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1. (WO2001000894) 590MPa CLASS VERY THICK H-STEEL EXCELLENT IN TOUGHNESS AND PRODUCTION METHOD THEREOF
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/000894 International Application No.: PCT/JP1999/003378
Publication Date: 04.01.2001 International Filing Date: 24.06.1999
IPC:
B21B 1/08 (2006.01) ,B21B 3/02 (2006.01) ,C21D 8/00 (2006.01) ,C21D 9/00 (2006.01) ,C22C 38/00 (2006.01) ,C22C 38/04 (2006.01) ,C22C 38/08 (2006.01) ,C22C 38/16 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B
ROLLING OF METAL
1
Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
08
for rolling work of special cross-section, e.g. angle steel
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B
ROLLING OF METAL
3
Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
02
Rolling special iron 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
8
Modifying the physical properties by deformation combined with, or followed by, heat treatment
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
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
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
04
containing manganese
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
08
containing nickel
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
16
containing copper
Applicants:
KIMURA, Tatsumi [JP/JP]; JP (UsOnly)
KAWABATA, Fumimaru [JP/JP]; JP (UsOnly)
AMANO, Keniti [JP/JP]; JP (UsOnly)
KAWASAKI STEEL CORPORATION [JP/JP]; 1-28, Kitahonmachi-dori 1-chome Chuo-ku Kobe-shi Hyogo 651-0075, JP (CA, CN, LU)
Inventors:
KIMURA, Tatsumi; JP
KAWABATA, Fumimaru; JP
AMANO, Keniti; JP
Agent:
OCHIAI, Kenichiro; Tokyo Head Office, Kawasaki Steel Corporation Hibiya Kokusai Building 2-3, Uchisaiwaicho 2-chome Chiyoda-ku Tokyo 100-0011, JP
Priority Data:
Title (EN) 590MPa CLASS VERY THICK H-STEEL EXCELLENT IN TOUGHNESS AND PRODUCTION METHOD THEREOF
(FR) ACIER H TRES EPAIS DE CLASSE 590MPA A TENACITE AMELIOREE ET SON PROCEDE DE PRODUCTION
Abstract:
(EN) An H-steel used for a building structure such as a column material in a high-rise and super high-rise building structure. Specifically, a 590MPa class very thick H-steel excellent in flange-thickness-direction toughness as rolled, wherein more diffusive $g(a)q is finely dispersed into $g(a)B in a very low carbon steel bainite structure with Mn and Cu compositions adjusted to within proper ranges to greatly improve a flange-depth-direction toughness with a 590MPa class tensile strength ensured, the H-steel characterized by containing 0.001 to 0.025 wt.% of C, not more than 0.6 wt.% of Si, 0.4 to 1.6 wt.% Mn, not more than 0.025 wt.% of P, not more than 0.010 wt.% of S, not more than 0.1 wt.% of Al, 0.6 to 2.0 wt.% of Cu, 0.25 to 2.0 wt.% of Ni, 0.001 to 0.050 wt.% of Ti and 0.0002 to 0.0030 wt.% of B and by satisfying the relations, Mn/Cu$m(F)2.0 and 250$m(F)117Mn(wt.%)163Cu(wt.%)$m(F)350.
(FR) L'invention concerne un acier H utilisé dans une construction, par exemple une colonne faisant partie d'une construction à grande hauteur ou à très grande hauteur. Cette invention concerne plus particulièrement un acier H très épais de classe 590Mpa qui présente, une fois laminé, une excellente ténacité dans le sens de l'épaisseur de la semelle. Dans cet acier, $g(a)q se diffuse sous une forme finement dispersée dans $g(a)B à l'intérieur d'une structure en acier bainite à très faible teneur en carbone, laquelle renferme des compositions de Mn et de Cu présentes dans des proportions appropriées, ce qui permet d'améliorer considérablement la ténacité dans le sens de l'épaisseur de la semelle et d'assurer une résistance à la traction de classe 590MPa. De plus, l'acier H de cette invention renferme 0,001 à 0,025 % en poids de C, pas plus de 0,6 % en poids de Si, 0,4 à 1,6 % en poids de Mn, pas plus de 0,025 % en poids de P, pas plus de 0,010 % en poids de S, pas plus de 0,1 % en poids de Al, 0,6 à 2,0 % en poids de Cu, 0,25 à 2,0 % en poids de Ni, 0,001 à 0,050 % en poids de Ti, et enfin 0,0002 à 0,0030 % en poids de B, de manière à vérifier les relations suivantes: Mn/Cu$m(F)2,0 et 250$m(F)117Mn (en % en poids) +163Cu (en % en poids)$m(F)350.
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Designated States: CA, CN, LU, US
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)