can be smaller Level control operated, for example, 0.8 A / cm because the core has a low coercive force of about 0.1 A / cm.
  • the impulse achieved here magnetized iron alloy 2 is shown in Fig. 6 with the amorphous wire compared to US-PS 46 60 025.
  • the Curve 4 gives the voltage pulse of the amorphous wire and the curve 5 again the voltage pulse, which is in the pulse generator produced according to the invention results.
  • the iron alloy as Jacket and the soft magnetic material as the core of one Wire is used, you can - as with the acquaintance - also use other materials by plating etc.
  • Flat, elongated composite bodies are particularly obtained advantageous by rolling the finished wire before Heat treatment.
  • To use the iron alloy as a jacket offers the advantage of having a solid surface receives.
  • the finished composite wire can after the heat treatment according to the invention for at least 10 minutes at a temperature of 360 anneal to 750 ° C. With the resulting improvement in strength the iron alloy is then also obtained a further increasing coercive field strength.
  • the strength-enhancing additives in the soft magnetic Material 1 of the embodiment included can be used to increase strength and / or to improve corrosion resistance Elements Nb, Ti, Al, Cu, Be, Mo, V, Zr, Si, Cr, Mn advantageously add to the iron alloy without whose properties-reversible structural transformations different temperatures with volume change significantly to be influenced.
  • stationary heat treatment can be subjected to heating as well Continuous annealing or by passing electrical Make electricity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Electromagnetism (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Magnetic Treatment Devices (AREA)
EP93100179A 1992-01-28 1993-01-08 Verfahren zur Herstellung eines magnetischen Impulsgebers Expired - Lifetime EP0557689B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4202240A DE4202240A1 (de) 1992-01-28 1992-01-28 Verfahren zur herstellung eines magnetischen impulsgebers
DE4202240 1992-01-28

Publications (3)

Publication Number Publication Date
EP0557689A2 EP0557689A2 (de) 1993-09-01
EP0557689A3 EP0557689A3 (fi) 1994-12-14
EP0557689B1 true EP0557689B1 (de) 1998-04-08

Family

ID=6450389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100179A Expired - Lifetime EP0557689B1 (de) 1992-01-28 1993-01-08 Verfahren zur Herstellung eines magnetischen Impulsgebers

Country Status (9)

Country Link
US (1) US6120617A (fi)
EP (1) EP0557689B1 (fi)
JP (1) JP2528801B2 (fi)
AT (1) ATE164964T1 (fi)
CA (1) CA2088207A1 (fi)
DE (2) DE4202240A1 (fi)
ES (1) ES2114960T3 (fi)
FI (1) FI930149A (fi)
NO (1) NO930273L (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09180936A (ja) 1995-12-27 1997-07-11 Unitika Ltd 磁気素子
US6556139B2 (en) * 2000-11-14 2003-04-29 Advanced Coding Systems Ltd. System for authentication of products and a magnetic tag utilized therein
DE102016123210A1 (de) 2016-12-01 2018-06-07 Centitech Gmbh Spannungsgenerator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933337A1 (de) * 1979-08-17 1981-03-26 Robert Bosch Gmbh, 70469 Stuttgart Geber zur erzeugung von elektrischen impulsen durch spruenge in der magnetischen polarisation sowie verfahren zur herstellung desselben
JPS5644746A (en) * 1979-09-20 1981-04-24 Tdk Corp Amorphous magnetic alloy material for magnetic core for accelerating or controlling charged particle and its manufacture
DE3119898A1 (de) * 1981-05-19 1982-12-16 Beru-Werk Albert Ruprecht Gmbh & Co Kg, 7140 Ludwigsburg Metallkern fuer induktionsspulen, verfahren zu dessen herstellung und dessen verwendung
DE3152008C1 (de) * 1981-12-31 1983-07-07 Fried. Krupp Gmbh, 4300 Essen Langgestreckter magnetischer Schaltkern
DE3411079A1 (de) * 1984-03-26 1985-09-26 Vacuumschmelze Gmbh, 6450 Hanau Spulenkern fuer eine induktive, frequenzunabhaengige schaltvorrichtung
US4660025A (en) * 1984-11-26 1987-04-21 Sensormatic Electronics Corporation Article surveillance magnetic marker having an hysteresis loop with large Barkhausen discontinuities
DE3824075A1 (de) * 1988-07-15 1990-01-18 Vacuumschmelze Gmbh Verbundkoerper zur erzeugung von spannungsimpulsen

Also Published As

Publication number Publication date
NO930273L (no) 1993-07-29
FI930149A (fi) 1993-07-29
US6120617A (en) 2000-09-19
CA2088207A1 (en) 1993-07-29
ATE164964T1 (de) 1998-04-15
ES2114960T3 (es) 1998-06-16
FI930149A0 (fi) 1993-01-14
NO930273D0 (no) 1993-01-27
JPH0684630A (ja) 1994-03-25
EP0557689A2 (de) 1993-09-01
JP2528801B2 (ja) 1996-08-28
DE59308365D1 (de) 1998-05-14
EP0557689A3 (fi) 1994-12-14
DE4202240A1 (de) 1993-07-29

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