GB387663A - Permanent magnets resistant to changes of temperature - Google Patents

Permanent magnets resistant to changes of temperature

Info

Publication number
GB387663A
GB387663A GB13451/31A GB1345131A GB387663A GB 387663 A GB387663 A GB 387663A GB 13451/31 A GB13451/31 A GB 13451/31A GB 1345131 A GB1345131 A GB 1345131A GB 387663 A GB387663 A GB 387663A
Authority
GB
United Kingdom
Prior art keywords
permanent magnets
changes
temperature
resistant
annealed
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
GB13451/31A
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.)
Vereinigte Stahlwerke AG
Original Assignee
Vereinigte Stahlwerke AG
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 Vereinigte Stahlwerke AG filed Critical Vereinigte Stahlwerke AG
Publication of GB387663A publication Critical patent/GB387663A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

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

Abstract

Permanent magnets resistant to temperature changes are made from improvable ferromagnetic alloys more especially one containing 15 per cent of tungsten and 30 per cent of cobalt. The alloys are first quenched in order to attain their optimum magnetic properties and then annealed at elevated temperatures, up to about 700 DEG C. In an example, an alloy of the composition referred to above, is quenched from 1200 DEG C. and then annealed for an hour at 700 DEG C.
GB13451/31A 1930-05-23 1931-05-06 Permanent magnets resistant to changes of temperature Expired GB387663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE387663X 1930-05-23

Publications (1)

Publication Number Publication Date
GB387663A true GB387663A (en) 1933-02-09

Family

ID=6371175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13451/31A Expired GB387663A (en) 1930-05-23 1931-05-06 Permanent magnets resistant to changes of temperature

Country Status (1)

Country Link
GB (1) GB387663A (en)

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