EP0929883B1 - Element d'affichage utilise dans un systeme antivol magnetique - Google Patents

Element d'affichage utilise dans un systeme antivol magnetique Download PDF

Info

Publication number
EP0929883B1
EP0929883B1 EP98944989A EP98944989A EP0929883B1 EP 0929883 B1 EP0929883 B1 EP 0929883B1 EP 98944989 A EP98944989 A EP 98944989A EP 98944989 A EP98944989 A EP 98944989A EP 0929883 B1 EP0929883 B1 EP 0929883B1
Authority
EP
European Patent Office
Prior art keywords
weight
alloy
strip
approximately
hard magnetic
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
EP98944989A
Other languages
German (de)
English (en)
Other versions
EP0929883A1 (fr
Inventor
Hartwin Weber
Gernot Hausch
Ottmar Roth
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 EP0929883A1 publication Critical patent/EP0929883A1/fr
Application granted granted Critical
Publication of EP0929883B1 publication Critical patent/EP0929883B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2445—Tag integrated into item to be protected, e.g. source tagging
    • 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
    • H01F1/032—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 hard-magnetic materials
    • H01F1/04—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 hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • 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
    • H01F1/14708—Fe-Ni based alloys
    • H01F1/14716—Fe-Ni based alloys in the form of sheets
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • 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
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
    • 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
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1266—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest between cold rolling steps
    • 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
    • Y10S428/90—Magnetic feature
    • 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.]
    • Y10T428/12639—Adjacent, identical composition, components
    • 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.]
    • Y10T428/12639—Adjacent, identical composition, components
    • Y10T428/12646—Group VIII or IB metal-base
    • 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.]
    • Y10T428/12639—Adjacent, identical composition, components
    • Y10T428/12646—Group VIII or IB metal-base
    • Y10T428/12653—Fe, containing 0.01-1.7% carbon [i.e., steel]
    • 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
    • Y10T428/12951—Fe-base component
    • Y10T428/12958—Next to Fe-base component
    • 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.]
    • Y10T428/12986—Adjacent functionally defined components

