Metal treatment – Stock – Ferrous
Patent
1995-02-15
1996-12-24
Yee, Deborah
Metal treatment
Stock
Ferrous
148603, 148634, 148651, 148661, C22C 3806, C21D 800
Patent
active
055870279
ABSTRACT:
A method for manufacturing a canning steel sheet with non-aging property and superior workability uses, as a starting material, an ultra-low-carbon steel slab composed of from 0.0015% to 0.0100% by weight C, up to 0.20% by weight Si, from 0.10% to 1.20% by weight Mn, from 0.02% to 0.10% by weight Al, from 0.005% to 0.040% by weight P, up to 0.015% by weight S, up to 0.005% by weight N, and balance iron and unavoidable impurities. The manufacturing method includes hot rolling the steel, cold rolling the steel at a reduction ratio not less than 70% after pickling, and recrystallization annealing the steel by using a continuous annealing furnace in an atmosphere having a hydrogen content not less than 3% and a dew point not lower than -20.degree. C. at a temperature not lower than 730.degree. C. so that the content of remained C in the steel is kept less than 0.0015% by weight. At least one element selected from Nb, Ti and B may be added in predetermined amounts to the above composition. The steel sheet suitable for canning is efficiently manufactured by a continuous annealing process.
Fujinaga Chikako
Kato Toshiyuki
Kuguminato Hideo
Sato Kaku
Tosaka Akio
Kawasaki Steel Corporation
Yee Deborah
LandOfFree
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