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1. WO2012055224 - MANUFACTURE METHOD OF HIGH EFFICIENCY NON-ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE

Publication Number WO/2012/055224
Publication Date 03.05.2012
International Application No. PCT/CN2011/073373
International Filing Date 27.04.2011
IPC
C21D 8/12 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
C22C 38/60 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
60containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
CPC
C21D 8/005
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
005of ferrous alloys
C21D 8/1261
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
1244the heat treatment(s) being of interest
1261following hot rolling
C21D 8/1272
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
12during manufacturing of articles with special electromagnetic properties
1244the heat treatment(s) being of interest
1272Final recrystallisation annealing
C22C 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
C22C 38/002
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
002containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
C22C 38/004
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
004Very low carbon steels, i.e. having a carbon content of less than 0,01%
Applicants
  • 宝山钢铁股份有限公司 BAOSHAN IRON & STEEL CO., LTD. [CN]/[CN] (AllExceptUS)
  • 马爱华 MA, Aihua [CN]/[CN] (UsOnly)
  • 王波 WANG, Bo [CN]/[CN] (UsOnly)
  • 谢世殊 XIE, Shishu [CN]/[CN] (UsOnly)
  • 胡瞻源 HU, Zhanyuan [CN]/[CN] (UsOnly)
  • 邹亮 ZOU, Liang [CN]/[CN] (UsOnly)
  • 王子涛 WANG, Zitao [CN]/[CN] (UsOnly)
  • 朱雨华 ZHU, Yuhua [CN]/[CN] (UsOnly)
  • 黄杰 HUANG, Jie [CN]/[CN] (UsOnly)
  • 金冰忠 JIN, Bingzhong [CN]/[CN] (UsOnly)
  • 刘献东 LIU, Xiandong [CN]/[CN] (UsOnly)
Inventors
  • 马爱华 MA, Aihua
  • 王波 WANG, Bo
  • 谢世殊 XIE, Shishu
  • 胡瞻源 HU, Zhanyuan
  • 邹亮 ZOU, Liang
  • 王子涛 WANG, Zitao
  • 朱雨华 ZHU, Yuhua
  • 黄杰 HUANG, Jie
  • 金冰忠 JIN, Bingzhong
  • 刘献东 LIU, Xiandong
Agents
  • 上海专利商标事务所有限公司 SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC
Priority Data
201010518012.525.10.2010CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) MANUFACTURE METHOD OF HIGH EFFICIENCY NON-ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE
(FR) PROCÉDÉ DE FABRICATION D'UN ACIER AU SILICIUM NON ORIENTÉ DE GRANDE QUALITÉ AVEC DE BONNES PERFORMANCES MAGNÉTIQUES
(ZH) 一种磁性优良的高效无取向硅钢制造方法
Abstract
(EN)
Manufacture method of high efficiency non-oriented silicon steel having good magnetic performance is disclosed. The method comprises the following steps: 1) smelting and casting, wherein the non-oriented silicon steel, having the components (in wt%) as follows: C ≤0.0040%, Si 0.1-0.8%, Al 0.002-1.0%, Mn 0.10-1.50%, P ≤ 0.2%, Sb 0.04-0.08%, S ≤ 0.0030%, N ≤0.0020%, Ti ≤0.0020%, balance Fe and inevitable impurities, is subjected to smelting and casting to form casting blank; 2) hot rolling, wherein blank heating temperature is 1100℃-1150℃ and final rolling temperature is 860-920℃, air cooling after hot rolling with cooling time of (2+30×Sb%)s≤t≤7s, coiling at condition of ≥720℃; 3) acid cleaning and cold rolling, wherein the reduction rate is 70-78%; 4) annealing at a temperature of 800-1000℃ with heating speed of ≥15℃/s, and keeping for 10s-25s. High efficiency electric steel is manufactured in low cost by adding element beneficial for texture, controlling the content of deteriorating elements during steel smelting, controlling the time of air cooling for hot rolling and accompanying high temperature coiling with assuring magnetic performance.
(FR)
L'invention concerne un procédé de fabrication d'un acier au silicium non orienté de grande qualité avec de bonnes performances magnétiques, qui comprend les étapes suivantes : 1) fusion et coulée, où l'acier au silicium non orienté, qui comprend les composants suivants (en % en poids) : C ≤ 0,0040 %, Si 0,1-0,8 %, Al 0,002-1,0 %, Mn 0,10-1,50 %, P ≤ 0,2 %, Sb 0,04-0,08 %, S ≤ 0,0030 %, N ≤ 0,0020 %, Ti ≤ 0,0020 %, le solde étant du fer et les inévitables impuretés, est soumis à une fusion et une coulée pour former un flanc; 2) laminage à chaud, où la température de chauffage du flanc est de 1100-1150 °C, et la température finale de laminage est de 860-920 °C, puis refroidissement à l'air après laminage à chaud pendant un temps de refroidissement t respectant l'inéquation (2+30×%Sb) s ≤ t ≤ 7 s, et bobinage à une température supérieure à 720 °C; 3) nettoyage acide et laminage à froid, le taux de réduction étant de 70-78 %; 4) recuit à une température de 800-1000 °C avec une vitesse de chauffage supérieure à 15 °C/s, et maintien pendant 10-25 s. Un acier électrique de grande qualité peut être fabriqué à moindre coût en ajoutant des éléments bénéfiques pour la texture, en contrôlant la teneur des éléments néfastes pendant la fusion de l'acier, en contrôlant le temps du refroidissement à l'air pour le laminage à froid, et en accompagnant le bobinage à haute température, tout en assurant de bonnes performances magnétiques.
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