Dependence of Mesoscale Structure of Drawn High-Carbon Steel Wire on Wire Diameter

This study aims to clarify the transition of mesoscale structure of a drawn wire versus drawing strain. High-carbon steel wires 0.276, 0.444, and 0.936 mm in diameter were drawn until wires could be drawn without rupture. Two results were obtained from a crystal orientation analysis of the electron backscatter diffraction pattern. First, the mesoscale structure in the wire consisted only of a subprimary fiber texture {100} -{111} at the drawing limit, that is the largest drawing strain when the wire could be drawn without rupture. Second, it is predicted that the transition of the mesoscale structure versus the drawing strain will occur as follows regardless of the initial wire diameter: In the beginning of wire drawing, the wire will have only a primary fiber texture {100} -{111} . After a slight increase in the drawing strain, the wire will have the primary fiber texture at its outer side and a secondary fiber texture {111} -{110} at the inner side. After a further increase in the drawing strain, the wire will have a subprimary fiber texture at the outer side and a secondary fiber texture at the inner side. Moreover, increase in the drawing strain, the wire will have only a subprimary fiber texture.