Different industries and fields have different requirements for the properties of aluminum plates. In industries such as machining, the hardness of aluminum plates is especially strict, which requires hardening treatment in the process of aluminum plate production in order to improve the hardness of aluminum plates Meet performance requirements. At present, there are two main processing methods, one is processing strengthening, the other is solid solution strengthening
Wrought aluminium sheet
Processing strengthening is also called cold working hardening, which is the cold deformation processing of aluminum sheet below recrystallization temperature, such as forging, rolling, drawing, drawing, etc. . When cold deformation occurs, the dislocation density in aluminum sheet increases, and each other entangles and forms a cellular structure Retarding dislocation movement. The bigger the deformation degree, the more serious the dislocation entanglement, the greater the deformation resistance, the higher the strength. The degree of strengthening after cold deformation varies with the degree of deformation, deformation temperature and the nature of the material itself. When the same material is cold deformed at the same temperature, the greater the deformation degree, the higher the strength and the lower the plasticity.
Solution strengthened aluminium plate
Adding some alloy elements into pure aluminum to form infinite solid solution or limited solid solution can not only obtain high strength, but also obtain excellent plasticity and good pressure processing properties. Copper, magnesium, manganese, zinc, silicon and nickel are the most commonly used alloying elements in general solution strengthening of aluminum plate. Generally, Al-Cu, Al-Mg, Al-Zn, Al-Si, Al-Mn binary alloys are formed into a limited solid solution during the alloying process.
The hardness of the strengthened aluminum sheet can be improved obviously, but the hardness can not be improved all the time; when the hardness limit is reached, no matter what method is used, the hardness of the aluminum sheet can not be improved continuously You can only choose the brand with higher base hardness.