By optimizing the rounding radius of the corners of the rectangular cross-section of die channel in its deformation and sizing areas, angular rounding capacity is increased, metal laminar flow is achieved, and the deformation scheme is improved. As a result, there is a significant improvement in hard alloy die life, strip breakage during drawing is eliminated, and product quality indices are improved.
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Patent 3625678 USA, NPC 75–171, IPC С22С 19/00, “Nikel-Chrom alloys adaptеd for producing weldable sheet,” publ. 12.07.71.
N. S. Arsent’eva, L. M. Zheleznyak, A. I. Snigirev, and N. A. Snigirev, Patent 2371267 RF, IPC В21С3/00, “Hard allot die for drawing nichrome strip sections,” subm. 06.04.2008, publ. 10.27.2009, Byull., No. 30.
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*The additional symbol N in a grade corresponds to its designation, i.e., for heating elements.
Translated from Metallurg, No. 7, pp. 86–89, July, 2017.
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Zheleznyak, L.M., Kuz’mina, E.V. & Ezhov, Y.A. Drawing Tool Improvement in Nichrome and Ferro-Nichrome Strip Production Taking Account of Alloy Features. Metallurgist 61, 602–606 (2017). https://doi.org/10.1007/s11015-017-0540-7
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DOI: https://doi.org/10.1007/s11015-017-0540-7