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Isothermal Pass Schedule to Prevent Delamination in the Dry Wire Drawing Process  

Ko, Dae-Cheol (부산대학교 동남권부품소재산학협력혁신연구소)
Lee, Sang-Kon (부산대학교 대학원 정밀기계공학과)
Kim, Min-An (부산대학교 대학원 정밀기계공학과)
Kim, Byung-Min (부산대학교 정밀정형 및 금형가공 연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.1, 2007 , pp. 57-63 More about this Journal
Abstract
Wire drawing process of the high carbon steel with a high speed is usually conducted at room temperature using a number of passes or reductions through consequently located dies. In the multi-pass drawing process, temperature rise in each pass affects the mechanical properties of the final product such as bending, torsion, and tensile property, etc. This temperature rise during the deformation promotes the occurrence of delamination, and deteriorates the torsion property and durability of wire. This study investigates the occurrence of delamination in the wire through the torsion test and the evaluation of wire temperature. The excessive wire temperature leads to the occurrence of the delamination. Based on the calculation of the wire temperature, a new pass schedule, which can prevent the delamination due to the excessive wire temperature rise, is designed through the isothermal pass schedule.
Keywords
Wire drawing process; Temperature rise; Delamination; Torsion test; Isothermal pass schedule;
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