Abstract
The infrared non-destructive testing (NDT) is widely applied in inspecting inner defects of different products as the development of infrared technology. In this paper, by establishing model of the steel product with different defects, the three dimensional heat conduction behavior simulation of Infrared Flash Thermography to detect blowhole defects in the steel products is carried out by using finite element analysis software ANSYS. Then, the surface temperature distribution is calculated and cloud maps of the surface temperature can be obtained in heating and cooling processing. The emphasis is placed on the relationship between the ratio of width to depth (L/H) and the surface temperature characteristic. The work is valuable for analyzing blowhole defects in the steel products qualitatively and semi-quantitatively.
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