Effect of solution treatment on the micropore and mechanical properties is investigated for the DD6 superalloy. The results show that solution treatment has positive and negative effects on the DD6 superalloy, which can weaken the segregation significantly. After solution treatment, the segregation ratio of the major alloying elements tends to 1. However, the amount of micropores increases with increasing solutionising time and can reach 0.46%, which is one order of magnitude higher than that of the as-cast superalloy. The hardness increases slightly, especially for the superalloy solutionised at 1310°C with a 5% increase in hardness compared to the as-cast superalloy. Hardness, tensile and stress rupture properties of the DD6 superalloy can reach the best after solution treatment at 1310°C and 4 h.

中文翻译：

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固溶处理对DD6高温合金微孔及力学性能的影响

研究了固溶处理对 DD6 高温合金微孔和力学性能的影响。结果表明，固溶处理对DD6高温合金有正面和负面的影响，可以显着减弱偏析。固溶处理后，主要合金元素的偏析比趋于1。但微孔的数量随着固溶时间的增加而增加，可达0.46%，比铸态高温合金高一个数量级。硬度略有增加，特别是对于在 1310°C 下固溶的高温合金，与铸态高温合金相比，硬度增加了 5%。DD6高温合金的硬度、拉伸和应力断裂性能在1310℃和4h固溶处理后均达到最佳。