GB1209623A - Method of manufacturing a permanent magnetic alloy body - Google Patents

Method of manufacturing a permanent magnetic alloy body

Info

Publication number
GB1209623A
GB1209623A GB48448/67A GB4844867A GB1209623A GB 1209623 A GB1209623 A GB 1209623A GB 48448/67 A GB48448/67 A GB 48448/67A GB 4844867 A GB4844867 A GB 4844867A GB 1209623 A GB1209623 A GB 1209623A
Authority
GB
United Kingdom
Prior art keywords
sulphur
coat
blank
alloy
blanks
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
GB48448/67A
Inventor
Sadaichi Komaki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1209623A publication Critical patent/GB1209623A/en
Expired legal-status Critical Current

Links

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
    • H01F1/032—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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • 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
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B1/00—Single-crystal growth directly from the solid state
    • C30B1/02—Single-crystal growth directly from the solid state by thermal treatment, e.g. strain annealing
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/52—Alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

1,209,623. zone-melting.- S. KOMAKI. 25 Oct., 1967 [25 Oct., 1966], No. 48448/67. Heading B1S. [Also in Division C7] A permanent magnetic alloy. body with columnar crystals having improved magnetic properties in the axial direction equal to those of a single crystal magnet is made by casting a plurality of magnetic alloy blanks 1 comprising 25-40% Co, 10-20% Ni, 6-12% Al, 0-6% Cu, 2-10% Ti, and balance Fe and impurities, applying a coat 3 of sulphur to the surface of each blank preferably in a proportion of 1À5-3À3%, inserting the blanks in a non-magnetisable preferably porous sheath 5, passing the blank-containing sheath at constant speed downwardly, e.g. by a cord 7 through a high-frequency induction coil 6 to progressively heat and melt the blanks to cause recrystallisation, then into a coolant liquid 8, e.g. water to progressively quench portions of the blank spaced at a predetermined distance from the coil to produce unidirectionally oriented crystals. The sulphur coat 3 reacts during melting with an oxide or nitride coat forming a flame 10; sulphur is retained in the alloy. The top blank forms a waste magnet 4, as shown. The sulphur coat may be 0.5-0.7 mm. thick and applied over an oxide coat 0.05-0.1 mm. thick on opposite end surfaces of each blank by inserting the ends in turn into a sulphur melt. Japanese specifications are referred to in which similar large columnar crystals are obtained in a Ti-containing "Alnico" alloy (Ni-Co-Al-Cu- Fe) by adding S, C and/or Se to the alloy and melting together, casting in a mould and quenching by means of a chill plate from one end of the casting (Fig. 6). Columnar crystals may also be rendered larger by heating the blanks above 1,20Q‹C by high-frequency electric current or combustion of gas.
GB48448/67A 1966-10-25 1967-10-25 Method of manufacturing a permanent magnetic alloy body Expired GB1209623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6997066 1966-10-25

Publications (1)

Publication Number Publication Date
GB1209623A true GB1209623A (en) 1970-10-21

Family

ID=13418003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48448/67A Expired GB1209623A (en) 1966-10-25 1967-10-25 Method of manufacturing a permanent magnetic alloy body

Country Status (5)

Country Link
US (1) US3540947A (en)
DE (1) DE1583382A1 (en)
FR (1) FR1562821A (en)
GB (1) GB1209623A (en)
NL (1) NL6714446A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772090A (en) * 1971-07-22 1973-11-13 Gen Electric Alloy microstructure control
DE3669044D1 (en) * 1985-12-19 1990-03-22 Bbc Brown Boveri & Cie METHOD FOR ZONING A METAL WORKPIECE.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578407A (en) * 1948-01-10 1951-12-11 Gen Electric Method of making cast alnico magnets
GB821624A (en) * 1955-01-19 1959-10-14 Philips Electrical Ind Ltd Improvements in or relating to method of making anisotropic permanent magnets
GB1085934A (en) * 1965-09-17 1967-10-04 Swift Levick & Sons Ltd Improvements in or relating to permanent magnets
GB987636A (en) * 1967-04-17 1965-03-31 Swift Levick & Sons Ltd Improvements in or relating to permanent magnets

Also Published As

Publication number Publication date
FR1562821A (en) 1969-04-11
NL6714446A (en) 1968-04-26
US3540947A (en) 1970-11-17
DE1583382A1 (en) 1970-08-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee