A method for improving diffusion welding of TiAl45XD and GH4169 by adding Ti foil interlayer
TiAl 45XD and nickel-based alloys were joined in a vacuum hot-pressing sintering furnace by diffusion welding. Atomic diffusion was achieved using a Ti foil interlayer, which solved the problems of high residual stress and difficult processing, resulting in a tight joint with high hardness and low deformation.
CN122400752APending Publication Date: 2026-07-17NORTHWESTERN POLYTECHNICAL UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTHWESTERN POLYTECHNICAL UNIV
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies are difficult to effectively join TiAl 45XD and GH4169 alloys. The welding process results in high residual stress and is prone to cracking, and is also difficult to process.
Method used
A diffusion welding method was adopted, in which the TiAl 45XD and nickel-based alloy contact surfaces were subjected to micro-plastic deformation under certain temperature and pressure in a vacuum hot-press sintering furnace to achieve atomic diffusion bonding, and Ti foil interlayer was used for welding.
Benefits of technology
It reduces residual stress, improves welding quality, and produces tight joints without obvious shrinkage cavities or porosity, while increasing hardness, reducing deformation, and increasing shear strength.
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Figure CN122400752A_ABST
Abstract
本发明公开了一种TiAl 45XD和GH4169合金接头的方法，包括：砂纸打磨，机械抛光，酒精超声清洗TiAl 45XD和镍基合金的待焊端面；并且加入Ti箔中间层。将其对中接触放置在真空热压烧结炉中；进行抽真空，以8~10℃ / min的升温速率升温至450℃~650℃保温，之后继续升温至900℃保温，开始加压操作，加压速率为1~5MPa / min,10~30min后停止加压，压力为39.2MPa,保温保压60min;终处理，对所得到的TiAl 45XD与镍基合金构件进行打磨清洗。本发明获得了具有一定强度的焊接接头，其具有变形小、结合良好等优点。
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