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Helping the Customer – Part 2

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Helping the Customer – Part 2

Ram Ramanan and Jerome Fourmann, Rio Tinto Alcan, Cleveland, Ohio, USA,
Nick Parson, Rio Tinto Alcan, Jonquière, Québec, Canada, and
Chris Jowett, Consultant for Ingot Sales, Alcan Primary Metal Group, Kingston, Ontario,


ABSTRACT—Alcan presented a paper for ET 1992[1] describing the various technical
assistance projects undertaken to help its customers find solutions to their day-to-day problems.
Customer issues included defects originating at the press (i.e., die lines and pick-up), postextrusion
defects (i.e., anodized color mismatch and atmospheric corrosion), as well as
performance issues (i.e., poor bending characteristics, dimensional tolerances and inadequate
mechanical properties). Rio Tinto Alcan’s current paper specifically reviews the technical
assistance work undertaken from January 2008 to Fall of 2011. The review highlights the fact that
the industry has made significant strides in its problem-solving abilities since 1992. Certain
issues, such as die lines and atmospheric corrosion are very rarely seen today. However, new
issues, such as high machinability, post-anodized streaking, and coarse grain size control have
challenged us. This paper addresses these new issues, and describes practical solutions that have
helped overcome these issues. In addition to the aforementioned items, this paper also covers
inconsistencies in billet quality encountered in the field that have led to extrusion defects, and
proposed solutions.

© 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.