Změny struktury TMZ oceli při svařování a následném rovnání kyslíko-acetylénovým plamenem

Abstract

The diploma thesis deals with the properties of thermomechanically processed steels, their production and the mechanism of their increased mechanical properties. For the experimental part, the samples were manufactured from the TMZ steel of steel grade S355MC and welded using the 135 (MAG) method. Subsequently, one of the samples was simulated to straightening using oxygen-acetylene flame at a temperature up to 800 °C, while the other sample was left in the welded state. To compare changes in mechanical properties and changes in the structure in the close vicinity of the weld for both cases, non-destructive and destructive tests were performed.