Connecting method of dissimilar gamma '-phase reinforced high-temperature alloy

The invention relates to a connection method of a dissimilar gamma '-phase reinforced high-temperature alloy. According to the method, fine regulation and control of the pre-welding structure of the base metal are achieved through the processes of stress relief annealing, solid solution treatment, aging treatment and the like, and the TLP diffusion bonding process and the mutual diffusion behavior between the interlayer alloy and the base metal are adjusted according to the pre-welding structure; the problems of rapid precipitation of gamma'phase and large microstructure change of 718Plus alloy and Ni3Al-based alloy in the TLP diffusion bonding process are solved, the defects of cavities, cracks, thick hard alloy and the like in a joint area are avoided, and a TLP diffusion bonding joint with uniform microstructure and good mechanical property is obtained. 本发明为一种异种γ′相强化高温合金的连接方法。该方法通过去应力退火、固溶和时效处理等工艺实现母材焊前组织的精细调控，并依据焊前组织调整TLP扩散连接工艺和中间层合金与母材之间的互扩散行为，解决718Plus合金和Ni3Al基合金在TLP扩散连接过程中γ′相的快速析出和微观组织变化大的问题，避免了接头区域空洞、