Definitions

  • Such magnetic anti-theft systems and indicators are well known and for example in the EP 0 121 649 B1 or described in detail in WO 90/03652.
  • magnetoelastic systems in which the activation strip for activating the alarm strip serves by magnetization
  • harmonics Systems in which the activation strip according to its Magnetization serves to deactivate the alarm strip.
  • Alloys with semi-hard magnetic properties that are used for the bias strips Co-Fe-V alloys known as VICALLOY, Co-Fe-Ni alloys, known as VACOZET, as well as Fe-Co-Cr alloys.
  • VICALLOY Co-Fe-V alloys
  • VACOZET Co-Fe-Ni alloys
  • Fe-Co-Cr alloys Fe-Co-Cr alloys.
  • These well-known semi-hard magnetic alloys contain high proportions of cobalt, some of them at least 45 wt .-% and are accordingly expensive.
  • these alloys are magnetically final annealed Condition brittle so that they do not have sufficient ductility, to meet the requirements for the display elements for Anti-theft systems adequately.
  • An important requirement is that these activation strips insensitive to bending or deformation have to be.
  • the remanence under bending or tensile load should be as possible be small. As a guideline, a change becomes smaller 20% specified.
  • the object of the present invention is therefore to begin with mentioned display elements with regard to their bias strips to develop further in that the above Requirements are met.
  • this object is achieved in that the Pre-magnetization strips made from a semi-hard magnetic alloy consist of 8 to 25 wt .-% nickel, 1.5 to 4.5 % By weight aluminum, 0.5 to 3% by weight titanium and balance iron is.
  • the alloy can also contain 0 to 5% by weight of cobalt and / or 0 up to 3% by weight of molybdenum or chromium and / or at least one of the elements Zr, Hf, V, Nb, Ta, W, Mn, Si in individual Proportions of less than 0.5% by weight of the alloy and in one Total content of less than 1% by weight of the alloy and / or at least one of the elements C, N, S, P, B, H, O in individual proportions of less than 0.2% by weight of the alloy and in a total proportion of less than 1% by weight of the Alloy included.
  • the alloy is characterized by a coercive force H c of 10 to 24 A / cm and a remanence B r of at least 1.3 T (13,000 gaus).
  • the alloys of the invention are highly ductile and excellent cold workability before starting, so that cross-sectional reductions of more than 90% are also possible are.
  • Magnetic strips can be made from such alloys are produced, in particular by cold rolling, which Have thicknesses of less than 0.05 mm. Also stand out the alloys of the invention by excellent magnetic Properties and characterized by corrosion resistance.
  • a particularly advantageous alloy is a semi-hard magnetic Iron alloy according to the present invention, the 13.0 to 17.0 wt% nickel, 1.8 to 2.8 % By weight of aluminum and 0.5 to 1.5% by weight of titanium. Reducing the aluminum content can in particular the magnetostriction can be set particularly favorably.
  • the bias strips are through Melt the alloy under vacuum and pour into one Cast block made. Then the ingot becomes one Hot rolled strip at temperatures above 800 ° C, then at annealed at a temperature above 800 ° C and then cooled down quickly. After cold working, expediently Cold rolling in accordance with a reduction in cross section 90% is followed by intermediate annealing at approx. 700 ° C. Cold forming then takes place, expediently Cold rolling, corresponding to a reduction in cross section of at least 60%, preferably 75% or higher, instead. As The last step is the cold rolled strip at temperatures tempered from approx. 400 ° C to 600 ° C. After that, the bias strips cut to length.
  • the ratio of the saturation for a given low magnetization field strength of, for example, 40 A / cm to the saturation B f for a magnetic field in the kOe range should be almost 1, which can be seen from FIG. 3.
  • the counter-field stability should be such that the remanence B S still retains at least 80% of its original value after a counter-field demagnetization of a few A / cm.
  • the remanence B r should only keep 20% of the original value.
  • the display elements must be such that they do not change their remanence B r very much in the vicinity of the coils in the detection locks as a result of a field which is elevated there and possibly oriented in the opposite direction.
  • the alloys according to the invention have such a required counter field stability.
  • the alloys of the present invention are typically by casting a melt from the alloy components in a crucible or oven under vacuum or under a protective gas atmosphere.
  • the temperatures are at about 1600 ° C.
  • the casting is typically done in a round mold.
  • the Cast ingots made from the present alloys then become typical through hot working, intermediate annealing, cold working and further intermediate annealing.
  • the intermediate glow takes place for the purpose of homogenization, grain refinement, deformation or the development of desirable mechanical properties, especially high ductility.
  • Heat treatment at preferably temperatures above 800 ° C, rapid cooling and starting.
  • Preferred tempering temperatures are around 400 ° C to 600 ° C and the starting times are typical from one minute to 24 hours.
  • Alloys are especially cold worked a reduction in cross section of at least 60% before Starting possible.
  • Example 2 An alloy with 15.0% by weight of nickel, 3.0% by weight of aluminum, 1.2% by weight of titanium and the rest of iron was processed as in Example 1, but with a final intermediate annealing at 700 ° C, one last cold deformation corresponding to a cross-sectional reduction of 70% and a final annealing at 500 ° C.
  • a coercive force H c equal to 21 A / cm and a remanence B r equal to 1.45 T were measured.
  • Example 2 An alloy with 15.0% by weight of nickel, 3.0% by weight of aluminum, 1.2% by weight of titanium and the rest of iron was produced as in Example 2. Deviating from this, the last intermediate annealing was carried out at 650 ° C, the last cold working corresponding to a cross-sectional reduction of 85% and the tempering treatment at 480 ° C. A coercive force H c equal to 20 A / cm and a remanence B r equal to 1.53 T were measured.
  • Example 2 An alloy with 15.0% by weight of nickel, 3.0% by weight of aluminum, 1.2% by weight of titanium, 2.0% by weight of molybdenum and the rest of iron was produced as in Example 2. After an annealing treatment at 480 ° C, a coercive force H c equal to 20 A / cm and a remanence B r equal to 1.56 T were measured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

L'invention concerne un alliage magnétique mi-dur destiné à des bandes d'activation dans un système antivol magnétique, qui contient 8 à 25 % en poids de Ni, 1,5 à 4,5 % en poids d'Al, 0,5 à 3 % en poids de Ti, le reste étant constitué de fer. Cet alliage se distingue des alliages connus déjà utilisés, par d'excellentes propriétés magnétiques et par une grande résistance à la corrosion. En outre, cet alliage présente une excellente déformabilité à froid avant le revenu.

