【摘要】 通过对Ni基合金进行激光熔覆γTiAl基合金涂层处理,对γTiAl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/γTiAl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/γTiAl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/γTiAl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60MPa、连接时间1h的连接条件及900℃保温0.5h连接后续热处理,实现了Ni基合金/γTiAl基合金的连接。更多还原

【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.)更多还原