Nondestructive evaluation of carburized layer depth in furnace tubes of Cr35Ni45NbMA using magnetic field distortion and magnetic attraction force measurement methods

•The detection ability of MFD and MAF has been investigated when there were both inner and outer carburized layers in the furnace tube.•MFD could be used to accurately evaluate the depth of the outer carburized layer.•The parabolic dependency of the outer carburized layer depth on MFD and MAF was fo...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2022-03, Vol.191, p.110845, Article 110845
Main Authors: Li, Hengtao, Wu, Bin, Tang, Ruiqi, Wang, Yujue, Liu, Xiucheng, He, Cunfu
Format: Article
Language:English
Subjects:
Carburized layer depth
Carburizing
Distortion
Experiments
Force measurement
Furnace tube
MAF
Magnetic fields
Magnetism
Measurement methods
MFD
Nondestructive testing
Sensors
Surface roughness
Tubes
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Summary:•The detection ability of MFD and MAF has been investigated when there were both inner and outer carburized layers in the furnace tube.•MFD could be used to accurately evaluate the depth of the outer carburized layer.•The parabolic dependency of the outer carburized layer depth on MFD and MAF was found.•The PSD of the MAF sensor could be used for qualitative evaluation depth of the inner carburized layer. The ability of magnetic field distortion (MFD) and magnetic attractive force (MAF) sensors to detect both the inner and outer carburized layers of the furnace tube was investigated in the study. They were employed for quantitative nondestructive evaluation of carburized layer depth in furnace tubes of Cr35Ni45NbMA. It was found that the carburized layer on the outer surface had the dominant effect on the responses of MFD and MAF sensors compared to the carburized layer on the inner surface. Parabolic dependency of the responses of MFD and MAF sensors on the carburized layer at the outer surface was concluded. The accuracy of the proposed sensors was verified by experiments. It was found that MFD sensor was more suitable for the detection of the outer carburized layer of furnace tube than MAF sensor, while PSD obtained by MAF could be used for qualitative evaluation of the depth of inner carburized layer.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2022.110845