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Functional refractory molds for metal casting built by additive manufacturing
Bister, Geoffroy; Hautcoeur, Dominique; Deschuyteneer, Dorian et al.
2017ECerS2017 - 15th conference and exhibition of the European Ceramic Society
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Keywords :
Casting mold; Additive manufacturing; Alumina; Selective laser melting; Rapid prototyping
Abstract :
[en] Additive manufacturing is more and more used in the field of industry. This technique is notably employed in investment casting process in order to build cores and models. Nevertheless investment casting remains not cost effective in case of prototypes and very small series due to the quite large amount time needed to build and dry the molds. Additive manufacturing may also be used to directly shape metal parts but several problems are still linked to this technique as the presence of local defects in parts and the limitation of the number of metal or alloy available for this technique on the market. We propose an intermediate method that permits to build directly molds and cores by additive manufacturing using equipment initially dedicated to build metal parts. This method presents the main advantage to cast with a large variety of metals or alloys using a single ceramic material and only one set of building conditions. The properties of the casted parts are very similar with those produced by investment casting. This technique also permits the unique advantage to control the design of the shell thickness and structure in order to have a better control of the thermal fluxes during metal cooling. This would potentially ensure a better control of some casting defects. The use of alumina processed by selective laser melting (SLM) is shown and its outstanding resistance to temperature differential is demonstrated through casting trials with two diffferent representative alloys. Casting trials in industrial conditions will be illustrated.
Disciplines :
Materials science & engineering
Author, co-author :
Bister, Geoffroy;  BCRC
Hautcoeur, Dominique;  BCRC
Deschuyteneer, Dorian;  BCRC
Nyssen, Pierre;  Centre de Recherche Métalurgique - CRM
Cambier, Michel;  BCRC
Juste, Enrique;  BCRC
Mertens, Anne  ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Dedry, Olivier  ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Lecomte-Beckers, Jacqueline ;  Université de Liège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Lardot, Véronique;  BCRC
Cambier, Francis;  BCRC
Language :
English
Title :
Functional refractory molds for metal casting built by additive manufacturing
Publication date :
July 2017
Event name :
ECerS2017 - 15th conference and exhibition of the European Ceramic Society
Event organizer :
European Ceramic Society
Event place :
Budapest, Hungary
Event date :
Du 9 au 13 juillet 2017
Audience :
International
Peer reviewed :
Peer reviewed
Available on ORBi :
since 16 August 2017

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