Creep and microstructure evolution of foreign and domestic 10Cr rotor steel

In order to understand the property features of domestic 10Cr steel used for turbine rotor in ultra- supercritical unit, the research was conducted on domestic and foreign 10Cr steel for comparison. Firstly, the development of rotor steel and research situation of foreign and domestic 10Cr steel were introduced. The creep and microstructure evolution was studied on foreign and domestic 10Cr rotor steel for comparison. The results indicate that creep rupture strength at 595?? of the foreign 10Cr steel is higher than that of domestic 10Cr steel. The foreign and domestic 10Cr rotor steels have similar microstructure evolution features. With increasing time, different phases including M23C6?? MX?? Laves propagate, accumulate and grow subsequently. The Nb- rich phase with large size is found in domestic 10Cr steel and thought to have negative influence on properties.