EP0205619A4 - Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties. - Google Patents

Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties.

Info

Publication number
EP0205619A4
EP0205619A4 EP19850900193 EP85900193A EP0205619A4 EP 0205619 A4 EP0205619 A4 EP 0205619A4 EP 19850900193 EP19850900193 EP 19850900193 EP 85900193 A EP85900193 A EP 85900193A EP 0205619 A4 EP0205619 A4 EP 0205619A4
Authority
EP
European Patent Office
Prior art keywords
magnetic properties
secondary recrystallization
inhibitor
silicon steel
steel slab
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
EP19850900193
Other languages
German (de)
French (fr)
Other versions
EP0205619B1 (en
EP0205619A1 (en
Inventor
Yukio Inokuchi
Shigeko Ikeda
Yoh Ito
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority claimed from PCT/JP1984/000599 external-priority patent/WO1986003784A1/en
Publication of EP0205619A1 publication Critical patent/EP0205619A1/en
Publication of EP0205619A4 publication Critical patent/EP0205619A4/en
Application granted granted Critical
Publication of EP0205619B1 publication Critical patent/EP0205619B1/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
    • C21D8/1227—Warm rolling
    • 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
    • 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
    • C21D8/1261—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 following hot rolling

Abstract

The material includes a great amount of Si, 3.1 to 4.5%. As an inhibitor, a mixture of a small amount of A and a trace of S or Se is employed, together with Mo. Moreover, a slab heating treatment is carried out at a temperature higher than 1,279<o> C until the scale loss at the time of heating becomes 2.7 to 5.0%, whereby the inhibitor is satisfactorily dissociated and formed into a solid solution. By so doing, the effect of suppressing the growth of primary recrystallization grains at the time of secondary recrystallization annealing is remarkably intensified, and the development of the secondary recrystallization grains of the [110] <001> orientation is facilitated. Thus, a secondary recrystallization texture is formed which is intensely oriented in the [110] <001> direction, thereby attaining increased magnetic flux density and reduced iron loss. Also, the cracking in the hot rolling step after the heating treatment is effectively prevented, thereby realizing improvements in the surface and magnetic properties.
EP85900193A 1984-12-14 1984-12-14 Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties Expired - Lifetime EP0205619B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1984/000599 WO1986003784A1 (en) 1983-06-20 1984-12-14 Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties

Publications (3)

Publication Number Publication Date
EP0205619A1 EP0205619A1 (en) 1986-12-30
EP0205619A4 true EP0205619A4 (en) 1987-11-12
EP0205619B1 EP0205619B1 (en) 1991-08-21

Family

ID=13818497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85900193A Expired - Lifetime EP0205619B1 (en) 1984-12-14 1984-12-14 Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties

Country Status (2)

Country Link
EP (1) EP0205619B1 (en)
DE (1) DE3484960D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666842A (en) * 1993-07-22 1997-09-16 Kawasaki Steel Corporation Method of cold rolling grain-oriented silicon steel sheet having excellent and uniform magnetic characteristics along rolling direction of coil and a roll cooling controller for cold rolling mill using the cold rolling method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280856A (en) * 1980-01-04 1981-07-28 Kawasaki Steel Corporation Method for producing grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss
US4478653A (en) * 1983-03-10 1984-10-23 Armco Inc. Process for producing grain-oriented silicon steel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5985820A (en) * 1982-11-08 1984-05-17 Kawasaki Steel Corp Production of unidirectional silicon steel plate having excellent surface characteristic

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280856A (en) * 1980-01-04 1981-07-28 Kawasaki Steel Corporation Method for producing grain-oriented silicon steel sheets having a very high magnetic induction and a low iron loss
US4478653A (en) * 1983-03-10 1984-10-23 Armco Inc. Process for producing grain-oriented silicon steel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 193 (C-241)[1630], 5th September 1984; & JP-A-59 085 820 (KAWASAKI SEITETSU K.K.) 17-05-1984 *
See also references of WO8603784A1 *

Also Published As

Publication number Publication date
EP0205619B1 (en) 1991-08-21
EP0205619A1 (en) 1986-12-30
DE3484960D1 (en) 1991-09-26

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