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Hot Extrusion of Al/SiC Powder through Porthole Die

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Hot Extrusion of Al/SiC Powder through Porthole Die

Jozef Zasadzinski, Artur Rekas, Jan Richert, Wojciech Libura, Dariusz Lesniak,
AGH University of Science and Technology, Cracow, Poland

Track: EXTRUSION/DIE PRACTICAL - Dies, Inserts, and Coatings

ABSTRACT—Nowadays metal matrix composites (MMC) with ceramic additives constitute an
essential modern engineering material used in production of various components. In this work,
the results of extruding pure aluminum powder reinforced with two, four, eight, and 16 percent of
SiC through a porthole die are presented. The influence of the compaction mode on extrusion
parameters and the properties of extruded parts were studied. The samples for extrusion were
prepared according to two procedures: one set was subjected to compaction at room temperature
up to 90 percent of the theoretical density; whereas, the other set were compacted at 380°C up to
96 percent. The samples were next extruded at 500°C through a porthole die with varying
extrusion ratios and extrusion speeds. The influence of the chemical composition and reduction
ratio during extrusion on the density, microstructure, and mechanical properties of extrudates
were investigated. The quality of the weld seams was also examined. The extrusion force for the
samples compacted at room temperature was lower compared to that for samples compacted at
380°C. It was found that the increasing SiC content increases mechanical properties of extrudates
obtained by hot extrusion through a porthole die.

© Extrusion Technology for Aluminum Profiles Foundation (ET Foundation). All rights reserved. No part of The Proceedings may be reproduced in any form without the express written permission of the ET Foundation.