GB846362A - Improvements in or relating to thin ferro-magnetic sheet of low coercive force and high permeability - Google Patents

Improvements in or relating to thin ferro-magnetic sheet of low coercive force and high permeability

Info

Publication number
GB846362A
GB846362A GB26504/58A GB2650458A GB846362A GB 846362 A GB846362 A GB 846362A GB 26504/58 A GB26504/58 A GB 26504/58A GB 2650458 A GB2650458 A GB 2650458A GB 846362 A GB846362 A GB 846362A
Authority
GB
United Kingdom
Prior art keywords
coercive force
high permeability
thickness
low coercive
cold
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
GB26504/58A
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.)
Cornigliano SpA
Original Assignee
Cornigliano SpA
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 Cornigliano SpA filed Critical Cornigliano SpA
Publication of GB846362A publication Critical patent/GB846362A/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
    • 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
    • C21D8/1266—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 between cold rolling steps

Landscapes

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

Abstract

A method of manufacturing thin ferro-magnetic sheet of low coercive force and high permeability by using a rimmed low carbon steel having the following analysis: C 0.05 to 0.10%; Mn 0.20 to 0.50%; S max 0.035;% max 0.020% and balance iron, is characterized in that after a first hot rolling, a first cold thickness reduction of from 40 to 80% and a first annealing at a temperature from 650 DEG to 750 DEG C., the steel is subjected to a second cold thickness reduction of between 2 and 5% and to a second annealing at a constant temperature between 730 and 780 DEG C. In an embodiment a hot rolled band of rimmed low carbon steel within the above analysis and having a thickness of about 2mm. is pickled and cold rolled to a thickness of about 0.5mm. The band is then annealed at a fixed temperature between 650 and 750 DEG C. and soaked at this temperature for 15 to 20 hours. After annealing the thickness is reduced by 2 to 5% by cold rolling and the band is cut into sheets which are annealed at a constant temperature between 730 and 780 DEG C. e.g. 750 DEG C. for 20 to 25 hours. The sheets have a high permeability and a low coercive force of from 0.70 to 0.80 oersted.
GB26504/58A 1958-05-24 1958-08-18 Improvements in or relating to thin ferro-magnetic sheet of low coercive force and high permeability Expired GB846362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT846362X 1958-05-24

Publications (1)

Publication Number Publication Date
GB846362A true GB846362A (en) 1960-08-31

Family

ID=11325334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26504/58A Expired GB846362A (en) 1958-05-24 1958-08-18 Improvements in or relating to thin ferro-magnetic sheet of low coercive force and high permeability

Country Status (3)

Country Link
DE (1) DE1178877B (en)
FR (1) FR1202647A (en)
GB (1) GB846362A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458599A1 (en) * 2010-11-24 2012-05-30 General Electric Company Magnetic shield for current transformer in electronic watt-hour meter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7163016B2 (en) 2000-01-21 2007-01-16 Henlopen Manufacturing Co., Inc. Material dispenser with applicator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE642032C (en) * 1929-08-29 1937-02-20 I G Farbenindustrie Akt Ges Process for improving magnetic properties
DE742930C (en) * 1940-05-22 1943-12-14 Heraeus Vacuumschmelze Ag Process to achieve a slight increase in the initial permeability with the field strength for pure iron
US2672429A (en) * 1952-06-03 1954-03-16 Stanley Works Electrical steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458599A1 (en) * 2010-11-24 2012-05-30 General Electric Company Magnetic shield for current transformer in electronic watt-hour meter
US8664935B2 (en) 2010-11-24 2014-03-04 General Electric Company Magnetic shield for current transformer in electronic watt-hour meter

Also Published As

Publication number Publication date
DE1178877B (en) 1964-10-01
FR1202647A (en) 1960-01-12

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