Devitrified metallic alloy coating for rotors
AssigneeLincoln Global, Inc.
InventorsWilliam D. Kiilunen, William T. Matthews
Life of this patent
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Abstract
The disclosed technology generally relates to coatings, and more particularly to metallic alloy coatings for rotors having nanocrystalline grains. In one aspect, a brake rotor comprises a disc-shaped friction area and a coating having a metallic alloy composition formed on the friction area to form a friction surface configured to contact a brake pad. The metallic alloy composition comprises Fe, Cr, B, C, Mn, Si and Mo as alloying elements that are present at concentrations exceeding impurity concentrations, and wherein the coating comprises nanocrystalline grains having an average grain size less than 100 nm.
Claims28
A brake rotor, comprising:
- a disc-shaped friction area;
- and
- a coating having a metallic alloy composition formed on the friction area to form a friction surface configured to contact a brake pad,
- wherein the metallic alloy composition comprises Fe, Cr, B, C, Mn, Si and Mo as alloying elements that are present at concentrations exceeding impurity concentrations, and wherein the coating comprises nanocrystalline grains having an average grain size less than 100 nm.
A brake rotor, comprising:
- a disc-shaped friction area;
- and
- a coating having a metallic alloy composition formed on the friction area to form a friction surface configured to contact a brake pad,
- wherein the coating comprises a metallic alloy composition comprising Fe, Cr, B, C, Mn, Si and Mo as alloying elements that are present at concentrations exceeding impurity concentrations such that the metallic alloy composition has a glass-to-crystalline transition temperature of 500° C.-750° C.
A method of coating a brake rotor, the method comprising:
- providing a brake rotor having a disc-shaped friction area;
- and
- forming a coating having a metallic alloy composition comprising Fe, Cr, B, C, Mn, Si and Mo as alloying elements on the disc-shaped friction area to form a friction surface configured to contact a brake pad,
- wherein forming the coating comprises forming a molten metallic alloy composition and depositing therefrom the coating under a thermally quenching condition such that, as-deposited, the coating comprises a metallic glass.
Dependencies are inferred from the claim text.