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1. WO2022004678 - GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET PRODUCTION METHOD AND EQUIPMENT LINE

Publication Number WO/2022/004678
Publication Date 06.01.2022
International Application No. PCT/JP2021/024424
International Filing Date 28.06.2021
IPC
B21B 45/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
45Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
C21D 8/12 2006.1
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 2006.1
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 2006.1
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
B21B 37/74 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
37Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
74Temperature control, e.g. by cooling or heating the rolls or the product
H01F 1/147 2006.1
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
B21B 37/74
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
37Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
74Temperature control, e.g. by cooling or heating the rolls or the product
B21B 45/00
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
BROLLING OF METAL
45Devices for surface ; or other; treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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, e.g. BY DECARBURISATION OR TEMPERING
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
  • 新垣 之啓 SHINGAKI Yukihiro
  • 荒川 哲矢 ARAKAWA Tetsuya
  • 下山 祐介 SHIMOYAMA Yusuke
  • 世良 文香 SERA Ayaka
Agents
  • 杉村 憲司 SUGIMURA Kenji
Priority Data
2020-11354430.06.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET PRODUCTION METHOD AND EQUIPMENT LINE
(FR) PROCÉDÉ DE PRODUCTION DE TÔLE D'ACIER ÉLECTROMAGNÉTIQUE À GRAINS ORIENTÉS ET LIGNE D'ÉQUIPEMENT
(JA) 方向性電磁鋼板の製造方法及び設備列
Abstract
(EN) Provided is a production method for a grain-oriented electromagnetic steel sheet that, when viewed in hot-rolled coil units, has a uniform aggregate structure across the entire length in the longitudinal direction and has little fluctuation in magnetic properties. This production method for a grain-oriented electromagnetic steel sheet includes: hot rolling a steel slab having a prescribed component composition, and forming a hot-rolled plate; annealing the hot-rolled plate to form an annealed hot-rolled plate; cold rolling the annealed hot-rolled plate once, or twice with intermediate annealing in between, to form a cold-rolled plate having a final plate thickness; and subjecting the cold-rolled plate to primary recrystallization annealing or secondary recrystallization annealing. At least one cold rolling process has a total pressure reduction rate of at least 80% and is performed using a tandem roller. Rolling performed using at least one stand of the tandem roller has a pressure reduction rate of at least 30% and occurs at a temperature T0 °C for insertion into the work roll of the stand. However, the temperature for insertion into the work roll at at least either the tip or tail, or both, of the annealed hot-rolled plate is at least 70°C and at least 10°C higher than the temperature T0 °C of the steel plate.
(FR) L'invention concerne un procédé de production d'une tôle d'acier électromagnétique à grains orientés qui, vu dans des unités de bobine laminée à chaud, possède une structure d'agrégat uniforme sur toute la longueur dans la direction longitudinale et présente peu de fluctuation dans les propriétés magnétiques. Ce procédé de production d'une tôle d'acier électromagnétique à grains orientés comprend les étapes consistant à : laminer à chaud une brame d'acier ayant une composition de composant prescrite, et former une plaque laminée à chaud; recuire la plaque laminée à chaud pour former une plaque laminée à chaud recuite; laminer à froid la plaque laminée à chaud recuite une fois, ou deux fois avec un recuit intermédiaire entre, pour former une plaque laminée à froid ayant une épaisseur de plaque finale; et soumettre la plaque laminée à froid à un recuit de recristallisation primaire ou à un recuit de recristallisation secondaire. Au moins un procédé de laminage à froid présente un taux de réduction de pression totale d'au moins 80 % et est réalisé à l'aide d'un rouleau tandem. Le laminage réalisé à l'aide d'au moins une cage du rouleau tandem présente un taux de réduction de pression d'au moins 30 % et se produit à une température T0 °C pour une insertion dans le rouleau de travail de la cage. Cependant, la température pour insertion dans le rouleau de travail au niveau d'au moins l'extrémité ou la queue, ou les deux, de la tôle laminée à chaud recuite est d'au moins 70 °C et d'au moins 10 °C supérieure à la température T0 °C de la plaque d'acier.
(JA) 熱延コイル単位で見た場合、長手方向全長に亘って均一化された集合組織を有し、磁気特性の変動の小さい方向性電磁鋼板の製造方法を提供する。 所定の成分組成を有する鋼スラブを、熱間圧延して熱延板とし、前記熱延板を焼鈍して熱延板焼鈍板とし、前記熱延板焼鈍板に1回又は中間焼鈍を挟んだ2回以上の冷間圧延を施して最終板厚の冷延板とし、前記冷延板に一次再結晶焼鈍及び二次再結晶焼鈍を施すことを含む、方向性電磁鋼板の製造方法であって、少なくとも1回の冷間圧延は、総圧下率が80%以上であり、かつタンデム圧延機により行われ、前記タンデム圧延機の少なくとも1つのスタンドで行われる圧延は、圧下率30%以上であり、かつ前記スタンドのワークロールへのかみ込み温度T0℃の条件で行われるが、ただし、前記熱延板焼鈍板の先端及び尾端の一方又は両方の前記ワークロールへのかみ込み温度を、70℃以上、かつ前記鋼板の温度T0℃よりも10℃以上高い温度とする、方向性電磁鋼板の製造方法。
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