EP0838289B1 - Verfahren zur Herstellung massiver Magnetkörper - Google Patents

Verfahren zur Herstellung massiver Magnetkörper Download PDF

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Publication number
EP0838289B1
EP0838289B1 EP97117634A EP97117634A EP0838289B1 EP 0838289 B1 EP0838289 B1 EP 0838289B1 EP 97117634 A EP97117634 A EP 97117634A EP 97117634 A EP97117634 A EP 97117634A EP 0838289 B1 EP0838289 B1 EP 0838289B1
Authority
EP
European Patent Office
Prior art keywords
die
alloy
magnet bodies
hydrogen
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
EP97117634A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0838289A1 (de
Inventor
Stefan Dr. 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.)
Institut fuer Festkoerper und Werkstofforschung Dresden eV
Original Assignee
Institut fuer Festkoerper und Werkstofforschung Dresden eV
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 Institut fuer Festkoerper und Werkstofforschung Dresden eV filed Critical Institut fuer Festkoerper und Werkstofforschung Dresden eV
Publication of EP0838289A1 publication Critical patent/EP0838289A1/de
Application granted granted Critical
Publication of EP0838289B1 publication Critical patent/EP0838289B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a method for producing massive Magnetic body made of materials with soft magnetic Properties using the die casting process.
  • the method is applicable for the production of soft magnetic Magnetic bodies for relays, transformers, solenoid valves, actuators and other electromagnetic products.
  • the invention is based on the object of a method create with the massive magnetic body made of materials soft magnetic properties using the Die casting process can be produced efficiently.
  • the process is characterized in that An alloy is used as the starting material Alloy components of the soft magnetic material and additionally one or more of the melting point depressants Elements consist of boron, carbon and phosphorus.
  • the added additional elements in such an amount that the Melting point of the soft magnetic material to a Temperature ⁇ 1400 ° C, preferably ⁇ 1300 ° C is lowered.
  • the die-cast from this alloy Magnetic bodies are then retrofitted using a Heat treatment in a reactive atmosphere the additional Elements at least partially removed.
  • the die-cast magnetic body can be used for the heat treatment
  • Hydrogen can be used as a reactive atmosphere. It is it is advantageous if the hydrogen atmosphere during the Heat treatment of the die-cast magnetic body continuously or is discontinuously renewed by rinsing.
  • the die-cast magnetic body initially in damp hydrogen a temperature between 850 and 1000 ° C and then in dry hydrogen at a temperature between 1000 and 1250 ° C heat treated.
  • the die-cast magnetic body at a temperature in the range of 870 to 950 ° C for a period of 2 to 16 hours in moist Hydrogen and finally at a temperature in the range from 1050 to 1120 ° C for a minimum of Heat treated in dry hydrogen for 1.5 hours.
  • the conditions are created to high quality soft magnetic alloys effective in Die casting process to process massive magnetic bodies.
  • At the Casting does not create any disruptive pores in the material. It can reusable molds are used and the The temperature of the casting melt can be lowered to such an extent that the Die casting tools have a sufficiently long service life.
  • the invention is based on exemplary embodiments explained in more detail.
  • Boron is added to a soft magnetic Fe 85 Si 15 alloy, which has a melting point of 1420 ° C., in such an amount that an Fe 77.5 Si 13.5 B 9 alloy is formed, the melting point of which is only 1160 ° C lies.
  • Rings with an outer ring diameter of 20 mm and a material thickness of 2 x 2 mm are cast from this alloy.
  • a measurement of the coercive field strength results in an H C value of> 1200 A / m.
  • These rings are then subjected to heat treatment in moist hydrogen at 1000 ° C. for 8 hours and then to heat treatment in dry hydrogen at 1100 ° C. for 8 hours.
  • the heat treatment reduces the boron content in the rings to ⁇ 0.1% and approximately the original Fe 85 Si 15 alloy with a coercive field strength H C of ⁇ 100 A / m is formed.
  • the rings thus produced can be used as ring cores for transformers be used.
  • the rods thus produced can be used as cores for relays be used.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Magnetic Ceramics (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
EP97117634A 1996-10-22 1997-10-11 Verfahren zur Herstellung massiver Magnetkörper Expired - Lifetime EP0838289B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19643602 1996-10-22
DE19643602A DE19643602A1 (de) 1996-10-22 1996-10-22 Verfahren zur Herstellung massiver Magnetkörper

Publications (2)

Publication Number Publication Date
EP0838289A1 EP0838289A1 (de) 1998-04-29
EP0838289B1 true EP0838289B1 (de) 2002-12-18

Family

ID=7809469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117634A Expired - Lifetime EP0838289B1 (de) 1996-10-22 1997-10-11 Verfahren zur Herstellung massiver Magnetkörper

Country Status (5)

Country Link
US (1) US5932032A (ja)
EP (1) EP0838289B1 (ja)
JP (1) JPH10154625A (ja)
AT (1) ATE229859T1 (ja)
DE (2) DE19643602A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6722887B2 (ja) * 2016-06-08 2020-07-15 パナソニックＩｐマネジメント株式会社 鉄基磁性体の圧粉磁心

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB450841A (en) * 1935-01-21 1936-07-21 Birmingham Electr Furnaces Ltd Methods or processes for the heat-treatment of iron, steel and alloy steels
DE1182276B (de) * 1958-11-12 1964-11-26 Armco Steel Corp Verfahren zur Herstellung von nichtalterndem Siliziumstahlblech
DD108628A1 (ja) * 1973-09-20 1974-09-20
DD126155A1 (ja) * 1976-06-22 1977-06-22
JPS54104427A (en) * 1978-02-06 1979-08-16 Hitachi Metals Ltd Low temperature fusion magnetic alloy

Also Published As

Publication number Publication date
DE19643602A1 (de) 1998-04-23
ATE229859T1 (de) 2003-01-15
JPH10154625A (ja) 1998-06-09
EP0838289A1 (de) 1998-04-29
DE59708998D1 (de) 2003-01-30
US5932032A (en) 1999-08-03

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