The key production processes of aluminum alloy profiles

1. Casting and melting: Raw material ratio → Melting → Casting ingot (to avoid component segregation).
2. Extrusion:
- Mold design: Affects the accuracy of profile cross-section and surface quality.
- Temperature control: Heating the extrusion barrel to 400-500℃.
3. Heat treatment:
- T5: Air cooling quenching after extrusion + artificial aging.
- T6: Solution treatment (water quenching) + complete aging, with higher strength.
4. Surface treatment:
- Anodic oxide film thickness ≥ 10μm (standard for architectural profiles).
- Powder spraying thickness 40-120μm, requires passing through salt spray test (more than 3000 hours).