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白亚冠,聂义宏,朱怀沈,赵帅.Al-Nb含量对转子用GH706合金组织及力学性能的影响[J].稀有金属材料与工程(英文),2019,48(4):1317~1324.[Bai Yaguan,Nie Yihong,Zhu Huaishen and Zhao Shuai.Effect of Al-Nb Content on Microstructure and Properties of GH706 Alloy for Rotor[J].Rare Metal Materials and Engineering,2019,48(4):1317~1324.]
Effect of Al-Nb Content on Microstructure and Properties of GH706 Alloy for Rotor
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Received:September 08, 2017  Revised:December 18, 2017
DOI:
Key words: GH706  long time age  precipitate  mechanical properties
Foundation item:国家能源应用技术研究及工程示范项目(项目号NY20150101-1)
Author NameAffiliation
Bai Yaguan,Nie Yihong,Zhu Huaishen and Zhao Shuai  
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Abstract:
      The effects of increasing Al and decreasing Nb on microstructure and mechanical properties of GH706 alloy before and after long time age heat treat were studied. Result show that increasing Al content and decreasing Nb content in alloy contribute to disappear of γ′′、Laves and δ phases in alloy, and after aged at 750℃ for 500h, γ′ and η grow up slightly and mechanical properties reduce limited. While precipitates of alloy without modification(conventional GH706) grow up rapidly and mechanical properties decrease obviously. The result indicated that the alloy can be used at higher temperature with modification of increasing Al and decreasing Nb.