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Electromagnetic Ultrasonic Probe, Flaw Detection Device and Flaw Detection Method for Continuous Inspection of High Temperature Casting and Forgings

A technology of continuous detection and electromagnetic ultrasound, which is applied in measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, and using sound waves/ultrasonic waves/infrasonic waves for material analysis. , high lift-off sensitivity and other issues, to achieve good heat insulation effect, increase distance, and reduce lift-off distance

Active Publication Date: 2022-06-21
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 problems of high lift-off sensitivity, low energy conversion efficiency of electromagnetic ultrasonic probes and inability to achieve continuous detection at a high temperature of 650°C in related technologies. question

Method used

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  • Electromagnetic Ultrasonic Probe, Flaw Detection Device and Flaw Detection Method for Continuous Inspection of High Temperature Casting and Forgings
  • Electromagnetic Ultrasonic Probe, Flaw Detection Device and Flaw Detection Method for Continuous Inspection of High Temperature Casting and Forgings
  • Electromagnetic Ultrasonic Probe, Flaw Detection Device and Flaw Detection Method for Continuous Inspection of High Temperature Casting and Forgings

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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, including the probe housing 9, the permanent magnet 1 arranged in the cavity of the probe housing 9, the excitation coil 3 and the receiving coil 4 arranged under the outer bottom of the probe housing 9, the excitation coil 3 and the receiving coil 4 are both wires The spiral coil structure wound parallel to the bottom of the probe housing 9, the wire is made up of 3 to 35 silver wires 11 uniformly coated with the ceramic coating 10 bundled into a cluster; the permanent magnet 1 is provided with 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 suction ports 6 near the bottom. The top of the probe housing 9 is provided with a water outlet 7 , a...

Embodiment 2

[0067] like 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, as well as a PC, an excitation circuit and a receiving circuit;

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

[0069] The receiving circuit includes a receiving end impedance matching circuit, a preamplifier, a filter and an AD signal acquisition card connected in sequence, and both ends of the receiving coil 4 of the probe are connected to the receiving end impedance matching circuit;

[0070] The DA signal generator and the AD signal acquisition card are all connected with the PC.

[0071] The DA signal genera...

Embodiment 3

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

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

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Abstract

The invention discloses an electromagnetic ultrasonic probe, a flaw detection device and a flaw detection method for continuous detection of high-temperature castings and forgings. The electromagnetic ultrasonic probe of castings and forgings includes a probe shell, a permanent magnet arranged in the cavity of the probe shell, and an excitation / reception set under the outer bottom of the probe shell. Coils and excitation / receiving coils are spiral coils parallel to the bottom of the probe shell wound by wires. The wires are bundled into a cluster of silver wires evenly coated with ceramic coating; there is a magnetic base under the permanent magnet. The central axis is perpendicular to the plane where the excitation coil is located; the side wall of the probe housing is provided with a number of water inlets near the bottom, and the top of the probe housing is provided with a water inlet. The cavity between the probe housing, the permanent magnet and the magnetic base forms a water circulation cooling channel. Multiple strands of silver wires evenly coated with a ceramic layer are made of wires and their layout, magnetic base and water cooling, which enable it to achieve continuous testing of high-temperature castings and forgings at 650°C, and improve energy conversion efficiency, reduce lift-off sensitivity and reduce Detect blind spots.

Description

technical field [0001] The invention relates to the technical field of continuously detecting internal defects of high-temperature metal castings and forgings by using electromagnetic ultrasonic bulk waves, in particular to an electromagnetic ultrasonic probe, a flaw detection device and a 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 at high temperature can detect defects as early as possible, monitor and control defects in real time, and 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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