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1. WO2014119261 - HIGH-STRENGTH HOT-ROLLED STEEL SHEET AND PRODUCTION METHOD THEREOF

Publication Number WO/2014/119261
Publication Date 07.08.2014
International Application No. PCT/JP2014/000337
International Filing Date 23.01.2014
IPC
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
C21D 9/46 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
C22C 38/14 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
14containing titanium or zirconium
C22C 38/54 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
54with boron
C23C 2/02 2006.1
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/06 2006.1
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
04characterised by the coating material
06Zinc or cadmium or alloys based thereon
CPC
C21D 2211/004
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
2211Microstructure comprising significant phases
004Dispersions; Precipitations
C21D 2211/005
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, e.g. BY DECARBURISATION OR TEMPERING
2211Microstructure comprising significant phases
005Ferrite
C21D 8/0226
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
02during manufacturing of plates or strips
0221characterised by the working steps
0226Hot rolling
C21D 9/46
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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
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 38/001
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
001containing N
Applicants
  • JFEスチール株式会社 JFE STEEL CORPORATION [JP]/[JP]
Inventors
  • 中島 勝己 NAKAJIMA, Katsumi
  • 山崎 和彦 YAMAZAKI, Kazuhiko
  • 上 力 KAMI, Chikara
Agents
  • 熊坂 晃 KUMASAKA, Akira
Priority Data
2013-01645731.01.2013JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) HIGH-STRENGTH HOT-ROLLED STEEL SHEET AND PRODUCTION METHOD THEREOF
(FR) TÔLE D'ACIER À HAUTE RÉSISTANCE LAMINÉE À CHAUD ET SON PROCÉDÉ DE PRODUCTION
(JA) 高強度熱延鋼板およびその製造方法
Abstract
(EN) A high-strength hot-rolled steel sheet with excellent burring workability, and a production method thereof are provided. This high-strength hot-rolled steel sheet with excellent burring workability has a composition which includes, in mass%, C: 0.06%-0.13%, Si: less than 0.5%, Mn: greater than 0.5% and less than or equal to 1.4%, P: 0.05% or less, S: 0.005% or less, N: 0.01% or less, Al: 0.1% or less, Ti: 0.05%-0.25% and V: greater than 0.15% and less than or equal to 0.4%, such that S, N, Ti and V satisfy Ti* + V ≧ 0.35 (here, Ti*=Ti-N×(48/14)-S×(48/32), and S, N, Ti and V represent the content (in mass%) of each element), with the remainder consisting of Fe and unavoidable impurities, and is of a material in which the ferrite phase fraction exceeds 90%, carbides containing Ti are precipitated, and 70% or more of said carbides have a particle diameter of less than 9nm.
(FR) Tôle d'acier à haute résistance laminée à chaud présentant une excellente aptitude au soyage, ainsi que son procédé de production. Cette tôle d'acier à haute résistance laminée à chaud qui possède une excellente aptitude au soyage, présente la composition suivante en % en masse : C : de 0,06 % à 0,13%, Si : moins de 0,5%, Mn : de plus de 0,5% à 1,4%, P : 0,05% ou moins, S : 0,005% ou moins, N : 0,01% ou moins, Al : 0,1% ou moins, et T : de 0,05% à 0,25%, et V : de plus de 0,15% à 0,4%, de telle manière que que S, N, Ti et V satisfont à la condition suivante : Ti * + V ≥ 0,35 (ici, Ti * = Ti-N×(48/14)-S×(48/32), S, N, Ti et V représentant la part (en % en masse) de chaque élément), le reste étant constitué de Fe et d'impuretés inévitables, et est formée d'un matériau dans lequel la fraction de la phase ferrite est supérieure à 90%, les carbures contenant du Ti sont précipités, et au moins 7 % desdits carbures ont un diamètre de particule inférieur à 9 nm.
(JA)  優れたバーリング加工性を備えた高強度熱延鋼板およびその製造方法を提供する。 質量%で、C:0.06%以上0.13%以下、Si:0.5%未満、Mn:0.5%超1.4%以下、P:0.05%以下、S:0.005%以下、N:0.01%以下、Al:0.1%以下、Ti:0.05%以上0.25%以下、V:0.15%超0.4%以下をS、N、TiおよびVがTi*+V≧0.35(但し、Ti*=Ti-N×(48/14)-S×(48/32)であり、S、N、Ti、Vは各元素の含有量(質量%))を満足するように含有し、残部がFeおよび不可避的不純物からなる組成と、フェライト相の分率が90%超であり、Tiを含む炭化物が析出し、該炭化物のうちの70%以上が粒径9nm未満である組織とすることで、バーリング加工性に優れた高強度熱延鋼板とする。
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