concept

Hot rolling refers to the rolling above the recrystallization temperature of a metal.

Recrystallization is when annealing temperature is high enough, the time is long enough, the deformation of metal or alloy of fibrous tissue strainless new grain recrystallization (core), the new grains growing up continuously, until the original deformation organization completely disappeared, the performance of the metal or alloy also changed significantly, a process known as recrystallization, Among them, the temperature at which new grains begin to form is called the beginning recrystallization temperature, and the temperature at which the microstructure is completely occupied by new grains is called the final recrystallization temperature. Generally, the recrystallization temperature is the arithmetic average of the beginning and the final recrystallization temperature. The recrystallization temperature is mainly affected by alloy composition, deformation degree, original grain size, annealing temperature and other factors.

Above is the simple principle of theory of hot rolling, in our actual production of aluminum processing industry is the main embodiment of, when casting in reheating furnace heated to a certain temperature, which is above the recrystallization temperature, rolling, and that a temperature is based primarily on the aluminum alloy phase diagram, which is the most ideal situation, Heating temperature for the alloy indeed solidus in 80% of multivariate phase diagram on the basis of the temperature, which leads to different alloy phase diagram of multivariate problems, determination of heating temperature on the alloy on the basis of the 80% solid phase line, in the execution of system, based on the actual production situation, according to the equipment running status, modify the resulting more suitable for the alloy production.

The material: VW 50065 HR660Y760T-CP