Experimental Investigations on Mechanical Properties of a High Cr Ferritic Steel for USC Steam Turbine Rotor

摘要：

Development of high temperature and high strength material is very essential for the construction of Ultra Super Critical (USC) power plants to improve the thermal efficiency and reduce CO2 emissions. In this work, the chemical composition design of a high Cr ferritic steel 1Cr10NiMoW2VNbN for USC steam turbine rotor is discussed. Tensile tests of the newly developed steel at both room temperature and elevated temperatures and creep rupture tests of smooth bar and Bridgman type notched bar are carried out. Kachanov-Robotnov creep damage function based on the Continuum Damage Mechanics (CDM) is employed to interpret the long-term creep strength. Extrapolation of experimental data and theoretical analysis indicate that the developed steel has the appropriate mechanical properties at 600°C and thus is capable as a candidate material for 600°C class USC steam turbine rotor.

关键词： USC power plant Turbine rotor material Mechanical properties Creep Notch susceptibility

作者: Huatang Yao Shufang Shen Fu-Zhen Xuan Zhengdong Wang Shan-Tung Tu

作者单位: School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

会议类型: 国际会议

会议名称: 2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)

会议地点: 杭州

会议语种:英文

在线出版日期: 2007-10-23（万方平台首次上网日期，不代表论文的发表时间）