Temperature change of industrial aluminum profiles during extrusion

Extrusion temperature of industrial aluminum profile is an important process parameter in extrusion production. In order to reduce the deformation resistance of metal and reduce extrusion pressure, it is necessary to increase the extrusion temperature of industrial aluminum profile. However, when the extrusion temperature is raised to a certain temperature, it is easy to appear hot brittleness phenomenon, resulting in cracks and other defects. To avoid this phenomenon, in order to improve the extrusion speed, it is necessary to reduce the extrusion temperature. These two conditions are contradictory, in order to reduce the deformation resistance, but also to use a larger extrusion speed, must choose a metal plasticity good temperature range.

However, in the production process of industrial aluminum extrusion, the metal and the extrusion cylinder liner, the mold, the gasket produce friction, and the metal itself produces deformation, which will increase the temperature of the metal, and often break through the pre-selected extrusion temperature range. The experiment shows that the extrusion temperature increases gradually in the whole extrusion process, and the extrusion speed increases gradually with the reduction of ingot metal. Therefore, the end of industrial aluminum profile products often produce cracks due to the increase of extrusion temperature and extrusion speed. The rise of extrusion temperature in the extrusion process is related to the nature of industrial aluminum profiles and extrusion conditions. For industrial aluminum profiles, the temperature difference between the metal before and after the mold exit is between 10-60 ° C.