Fe-Based Heat-Resistant Steels

Abstract

AbstractTo improve efficiency and reduce CO2 emission, ultra-supercritical (USC) technology for fossil power plants and Generation IV nuclear reactors for fission power plants are state of the art. Fe-based heat-resistant steels are employed as structural materials for significant components like steam pipes, boiler tubes, cladding tubes, evaporators, etc., facing extreme environments including creep, oxidation, corrosion, and radiation. The safety of such components depends on the performance of Fe-based heat-resistant steels under those complicated conditions and gets a lot of concern. Fe-based heat-resistant steels are a large family and hard to go into details for all of them. Therefore, two members with representative microstructures are chosen in this chapter. One is ferritic/martensitic (FM) heat-resistant steels, and the other is austenitic heat-resistant steels. Among FM heat-resistant steels, 9–12%Cr FM heat-resistant steels and FeCrAl steels are emphasized. In particular, the oxide dispersion-strengthened (ODS) steels are included as a special branch of FM heat-resistant steels. Then, the two members of Fe-based heat-resistant steels are subsequently reviewed on the following aspects: (1) alloying design strategy, (2) microstructure, (3) mechanical properties, (4) oxidation resistance, and (5) the compatibility with liquid metals which are coolants in advanced nuclear energy systems.KeywordsHeat-resistant steelAlloy designMicrostructureMechanical propertyOxidation resistance