Extrusion process: aluminum rod heating (440-460°C),Aluminum for building mold heating (420-460°C, 3-6h) → extrusion (outlet temperature 530-570°C) → spray air cooling and quenching → ingot heating (410-420℃) Board self-inspection→(below 200℃)→stretch straightening (below 70℃, elongation rate≤1.5%)→cut-to-length sawing→basket installation (check)→ageing→hardness test→go Packaging (or oxidation, spraying).
Aluminum rod heating: For 6061 alloy,Aluminum for building Mg and Si must be heated to a temperature above 500°C to completely dissolve Mg and Si. The ingot is above 440°C before extrusion. The temperature rises due to the heat of extrusion deformation. The temperature of the metal when passing through the die hole The temperature reaches 530-570℃,Aluminum for building and reaches the state of solution treatment. Therefore, the aluminum rod must be heated to 440-460℃ before extrusion.
Mold heating: The temperature requirements when heating the mold before the machine is: flat mold 410-440°C,Aluminum for building split mold 430-460°C; mold heating time in the furnace is not allowed to exceed 10h, if the time is too long,Aluminum for building the mold hole working zone is prone to pitting corrosion .