Method for detecting material hydrogen damage through ultrasonic surface waves

Abstract

The invention discloses a device and a method for detecting material hydrogen damage through ultrasonic surface waves. The device comprises high-frequency ultrasonic surface wave emitting and receiving probes, a substrate, a guide rail, locating nuts and a portable industrial personal computer, wherein the two probes are arranged on the guide rail at the middle of the substrate and are fixed by the locating nuts in a clamping manner, and the substrate is arranged on an apparatus or a material to be detected; and the portable industrial personal computer comprises a data collecting module, an emitting module, a signal processing module, a power amplifying module, an A / D (analog / digital) converting module, a signal generating module, a software control platform and connecting wires, and the portable industrial personal computer is used for operating and controlling. The method disclosed by the invention comprises the following steps: (1) applying the detecting device; (2) setting the software control platform; (3) generating ultrasonic surface waves; (4) propagating the ultrasonic surface waves and converting signals; (5) converting a voltage signal into a digital signal; and (6) detecting the hydrogen damage degree of the apparatus or material. The device is light, convenient to carry and capable of performing online nondestructive testing on hydrogenating and hydroreforming apparatuses and materials.

Description

technical field [0001] The invention relates to the technical field of non-destructive flaw detection of metal materials, in particular to a device and method for detecting hydrogen damage of (metal) materials by ultrasonic surface waves, especially a detection method for detecting early hydrogen damage of austenitic materials by ultrasonic surface waves. Background technique [0002] Hydrogen damage to metals includes hydrogen embrittlement, hydrogen bubbling, and hydrogen-induced cracking. Among them, hydrogen embrittlement can be recovered, while hydrogen bubbling and hydrogen-induced cracking are permanent. It is very important to evaluate the degree of hydrogen damage. At present, the method of evaluating the degree of hydrogen corrosion of metal materials usually adopts the method of material mechanical performance testing. Since this method is a destructive method, this method is not used for testing equipment in service. It is necessary to use non-destructive testing...

AI Technical Summary

Problems solved by technology

[0004] At present, the development of ultrasonic hydrogen damage detection technology mainly focuses on the detection method of body wave. losses will vary

If the body wave is used for characterization, the wall thickness of the material needs to be known, and the wall thickness of the material sometimes becomes thinner during use, which is not convenient for body wave detection

However, the method of longitudinal-to-short wave ratio can only be used to determine whether the material is seriously damaged by hydrogen or not, but it cannot be judged well for the initial stage of hydrogen damage of the material.

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