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1. (WO2019026113) ZINC HOT-DIPPED STEEL SHEET
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2019/026113 International Application No.: PCT/JP2017/027656
Publication Date: 07.02.2019 International Filing Date: 31.07.2017
IPC:
C22C 38/00 (2006.01) ,C21D 9/46 (2006.01) ,C22C 38/58 (2006.01) ,C23C 2/06 (2006.01) ,C23C 2/40 (2006.01)
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
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
9
Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor
46
for sheet metals
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
18
containing chromium
40
with nickel
58
with more than 1.5% by weight of manganese
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
2
Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
04
characterised by the coating material
06
Zinc or cadmium or alloys based thereon
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
2
Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
34
characterised by the shape of the material to be treated
36
Elongated material
40
Plates; Strips
Applicants:
新日鐵住金株式会社 NIPPON STEEL & SUMITOMO METAL CORPORATION [JP/JP]; 東京都千代田区丸の内二丁目6番1号 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071, JP
Inventors:
森下 敦司 MORISHITA, Atsushi; JP
金藤 泰平 KANETO, Taihei; JP
内田 智史 UCHIDA, Satoshi; JP
中田 達也 NAKADA, Tatsuya; JP
山口 裕司 YAMAGUCHI, Yuji; JP
Agent:
國分 孝悦 KOKUBUN, Takayoshi; JP
Priority Data:
Title (EN) ZINC HOT-DIPPED STEEL SHEET
(FR) TÔLE D'ACIER IMMERGÉE À CHAUD EN ZINC
(JA) 溶融亜鉛めっき鋼板
Abstract:
(EN) In the range of 1/8 to 3/8 of the thickness, centering on 1/4 of the thickness, from the surface of a parent material steel sheet, the ferrite phase has a volume fraction of 50% to 97%, the total of hard structures comprising one or more of the bainite phase, bainitic ferrite phase, fresh martensite phase and tempered martensite phase accounts for a volume fraction of at least 3%, retained austenite phase accounts for a volume fraction of 0% to 8%, the total of pearlite phase and coarse cementite phase accounts for a volume fraction of 0% to 8%, and at the interface between the zinc hot-dipped layer and the parent material steel sheet, there is an Fe-Al alloy layer having an average thickness of 0.1 µm to 2.0 µm and a difference between the maximum and minimum thickness in the steel sheet width direction of within 0.5 µm, and in a refined layer which is in direct contact with the Fe-Al alloy layer, the difference between the maximum and minimum thickness of the refined layer in the steel sheet width direction is within 2.0 µm.
(FR) Selon l'invention, dans la plage de 1/8 à 3/8 de l'épaisseur, en se centrant sur 1/4 de l'épaisseur, à partir de la surface d'une tôle d'acier de matériau parent, la phase de ferrite présente une fraction volumique de 50 % à 97 %, le total de structures dures comprenant une ou plusieurs éléments parmi la phase de bainite, la phase de ferrite bainitique, la phase de martensite fraîche et la phase de martensite trempée représente une fraction volumique d'au moins 3 %, la phase d'austénite résiduelle représente une fraction volumique de 0 % à 8 %, le total de la phase de perlite et de la phase de cémentite grossière représente une fraction volumique de 0 % à 8 %; et au niveau de l'interface entre la couche immergée à chaud en zinc et la tôle d'acier de matériau parent, est agencée une couche d'alliage Fe-Al présentant une épaisseur moyenne de 0,1 µm à 2,0 µm et une différence entre l'épaisseur maximale et minimale dans le sens de la largeur de la tôle d'acier inférieure ou égale à 0,5 µm; et dans une couche affinée qui est en contact direct avec la couche d'alliage Fe-Al, la différence entre l'épaisseur maximale et minimale de la couche affinée dans le sens de la largeur de la tôle d'acier est inférieure ou égale à 2,0 µm.
(JA) 母材鋼板の表面から1/4厚を中心とした1/8厚~3/8厚の範囲において、フェライト相が体積分率で50%以上97%以下、ベイナイト相とベイニティックフェライト相とフレッシュマルテンサイト相と焼戻しマルテンサイト相とのうち1種以上からなる硬質組織の合計が体積分率で3%以上、残留オーステナイト相が体積分率で0%~8%、パーライト相と粗大セメンタイト相との合計が体積分率で0%~8%であり、溶融亜鉛めっき層と前記母材鋼板との界面に、平均厚さが0.1μm~2.0μmであり、鋼板幅方向における最大厚さと最小厚さとの差が0.5μm以内であるFe-Al合金層を有し、前記Fe-Al合金層に直接接する微細化層において、鋼板幅方向における前記微細化層の最大厚さと最小厚さとの差が2.0μm以内である。
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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)