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Alok Srivastava,Ashok Kamaraj,Durbadal Mandal,K. Mondal,Gopi K. Mandal 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7
The present work discusses the evolution of microstructure and non-metallic inclusions during wire drawing process in asynthetic slag-treated 5.5 mm diameter high carbon wire rod steel. It has been observed that failure of the as-received wirerod (without synthetic slag treatment) takes place at different stages of deformation during wire drawing operation. However,in case of the synthetic slag-treated wire rods (TW specimen), failure takes place consistently at ~ 95% reduction in thecross-sectional area of the wire. In a quest to understand the failure mechanisms during wire drawing process, a systematicstudy has been carried out by analyzing the microstructures and non-metallic inclusions in the steel wires drawn at variousstages of deformation. The improved drawability of the treated wire specimens is attributed to the decrease in the amountof unfavourable non-deformable inclusions in the steel matrix, and this stems from the synthetic slag treatment of the liquidsteel. Microstructural investigation also confirms the complete realignment of pearlite colonies along the wire drawingdirection followed by thinning and disintegration of cementite lamellae at higher deformation, particularly in case of thesynthetic slag-treated wire rod steel.