US 11,788,422 B2
Two-layer abrasive coating for rotor-blade tips, method, component, and turbine assembly
Eckart Schumann, Berlin (DE); Britta Stöhr, Berlin (DE); Arturo Flores Renteria, Berlin (DE); Francis Ladru, Berlin (DE); Thorsten Schulz, Berlin (DE); and Adrian Wollnik, Dallgow-Döberitz (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Bayern (DE)
Appl. No. 17/434,751
Filed by Siemens Energy Global GmbH & Co. KG, Bayern (DE)
PCT Filed Feb. 13, 2020, PCT No. PCT/EP2020/053731
§ 371(c)(1), (2) Date Aug. 29, 2021,
PCT Pub. No. WO2020/177999, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 202 926.4 (DE), filed on Mar. 5, 2019.
Prior Publication US 2022/0170378 A1, Jun. 2, 2022
Int. Cl. B23K 1/19 (2006.01); F01D 5/28 (2006.01); B23K 1/00 (2006.01); B23K 103/18 (2006.01); B23K 101/00 (2006.01)
CPC F01D 5/288 (2013.01) [B23K 1/0018 (2013.01); B23K 1/19 (2013.01); B23K 2101/001 (2018.08); B23K 2103/26 (2018.08); F05D 2220/32 (2013.01); F05D 2230/31 (2013.01); F05D 2230/90 (2013.01); F05D 2240/30 (2013.01); F05D 2300/177 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for producing an abrasive coating on a substrate, or on a blade tip of a rotor blade, the process comprising:
applying two layers for the abrasive coating, namely a bottom solder layer and an outer, second layer of a coating comprising abrasive particles as tapes, to the substrate, and
joining the bottom solder layer to the substrate by a soldering process, as a result of which the outer, second layer is also bonded-on,
where a material of the bottom solder layer has a melting point which is at least 10K lower than that of a material of the substrate, and also has a melting point which is at least 10K lower than that of a material of the outer, second layer, and
wherein the abrasive particles are present in the outer, second layer and partly in the bottom solder layer.