Friction piece, mechanical system comprising such a friction piece and method of implementation
AssigneeH.E.F.
InventorsChristophe Heau, Philippe Maurin-Perrier
Life of this patent
Estimating the term…
Abstract
The present invention concerns a friction piece (10) suitable for operating in a lubricated medium at a temperature higher than 200° C. The piece (10) comprises a metal surface (12) and an external coating (14) composed of tungsten carbide doped with nitrogen WC(N) with an atomic ratio of nitrogen between 5 and 12%. The invention also relates to a mechanical system (1) comprising such a piece (10). The invention also relates to a method for implementing such a piece (10).
Claims9
A friction piece having a metal surface and an outer coating layer wherein the outer coating layer is composed of tungsten carbide doped with nitrogen WC(N), wherein the outer coating layer comprises:
- an atomic ratio of carbon of 40% to 43%,
- an atomic ratio of tungsten of 40% to 43%,
- an atomic ratio of nitrogen of 5% to 12%,
- an atomic ratio of cobalt of 7% to 9%, and
- other compounds having a total atomic ratio of 0% to 8%.
Dependencies are inferred from the claim text.