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中文摘要：
用热力学计算、差热曲线和金相法确定了一种第二代镍基单晶高温合金的固溶时效热处理工艺。结果表明：经过1315℃×4h的逐级保温固溶处理后，合金中的铸态7／y^1共晶组织得到有效溶解；再经过1150℃X4h的时效热处理后，获得尺寸为0．44υm、体积分数为62％和立方度较好的y^1相；经以上固溶和一级时效处理，再经过870℃×24h二级时效处理后，合金的持久性能达到国外同类材料的先进水平。
英文摘要：
The solid solution and aging process for a second generation Ni-based single crystal superalloy was investigated by the assistance of thermodynamic calculation, DSC curve and metallography. Results show that cast y/y^1 eutectic in the superalloy was dissolved after step-wise solid solution at 1 315 ℃ for 4 h. After followed aging at 1 150 ℃ X 4 h, the size of euboidal y^1 was 0. 44υm and its volume fraction was 62%. After the solid solution, first level aging and then the second aging at 870 ℃ for 24 h, this alloy showed excellent rupture property as good as that of foreign similar materials.
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