Method For Repairing An Aluminium Alloy Component

Abstract

The invention refers to a method for the repair of an aluminium alloy component, in particular a precipitation-hardened aluminium alloy component, comprising the steps of: a) depositing by cold spray on said component to be repaired a portion of supplied material, thus obtaining a partially repaired component; b) subjecting said partially repaired component to a thermal treatment, thus obtaining a repaired component, the conditions of performance of said thermal treatment being selected according to the composition and dimensional tolerances of said component.

1 - 12 . (canceled) 
     
     
         13 . A method for repairing an aluminum alloy component comprising the steps of:
 a) cold spray depositing on said component to be repaired a portion of supplied material having a composition identical to that of said component to be repaired, thus obtaining a partially repaired component;   b) subjecting said partially repaired component to a thermal treatment, thus obtaining a repaired component, the conditions for performing said thermal treatment being selected as a function of the composition and of the dimension tolerances of said component,   wherein step b) thermal treatment comprises:
 c) a first step of solubilisation followed by cooling in water; and 
   d) a second step, following the first step c), of precipitation.   
     
     
         14 . The method according to  claim 13 , wherein, if said component to be repaired is obtained from type 355, 356 or 357 Al—Si alloys, said first step c) of solubilisation is performed at a temperature from 500° C. to 580° C. for a time in the range between 6 and 20 hours, and said second step d) of precipitation is performed at a temperature from 100° C. to 300° C. for a time in the range between 3 and 12 hours. 
     
     
         15 . The method according to  claim 14 , wherein, if said component to be repaired is obtained from type 355, 356 or 357 Al—Si alloys, said first step c) of solubilisation is performed at a temperature from 530° C. to 550° C. for a time in the range between 6 and 20 hours, and said second step d) of precipitation is performed at a temperature from 150° C. to 230° C. for a time in the range between 3 and 12 hours. 
     
     
         16 . The method according to  claim 13 , wherein, if said component to be repaired is obtained from type 2014, 2618 or 2024 Al—Si alloys, said first step c) of solubilisation is performed at a temperature from 400° C. to 600° C. for a time in the range between 1 and 3 hours; said second step of precipitation is performed at a temperature from 150° C. to 250° C. for a time in the range between 8 and 20 hours. 
     
     
         17 . The method according to  claim 16 , wherein, if said component to be repaired is obtained from type 2014, 2618 or 2024 Al—Si alloys, said first step c) of solubilisation is performed at a temperature from 460° C. to 535° C. for a time in the range between 1 and 3 hours; said second step of precipitation is performed at a temperature from 160° C. to 200° C. for a time in the range between 8 and 20 hours. 
     
     
         18 . A method for repairing an aluminium alloy component obtained from an alloy selected from the group consisting of 355, 356, 357, 2014, 2618 and 2024 Al—Si alloys, comprising the steps of:
 a) cold spray depositing on said component to be repaired a portion of supplied material having a composition identical to that of said component to be repaired, thus obtaining a partially repaired component; 
 b) subjecting said partially repaired component to a thermal treatment, thus obtaining a 
 repaired component, the conditions for performing said thermal treatment being selected as a function of the composition and of the dimension tolerances of said component, 
 wherein step b) of thermal treatment comprises a step e) of stress-relieving, wherein:
 if said component to be repaired is obtained from type 355, 356 or 357 Al—Si alloys, said step e) of stress-relieving is performed at a temperature from 80° C. to 250° C. for a time from 3 to 10 hours, or;—if said component to be repaired is obtained from type 2014, 2618 or 2024 Al—Si alloys, said step e) of stress-relieving is performed at a temperature from 80° C. to 200° C. for a time from 3 to 20 hours. 
 
 
     
     
         19 . The method according to  claim 18 , wherein, if said component to be repaired is obtained from type 355, 356 or 357 Al—Si alloys, said step e) of stress-relieving is performed at a temperature from 100° C. to 200° C. 
     
     
         20 . The method according to  claim 18 , wherein, if said component to be repaired is obtained from type 2014, 2618 or 2024 Al—Si alloys, said step e) of stress-relieving is performed at a temperature from 100° C. to 180° C. for a time from 3 to 20 hours.