Different industries and fields have different performance requirements for aluminum plate. In machining and other industries, the hardness requirements for aluminum plate are particularly strict, which requires hardening treatment in the production process of aluminum plate to improve the hardness of aluminum plate and meet the performance requirements. At present, there are two mainstream processing methods, namely processing strengthening and solid solution strengthening
Processing strengthened aluminum plate
Work hardening, also known as cold work hardening, is the cold deformation of aluminum plate below the recrystallization temperature, such as forging, calendering, drawing, stretching, etc. during cold deformation, the dislocation density in aluminum plate increases, and entangles with each other to form cellular structure, which hinders the dislocation movement.
The larger the deformation degree is, the more serious the dislocation entanglement is, the greater the deformation resistance is, and the higher the strength is. The degree of strengthening after cold deformation varies with the deformation degree, deformation temperature and the properties of the material itself. When the same material is cold deformed at the same temperature, the greater the deformation, the higher the strength and the lower the plasticity.
Solution strengthened aluminum plate
It can not only form good solid solution with limited pressure or high plasticity, but also obtain good solid solution properties. Copper, magnesium, manganese, zinc, silicon, nickel and other elements are commonly used in solution strengthening of general aluminum plate.
In general, the alloying of aluminum plate forms limited solid solution, and the binary alloy forms limited solid solution, and all of them have higher limit solubility, which can play a greater solid solution strengthening effect.
After strengthening, the hardness performance of aluminum plate will be significantly improved, but its hardness can not be improved all the time; when it reaches the upper limit of hardness, no matter what method, it can not continue to improve the hardness of aluminum plate, only choose the brand with higher basic hardness.