GB882810A - Magnetic sheet material and process of producing the same - Google Patents

Magnetic sheet material and process of producing the same

Info

Publication number
GB882810A
GB882810A GB1682/60A GB168260A GB882810A GB 882810 A GB882810 A GB 882810A GB 1682/60 A GB1682/60 A GB 1682/60A GB 168260 A GB168260 A GB 168260A GB 882810 A GB882810 A GB 882810A
Authority
GB
United Kingdom
Prior art keywords
volume
acid
hydrogen
annealing
etched
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
GB1682/60A
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB882810A publication Critical patent/GB882810A/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
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Electromagnetism (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

(100) [001] orientation silicon iron is made by cold reducing (110) [001] stock by 60-90%, annealing in a non-carburizing atmosphere at 1100-1425 DEG C. and subjecting the sheet to at least one cyclic treatment comprising etching and again annealing under the same conditions as above. The annealing may be carried in an atmosphere capable of reducing silica, such a vacuum of below 1 micron mercury, or in an atmosphere of hydrogen with a dew point of -50 DEG C., helium, argon, or mixtures of hydrogen and nitrogen. These gases may be at a pressure of 1 mm mercury. Vapours of nickel and chromium may be present when heating elements of nickel chrome alloys are used. The sheets may be etched by gaseous or liquid reagents, and electrolytic etching methods may be employed. Preferably the sheet is etched between rolling and the first anneal. During annealing the stacked or coiled sheet is separated by a calcined inert material such as alumina. The iron silicon sheets may be etched in the following ways:- (1) Two minutes in 80 DEG C. ferric ammonium sulphate acidified with 3% of its volume of concentrated sulphuric acid, followed by a 30 second electro-polish in an electrolyte composed of orthophosphoric acid (85%) with from 1-20% by weight of chromic acid added thereto, and electro-polishing at a current density of 5 to 25 amperes per square inch. (2) A 30 second etch in a ferric ammonium sulphate containing 5% of its volume of sulphuric acid (concentrated) at 80 DEG C. (3) 30 second dip in a solution comprising a mixture of 50% by volume phosphoric acid (85%) and 50% by volume of 30% hydrogen peroxide, at room temperature. (4) 30 second dip in a solution comprising a mixture of 50% by volume of phosphoric acid (85%) 10% by volume nitric acid (65%), 10% by volume hydrogen fluoride (48%) and 30% water at room temperature. (5) An electrolytic etch using hydrochloric acid, phosphoric acid, sulphuric acid, disodium phosphate, or potassium carbonate as electrolyte. (6) One minute of 1100 DEG C. in a gas containing 10% gaseous hydrogen chloride.
GB1682/60A 1959-01-23 1960-01-18 Magnetic sheet material and process of producing the same Expired GB882810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US882810XA 1959-01-23 1959-01-23

Publications (1)

Publication Number Publication Date
GB882810A true GB882810A (en) 1961-11-22

Family

ID=22210459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1682/60A Expired GB882810A (en) 1959-01-23 1960-01-18 Magnetic sheet material and process of producing the same

Country Status (3)

Country Link
BE (1) BE586846A (en)
FR (1) FR1250785A (en)
GB (1) GB882810A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645719A (en) * 1984-06-18 1987-02-24 Fuji Photo Film Co., Ltd. Soft magnetic thin film having uniaxial magnetic anisotropy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834532B2 (en) * 1979-12-07 1983-07-27 新日本製鐵株式会社 Finish annealing method for grain-oriented electrical steel sheets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645719A (en) * 1984-06-18 1987-02-24 Fuji Photo Film Co., Ltd. Soft magnetic thin film having uniaxial magnetic anisotropy

Also Published As

Publication number Publication date
BE586846A (en) 1960-05-16
FR1250785A (en) 1961-01-13

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