Process for the repair and restoration of dynamically...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 24/04 (2006.01) B23P 6/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2643717

The present invention relates to a process for the repair and restoration of dynamically stressed components comprising aluminium alloys for aircraft applications, in which: a) the base material from which the component to be repaired was manufactured is determined, b) the component to be repaired is, if necessary, subjected to pre-treatment, c) a spray material which has chemical, physical and mechanical properties comparable to those of the base material is selected, d) coating parameters for the subsequent coating process are selected so that bonding within the layer to be applied is optimized, e) the spray material is applied to the component to be repaired by means of cold gas spraying in order to replace material which has been removed by wear and pre-treatment and f) the coating component is after-treated in such a way that the original component geometry is restored. This process allows components for use in aircraft to be restored additional process steps, in particular thermal process steps such as sintering, being necessary for this purpose.

La présente invention concerne un procédé de réparation et de réutilisation de composants sollicités de manière dynamique, en alliages d'aluminium pour applications en technique aéronautique, et dans lequel (a) on détermine quel matériau de base a été utilisé pour fabriquer le composant à réparer, (b) le composant à réparer subit si nécessaire un pré-usinage, (c) on sélectionne un matériau de projection qui présente des propriétés chimiques, physiques et mécaniques similaires à celles du matériau de base, (d) pour l'opération de revêtement qui suit, on sélectionne des paramètres de revêtement de telle sorte que la liaison à l'intérieur de la couche à appliquer soit optimisée, (e) le matériau de projection est appliqué par projection au gaz froid sur le composant à réparer pour remplacer le matériau arraché suite à l'usure et au pré-usinage et (f) le composant revêtu subit un usinage final de manière à rétablir la géométrie initiale du composant. Ce procédé permet de réutiliser des composants destinés à être utilisés en aéronautique sans devoir dans ce but utiliser des étapes supplémentaires de traitement et en particulier des étapes de traitement thermique, par exemple le frittage.

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