Austenitic steels for boiler elements in USC power plants

摘要

Purpose: Characteristics of functional properties of austenitic-based steels used for construction of boilers withsupercritical and ultra-supercritical steam parameters.Design/methodology/approach: For selected austenitic steels in as-received state and after long-term annealingmicrostructural investigations were carried out with scanning and transmission electron microscope.Findings: Selected characteristics of structure and functional properties of materials to be used for criticalelements in the pressure section of power boilers were summarised in a single paperPractical implications: The steel characteristics presented in this paper are used for assessment of structuralchanges and changes in strength properties of material of elements after long-term service under creepconditions.Originality/value: The presented results of the mechanical properties, structure and in the precipitationprocesses are applied to evaluation the condition of the elements in further industrial service.