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A non-destructive testing method

A technology of non-destructive testing and calendering, which is applied in the direction of measuring devices, test sample preparation, instruments, etc., can solve the problems of low detection accuracy and efficiency, and achieve the effects of improving detection efficiency, product quality, and detection accuracy

Inactive Publication Date: 2020-11-27
CNPC TUBULAR GOODS RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low detection accuracy and efficiency in existing ultrasonic non-destructive testing methods, the present invention provides a non-destructive testing method with high detection accuracy and efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A non-destructive testing method comprising the steps of:

[0028] A. Polish and grind the surface of the metal plate to be tested until the metallic luster is exposed;

[0029] B. Decontaminate and clean the surface of the treated metal plate, and then place it in a ventilated place to dry until there is no water dripping down;

[0030] C. Put the metal plate treated in step B into an 80°C constant temperature drying oven for constant temperature drying. The drying time is 30 minutes, and then take it out and cool it to room temperature for inspection;

[0031] D. Select ultrasonic transverse wave straight probe and longitudinal wave straight probe to detect and calibrate sound velocity, zero offset and K value;

[0032] E. Put the ultrasonic longitudinal wave straight probe perpendicular to the rolling direction of the metal plate, apply coupling agent on the surface of the metal plate to be tested, scan back and forth on parallel lines with a distance of 100mm, and ...

Embodiment 2

[0041] A non-destructive testing method comprising the steps of:

[0042] A. Polish and grind the surface of the metal plate to be tested until the metallic luster is exposed;

[0043] B. Decontaminate and clean the surface of the treated metal plate, and then place it in a ventilated place to dry until there is no water dripping down;

[0044] C. Put the metal plate treated in step B into an 80°C constant temperature drying oven for constant temperature drying. The drying time is 30 minutes, and then take it out and cool it to room temperature for inspection;

[0045] D. Select ultrasonic transverse wave straight probe and longitudinal wave straight probe to detect and calibrate sound velocity, zero offset and K value;

[0046] E. Put the ultrasonic longitudinal wave straight probe perpendicular to the rolling direction of the metal plate, apply coupling agent on the surface of the metal plate to be tested, scan back and forth on parallel lines with a distance of 300mm, and ...

Embodiment 3

[0055] A non-destructive testing method comprising the steps of:

[0056] A. Polish and grind the surface of the metal plate to be tested until the metallic luster is exposed;

[0057]B. Decontaminate and clean the surface of the treated metal plate, and then place it in a ventilated place to dry until there is no water dripping down;

[0058] C. Put the metal plate treated in step B into an 80°C constant temperature drying oven for constant temperature drying. The drying time is 30 minutes, and then take it out and cool it to room temperature for inspection;

[0059] D. Select ultrasonic transverse wave straight probe and longitudinal wave straight probe to detect and calibrate sound velocity, zero offset and K value;

[0060] E. Put the ultrasonic longitudinal wave straight probe perpendicular to the rolling direction of the metal plate, apply coupling agent on the surface of the metal plate to be tested, scan back and forth on parallel lines with a distance of 150mm, and s...

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PUM

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Abstract

The invention discloses a non-destructive detection method. The method comprises A. polishing the surface of a metal plate to be detected and grinding the surface of the metal plate, B. cleaning the surface of the treated metal plate, C. drying the treated metal plate at a constant temperature, taking out the metal plate and cooling the metal plate to the room temperature for detection, D. selecting an ultrasonic transverse wave straight probe and an ultrasonic longitudinal wave straight probe, E. carrying out scanning back and forth in the parallel lines through the ultrasonic longitudinal wave straight probe along a direction perpendicular to the calendaring direction of the metal plate, F. carrying out scanning back and forth in the parallel lines through the ultrasonic transverse wavestraight probe along a direction parallel to the calendaring direction of the metal plate, G. carrying out scanning back and forth in the parallel lines through the ultrasonic transverse wave straightprobe along a direction perpendicular to the calendaring direction of the metal plate and H. determining the defects to be detected. The method realizes all-directional non-destructive detection on the metal plate, can detect defect positions, shapes and sizes and can improve the detection accuracy and the detection efficiency.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a nondestructive testing method. Background technique [0002] Non-destructive testing technology is non-destructive testing, which is the inspection used to obtain physical and chemical information related to the quality of the test substance, such as content, properties or components, without destroying the original state and chemical properties of the test substance. Methods, commonly used non-destructive testing methods include radiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT) and liquid penetrant testing (PT). Other non-destructive testing methods include eddy current testing (ET), acoustic emission testing (AT), Thermal / Infrared (TIR), Leak Test (LT), AC Field Measurement Technology (ACFMT), Magnetic Flux Leakage (MFL), Far Field Test Method (RFT), etc. [0003] Ultrasonic flaw detector is a portable industrial non-destructiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N1/32
CPCG01N1/32G01N29/048G01N2291/0234
Inventor 姚欢刘琰冯挺来建刚曹峰赵森苏杭
Owner CNPC TUBULAR GOODS RES INST
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