Appeal No. 1997-0375
Application No. 08/287,473
This is an appeal from the final rejection of claims 1-6,
all the claims in the present application. Claim 1 is
illustrative:
1. A method of producing a high-strength steel sheet
having excellent workability used for can making comprising:
hot rolling a slab at a temperature within the range of
about the Ar transformation temperature to about 950EC to
3
provide a rolled steel strip;
coiling the rolled steel strip at a temperature range of
about 400EC to 600EC to provide a hot-rolled steel strip;
pickling and cold rolling the hot-rolled steel strip to
provide a cold-rolled steel strip;
continuously annealing the cold-rolled steel strip at a
temperature higher than its recrystallization temperature;
and then temper rolling the annealed cold-rolled steel
strip at a reduction of about 5% or more;
wherein said slab comprises:
C: about 0.0005 to 0.01 wt%,
N: about 0.001 to 0.04 wt%,
the total amount of C and N being about 0.008 wt% or more
and at least a majority of the components C and N being
present as a solid solution,
Mn: about 0.05 wt% to 2.0 wt%,
Al: about 0.005 wt% or less,
O: about 0.01 wt% or less, and
the balance consisting of Fe and impurities.
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