US 12,337,528 B2
Method for producing a part by selective melting of powder
Stephane Knittel, Moissy-Cramayel (FR); and Pascal Fabrice Bilhe, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 15/102,087
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Dec. 4, 2014, PCT No. PCT/FR2014/053169
§ 371(c)(1), (2) Date Jun. 6, 2016,
PCT Pub. No. WO2015/082853, PCT Pub. Date Jun. 11, 2015.
Claims priority of application No. 1362253 (FR), filed on Dec. 6, 2013.
Prior Publication US 2016/0305256 A1, Oct. 20, 2016
Int. Cl. B29C 64/153 (2017.01); B22F 3/10 (2006.01); B22F 3/23 (2006.01); B22F 10/28 (2021.01); B23K 15/00 (2006.01); B23K 26/00 (2014.01); B23K 26/342 (2014.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); C22C 1/047 (2023.01); C22C 1/05 (2023.01); C22C 32/00 (2006.01); F01D 5/28 (2006.01); B22F 5/00 (2006.01); B22F 5/04 (2006.01); B22F 12/63 (2021.01); B23K 101/00 (2006.01); B23K 103/08 (2006.01); B23K 103/10 (2006.01); B23K 103/14 (2006.01)
CPC B29C 64/153 (2017.08) [B22F 3/1039 (2013.01); B22F 3/23 (2013.01); B22F 10/28 (2021.01); B23K 15/0086 (2013.01); B23K 15/0093 (2013.01); B23K 26/0006 (2013.01); B23K 26/342 (2015.10); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); C22C 1/047 (2023.01); C22C 1/058 (2013.01); C22C 32/0078 (2013.01); F01D 5/28 (2013.01); B22F 5/009 (2013.01); B22F 5/04 (2013.01); B22F 12/63 (2021.01); B23K 2101/001 (2018.08); B23K 2103/08 (2018.08); B23K 2103/10 (2018.08); B23K 2103/14 (2018.08); F05D 2220/323 (2013.01); F05D 2230/233 (2013.01); F05D 2230/234 (2013.01); F05D 2230/31 (2013.01); F05D 2300/11 (2013.01); F05D 2300/121 (2013.01); F05D 2300/131 (2013.01); F05D 2300/132 (2013.01); Y02P 10/25 (2015.11)] 14 Claims
OG exemplary drawing
 
1. A method of fabricating a part by selectively melting powder, the method comprising reiterating following steps until the part is obtained:
depositing a first layer of a first powder having a first element as a main element of the first powder by moving a bottom wall of a first tank containing the first powder upward so that a predetermined amount of the first powder is situated above a horizontal plane at a top of the first tank, and then moving a first wiper or a first roller to move the first powder into a vessel, the first layer of the first powder having a constant predetermined thickness;
lowering a bottom wall of the vessel;
depositing a second layer of a second powder having a second element as a main element of the second powder on top of the first layer of the first powder by moving a bottom wall of a second tank containing the second powder upward so that a predetermined amount of the second powder is situated above the horizontal plane, and then moving a second wiper or a second roller to move the second powder into the vessel, the second layer of the second powder having a constant predetermined thickness, wherein the second element is different from the first element; and
moving an energy beam over a determined zone of the second layer of the second powder, energy delivered by the energy beam being less than energy required for locally melting of the second layer of the second powder and serving to initiate an exothermic reaction between the first element and the second element, in which energy given off by the exothermic reaction acts to locally melt together the first layer of the first powder and the second layer of the second powder so as to form a layer of material of the part,
wherein the vessel is disposed between the first tank and the second tank.