Back to results
US 2016/0102395 A1Published application
Three step surface enhancement process for carbon alloy fluid ends
AssigneeBaker Hughes Incorporated
InventorsGulshan Singh, Thomas Jaeger, Jennifer Flores
Life of this patent
Estimating the term…
Abstract
A method for improving corrosion resistance and fatigue performance of a metallic surface of an article comprises nitrocarburizing the metallic surface to provide a nitrocarburized surface; forming an oxide layer on the nitrocarburized surface; and treating the oxide layer with a mechanical process.
Claims20
A method for improving corrosion resistance and fatigue performance of a metallic surface of an article, the method comprising:
- nitrocarburizing the metallic surface to provide a nitrocarburized surface;
- forming an oxide layer on the nitrocarburized surface;
- and
- treating the metallic surface with a mechanical deformation process after the oxide layer is formed.
1 more element
An article comprising a treated metallic surface, the treated metallic surface comprising:
- a diffusion layer and a compound layer from a nitrocarburization process, and
- an oxide layer from an oxidization process;
- wherein a compression stress layer and a tensile stress layer from a mechanical deformation process are present in the treated metallic surface.
Dependencies are inferred from the claim text.