Influence of hybrid plastic deformation on the microstructure and mechanical properties of carbon-steel wire

Resumo

Since the mechanical properties of metals and alloys with ultrafine-grain structure are of great practical interest, the development of continuous methods of intense plastic deformation deserves attention. The introduction of nanostructuring methods in existing production processes is subject to numerous constraints, mainly associated with the dimensions of the machined workpiece. Continuous methods of intense plastic deformation must be introduced, with corresponding gains of expediency and productivity. The combination of different types of plastic deformation is promising. Carbon-steel wire is studied in the present work. If drawing is combined with external loading, its applicability in wire production may be greatly expanded. If drawing is combined with flexure and torsion, a new production technology may be developed for the production of ultrafine-grain components. In this approach, continuously moving wire is subjected to tensile deformation (by drawing), flexural deformation (on passing through a system of rollers), and torsional deformation. The instruments employed are versatile and compatible with existing industrial equipment. If drawing is combined with flexure and torsion, the carbon-steel wire produced are characterized by ultrafinegrain structure. This approach permits modification of the mechanical properties of the wire over a broad range, without loss of strength or plasticity.