Vliv parametrů izotermického žíhání na mikrostrukturu a vlastnosti vybraných jakostí konstrukčních ocelí

Abstract

This diploma thesis deals with effect of heat treatment parameters of isothermal annealing influence on the microstructure and properties of steels. The theoretical part contains introduction to the heat treatment of steels, above all isothermal annealing. Furthermore, the thesis includes basic attributes of diffusion, taking place in steels during increased temperatures. In this thesis are involved perlitic transformation attributes, related to processes during the heat treatment, especially impact of temperature on interlamellar spacing of pearlite and determination of interlamellar spacing. The experimental part is devoted to the characterization of structures of steels, including their decarburization and determination of the interlamellar spacing of pearlite, created during the isothermal annealing of selected structural steels. Outside the above, the experimental part includes mechanical test results of chosen isothermal annealed steels, too.