GB951749A - Method for obtaining flat and stress-free magnetic strip - Google Patents

Method for obtaining flat and stress-free magnetic strip

Info

Publication number
GB951749A
GB951749A GB47727/62A GB4772762A GB951749A GB 951749 A GB951749 A GB 951749A GB 47727/62 A GB47727/62 A GB 47727/62A GB 4772762 A GB4772762 A GB 4772762A GB 951749 A GB951749 A GB 951749A
Authority
GB
United Kingdom
Prior art keywords
strip
rolls
furnace
pict
coil
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
GB47727/62A
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.)
Armco Inc
Original Assignee
Armco Inc
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 Armco Inc filed Critical Armco Inc
Publication of GB951749A publication Critical patent/GB951749A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • 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
    • C21D8/1238—Flattening; Dressing; Flexing
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving
    • 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

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Tunnel Furnaces (AREA)

Abstract

A process for flattening magnetic metallic strip material that has been coiled comprises unwinding the coil strip and passing it through a heat treating furnace and subjecting it to a stress relieving heat treatment and, as said strip passes through said furnace, introducing a single reverse bend in said strip in opposition to the coil set thereof. Silicon steel strip 2 from a coil 4, which has been box annealed, after passage, if necessary, through a coating tank of, for example, phosphoric acid, enters a furnace 1. Here it passes over preferably driven hearth rolls 3 to be heated and soaked in the first part of the furnace at 1500, DEG F. and cooled for the remainder of its travel through the furnace to be rewound on a reel 5. Reverse bending of the strip is effected by lifting a single roll 6, preferably driven, above the line of the rolls 3. The roll 6 may be lifted progressively by screw means as the diameter of the coil 4 diminishes. In a modification three adjacent rolls are lifted. Alternatively the rolls 3 may be depressed. In another embodiment, Fig. 3, the strip 2 passes over a series of rolls 10 <PICT:0951749/C3/1> <PICT:0951749/C3/2> <PICT:0951749/C3/3> <PICT:0951749/C3/4> arranged to form a U in the furnace 1. Again, the strip 2 may pass from rolls 11, Fig. 4, up on to rolls 12 and 13. In a further embodiment, Fig. 5, a central roll 14 is spaced from adjacent rolls 15a, 16a a distance sufficient for the strip to form two catenaries. The process may be used with strip coated on one side with an insulating film.
GB47727/62A 1961-12-29 1962-12-18 Method for obtaining flat and stress-free magnetic strip Expired GB951749A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US163283A US3161225A (en) 1961-12-29 1961-12-29 Method for obtaining flat and stress-free magnetic strip

Publications (1)

Publication Number Publication Date
GB951749A true GB951749A (en) 1964-03-11

Family

ID=22589306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47727/62A Expired GB951749A (en) 1961-12-29 1962-12-18 Method for obtaining flat and stress-free magnetic strip

Country Status (5)

Country Link
US (1) US3161225A (en)
BE (1) BE625879A (en)
DE (1) DE1275561B (en)
GB (1) GB951749A (en)
SE (1) SE317694B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591589A1 (en) * 1992-10-07 1994-04-13 Sumitomo Metal Industries, Ltd. Metal plate levelling method and apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT260980B (en) * 1964-02-18 1968-04-10 Indugas Ges Fuer Ind Gasverwen Device for heating or heat treatment of pipes
US3421925A (en) * 1965-07-30 1969-01-14 Westinghouse Electric Corp Method for producing improved metallic strip material
US4016740A (en) * 1973-12-27 1977-04-12 Nippon Steel Corporation Method and an apparatus for the manufacture of a steel sheet
JPS5221252A (en) * 1975-08-13 1977-02-17 Nippon Steel Corp Shape straightening method of metal strip or plate
US5096510A (en) * 1989-12-11 1992-03-17 Armco Inc. Thermal flattening semi-processed electrical steel
CN101956057B (en) * 2010-06-13 2012-06-06 浙江佰耐钢带有限公司 Steel band thermal treatment system with waste heat utilization device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE674278C (en) * 1933-12-30 1939-04-13 Bethlehem Steel Corp Process to reduce the tendency to bend errors and warping in sheet metal or strips made of steel
DE879250C (en) * 1945-08-07 1953-06-11 Cie Generale Du Duralumin & Du Furnace and system for the continuous annealing of metal strips
US2868702A (en) * 1952-11-04 1959-01-13 Helen E Brennan Method of forming a dielectric oxide film on a metal strip
US2922460A (en) * 1953-09-30 1960-01-26 E S C O S A Process and apparatus for straightening and feeding wire
US2980561A (en) * 1958-08-01 1961-04-18 Westinghouse Electric Corp Method of producing improved magnetic steel strip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591589A1 (en) * 1992-10-07 1994-04-13 Sumitomo Metal Industries, Ltd. Metal plate levelling method and apparatus

Also Published As

Publication number Publication date
SE317694B (en) 1969-11-24
BE625879A (en)
DE1275561B (en) 1968-08-22
US3161225A (en) 1964-12-15

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