Ni基合金/γ-TiAl基合金的超塑扩散连接  

Superplastic diffusion bonding of Ni based alloy/γ-TiAl based alloy

作　　者：李子夫[1] 吴国清[1] 黄正[1] 阮中健[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院

出　　处：《航空材料学报》2004年第6期16-19,24,共5页Journal of Aeronautical Materials

基　　金：航空基础科学基金(01H51004);中国博士后科学基金(2004035032)

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,将异种合金间的连接转化为具有相似显微组织特征的同种合金间的连接。研究了Ni基合金激光熔覆涂层的显微组织特征,探讨了激光表面改性处理和连接温度对Ni基合金/γ TiAl基合金扩散连接质量的影响。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。在连接温度900℃,连接压力60MPa,连接时间1h的连接条件下,可实现Ni基合金/γ TiAl基合金的连接。The intended bonding alloys of Ni based alloy and γ-TiAl based alloy were treated by laser surface modification, which provided a good structure condition for turning the bonding of dissimilar alloys to the bonding of similar alloys. Microstructures of laser cladding coating on the substrate of Ni based alloy and superplastic diffusion bonding of Ni based alloy with γ-TiAl based alloy at different bonding temperatures were discussed. The results showed that laser surface modification improved shear strength of the bond, and sound bond could be achieved at 900°C with a pressure of 60 MPa for 1 h.

关 键 词：NI基合金 Γ-TIAL基合金 扩散连接 激光熔覆 显微组织 激光表面改性技术 激光表面熔凝 涂层处理 转化 研究 

分 类 号：V252[一般工业技术—材料科学与工程] TG174[航空宇航科学与技术—航空宇航制造工程]