Ultrasonic detection reference block for heterogeneous inertia friction weld joint of aero-engine turbine rotor

Abstract

A reference block for ultrasonic phased array detection of the heterogeneous inertia friction weld joint of the aero-engine turbine rotor assembly is integrally of an arc-shaped structure. The reference block is made of GH4169 high-temperature alloy and FGH97 powder high-temperature alloy, the structure and the size of the reference block are completely the same as those of an inertia friction weld joint of a to-be-detected workpiece, and the actual detection working condition of the heterogeneous inertia friction weld joint of the turbine rotor assembly is fully simulated. The reference blockfor ultrasonic phased array detection of the heterogeneous inertia friction weld joint of the turbine rotor assembly is a local structure of a complete inertia friction weld joint area of the turbinerotor assembly; the reference block has the characteristics of small size, light weight, simple structure, high size precision and the like, and can provide high-precision calibration work of sensitivity of an instrument and probe combination for detecting frequency, gain and gate value of ultrasonic phased array detection of heterogeneous inertia friction weld joints of the turbine rotor assembly.

Description

technical field [0001] The invention relates to a comparative test block for ultrasonic detection of heterogeneous inertial friction welding seams of aeroengine turbine rotors. Background technique [0002] Aeroengine turbine rotor components are mostly made of superalloys and powdered superalloys, which have the characteristics of coarse grain structure and high acoustic impedance, resulting in large energy attenuation during the propagation of ultrasonic waves in superalloys and powdered superalloys. , leading to a serious reduction in the accuracy of ultrasonic testing of this material, which is not conducive to the effective detection of internal micro-defects. Secondly, the width of the fusion line of the inertial friction weld is only on the order of microns, which is much smaller than the width of the melted weld. At the same time, the inertial friction weld of heterogeneous materials has a large acoustic impedance difference, resulting in the weld even if it is flawl...

AI Technical Summary

Problems solved by technology

In addition, the artificial defect size of the comparison test block used for conventional ultrasonic testing sensitivity calibration is large, the structure is single, and it is different from the surface structure of the inertial friction weld, which cannot effectively unify the calibration conditions and the weld to be tested. The size of the artificial defects on the comparison test block is also large, which cannot better meet the high calibration accuracy requirements of the detection sensitivity of the heterogeneous inertial friction welds of the aeroengine turbine rotor assembly, and will also reduce the detection of small defects in the inertial friction welds. out rate

[0004] At present, in the existing technology, the comparison test block for ultrasonic phased array detection of inertial friction welded seam in the solid phase welding process has not yet achieved a unified standard. The size of the defect on the seam is smaller, and the artificial defect on the comparison test block used for the ultrasonic inspection of the conventional fusion weld can no longer improve the higher calibration accuracy required for the ultrasonic inspection of the inertial friction weld

Images