EP0392535A3 - Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties - Google Patents

Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties Download PDF

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Publication number
EP0392535A3
EP0392535A3 EP19900107030 EP90107030A EP0392535A3 EP 0392535 A3 EP0392535 A3 EP 0392535A3 EP 19900107030 EP19900107030 EP 19900107030 EP 90107030 A EP90107030 A EP 90107030A EP 0392535 A3 EP0392535 A3 EP 0392535A3
Authority
EP
European Patent Office
Prior art keywords
hot
rolled
reduction ratio
grain
magnetic properties
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
EP19900107030
Other languages
German (de)
French (fr)
Other versions
EP0392535A2 (en
EP0392535B1 (en
EP0392535B2 (en
Inventor
Yasunari c/o R&D Lab. III Nippon Steel Yoshitomi
Takehide c/o R&D Lab. II Nippon Steel Senuma
Yozo c/o R&D Lab. III Nippon Steel Suga
Nobuyuki c/o R&D Lab. III Nippon Steel Takahashi
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=26435691&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0392535(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP1094412A external-priority patent/JPH0788531B2/en
Priority claimed from JP1094413A external-priority patent/JP2787776B2/en
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0392535A2 publication Critical patent/EP0392535A2/en
Publication of EP0392535A3 publication Critical patent/EP0392535A3/en
Publication of EP0392535B1 publication Critical patent/EP0392535B1/en
Application granted granted Critical
Publication of EP0392535B2 publication Critical patent/EP0392535B2/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
    • C21D8/1216—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
    • C21D8/1216—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

Abstract

A silicon steel slab comprising 0.05 to 0.8% by weight of Mn and up to 0.014% by weight of S + 0.405Se is heated at a temperature lower than 1280°C and hot-­ rolled under such conditions that the hot rolling-finish temperature is 700 to 1150°C, the cumulative reduction ratio at the final three passes is at least 40%, and the reduction ratio at the final pass is at least 20%, or this silicon steel slab is hot-rolled at a hot rolling-­ finish temperature of 750 to 1150°C while adopting the above-mentioned reduction ratio according to need, is maintained at a temperature not lower than 700°C for at least 1 second, and wound at a winding temperature lower than 700°C. The hot-rolled sheet is subjected to the hot-rolled sheet annealing, finally cold-rolled at a reduction ratio of at least 80%, subjected to the decarburization annealing, and then subjected to the final finish annealing. According to this process, a grain-oriented electrical steel sheet having superior magnetic properties is obtained.
EP19900107030 1989-04-14 1990-04-12 Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties Expired - Lifetime EP0392535B2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP9441389 1989-04-14
JP94413/89 1989-04-14
JP1094412A JPH0788531B2 (en) 1989-04-14 1989-04-14 Method for producing unidirectional electrical steel sheet with excellent magnetic properties
JP1094413A JP2787776B2 (en) 1989-04-14 1989-04-14 Manufacturing method of grain-oriented electrical steel sheet with excellent magnetic properties
JP94412/89 1989-04-14
JP9441289 1989-04-14

Publications (4)

Publication Number Publication Date
EP0392535A2 EP0392535A2 (en) 1990-10-17
EP0392535A3 true EP0392535A3 (en) 1992-09-30
EP0392535B1 EP0392535B1 (en) 1995-09-27
EP0392535B2 EP0392535B2 (en) 2002-10-16

Family

ID=26435691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900107030 Expired - Lifetime EP0392535B2 (en) 1989-04-14 1990-04-12 Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties

Country Status (2)

Country Link
EP (1) EP0392535B2 (en)
DE (1) DE69022617T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998048062A1 (en) * 1997-04-24 1998-10-29 Acciai Speciali Terni S.P.A. New process for the production of high-permeability electrical steel from thin slabs
DE102007005015A1 (en) 2006-06-26 2008-01-03 Sms Demag Ag Process and plant for the production of hot rolled strip of silicon steel based on thin slabs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2016987A (en) * 1978-03-11 1979-10-03 Nippon Steel Corp Process for producing grainoriented silicon steel sheet
GB2095287A (en) * 1981-03-19 1982-09-29 Allegheny Ludlum Steel 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
GB2130241A (en) * 1982-09-24 1984-05-31 Nippon Steel Corp 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2016987A (en) * 1978-03-11 1979-10-03 Nippon Steel Corp Process for producing grainoriented silicon steel sheet
GB2095287A (en) * 1981-03-19 1982-09-29 Allegheny Ludlum Steel 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
GB2130241A (en) * 1982-09-24 1984-05-31 Nippon Steel Corp 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

Also Published As

Publication number Publication date
DE69022617D1 (en) 1995-11-02
DE69022617T2 (en) 1996-03-21
EP0392535A2 (en) 1990-10-17
EP0392535B1 (en) 1995-09-27
DE69022617T3 (en) 2003-04-03
EP0392535B2 (en) 2002-10-16

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