DELIVERY METHOD OF HOT-ROLLED COIL AND METHOD AND APPARATUS FOR PICKLING HOT-ROLLED STEEL STRIP

摘要

PROBLEM TO BE SOLVED: To provide a delivery method of a hot-rolled coil preventing the occurrence of fluting when delivering a hot-rolled steel strip from a hot-rolled coil of a pay-off reel, and to provide a pickling method and a pickling apparatus achieving the inexpensive and highly efficient descaling in a pickling line for performing the descaling of the hot-rolled steel strip by using the delivery method while maintaining the excellent surface quality.;SOLUTION: The temperature of a mandrel of the pay-off reel is raised, a hot-rolled coil mounted on the pay-off reel is heated from its inside diameter part side to deliver the hot-rolled steel strip at the temperature of ≥250°C over the entire length of the hot-rolled steel strip of the coil. Further, in the pickling, the hot-rolled steel strip delivered at a temperature of ≥250°C over the entire length of the hot-rolled steel strip is fed to a pickling tank, and subjected to the pickling treatment. The mandrel of the pay-off reel of the pickling apparatus has a heating means.;COPYRIGHT: (C)2010,JPO&INPIT