GB1189696A - Improvements in or relating to Methods of Improving the Magnetic Properties of Steels for Magnetic Applications, and Products thus Obtained - Google Patents

Improvements in or relating to Methods of Improving the Magnetic Properties of Steels for Magnetic Applications, and Products thus Obtained

Info

Publication number
GB1189696A
GB1189696A GB3247067A GB3247067A GB1189696A GB 1189696 A GB1189696 A GB 1189696A GB 3247067 A GB3247067 A GB 3247067A GB 3247067 A GB3247067 A GB 3247067A GB 1189696 A GB1189696 A GB 1189696A
Authority
GB
United Kingdom
Prior art keywords
steel
diffusion
magnetic field
treatment
hours
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
GB3247067A
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.)
Compagnie des Ateliers et Forges de la Loire SA
Original Assignee
Compagnie des Ateliers et Forges de la Loire SA
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
Priority claimed from FR72564A external-priority patent/FR1525034A/en
Priority claimed from FR110897A external-priority patent/FR92623E/en
Application filed by Compagnie des Ateliers et Forges de la Loire SA filed Critical Compagnie des Ateliers et Forges de la Loire SA
Publication of GB1189696A publication Critical patent/GB1189696A/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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/16—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 soft-magnetic materials metals or alloys in the form of sheets
    • H01F1/18—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 soft-magnetic materials metals or alloys in the form of sheets with insulating coating
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon

Abstract

1,189,696. Making alloys; heat-treatment. COMPAGNIE DES ATELIERS ET FORGES DE LA LOIRE. July 14, 1967 [Aug. 9, 1966; June 19, 1967], No.32470/67. Headings C7A and C7D. Steel, particularly in the form of sheet, is coated with a thin layer of at least one element which increases resistivity, particularly Al, Si, Ge or Co, and this element is diffused into the steel while preserving the initial texture of the latter, the product then being treated at a temperature decreasing from 600‹ to 300‹ C. in a magnetic field the direction of which is parallel to the preferential direction of easy magnetization of the material. The coating element, which preferably forms up to 3% by weight of the steel, may be deposited by any known process such as vacuum deposition or decomposition of a volatile compound, while as exemplified diffusion is then effected by annealing in hydrogen at 900‹ C. for 3 hours. Alternatively coating and diffusion may be effected simultaneously by heating the steel for an appropriate time in a reducing atmosphere containing the element to be introduced e.g. for not more than 100 hours at 750‹ to 1050‹ C. The magnetic field treatment may be carried out either during cooling after diffusion, or as a separate step, in which case it may follow an intermediate heat-treatment of 1 to 3 minutes at 800‹ C. in a continuous furnace. The cooling rate in the magnetic field should be 5‹ to 300‹ C. per minute.
GB3247067A 1966-08-09 1967-07-14 Improvements in or relating to Methods of Improving the Magnetic Properties of Steels for Magnetic Applications, and Products thus Obtained Expired GB1189696A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR72564A FR1525034A (en) 1966-08-09 1966-08-09 Improvements to processes for improving the magnetic properties of steels for magnetic uses, and products obtained by these processes
FR110897A FR92623E (en) 1967-06-19 1967-06-19 Improvements to processes for improving the magnetic properties of steels for magnetic uses, and products obtained by these processes

Publications (1)

Publication Number Publication Date
GB1189696A true GB1189696A (en) 1970-04-29

Family

ID=26172482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3247067A Expired GB1189696A (en) 1966-08-09 1967-07-14 Improvements in or relating to Methods of Improving the Magnetic Properties of Steels for Magnetic Applications, and Products thus Obtained

Country Status (6)

Country Link
JP (1) JPS4623816B1 (en)
BE (1) BE701460A (en)
DE (1) DE1583349C2 (en)
GB (1) GB1189696A (en)
SE (1) SE339373B (en)
SU (1) SU393834A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491252A1 (en) * 1980-10-01 1982-04-02 Krupp Gmbh Soft magnetic nickel, iron alloy core - having high satn. induction, low remanence and low coercivity

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2177508A1 (en) * 1972-03-28 1973-11-09 Lignes Telegraph Telephon Integrated microwave circuit substrate - by heating polycrystalline magnetic starting material and mechanically working
DE102005059308A1 (en) * 2005-12-09 2007-06-14 Thyssenkrupp Steel Ag Process for heat treating a steel strip
JP5131747B2 (en) * 2007-11-21 2013-01-30 新日鐵住金株式会社 Manufacturing method of bi-directional electrical steel sheet
JP5427596B2 (en) * 2009-12-25 2014-02-26 株式会社神戸製鋼所 Soft magnetic steel parts having excellent AC magnetic characteristics and manufacturing method thereof
RU2494153C1 (en) * 2012-07-04 2013-09-27 Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт физики металлов Уральского отделения Российской академии наук (ИФМ УрО РАН) Method of magnetothermal processing of anisotropic magnetically soft materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491252A1 (en) * 1980-10-01 1982-04-02 Krupp Gmbh Soft magnetic nickel, iron alloy core - having high satn. induction, low remanence and low coercivity

Also Published As

Publication number Publication date
DE1583349C2 (en) 1974-04-25
SE339373B (en) 1971-10-04
JPS4623816B1 (en) 1971-07-08
DE1583349B1 (en) 1973-09-27
DE1583349A1 (en) 1973-08-16
SU393834A3 (en) 1973-08-10
BE701460A (en) 1968-01-02

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PE20 Patent expired after termination of 20 years