GB286167A - Improvements in metallic cores for electromagnets or the like - Google Patents

Improvements in metallic cores for electromagnets or the like

Info

Publication number
GB286167A
GB286167A GB23252/27A GB2325227A GB286167A GB 286167 A GB286167 A GB 286167A GB 23252/27 A GB23252/27 A GB 23252/27A GB 2325227 A GB2325227 A GB 2325227A GB 286167 A GB286167 A GB 286167A
Authority
GB
United Kingdom
Prior art keywords
powder
electromagnets
ground
atmosphere
cores
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
GB23252/27A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB23252/27A priority Critical patent/GB286167A/en
Publication of GB286167A publication Critical patent/GB286167A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/142—Thermal or thermo-mechanical treatment

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

286,167. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Sept. 5, 1927. Addition to 269,770. Electromagnets.- In making metallic powders for compression into cores for electromagnets, Pupin coils &c. by decomposing the corresponding metal carbonyl, in place of treating the resulting powders in an inert atmosphere, as in the parent. Specification, the powder according to the present invention is heat-treated in a reducing atmosphere. The product is then ground, preferably in a ball mill, to grains of the requisite size, generally in the absence of oxygen, and the resulting powder is used for making the cores. When a slight superficial oxidation of the grains is required, this may be obtained by exposing the ground powder for a short time to an oxidizing atmosphere. In an exemplary process, the powder obtained by decomposing iron carbonyl is treated for eighteen hours in a revolving furnace at 500‹ C. with a current of hydrogen. After cooling in an atmosphere of hydrogen, the product, is ground in a ball mill without access of oxygen and the resulting powder has a permeability more than double that of powder which has not undergone the heat treatment.
GB23252/27A 1927-09-05 1927-09-05 Improvements in metallic cores for electromagnets or the like Expired GB286167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB23252/27A GB286167A (en) 1927-09-05 1927-09-05 Improvements in metallic cores for electromagnets or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23252/27A GB286167A (en) 1927-09-05 1927-09-05 Improvements in metallic cores for electromagnets or the like

Publications (1)

Publication Number Publication Date
GB286167A true GB286167A (en) 1928-03-01

Family

ID=10192634

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23252/27A Expired GB286167A (en) 1927-09-05 1927-09-05 Improvements in metallic cores for electromagnets or the like

Country Status (1)

Country Link
GB (1) GB286167A (en)

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