Randomized trial evaluates how die material and surface finishing impact shearing outcomes in amorphous electrical steel sheets, suggesting improved production techniques.
Amorphous electrical steel sheets were subjected to shearing using a tungsten carbide–cobalt (WC–Co) punch. To suppress crack formation on the surface of the piercing holes, the punch was ion-sharpened and subsequently laser-processed to introduce a nanometer-periodic surface structure. A diamond-like carbon coating was applied to increase surface hardness, and the shearing characteristics were compared.
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Takahashi et al. (2026) studied this question.
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