Claims (3)

  1. Élément d'affichage utilisé dans un système antivol magnétique, comprenant ;
    1. une bande alarme allongée, composée d'un alliage ferromagnétique amorphe et au moins
    2. une bande de déclenchement, composée d'un alliage magnétique mi-dur
    caractérisé en ce que
    (a) l'alliage magnétique mi-dur comprend
       8 à 25 % en masse de Ni, 0,5 à 3 % en masse de Ti,
       1,5 à 4,5 % en masse de A1, le reste en Fe
    et
    (b) l'alliage peut également contenir :
    0 à 5 % en masse de Co et/ou 0 à 3 % en masse de Mo ou Cr, et/ou
    au moins un des éléments Zr, Hf, V, Nb, Ta, W, Mn, Si, en proportions individuelles de moins de 0,5 % en masse des alliages dans un total de moins de 1 % en masse de l'alliage et/ou,
    au moins un des éléments C, N, S, P, B, H, O, en proportions individuelles de moins de 0,2 % en masse de l'alliage et dans un total de moins de 1 % en masse de l'alliage, et
    (c) l'alliage magnétique mi-dur présente une force coercitive Hc de 10 à 24 A/cm et une rémanence Br d'au moins de 1,3 T (13 000 Gauss).
  2. Élément d'affichage selon la revendication 1,
    caractérisé en ce que
    l'alliage magnétique mi-dur comprend
    13 à 17 % en masse de Ni, 0,5 à 1,5 % en masse de Ti,
    1,8 à 2,8 % en masse de Al, le reste en Fe.
  3. Procédé de fabrication d'une bande de déclenchement selon les revendications 1 ou 2,
    caractérisé par
    les étapes suivantes :
    1. Fusion de l'alliage sous vide ou sous atmosphère modifiée puis coulage en un bloc coulé ;
    2. Déformation à chaud du bloc coulé en une bande sous une température supérieure à 800°C environ ;
    3. Recuit intermédiaire de la bande sous une température supérieure à 800°C environ ;
    4. Refroidissement rapide ;
    5. Déformation à froid par une réduction de section d'environ 90 % ;
    6. Recuit intermédiaire à 700°C environ ;
    7. Déformation à froid par une réduction de section d'au moins 85 % ;
    8. Recuit sous une température de 480°C environ ;
    9. Sectionnement et découpe à la longueur des bandes de déclenchement.
EP98944989A 1997-07-30 1998-07-15 Element d'affichage utilise dans un systeme antivol magnetique Expired - Lifetime EP0929883B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19732872A DE19732872C2 (de) 1997-07-30 1997-07-30 Anzeigeelement für die Verwendung in einem magnetischen Diebstahlsicherungssystem
DE19732872 1997-07-30
PCT/DE1998/001984 WO1999006977A1 (fr) 1997-07-30 1998-07-15 Element d'affichage utilise dans un systeme antivol magnetique

Publications (2)

Publication Number Publication Date
EP0929883A1 EP0929883A1 (fr) 1999-07-21
EP0929883B1 true EP0929883B1 (fr) 2003-09-24

Family

ID=7837405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98944989A Expired - Lifetime EP0929883B1 (fr) 1997-07-30 1998-07-15 Element d'affichage utilise dans un systeme antivol magnetique

Country Status (6)

