Abstract
Method of wire continuous combined deformational processing is described in the paper. The scheme of the laboratory setup is represented. The novelty of this design is that two drawing dies and four-rolls system are ar-ranged in one line which makes it possible to combine different kinds of plastic deformation by drawing with bending and torsion. High carbon steel wire 0.7 % C was chosen for investigation. Experiments were carried out for investiga-tion of peculiarities in wire microstructure changes after combined deformational processing. Scanning electron mi-croscopy was used to study of wire microstructure specific features after combined deformational processing. Wire me-chanical properties after different kinds of deformational processing were obtained by tensile test. It was shown that changes of high carbon steel wire microstructure lead to variation of its strength properties. Combined deformational processing by drawing with bending and torsion ensure both high strength and ductile properties in wire of the same diameter. It is typical to metals with ultrafine grain structure. The obtained results of the investigation allow to con-clude about the perspectiveness of chosen direction in combination of different kinds of deformational processing for obtaining pearlitic high carbon steel wire with desired level of mechanical properties.
Keywords
High carbon steel wire, combined deformational processing, pearlite, microstructure, mechanical properties.