FR2438092A1 - Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss - Google Patents

Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss

Info

Publication number
FR2438092A1
FR2438092A1 FR7828527A FR7828527A FR2438092A1 FR 2438092 A1 FR2438092 A1 FR 2438092A1 FR 7828527 A FR7828527 A FR 7828527A FR 7828527 A FR7828527 A FR 7828527A FR 2438092 A1 FR2438092 A1 FR 2438092A1
Authority
FR
France
Prior art keywords
steel
anneal
esp
degrees
steel strip
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.)
Granted
Application number
FR7828527A
Other languages
French (fr)
Other versions
FR2438092B1 (en
Inventor
Dale Martin Kohler
Norris Alfred Dahlstrom
David William Taylor
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
Priority to DE19782841961 priority Critical patent/DE2841961A1/en
Application filed by Armco Inc filed Critical Armco Inc
Priority to FR7828527A priority patent/FR2438092A1/en
Publication of FR2438092A1 publication Critical patent/FR2438092A1/en
Application granted granted Critical
Publication of FR2438092B1 publication Critical patent/FR2438092B1/fr
Granted 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

The steel has cube-on-edge orientation and consists of (a) steel with permeability (mu) above 1850 at 796 A/m; or (b) steel with mu below 1850 at 796 A/m. The steel is subjected to the steps: (1) hot rolled to strip; (2) annealed; (3) pickled; (4) cold rolled to final strip thickness; (5) decarburised; (6) continuously annealing at high temp. in N2,H2,N2-H2, inert gases or a decarburising atmos. to increase mu and reduce iron losses: and (7) annealed in a closed pot. To make steel (a), anneal (6) is at 950-1175 degrees C., esp. 1050-1100 degrees C for 1/4-5 mins., esp. 1/2 - 1 min., and to make steel (b), anneal (6) is at 925-1100 degrees C., esp. 925-1070 degrees C, for 1/4 - 10, esp. 1/2 - 5 mins. The times are inversely proportional to the temps. Used for mfg. steel for transformer cores, etc. to obtain higher mu and lower electrical losses.
FR7828527A 1978-10-05 1978-10-05 Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss Granted FR2438092A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19782841961 DE2841961A1 (en) 1978-10-05 1978-09-27 METHOD FOR PRODUCING GRAIN-ORIENTED SILICON STEEL
FR7828527A FR2438092A1 (en) 1978-10-05 1978-10-05 Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7828527A FR2438092A1 (en) 1978-10-05 1978-10-05 Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss

Publications (2)

Publication Number Publication Date
FR2438092A1 true FR2438092A1 (en) 1980-04-30
FR2438092B1 FR2438092B1 (en) 1981-04-10

Family

ID=9213395

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7828527A Granted FR2438092A1 (en) 1978-10-05 1978-10-05 Grain oriented silicon electrical steel strip - given extra anneal which increases permeability and reduces electrical loss

Country Status (2)

Country Link
DE (1) DE2841961A1 (en)
FR (1) FR2438092A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202711A (en) * 1978-10-18 1980-05-13 Armco, Incl. Process for producing oriented silicon iron from strand cast slabs
JPS6048886B2 (en) * 1981-08-05 1985-10-30 新日本製鐵株式会社 High magnetic flux density unidirectional electrical steel sheet with excellent iron loss and method for manufacturing the same
JP2599867B2 (en) * 1991-08-20 1997-04-16 川崎製鉄株式会社 Method for manufacturing low iron loss grain-oriented silicon steel sheet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1220410A (en) * 1958-03-18 1960-05-24 Yawata Seitetsu Kabushiki Kais Manufacturing process of cube oriented silicon steel sheet and strip
US3159511A (en) * 1956-11-08 1964-12-01 Yawata Iron & Steel Co Process of producing single-oriented silicon steel
US3162553A (en) * 1961-08-22 1964-12-22 Lysaght Australia Ltd Production of grain oriented electrical steels wherein a preconditioning step is employed prior to decarburizing
FR2285462A1 (en) * 1974-09-23 1976-04-16 British Steel Corp PROCESS FOR PREPARING STEELS FOR ELECTROMAGNETIC APPLICATIONS
FR2355073A1 (en) * 1976-06-17 1978-01-13 Allegheny Ludlum Ind Inc PROCESS FOR THE TREATMENT OF SILICON STEEL AND ORIENTED GRAIN SILICON STEEL

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954521A (en) * 1968-12-23 1976-05-04 Allegheny Ludlum Industries, Inc. Method of producing grain oriented silicon steel
PL202451A1 (en) * 1976-11-26 1978-06-19 Kawasaki Steel Co METHOD OF MAKING NON-ORIENTED SILICONE SHEETS WITH HIGH MAGNETIC INDUCTION AND LOW LOSS IN FERROMAGNETIC

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159511A (en) * 1956-11-08 1964-12-01 Yawata Iron & Steel Co Process of producing single-oriented silicon steel
FR1220410A (en) * 1958-03-18 1960-05-24 Yawata Seitetsu Kabushiki Kais Manufacturing process of cube oriented silicon steel sheet and strip
US3162553A (en) * 1961-08-22 1964-12-22 Lysaght Australia Ltd Production of grain oriented electrical steels wherein a preconditioning step is employed prior to decarburizing
FR2285462A1 (en) * 1974-09-23 1976-04-16 British Steel Corp PROCESS FOR PREPARING STEELS FOR ELECTROMAGNETIC APPLICATIONS
FR2355073A1 (en) * 1976-06-17 1978-01-13 Allegheny Ludlum Ind Inc PROCESS FOR THE TREATMENT OF SILICON STEEL AND ORIENTED GRAIN SILICON STEEL

Also Published As

Publication number Publication date
DE2841961A1 (en) 1980-04-10
DE2841961C2 (en) 1990-01-04
FR2438092B1 (en) 1981-04-10

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