Vliv intenzity ochlazování na výslednou tvrdost kolejnice v závislosti na mezilamelární vzdálenosti perlitu

Abstract

This Master's thesis investigates the influence of controlled cooling parameters on the interlamellar spacing and mechanical properties of pearlitic rail steels. The theoretical section describes modern rail steels, their operational degradation mechanisms, phase transformation mechanisms, and the principles of scanning electron microscopy. The experimental part focuses on the analysis of two rail samples with different head cooling intensities. Using a combination of light and scanning electron microscopy and the circular intercept method, the true pearlite interlamellar spacing was determined. Subsequently, depth profiles of Brinell hardness and Vickers microhardness were evaluated.