Interblade platform for a fan, rotor of a fan and associated manufacturing method

Abstract

The invention concerns an interblade platform ( 3 ) of a turbomachine fan, characterized in that it is produced: in an aluminum alloy belonging to the 7xxx series that has undergone full-temper heat treatment of the T7x type, or in an aluminum alloy belonging to the 2xxx series that has undergone heat treatment of the T6x or T8x type.

1 . Method for manufacturing an interblade platform that comprises a plate and two lateral ribs extending from a face of said plate, the method comprising the steps consisting of:
 providing a piece made from an aluminum alloy belonging to one of the series 2xxx or 7xxx, said piece having the shape of the interblade platform,   carrying out heat treatment of the piece,   anodizing the interblade platform,   placing a seal against each lateral rib of the interblade platform, and   bonding the seals to the interblade platform, wherein:
 the heat treatment is of the type 
 T7x in the case of an aluminum alloy belonging to the 7xxx series, or 
 T6x or T8x in the case of an aluminum alloy belonging to the 2xxx series, 
   the interblade platform does not undergo a shot blasting treatment prior to the anodization step.   
     
     
         2 . Manufacturing method according to  claim 1 , wherein the interblade platform is produced from an aluminum alloy belonging to the 7xxx series, and the full-temper heat treatment is of the T73 type. 
     
     
         3 . Manufacturing method according to  claim 2 , wherein the full-temper heat treatment is of the T7351 type. 
     
     
         4 . Manufacturing method according to  claim 1 , wherein the interblade platform is produced from an aluminum alloy belonging to the 7xxx series, and the full-temper heat treatment is of the T74 type. 
     
     
         5 . Interblade platform of a turbomachine fan, comprising a plate and two lateral ribs extending from one face of said plate, characterized in that it is obtained according to a manufacturing method according to  claim 1  and in that it is:
 in an aluminum alloy belonging to the 7xxx series that has undergone full-temper heat treatment of the T7x type, or 
 in an aluminum alloy belonging to the 2xxx series that has undergone heat treatment of the T6x or T8x type. 
 
     
     
         6 . Interblade platform according to  claim 5 , wherein the aluminum alloy is a grade 7×75 aluminum alloy. 
     
     
         7 . Interblade platform according to  claim 5 , wherein the aluminum alloy comprises at least one of the following alloys: 7075, 7175, 7475, 7010, 7040, 7050, 2016, 2050, 2219 or 2618. 
     
     
         8 . Interblade platform according to  claim 5 , wherein the aluminum alloy belongs to the 7xxx series that has undergone a full-temper treatment of the T73 type. 
     
     
         9 . Rotor of a turbomachine fan, characterized in that it comprises an interblade platform according to  claim 5 .