Cause of brittleness
The brittleness of aluminum coils is mainly due to the following reasons:
1. Excessive cooling: During the processing of aluminum coils, if the cooling rate is too fast during annealing, the internal structure of the aluminum coil will be easily affected, and "solidification damage" will easily occur, resulting in a decrease in the quality of the aluminum coil.
2. Excessive heat treatment: Excessive annealing or excessive temperature of aluminum coils can also cause the problem of brittleness of aluminum coils. Because heat treatment beyond a certain range will cause large grain boundary bacterial clusters to appear on the grain boundaries of the aluminum coil, causing brittle fracture of the aluminum coil.
3. Oxide scale: Aluminum coils may form oxide scale during processing. The oxide scale adheres to the aluminum coils, affecting the surface quality of the aluminum coils and causing the aluminum coils to easily crack or become brittle.
4. Excessive hardening: During the processing of aluminum coils, excessive hardening will make the hardness of the aluminum coil too high, but the toughness will be reduced, which can easily lead to brittleness.
Ways to prevent aluminum curls from becoming brittle
1. Control the cooling rate: Aluminum coils need to be cooled slowly during the annealing process to avoid solidification damage and increase the ductility and toughness of the aluminum coils.
2. Reasonable heat treatment conditions: The heat treatment of aluminum coils must control the treatment time and temperature to avoid excessively high processing temperature and excessive processing time.
3. Remove oxide scale: Before using the aluminum coil, the oxide scale on the surface should be removed to ensure the surface finish of the aluminum coil and prevent the occurrence of brittleness.
4. Control excessive hardening: During the processing of aluminum coils, the hardening should be moderate to prevent excessive hardening, which may lead to unstable quality.
To sum up, as a commonly used aluminum product, it is very common for aluminum coils to have brittleness problems during their production and use. By analyzing the process of aluminum coils and the causes of brittleness, we can take various measures to prevent brittleness, thereby ensuring the quality and safety of aluminum coils during use.
