| 均匀化处理对TiAl 合金铸造组织的影响 |
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| 引用本文： | 齐立春,李臻熙,黄,旭,曹京霞.均匀化处理对TiAl 合金铸造组织的影响[J].宇航材料工艺,2010,40(3). |
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| 作者姓名： | 齐立春 李臻熙 黄 旭 曹京霞 |
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| 作者单位： | 北京航空材料研究院,北京,100095 |
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| 摘 要： | 研究了均匀化处理对两种含B的铸造TiAl合金铸造组织的影响。研究发现1 370℃/5 min/OQ+1150℃/6 h/AC均匀化热处理能有效消除B2相,将b稳定化元素固溶到基体中,实现成分均匀化;1 370℃/5 min/OQ+1 150℃/24 h/AC均匀化热处理后可使粗大的铸造片层组织分解转变为细晶近g组织,平均晶粒直径50mm。
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| 关 键 词： | TiAl合金 B2相 偏析 均匀化热处理工艺 |
Effect of Homogenizing Treatment on Microstructure of Cast TiAl Based Alloys |
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| Qi Lichun,Li Zhenxi,Huang Xu,Cao Jingxia.Effect of Homogenizing Treatment on Microstructure of Cast TiAl Based Alloys[J].Aerospace Materials & Technology,2010,40(3). |
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| Authors: | Qi Lichun Li Zhenxi Huang Xu Cao Jingxia |
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| Institution: | (Beijing Institute of Aeronautical Materials |
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| Abstract: | The effect of homogenizing treatment on the microstructures of two cast TiAl alloy with B addition was
investigated. It is found that homogenizing treatment at 1 370 /5min/ OQ and 1 150 /6 h/ AC can efficiently promote the elimination of B2 phase segregation,and the solution of bstabilizing elements to the matrix results in composition homogenization. The coarse as cast lamellar microstructures can be decomposed completely and transformed into fine near gmicrostructures through the above homogenizing treatment. The average grain size of fully lamellar microstructures is about 50 mm.
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| Keywords: | TiAl alloy B2 phase Segregation Homogenizing treatment |
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