About recrystallization of aluminum in the radial extrusion
A promising method for axisymmetric parts with flanges and thickening is the radial squeezing. It is over the metal in the radial direction. The presence of high degrees of deformation makes it possible to obtain accurate and quality filling in the form of finished product. The economic effect is achieved by reducing the flow metal, which is an important factor in the manufacture of parts from non-ferrous metals and splavov.Dlya study process radial extrusion, and conduct pilot studies in DonFTI has developed a new scheme of radial extrusion, which is the presence of punch-rassekatelya. This design feature allows you to solve two problems: First, it provides a uniform radius of the metal during the second - creates a more complex configuration workpiece, the most close to the ultimate form of izdeliya.For studies were used cylindrical samples of technically pure aluminum AD1. Samples were made by turning of the rods, followed by annealing. As a lubricating material using a mixture of wax, castor oil, and rosin. Extrusion occurred at room temperature ( sample previously heated). Recording of the working sensors was carried out using the kit tensometric equipment
Figure 1 - Schedule of distribution of hardness along the length of the specimen from the center to pereferii
From the installation of the product samples have been cut off, followed by buffing them, revealing the structure were conducted measurements of firmness. The paper provides a schedule of distribution of hardness along the length of the specimen (Figure 1), Microstructure source (Figure 2) and the deformed aluminum (Figure 3).
Figure 2 - Microstructure initial sample
