现代航空发动机整体叶盘的先进修复技术

Advanced Repair Technologies of Modern Aero Engine Blisks

整体叶盘是新一代航空发动机中实现结构创新与技术跨越的核心部件,相比原有叶盘,设计的整体集成有助于减重、减级、增效、提高可靠性等。但是,整体叶盘在加工过程中由于误加工所致损伤,服役过程中叶片受外物打伤或因高周疲劳而损伤的情况时有发生,如果对叶盘进行整体更换,势必造成时间和经济上的巨大浪费。因此,整体叶盘的修复再制造技术就成为了制约这种先进结构获得广泛应用的一个关键。对整体叶盘修复技术国内外研究现状进行了评述,分析了包括钨极氩弧焊、线性摩擦焊、激光熔覆修复三种修复工艺方法的适用性。

The blisk is a core part of new generation aero engines for realization structure innovation and technology shift. Compared to conventional blade disk, integral design conduces to reduction weight, decrease grade, increase efficiency, elevation security, and so on. However, blisks damage occurred occasionally including mismatching and foreign object damage during manufacturing or prior service. Replacement the damaged blisk entirely certainly will result in tremendous time consuming and economy consuming. Therefore, the repair remanufacturing technology of blisks becomes a bottleneck of limit application of the advanced structure. The paper reviews the research status of blisks repair, and analyses the applicability of three repair processes including tungsten inert gas （TIG） welding, linear friction welding and laser cladding repair.