Possibilities for compacting specimens of aluminum turnings by screw extrusion

Possibilities for compacting specimens of aluminum turnings by screw extrusion

Compaction of aluminum AK7 alloy turnings during preparation of prismatic billets by screw extrusion is studied. It is shown that with an extrusion pressure of 800 MPa and a back-pressure of 100 MPa compacts are prepared with porosity not exceeding 3%. At the same time, with compaction of turnings i...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics Vol. 43; no. 11-12; pp. 549 - 551
Main Authors: Beigel'zimer, Ya E, Shevelev, A I, Synkov, S G
Format: Journal Article
Language:English
Published: New York Springer Nature B.V 01-11-2004
Subjects:
Aluminum base alloys
Billets
Chips
Compacting
Extrusion
Extrusion billets
Porosity
Screws
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Summary:Compaction of aluminum AK7 alloy turnings during preparation of prismatic billets by screw extrusion is studied. It is shown that with an extrusion pressure of 800 MPa and a back-pressure of 100 MPa compacts are prepared with porosity not exceeding 3%. At the same time, with compaction of turnings in a rigid container with an axial pressure of 1200 MPa specimen porosity is 13%. This effect is explained by intense shear in powder material during screw extrusion.[PUBLICATION ABSTRACT]
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ISSN:1068-1302
1573-9066
DOI:10.1007/s11106-005-0020-7