High-temperature-resistant transverse wave electromagnetic ultrasonic transducer

Abstract

The invention discloses a high-temperature-resistant transverse wave electromagnetic ultrasonic transducer which comprises a high-temperature-resistant metal shell, a magnet exciting coil, an eddy current coil, a copper foil sheet, a mica sheet, a high-temperature-resistant metal sheet, high-temperature-resistant ceramic glue, a connecting rod and a heat insulation handle, wherein the magnet exciting coil and the high-temperature-resistant metal sheet are poured on an outer ring of a cylindrical recess of the high-temperature-resistant metal shell by adopting high-temperature-resistant ceramic glue; the eddy current coil, the copper foil and the mica sheet are poured in the center of the cylindrical recess of the high-temperature-resistant metal shell by adopting high-temperature-resistant ceramic glue; the lower end of the connecting rod is welded to the center of the upper surface of the high-temperature-resistant metal shell, and the upper end is sleeved with a heat-insulating handle. The transducer is made of a high-temperature-resistant flexible material, the working end of the transducer can be poured according to the irregular surface of a tested piece and can be tightly attached to a high-temperature metal component with the complex surface during detection, lift-off of an eddy current coil and a magnet exciting coil is reduced, and the eddy current strength and the static magnetic field strength in the material can be enhanced.

Description

Technical field [0001] The present invention belongs to the field of electromagnetic ultrasonic non-destructive detection, and is related to an electromagnetic ultrasonic transducer, and more particularly to a high-temperature transverse wave electromagnetic ultrasonic transducer. Background technique [0002] In the process of aerospace, petrochemical, metallurgy, nuclear power and other industries, metal materials often at 300 to 1200 ° C in the process of production, processing and service. Metal materials that have been served under high temperature conditions, and their tissue structure and performance can result in major safety hazards in high temperature components. Such as pipelines, pressure vessels, tanks and absorbent tubes, operating at high temperatures, creep, thermal machinery fatigue or thermal corrosion. [0003] High-temperature piezoelectric ultrasonic transducers are deficient due to lack of suitable high temperature coupling agents, resulting in current high ...

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Problems solved by technology

[0008] However, at present, in the report on the high-temperature-resistant air-core excitation coil type EMAT, the probe is rigid, and the working surface of the probe is flat, which cannot meet the detection requirements of high-temperature metals with curvature or narrow spaces such as pipelines and pressure vessels.

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