Vlastnosti heterogenních svarových spojů žáropevných ocelí

Abstract

This thesis is engaged in the evaluation of heterogeneous properities of welded joints heat – resistant steels used in power industry. The theoretical part is focused on analysing the properities and weldability of heat - resistant materials focused on a modified (9 – 12)% Cr steels martensitic type. The experimental part of this thesis contains the results of electron microscopy, namely the evaluation of weld joints after creep exposure in term of microstructure and local chemical composition. The aim of this thesis is to compare changes of chemical composition before and after creep exposure by electron microscopy using EDS methode.