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1. WO2016139876 - HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME

Publication Number WO/2016/139876
Publication Date 09.09.2016
International Application No. PCT/JP2016/000156
International Filing Date 14.01.2016
IPC
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
C21D 9/46 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
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
46for sheet metals
C22C 38/14 2006.01
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 38/60 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
C23C 2/06 2006.01
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
C23C 2/28 2006.01
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
26After-treatment
28Thermal after-treatment, e.g. treatment in oil bath
CPC
C21D 1/18
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
1General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
18Hardening
C21D 2211/008
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
2211Microstructure comprising significant phases
008Martensite
C21D 6/005
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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
6Heat treatment of ferrous alloys
005containing Mn
C21D 6/008
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
6Heat treatment of ferrous alloys
008containing Si
C21D 8/0205
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
02during manufacturing of plates or strips
0205of ferrous alloys
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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
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
Applicants
  • JFEスチール株式会社 JFE STEEL CORPORATION [JP]/[JP]
Inventors
  • ▲高▼坂 典晃 KOHSAKA, Noriaki
  • 船川 義正 FUNAKAWA, Yoshimasa
  • 櫻井 理孝 SAKURAI, Michitaka
  • 鈴木 克一 SUZUKI, Yoshikazu
Agents
  • 熊坂 晃 KUMASAKA, Akira
Priority Data
2015-04122003.03.2015JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
(FR) TÔLE D'ACIER À HAUTE RÉSISTANCE ET SON PROCÉDÉ DE PRODUCTION
(JA) 高強度鋼板及びその製造方法
Abstract
(EN)
Provided is a high-strength steel sheet having: an element composition that includes, in mass%, C: 0.09-0.17% of C, Si: 0.6-1.7% of Si, 3.5% or less of Mn, 0.03% or less of P, 0.005% or less of S, 0.08% or less of Al, 0.006% or less of N, 0.05% or less of Ti, and 0.0002-0.0030% of B, the balance being Fe and unavoidable impurities; and a steel sheet structure that includes, in area percentage, less than 20% (including 0%) of a ferrite phase, 75% or more (including 100%) of a tempered martensite phase, 10% or less (including 0%) of a non-tempered martensite phase, and less than 5% (including 0%) of a residual austenite phase, the Vickers hardness of the tempered martensite phase being 280-340, and the tensile strength of the sheet being 950-1,120 MPa.
(FR)
L'invention concerne une tôle d'acier à haute résistance ayant, en % en masse, la composition d'éléments suivante : de 0,09 à 0,17 % de C ; de 0,6 à 1,7 % de Si ; 3,5 % ou moins de Mn ; 0,03 % ou moins de P ; 0,005 % ou moins de S ; 0,08 % ou moins de Al ; 0,006 % ou moins de N ; 0,05 % ou moins de Ti ; et de 0,0002 à 0,0030 % de B, le reste étant du Fe et les inévitables impuretés. L'invention concerne également une structure de tôle d'acier qui comprend, en pourcentage surfacique : moins de 20 % (0 % compris) de phase de ferrite ; 75 % ou plus (100 % compris) de phase de martensite revenue ; 10 % ou moins (0 % compris) de phase de martensite non revenue ; et moins de 5 % (0 % compris) de phase d'austénite résiduelle. La dureté Vickers de la phase de martensite revenue est comprise entre 280 et 340. La résistance à la traction de la tôle est comprise entre 950 et 1120 MPa.
(JA)
 質量%で、C:0.09%以上0.17%以下、Si:0.6%以上1.7%以下、Mn:3.5%以下、P:0.03%以下、S:0.005%以下、Al:0.08%以下、N:0.006%以下、Ti:0.05%以下、B:0.0002%以上0.0030%以下を含有し、残部がFeおよび不可避的不純物からなる成分組成を有し、面積率で、フェライト相20%未満(0%を含む)、焼き戻しマルテンサイト相75%以上(100%を含む)、焼き戻されていないマルテンサイト相10%以下(0%を含む)、残留オーステナイト相5%未満(0%を含む)を含む鋼板組織を有し、前記焼き戻しマルテンサイト相のビッカース硬さが280以上340以下であり、引張強さが950MPa以上1120MPa以下である高強度鋼板。
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