EP0390142A3 - Process for producing grain-oriented electrical steel sheet having high magnetic flux density - Google Patents

Process for producing grain-oriented electrical steel sheet having high magnetic flux density Download PDF

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Publication number
EP0390142A3
EP0390142A3 EP19900106018 EP90106018A EP0390142A3 EP 0390142 A3 EP0390142 A3 EP 0390142A3 EP 19900106018 EP19900106018 EP 19900106018 EP 90106018 A EP90106018 A EP 90106018A EP 0390142 A3 EP0390142 A3 EP 0390142A3
Authority
EP
European Patent Office
Prior art keywords
rolling
hot
recrystallization
annealing
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.)
Granted
Application number
EP19900106018
Other languages
German (de)
French (fr)
Other versions
EP0390142A2 (en
EP0390142B2 (en
EP0390142B1 (en
Inventor
Yoshiyuki c/o Nippon Steel Co. R & D Ushigami
Tadashi c/o Nippon Steel Co. R & D Nakayama
Nobuyuki c/o Nippon Steel Co. R & D Takahasi
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
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26420973&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0390142(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP1079992A external-priority patent/JPH0689405B2/en
Priority claimed from JP1079991A external-priority patent/JPH0689404B2/en
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0390142A2 publication Critical patent/EP0390142A2/en
Publication of EP0390142A3 publication Critical patent/EP0390142A3/en
Application granted granted Critical
Publication of EP0390142B1 publication Critical patent/EP0390142B1/en
Publication of EP0390142B2 publication Critical patent/EP0390142B2/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
    • 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
    • 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

Abstract

A process for producing a grain-oriented electrical steel sheet having a high magnetic flux density, comprising the steps of: heating a steel slab comprising 1.8 to 4.8 wt% Si, 0.012 to 0.050 wt% acid-­ soluble Al, 0.010 wt% or less N, and the balance consisting of Fe and unavoidable impurities, to a temperature for hot rolling; hot-rolling the heated slab to form a hot-rolled strip; cold-rolling the hot-rolled strip to a final product sheet thickness at a final cold rolling reduction of 80% or more by a single step of cold rolling or by two or more steps of cold rolling with an intermediate annealing step inserted therebetween; primary-recrystallization-annealing the cold-rolled strip; final-annealing the primary-­ recrystallization-annealed strip so that secondary-­ recrystallized grains substantially completely grow up in a temperature region of from 1000 to 1100°C and then purification is effected above 1100°C; and subjecting the primary-recrystallization-annealed steel strip to a nitriding treatment before a secondary recrystallization occurs during the final annealing.
EP19900106018 1989-03-30 1990-03-29 Process for producing grain-oriented electrical steel sheet having high magnetic flux density Expired - Lifetime EP0390142B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1079992A JPH0689405B2 (en) 1989-03-30 1989-03-30 Method for manufacturing unidirectional electrical steel sheet with high magnetic flux density
JP79992/89 1989-03-30
JP79991/89 1989-03-30
JP1079991A JPH0689404B2 (en) 1989-03-30 1989-03-30 Method for manufacturing unidirectional electrical steel sheet with high magnetic flux density

Publications (4)

Publication Number Publication Date
EP0390142A2 EP0390142A2 (en) 1990-10-03
EP0390142A3 true EP0390142A3 (en) 1992-09-30
EP0390142B1 EP0390142B1 (en) 1996-06-26
EP0390142B2 EP0390142B2 (en) 1999-04-28

Family

ID=26420973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900106018 Expired - Lifetime EP0390142B2 (en) 1989-03-30 1990-03-29 Process for producing grain-oriented electrical steel sheet having high magnetic flux density

Country Status (2)

