Discussion on matters needing attention in the process of flaw detection

Abstract:

Rail defects are easy to threaten the stability and safety of train operation, so it is necessary to do a good job of detection, so as to accurately judge the quality situation, so as to take measures to deal with the defects. At present, ultrasonic technology as a non-destructive testing technology, has been widely used, it can complete the testing work in a more convenient way, and the obtained results are accurate, short operation time, has the feasibility.

Welding quality is directly related to the quality and safety of engineering construction. In order to meet the needs of railway construction, transportation and convenient use, steel structure welding will be adopted to become a 50m-200m long rail. Therefore, it is necessary to clarify the technical requirements of non-destructive testing and relevant matters need to be paid attention to in the application process, and rational use of calibration instruments.

Inspection process and precautions:

1. Scanning speed and strength

Moving speed within 10m/s is appropriate, if the speed exceeds the value, it is easy to miss the detection; In addition, appropriate pressure should be applied to the probe to ensure that the detection sensitivity can be maintained within a reasonable range to avoid sensitivity instability.

2. Adjustment of flaw detection sensitivity

The adjustment work should be completed before the formal inspection. After setting the sensitivity reasonably, it is helpful to improve the damage detection rate.

3. Width of flaw detection scan

In the work of rail weld inspection, full width scanning should be done to ensure the accuracy of the results.

4. Analysis echo display

In order to determine the defect wave and welding rib wave, the display law of inside and outside welding rib wave should be accurately judged, and the similarities and differences should be judged.

With the rapid social development, our economic development momentum is good. At present, railway transportation is a common way of travel in people's life. The travel safety of railway transportation is directly related to the personal and property safety of many passengers and related staff. To ensure the safe operation of railway traffic, it is necessary to pay attention to the damage and influence of lightning on railway signal equipment. Therefore, we should strengthen the effective treatment and prevention of lightning strike fault of railway signal equipment, prevent traffic accidents, and enhance the smooth running of railway.