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1. WO2020067136 - GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME

Publication Number WO/2020/067136
Publication Date 02.04.2020
International Application No. PCT/JP2019/037543
International Filing Date 25.09.2019
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 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
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
H01F 1/147 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
147Alloys characterised by their composition
CPC
C21D 8/12
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 38/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/60
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
H01F 1/147
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
147Alloys characterised by their composition
Applicants
  • JFEスチール株式会社 JFE STEEL CORPORATION [JP]/[JP]
Inventors
  • 渡邉 誠 WATANABE Makoto
  • 児玉 英優 KODAMA Hidemasa
Agents
  • 特許業務法人銀座マロニエ特許事務所 GINZA MARONIE P.C.
Priority Data
2018-18221927.09.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING SAME
(FR) TÔLE D'ACIER ÉLECTROMAGNÉTIQUE À GRAINS ORIENTÉS ET SON PROCÉDÉ DE FABRICATION
(JA) 方向性電磁鋼板とその製造方法
Abstract
(EN)
In the present invention, during manufacturing of a grain-oriented electromagnetic steel sheet, by hot rolling and cold rolling a steel raw material for a grain-oriented electromagnetic steel sheet, performing decarburization annealing which doubles as a primary recrystallization annealing, then applying an annealing separating agent having MgO as the main component thereof, and performing finish annealing, by adjusting the decarburization annealing conditions and the conditions in steps prior to the decarburization annealing so that the difference in concentration between the front and back surfaces of the steel sheet of O, Si, Al, Mn, and P after the decarburization annealing is within a predetermined range with respect to the average concentration in the front and back surfaces, and by making the difference in concentration between the front and back surfaces in the product sheet of each of O, Si, and Mg ±5% or less, the difference in concentration between the front and back surfaces of at least one of Al, Mn, and P ±15% or less, and the difference in concentration between the front and back surfaces of at least one of Ca and Ti ±20% or less, a grain-oriented electromagnetic steel sheet is manufactured which has good film characteristics irrespective of the in-coil position thereof during finish annealing.
(FR)
Dans la présente invention, pendant la fabrication d'une tôle d'acier électromagnétique à grains orientés, par laminage à chaud et laminage à froid d'une matière première d'acier destinée à une tôle d'acier électromagnétique à grains orientés, effectuer un recuit de décarburation qui sert également de recuit de recristallisation primaire, puis appliquer un agent de séparation de recuit dont MgO est le composant principal, et effectuer un recuit de finition, en ajustant les conditions de recuit de décarburation et les conditions dans les étapes précédent le recuit de décarburation de sorte que la différence de concentration entre les surfaces avant et arrière de la tôle d'acier pour O, Si, Al, Mn et P après le recuit de décarburation se trouve dans une plage prédéterminée par rapport à la concentration moyenne dans les surfaces avant et arrière, et en amenant la différence de concentration entre les surfaces avant et arrière dans la feuille de produit de chacun parmi O, Si et Mg à ± 5 % ou moins, la différence de concentration entre les surfaces avant et arrière d'au moins l'un parmi Al, Mn et P à ± 15 % ou moins, et la différence de concentration entre les surfaces avant et arrière d'au moins un élément parmi Ca et Ti à ± 20 % ou moins, une tôle d'acier électromagnétique à grains orientés est fabriquée qui présente de bonnes caractéristiques de film quelle que soit sa position dans la bobine pendant le recuit de finition.
(JA)
方向性電磁鋼板用の鋼素材を熱間圧延し、冷間圧延し、一次再結晶焼鈍を兼ねた脱炭焼鈍を施した後、MgOを主体とする焼鈍分離剤を塗布し、仕上焼鈍して方向性電磁鋼板を製造する際、上記脱炭焼鈍後の鋼板のO,Si,Al,MnおよびPの表裏面の濃度差が、表裏面の平均濃度に対して、所定の範囲内に収まるよう脱炭焼鈍条件および脱炭焼鈍より前工程の条件を調整し、製品板におけるO,SiおよびMgのすべての表裏面濃度差が±5%以内、Al,MnおよびPのうちの1種以上の表裏面濃度差が±15%以内、CaおよびTiのうちの1種以上の表裏面濃度差が±20%以内とすることで、仕上焼鈍時のコイル内位置に拘わらず、良好な被膜特性を有する方向性電磁鋼板を製造する。
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