Country Link
US (2) US6663981B1 (fr)
EP (1) EP0929883B1 (fr)
JP (1) JP3288725B2 (fr)
DE (1) DE19732872C2 (fr)
ES (1) ES2209204T3 (fr)
WO (1) WO1999006977A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6803118B2 (en) * 1997-07-30 2004-10-12 Vacuumschmelze Gmbh Marker for use in a magnetic anti-theft security system
US6011475A (en) * 1997-11-12 2000-01-04 Vacuumschmelze Gmbh Method of annealing amorphous ribbons and marker for electronic article surveillance
DE19836462A1 (de) * 1998-08-12 2000-02-17 Meto International Gmbh Sicherungselement für die elektronische Artikelsicherung
CN100447911C (zh) * 2006-06-16 2008-12-31 李霖 软磁材料偏置片的制造方法及使用该偏置片的防盗声磁标签
DE102006047022B4 (de) 2006-10-02 2009-04-02 Vacuumschmelze Gmbh & Co. Kg Anzeigeelement für ein magnetisches Diebstahlsicherungssystem sowie Verfahren zu dessen Herstellung
US7432815B2 (en) 2006-10-05 2008-10-07 Vacuumschmelze Gmbh & Co. Kg Marker for a magnetic theft protection system and method for its production
KR101001873B1 (ko) * 2008-08-06 2010-12-17 한국에너지기술연구원 게르마늄 산화물을 이용한 열화학적 물분해 수소 제조방법
WO2010016641A1 (fr) * 2008-08-06 2010-02-11 Korea Institute Of Energy Research Procédé de fabrication d'hydrogène à partir d'eau par des cycles thermochimiques à l'aide d'oxyde de germanium
DE102009043539A1 (de) 2009-09-30 2011-04-21 Vacuumschmelze Gmbh & Co. Kg Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens
DE102009043462A1 (de) * 2009-09-30 2011-03-31 Vacuumschmelze Gmbh & Co. Kg Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens
CN102298815B (zh) 2011-05-20 2014-03-12 宁波讯强电子科技有限公司 一种高矫顽力偏置片、其制造方法及用其制成的声磁防盗标签
JP5187464B1 (ja) 2011-08-19 2013-04-24 日立金属株式会社 半硬質磁性材料及びそれを用いてなる盗難防止用磁気センサ並びに半硬質磁性材料の製造方法
US8952114B2 (en) * 2012-08-03 2015-02-10 Exxonmobil Chemical Patents Inc. Halogenated catalysts comprising Salan ligands
US10214368B2 (en) 2015-10-23 2019-02-26 NJM Packaging Inc. System using magnetic coupling to move a carriage
DE102016222781A1 (de) 2016-11-18 2018-05-24 Vacuumschmelze Gmbh & Co. Kg Halbhartmagnetische Legierung für einen Aktivierungsstreifen, Anzeigeelement und Verfahren zum Herstellen einer halbhartmagnetischen Legierung
EP3891619B1 (fr) 2019-02-28 2023-09-27 Hewlett-Packard Development Company, L.P. Accès à des paramètres de micrologiciels avec une cryptographie asymétrique

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US594885A (en) * 1897-12-07 Steam-trap
US592068A (en) * 1897-10-19 Wrench
US543506A (en) * 1895-07-30 Door lock and latch
US4484184A (en) * 1979-04-23 1984-11-20 Allied Corporation Amorphous antipilferage marker
US4553136A (en) * 1983-02-04 1985-11-12 Allied Corporation Amorphous antipilferage marker
DE3545547A1 (de) * 1985-12-21 1987-07-02 B & S Metalpraecis Gmbh Kugelhahn als absperr- und regelarmatur fuer gasfoermige und fluessige stoffstroeme, insbesondere mit abrasiven feststoffbeimischungen
DE3545647A1 (de) 1985-12-21 1987-06-25 Vacuumschmelze Gmbh Deaktivierbares sicherungsetikett fuer diebstahlsicherungssysteme
US4864618A (en) * 1986-11-26 1989-09-05 Wright Technologies, L.P. Automated transaction system with modular printhead having print authentication feature
JP2713711B2 (ja) 1987-11-17 1998-02-16 日立金属株式会社 防犯センサ用マーカ
JPH04500985A (ja) * 1988-09-26 1992-02-20 アライド―シグナル・インコーポレーテッド 機械的共鳴ターゲット監視系用の金属ガラス合金
US5216229A (en) * 1989-06-05 1993-06-01 Rand Mcnally & Company Verifiable object having incremental key
US5550932A (en) * 1992-06-19 1996-08-27 Pierce Companies, Inc. Method for encoding MICR documents
US5371798A (en) * 1993-02-22 1994-12-06 Mcwhortor; William F. System and method for enhancing detection of counterfeit financial transaction documents
US5668897A (en) * 1994-03-15 1997-09-16 Stolfo; Salvatore J. Method and apparatus for imaging, image processing and data compression merge/purge techniques for document image databases
GB2288476A (en) * 1994-04-05 1995-10-18 Ibm Authentication of printed documents.
US5673320A (en) * 1995-02-23 1997-09-30 Eastman Kodak Company Method and apparatus for image-based validations of printed documents
JP3540511B2 (ja) * 1996-06-18 2004-07-07 株式会社東芝 電子署名検証装置
US5801365A (en) * 1996-07-08 1998-09-01 Katz; Richard B. Fund raising by discounted collection on special issue checks
US6021491A (en) * 1996-11-27 2000-02-01 Sun Microsystems, Inc. Digital signatures for data streams and data archives
WO1998026434A1 (fr) * 1996-12-13 1998-06-18 Vacuumschmelze Gmbh Element indicateur a utiliser dans un systeme antivol magnetique
US6111953A (en) * 1997-05-21 2000-08-29 Walker Digital, Llc Method and apparatus for authenticating a document
DE19740908C1 (de) * 1997-09-17 1999-08-05 Vacuumschmelze Gmbh Anzeigeelement für die Verwendung in einem magnetischen Diebstahlsicherungssystem und Verfahren zur Herstellung eines Aktivierungsstreifens hierfür
US6073121A (en) * 1997-09-29 2000-06-06 Ramzy; Emil Y. Check fraud prevention system

