Wheels including a coating layer and methods for making the same
AssigneeGarrett Transportation I Inc.
InventorsPalaniappa Murukesan, Philippe Renaud, Yann Simler, Mathieu Staub, Francois Kuehn
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. %.
Claims9
A wheel comprising:
- 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,
- wherein the substrate metal of the plurality of blades has coated directly thereon, without any intermediate chemical conversion or phosphate layer, a coating layer configured to enhance erosion resistance against condensed water droplets in exhaust gas recirculation or fuel cell environments, the coating comprising:
- a hardness of about 800 HV or greater,
- electroless nickel-phosphorous having a phosphorous content of from about 2 to about 4 wt. %, and
- a thickness of from about 20 to about 30 microns.
A wheel comprising:
- 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 that comprises aluminum or an alloy thereof,
- wherein the substrate metal of the plurality of blades has coated directly thereon, without any intermediate chemical conversion layer or phosphate layer, a coating layer configured to enhance erosion resistance, the erosion caused by condensed water droplets, the coating comprising:
- a hardness of from about 800 to about 950 HV,
- electroless nickel-phosphorous having a phosphorous content of from about 2 to about 4 wt. %, and
- a thickness of from about 20 to about 30 microns.
Dependencies are inferred from the claim text.