Principle and application scope of Xray ray nondestructive testing technology

Date：2022-06-21 17:22:41Views：883

X-ray is a kind of strong penetrating ray, which can penetrate many opaque substances, such as wood, ink paper, etc. In the use of X-rays in industry, the penetrability of X-rays can be used to detect hard foreign bodies such as bones and plastics to various metal foreign bodies with higher sensitivity and stability, helping you to more effectively improve the quality of finished products.

When X-ray penetrates a substance, a series of extremely complex physical processes will occur due to the interaction between the ray and the substance. As a result, the ray will be absorbed and scattered and lose part of its energy, and the intensity will be weakened accordingly. This phenomenon is called ray attenuation.

The essence of X-ray flaw detection is to obtain the latent image generated by the defect projection on the photosensitive material (film) according to the difference in the intensity of rays transmitted through the workpiece due to the different attenuation of ray energy between the inspected workpiece and its internal defect medium. After the dark room processing, the defect image is obtained, and then the nature and negative film level of the internal defect of the workpiece are evaluated according to the standard.

The radiation range of X-ray flaw detection is generally 90mm-600mm.

X-rays are produced by high-speed electrons impacting the anode target in high vacuum. The maximum steel thickness that the X-ray emitted by the X-ray tube can penetrate is about 90mm, 230mm and 600mm respectively.

X-ray can accurately detect the internal defects of products and find the root cause of defects. For the penetrated product structure, X-ray images with black-and-white contrast and hierarchical differences can be obtained through the imaging process and display on the screen or TV screen.

X-rays are bremsstrahlung and characteristic radiation, which are caused by different firing principles. Bremsstrahlung refers to the radiation produced by the sudden deceleration of high-speed electrons. When a charged particle is decelerated by a Coulomb field, the lost kinetic energy will be converted into photons, which is the continuous spectrum produced by bremsstrahlung.

Nondestructive testing technology, i.e. non-destructive testing, is an inspection method used to obtain physical and chemical information about the content, nature or composition related to the quality of the substance to be tested without destroying the original state and chemical properties of the substance to be tested.

Nondestructive testing technology is widely used in automotive, scientific research, additive manufacturing, smart phones and other industrial fields. It can be used to detect the air bubble duty ratio of lithium battery SMT welding, IC packaging, IGBT semiconductor, LED light bar backlight, BGA chip detection, loose welding defect detection of die castings, nondestructive defect detection of internal structure of electronic industrial products, etc.

X-ray nondestructive testing is widely used in material testing, food testing, manufacturing, electrical appliances, instrumentation, electronics, auto parts, medicine, biology, archaeology, geology and other fields.

The above is the content related to X-ray nondestructive testing compiled by the core testing team. I hope it will be helpful to you. Shenzhen Chuangxin Online Testing Technology Co., Ltd. is a well-known professional testing institution for electronic components in China, with 3 standardized laboratories covering an area of more than 1000 square meters. The scope of testing services covers: testing and verification of electronic components, IC authenticity identification, material selection for product design, failure analysis, function testing, factory incoming material inspection, X-ray testing of components and parts, tape braiding and other testing items.