Affiliations: [a] Department of Informatics and Mechanical Engineering, Toba College, National Institute of Technology (KOSEN), Toba, Mie, Japan | [b] Department of Innovative Engineering, Faculty of Science and Technology, Oita University, Oita, Japan
Correspondence:
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Corresponding author: Saijiro Yoshioka, National Institute of Technology (KOSEN), Toba College, 517-8501, Ikegami-cho, Toba, Mie, Japan. E-mail: [email protected]
Abstract: In recent years, the necessity for inspection of the deteriorated oil-refining plant is increased. In the steel tube to be used in a heating furnace has carburizing phenomenon is the cause of the accident. As these carburizing depths increase, so does the steel tube. Therefore, inspection of these depths is important. Therefore, studies are being conducted to determine the life of steel tube by applying electromagnetic non-destructive inspection electromagnetic. However, it is difficult to put it to practical use in the field because measurement error occurs due to the effect of lift-off. In this paper, we proposed an inspection method that can measure carburizing depth and lift-off at the same time. This method uses two types of search coil. One is the magnetic flux testing and the other is the eddy current testing.
Keywords: Oil-refining plant, carburization depth, cementite, non-destructive inspection, magnetic flux testing, eddy current testing
