Thermal barrier coating part electromagnetic eddy current thermal imaging non-destructive detection system and detection method thereof

Abstract

The invention relates to a thermal barrier coating part electromagnetic eddy current thermal imaging non-destructive detection system and a detection method thereof. The detection system comprises an electromagnetic heating device connected with a thermal barrier coating part requiring detection, an infrared thermal imager, and a computer connected with the infrared thermal imager. The detection method comprises that: a conductor coil of the electromagnetic heating device is wound on a thermal barrier coating part requiring detection, the conductor coil is connected with a power supply system, the infrared thermal imager is adopted to carry out infrared image acquisition on a coating surface temperature field of the thermal barrier coating part requiring detection, the acquired image is input into the computer, and computer processing is performed to finally obtain the detection result. According to the present invention, electromagnetic induction is adopted to heat a high temperature alloy substrate, and the ceramic coating surface temperature field is monitored to obtain defect distribution; heat generated by eddy current is uniformly distributed, the detection result has high accuracy, and errors due to different heat flow injection directions are avoided; the detection process does not cause damage on the thermal barrier coating part requiring detection; and detection speed is rapid, efficiency is high, operation is convenient, and cost is low.

Description

Technical field [0001] The invention relates to the technical field of defect monitoring of thermal barrier coating components, in particular to a nondestructive detection system and a detection method for electromagnetic eddy current thermal imaging of thermal barrier coating components. Background technique [0002] Thermal barrier coatings (TBC) is an advanced material system that is mainly applied to the surface of metal products working in high-temperature environments such as gas turbines and engine components. Thermal barrier coatings can prolong the thermal fatigue life of structural components and improve the oxidation resistance of structural components by blocking high temperatures. Thermal barrier coatings are generally composed of four parts, from the outside to the inside, they are ceramic coating, thermally grown oxide layer (TGO), transition layer (BC) and superalloy substrate. The ceramic coating plays the role of thermal barrier. . [0003] The main failure form...

AI Technical Summary

Problems solved by technology

Hole detection is a detection technology for turbine blades. It uses inspection holes to detect and evaluate the structure through optical images. This method does not cause damage and damage, and it is not necessary to decompose the detection object, but it cannot detect internal defects.

Ultrasonic CT detection technology is a technology that inverts the image of the internal structure of the object based on the scattered waves around the defect, and can detect 10 -2 M-level internal defects have high precision, but the equipment is expensive, the detection cost is high, and the detection technology is complicated

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