US 11,905,602 B2
Method for reinforcing a steel component by carbonitriding
Jean-Baptiste Coudert, Granges les Beaumont (FR); and Alexandre Mondelin, St-Marcel les Valence (FR)
Assigned to SKF AEROSPACE FRANCE S.A.S, Montigny-le-Bretonneux (FR)
Filed by SKF Aerospace France S.A.S, Montigny-le-Bretonneux (FR)
Filed on Feb. 7, 2023, as Appl. No. 18/106,960.
Claims priority of application No. 2201204 (FR), filed on Feb. 11, 2022.
Prior Publication US 2023/0257865 A1, Aug. 17, 2023
Int. Cl. C23C 8/32 (2006.01); C21D 1/74 (2006.01); C21D 9/40 (2006.01); C22C 38/00 (2006.01); F16C 13/02 (2006.01); F16C 19/06 (2006.01)
CPC C23C 8/32 (2013.01) [C21D 1/74 (2013.01); C21D 9/40 (2013.01); C22C 38/00 (2013.01); F16C 13/02 (2013.01); F16C 19/06 (2013.01); C21D 2211/001 (2013.01)] 8 Claims
 
1. A method for reinforcing a steel component, comprising a carbonitriding step comprising a first substep of case-hardening, and a second substep of nitriding, with the first and second substeps of case-hardening and of nitriding of the step of carbonitriding the component are performed in one and the same heat treatment cycle,
wherein nitrogen and carbon used in the carbonitriding step are brought to the surface of the steel of the component in the form of ammonia and acetylene respectively.