Production method of ultra-thin steel sheet for hot-rolled steel sheet

摘要

PROBLEM TO BE SOLVED: To produce a hot rolled steel sheet for producing an extra-thin steel sheet for a can having uniform material and sheet thickness in the sheet width direction though it is extra-thin and wide. ;SOLUTION: A slab is subjected to rough rolling to form into a sheet bar, which is subjected to butt welding with a preceding sheet bar, the temp. of the width edge parts of the sheet bar is raised by an edge heater, next, in at least 3 stands, finish continuous rolling by pair cross roll rolling is executed, and a hot rolled steel strip of ≥950 mm sheet width, ≤2 mm sheet thickness and ±140 μm crown is obtd.;COPYRIGHT: (C)2001,JPO