Wheels including a coating layer and methods for making the same
AssigneeGarrett Transportation I Inc.
InventorsPhilippe Renaud, Yann Simler, Mathieu Staub, Francois Kuehn, Palaniappa Murukesan
Life of this patent
Estimating the term…
Abstract
A wheel includes a hub portion configured to rotate about a rotational axis. A plurality of blades extends radially outward from the hub portion. Each blade of the plurality of blades includes a leading edge and a trailing edge. The hub portion and the plurality of blades include a substrate metal. The substrate metal of the plurality of blades has coated directly thereon a coating layer that has a hardness of about 800 HV or greater and that includes electroless nickel-phosphorous having a phosphorous content of from about 2 to about 4 wt. %.
Claims10
A method for making a wheel, the method comprising:
- providing a substrate wheel that comprises:
- a hub portion configured to rotate about a rotational axis, and
- a plurality of blades extending radially outward from the hub portion, wherein each blade of the plurality of blades comprises a leading edge and a trailing edge,
- wherein the hub portion and the plurality of blades comprise a substrate metal;
- forming on the substrate metal a coating layer comprising electroless nickel-phosphorous having a phosphorous content of from about 2 to about 4 wt. %, wherein forming the coating layer comprises immersing the substrate wheel in an electroless nickel-phosphorous plating bath comprising nickel cations and phosphorous oxide anions;
- and
- exposing the substrate wheel including the coating layer to a heat treatment process at heat treating conditions effective to increase a hardness of the coating layer to about 800 HV or greater.
Dependencies are inferred from the claim text.