Deformation control method in heat treatment of large aluminum parts

The production process of large aluminum parts itself is relatively difficult, so in its actual production process, if it is deformed due to heat treatment, it will have a crucial impact on subsequent processes, and many products are scrapped because of this.

Therefore, in order to reduce and control the deformation of large aluminum parts caused by heat treatment, it can be achieved by optimizing the heat treatment process parameters and increasing the isothermal stage. At the same time, we also fully understand the importance of controlling the casting temperature in order to reduce the heat treatment deformation by controlling the heating rate, the temperature of the furnace, and increasing the quenching water temperature.

When aluminum parts are heated and heated, there are the characteristics that the surface heats up fast and the heart heats up slowly. There is a temperature difference between the surface and the heart, that is, there is thermal stress. And the faster the heating speed, the greater the wall thickness of the part, the greater the temperature difference, and the greater the thermal stress generated.

When aluminum parts are quenched and cooled by solution treatment, the faster the cooling rate, the greater the thermal stress generated, and the greater the part deformation. Therefore, it is necessary to reduce the cooling rate under the premise that the second phase is not precipitated during the cooling process, so that it is possible to effectively reduce the deformation of the part.

When aluminum parts are subjected to solution treatment, water is usually used as a cooling medium, and the cooling capacity of water is greatly affected by its temperature. Therefore, it is suggested that you can use a different cooling medium to reduce the influence of temperature on it and maintain stability.