What is X-ray testing? Third party testing service organization

Date：2022-06-21 17:08:45Views：1194

X-ray has been widely used in industry as one of the five conventional detection methods in radiology. X-ray was first used in medical treatment to ensure the safety of human health. With the development of industry, X-ray is most commonly used in industrial nondestructive testing. Now it is mainly divided into high-tech industries such as electronic semiconductors and lithium new energy, as well as branches such as pan industrial nondestructive testing, public safety and foreign matter detection.

X-rays are very short wavelength electromagnetic waves and are photons. X-rays can penetrate substances that cannot be penetrated by ordinary visible light. The penetrability is related to the wavelength of X-ray, the density and thickness of penetrating material. The shorter the X-ray wavelength, the greater the penetration; The lower the density, the thinner the thickness, and the easier the X-ray penetration. When X-rays are absorbed by a substance, the molecules that make up the substance are broken down into positive and negative ions, which is called ionization. The number of ions is proportional to the amount of X-rays absorbed by the substance. The amount of X-rays can be calculated by measuring the degree of ionization of air or other substances.

The basic principle of X-ray image formation is due to the characteristics of X-ray and the difference of component density and thickness. At present, X-ray testing equipment can image in real time, which greatly improves the detection efficiency. It can also detect solder joints and internal damage of printed circuit boards, packaging components and connectors. Then, the computer further analyzes or observes the gray image formed by the X-ray absorption degree of different materials, so as to display the density distribution of the object and achieve the effect of defect detection.

In the BGA casting process, such as electronic components, BGA, electronic equipment components, LED components, metal composite materials and plastic materials, X-rays can be inspected, such as air welding. For example, the application of X-ray detection technology can accurately determine the defects, positions and sizes of cable connectors, improve the accuracy, quality and efficiency of fault detection, provide effective support cables for operation and development, and fully comply with the modernization of electric power. Therefore, in the cable structure fault detection stage, relevant personnel can determine the detection method through the advantages of X-ray, so as to improve the fault detection time and provide support for the stable operation of power companies.

What are the advantages of X-ray testing technology?

There is a powerful: because the wavelength of X-ray is relatively short and the energy is high, part of the material is absorbed by the material, and most of the gap is penetrated between atoms. Therefore, X-rays have strong penetration.

X-ray ionization: when the material is irradiated with X-rays, the charge of the internal electron offset of the original electron orbit is measured to achieve the purpose of fault detection.

X-ray fluorescence: due to the wavelength of X-ray, it is difficult to see with the naked eye, but some fluorescent reactions will occur when irradiating some compounds. For example, when irradiated, such as phosphorus and cyanide, visible light and ultraviolet light will occur, and the intensity of light is positively correlated with X-rays.

X-ray inspection technology can be divided into four applications: quality inspection, thickness measurement, article inspection and dynamic research. Quality inspection is widely used in casting, welding process defect detection, industry, lithium battery, electronic semiconductor field. Thickness measurement can be used for online, real-time, non-contact thickness measurement. Article inspection can be used for airport, station, customs inspection and determination of structural dimensions. Dynamic research can be used to study dynamic processes, such as trajectory, explosion, nuclear technology and casting technology.