Intermediate annealing and quenching of aluminum alloys

Intermediate annealing refers to annealing during the cold working deformation process.
The process system of intermediate annealing is basically the same as that of billet annealing.
The selection of annealing temperature is mainly determined by the composition of the aluminum alloy and the degree of deformation. The high-strength aluminum alloy with complex aluminum alloy composition is slowly cooled with the furnace after annealing and heat preservation . It is conducive to the separation of solid solution strengthening phase particles to improve the plasticity of the aluminum alloy.

The last annealing after
the finished aluminum sheet and aluminum coil reach the thickness of the finished product is the finished product annealing.
When annealing the finished product, the annealing process must be strictly controlled to ensure that the mechanical properties of the material meet the technical requirements.
According to the different mechanical property requirements, the finished product annealing is divided into complete recrystallization annealing and incomplete recrystallization annealing.

Quenching is the most important and strict heat treatment method in the production of aluminum alloy, aluminum sheet and aluminum coil.
The purpose of quenching is to obtain a supersaturated solid solution of the metal material to create the necessary conditions for subsequent aging strengthening.
Quenching is only applicable to aluminum alloy materials that can be heat-treated and strengthened. The quenching method is to heat the aluminum sheet and aluminum coil that have been rolled to the finished thickness in a quenching furnace or salt bath with relatively accurate temperature control. When the temperature of the aluminum alloy reaches the specified temperature range and is kept warm for a certain period of time, the aluminum sheet and aluminum coil are quickly immersed in room temperature water for rapid cooling. In this way, the structure of the aluminum alloy at high temperature can be fixed at room temperature, and a supersaturated solid solution that can be strengthened by aging can be obtained.