EN 
简体中文The heat treatment process of the screw barrel is one of the key steps to ensure its performance and durability. The process usually includes three main steps: quenching, tempering and normalizing. First, quenching is to heat the screw barrel to above the critical temperature, and then quickly immerse it in the quenching medium, such as water, oil or salt solution. This step results in rapid cooling of the surface, forming a hardened layer, which improves the hardness and wear resistance of the screw barrel.
Tempering is the treatment performed on the quenched screw barrel. By heating it to a lower temperature and then maintaining it for a certain period of time, its internal structure can be adjusted to reduce brittleness and improve toughness and strength. This conditioning treatment helps to adapt the screw barrel to the high-load working environment during the extrusion of recycled pellets.
Normalizing is used to further improve the performance of the screw barrel. By heating it to a lower temperature and maintaining it for an appropriate period of time, internal stress can be alleviated and the mechanical properties and processing properties of the material can be optimized. This step helps improve the stability and durability of the screw barrel and prolongs its service life.
The heat treatment process of the screw barrel is a key processing step. Through careful design and optimization, the screw barrel can be ensured to have the required hardness, toughness and wear resistance, thereby meeting the requirements of the recycled pellet extrusion process and improving production efficiency and products. quality.
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