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材料工程  2008 

热等静压对DD3单晶高温合金组织与性能的影响

, PP. 40-43

Keywords: 热等静压,DD3,单晶高温合金,组织,性能

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Abstract:

选用两种热等静压工艺对DD3合金进行热等静压实验,研究了热等静压对DD3单晶高温合金组织与性能的影响。观察、分析了热等静压及完全热处理后组织,测试了经热等静压并热处理后合金的持久、蠕变及拉伸性能。结果表明热等静压工艺可部分或完全消除DD3合金的铸造疏松或缩孔,但导致合金γ′强化相的回溶和不规则长大,热处理后γ′相粗大且立方化和规则性差,合金的中、高温持久和蠕变性能有所降低,对900℃拉伸性能无明显影响。

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