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| Research Status and Prospect of Welding Repair Technology for Aero-Engine Blades |
| ZHUO Yimin, CHEN Yuanhang, YANG Chunli |
| (State Key Laboratory of Modern Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China) |
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Abstract Aero-engine blades are subjected to complex and harsh environment in the long term. Due the extremely hostile temperature and pressure, blades are prone to various types of defects. Since the replacement of blades is exceedingly expensive, the research on repair and reconstruction of blade has enormous economic benefits. Aero-engine blades mainly contain nickel-based superalloy gas turbine blades and titanium-based compressor blades. Because of the difference in service environment and material, the defects of two types of blades are different, the repair method and the performance to be achieved after the repair are different. In this paper, the repair methods and key technologies adopted at the current stage for the common damage defects of the two types blades are analyzed, which aims at providing a fundamental guideline for high quality repair and remanufacturing of aero-engine blades.
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2021, 
