DE59409021D1 - Process for producing grain-oriented electrical steel strips and magnetic cores made from them - Google Patents

Process for producing grain-oriented electrical steel strips and magnetic cores made from them

Info

Publication number
DE59409021D1
DE59409021D1 DE59409021T DE59409021T DE59409021D1 DE 59409021 D1 DE59409021 D1 DE 59409021D1 DE 59409021 T DE59409021 T DE 59409021T DE 59409021 T DE59409021 T DE 59409021T DE 59409021 D1 DE59409021 D1 DE 59409021D1
Authority
DE
Germany
Prior art keywords
cooling
temperature
deformation
producing grain
rotary
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 - Lifetime
Application number
DE59409021T
Other languages
German (de)
Inventor
Siegfried Mager
Jochen Wieting
Rolf Buerger
Horst Kleine
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.)
Leibniz Institut fuer Festkorper und Werkstofforschung Dresden eV
ArcelorMittal Eisenhuettenstadt GmbH
Original Assignee
Institut fuer Festkoerper und Werkstofforschung Dresden eV
Eko Stahl GmbH
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 Institut fuer Festkoerper und Werkstofforschung Dresden eV, Eko Stahl GmbH filed Critical Institut fuer Festkoerper und Werkstofforschung Dresden eV
Application granted granted Critical
Publication of DE59409021D1 publication Critical patent/DE59409021D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • 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
    • C21D8/1227—Warm 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
    • C21D8/1216—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)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The invention relates to a process for producing grain-oriented magnetic steel strip which is readily magnetisable in four directions in the rolling plane and to magnet cores for rotary (rotating) and non-rotary (non-rotating) electrical machines (electric machinery). The process is characterised in that steel slabs having a C content of < 0.10% and an Si content of from 0 to 2% and contents of Al, Mn, S, N, O in the concentrations usual for magnetic steel strip are preheated to about 1250 DEG C, are roughed (cogged, bloomed) in from 5 to 9 passes with small reductions for each individual pass and are finish-rolled in a separate roll line, with an entrance temperature of from 930 DEG C to 1100 DEG C and a finishing temperature of from 800 DEG C to 950 DEG C, with reductions per pass of 35%, and the hot strip thus produced is reeled without forced cooling (controlled cooling, ducted cooling) at a temperature of > 700 DEG C and after cooling, while an amount of deformation (a degree of deformation) of > 86% is maintained, is subjected to cold working (cold forming) which is followed by an interannealing stage under a neutral gas at from 500 DEG C to 750 DEG C for from 0.5 h to 20 h and further cold working at from 2 to 15% and subsequent final annealing at temperatures around 800 DEG C in an at least intermittently decarburising atmosphere. <IMAGE>
DE59409021T 1993-11-01 1994-10-26 Process for producing grain-oriented electrical steel strips and magnetic cores made from them Expired - Lifetime DE59409021D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4337605A DE4337605C2 (en) 1993-11-01 1993-11-01 Method for producing grain-oriented electrical steel and magnetic cores made therefrom

Publications (1)

Publication Number Publication Date
DE59409021D1 true DE59409021D1 (en) 2000-01-27

Family

ID=6501755

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4337605A Expired - Fee Related DE4337605C2 (en) 1993-11-01 1993-11-01 Method for producing grain-oriented electrical steel and magnetic cores made therefrom
DE59409021T Expired - Lifetime DE59409021D1 (en) 1993-11-01 1994-10-26 Process for producing grain-oriented electrical steel strips and magnetic cores made from them

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4337605A Expired - Fee Related DE4337605C2 (en) 1993-11-01 1993-11-01 Method for producing grain-oriented electrical steel and magnetic cores made therefrom

Country Status (3)

Country Link
EP (1) EP0651061B1 (en)
AT (1) ATE187984T1 (en)
DE (2) DE4337605C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19807122C2 (en) * 1998-02-20 2000-03-23 Thyssenkrupp Stahl Ag Process for the production of non-grain oriented electrical sheet
DE10221793C1 (en) 2002-05-15 2003-12-04 Thyssenkrupp Electrical Steel Ebg Gmbh Non-grain oriented electrical steel or sheet and process for its manufacture
DE102006017762B4 (en) * 2006-04-12 2010-07-08 Siemens Ag Process for laminating an electrical steel strip for transformer cores
US7845065B2 (en) * 2007-11-07 2010-12-07 Gm Global Technology Operations, Inc. Method of making a rotating electric machine stator core

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212124B (en) * 1959-12-24 1966-03-10 Vacuumschmelze Ag Process for the production of sheet metal from iron-silicon alloys
DE1256239B (en) * 1961-01-27 1967-12-14 Westinghouse Electric Corp Process for the production of cube texture in iron-silicon sheets
US4427462A (en) * 1981-06-18 1984-01-24 Matsushita Electric Industrial Co., Ltd. Electric apparatus and its magnetic core of (100)[011] silicon-iron sheet made by rapid quenching method
DD299102A7 (en) * 1989-12-06 1992-04-02 ������@����������@��������@��������@��@��������k�� METHOD FOR PRODUCING NONORIENTED ELECTROBLECH
IT1237481B (en) * 1989-12-22 1993-06-07 Sviluppo Materiali Spa PROCEDURE FOR THE PRODUCTION OF SEMI-FINISHED NON-ORIENTED WHEAT MAGNETIC SHEET.
BE1006599A6 (en) * 1993-01-29 1994-10-25 Centre Rech Metallurgique Method of manufacturing a plate hot rolled steel having high magnetic properties.

Also Published As

Publication number Publication date
EP0651061A1 (en) 1995-05-03
DE4337605A1 (en) 1995-05-04
EP0651061B1 (en) 1999-12-22
DE4337605C2 (en) 1996-02-08
ATE187984T1 (en) 2000-01-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: EKO STAHL GMBH, 15890 EISENHUETTENSTADT, DE

Owner name: LEIBNIZ-INSTITUT FUER FESTKOERPER- UND WERKSTOFFFORS

8327 Change in the person/name/address of the patent owner

Owner name: ARCELOR EISENHUETTENSTADT GMBH, 15890 EISENHUETTENSTADT, DE

Owner name: LEIBNIZ-INSTITUT FUER FESTKOERPER- UND WERKSTOFF, DE

8327 Change in the person/name/address of the patent owner

Owner name: ARCELORMITTAL EISENHUETTENSTADT GMBH, 15890 EI, DE

Owner name: LEIBNIZ-INSTITUT FUER FESTKOERPER- UND WERKSTO, DE