Aluminum bars in different fields and different fields of aluminum bar performance provisions are not the same, in mechanical processing and other fields, the compressive strength of aluminum bars is particularly strict, which stipulates that in the production process of aluminum bars to carry out hardening treatment, in order to improve the compressive strength of aluminum bars, so as to achieve the performance requirements. At this stage, there are two mainstream production and processing methods, namely, production and processing strengthening and solution strengthening. The following two methods are briefly and in detail: production and processing strengthening aluminum bar.
Production and processing strengthening, also known as cold work hardening, is the cold deformation of aluminum bars at the following recrystallization temperature, such as forging, calendering, drawing, stretching, etc., when cold deformation, the internal dislocation density of aluminum bars increases, and they intertwine with each other and produce cellular structure, which hinders dislocation movement. The larger the deformation value, the more serious the dislocation entanglement, the greater the deformation resistance and the higher the compressive strength. The degree of hardening after cold deformation varies with deformation degree, deformation temperature and the properties of raw materials. When the same raw material is cold deformed at the same temperature, the higher the deformation value is, the higher the compressive strength is, and the lower the plasticity is.
By adding some alloying elements to pure aluminum to produce infinite solid solution or finite solid solution, not only high compressive strength, but also excellent plasticity and good performance of pressure production and processing can be obtained. Copper, magnesium, manganese, zinc, silicon, nickel and other elements are commonly used in solid solution strengthening of Shenyang aluminum bars. In general, aluminum rod alloying produces finite solid solutions, such as Al-Cu, Al-Mg, Al-Zn, Al-Si, Al-Mn and other binary alloys, which all have relatively large limit solubility and can have relatively large solid solution strengthening effect.
By strengthening the aluminum bar, its compressive strength will be significantly improved, but its compressive strength can not be continuously improved; When the maximum compressive strength is reached, no matter what method is used, the compressive strength of the aluminum bar cannot be further improved. The only choice is to choose a brand with a higher compressive strength.
Post time: May-26-2022