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系统研究了不同固溶处理、固溶+时效处理以及550~750℃长期时效10 000 h后GH80A合金组织和性能的变化规律.结果表明:γ'相的开始析出温度为930~950℃;冷却介质比固溶温度对冷却γ'相的影响大,水淬能够抑制GH80A合金γ'相的析出;时效温度对一次γ'相有重要影响;双时效处理才析出二次γ'相;随固溶温度升高,合金单/双时效后的强度稍有降低而塑性升高;长期时效温度不高于700℃时合金的组织稳定性良好,一次γ'相的粗化机制在700℃以下以扩散控制为主,750℃以界面控制为主.

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