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蠕变和松驰力学性能。该文对转子材料软化问题进行了研究；建立了硬度与蠕变和应力松驰性能之间的解析关系式。研究结果表明，随着材料的软化，硬度下降，导致蠕变断裂寿命降低，最小蠕变速率增大，应力松驰加重。 Turbine rotor running at high temperature and pressure for a long time, material softening phenomenon occurred, material softening affect the material creep and relaxation mechanical properties. In this paper, the problem of rotor material softening is studied. The analytic relation between hardness and creep and stress relaxation properties is established. The results show that with the softening of the material, the hardness decreases, leading to the reduction of creep rupture life, the minimum creep rate and the stress relaxation.