US3546031A - Process for treating nickel-iron-molybdenum alloy to increase induction rise and pulse permeability - Google Patents

Process for treating nickel-iron-molybdenum alloy to increase induction rise and pulse permeability Download PDF

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Publication number
US3546031A
US3546031A US676116A US3546031DA US3546031A US 3546031 A US3546031 A US 3546031A US 676116 A US676116 A US 676116A US 3546031D A US3546031D A US 3546031DA US 3546031 A US3546031 A US 3546031A
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Prior art keywords
alloy
iron
permeability
temperature
pulse
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Expired - Lifetime
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US676116A
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English (en)
Inventor
Friedrich Pfeifer
Rudolf Deller
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Vacuumschmelze GmbH and Co KG
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Vacuumschmelze GmbH and Co KG
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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
    • H01F1/14708—Fe-Ni based alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon

Definitions

  • Alloys having a large induction rise and a large pulse permeability are required in electrical applications, as for use in choke coils, employing bias with DC fields, as well as in pulse transformers which operate in a unipolar fashion.
  • the larger the induction rise from the remanence for a transformer material and the greater the pulse permeability the smaller the number of windings required for a given iron cross-section in order to transmit a specified voltage-time area.
  • the desired characteristics are obtained subjecting a known soft magnetic nickel-iron-molybdenum alloy to a high temperature heat treatment between about 200 C. and the Curie point (below about 600 C.) of the said alloy, after which the alloy is subjected to an additional heat treatment or a combined heat treatment and magnetic treatment (magnetic anneal).
  • a magnet core made from the nickel-iron-molybdenum alloy defined above is annealed for several hours in a preliminary treatment for from 4 to 6 hours at a temperature for from 4 to 6 hours at a temperature between 9.50 and 1,220 C., after which the said alloy is heated to a suitable temperature above the Curie point, for example to about 750 C., and then rapidly cooled from this temperature to 200 C. or below, the said cooling being effected, for example, in about 5 minutes. Thereafter the said alloy is subjected to a final anneal of several hours duration, about 3 to 5 hours, for example, in the temperature range 400 to 500 C., and preferably from 450 C. to 500 C.
  • This final heat treatment is particularly beneficial when carried out in a magnetic field the lines of force of which, in the hot alloy, run transverse to the subsequent direction of the magnetic flux.
  • the alloy strip material or the magnet core made from it which has already been subjected to a high temperature anneal at a temperature of from 950 to 1,220 C. in au atmosphere, having a low partial pressure of oxygen, can first be cooled to about 200 C. or to a temperature below 200 C. and thereafter heated to a prescribed temperature above the Curie point, for example, to 750 C. The said alloy is then cooled in a few minutes to about 200 C.
  • the primary object of the invention is a process for manufacturing a soft magnetic alloy material which, over the entire thickness range from 0.1 to 0.003 mm., displays an induction rise from the remanence (Br) which is greater than 3,000 gauss and, more especially, one of ,5,000 to 12,000 gauss and which, in addition, possesses a high pulse permeability.
  • Pr remanence
  • the nickel-iron-molybdenum alloy strip produced in accordance with the invention is suitable for chokes having Nickel Molybdenum Manganese Iron D.C. bias as well as being suitable for chokes and pulseg.
  • the advan- 64160 2:59 0:55 D0: 25 tage to be gained by the use of such alloy strip for uni- 64- 90 2 59 i149 D0- polar pulse transmission lies mainly in the fact that its very large induction rise, in combination with the satis- Tape-wound cores made from the alloys of Table I are factory pulse permeability, serves to transmit apprecably annealed for 5 hours at 1,000 to 1,200 C. in hydrogen, larger voltage-time areas (integrated voltage-time pulses) furnace cooled to about 200 C., and finally reheated to 30 than hitherto, and in a still shorter time.
  • a process for producing a nickel-iron-molybdenum water-cooled container After making room-temperature alloy strip characterized by a large induction rise having measurements of the magnetic characteristics (which apvalues ranging from 5,000 to 12,500 gauss and a large pear in columns 6 and 7 of Table II below), a subsequent 35 pulse permeability value, the alloy containing, by weight, series of treatments is given in the temperature range 400 61% to 67% nickel, 2% to 4% molybdenum and the balto 500 C., both in the absence of an external magnetic ance iron with small amounts of incidental impurities, the field and in the presence of a magnetic field provided by steps comprising, subjecting the alloy strip to a high teman alnico permanent magnet, the said magnetic field being perature anneal at a temperature of from 950 C.
  • the process of claim 1 wherein the final anneal is tioii of 2 and 10 iisec, for tape-wound cores made from carried out in a magnetic field in which the lines of force strip of thickness 0.05, 0.015 and 0.006 mrn. respectively are transverse to the direction which magnetic flux will of alloy C, the said cores having been subjected to a highultimately flow in the alloy strip in use.
  • temperature anneal of 5 hours duration followed by tem- 5.
  • the process of claim 3 wherein the final anneal is pering fOr 4 hOurS at 48()g C. in a transverse magnetic 75 carried out in a magnetic field in which the lines of force are transverse to the direction which magnetic flux will ultimately flow in the alloy strip in use.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
US676116A 1966-10-21 1967-10-18 Process for treating nickel-iron-molybdenum alloy to increase induction rise and pulse permeability Expired - Lifetime US3546031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV0032175 1966-10-21

