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高温部件在实际使用状态下,往往经受变动温度,变动负荷和介质侵蚀的共同作用。电站设备如燃气轮机,由于燃料和空气分配的偏差,往往使燃烧室出口的平均温度产生±16%的差异;由于蒸汽锅炉内的汽压波动及外负荷脉动也将使蒸汽管道的温度发生波动,从而使发电机组部件受力发生变化。为了更好地判断高温部件的使用性能,研究材料在接近使用状态下的持久和蠕变性能是十分必要的。
High temperature components in the actual use of the state, often subject to temperature changes, changes in load and media erosion of the common role. Due to the deviation of fuel and air distribution, the average temperature of the outlet of the combustion chamber often causes a difference of ± 16%. Since the fluctuation of the steam pressure and the pulsation of the external load in the steam boiler also cause the temperature of the steam pipe to fluctuate, So that the power unit components by force changes. In order to better judge the serviceability of high-temperature components, it is necessary to study the long-term and creep properties of materials in near-use conditions.