Some Matters Needing Attention When Extruding 6082 Aluminum Alloy Profiles
ã€China Aluminum Industry Network】 (1) The heating method for aluminum alloy cast rods typically uses industrial frequency induction heating. This technique offers several advantages:
a. It heats quickly, reaching approximately 500°C in just 3 minutes;
b. It allows for precise control of the extrusion temperature, with an error margin of no more than ±3°C.
If the cast rod is heated too slowly, it may lead to the precipitation of Mg2Si phases, which can negatively impact the alloy's strengthening effect.
(2) When extruding aluminum profiles, certain factors were adjusted and the extrusion process for 6082 alloy was carefully optimized.
1. Due to the high deformation resistance of 6082 alloy, the cast rod temperature should be set toward the upper limit, between 480°C and 500°C;
2. The temperature of the extrusion die should also be kept relatively high;
3. To prevent defects such as shrinkage, bubbles, oxide scale, or impurities, the pressure should be maintained for a longer period during the extrusion process;
4. In order to ensure that the main strengthening phase, Mg2Si, fully dissolves into the matrix, the quenching temperature must be above 500°C. The extrusion outlet temperature should be controlled within the range of 500°C to 530°C;
5. 6082 aluminum alloy is highly sensitive to quenching. The presence of manganese promotes the formation of intermetallic compounds within the grain structure, which can adversely affect the quenching performance. Therefore, a high cooling intensity and fast cooling rate are essential. Water quenching is required to rapidly lower the temperature below 50°C;
6. After cutting the 6082 aluminum alloy sections, the mounting frames should be spaced appropriately and not packed too densely to avoid damage or deformation.
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