C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/14 (2006.01) B21B 1/26 (2006.01) B21B 3/00 (2006.01) C21D 8/02 (2006.01) C22C 38/04 (2006.01) C22C 38/12 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01) C22C 38/48 (2006.01) C22C 38/50 (2006.01) C22C 38/54 (2006.01) C22C 38/58 (2006.01) C23C 2/40 (2006.01)
Patent
CA 2668987
A steel plate exhibiting a high Young's modulus in the direction of rolling as determined by the static tensile method, which has a composition substantially containing by mass C: 0.005 to 0.200%, Si: 2.50% or below, Mn: 0.10 to 3.00%, N: 0.0100% or below, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship: Ti-48/14~N>0.0005 and in which at 1/6 of theplate thickness, the sum of the X-ray random intensity ratios of {100}<001> and {110}<001> orientations is 5 or below and the sum of the maximum value of the X-ray random intensity ratios of a group of {110}<111> to {110}<112> orientations and the X-ray random intensity ratio of {211}<111> orientation is 5 or above; and a process for the production of the steel plate.
L'invention concerne une plaque en acier présentant un module de Young élevé en direction de laminage tel que déterminé grâce à la méthode de traction statique. La plaque présente une composition contenant essentiellement, en masse, C : 0,005 à 0,200 %, Si : 2,50 % ou moins, Mn : 0,10 à 3,00 %, N : 0,0100 % ou moins, Nb : 0,005 à 0,100 %, et Ti :0,002 à 0,150 % et satisfait au rapport : Ti-48/14xN.apprxeq.0,0005. Pour 1/6 d'épaisseur de plaque, la somme des rapports d'intensité aléatoire de rayons X de {100} et {110} orientations est de 5 ou moins, et la somme de la valeur maximale des rapports d'intensité aléatoire de rayons X d'un groupe de {110} à {110} orientations et du rapport d'intensité aléatoire de rayons X de {211} orientations est de 5 ou plus. L'invention concerne également un procédé de production de la plaque en acier.
Hanya Koji
Maruyama Naoki
Nakamura Yohji
Sugiura Natsuko
Takahashi Manabu
Goudreau Gage Dubuc
Nippon Steel Corporation
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