航空学报 > 2005, Vol. 26 Issue (3): 380-384

Ni基合金与γ-TiAl基合金的固态连接规律研究

李子夫1,2, 吴国清1, 黄正1   

  1. 1. 北京航空航天大学 材料科学与工程学院, 北京 100083;2. 哈尔滨工业大学 现代焊接生产技术国家重点实验室, 哈尔滨 150001
  • 收稿日期:2004-05-21 修回日期:2004-09-20 出版日期:2005-06-25 发布日期:2005-06-25

Solid State Bonding of Ni Based Alloy with γ-TiAl Based Alloy

LI Zi-fu1,2, WU Guo-qing1, HUANG Zheng1   

  1. 1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;2. National Key Laboratory of Advanced Welding, Harbin Institute of Technology, Harbin 150001, China
  • Received:2004-05-21 Revised:2004-09-20 Online:2005-06-25 Published:2005-06-25

摘要: 通过对Ni基合金进行激光熔覆γ-TiAl基合金涂层处理,对γ-TiAl基合金进行激光表面熔凝处理,提出了一种采用激光表面改性技术和超塑扩散连接相结合的Ni基合金/γ-TiAl基合金连接新技术。研究了合金激光改性层的显微组织特征,探讨了Ni基合金/γ-TiAl基合金固态扩散连接的规律。结果表明:激光表面改性技术提高了Ni基合金/γ-TiAl基合金的连接质量,合金通过激光表面改性处理后,采用连接温度850℃、连接压力60MPa、连接时间1h的连接条件及900℃保温0.5h连接后续热处理,实现了Ni基合金/γ-TiAl基合金的连接。

关键词: γ-TiAl基合金, 激光表面改性, 扩散连接, 涂层

Abstract: A new superplastic diffusion bonding technique combined with laser surface modification to join Ni based alloy with γ-TiAl based alloy is proposed. Microstructures of laser surface modified coating on the substrate of intended bonding alloys are studied,and diffusion bonding of Ni based alloy with γ-TiAl based alloy is discussed. The results show that the laser surface modification improves the bonding quality of joint, and sound bond is achieved at 850℃ with a pressure of 60MPa in 1hour plus post heat treatment at 900℃ in 0.5hour.

Key words: γ-TiAl based alloy, laser surface modification, diffusion bonding, coating

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