Al-Nb含量对转子用GH706合金组织及力学性能的影响
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摘要
研究了提Al降Nb对GH706合金经过高温长时时效处理前后的组织与力学性能的影响。结果表明,提Al降Nb的成分改进抑制了高温不稳定存在的γ′′相、η相及Laves相和δ相等TCP相的析出,同时,在经过750℃保温500h的处理后,只存在γ′和η相的轻微长大,力学性能下降幅度有限,仍保持在一个较高的水平,而未进行成分改进的合金(传统GH706)中的析出相等均发生明显长大,力学性能下降幅度较大,可见提Al降Nb的成分改进可使得合金在更高的温度服役。
The effects of increasing Al content and decreasing Nb content on microstructure and mechanical properties of GH706 alloy before and after long time age heat treat were studied. The results show that increasing Al content and decreasing Nb content in alloy contribute to the disappearing of γ′′, η, Laves and δ phases in alloy. After aged at 750 ℃ for 500 h, γ′ and η grow up slightly and the mechanical properties have a limited reducing. While the precipitates of alloy without modification(conventional GH706) grow up rapidly and the mechanical properties decrease obviously. The alloy can be used at higher temperatures with modification of increasing Al content and decreasing Nb content.
The effects of increasing Al content and decreasing Nb content on microstructure and mechanical properties of GH706 alloy before and after long time age heat treat were studied. The results show that increasing Al content and decreasing Nb content in alloy contribute to the disappearing of γ′′, η, Laves and δ phases in alloy. After aged at 750 ℃ for 500 h, γ′ and η grow up slightly and the mechanical properties have a limited reducing. While the precipitates of alloy without modification(conventional GH706) grow up rapidly and the mechanical properties decrease obviously. The alloy can be used at higher temperatures with modification of increasing Al content and decreasing Nb content.
引文
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[3]Xin Xin(信昕),Sun Wenru(孙文儒),Duan Zhongyuan(段忠园)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2011,40(11):1946
[4]Sou U,Mitsumori F,Junichi T et al.Superalloys 718,625,706and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2001:71
[5]Takashi S,Tatsuya T,Yukoh S et al.Superalloys 718,625,706and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,1997:379
[6]Imano S,Sato J,Kamoshida H et al.Proceedings from the Sixth International Conference on Advances in Materials Technology for Fossil Power Plants[C].Ohio:ASMInternational,2010:423
[7]Imamo S,Doi H.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2005:77
[8]Xin Xin(信昕),Sun Wenru(孙文儒),Cheng Liping(程丽萍)et al.Journal of Materials and Metallurgy(材料与冶金学报)[J],2010,9(1):62
[9]Tatsuya T,Takashi S,Junichi T et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2001:269
[10]Li X,Kopp R,Wolske M.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2005:659
[11]Long Zhengdong(龙正东),Ma Peili(马培立),Zhong Zengyong(仲增墉).Journal of Iron and Steel Research(钢铁研究学报)[J],1997,9(1):21
[12]Dong Jianxin(董建新),Zhang Maicang(张麦仓),Zeng Yanping(曾燕屏).Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2006,35(2):176
[13]Remy L,Laniesse J,Aubert H.Materials Science and Engineering[J],1979,38(3):227
[14]Peng Yonghui(彭永辉),Wang Jihong(王继红),Wu Guilin(吴桂林)et al.Journal of Iron and Steel Research(钢铁研究学报)[J],2003,15(S1):72
[15]Matsumoto O,Honjo T,Ysaumoto Y et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,1997:389
[16]Xie Xishan(谢锡善),Dong Jianxin(董建新),Fu Shuhong(付书红)et al.Acta Metallurgica Sinica(金属学报)[J],2010,46(11):1289
[17]Berger C,Granacher J,Thoma A.Superalloys 718,625,706and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2001:489
[18]Rosler J,Muller S,Genovese D D et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,2001:523
[19]Kuhlman G W,Chakrabarti A K,Beaumont R A et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,1994:441
[20]Takashi S,Yukoh S,Tatsuya T et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,1996:627
[21]Takahashi T,Ishiguro T,Orita K et al.Superalloys 718,625,706 and Various Derivatives[C].Warrendale,PA:The Minerals,Metals and Materials Society,1994:557