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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Electrical Steels
Presentation Title Subsurface microstructure for silicon steel with ultra-low iron loss
Author(s) So-Hyeon Lee, Jiheon Jeon, Seong hyeon Yoo, Jae Hyeon Koh, Chun Ku Kang, Ju-Young Kim
On-Site Speaker (Planned) So-Hyeon Lee
Abstract Scope Non-oriented silicon steel is a material with soft magnetic properties in the sheet plane, characterized by a high silicon content and a <100>//ND texture that gives high flux density and low iron loss. These properties provide the advantages of application for electric motor. However, the magnetic performance degrades at high frequencies by increase of anomalous eddy current loss, leading to overall iron loss, which is composed of hysteresis, eddy current, anomalous eddy current loss. In this study, we focus on investigating the microstructure of the subsurface to reduce the anomalous losses and the constant hysteresis losses. We prepared silicon steels with varying subsurface microstructure through different conditions of final annealing. The subsurface microstructure and iron loss were analyzed under atmospheric conditions during the final annealing process, and we discuss effect of subsurface microstructure on magnetic properties.
Proceedings Inclusion? Planned:
Keywords Magnetic Materials, Iron and Steel, Surface Modification and Coatings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Alloy development and process optimisation for high performance processable electrical steels.
Crystallographic texture of electrical steels after hot torsion tests
Design of high silicon steel with improved physical properties
Effect of intercritical annealing time during hot rolling on the microstructure and magnetic properties of low-C grain non-oriented electrical steels with 2% Si
Effects of Laser Treatment on the Magnetic Properties of FeSiB Amorphous Foil
Full-field crystal plasticity finite element study on the microstructure and orientations evolution of columnar grains in electrical steels
Improved Magnetic Properties of a Non-oriented Electrical Steel through Hot Dipping Process
Microstructure and Texture Evolution of Fe-6.5 wt% Si Alloy Produced by Selective Laser Melting Method
Quasi-In-Situ EBSD Tracking of the Evolution of Microstructure and Microtexture during Hot Band Annealing of a 2.8 wt% Si Non-oriented Electrical Steel
Subsurface microstructure for silicon steel with ultra-low iron loss
Thermophysical Properties of Ladle Slag with Different SiO₂ Content
uniform distribution of the magnetic easy axis on the lamination sheet plane.

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