A high temperature resistant transverse wave electromagnetic ultrasonic transducer

Abstract

The invention discloses a high temperature resistant transverse wave electromagnetic ultrasonic transducer, the electromagnetic ultrasonic transducer comprises a high temperature resistant metal shell, an excitation coil, an eddy current coil, a copper foil sheet, a mica sheet, a high temperature resistant metal sheet, and a high temperature resistant ceramic glue , connecting rod and heat-insulated handle, wherein: the excitation coil and high-temperature-resistant metal sheet are poured on the cylindrical concave outer ring of the high-temperature-resistant metal shell with high-temperature-resistant ceramic glue; the eddy current coil, copper foil and mica sheet are poured with high-temperature-resistant ceramic glue In the center of the cylindrical depression of the high-temperature-resistant metal shell; 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 covered with a heat-insulating handle. The transducer of the present invention is made of high-temperature-resistant flexible materials. The working end of the transducer can be poured according to the irregular surface of the test piece, and can be closely attached to high-temperature metal components with complex surfaces during detection, reducing eddy currents The lift-off of the coil and the excitation coil can enhance the eddy current strength and the static magnetic field strength in the material.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic ultrasonic nondestructive testing, and relates to an electromagnetic ultrasonic transducer, in particular to a high temperature resistant transverse wave electromagnetic ultrasonic transducer. Background technique [0002] In industries such as aerospace, petrochemical, metallurgical manufacturing, nuclear power and thermoelectricity, metal materials are often in an environment of 300 ~ 1200 ℃ during the process of production, processing and service. The structure and performance of metal materials that have been served under high-temperature conditions for a long time will change, resulting in major safety hazards in high-temperature components. Such as pipelines, pressure vessels, storage tanks and absorption pipes, which operate at high temperatures, may experience creep, thermomechanical fatigue or thermal corrosion. [0003] Due to the lack of suitable high-temperature couplants for ...

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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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