Non-destructive testing is to use the acoustic, optical, electromagnetic and electrical characteristics of substances to detect whether there are defects or inhomogeneities in the detected objects without damaging or affecting their performance, and to provide information such as size, length and length. Location, nature and quantity of defects.
Non-destructive testing methods mainly include: visual testing, radiography, ultrasonic testing, magnetic particle testing, penetrant testing, eddy current testing, ultrasonic diffraction time difference method, unconventional testing methods and so on. Not only can the raw materials, intermediate processes and final products used in production be inspected, but also the equipment in use can be inspected.
Extended data
Non-destructive testing is non-destructive, because it will not damage the performance of the detected object; It is comprehensive, because the detection is non-destructive, so when necessary, it can carry out 100% total detection on the tested object and pass the destructive detection; It has the whole process, and destructive testing is general.
Non-destructive testing is suitable for testing raw materials such as stretching, compression and bending commonly used in mechanical engineering. Destructive testing of raw materials used in production. For finished products and articles, unless they are not ready to continue to be used, nondestructive destructive tests cannot be carried out. Test the performance of the object.
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