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研究了温度、应力、显微组织及机组调峰时蠕变－疲劳交变作用对机炉高温部件蠕变损伤速度的影响。试验结果表明，随着工作温度或工作应力的提高，金相组织中贝氏体的存在及蠕变－疲劳交变作用均会促使高温部件损伤速度增大，从而显著降低工作寿命。根据损伤力学理论，通过试验提出了蠕变损伤量与剩余寿命的关系式。只要测定高温部件的蠕变损伤量，利用该公式即可预测部件的剩余寿命。本研究结果具有重要的工程实用价值。
The effects of temperature, stress, microstructure and creep-fatigue alternation on the creep damage rate of high temperature components of the boiler were investigated. The experimental results show that with the increase of working temperature or working stress, the existence of bainite and the alternating effect of creep and fatigue in the microstructure will promote the damage speed of high temperature components and reduce the service life significantly. According to the theory of damage mechanics, the relationship between the amount of creep damage and the remaining life is proposed through experiments. As long as the determination of creep damage to high temperature components, the use of this formula can predict the remaining life of components. The results of this study have important practical value.