GB265642A - Improved method of producing high permeability in magnetic material - Google Patents

Improved method of producing high permeability in magnetic material

Info

Publication number
GB265642A
GB265642A GB1998125A GB1998125A GB265642A GB 265642 A GB265642 A GB 265642A GB 1998125 A GB1998125 A GB 1998125A GB 1998125 A GB1998125 A GB 1998125A GB 265642 A GB265642 A GB 265642A
Authority
GB
United Kingdom
Prior art keywords
cooling
strand
heating
high permeability
locally
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
GB1998125A
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to GB1998125A priority Critical patent/GB265642A/en
Publication of GB265642A publication Critical patent/GB265642A/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
    • 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

Abstract

265,642. Western Electric Co., Ltd., (Bell Telephone Laboratories, Inc.). Aug. 8, 1925. Annealing; hardening. - In a method of developing high permeability in a loading material for conductors, said material containing iron and nickel, the material in strand form is heated to above 800‹ C., cooled quickly from at least 600‹ C., mechanically worked to give it the requisite hardness and then finally heat-treated either before or after its application to the conductor. In one method for the initial heating of the material, the permalloy strand 14 is passed over the contact rollers 15, 16, 17 to which current is supplied from a transformer 18, being kept during the heating in a hydrogen atmosphere in a chamber 20. The wire passes from the roller 17 into a cooling chamber. In another method the strand is locally flash-heated and its rate of cooling controlled to cause a rapid loss of heat below a predetermined temperature such as 500‹ C. The final heat treatment may be accomplished as in Specification 188,688 or after its application to a copper conductor by locally flash-heating to 900-1275‹ C. cooling in air. reheating to approximately 600‹ C. and then cooling at a rate of about 15‹ C. per second.
GB1998125A 1925-08-08 1925-08-08 Improved method of producing high permeability in magnetic material Expired GB265642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1998125A GB265642A (en) 1925-08-08 1925-08-08 Improved method of producing high permeability in magnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1998125A GB265642A (en) 1925-08-08 1925-08-08 Improved method of producing high permeability in magnetic material

Publications (1)

Publication Number Publication Date
GB265642A true GB265642A (en) 1927-02-08

Family

ID=10138342

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1998125A Expired GB265642A (en) 1925-08-08 1925-08-08 Improved method of producing high permeability in magnetic material

Country Status (1)

Country Link
GB (1) GB265642A (en)

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