Title: Theoretical analysis of heat transfer in dieless wire drawing

Authors: Michael Daragh Naughton, Peter Tiernan

Addresses: Department of Manufacturing and Operations Engineering, Materials and Surface Science Institute (MSSI), University of Limerick, Limerick, Ireland. ' Department of Manufacturing and Operations Engineering, Materials and Surface Science Institute (MSSI), University of Limerick, Limerick, Ireland

Abstract: Dieless wire drawing involves the initiation of a localised plastic zone within a constantly tensioned wire. The heat affected zone experiences a temporary reduction in its flow stress. Temperature is considered to be the key controlling mechanisms of the process. This paper outlines the important role that adequate heating plays when designing a dieless wire drawing machine. The Fortunier method is used to analyse the radial and longitudinal temperature distributions for a titanium alloy (ELI grade Ti-6AL-4V) along the length of the deformation zone. From this mathematical model it becomes clear that the heat penetration depth is a function of the drawing velocity. Slower drawing velocities allow the heat to penetrate in a more even fashion and conversely larger drawing velocities result in an uneven heat distribution pattern.

Keywords: dieless drawing; wire drawing; analysis; heat transfer; flow stress; mathematical modelling; temperature distribution; titanium alloys; deformation zone; heat penetration depth; drawing velocity.

DOI: 10.1504/IJCMSSE.2009.024926

International Journal of Computational Materials Science and Surface Engineering, 2009 Vol.2 No.1/2, pp.84 - 90

Published online: 04 May 2009 *

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