Country Link
EP (1) EP0390142B2 (en)
DE (1) DE69027553T3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354389A (en) * 1991-07-29 1994-10-11 Nkk Corporation Method of manufacturing silicon steel sheet having grains precisely arranged in Goss orientation
JP2519615B2 (en) * 1991-09-26 1996-07-31 新日本製鐵株式会社 Method for producing grain-oriented electrical steel sheet with excellent magnetic properties
JP2620438B2 (en) * 1991-10-28 1997-06-11 新日本製鐵株式会社 Manufacturing method of grain-oriented electrical steel sheet with high magnetic flux density
KR960010811B1 (en) * 1992-04-16 1996-08-09 신니뽄세이데스 가부시끼가이샤 Process for production of grain oriented electrical steel sheet having excellent magnetic properties
JP2659655B2 (en) * 1992-09-04 1997-09-30 新日本製鐵株式会社 Thick grain-oriented electrical steel sheet with excellent magnetic properties
US6858095B2 (en) 1992-09-04 2005-02-22 Nippon Steel Corporation Thick grain-oriented electrical steel sheet exhibiting excellent magnetic properties
US5858126A (en) * 1992-09-17 1999-01-12 Nippon Steel Corporation Grain-oriented electrical steel sheet and material having very high magnetic flux density and method of manufacturing same
KR0183408B1 (en) * 1992-09-17 1999-04-01 다나카 미노루 Grain-oriented electrical steel sheet and material having very high magnetic flux density and method of manufacturing the same
US5288736A (en) * 1992-11-12 1994-02-22 Armco Inc. Method for producing regular grain oriented electrical steel using a single stage cold reduction
DE4311151C1 (en) * 1993-04-05 1994-07-28 Thyssen Stahl Ag Grain-orientated electro-steel sheets with good properties
EP1179603B1 (en) * 2000-08-08 2011-03-23 Nippon Steel Corporation Method to produce grain-oriented electrical steel sheet having high magnetic flux density
DE10311215B4 (en) * 2003-03-14 2005-09-15 Thyssenkrupp Electrical Steel Gmbh Method for producing grain-oriented, cold-rolled electrical sheet or strip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867559A (en) * 1956-12-31 1959-01-06 Gen Electric Method for producing grain oriented silicon steel
EP0098324A1 (en) * 1982-07-08 1984-01-18 Nippon Steel Corporation Process for producing aluminum-bearing grain-oriented silicon steel strip
EP0307905A2 (en) * 1987-09-18 1989-03-22 Nippon Steel Corporation Method for producing grainoriented electrical steel sheet with very high magnetic flux density
EP0219611B1 (en) * 1985-08-15 1990-05-16 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59215419A (en) * 1983-05-20 1984-12-05 Nippon Steel Corp Production of grain-oriented silicon steel sheet having high magnetic flux density
JPH0617512B2 (en) * 1986-03-22 1994-03-09 新日本製鐵株式会社 Method for producing unidirectional electrical steel sheet with extremely high magnetic flux density

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867559A (en) * 1956-12-31 1959-01-06 Gen Electric Method for producing grain oriented silicon steel
EP0098324A1 (en) * 1982-07-08 1984-01-18 Nippon Steel Corporation Process for producing aluminum-bearing grain-oriented silicon steel strip
EP0219611B1 (en) * 1985-08-15 1990-05-16 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
EP0307905A2 (en) * 1987-09-18 1989-03-22 Nippon Steel Corporation Method for producing grainoriented electrical steel sheet with very high magnetic flux density

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 84 (C-482)17 March 1988 & JP-A-62 222 024 ( NIPPON STEEL ) 30 September 1987 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 82 (C-275)(1805) 11 April 1985 & JP-A-59 215 419 ( SHIN NIPPON SEITETSU ) 5 December 1984 *

Also Published As

Publication number Publication date
DE69027553T3 (en) 1999-11-11
DE69027553T2 (en) 1997-02-20
EP0390142A2 (en) 1990-10-03
EP0390142B2 (en) 1999-04-28
EP0390142B1 (en) 1996-06-26
DE69027553D1 (en) 1996-08-01

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