Turbine airfoil casting method

B - Operations – Transporting – 23 – P

Patent

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Details

B23P 6/04 (2006.01) F01D 5/00 (2006.01)

Patent

CA 2709940

A method for making a turbine airfoil includes: (a) providing a mold having. (i) a core, (ii) an outer shell surrounding the core such that the core and the outer shell cooperatively define a cavity in the shape of an airfoil having at least one outer wall; and (Ui ) a core support extending from the core to the outer shell through a portion of the cavity that defines the at least one sidewalk (b) introducing molten metal alloy into the cavity and surrounding the core support; (c) solidifying the alloy to form an airfoil casting having at least one outer wall which has at least one core support opening passing therethrough; (d) removing the moid so as to expose the airfoil; and (e) sealing the at least one core support opening in the airfoil with a metal alloy mctallurgically bonded to the at least one outer wall.

L'invention concerne un procédé de réalisation d'un profil de turbine comprenant : (a) la mise en uvre d'un moule ayant (i) un noyau, (ii) une carapace extérieure entourant le noyau de sorte que le noyau et la carapace extérieure définissent en coopération une cavité sous la forme d'un profil ayant au moins une paroi extérieure ; et (iii) un support de noyau s'étendant du noyau jusqu'à la carapace extérieure au travers d'une partie de la cavité qui définit ladite ou lesdites parois latérales ; (b) l'introduction d'un alliage métallique liquide dans la cavité et autour du support de noyau ; (c) la solidification de l'alliage pour former un moulage de profil ayant au moins une paroi extérieure qui est traversée par au moins une ouverture de support de noyau ; (d) le retrait du moule afin d'exposer le profil ; et (e) l'étanchéité de ladite ou lesdites ouvertures de support de noyau dans le profil à l'aide d'un alliage métallique collé de manière métallurgique à ladite ou lesdites parois extérieures.

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