Microstructural stability and creep rupture strength of the martensitic steel P92 for advanced power plant

摘要

Japanese 9/100 Cr steel containing 0.5/100 Mo and 1.8/100 W (P92) has been investigated. Quantitative microstructural analyses using TEM of thin foils and extraction double replicas have been Carried out after different austenitization and tempering treatments and after creep deformation at 600 And 650 deg C. Statistical quantitative analyses were undertaken to determine the dislocation density within The martensite laths, the width of the martensite laths/subgrains and the size and distribution of the carbide And carbonitride precipitates.