C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/12 (2006.01)
Patent
CA 2050976
A method of manufacturing an oriented silicon steel sheet improved in magnetic characteristics, in which a hot-rolled steel sheet of oriented silicon steel containing about 0.01 to 0.10 % by weight of Al and about 0.01 to 0.04 % by weight of Sb as inhibitor components is heat-treated and cold-rolled one time or two or more times to have a final thickness. In the final heat treatment and final cold rolling alone, the steel sheet is quenched from a temperature of about 900 to 1,100°C to a temperature equal to or lower than about 50°C, is heat-treated at about 50 to 150°C for about 30 sec. to 30 min. while applying a tensile stress of about 0.5 to 20 kg/mm2, is thereafter cold-rolled by a reduction rate of about 35 to 70 % in a tandem rolling method, is aged at about 200 to 400°C for about 10 sec. to 10 min., and is finished by cold rolling to have the final thickness.
Iwamoto Katsuo
Kan Takahiro
Komatsubara Michiro
Kurosawa Mitsumasa
Sadayori Toshio
Kawasaki Steel Corporation
Smart & Biggar
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