Abstract
In extrusion, knowledge of the velocity, strain-rate and temperature distribution is helpful in selecting process variables such as ram speed, initial temperatures of the billet and tooling etc. in order to obtaine the desired properties in the extruded product. In this paper a computerized numerical method is developed for predicting the temperature distribution during axisymmetric extrusion. The velocity field is obtained using Avitzur's spherical velocity field with discontinuities. Heat generation and conduction are considered as occurring simultaneously in each time increment. The predicted temperatures are compared with experimental data obtained by extruding commercial-purity lead and with other data available in the literature. Results indicate that the present method can be used for calculating temperatures in axisymmetric extrusion to sufficient accuracy for engineering purposes.
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