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Article Dans Une Revue Journal of Magnetism and Magnetic Materials Année : 2021

Magnetic ageing investigation of bulk low-carbon silicon steel

Résumé

In this paper, the magnetic ageing of a bulk forged non-annealed magnetic core, used in claw pole synchronous machine, is investigated. The study is carried out by characterizing the material properties of two groups of samples subjected to a thermal ageing at 180 °C that corresponds to the maximum operating temperature of the claw pole rotor. The investigated characteristics are the electrical conductivity, the magnetic properties, the material microstructure and the Vickers hardness. They were characterized along with the ageing time. The results show that, during the thermal ageing, the hysteresis losses and the Vickers hardness have been affected by the magnetic ageing, whereas the electric conductivity and the normal B-H curve have not been modified. The microstructure analyses showed that carbides precipitates were the main cause behind the magnetic ageing. Moreover, the comparison between the results of two groups of samples revealed the possibility that the magnetic ageing of the material could have started during the manufacturing process of the magnetic core.
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Dates et versions

hal-03182735 , version 1 (26-03-2021)

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Meryeme Toto Jamil, Abdelkader Benabou, Stéphane Clénet, Sylvain Shihab, Laure Le Bellu Arbenz, et al.. Magnetic ageing investigation of bulk low-carbon silicon steel. Journal of Magnetism and Magnetic Materials, 2021, 527, pp.167761. ⟨10.1016/j.jmmm.2021.167761⟩. ⟨hal-03182735⟩
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