Highly Efficient and Energy-Saving Production Technology of Wires of Different Profiles

摘要

A significant increase of the knowledge of the phenomena occurring during deformation of metallic materials made it possible to control their structure through externally induced changes in the deformation path. Such a procedure guarantees both the limitation of the role of the fine, multi-system slip strengthening the material, and the strong domination of the energy-saving mechanism of localized plastic flow in shear bands. This is manifested, in industrial scale, by the possibility of increasing the total strain of the deformed material and decreasing the temperature of the process (economical and ecological advantages), while retaining the desired structure and the functional properties of the products. The new, presently implemented production technology (KOBO-type Forming) of the aluminum wires of different profiles, is directly based on the knowledge of the evolution of sub/structure in the course of the changing of the loading scheme (deformation path), and it consists in the realization of two operation in one pass at ambient temperature, i.e. rolling (cross section reduction approx= 10 percent) and extrusion (extrusion ratio lambda approx= 13) with simultaneous reversible torsion.