镍基高温合金HIP扩散连接的组织和性能  

Microstructure and Properties of Diffusion Couple of Superalloy Bonded by HIP

作　　者：闫来成[1] 燕平[2] 赵京晨[2] 

机构地区：[1]安泰科技股份有限公司,北京100081 [2]钢铁研究总院高温材料所,北京100081

出　　处：《钢铁研究学报》2012年第1期48-53,共6页Journal of Iron and Steel Research

摘　　要：采用热等静压扩散连接工艺,获得了DD402单晶合金与FGH95合金的扩散偶。研究了热等静压温度对扩散偶的持久性能、组织结构的影响。结果表明,不同温度热等静压的扩散偶均实现了冶金结合;结合界面区形成了一个组织过渡区,DD402单晶合金中的γ′相粒子在HIP过程中发生了筏形化;热处理后结合界面区的γ′相形貌和尺寸未发生明显变化。1 166℃热等静压扩散偶的650℃持久性能偏低,断口在DD402单晶合金侧,断裂面从结合界面区的大尺寸γ′相起始,沿{111}滑移面向筏形γ′相区扩展。The diffusion couple of single crystal DD402 and FGH95 were obtained by hot isostatic pressing （HIP） diffusion bonding. The effect of HIP temperature on the stress-rupture life and microstructure of diffusion couples were investigated. The results indicate that all diffusion couples are joined metallurgically under different HIP temperatures; In bonded interface zone, a transformation zone of microstructure is formed and the γ′ particles of single crystal DD402 are rafted during HIP; But γ′ size and morphology are not changed obviously during heat treatment. The 650 ℃stress-rupture life of bimetallic specimens bonded by 1 166℃ HIP is lower; fractures are broken on the side of single crystal DD402, the fracture place is produced from the situation of big γ＇ particles in bonding interface, and spread along { 111} slide place.

关 键 词：镍基高温合金 扩散连接 组织 性能 热等静压 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG453.9[金属学及工艺—合金]