	US 11,994,040 B2
	System and method for repairing high-temperature gas turbine components
Anand A. Kulkarni, Charlotte, NC (US); Kazim Ozbaysal, Charlotte, NC (US); Ahmed Kamel, Orlando, FL (US); and Kyle I. Stoodt, Charlotte, NC (US)
Assigned to Siemens Energy, Inc., Orlando, FL (US)
Appl. No. 17/627,786
Filed by Siemens Energy, Inc., Orlando, FL (US)
PCT Filed Nov. 13, 2019, PCT No. PCT/US2019/061182 § 371(c)(1), (2) Date Jan. 17, 2022, PCT Pub. No. WO2021/021231, PCT Pub. Date Feb. 4, 2021.
Claims priority of provisional application 62/880,949, filed on Jul. 31, 2019.
Claims priority of provisional application 62/880,387, filed on Jul. 30, 2019.
Prior Publication US 2022/0203448 A1, Jun. 30, 2022
Int. Cl. F01D 5/28 (2006.01); B22F 1/10 (2022.01); B22F 3/10 (2006.01); B22F 3/26 (2006.01); B22F 5/04 (2006.01); B22F 10/16 (2021.01); B22F 10/18 (2021.01); B22F 10/38 (2021.01); B22F 10/40 (2021.01); B22F 10/68 (2021.01); B23K 1/00 (2006.01); B23K 35/30 (2006.01); B23P 6/00 (2006.01); C22C 19/05 (2006.01); F01D 5/00 (2006.01); F01D 25/00 (2006.01); B23K 101/00 (2006.01)

CPC F01D 5/28 (2013.01) [B22F 1/10 (2022.01); B22F 3/1021 (2013.01); B22F 3/26 (2013.01); B22F 5/04 (2013.01); B22F 10/16 (2021.01); B22F 10/18 (2021.01); B22F 10/38 (2021.01); B23K 1/0018 (2013.01); B23K 35/3033 (2013.01); B23P 6/005 (2013.01); C22C 19/058 (2013.01); F01D 5/005 (2013.01); F01D 25/005 (2013.01); B22F 10/40 (2021.01); B22F 10/68 (2021.01); B22F 2301/15 (2013.01); B23K 2101/001 (2018.08); F05D 2230/237 (2013.01); F05D 2230/64 (2013.01); F05D 2230/80 (2013.01)]

13 Claims

1. A method of forming a pre-sintered preform, the method comprising:

mixing a powdered base material and a binder to define a mixture;

forming the mixture into a shape without melting the base material;

removing the binder from the shape to define a skeleton, the skeleton having a volume that contains between 80 percent and 95 percent base material; and

infiltrating the skeleton with a melting point depressant material to define a finished pre-sintered preform, the finished pre-sintered preform having less than one percent porosity by volume,

wherein at least one of the mixture or the melting point depressant material includes at least one of powdered rhenium or ruthenium and the combined percentage of rhenium and ruthenium is 6% or less of the finished pre-sintered preform.