Effect of Rolling and Galvanizing Process on Mechanical Properties of Mild Steel

Abstract

Mild steel is an alloy with a very vast range of applications and it is important to study the physical properties, and mechanical properties of mild steel. In this study, the effects of hot-rolling, cold-rolling, and galvanization on factors such as microstructure, and mechanical properties of mild steel were studied. In this experiment, there were 3 sample (hot rolling, cold rolling and galvanized sample) are prepared. Microstructures of mild steel treated with these processes were characterized using optical microscope and XRD. The study suggests that the ferrite phase is observed which BCC form of iron is in both the cases of hot rolled and cold rolled steel. After galvanization process, the microstructure was found as the combination of ferrite and pearlite phase. The mechanical properties such as hardness and strength were found to increase slightly on hot-rolling and increase drastically on cold-rolling. Galvanization process leads to a reduction in tensile strength and a small increase in its toughness.