US 12,188,101 B2
Method and apparatus for manufacturing a part using successive deposition of layers
Daniel Cornu, Moissy-Cramayel (FR); Jawad Badreddine, Moissy-Cramayel (FR); and Vincent Dessoly, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 15/999,523
Filed by SAFRAN, Paris (FR)
PCT Filed Feb. 17, 2017, PCT No. PCT/FR2017/050363
§ 371(c)(1), (2) Date Aug. 17, 2018,
PCT Pub. No. WO2017/140994, PCT Pub. Date Aug. 24, 2017.
Claims priority of application No. 1651359 (FR), filed on Feb. 19, 2016.
Prior Publication US 2021/0178485 A1, Jun. 17, 2021
Int. Cl. B22F 10/66 (2021.01); B22F 10/28 (2021.01); B22F 10/62 (2021.01); B22F 12/41 (2021.01); B22F 12/53 (2021.01); B22F 12/70 (2021.01); B23K 26/14 (2014.01); B23K 26/342 (2014.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01); C21D 7/06 (2006.01); B22F 10/25 (2021.01)
CPC C21D 7/06 (2013.01) [B22F 10/28 (2021.01); B22F 10/62 (2021.01); B22F 10/66 (2021.01); B22F 12/41 (2021.01); B22F 12/53 (2021.01); B22F 12/70 (2021.01); B23K 26/1464 (2013.01); B23K 26/342 (2015.10); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B22F 10/25 (2021.01)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing at least a portion of a part by successive depositions of layers, comprising the following steps:
a) depositing a first layer of molten metal on a substrate, so as to form a first metallic bead on the substrate,
b) depositing a second layer of molten metal on said first bead, so as to form a second metallic bead on said first bead, steps a) and b) being performed using a laser head configured to melt a filler metal to form the molten metal, and
c) repeating steps a) and then b) for each new metallic layer to be deposited on top of the previous bead, until the formation of said at least one portion of the part,
d) compressing, after performing n instances of step c), n being greater than or equal to 1, the formed bead to relieve stress in the formed bead,
wherein the step of compressing the formed bead is performed by shot peening, the shot peening being performed using a shot peening nozzle configured for the compression of said bead to relieve stress in the bead, the shot peening nozzle being configured to follow the laser head to impact the bead with a delay that is determined based on a distance between the shot peening nozzle and the laser head, the distance being determined on the basis of the cooling temperature of the bead and the temperature for the compression of the bead so that the step of compressing the formed bead is performed before the complete cooling of said bead and when the material of said bead is at a temperature of more than 100° C.,
wherein shot peening is performed with particles of powder material having a size of 10 μm to 100 μm,
wherein the bead is affected along a depth of between 50 μm and 150 μm.