Surface process involving isotropic superfinishing
AssigneeSikorsky Aircraft Corporation
InventorsClark VanTine Cooper, Harsh Vinayak
Life of this patent
Estimating the term…
Abstract
A surface processing method and power transmission component includes refining a surface region of a metal from a first roughness to a second roughness less than the first roughness. A solid lubricous coating or a hard coating is then deposited on the surface region. The metal has a surface hardness above 50 Rc to reduce the risk that the metal will deform under the coating and leave the coating unsupported. The surface region of the metal may be transformed into a nitrogen-containing compound or solid solution surface region before the surface refining step and deposition of the coating.
Claims19
A surface processing method comprising the steps of:
- (a) refining a surface region of a metal from a first roughness greater than 10 microinches Ra to a second roughness that is less than 10 microinches Ra;
- and
- (b) depositing a coating on the surface region.
A surface processing method comprising the steps of:
- (a) hardening a metal to a surface hardness above Rc 50;
- (b) refining a surface region of the metal from a first roughness to a second roughness that is less than the first roughness;
- and
- (c) depositing a coating on the surface region.
A power transmission component comprising:
- a metal surface region having a surface roughness less than 10 microinches Ra and a hardness above Rc 50;
- and
- a coating on said metal surface region.
Dependencies are inferred from the claim text.