C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
204/19
C21D 8/12 (2006.01) C21D 9/46 (2006.01) C23C 18/38 (2006.01) C25F 1/00 (2006.01) C25F 1/06 (2006.01) H01F 1/147 (2006.01) H01F 27/245 (2006.01) H01F 41/00 (2006.01)
Patent
CA 2036647
The production of grain oriented silicon steel sheets comprises a combination of hot rolling step, cold rolling step, decarburization and primary recrystallization annealing step, annealing separator applying step and secondary recrystallization annealing and purification annealing step. In this case, the cold rolled sheet is subjected to an electrolytic degreasing in a silicate bath containing an iron concentration of 50-5000 mg/~ and Cu is adhered to the surface(s) of the sheet after the decarburization and primary recrystallization annealing in an amount of 400-2000 mg/m2 per one-side surface.
La production de feuilles d'acier au silicium à grain orienté comprend une combinaison des étapes suivantes : laminage à chaud, laminage à froid, décarburation et recuit primaire de recristallisation, traitement de séparation par recuit, recuit secondaire de recristallisation et recuit de purification. Dans ce cas, la feuille laminée à froid est soumise à un dégraissage électrolytique dans un bain de silicate contenant une concentration de fer de 50-5 000mg/L, et du Cu est lié aux surfaces de la feuille après la décarburation et le recuit primaire de recristallisation, en quantités allant de 400 à 2 000 mg/m2 par face.
Hayakawa Yasuyuki
Kan Takahiro
Komatsubara Michiro
Kurosawa Mitsumasa
Sadayori Toshio
Kawasaki Steel Corporation
Smart & Biggar
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