Also Published As

Publication number Publication date
DE19732872C2 (de) 2002-04-18
EP0929883A1 (fr) 1999-07-21
DE19732872A1 (de) 1999-02-04
JP2001502759A (ja) 2001-02-27
ES2209204T3 (es) 2004-06-16
US20030129445A1 (en) 2003-07-10
US6689490B2 (en) 2004-02-10
WO1999006977A1 (fr) 1999-02-11
US6663981B1 (en) 2003-12-16
JP3288725B2 (ja) 2002-06-04

Similar Documents

Publication Publication Date Title
EP0929883B1 (fr) Element d'affichage utilise dans un systeme antivol magnetique
DE3855778T4 (de) Diebstahlsicherungssensormarkierung
EP1208244B1 (fr) Materiau metallique a base de nickel et son procede de production
DE69706083T2 (de) Eisen-Nickel-Legierung und kaltgewalztes Band mit kubischer Textur
EP0944910B1 (fr) Element indicateur a utiliser dans un systeme antivol magnetique
DE10320350B3 (de) Hochfeste weichmagnetische Eisen-Kobalt-Vanadium-Legierung
DE19740908C1 (de) Anzeigeelement für die Verwendung in einem magnetischen Diebstahlsicherungssystem und Verfahren zur Herstellung eines Aktivierungsstreifens hierfür
DE2307464A1 (de) Eisenlegierungen und verfahren zu deren herstellung
DE3014699A1 (en) Magnetically anisotropic alloys by deformation processing
DE69725497T2 (de) Verfahren zum Herstellen von magnetischen Bändern
DE3841748C2 (fr)
DE2928059C2 (fr)
DE69703090T2 (de) Verfahren zum herstellen eines magnetischen gegenständes aus einer ferromagnetischer duplexlegierung
US6803118B2 (en) Marker for use in a magnetic anti-theft security system
DE102006047022B4 (de) Anzeigeelement für ein magnetisches Diebstahlsicherungssystem sowie Verfahren zu dessen Herstellung
DE4009010A1 (de) Deaktivierbares sicherungsetikett
WO2018091541A1 (fr) Alliage magnétique demi-dur pour une bande d'activation, élément d'affichage et procédé de fabrication d'un alliage magnétique demi-dur
DE60021693T2 (de) Heiss gewalztes elektroblech mit hervorragenden magnetischen- und korrosionseigenschaften und verfahren zu dessen herstellung
DE102009043539A9 (de) Magnetischer Streifen, Sensor aufweisend einen magnetischen Streifen und Verfahren zur Herstellung eines magnetischen Streifens
DE2225020A1 (de) Alterungs-haertbare magnetische nickeleisen-legierung
EP0634759A2 (fr) Alliage à base de fer semi-dur et déformable pour aimant permanent
EP0557689A2 (fr) Procédé pour la fabrication d'un générateur de pulsations magnétique
DE2513921C2 (de) Halbharte Magnetlegierung und deren Herstellung
DE102006047021B4 (de) Anzeigeelement für ein magnetisches Diebstahlsicherungssystem sowie Verfahren zu dessen Herstellung
DE2746785A1 (de) Kaltverformbare magnetische legierung, deren herstellung und verwendung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): ES FR GB IE IT SE

17P Request for examination filed

Effective date: 19990319

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): ES FR GB IE IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2209204

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040625

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20120720

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20130722

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20130729

Year of fee payment: 16

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140715

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20150827

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140716

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20160726

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20170728

Year of fee payment: 20

Ref country code: FR

Payment date: 20170727

Year of fee payment: 20

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170716

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20180714

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20180714