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Annealing, normalizing and quenching in the processing of alu extrusion profile
Release time:
2022-03-17 16:08
Source:
We all know that alu extrusion profiles need to be heat treated during the processing. Because by changing the internal microstructure of the workpiece, or changing the chemical composition of the surface of the workpiece, the performance of the workpiece is given or improved. Next, I will explain the annealing, normalizing and quenching in the extrusion processing of aluminum profiles.
Annealing refers to heating the workpiece processed by alu extrusion profile to an appropriate temperature, using different holding times according to the material and the size of the workpiece, and then slowly cooling, the main purpose is to reduce the hardness of the material and improve the plasticity to facilitate subsequent processing, Reduce residual stress and improve the homogenization of structure and composition. Annealing is divided into recrystallization annealing, stress relief annealing spheroidizing annealing, and complete annealing according to different purposes.
Normalizing is to heat the alu extrusion profile processing workpiece to a suitable temperature and then cool it in the air. The effect of normalizing is similar to that of annealing, but the obtained structure is finer. It is often used to improve the cutting performance of the material, and sometimes it is also used for some Final heat treatment of less demanding parts.
Quenching is to heat and heat the alu extrusion profile, and then rapidly cool it in the quenching medium of water, oil or other inorganic salts and organic aqueous solutions. After quenching, the material has an unbalanced structure, which is usually very hard and brittle. It needs to be kept at a temperature higher than room temperature for a long time and then cooled. This process is called tempering (aging).
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Tel: 86-512-53640771
Fax: 86-512-53640769
E-mail：sales@alumag.com.cn(Domestic sales)
export@alumag.com.cn(Export)
Web:http://www.alumag.com.cn/
Address: No. 9, Xingang East Road, Liujiagang, Fuqiao Town, Taicang City, Jiangsu Province, China