单晶高温合金表面缺陷焊接修复的研究进展

单晶高温合金的性能优异，但是制造成本昂贵，因此其表面缺陷的焊接修复一直是单晶高温合金领域的重要研究课题。本文全面阐述了各类焊接修复(包括熔焊、钎焊和瞬时液相扩散焊)方法对修复区的组织和修复后力学性能的影响，分析了各类焊接修复方法的局限性和存在的问题，并指出了单晶高温合金表面缺陷焊接修复的发展方向。

Research Progress of Repair Technology for Surface Defects of Single Crystal Superalloy

Single crystal superalloy has excellent properties at elevated temperature, but it is burdened with high manufacturing costs. The repair of single crystal superalloy by welding and joining has been an important research subject in the field of single crystal superalloy. In this paper, a comprehensive overview on the development of surface defects repair technology in the field of single crystal superalloy was presented, and the effect of repair technologies (including fusion welding, brazing and transient liquid phase bonding) on the microstructure and mechanical properties of the repaired zone was summarized. The problems and limitations of the present repair technologies were analyzed. Finally, the future development direction of repair technology was also proposed.