What are the broad application fields of X-ray in nondestructive testing?

Date：2021-08-16 16:51:00Views：1526

With the rapid development of modern industry and the working status of high temperature, high pressure, high speed and high load, nondestructive testing technology has become the rigid demand of modern industry. As the name implies, "nondestructive" will not damage the test piece during the testing process. Its biggest feature is that it can be tested without damaging the material and structure of the test piece. Therefore, the use of nondestructive testing can implement 100% full product inspection to ensure production quality. Nondestructive testing refers to the use of changes in heat, sound, light and reaction caused by abnormal or defective internal structure of materials, such as electricity, magnetism, physical or chemical methods, with the help of modern and equipment, surface and internal structure of samples, properties, status and defect types of inspection and test methods Nature, quantity, shape, location, size, distribution and change.

Since the 1980s, the world's major industrialized countries have applied X-ray or gamma ray ICT to nondestructive testing in the fields of aviation, aviation, military, metallurgy, machinery, petroleum, electric power, geology, archaeology and so on. In the 1990s, China also gradually applied ICT technology to the field of industrial nondestructive testing. Online nondestructive testing can be applied in industrial production, which can improve the measurement object of rolling accuracy, carry out real-time testing, timely adjust production equipment, ensure the production of more high-quality rolling materials, effectively improve the production efficiency and qualification rate of enterprises, and bring economic benefits to enterprises at the same time.

With the pace of progress, X-ray testing technology is also constantly improving. Its products have been widely recognized and tested by the market in terms of testing performance and safety. At present, there are four commonly used nondestructive testing methods: RT (radiographic inspection), UT (ultrasonic testing), MT (magnetic particle testing) and Pt (liquid penetrant testing). As far as the development trend is concerned, it should be led by radiographic inspection ， In particular, X-ray real-time imaging detection technology, 2D and 3D technology are becoming more and more mature. Two-dimensional tomography and three-dimensional are characterized by high detection accuracy and fast speed.

The global NDT equipment market is subdivided according to various NDT technologies, including ultrasonic testing, radiographic testing, electromagnetic testing, visual testing and other testing technologies (including magnetic particle testing and penetrant testing). Ultrasonic testing related equipment occupies a leading position in the market. The main factor driving the growth of ultrasonic testing equipment market is its wide application in steel and aluminum, construction, manufacturing, aerospace, national defense and automotive industries.

The most basic requirement of nondestructive testing technology is that it will not affect and damage the use object in the process of applying nondestructive testing technology. It mainly uses the electromagnetic, optical, acoustic and other principles of the object to detect the defects of equipment, parts and materials. In the specific testing process, it is necessary to adopt appropriate technology according to the product standards, technical specifications and various parameters of the object, It will not damage the tested object and has the characteristics of reliability and comprehensiveness. It can not only effectively improve the detection efficiency, but also effectively ensure the safety of pressure vessel operation.

The production and manufacture of nondestructive testing instruments in China still have a large development space in meeting more updated nondestructive testing requirements, especially the equipment suitable for the application of new nondestructive testing technology, such as nondestructive testing in the field of concrete structure, underwater nondestructive testing, nondestructive testing of urban underground pipelines, etc. Steel casting cracks, steel casting welding, pressure vessels, vehicle welding, etc. can be detected by X-ray nondestructive testing. The detection efficiency is not only high, but also very time-saving and labor-saving. The universality of X-ray testing has established the position of nondestructive testing in the testing industry.