Vliv fázových přeměn na vlastnosti uhlíkových ocelí

The thesis deals with the study of phase transformations of wrought carbon steels and their effect on mechanical properties. Attention was paid to the imperfections of primary crystallization and possibilities of their elimination. Special attention was paid to quenching of steels, mainly for the possibility of their resistance to cyclic loading (fati-gue) increasing. A distinction between fatigue damage ,,volume" for steel parts - eg. the springs and damage ,,contact" - eg. superficial damage of the track of rolling bearings. In practical tests on samples made from steel 12 050 has been verified the influence of hardening, annealing and quenching to the steel mechanical properties