EP0947597A3 - Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics - Google Patents

Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics Download PDF

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Publication number
EP0947597A3
EP0947597A3 EP99105071A EP99105071A EP0947597A3 EP 0947597 A3 EP0947597 A3 EP 0947597A3 EP 99105071 A EP99105071 A EP 99105071A EP 99105071 A EP99105071 A EP 99105071A EP 0947597 A3 EP0947597 A3 EP 0947597A3
Authority
EP
European Patent Office
Prior art keywords
hot
annealing
grain
producing
steel sheet
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
EP99105071A
Other languages
German (de)
French (fr)
Other versions
EP0947597B1 (en
EP0947597A2 (en
EP0947597B2 (en
Inventor
Tomoji c/oNIPPON STEEL CORP. YAWATA WORKS Kumano
Norikazu c/oNIPPON STEEL CORP YAWATA WORK Fujii
Katsuro c/o NITTETSU PLANT DESIGNING CORP Kuroki
Koji c/oNIPPON STEEL CORP. YAWATA WORKS Yamasaki
Yoshifumi NIPPON STEEL CORP. YAWATA WORK Ohata
Hisashi c/o NIPPON STEEL CORP. YAWATA WORKS Mogi
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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Filing date
Publication date
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Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to DE69923102.7T priority Critical patent/DE69923102T3/en
Publication of EP0947597A2 publication Critical patent/EP0947597A2/en
Publication of EP0947597A3 publication Critical patent/EP0947597A3/en
Publication of EP0947597B1 publication Critical patent/EP0947597B1/en
Application granted granted Critical
Publication of EP0947597B2 publication Critical patent/EP0947597B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C21D8/1255—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 with diffusion of elements, e.g. decarburising, nitriding
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C21D8/1272—Final recrystallisation annealing

Landscapes

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

Abstract

A method for producing a grain-oriented electrical steel sheet excellent in magnetic characteristics is provided wherein differentiated use of primary and secondary inhibitors enables production without high temperature slab heating, few glass film defects and no lack of uniformity in secondary recrystallization.
A slab containing 0.025 ∼ 0.10% of C, 2.5 ∼ 4.0% of Si as well as acid-soluble Al, Mn, Cu, N, and Seq = (S + 0.406 Se) of 0.008 ∼ 0.05% is reheated to a temperature of more than 1050°C and lower than 1350°C and hot-rolled into a hot-rolled strip. The hot-rolled strip is optionally annealed, subjected to at least one cold rolling with intermediate annealing, whereafter the sheet is decarburization annealed to have primary recrystallization grains after completion of the decarburization annealing of an average diameter of not less than 7 µm and less than 18 µm, nitrided up to the start of secondary recrystallization, coated with an annealing separator composed mainly of MgO, and subjected to final finish annealing.
EP99105071.7A 1998-03-30 1999-03-23 Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics Expired - Lifetime EP0947597B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE69923102.7T DE69923102T3 (en) 1998-03-30 1999-03-23 Process for producing a grain-oriented electrical steel sheet having excellent magnetic properties

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP8400798 1998-03-30
JP8400798 1998-03-30
JP30750798 1998-10-28
JP30750798 1998-10-28

Publications (4)

Publication Number Publication Date
EP0947597A2 EP0947597A2 (en) 1999-10-06
EP0947597A3 true EP0947597A3 (en) 2001-01-31
EP0947597B1 EP0947597B1 (en) 2005-01-12
EP0947597B2 EP0947597B2 (en) 2015-06-10

Family

ID=26425094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105071.7A Expired - Lifetime EP0947597B2 (en) 1998-03-30 1999-03-23 Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics

Country Status (3)

Country Link
EP (1) EP0947597B2 (en)
KR (1) KR19990078406A (en)
DE (1) DE69923102T3 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010064942A (en) * 1999-12-20 2001-07-11 이구택 A method for manufacturing grain oriented electric steel having superior magnetic property
KR100501002B1 (en) * 2000-05-24 2005-07-18 주식회사 포스코 A method for manufacturing grain oriented electric steel sheet
EP1162280B1 (en) * 2000-06-05 2013-08-07 Nippon Steel & Sumitomo Metal Corporation Method for producing a grain-oriented electrical steel sheet excellent in magnetic properties
KR100501003B1 (en) * 2000-06-16 2005-07-18 주식회사 포스코 A method for manufacturing grain oriented electric steel sheet
IT1316026B1 (en) * 2000-12-18 2003-03-26 Acciai Speciali Terni Spa PROCEDURE FOR THE MANUFACTURE OF ORIENTED GRAIN SHEETS.
KR100544637B1 (en) * 2001-12-24 2006-01-24 주식회사 포스코 A method for grain-oriented electrical steel sheet with good magnetic properties
DE10311215B4 (en) * 2003-03-14 2005-09-15 Thyssenkrupp Electrical Steel Gmbh Method for producing grain-oriented, cold-rolled electrical sheet or strip
KR100721822B1 (en) * 2005-12-20 2007-05-28 주식회사 포스코 The grain-oriented electrical steel sheet manufacturing method with low iron core loss, high magnetic induction
KR100957911B1 (en) * 2007-12-28 2010-05-13 주식회사 포스코 Grain oriented electrical steel having excellent magnetic properties and manufacturing method for the same
US8303730B2 (en) 2008-09-10 2012-11-06 Nippon Steel Corporation Manufacturing method of grain-oriented electrical steel sheet
KR101051743B1 (en) * 2008-12-03 2011-07-25 주식회사 포스코 Oriented electrical steel with excellent magnetic properties and manufacturing method thereof
KR101346537B1 (en) 2009-04-06 2013-12-31 신닛테츠스미킨 카부시키카이샤 Method for treating steel for directional electromagnetic steel plate and method for producing directional electromagnetic steel plate
DE102011054004A1 (en) * 2011-09-28 2013-03-28 Thyssenkrupp Electrical Steel Gmbh Method for producing a grain-oriented electrical tape or sheet intended for electrical applications
WO2013089297A1 (en) 2011-12-16 2013-06-20 주식회사 포스코 Method for manufacturing grain-oriented electrical steel sheets having excellent magnetic properties
KR101521253B1 (en) * 2012-11-15 2015-05-18 주식회사 포스코 Grain-orinented electrical steel sheet and method for manufacturing the same
KR101480498B1 (en) * 2012-12-28 2015-01-08 주식회사 포스코 Oriented electrical steel sheet and method for manufacturing the same
CZ2014325A3 (en) * 2014-05-12 2015-11-11 Arcelormittal Ostrava A.S. Strip of oriented transformer steel and process for producing thereof
KR101677551B1 (en) * 2014-12-18 2016-11-18 주식회사 포스코 Grain-oriented electrical steel sheet and method for manufacturing the same
DE102017220714B3 (en) * 2017-11-20 2019-01-24 Thyssenkrupp Ag Optimization of the nitrogen level during the hood annealing

