AN EXPERIMENTAL STUDY ON THE LOW CYCLE FATIGUE BEHAVIORS OF DOMESTIC IP ROTOR STEEL FOR 1000MW ULTRA-SUPERCRITICAL TURBINE
Due to the good combination of high temperature strength and manufacturing performance,10%Cr steel has been widely used as the material of 1000MW ultra-supercritical turbine HP/IP rotors in China.In addition to creep strength,good low cycle fatigue resistance is needed for rotors design and service safety because high cyclic stresses are often produced during start-stop and variable load operations of turbine.In this paper,low cycle fatigue experiments of 12Cr10Mo1W1NiVNbN steel,which is a domestic IP rotor steel used in ultra-supercritical turbines,were carried out under constant strain condition at room temperature and 873K.The cyclic stress-strain relationship and strain-life curve were established using Ramberg-Osgood and Manson-Coffin equations,respectively.The transition fatigue life of the material was also obtained,over which the elastic strain dominates the fatigue life and under which the plastic strain does.Finally,the low cycle fatigue property of the current steel is compared with that of the German rotor materials reported in the literatures.
turbine rotor low cycle fatigue 10 Cr steel cyclic stress strain life
Yanfeng Wang Fusheng Lin Shuangqun Zhao
Shanghai Power Equipment Research Institute No.1115 Jianchuan Road,Minhang District Shanghai,200240,China
国际会议
Energy Materials 2014(第一届能源材料国际会议)
西安
英文
185-192
2014-11-04（万方平台首次上网日期，不代表论文的发表时间）