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本文对几种常用的弹性合金的高温长时效行为进行了研究,弄清了组织变化规律和高温稳定性能,找出了提高现有弹性合金的使用温度的途径.试验合金在高温长时效过程中,晶内球状γ’相长大;同时发生γ’→η相转变。大于850℃的高温时效可由基体直接折出η相.有些合金可能出现有害的 TCP 相。适当提高固溶温度;减少时效前的变形度;适当变动化学成分等,可提高合金高温稳定性,从而将使用温度提高.
In this paper, the long-term high temperature aging behavior of several commonly used elastic alloys was studied, and the rules of microstructure and high temperature stability were clarified, and the way to improve the service temperature of the existing elastic alloys was found out. , Intragranular globular γ ’phase grows; γ’ → η phase transition occurs at the same time. High temperature aging greater than 850 ℃ can be directly out of the matrix η phase. Some alloys may appear harmful TCP phase. Appropriate to increase the solution temperature; reduce the deformation before aging; appropriate changes in chemical composition, etc., can improve the high temperature stability of the alloy, which will use the temperature increase.