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Abstract
Experiments in the extrusion of pure lead and tellurium lead rods of circular, square, rectangular triangular and I section form are described. These investigate the effects of section shape and punch speed on the necessary extrusion load, and on the nature of the flow of metal within the extruded rod. It is shown that, for a given reduction in area, the load is independent of section shape for all but re-entrant shapes and increases with increase in extrusion speed.
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