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Phased array ultrasonic detection and evaluation method for welding seam of aluminum alloy special-shaped structure

A technology for ultrasonic testing and structural welds, applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, use sound waves/ultrasonic waves/infrasonic waves for material analysis, and measurement devices, etc. To meet the needs of on-site testing, meet the needs of on-site testing and quality control of products, and achieve high economic and social benefits

Pending Publication Date: 2022-03-15
INNER MONGOLIA NORTH HEAVY INDS GROUP
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Problems solved by technology

[0005] The purpose of the present invention is to provide a phased array ultrasonic detection and evaluation method for aluminum alloy special-shaped structure welds, which can realize the comprehensive and effective detection and quality classification evaluation of non-full penetration special-shaped structure welds, and solve the problem of complex non-full penetration special-shaped structures Solve the technical problems of ultrasonic testing of welds to meet the needs of on-site product testing and quality control

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  • Phased array ultrasonic detection and evaluation method for welding seam of aluminum alloy special-shaped structure
  • Phased array ultrasonic detection and evaluation method for welding seam of aluminum alloy special-shaped structure
  • Phased array ultrasonic detection and evaluation method for welding seam of aluminum alloy special-shaped structure

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[0102] A-scan display feature description: the echo amplitude is relatively high, generally similar to unfused; the waveform is similar to cracks; for special-shaped welds, due to the limitation of the display mode of the instrument, it is generally impossible to obtain the structural waves of special-shaped welds and unwelded seams on the fluorescent screen at the same time Penetrating defect waves.

[0103]Full-focus display feature description: The image has regular shape, fixed position, and is located at the root of the weld; it is difficult to distinguish from the non-penetrated structure of the special-shaped weld itself. When its own height is not less than 3mm, the diffraction signals of the upper and lower endpoints can be seen.

[0104] Step 3: After the evaluation of the nature of the defect is completed, use the special comparison test block for special-shaped welds to evaluate the position and size of the defect;

[0105] 1. Defect location and size assessment

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Abstract

The invention discloses an aluminum alloy special-shaped structure welding seam phased array ultrasonic detection evaluation method. The method comprises the following steps: detecting a welding seam of a special-shaped structure by utilizing an ultrasonic phased array full-focusing detection technology; when the defect is detected, comparing the detected defect according to a qualitative criterion and a comparison map, and evaluating the property of the defect; evaluating the position and the size of the defect according to a position and size evaluation method; and performing quality grading evaluation on the defects according to a quality grading evaluation method. According to the method, comprehensive and effective detection and quality grading evaluation of the non-full penetration special-shaped structure welding seam can be realized, the technical problem of ultrasonic detection of the complex non-full penetration special-shaped structure welding seam is solved, and the requirements of product field detection and quality control are met.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic testing, and in particular relates to a phased array ultrasonic testing and evaluation method for welding seams of aluminum alloy special-shaped structures. Background technique [0002] Definition of TCG: TCG curve is a depth compensation curve. Use the downward trend of DAC curve along the depth direction to compensate the reflected echo amplitude at different depths, and connect all depth compensation values ​​into a curve. This curve is the TCG curve. TCG function: After the TCG function performs depth compensation on the A-scan echo amplitude, the echo amplitude of the same size reflector has nothing to do with its depth in the tested material. Therefore, in TCG mode, when the gain condition of the flaw detector remains unchanged, it is more beneficial to find defects located in deeper positions inside the material. [0003] The frame structure is welded by aluminum alloy plates of differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/30
CPCG01N29/04G01N29/30G01N2291/0234G01N2291/2675
Inventor 毛月娟王海岭陈沅沅韩文燕苗逢春赵存兵孙思昳陈霆霆袁波
Owner INNER MONGOLIA NORTH HEAVY INDS GROUP
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