The introduction of fracture inspection
The fracture inspection is one of the methods to check the quality of steel pipeline products.
There are mainly the following fracture types: ductile fracture, brittle fracture, porcelain fracture, lamellar fracture, stony fracture, graphite fracture, etc. Besides, according to the different types of steel and inspection requirements, the fracture test sample should be subjected to different heat treatment before breaking. According to the different heat treatment methods, the fracture can be divided into: promoting fire fracture, annealing fracture, tempering fracture, etc.
The role of fracture inspection:
The broken test piece can be matched with the transverse low-power tissue to check the defects of the steel.The fracture can directly show white spots, inclusions, bubbles, internal cracks, residual shrinkage holes and other defects in steel.By identifying the size and characteristics of the grain on the fracture, the situation of overheating or overburning of steel can be determined, the fracture characteristics of steel can be determined and the fracture reason of steel can be judged.
Fracture inspection does not require any preparation of specimens, and can be directly observed and tested. Direct observation of these natural surfaces can be made to obtain direct data.It is suitable for parts and parts that are damaged in the process of use, as well as parts that are damaged due to some reason in the process of production and manufacturing.
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