Aluminum alloys are classified into materials that can be hardened by heat treatment and materials that can be hardened only by plastic working according to their components. In order to obtain the desired mechanical strength, we propose T7, T6, T5, T4, T2 treatment plans according to the material to serve you.

Aluminum alloy heat treatment technology is to select a certain heat treatment specification, control the heating rate to rise to a corresponding temperature and keep it for a certain period of time to cool at a certain rate during heat treatment of aluminum alloy products, so as to change the structure of the alloy.

Age hardening of aluminum alloys is a rather complicated process, which not only depends on the composition and aging process of the alloy, but also on the defects caused by the alloy in the production process, especially the number and distribution of vacancies and dislocations. It is generally believed that age hardening is the result of the segregation of solute atoms to form a hardened zone.

When the aluminum alloy is quenched and heated, vacancies are formed in the alloy. During quenching, due to the fast cooling, these vacancies are "fixed" in the crystal before they can be removed in time. These vacancies in supersaturated solid solutions are mostly bound to solute atoms. Since the supersaturated solid solution is in an unstable state, it must transition to an equilibrium state. The existence of vacancies accelerates the diffusion rate of solute atoms, thereby accelerating the segregation of solute atoms.

The size and number of hardened zones depend on the quenching temperature and the quenching cooling rate. The higher the quenching temperature, the greater the vacancy concentration, the greater the number of hardened zones, and the smaller the size of the hardened zones. The greater the quenching cooling rate, the more vacancies are fixed in the solid solution, which is beneficial to increase the number of hardened zones and reduce the size of the hardened zones.

An essential feature of the precipitation hardening alloy system is the equilibrium solid solubility that varies with temperature, that is, the solid solubility increases with increasing temperature, and most heat-treatable aluminum alloys meet this condition.