High temperature casting and forging continuous detection electromagnetic ultrasonic probe, flaw detection device and flaw detection method

A continuous detection, electromagnetic ultrasonic technology, applied in the direction of measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., can solve the problem of continuous detection and low energy conversion efficiency of electromagnetic ultrasonic probes , high lift-off sensitivity and other issues, to achieve good heat insulation effect, reliable ceramic insulation, and reduce the lift-off distance

Active Publication Date: 2019-12-03
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention proposes an electromagnetic ultrasonic probe, a flaw detection device and a flaw detection method for continuous detection of high-temperature castings and forgings to solve the proble

Method used

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  • High temperature casting and forging continuous detection electromagnetic ultrasonic probe, flaw detection device and flaw detection method
  • High temperature casting and forging continuous detection electromagnetic ultrasonic probe, flaw detection device and flaw detection method
  • High temperature casting and forging continuous detection electromagnetic ultrasonic probe, flaw detection device and flaw detection method

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Embodiment 1

[0053] The specific embodiment of the present invention provides a casting and forging electromagnetic ultrasonic probe, such as Figure 1 to Figure 6 As shown, it includes a probe housing 9, a permanent magnet 1 arranged in the cavity of the probe housing 9, an excitation coil 3 and a receiving coil 4 arranged below the outer bottom of the probe housing 9, and the excitation coil 3 and the receiving coil 4 are wires A spiral coil structure wound parallel to the bottom of the probe housing 9, the wires are bundled into a cluster of 3 to 35 silver wires 11 uniformly coated with ceramic coating 10; a high temperature resistant Magnetic base 2, the central axis of the magnetic base 2 is perpendicular to the plane where the excitation coil 3 is located; the side wall of the probe housing 9 is provided with a number of water inlets 6 near the bottom, preferably two water inlets in the present embodiment, the described The top of the probe housing 9 is provided with a water outlet 7...

Embodiment 2

[0067] Such as Figure 8 As shown, the specific embodiment of the present invention provides an electromagnetic ultrasonic flaw detection device for continuous detection of high-temperature castings and forgings, including the above-mentioned probe, and a PC, an excitation circuit and a receiving circuit;

[0068] The excitation circuit comprises a DA signal generator, a power amplifier, and an excitation end impedance matching circuit connected in sequence, and the two ends of the excitation coil 3 of the probe are all connected with the excitation end impedance matching circuit;

[0069] Described receiving circuit comprises receiving end impedance matching circuit, preamplifier, filter and AD signal acquisition card connected successively, and the two ends of receiving coil 4 of described probe are all connected with described receiving end impedance matching circuit;

[0070] Both the DA signal generator and the AD signal acquisition card are connected to the PC.

[0071]...

Embodiment 3

[0073] The specific embodiment of the present invention provides a flaw detection method using the above-mentioned high-temperature casting and forging to continuously detect the electromagnetic ultrasonic flaw detection device, comprising the following steps:

[0074] A high-frequency, high-power sinusoidal pulse train current is fed into the excitation coil 3, and the high-frequency, high-power sinusoidal pulse train current signal generates pulsed eddy currents in the tested sample, and generates Lorentz force under the action of a bias magnetic field. Or the sinusoidal pulse current signal generates a high-frequency alternating magnetic field signal in the tested sample, which causes the surface of the tested sample to generate Lorentz force or magnetostrictive deformation, causing the surface of the tested sample to vibrate, thereby exciting the transverse wave ultrasonic. The upper surface of the tested sample propagates from top to bottom, that is, along the thickness di...

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Abstract

The invention discloses a high temperature casting and forging continuous detection electromagnetic ultrasonic probe, a flaw detection device and a flaw detection method. The casting and forging electromagnetic ultrasonic probe comprises a probe shell, a permanent magnet arranged in a cavity of the probe shell, and an exciting/receiving coil arranged at the lower side of the outer bottom of the probe shell, wherein the exciting/receiving coil is a spiral coil that is formed by a winding lead wire and parallel to the bottom of the probe shell, and the lead wire is formed by a plurality of silver wires uniformly painted with ceramic coating bound into a cluster; a magnetic base is arranged under the permanent magnet, and the central axis of the magnetic base is perpendicular to a plane wherethe exciting coil is located; a plurality of suction ports are formed, close to the bottom, of the side wall of the probe shell, a water inlet is formed in the top of the probe shell, and a water circulation and cooling channel is formed by a cavity among the probe shell, the permanent magnet and the magnetic base. Due to the three designs of the lead wire formed by the plurality of silver wiresuniformly painted with ceramic layers and the arrangement thereof, the magnetic base and water cooling, continuous detection on the 650 DEG C high-temperature castings and forgings can be achieved, energy conversion efficiency can be improved, lift-off sensitivity can be reduced, and a detection dead zone can be reduced.

Description

technical field [0001] The invention relates to the technical field of using electromagnetic ultrasonic body waves to continuously detect internal defects of high-temperature metal castings and forgings, in particular to an electromagnetic ultrasonic probe, flaw detection device and flaw detection method for continuous detection of high-temperature castings and forgings. Background technique [0002] With the accelerated development of China's industry, my country's demand for large castings and forgings is increasing day by day, and the quality requirements for large castings and forgings are also increasing. Non-destructive testing of castings and forgings under high temperature can detect defects as early as possible, monitor and control defects in real time, improve processing technology in real time according to defect information, and eliminate and suppress defects by increasing the degree of forging deformation. Defects that cannot be eliminated by increasing the forg...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/24
CPCG01N29/04G01N29/24G01N2291/0234
Inventor 石文泽陈巍巍卢超徐毅唐琴柴嘉荣王倩陈明
Owner NANCHANG HANGKONG UNIVERSITY
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