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Lookup NU author(s): Dr Peng Gong
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The nitriding process plays an essential role in the production of grain-oriented silicon steel (GOSS) via the acquired-inhibitor process. It is surprising at first glance to find that the increase of temperature from 840 to 930 °C retards the nitriding of GOSS rather than accelerating it. By both extensive microstructural characterization and thermodynamic calculations, this is attributed to the formation of austenite at high temperature in the oxidization layer, in which N atoms diffuse at a much lower rate than in ferrite. It is concluded that there exists an upper-limit temperature for the efficient nitriding of GOSS, which is determined by both the preceding decarburization process and the nitriding atmosphere.
Author(s): Guo QY, Li XH, Gong P, Nutter J, Rainforth WM, Luo HW
Publication type: Article
Publication status: Published
Journal: Steel Research International
Year: 2021
Volume: 92
Issue: 4
Print publication date: 01/04/2021
Online publication date: 05/01/2021
Acceptance date: 28/12/2020
ISSN (print): 1611-3683
ISSN (electronic): 1869-344X
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
URL: https://doi.org/10.1002/srin.202000545
DOI: 10.1002/srin.202000545
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