Vliv tepelného zpracování na mechanické vlastnosti svarového spoje oceli T24

Abstract

The bachelor’s thesis deals with the influence of heat treatment on newly developed, low-alloy, refractory steel T24 after welding. This steel is mainly used in the thermal energy industry. It is used for boiler pipes, membrane partitions and tubular components. The steal was developed for ultra-super-critical parameters of steam (over 600 °C, over 300 bar). The steel will be welded by the method 141. This evolves welding with a non-melting electrode in a protective inert gas. The method is suitable for welding low-alloy steels. The heat treatment will be conducted on half of the samples, after the welding. Afterwards the samples will be subjected to destructive tests, specifically the test of hardness and the metallographic test. The aim of the bachelor´s thesis is to determinate the influence of heat treatment on the mechanical proprieties of a weld at the room temperature, which relates to the resistence while creep. The theoretic presumption is that the temperature of heat treatment radically influences the final properties of a weld.