Hot rolling is that aluminium ingot cast into slab which thick is 300-500 mm, then roll above the recrystallization temperature, after heating, then roll in the hot rolling equipment into various thickness rolling products, then they need to finish. Secondly many materials need high corrosion resistance, fatigue resistance, high plasticity, etc. This needs to be hot rolled plate. Hot roll refers to process and organize through 90% hot deformation, during the large plastic deformation process, the internal organization has experienced many times to restore, recrystallization, crush the rough casting state grain, make microscopic fracture healing, make the uniformity the billet in the internal organization ,the grain ‘s size and shape, casting defects and line defect concentration changes, have got significant improvement, make the as-cast organization to trans form deformed microstructure, which greatly improve the performance of the processing of metal. Especially in the case of deep drawing performance, hot roll take advantages of the cast rolling.

The advantages of the hot rolling

Hot roll cogging can weld the part of the ingot casting defects such as loose, porosity and micro cracks together, which will not cause subsequent processing internal organization defects; The grain of the strip are close, various properties are even. Hot rolled aluminum plate surface quality is good, they have strong mechanical properties and ductility at the same time, oxidation effect is good.

The classification of hot roll

1, hot rolled plate,: the thickness of aluminium and aluminium alloy plate is not less than 7.0mm, the main varieties :hot rolled plate, annealing strip, quenching and quenching pre-stretching plate, etc. Hot rolled thick plates usually adopt block slice method to produce in the hot rolling mill, the traditional technological process : ingot homogenizing, milling surface, heating, hot rolling – scale shear – straightening.

Hot-rolled coil: thickness of aluminium and aluminium alloy plate and strip is less than 7.0mm often adopt the way of hot-rolled coil, products are mainly used for cold rolled billet, they are also used to product sheets, Modern production process : ingot milling surface heating – >soaking heat integration – hot roughing – hot even milk – baling weighing

At present, the haomei aluminum has become the leading enterprises of hot roll.