1. The temperature of industrial aluminum profile is too low during extrusion, the extrusion speed is too slow, and the exit temperature of the profile at the extruder cannot reach the solid solution temperature, and the solid solution strengthening effect cannot be achieved;

Solution: Reasonably control the extrusion temperature and extrusion speed to keep the profile at the outlet temperature of the extruder above the lower solid solution temperature;

2. There are few fans at the outlet of industrial aluminum profiles and insufficient air volume, resulting in slow cooling speed, which cannot make the industrial aluminum profiles drop below 200°C in a short period of time, causing the coarse magnesium silicide to precipitate prematurely, thereby reducing the solid solution phase. , Affecting the mechanical properties of the profile after heat treatment;

Solution: Strengthen the air-cooling conditions, and install atomized cooling devices in factories where conditions permit, in order to achieve the lower requirements of the 6063 alloy cooling gradient;

3. The composition of the ingot is unqualified, and the content of magnesium and silicon in the ingot does not meet the standard requirements;

Solution: Strengthen the quality management of ingots;

4. The ingot is not homogenized, so that the magnesium silicide phase precipitated in the ingot structure cannot be re-solidified in a short time of extrusion, resulting in insufficient solid solution and affecting product performance;

Solution: homogenize the ingot;

5. Improper aging process, poor hot air circulation or incorrect installation position of thermocouple, resulting in insufficient aging or over-aging.

Solution: reasonably determine the aging process, correctly install the thermocouple, and correctly place the industrial aluminum profiles to ensure the smooth circulation of hot air.