US 11,982,207 B2
Tip repair of a turbine component using a composite tip boron base pre-sintered preform
Atul L. Navale, Houston, TX (US); James A. Yarbrough, Winston-Salem, NC (US); Somesh J. Ghunakikar, Orlando, FL (US); and Ivan F. Oliver Vargas, Houston, TX (US)
Assigned to Siemens Energy, Inc., Orlando, FL (US)
Appl. No. 17/438,489
Filed by Siemens Energy, Inc., Orlando, FL (US)
PCT Filed Mar. 29, 2019, PCT No. PCT/US2019/024750
§ 371(c)(1), (2) Date Sep. 13, 2021,
PCT Pub. No. WO2020/204872, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0145765 A1, May 12, 2022
Int. Cl. F01D 5/20 (2006.01); B23P 6/00 (2006.01); F01D 5/00 (2006.01)
CPC F01D 5/20 (2013.01) [B23P 6/002 (2013.01); F01D 5/005 (2013.01); F05D 2220/32 (2013.01); F05D 2230/80 (2013.01); F05D 2240/30 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for repairing a tip portion of a turbine component having a structural defect, comprising:
providing a turbine component with a structural defect in a tip portion of the turbine component;
the turbine component comprising a superalloy base material,
removing at least a portion of the structural defect by machining or cutting the tip portion of the turbine component;
providing a pre-sintered preform (PSP) configured to mate with an upper surface of a remaining portion of the turbine component;
applying the PSP to the upper surface, wherein the PSP comprises a superalloy material and a braze material; and
subjecting the PSP and the remaining portion of the turbine component to a brazing process to melt the braze material and fill in any remaining portion of the structural defect,
wherein the PSP comprises a first portion having a first composition and a second portion having a second composition.