A method for repairing defects of typical parts of tail nozzle mechanical adjustment system

Abstract

The invention relates to a method for repairing defects of typical parts of a tail nozzle mechanical adjustment system, which belongs to the technical field of repairing defects of aero-engine K424 material parts. The method for repairing the defect of a typical part of the tail nozzle mechanical adjustment system includes the following steps: S1, initial inspection, determining the position, length and depth of the crack; S2, grinding, grinding the crack, and forming an open groove after the crack is polished; S3 , repair, using high-precision laser forming equipment and high-energy precision welding repair machine to repair typical parts, including: repair preparation, preheating parts, cladding open grooves and their surrounding surfaces, grinding bonding layer, welding repair; S4 , Stress relief heat treatment after welding; S5, inspection. The method for repairing defects of typical parts of the tail nozzle mechanical adjustment system adopts the combined repair method of laser fusion welding + precision pulse welding, which has strong operability, stable welding parameters, and simple process, which effectively improves the qualified rate of parts repair and reduces maintenance costs.

Description

technical field [0001] The invention relates to the technical field of defect repairing of aero-engine K424 material parts, in particular to a method for repairing defects of typical parts of a tail nozzle mechanical adjustment system. Background technique [0002] The regulator and seal are one of the important parts of the tail nozzle of the aero-engine. Due to the high-temperature environment, cracks and ablation problems are relatively common, especially in stress-concentrated parts such as corners. After the engine is in operation, most of the regulators and seals are found to be cracked. It was scrapped beyond the standard, and the problem of K424 material regulating sheet and sealing sheet was particularly prominent. K424 is a nickel-based superalloy matrix material, which is a difficult-to-weld material with poor weldability. Typical parts based on K424 materials, such as regulators and seals, are prone to defects such as cracks and air bubbles when the body is direc...

AI Technical Summary

Problems solved by technology

K424 is a nickel-based superalloy matrix material, which is a difficult-to-weld material with poor weldability. Typical parts based on K424 materials, such as regulators and seals, are prone to defects such as cracks and bubbles when the body is directly welded. Currently, K424-based materials There is no effective repair method for the defects of the adjusting plate and sealing plate

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