Advances in Computational Design

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Magnetic field distribution in steel objects with different properties of hardened layer

  • Byzov, A.V. (Department of nondestructive testing, M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences) ;
  • Ksenofontov, D.G. (Department of nondestructive testing, M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences) ;
  • Kostin, V.N. (Department of nondestructive testing, M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences) ;
  • Vasilenko, O.N. (Department of nondestructive testing, M.N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences)
  • Received : 2021.07.23
  • Accepted : 2021.10.15
  • Published : 2022.01.25
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Abstract

A simulation study of the distribution of magnetic flux induced by a U-shaped electromagnet into a two-layer massive object with variations in the depth and properties of the surface layer has been carried out. It has been established that the hardened surface layer "pushes" the magnetic flux into the bulk of the magnetized object and the magnetic flux penetration depth monotonically increases with increasing thickness of the hardened layer. A change in the thickness and magnetic properties of the surface layer leads to a redistribution of magnetic fluxes passing between the poles of the electromagnet along with the layer and the bulk of the steel object. In this case, the change in the layer thickness significantly affects the magnitude of the tangential component of the field on the surface of the object in the interpolar space, and the change in the properties of the layer affects the magnitude of the magnetic flux in the magnetic "transducer-object" circuit. This difference in magnetic parameters can be used for selective testing of the surface hardening quality. It has been shown that the hardened layer pushes the magnetic flux into the depth of the magnetized object. The nominal depth of penetration of the flow monotonically increases with an increase in the thickness of the hardened layer.

Keywords

Acknowledgement

The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (topic "Diagnostics", No. AAAA-A18-118020690196-3). D. Ksenofontov and A. Byzov are grateful to the M.N. Mikheev Institute of Metal Physics for support of their work on the state order of the Ministry of Education and Science of Russia on the topic "Diagnostics", which was carried out within the framework of the youth project of the IMP UB RAS No. 22-21/mol.

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