Friction brake component and method for manufacturing the same
AssigneeGM Global Technology Operations LLC
InventorsMichael D. Hanna, Michael L. Holly, Ronnie T. Brown, James A. Webster, Lisa G. Devoe, Donna Y. Sekulovski, Kee Hyuk Im
Life of this patent
Estimating the term…
Abstract
A ferritically nitrocarburized rotational member of a vehicle brake is disclosed, including a rotational member having a friction surface configured for braking engagement with a corresponding friction material. A compound zone is disposed at the friction surface. An exposed surface of the compound zone is exposed to an atmosphere. The area of the exposed surface includes from about 0 percent to about 14 percent graphite.
Claims20
A ferritically nitrocarburized rotational member of a vehicle brake, comprising:
- a rotational member, including:
- a friction surface configured for braking engagement with a corresponding friction material;
- a compound zone disposed at the friction surface;
- and
- an exposed surface of the compound zone exposed to an atmosphere wherein an area of the exposed surface includes from about 0 percent to about 14 percent graphite.
A method for increasing useful life of a rotational member of a vehicle brake, comprising removing graphite flakes from a friction surface of the rotational member prior to nitrocarburizing the friction surface.
Dependencies are inferred from the claim text.