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对IN783合金在不同热处理条件下的组织和拉伸性能进行了研究。结果表明:在标准热处理态的N783合金中,一次和二次β相同时存在,晶内形成两种尺寸的γ’相。在低于1150℃固溶处理后,晶粒长大速度慢,一次β相逐渐减少,二次β相析出增加,大尺寸γ’相稍有增加。高温固溶结合水淬处理,并缩短β时效时间,合金内析出密集细小的γ’相。IN783合金的拉伸强度对晶粒尺寸敏感,升高固溶温度后,合金的650℃强度逐渐降低,塑性变化不大。晶内析出密集细小的γ’相对合金晶内有强化作用,使粗晶合金保持了相当的强度。
The microstructure and tensile properties of IN783 alloy under different heat treatment conditions were studied. The results show that in the standard heat treatment N783 alloy, primary and secondary β phases exist at the same time, and two sizes of γ ’phase are formed in the crystal. After solution treatment below 1150 ℃, the grain growth rate is slow, the primary β phase decreases gradually, the secondary β phase increases and the large γ ’phase increases slightly. High temperature solution combined with water quenching, and shorten the β aging time, the alloy precipitated dense small γ ’phase. The tensile strength of IN783 alloy is sensitive to the grain size. After the solid solution temperature is increased, the strength of the alloy at 650 ℃ gradually decreases and the plasticity does not change much. Crystallization of small and dense precipitated γ ’alloy has a strengthening effect within the alloy, the coarse grain alloy to maintain a considerable strength.