When processing the aluminum alloy enclosure, the influence of the ambient temperature on the aluminum profile shell will change with the change of the extrusion conditions, because the extrusion temperature and extrusion speed in the extrusion process are constantly changing. When extruding the aluminum profile shell, the extrusion temperature is low, the extrusion speed is very slow, and the heat conduction of the aluminum alloy enclosure is very high, then, what harm does the low temperature have on the aluminum profile shell? What are the specific manifestations?
First, the structure has changed.
Generally, when the aluminum alloy enclosure is cold, its material structure will change, which will cause the material to change its quality and show performance anisotropy. It may lose its original characteristics or change. At this time, it can only reduce the chance of abnormality. , To lead it in a development direction that is beneficial to oneself.
Second, affect the physical and chemical properties.
1. Low temperature will cause damage to the chemical structure of the aluminum alloy enclosure, which will cause a chemical reaction to corrode the aluminum shell.
2. Destroy the physical structure of the aluminum shell. Processing them for a long time at low temperatures will cause the density to change and small damage will occur.
3. The intercrystalline material is destroyed, which leads to the disorder of the crystal grain order.
Third, lead to processing embrittlement.
A change in the aluminum alloy enclosure will cause damage to the crystal, a change in the crystal lattice, and a sharp decline in its own plasticity index, which will make the aluminum profile shell very fragile, brittle in use, and easy to deform.
Temperature has a great influence on the surface quality of extruded profiles, so the temperature of each process needs to be strictly controlled, and the places that need to be controlled are: the temperature during extrusion, the rising temperature caused by friction during extrusion, and the temperature of the mold. , The temperature of the aluminum rod and the temperature of the heat treatment. Find out the appropriate production process to ensure product quality assurance.
