Ultrasonic flaw detection is one of the important means of quality inspection of flange forgings of petrochemical ring parts. However, in practical applications, the sensitivity of ultrasonic detection is often affected by many factors, such as material composition, organizational structure, surface roughness and so on. In order to improve the sensitivity of ultrasonic flaw detection, this paper will introduce the method to improve the sensitivity of ultrasonic flaw detection for flange forgings of petrochemical ring.
Ultrasonic flaw detection is to use the propagation characteristics of ultrasonic waves in the object, by receiving and analyzing the reflected echo signal to determine whether there are defects in the object. When the ultrasonic wave encounters a defect, it produces a reflected echo, and the amplitude and frequency of the echo are related to the shape, size and depth of the defect. By processing and analyzing the echo signal, the location, size and nature of the defect can be determined.
Factors influencing ultrasonic flaw detection sensitivity
Material composition: Different material composition has different effects on the ultrasonic propagation speed and attenuation coefficient, which affects the sensitivity of ultrasonic detection.
Organizational structure: The organizational structure of the material also has an impact on the propagation of ultrasonic waves, such as grain size, grain boundary morphology, etc.
Surface roughness: Surface roughness has a great impact on the reflection and scattering of ultrasonic waves, which affects the sensitivity of ultrasonic detection.
Probe performance: The performance of the probe also has an important impact on the sensitivity of ultrasonic detection, including the probe frequency, bandwidth, focal length, etc.
Ultrasonic detection sensitivity enhancement method
Select the right probe: According to the nature of the material being tested and the characteristics of the defect, select the right probe type and parameters to improve the sensitivity of ultrasonic detection.
Optimize the scanning speed: By adjusting the scanning speed, you can control the propagation time of the ultrasonic wave in the object, thereby reducing signal attenuation and interference, and improving the sensitivity of the ultrasonic flaw detection.
Improved signal processing technology: By improving signal processing technology, such as filtering, gain control, etc., noise interference can be reduced, and the signal-to-noise ratio and sensitivity of ultrasonic detection can be improved.
Improve the accuracy of the instrument: by improving the accuracy and stability of the instrument, the measurement error and interference can be reduced, and the sensitivity of ultrasonic detection can be improved.
Training operators: By training operators and improving their skill level and operation standardization, the influence of human factors on ultrasonic detection can be reduced and its sensitivity can be improved.
Through the research and practice of ultrasonic flaw detection sensitivity of flange forgings of petrochemical ring, it can be found that selecting appropriate probe, optimizing scanning speed, improving signal processing technology, improving instrument accuracy and training operators can effectively improve the sensitivity of ultrasonic flaw detection. The application of these methods is helpful to improve the quality inspection level and production efficiency of flange forgings of petrochemical ring parts. Therefore, in the actual production process, we should actively promote and apply these methods to create greater economic and social benefits for enterprises. At the same time, with the continuous progress of science and technology and the constant change of market demand, ultrasonic inspection technology should also be constantly updated and improved to meet the new development needs.
