Creeping-wave fault detecting probe and creeping wave fault detecting method

A creeping wave and amplitude technology, applied in the field of non-destructive testing to improve the ability to find defects

Inactive Publication Date: 2012-12-26
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the creeping wave propagates, most of the energy is mainly concentrated in a certain range under the surface, and unlike the surface wave, it is not sensitive to the surface roughness of the workpiece, so the creeping wave detection method can detect cracks under the rough surface , but none of the current creeping wave probes can perform creeping wave detection accurately

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  • Creeping-wave fault detecting probe and creeping wave fault detecting method
  • Creeping-wave fault detecting probe and creeping wave fault detecting method
  • Creeping-wave fault detecting probe and creeping wave fault detecting method

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Embodiment Construction

[0035] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0036] Such as Figure 1 to Figure 4 As shown, as one aspect of the present invention, a probe 100 for creeping wave flaw detection is provided. The probe 100 includes a housing 60 with an opening, a wafer 10 and a protective layer 20. The wafer 10 is arranged inside the housing 60 for protection. The layer 20 is fixedly connected to the housing 60 at the opening of the housing 60, and the housing 60 is closed. One end surface of the protective layer 20 is bonded to the wafer 10 and the protective layer 20 is fixedly connected to the wafer 10, and the other end surface It is used to conform to the surface of the object to be measured, wherein the shape of the o...

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Abstract

The invention discloses a creeping-wave fault detecting probe. The probe comprises a shell body (60) provided with an opening, crystal plates (10) and a protection layer (20). The crystal plates are arranged inside the shell body. The protection layer is arranged at the opening of the shell body and seals the shell body up. One end face of the protection layer is attached to the crystal plates and the protection layer is fixedly connected with the crystal plates. The other end face of the protection layer is used for being attached to an object to be detected. The shape of the other end face of the protection layer is matched with the shape of the surface of the object to be detected. The invention further discloses a creeping-wave fault detecting method. When the creeping-wave fault detecting probe is used for creeping-wave fault detecting, the surface of the protection layer of the probe can be attached to the object to be detected so that the majority of ultrasonic waves generated by the crystal plates can penetrate through the protection layer and enter the inside of the object to be detected. Consequently, capacity of detecting faults of the probe in the process of creeping-wave fault detecting is improved.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a probe for creeping wave flaw detection and a creeping wave flaw detection method for flaw detection of objects using the probe. Background technique [0002] High-temperature fastening bolts are important parts of thermal power equipment in thermal power plants. In long-term operation, due to the effect of high temperature and high stress, the bolt material is prone to thermal embrittlement, creep, fatigue, and stress corrosion; due to excessive pre-tightening force and inadvertent burning of the center hole during installation, the bolt material is prone to cracks . In order to ensure the safe operation of equipment, it is very important to strengthen the effective inspection of high-temperature fastening bolts. [0003] At present, small-angle longitudinal wave detection methods, shear wave detection methods and creeping wave detection methods are often used to test w...

Claims

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Application Information

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IPC IPC(8): G01N29/24G01N29/04G01N29/30
Inventor 王维东张允超
Owner CHINA SHENHUA ENERGY CO LTD
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