Rolling mill is the main machine of direct rolling metal. It uses rotating roll to roll billets to produce plastic deformation of metal according to the specified requirements. Rolling is a metal forming method with high productivity and low cost, which is suitable for rolling strip or plate material with the same cross section or periodic changes. Special rolling mills can roll machine parts or their blanks as well Ker ima določeni nemetalni materiali . valjanje v glavnem dva načina vročega valjanja in hladnega valjanja, ponavadi postopek valjanja s temperaturo valjanja nad temperaturo rekristalizacije kovine se imenuje vroče valjanje, postopek valjanja pod temperaturo rekristalizacije kovine pa se imenuje hladno valjanje., ta prispevek uvede vroče valjanje .
Hot rolling is carried out at a higher temperature to reduce the rolling pressure, which can greatly reduce the cross-sectional area of the workpiece, suitable for billet opening, cold rolling operating temperature is low, the product surface quality is good, the dimensional accuracy is high, the thickness is uniform, and can improve the mechanical properties of the rolled parts, but the equipment strength and precision are required, and the energy consumption is large.
Hot rolling is based on slab (mainly continuous casting billet) as raw material. After heating, strip steel is made by roughing mill and finishing mill. The hot steel strip from the finishing mill is cooled to the set temperature by laminar flow, and then rolled into steel strip coil by coiler. After different finishing lines (leveling, straightening, CrossCutting ali rezanje, pregled, tehtanje, pakiranje in označevanje itd.
