X-rays have a strong penetrating power and can penetrate through many substances that visible light cannot penetrate. So, using this characteristic of X-rays, engineers have developed a variety of X-ray non-destructive testing equipment.
Industrial CT is with the development of computer technology, combined with the X-Ray inspection program extended out of the new development direction. The so-called CT is a three-dimensional X-ray scanning, in the X-ray inspection, the object to be tested to do a 360 rotation, to collect each angle of the X-Ray inspection image, and then you need to use the computer computing to reconstruct the physical image of the object to be tested.
From this, we can see that X-ray inspection results in a two-dimensional image, while industrial CT makes full use of computer technology to reconstruct the two-dimensional image of each surface into a three-dimensional image, and at the same time restore the internal structure of the object. Technically speaking: CT tomography is the best means of non-destructive testing and non-destructive evaluation of products. Industrial CT utilizes tomography to achieve non-destructive visualization of products for measurement, assembly defects and material analysis, free from the obscuring of surrounding detailed features, and can directly obtain the spatial location, shape, and dimensional information of the target features.
X-ray inspection program can be more intuitive to show the size and shape of defects within the workpiece, and therefore easy to determine the nature of the defects, and storage of inspection data, easy to find and trace. X-Ray inspection of thin-walled workpiece non-destructive flaw detection sensitivity is high, sensitive to volumetric defects, the defects of the image of the plane of the distribution of the real, the size of the measurement is accurate. There is no strict requirement on the surface finish of the workpiece, the material grain size does not have much impact on the test results, can be applied to a variety of internal defects in the material detection, so it is widely used in the welding quality inspection of pressure vessels.
X-ray inspection of thick-walled workpiece detection sensitivity is low, more suitable for the detection of porosity, slag, shrinkage, loose and other volumetric defects. Industrial CT is more likely to find angle welding, T-joints and other gap is very small cracks and unfused defects, as well as forgings, tubes, bars and other profiles of the internal layering defects.
Enterprises can choose X-ray nondestructive testing equipment according to the actual detection needs, industrial CT detection defects location, size, size is more accurate, suitable for high-precision product testing needs, to help improve the product process, in the research and development stage has an important role in assisting the X-Ray inspection is more often applied to conventional production enterprises, in the production line to distinguish between the defective products, online automated inspection to improve the efficiency and accuracy of work. The X-Ray inspection is more commonly used in conventional manufacturing companies to distinguish defective products on the production line, and online automated inspection to improve work efficiency and accuracy.