Patent ID: 11965224
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. A manufacturing method of a steel sheet for a can according to claim 1 that is formed by hot-rolling a steel piece containing, by mass %:
C: 0.010% to 0.050%;
Si: 0.020% or less;
Mn: 0.10% to 0.60%;
P: 0.020% or less;
S: 0.020% or less;
Al: 0.050% or less;
N: 0.0100% or less;
Nb: 0% to 0.03%;
Ti: 0% to 0.03%;
B: 0% to 0.0020%; and
a remainder including Fe and an impurity, then, coiling a hot-rolled sheet obtained by the hot rolling at a coiling temperature of 640° C. or lower, pickling and cold-rolling the hot-rolled sheet to obtain a cold-rolled sheet, then, annealing the cold-rolled sheet at 680° C. or higher, carrying out an overaging treatment on the annealed cold-rolled sheet, and then carrying out secondary cold rolling,
wherein the following formula (2) is satisfied,

300<3T10.7−(r1/r2)1.5+{(T2−720)2}/4+(T3 log t)/3<1000  (2)

in the formula (2), T1 is the coiling temperature (° C.) of the hot-rolled sheet, r1 is a first stand rolling reduction (%) of the secondary cold rolling, r2 is a second stand rolling reduction (%) of the secondary cold rolling, T2 is an annealing temperature (° C.), T3 is an overaging temperature (° C.), and t is an overaging time (seconds).