GB870214A - Improvements in magnetic material and method of fabrication - Google Patents

Improvements in magnetic material and method of fabrication

Info

Publication number
GB870214A
GB870214A GB19866/59A GB1986659A GB870214A GB 870214 A GB870214 A GB 870214A GB 19866/59 A GB19866/59 A GB 19866/59A GB 1986659 A GB1986659 A GB 1986659A GB 870214 A GB870214 A GB 870214A
Authority
GB
United Kingdom
Prior art keywords
mould
molten metal
poured
ingot
aluminium
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
GB19866/59A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB870214A publication Critical patent/GB870214A/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
    • 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
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • 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
    • C21D2201/00—Treatment for obtaining particular effects
    • C21D2201/04—Single or very large crystals
    • 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
    • C21D2201/00—Treatment for obtaining particular effects
    • C21D2201/05—Grain orientation
    • 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
    • C21D2281/00—Making use of special physico-chemical means
    • C21D2281/01—Seed crystals being used
    • 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
    • C21D2281/00—Making use of special physico-chemical means
    • C21D2281/02—Making use of special physico-chemical means temperature gradient
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—Hot rolling
    • 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

Landscapes

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

Abstract

Molten metal comprising at least 92% of iron is poured into an ingot mould having a temperature gradient such that on solidification a polycrystalline casting having a <PICT:0870214/III/1> plurality of vertically elongated grains is produced. The molten metal may contain aluminium, molybdenum, or silicon. As shown an alloy is cast in a mould 30 constructed of fused Al2O3 and closed at the bottom by a hollow water cooled copper slab 31. In operation, the side walls of the mould are heated by an electrical resistance heater to about 1400 DEG C. and the cooled bottom slab is maintained at about 20 DEG C. Molten metal at about 1700 DEG C. is poured into the mould and an ingot is formed having a plurality of columnar grains 34 which grow vertically from the cooled bottom of the mould. To prevent the upper portion of the molten metal in the mould from cooling too rapidly an exothermic mixture of iron oxide and aluminium is added to react with the molten metal and produce a temperature of about 4000 DEG C. U.S.A. Specification 2,112,084 is referred to.
GB19866/59A 1956-09-20 1957-09-17 Improvements in magnetic material and method of fabrication Expired GB870214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US610904A US2940881A (en) 1956-09-20 1956-09-20 Method for making cbe-on-face magnetic steel

Publications (1)

Publication Number Publication Date
GB870214A true GB870214A (en) 1961-06-14

Family

ID=24446873

Family Applications (4)

Application Number Title Priority Date Filing Date
GB29228/57A Expired GB870209A (en) 1956-09-20 1957-09-17 Improvements in magnetic material and method of fabrication
GB29229/57A Expired GB870210A (en) 1956-09-20 1957-09-17 Improvements in magnetic material
GB29230/57A Expired GB870211A (en) 1956-09-20 1957-09-17 Improvements in fabrication of magnetic material
GB19866/59A Expired GB870214A (en) 1956-09-20 1957-09-17 Improvements in magnetic material and method of fabrication

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB29228/57A Expired GB870209A (en) 1956-09-20 1957-09-17 Improvements in magnetic material and method of fabrication
GB29229/57A Expired GB870210A (en) 1956-09-20 1957-09-17 Improvements in magnetic material
GB29230/57A Expired GB870211A (en) 1956-09-20 1957-09-17 Improvements in fabrication of magnetic material

Country Status (6)

Country Link
US (1) US2940881A (en)
BE (6) BE560976A (en)
FR (4) FR1183118A (en)
GB (4) GB870209A (en)
LU (3) LU35457A1 (en)
NL (3) NL112430C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992952A (en) * 1955-12-01 1961-07-18 Vacuumschmelze Ag Method of manufacturing magnetic sheets
US3164496A (en) * 1956-09-20 1965-01-05 Gen Electric Magnetic material and method of fabrication
US3136666A (en) * 1960-01-27 1964-06-09 Yawata Iron & Steel Co Method for producing secondary recrystallization grain of cube texture
US3105781A (en) * 1960-05-02 1963-10-01 Gen Electric Method for making cube-on-edge texture in high purity silicon-iron
US3345219A (en) * 1960-05-04 1967-10-03 Vacuumschmelze Ag Method for producing magnetic sheets of silicon-iron alloys
US3124491A (en) * 1960-05-23 1964-03-10 Heavy gauge double oriented magnetic sheet material
US3115430A (en) * 1960-09-20 1963-12-24 Armco Steel Corp Production of cube-on-edge oriented silicon iron
US3278348A (en) * 1965-01-28 1966-10-11 Westinghouse Electric Corp Process for producing doubly oriented cube-on-face magnetic sheet material
US3337373A (en) * 1966-08-19 1967-08-22 Westinghouse Electric Corp Doubly oriented cube-on-face magnetic sheet containing chromium
JPS4926415B1 (en) * 1970-09-26 1974-07-09

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112084A (en) * 1934-11-01 1938-03-22 Westinghouse Electric & Mfg Co Magnetic material and method of producing the same
US2307391A (en) * 1938-10-14 1943-01-05 American Rolling Mill Co Art of producing magnetic material
GB610440A (en) * 1945-04-12 1948-10-15 British Thomson Houston Co Ltd Improvements in and relating to the production of preferred crystal orientation in thin gauge silicon steel
US2700006A (en) * 1953-09-03 1955-01-18 Gen Electric Process for producing fine-grained highly oriented silicon steel

Also Published As

Publication number Publication date
NL220953A (en)
BE560974A (en)
FR72332E (en) 1960-03-31
BE560972A (en)
GB870211A (en) 1961-06-14
FR72331E (en) 1960-03-31
LU35457A1 (en)
FR1183118A (en) 1959-07-03
GB870210A (en) 1961-06-14
BE560938A (en)
LU35456A1 (en)
GB870209A (en) 1961-06-14
BE560973A (en)
BE560975A (en)
BE560976A (en)
US2940881A (en) 1960-06-14
NL220951A (en)
NL112430C (en)
FR1183119A (en) 1959-07-03
LU35460A1 (en)

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