Influence of Aging on Creep Rupture Properties of Heat Resistant Steels for Steam Turbine Rotors of Thermal Power Plants

Abstract:

Influences of aging on the creep rupture properties of super-clean 9%CrMoV steel and 1%CrMoV steel, the heat resistant steels for steam turbine rotors of thermal power plants, are investigated. Using the as-received and the aging-treated materials of the two steels, creep rupture tests are carried out at 566°C. Creep rupture lives, creep fracture modes as well as the microstructural changes of the specimens are examined. It is made clear that the creep strength and the microstructural stability of super-clean 9%CrMoV steel are superior to those of 1%CrMoV steel in long-term services.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 1122-1125
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.1122
• Online since: July 2011
• Authors: Li Bin Niu, Ippei Matsushima, Tetsuji Akiu
• Keywords: Aging, Creep, Creep Rupture, Heat Resistant Steel, Microstructural Stability, Steam Turbine Rotor

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