Abstract:Aiming at the problems that the Ti-6Al-4V blade with thinned edge caused by the corrosion of strong airflow and flue gas, the performance degradation of the remanufacture cladding layer and the interface. The same cladding alloy with high matching degree and good formability with Ti-6Al-4V blade substrate was chosen, through the element matching contrast, the analysis of energy dispersion law, the metallographic evaluation, the remanufacture forming experiment and the verification of basic mechanical properties, the research on the performance of remanufacture cladding layer and interface controlling was carried. The experiments results show that, the content of Ti, Al and V are respectively about 80%, 3.9~5.5% and 3.0~3.5%. The contents of the main elements above are basically consistent with the substrate. The interface is composed of initial equiaxed α phase, partially flake β phase and along with a small amount of needle-shaped α" martensite on the β phase grain boundary, all which constitute the initial basket structure. The β phase in the interface is refined and differentiated into granular, dispersing in the basket tissue. Further, the β phase at the interface is of pinning effect to the grain boundary of the staggered baskets, which is beneficial to improve the coating strength. Finally, the micro-hardness of the coating is 315.08~351.76HV0.1, which is lower than the substrate. Through the research above, not only the good forming of Ti-6Al-4V blade with edge thinning was realized, but also the related technology and methods of the cladding layer and the interface performance controlling were validated effectively.