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956522A (en) * 1982-09-24 1984-04-02 Nippon Steel Corp Manufacture of anisotropic electrical steel plate with improved iron loss
EP0339474A1 (en) * 1988-04-25 1989-11-02 Nippon Steel Corporation Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics
EP0219611B1 (en) * 1985-08-15 1990-05-16 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
JPH02182866A (en) * 1989-01-07 1990-07-17 Nippon Steel Corp Sheet for grain-oriented silicon steel sheet
EP0378131A2 (en) * 1989-01-07 1990-07-18 Nippon Steel Corporation A method of manufacturing a grain-oriented electrical steel strip
JPH03189964A (en) * 1989-12-20 1991-08-19 Matsushita Electric Ind Co Ltd Data reproducing device
DE4311151C1 (en) * 1993-04-05 1994-07-28 Thyssen Stahl Ag Grain-orientated electro-steel sheets with good properties
EP0743370A2 (en) * 1995-05-16 1996-11-20 Armco Inc. Grain oriented electrical steel having high volume resistivity and method for producing same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1284268B1 (en) † 1996-08-30 1998-05-14 Acciai Speciali Terni Spa PROCEDURE FOR THE PRODUCTION OF GRAIN ORIENTED MAGNETIC SHEETS, WITH HIGH MAGNETIC CHARACTERISTICS, STARTING FROM
IT1285153B1 (en) † 1996-09-05 1998-06-03 Acciai Speciali Terni Spa PROCEDURE FOR THE PRODUCTION OF GRAIN ORIENTED MAGNETIC SHEET, STARTING FROM THIN SHEET.
IT1290977B1 (en) † 1997-03-14 1998-12-14 Acciai Speciali Terni Spa PROCEDURE FOR CHECKING THE INHIBITION IN THE PRODUCTION OF GRAIN ORIENTED MAGNETIC SHEET

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956522A (en) * 1982-09-24 1984-04-02 Nippon Steel Corp Manufacture of anisotropic electrical steel plate with improved iron loss
US4623407A (en) * 1982-09-24 1986-11-18 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet having a high magnetic flux density
EP0219611B1 (en) * 1985-08-15 1990-05-16 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
EP0339474A1 (en) * 1988-04-25 1989-11-02 Nippon Steel Corporation Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics
JPH05112827A (en) * 1988-04-25 1993-05-07 Nippon Steel Corp Manufacture of grain-oriented silicon steel sheet excellent in magnetic property and coating film pr0perty
JPH02182866A (en) * 1989-01-07 1990-07-17 Nippon Steel Corp Sheet for grain-oriented silicon steel sheet
EP0378131A2 (en) * 1989-01-07 1990-07-18 Nippon Steel Corporation A method of manufacturing a grain-oriented electrical steel strip
JPH03189964A (en) * 1989-12-20 1991-08-19 Matsushita Electric Ind Co Ltd Data reproducing device
DE4311151C1 (en) * 1993-04-05 1994-07-28 Thyssen Stahl Ag Grain-orientated electro-steel sheets with good properties
JPH06322443A (en) * 1993-04-05 1994-11-22 Thyssen Stahl Ag Production of grain-oriented magentic steel sheet reduced in iron loss
EP0743370A2 (en) * 1995-05-16 1996-11-20 Armco Inc. Grain oriented electrical steel having high volume resistivity and method for producing same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 456 (C - 0765) 2 October 1990 (1990-10-02) *

Also Published As

Publication number Publication date
DE69923102D1 (en) 2005-02-17
EP0947597B1 (en) 2005-01-12
DE69923102T3 (en) 2015-10-15
DE69923102T2 (en) 2005-12-29
KR19990078406A (en) 1999-10-25
EP0947597A2 (en) 1999-10-06
EP0947597B2 (en) 2015-06-10

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