1 Forging large cutting surface (testing non-metal assimilation, grain size)
2 high stress parts of the part (test assimilation, grain size, overheating)
3 Forgings are intensely deformed and the temperature rises to the extreme (testing overheat and grain size)
4 aluminum alloy forgings are tested for overheating and over-burning. They should be sampled on their small cuts and close to their appearance.
For the non-destructive testing of liberation forgings, it is necessary to use ultrasonic flaw detection. Some forgings can also be used for non-destructive testing such as fluorescence penetration, magnetic powder penetration, and X-ray after roughing. Ultrasonic testing is divided into two types: comprehensive inspection and partial inspection. Partition inspection is a standard attempt to adopt differential sensitivity levels on different parts of the forging. The division of the area shall be in accordance with the requirements of the part drawings and shall be responsive in the forging drawings.