C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/00 (2006.01) B22D 11/00 (2006.01) B22D 11/10 (2006.01) C21C 7/00 (2006.01) C21C 7/06 (2006.01) C22C 38/02 (2006.01) C22C 38/04 (2006.01) C22C 38/54 (2006.01)
Patent
CA 2300992
The steel wire rod contains oxides which comprises, on the weight % basis, SiO2, 70% or more; CaO + Al2O3, less than 20%; and ZrO2, 0.1 to 10% in the average composition of oxides of 2 µm or more in width on a longitudinal section in the longer direction thereof. This wire rod is excellent in cold workability such as drawability, and steel wires which have high fatigue strength can be produced from this wire rod as stock steel.
L'invention concerne une tige en fil d'acier dans laquelle la composition moyenne d'un oxyde ayant pas moins de 2 mu m de largeur dans une section longitudinale comprend pas moins de 70 % en poids de SiO2, moins de 20 % en poids de CaO-Al2O3 et entre 0,1 et 10 % en poids de ZrO2, ladite tige possédant une excellente malléabilité à froid, par exemple pendant l'étirage. L'invention concerne également un fil d'acier obtenu grâce à l'utilisation de la tige d'acier en tant que matière de base possédant une résistance élevée à la fatigue.
Hamada Takanari
Ishizaka Yukio
Nakano Yusuke
Nishi Takayuki
Gowling Lafleur Henderson Llp
Sumitomo Metal Industries Ltd.
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