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1. (WO2019065645) GRAIN-ORIENTED ELECTRICAL STEEL SHEET
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Pub. No.: WO/2019/065645 International Application No.: PCT/JP2018/035495
Publication Date: 04.04.2019 International Filing Date: 25.09.2018
IPC:
C21D 8/12 (2006.01) ,C22C 38/00 (2006.01) ,C23C 22/00 (2006.01) ,H01F 1/147 (2006.01) ,C22C 38/60 (2006.01)
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING 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
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
12
during manufacturing of articles with special electromagnetic properties
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C CHEMISTRY; METALLURGY
23
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C
COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
22
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1
Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01
of inorganic materials
03
characterised by their coercivity
12
of soft-magnetic materials
14
metals or alloys
147
Alloys characterised by their composition
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
60
containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulfur
Applicants:
JFEスチール株式会社 JFE STEEL CORPORATION [JP/JP]; 東京都千代田区内幸町二丁目2番3号 2-3, Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo 1000011, JP
Inventors:
千田 邦浩 SENDA Kunihiro; JP
渡辺 誠 WATANABE Makoto; JP
岡部 誠司 OKABE Seiji; JP
吉▲崎▼ 聡一郎 YOSHIZAKI Souichiro; JP
Agent:
杉村 憲司 SUGIMURA Kenji; JP
Priority Data:
2017-18873428.09.2017JP
Title (EN) GRAIN-ORIENTED ELECTRICAL STEEL SHEET
(FR) TÔLE D’ACIER ÉLECTRIQUE À GRAINS ORIENTÉS
(JA) 方向性電磁鋼板
Abstract:
(EN) According to the present invention, a grain-oriented electrical steel sheet is provided, the grain-oriented steel sheet having a coating film, which contains a certain forsterite as a main component, on the front and back surfaces of the steel sheet, and having a plurality of grooves on the surfaces of the steel sheet, wherein the grooves have an average depth of at least 6% of the thickness of the steel sheet and are spaced 1-15 mm apart from each other, the relative magnetic permeability μr15/50 when AC-magnetized at a frequency of 50 Hz and a maximum magnetic flux density of 1.5T is at least 35000, and the frequency with which portions isolated by being separated from a continuous portion of the coating film appear at the interface between the steel sheet and the coating film in a cross section perpendicular to the rolling direction of the steel sheet is 0.3/µm or less. As a result, a further reduction in iron loss in the grain-oriented electrical steel sheet can be achieved.
(FR) La présente invention concerne une tôle d’acier électrique à grains orientés, la tôle d’acier à grains orientés comportant un film de revêtement, qui contient une certaine forstérite en tant que composant principal, sur les surfaces avant et arrière de la tôle d’acier, et ayant une pluralité de rainures sur les surfaces de la tôle d’acier, les rainures ayant une profondeur moyenne d’au moins 6 % de l’épaisseur de la tôle d’acier et étant espacées de 1 à 15 mm les unes par rapport aux autres, la perméabilité magnétique relative μr15/50 lorsqu’elle est magnétisée en CA à une fréquence de 50 Hz et une densité de flux magnétique maximale de 1,5 T est d’au moins 35000, et la fréquence à laquelle des parties isolées en étant séparées d’une partie continue du film de revêtement apparaissent à l’interface entre la tôle d’acier et le film de revêtement dans une section transversale perpendiculaire à la direction de laminage de la tôle d’acier est de 0,3/µm ou moins. En conséquence, une réduction supplémentaire de la perte de fer dans la tôle d’acier électrique à grains orientés peut être obtenue.
(JA) 本発明に従い、鋼板の表裏面に所定のフォルステライトを主成分とする被膜を有し、前記鋼板の表面に、複数本の溝を有する方向性電磁鋼板について、前記溝は、平均深さが前記鋼板の厚みの6%以上および溝相互間の距離が1~15mmであり、周波数50Hzおよび最大磁束密度1.5Tで交流磁化させたときの比透磁率μr15/50が35000以上であり、前記鋼板の圧延方向と直交する断面の、前記鋼板と前記被膜との界面において前記被膜の連続部分から離間して孤立する部分の存在頻度を0.3個/μm以下とすることによって、方向性電磁鋼板の更なる低鉄損化を実現することができる。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)