Hot-rolled sheet annealing facility for Si-containing hot-rolled steel sheet, hot-rolled sheet annealing method and descaling method

摘要

A hot-rolled sheet annealing facility having a heating zone, a soaking zone, and a cooling zone for performing hot-rolled sheet annealing on a Si-containing hot-rolled steel sheet, wherein a rapid heating device is installed upstream of the heating zone and/or upstream of the heating zone When performing hot-rolled sheet annealing on the Si-containing hot-rolled steel sheet using While providing a hot-rolled sheet annealing facility capable of performing descaling only by pickling without requiring scaling or heating of the steel sheet in the pickling process, the hot-rolled sheet annealing method and the descaling method using the above facility are proposed.