US 11,724,311 B2
Components and the manufacture thereof via welding with reduced alloy-depletion
Fredrik Boxberg, Espoo (FI); Juha T. Saari, Espoo (FI); and Esa H. M. Vikman, Espoo (FI)
Assigned to Ingersoll-Rand Industrial U.S., Inc., Davidson, NC (US)
Filed by INGERSOLL-RAND INDUSTRIAL U.S., INC., Davidson, NC (US)
Filed on Sep. 26, 2019, as Appl. No. 16/583,676.
Prior Publication US 2021/0094098 A1, Apr. 1, 2021
Int. Cl. B22F 3/15 (2006.01); B22F 5/00 (2006.01); B22F 7/08 (2006.01)
CPC B22F 3/15 (2013.01) [B22F 5/00 (2013.01); B22F 7/08 (2013.01); B22F 2301/10 (2013.01); B22F 2301/20 (2013.01); B22F 2301/35 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of manufacturing a solid steel rotor comprising:
providing a solid steel rod having a variable diameter in a capsule, the steel rod having a surface comprising grooves formed along at least a portion of the surface;
machining the solid steel rod to include shoulders;
providing an alloy powder layer in the capsule positioned around select portions of the solid steel rod over the grooves and such that the alloy powder layer covers the shoulders of the solid steel rod, the powder layer comprising alloy material that is different from the steel of the solid steel rod;
placing steel end rings around the solid steel rod, the steel end rings located at opposite ends of the select portions of the alloy powder layer;
closing the capsule;
introducing the capsule into a hot isostatic pressing chamber; and
increasing pressure and temperature within the chamber causing:
the powder layer to compress into a cladding over the grooves of the solid steel rod, and
the cladding to weld to the solid steel rod, wherein the cladding forms recessed short circuit rings on the solid steel rod.