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汽轮机转子长期在高温、高压状态下运行，发生了材质软化现象。材质软化影响着材料的疲劳及蠕变力学性能。通过对转子材料实验结果的分析与研究，以硬度作为参量，建立了全应变范围与致裂循环次数之间的关系以及蠕变寿命与Ｌａｒｓｏｎ－Ｍｉｌｅｒ参数之间的关系。提出了考虑材料软化老化转子寿命损耗的计算方法，阐述了以硬度作为参量，如何评价转子的疲劳及蠕变剩余寿命，为老机组安全可靠运行、提高寿命预测精度以及转子使用寿命的无损诊断提供了依据
Turbine rotor long-term high temperature and high pressure operation, the material softening occurred. Material softening affects the fatigue and creep mechanical properties of the material. Through the analysis and research on the experimental results of the rotor materials, the relationship between the full strain range and the number of cracking cycles and the relationship between the creep life and the Larson-Miler parameters are established based on the hardness. The method to calculate the life loss of softening aging rotor is put forward. How to evaluate the fatigue life and remaining creep life of the rotor, how to evaluate the rotor life expectancy, how to evaluate the life prediction accuracy of the old unit and the service life of the rotor The basis