Qualitative and quantitative analysis of hot rolled ductile cast iron as composite structure in building elements

Abstract

Ductile cast iron is similar to a composite structure with a metal matrix, and graphite nodules are considered additive particles inside the structure. The qualitative and quantitative analysis was done for hot-rolled ductile cast iron as a composite structure with graphite nodules as a reinforced element. The analysis was done at different hot rolling conditions and different cooling rates. The shape and graphite nodule distribution in the matrix were evaluated quantitatively using different parameters such as shape factor, volume fraction, mean free path, and graphite particles per unit length and per unit area. The directionality resulting from rolling was taken into consideration, so the measurements were done in the longitudinal and transverse directions. The measurements related to the matrix, such as grain size, number of grains per unit area, and intergranular surface ratio, were evaluated in the transverse and longitudinal directions as well. The difference between the structure on the surface attached to the rolling mill and the structure inside the samples was determined. This work aims to study the applications of hot-rolled ductile cast iron in building elements based on structure, which affects properties.