GB346788A - Improvements in magnetic material and in the method of making same - Google Patents

Improvements in magnetic material and in the method of making same

Info

Publication number
GB346788A
GB346788A GB178230A GB178230A GB346788A GB 346788 A GB346788 A GB 346788A GB 178230 A GB178230 A GB 178230A GB 178230 A GB178230 A GB 178230A GB 346788 A GB346788 A GB 346788A
Authority
GB
United Kingdom
Prior art keywords
per cent
magnetic material
carbon
wire
making same
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
GB178230A
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.)
WILLIAM HOGHTON DEARDEN
STC PLC
Original Assignee
WILLIAM HOGHTON DEARDEN
Standard Telephone and Cables PLC
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 WILLIAM HOGHTON DEARDEN, Standard Telephone and Cables PLC filed Critical WILLIAM HOGHTON DEARDEN
Priority to GB178230A priority Critical patent/GB346788A/en
Publication of GB346788A publication Critical patent/GB346788A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • 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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab

Landscapes

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

Abstract

The manufacture of a magnetic material of high initial permeability and low retentivity comprising one or more ferromagnetic elements includes the step of adding carbon in the melt and a subsequent annealing in the presence of a reducing agent to reduce the carbon present in excess of that required to combine with the oxygen in the material. By way of example an alloy containing 45 per cent of nickel, 25 per cent of cobalt and 30 per cent of iron may be melted with 0,1-0,5 per cent of carbon in the free state and the product cast, rolled and passed through a wire-drawing machine. Between passes it is annealed in hydrogen at 900-1250 DEG C. A wire or tape for a continuously-electric signalling conductor may thus be manufactured.
GB178230A 1930-01-17 1930-01-17 Improvements in magnetic material and in the method of making same Expired GB346788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB178230A GB346788A (en) 1930-01-17 1930-01-17 Improvements in magnetic material and in the method of making same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB178230A GB346788A (en) 1930-01-17 1930-01-17 Improvements in magnetic material and in the method of making same

Publications (1)

Publication Number Publication Date
GB346788A true GB346788A (en) 1931-04-17

Family

ID=9727886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB178230A Expired GB346788A (en) 1930-01-17 1930-01-17 Improvements in magnetic material and in the method of making same

Country Status (1)

Country Link
GB (1) GB346788A (en)

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