GB933873A - Method of producing grain oriented electrical steel - Google Patents

Method of producing grain oriented electrical steel

Info

Publication number
GB933873A
GB933873A GB21605/60A GB2160560A GB933873A GB 933873 A GB933873 A GB 933873A GB 21605/60 A GB21605/60 A GB 21605/60A GB 2160560 A GB2160560 A GB 2160560A GB 933873 A GB933873 A GB 933873A
Authority
GB
United Kingdom
Prior art keywords
steel
range
maximum
rolling
oriented electrical
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
GB21605/60A
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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 United States Steel Corp filed Critical United States Steel Corp
Publication of GB933873A publication Critical patent/GB933873A/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
    • 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
    • C21D8/1261—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 following hot rolling
    • 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
    • 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
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • 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
    • C21D8/1272—Final recrystallisation annealing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

Grain-oriented electrical steel containing 2.75-3.5% silicon is heat-treated prior to the conventional rolling/annealing process by treating in the range 1450-1750 DEG F., quenching drastically (e.g. at a rate exceeding 75 DEG F./sec.) to retain carbides in solution and then causing carbides to precipitate in lenticular form by holding in the range 600-900 DEG F. The treatments may be carried out by allowing the steel to cool slowly through the appropriate range, e.g. from a finishing temperature of 1750 DEG F. after hot-rolling, rather than at a constant temperature. After the first cold-rolling stage the steel may be annealed at 1600-1725 DEG F., preferably in an inert atmosphere having a maximum dewpoint of 25 DEG F., and the second anneal may be at 1400-1500 DEG F. in an inert or reducing atmosphere preferably containing over 2% of water vapour. The steel is finally box-annealed above 2000 DEG F. in a dry, preferably hydrogen, atmosphere. The steel generally contains 0.05% maximum carbon, and 0.15% maximum manganese, the balance being iron and impurities.
GB21605/60A 1959-07-09 1960-06-20 Method of producing grain oriented electrical steel Expired GB933873A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82588959A 1959-07-09 1959-07-09
US94965A US3151005A (en) 1959-07-09 1961-03-13 Method of producing grain-oriented electrical steel

Publications (1)

Publication Number Publication Date
GB933873A true GB933873A (en) 1963-08-14

Family

ID=43618623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21605/60A Expired GB933873A (en) 1959-07-09 1960-06-20 Method of producing grain oriented electrical steel

Country Status (4)

Country Link
US (1) US3151005A (en)
DE (1) DE1264476B (en)
FR (1) FR1261810A (en)
GB (1) GB933873A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089195A1 (en) * 1982-03-15 1983-09-21 Kawasaki Steel Corporation Method of producing grain-oriented silicon steel sheets having excellent magnetic properties

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287184A (en) * 1963-10-22 1966-11-22 Bethlehem Steel Corp Method of producing low carbon electrical sheet steel
US3636579A (en) * 1968-04-24 1972-01-25 Nippon Steel Corp Process for heat-treating electromagnetic steel sheets having a high magnetic induction
FR2007129A1 (en) * 1968-04-27 1970-01-02 Yawata Iron & Steel Co
US3954521A (en) * 1968-12-23 1976-05-04 Allegheny Ludlum Industries, Inc. Method of producing grain oriented silicon steel
JPS4894618A (en) * 1972-03-15 1973-12-05
US3855020A (en) * 1973-05-07 1974-12-17 Allegheny Ludlum Ind Inc Processing for high permeability silicon steel comprising copper
US3855019A (en) * 1973-05-07 1974-12-17 Allegheny Ludlum Ind Inc Processing for high permeability silicon steel comprising copper
YU36756B (en) * 1973-07-23 1984-08-31 Centro Speriment Metallurg Method of manufacturing unidirectional plates of silicon steel with a high magnetic induction
US4200477A (en) * 1978-03-16 1980-04-29 Allegheny Ludlum Industries, Inc. Processing for electromagnetic silicon steel
DE3382043D1 (en) * 1982-08-18 1991-01-17 Kawasaki Steel Co METHOD FOR PRODUCING CORNORIENTED SHEETS OR TAPES FROM SILICON STEEL WITH HIGH MAGNETIC INDUCTION AND LOW IRON LOSS.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140374A (en) * 1936-05-29 1938-12-13 Westinghouse Electric & Mfg Co Process of heat treating magnetic material
US2307391A (en) * 1938-10-14 1943-01-05 American Rolling Mill Co Art of producing magnetic material
DE969732C (en) * 1944-07-20 1958-07-10 Vacuumschmelze Ag Process for the treatment of magnetizable iron-silicon and iron-aluminum alloys
US2765746A (en) * 1950-03-11 1956-10-09 Case Co J I Hydraulic system
DE1009214B (en) * 1954-03-27 1957-05-29 Ver Deutsche Metallwerke Ag Process for creating a distinctive cube texture in magnetizable strips and sheets made of iron alloys containing silicon and / or aluminum
BE563542A (en) * 1956-12-31

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089195A1 (en) * 1982-03-15 1983-09-21 Kawasaki Steel Corporation Method of producing grain-oriented silicon steel sheets having excellent magnetic properties

Also Published As

Publication number Publication date
US3151005A (en) 1964-09-29
FR1261810A (en) 1961-05-19
DE1264476B (en) 1968-03-28

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