C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 47/00 (2006.01) C22C 47/20 (2006.01)
Patent
CA 2730069
The invention relates to a method for producing a metallic part comprising inner reinforcements consisting of ceramic fibres, according to which: at least one recess (10A) for an insert is machined in a metallic body (10) having an upper surface (10B); at least one insert (11) consisting of ceramic fibres in a metallic matrix is arranged in the recess; the insert is covered with a cover (12); the gap around the insert is placed under a vacuum and hermetically sealed; the entire metallic body with the cover is treated by hot isostatic compaction; and said treated assembly is machined to produce said part. The method is characterised in that the insert (11) is rectilinear, and the recess for the insert in the metallic body forms a rectilinear groove (10A), the cover (12) being dimensioned in such a way as to be able to placed on the insert (11) in the recess after having been shrunk by cooling and to establish a tight fit in the groove by means of dilation such as to close the space.
L'invention porte sur un procédé de fabrication d'une pièce métallique comportant des renforts internes formés de fibres céramiques, selon lequel - on usine, dans un corps métallique (10) présentant une face supérieure (10B), au moins un logement (10A) pour un insert, - on dispose au moins un insert (11) formé des fibres céramiques dans une matrice métallique dans le logement, - on recouvre l'insert d'un couvercle (12), - on met sous vide l'espace interstitiel autour de l'insert et on ferme ledit espace de manière hermétique, - on traite l'ensemble du corps métallique avec couvercle par compaction isostatique à chaud et on usine ledit ensemble traité pour obtenir ladite pièce. Le procédé est caractérisé par le fait que l'insert (11) est rectiligne, et le logement de l'insert dans le corps métallique forme une rainure rectiligne (10A), le couvercle (12) étant dimensionné de façon à permettre sa mise en place sur l'insert (11) dans le logement après avoir été rétréci par refroidissement et à exercer un ajustement serré dans la rainure par dilatation de manière à fermer ledit espace.
Dunleavy Patrick
Masson Richard
Goudreau Gage Dubuc
Messier-Dowty Sa
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