Bearing having multilayer overlay and method of manufacture
AssigneeFederal-Mogul World Wide, Inc.
InventorsBrian L. Bank, James R. Toth
Life of this patent
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Abstract
A multilayer engine bearing (10) includes a steel backing (12) having a liner (14) of bearing metal of either copper-lead or aluminum alloys formed on the backing (12). A multilayer overplate (24, 124) is formed on the base lining member (16) and includes at least a first layer (28, 128) electrodeposited from a bath at a first current density to a desired thickness, and at least one additional layer (26, 126) electrodeposited from the same bath but at a different current density and to a desired thickness to yield a composite lamellar overplate structure having layers with differing deposit characteristics, such as hard and soft layers, generated from the same bath at different current densities.
Claims8
A method of fabricating a multilayer sliding bearing comprising:
- preparing a base lining member having a rigid metal backing and a layer of bearing metal applied to the backing;
- and
- electrodepositing from a single plating bath a lead-free multilayer overplate on the base lining member including at least two distinct lead-free layers electrodeposited at different current densities from the same bath to provide the multiple lead-free overplate layers with different deposit characteristics.
Dependencies are inferred from the claim text.