ABSTRACT
After reheating a slab to the desired temperature, the slab is subjected to rolling. A rolling cycle in a typical hot strip mill includes the following main steps:
Descaling the slab prior to flat rolling by using a high-pressure water descaling system and in some cases, in combination with edging.
Rough rolling the slab to a transfer bar thickness that varies from 19 to 40 mm (0.75 to 1.57 in.). Rough rolling is usually accompanied by edging and interpass descaling.
Deliver the transfer bar from the roughing mill to the flying shear which is installed ahead of the finishing mill to cut both head and tail ends of the transfer bar.
Descaling the transfer bar prior to entering the finishing mill.
Finish rolling the transfer bar to the desired thickness with the possible use of interstand descaling and/or strip cooling.
Air and water cooling of the rolled product on the runout table.
Coiling of the rolled product.
