Non-destructive testing

Non-destructive testing uses the characteristics of sound, light, magnetism and electricity to detect whether there are defects or unevenness in parts without damaging or affecting the performance of the object being tested, and gives the size, location, performance and performance of the defects. The general term for all technical means to determine the technical status of the inspected object based on quantity and other information. Inspection Items
Ray Inspection
A method that uses the attenuation characteristics of rays when penetrating materials to detect discontinuities (defects) in the inspected object and record and realize its image. According to different ray (or radiation) sources, ray detection can be divided into methods such as ray detection, mm ray detection, neutron ray detection, proton ray detection and electronic radiation detection.
Ultrasonic testing
A method of determining defects in the inspected object by using the propagation, reflection, attenuation and other characteristics of high-frequency sound waves (> Hz) that humans cannot feel in the inspected object.
Magnetic Particle Inspection
After the object to be inspected is magnetized in a magnetic field, a leakage magnetic field is generated at the defective part. Magnetic powder is sprinkled on the surface of the object to be inspected. The magnetic powder adheres to the defective part, thereby showing defects. Magnetic particle testing is only suitable for ferromagnetic materials. When the thickness of the non-magnetic coating on the ferromagnetic material is less than m, it has little effect on the sensitivity of magnetic particle detection. The length direction of the defect being perpendicular to the direction of the magnetic field is an important condition for magnetic particle testing.
Penetrant testing
The penetrant applied to the object to be inspected penetrates into the surface defects of the object to be inspected by capillary action. After cleaning the object to be inspected, a developer is used to suck out the penetrant remaining in the defects, thereby Display the shape and location of defects with fluorescence or [prohibited words] images. The ability of the penetrant to penetrate defects is related to the surface tension of the penetrant, the wetting effect of the penetrant on the solid, the shape and size of the defects, and the viscosity of the penetrant.
Testing equipment
Ray flaw detector, ultrasonic flaw detector, magnetic particle flaw detector, etc.
Testing Standards
Testing Items
Testing Standards
Radiographic Testing
, , , , ,
Ultrasonic Testing
, , , ,/ M,
Magnetic particle testing
,,,
Penetrant testing
,,,