Hot rolling is relative to cold rolling. Cold rolling is rolling below the recrystallization temperature, while hot rolling is rolling above the recrystallization temperature. To put it simply, a piece of steel billet is heated and rolled several times, then trimmed and straightened into a steel plate. This is called hot rolling. It can significantly reduce energy consumption and reduce costs. During hot rolling, the metal has high plasticity and low deformation resistance, which greatly reduces the energy consumption of metal deformation. Hot rolling can improve the processing performance of metals and alloys, that is, break the coarse grains in the casting state, significantly heal cracks, reduce or eliminate casting defects, transform the as-cast structure into a deformed structure, and improve the processing performance of the alloy.

Aluminum plate hot rolling process

Aluminum plate: The hot rolling process of the product includes the preparation process of rolling raw materials and the rolling process. The preparation process of rolling raw materials includes sawing of the head and tail of the ingot, side milling or planing, surface milling, etching and washing, welding or bundling of aluminum-clad plates or composite plates, and heating. The rolling process includes rough rolling and finish rolling. The rolling process is mainly a process of interaction between the roll, the rolled piece and the emulsion.

Hot rolling generally refers to rolling above the metal recrystallization temperature. During the hot rolling process, metal deformation involves both hardening and softening processes. Due to the influence of the deformation speed, as long as the recovery and recrystallization processes do not have time to proceed, the metal will undergo certain work hardening as the degree of deformation increases. However, within the hot rolling temperature range, the softening process plays a dominant role. Therefore, at the end of hot rolling, the recrystallization of the metal is often incomplete, and the aluminum alloy plates and strips of hot rolling mills exhibit recrystallization and deformation structures. organizational status.

Aluminum and aluminum alloy hot-rolled products are generally divided into two categories, one is hot-rolled coils, and the other is hot-rolled thick plates.

Hot-rolled thick plates refer to aluminum and aluminum alloy plates with a thickness of not less than 7.0. The main varieties include hot-rolled plates, annealed plates, quenched or quenched pre-stretched plates, etc. Hot-rolled thick plates are usually produced by the block method on hot rolling mills. The traditional process flow is: ingot homogenization-milling-heating-hot rolling-cutting to length-straightening. (Reference: pure aluminum plate)

Thickness less than 7丨0 Aluminum and aluminum alloy plates and strips are usually produced by hot-rolled coils. The products are mainly used as cold-rolled billets and also used for sheet production. Modern production The process flow is: ingot milling - heating (integrated soaking and heating) - hot rough rolling - hot rolling - bundling and weighing.

The above is an introduction to hot rolling and aluminum plate hot rolling processes. For more questions, please contact Changsheng Aluminum.