Effect punch edge control on crack propagation during piercing of amorphous electrical steel sheets
Tomomi Shiratori, Nanaka Takahashi, Suguri Furuhata, Tatsuhiko Aizawa
Abstract. Realization of high-efficiency motors will be an important factor in supporting a sustainable society. An amorphous electrical steel sheets are expected to be used as core materials for high-efficiency motors and require sufficient dimensional accuracy and defect-free punching. However, this material has 2.2 GPa in tensile strength, no ductility, and over 900 HV in hardness. In recent years, some new tooling technologies for punching amorphous electrical steel sheets have been developed to reduce the induced damages into punched sheets. Especially, when using the nano-texturing tool, the width of crack on the surface of punched hole was reduced compared to the normal ground non-textured tool. In the present study, nano-texturing effect on the punching behavior is investigated and its mechanism is discussed.
Keywords
Punching, Nano-Texturing, Ion-Sharpening, Amorphous Electrical Steel Sheets
Published online 5/7/2025, 7 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Tomomi Shiratori, Nanaka Takahashi, Suguri Furuhata, Tatsuhiko Aizawa, Effect punch edge control on crack propagation during piercing of amorphous electrical steel sheets, Materials Research Proceedings, Vol. 54, pp 1013-1019, 2025
DOI: https://doi.org/10.21741/9781644903599-109
The article was published as article 109 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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