GB903586A - Improvements in or relating to permanent magnets - Google Patents

Improvements in or relating to permanent magnets

Info

Publication number
GB903586A
GB903586A GB3392659A GB3392659A GB903586A GB 903586 A GB903586 A GB 903586A GB 3392659 A GB3392659 A GB 3392659A GB 3392659 A GB3392659 A GB 3392659A GB 903586 A GB903586 A GB 903586A
Authority
GB
United Kingdom
Prior art keywords
range
alloy
relating
hours
permanent magnets
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
GB3392659A
Inventor
Frederick William Tetley
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.)
Swift Levick Magnets Ltd
Original Assignee
Swift Levick and Sons Ltd
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 Swift Levick and Sons Ltd filed Critical Swift Levick and Sons Ltd
Priority to GB3392659A priority Critical patent/GB903586A/en
Publication of GB903586A publication Critical patent/GB903586A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

A permanent magnet alloy contains in percentage by weight: .Ni.11.75 - 12.5 .Al.8.0 - 8.5 .Co.22.75 - 23.75 .Cu.2.75 - 3.25 .Nb.0.20 - 0.35 .Si.0.20 - 0.35 .S.0.05 - 0.35 .Fe.balance The alloy is cooled in a magnetic field at a rate of 0.25 DEG C to 1 DEG C. per second from the range 930-950 DEG C. to below 625 DEG C., and is then aged in the range 625-550 DEG C., preferably first in the range 625-580 DEG C. for at least 8 hours, and then in the range 580-550 DEG C. for at least 10 hours, followed by final magnetization. The alloy may be prepared by melting or by powder metallurgy methods; magnetization may be carried out during cooling in the mould or from the sintering temperature, or the magnets may be reheated to 930-950 DEG C. Specifications 634,686, 634,700, 652,022 and 661,727 are referred to.
GB3392659A 1959-10-07 1959-10-07 Improvements in or relating to permanent magnets Expired GB903586A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3392659A GB903586A (en) 1959-10-07 1959-10-07 Improvements in or relating to permanent magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3392659A GB903586A (en) 1959-10-07 1959-10-07 Improvements in or relating to permanent magnets

Publications (1)

Publication Number Publication Date
GB903586A true GB903586A (en) 1962-08-15

Family

ID=10359201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3392659A Expired GB903586A (en) 1959-10-07 1959-10-07 Improvements in or relating to permanent magnets

Country Status (1)

Country Link
GB (1) GB903586A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247028B (en) * 1964-01-23 1967-08-10 Swift Levick & Sons Ltd Permanent magnet alloy
GB2131047A (en) * 1982-11-29 1984-06-13 Kanto Denka Kogyo Kk Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
CN114855056A (en) * 2022-04-11 2022-08-05 杭州永磁集团有限公司 Preparation method of heterojunction sintering alnico doped with cast alnico

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247028B (en) * 1964-01-23 1967-08-10 Swift Levick & Sons Ltd Permanent magnet alloy
GB2131047A (en) * 1982-11-29 1984-06-13 Kanto Denka Kogyo Kk Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
CN114855056A (en) * 2022-04-11 2022-08-05 杭州永磁集团有限公司 Preparation method of heterojunction sintering alnico doped with cast alnico

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