Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture
Health, Engineering and Science
School of Engineering
Pearlitic steel rods with inherited texture (IT) were prepared from pre-drawing followed by austenitization treatment. Effects of inherited texture on the microstructure and mechanical properties of cold-drawn pearlitic wires were investigated. The 〈1. 1. 0〉 texture of ferrite increased with drawing strain and became saturated when strain reached about 2.0. However, wires with IT showed a higher 〈1. 1. 0〉 texture intensity. The ratio of bent over straight pearlite colonies in wires with IT were about 20% lower than that of wire without IT in drawing. Additionally, Wires with IT showed a greater work hardening rate. Tensile strength of wires without IT increased from 1260. MPa to 3010. MPa as drawing strain increased to 3.5, while wire with IT exhibited an 7% increase in tensile strength (i.e., up to 3230. MPa). Torsion angle of wires with IT were about 13% higher than that of wires without IT. Differential scanning calorimetry (DSC) analysis showed that wires with IT have higher thermal stability.