| TiAl/Ni基合金反应钎焊接头的微观组织及剪切强度(英文) |
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| 引用本文： | 李海新,何鹏,林铁松,潘峰,冯吉才,黄玉东. TiAl/Ni基合金反应钎焊接头的微观组织及剪切强度(英文)[J]. 中国有色金属学会会刊, 2012, 22(2): 324-329. DOI: 10.1016/S1003-6326(11)61178-3 |
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| 作者姓名： | 李海新 何鹏 林铁松 潘峰 冯吉才 黄玉东 |
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| 作者单位： | 哈尔滨工业大学先进焊接与连接国家重点实验室;哈尔滨工业大学化工学院 |
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| 基金项目： | Projects (50975062, 51105107, 51021002) supported by the National Natural Science Foundation of China;Projects (QC2011C044) supported by the Natural Science Foundation of Heilongjiang Province,China;Project (20112302130005) supported by the Specialized Research Fund for the Doctoral Program of Higher Education,China;Project (CUGA4130902510) supported by the China Postdoctoral Science Foundation Funded |
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| 摘 要： | 以Ti为中间层,对TiAl基金属间化合物与Ni基高温合金进行反应钎焊连接,研究反应钎焊接头的界面微观结构及剪切强度。通过实验发现,熔融中间层与两侧母材反应剧烈,生成连续的界面反应层。典型的界面微观结构为GH99/(Ni,Cr)ss(γ)/TiNi(β2)+TiNi2Al(τ4)+Ti2Ni(δ)/δ+Ti3Al(α2)+Al3NiTi2(τ3)/α2+τ3/TiAl。当钎焊温度为1000°C,保温时间10min时,所得接头的剪切强度最高为258MPa。进一步升高钎焊温度或延长保温时间,会引起钎缝组织中组成相粗化和脆性金属间化合物层的生成,从而导致接头剪切强度的降低。
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| 关 键 词： | TiAl Ni基合金 反应钎焊 界面微观结构 剪切强度 |
| 收稿时间： | 2011-03-09 |
Microstructure and shear strength of reactive brazing joints of TiAl/Ni-based alloy |
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| LI Hai-xin,HE Peng,LIN Tie-song,PAN Feng,FENG Ji-cai,HUANG Yu-dong. Microstructure and shear strength of reactive brazing joints of TiAl/Ni-based alloy[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(2): 324-329. DOI: 10.1016/S1003-6326(11)61178-3 |
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| Authors: | LI Hai-xin HE Peng LIN Tie-song PAN Feng FENG Ji-cai HUANG Yu-dong |
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| Affiliation: | 1.State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;2.School of Chemical Engineering and Technology,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | Reactive brazing of TiAl-based intermetallics and Ni-based alloy with Ti foil as interlayer was investigated.The interfacial microstructure and shear strength of the joints were studied.According to the experimental observations,the molten interlayer reacts vigorously with base metals,forming several continuous reaction layers.The typical interfacial microstructure of the joint can be expressed as GH99/(Ni,Cr)ss(γ)/TiNi(β2)+TiNi2Al(τ4)+Ti2Ni(δ)/δ+Ti3Al(α2)+Al3NiTi2(τ3)/α2 +τ3/TiAl.The maximum shear strength is 258 MPa for the specimen brazed at 1000 ℃ for 10 min.Higher brazing temperature or longer brazing time causes coarsening of the phases in the brazing seam and formation of brittle intermetallic layer,which greatly depresses the shear strength of the joints. |
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| Keywords: | TiAl Ni-based alloy reactive brazing interfacial microstructure shear strength |
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