Study on the Penetration Theory of Flaw
نویسندگان
چکیده
In the field of commercial manufacture, the permeation flaw detection is always used to inspect the surface quality of production. In conventional permeation flaw detection, the fluorescence or none fluorescence penetrant infiltrate the surface of the work and the developed image is used for flaw detection. The infiltration capacity of penetrant is very important to permeation flaw detection. If the flaw of the work isn’t infiltrated by the penetrant adequately, the permeation flaw detection will not work well. In this paper, the penetration theory of flaw is analyzed. The influential factors of infiltration capacity are discussed. The expression of the infiltration rate of capillary liquid column and the expression of the penetrant climb of flaw model are deducted. We have observed that, besides the physical property of material, the infiltration capacity of penetrant has a relationship with the atmosphere, the depth, width, spatial location of the flaw and whether the flaw is breakthrough. The conclusions of this paper are beneficial to improve the sensitivity of the permeation flaw detection.
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