Publications (1)

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US3546031A true US3546031A (en) 1970-12-08

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US676116A Expired - Lifetime US3546031A (en) 1966-10-21 1967-10-18 Process for treating nickel-iron-molybdenum alloy to increase induction rise and pulse permeability

Country Status (6)

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US (1) US3546031A (de)
CH (1) CH503116A (de)
DE (1) DE1558818C2 (de)
FR (1) FR1551063A (de)
GB (1) GB1160788A (de)
NL (1) NL162143C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657025A (en) * 1968-04-11 1972-04-18 Vacuumschmelze Gmbh Nickel-iron base magnetic material with high initial permeability at low temperatures
US4082580A (en) * 1969-08-12 1978-04-04 Vacuumschmelze Gmbh Iron-nickel-molybdenum alloy having improved stability and high initial permeability
US4290827A (en) * 1978-04-05 1981-09-22 Vacuumschmelze Gmbh Process for producing Ni-Fe magnetic tape cores
US4441940A (en) * 1980-08-19 1984-04-10 Vacuumschmelze Gmbh Method for producing toroidal tape cores for fault current safety switches and use of such cores
DE19634981A1 (de) * 1996-08-29 1998-05-28 Vacuumschmelze Gmbh Verfahren zum Herstellen von Kernblechen für Modemübertrager

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744333A1 (de) * 1977-10-01 1979-04-05 Krupp Gmbh Magnetkern
DE2816173C2 (de) * 1978-04-14 1982-07-29 Vacuumschmelze Gmbh, 6450 Hanau Verfahren zum Herstellen von Bandkernen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1768443A (en) * 1930-06-24 Percent molybdenum
US1841097A (en) * 1928-02-24 1932-01-12 Bell Telephone Labor Inc Heat treatment of conductors
US3024142A (en) * 1958-09-03 1962-03-06 Post Office Magnetic alloys
US3086280A (en) * 1959-06-18 1963-04-23 Western Electric Co Processing of soft magnetic materials

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE846465C (de) * 1946-08-23 1952-08-14 Western Electric Co Verfahren zur Herstellung magnetischer Werkstoffe und Gegenstaende mit hoher Permeabilitaet
US2891883A (en) * 1955-06-14 1959-06-23 Gen Electric Magnetic nickel base material and method of making
GB944293A (en) * 1959-05-13 1963-12-11 Matake Kurokawa A process for the production of ferro-magnetic materials having constancy of permeability by heat treatment in a magnetic field
DE1281151B (de) * 1965-05-29 1968-10-24 Krupp Gmbh Verfahren zur Waermebehandlung von Eisen-Nickel-Legierungen mit Nickelgehalten zwischen 45 und 65%

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1768443A (en) * 1930-06-24 Percent molybdenum
US1841097A (en) * 1928-02-24 1932-01-12 Bell Telephone Labor Inc Heat treatment of conductors
US3024142A (en) * 1958-09-03 1962-03-06 Post Office Magnetic alloys
US3086280A (en) * 1959-06-18 1963-04-23 Western Electric Co Processing of soft magnetic materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657025A (en) * 1968-04-11 1972-04-18 Vacuumschmelze Gmbh Nickel-iron base magnetic material with high initial permeability at low temperatures
US4082580A (en) * 1969-08-12 1978-04-04 Vacuumschmelze Gmbh Iron-nickel-molybdenum alloy having improved stability and high initial permeability
US4290827A (en) * 1978-04-05 1981-09-22 Vacuumschmelze Gmbh Process for producing Ni-Fe magnetic tape cores
US4441940A (en) * 1980-08-19 1984-04-10 Vacuumschmelze Gmbh Method for producing toroidal tape cores for fault current safety switches and use of such cores
DE19634981A1 (de) * 1996-08-29 1998-05-28 Vacuumschmelze Gmbh Verfahren zum Herstellen von Kernblechen für Modemübertrager

Also Published As

Publication number Publication date
DE1558818B2 (de) 1971-05-06
DE1558818C2 (de) 1975-10-23
NL6714152A (de) 1968-04-22
FR1551063A (de) 1968-12-27
NL162143C (nl) 1980-04-15
GB1160788A (en) 1969-08-06
DE1558818A1 (de) 1971-05-06
CH503116A (de) 1971-02-15
NL162143B (nl) 1979-11-15

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