Patent ID: 11965222
Assignee: JFE STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 3:
4. A method for producing a cold-rolled full hard steel sheet, the method comprising pickling a hot-rolled steel sheet obtained in the method according to claim 2; and performing cold-rolling at a rolling reduction of 55% or more, wherein, when a rolling reduction in a final pass of cold rolling is assumed to be RF and rolling reductions one stand, two stands, and three stands before the final pass are respectively assumed to be RF−1, and RF−2, and RF−3, the rolling reductions RF−1, and RF−2, and RF−3, are each set to 10% or more and 35% or less, a difference (|RF−1−RF−2|) between the rolling reduction one stand before the final pass and the rolling reduction two stands before the final pass is set to 10% or less, and a difference (|RF−2−RF−3|) between the rolling reduction two stands before the final pass and the rolling reduction three stands before the final pass is set to 10% or less.