时效热处理对镍基单晶高温合金组织的影响

 研究了经不同时效热处理后一种镍基单晶高温合金γ′相的形貌。结果表明：不同的时效热处理制度对所研究镍基单晶高温合金γ′相形貌影响显著。一次时效处理使固溶态γ′相平均尺寸增大；1 080 ℃×6 h一次时效+〖JP〗二次时效处理对γ′相平均尺寸的影响不明显，只加强了γ′相的规则度；1 050 ℃×16 h一次时效+二次时效处理时，γ′相尺寸増长显著。合金经850 ℃×24 h二次时效后，γ′/γ基体通道中均有更细小的二次或三次γ′相析出。

Influence of Aging Treatment on Structure of Single Crystal Nickel Base Superalloy

The influence of aging treatment on the γ′ phase morphology has been studied. The results indicated that there is some difference among the γ′ phase morphology under the different heat treatment conditions. The average size of γ′ phase increased after first stage aging treatment, and no significant change in the size of γ′ phase was observed during second stage aging treatment except the increase of γ′ phase regularity after 1 080 ℃×6 h first stage aging. However, significant increase in the size of γ′ phase was observed during second stage aging treatment after 1 050 ℃×16 h first stage aging. When the 850 ℃×24 h second aging was adopted, there is more finer second or third γ′ phase in the rest matrix.