Aluminum based bearing alloys
AssigneeAeplc
InventorBarry J. Eastwood
Life of this patent
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Abstract
An alloy for use as a bearing lining on a metal backing comprising, by weight, 1 to 11% silicon, 8 to 35% tin, and 0.2 to 3% copper, the balance being aluminum. The lining is first cast as a billet annealed, cold rolled, annealed and cold rolled a second time and then bonded to the metal backing. The lining optionally carries a soft overlay.
Claims11
An alloy consisting essentially of from 3 to 5% by weight particulate silicon of a maximum particle size of 20 microns, from 8 to 20% by weight tin in continuous phase, about 60% of said silicon being incorporated in the tin phase and from 0.2 to 2% by weight copper, the balance being aluminium in continuous phase.
A method of manufacturing a composite strip for a plain bearing which comprises:
- casting a billet of a bearing alloy consisting essentially of from 3 to 5% by weight particulate silicon of a maximum particle size of 20 microns, from 8 to 20% by weight tin in continuous phase and from 0.2 to 3% copper, the balance being aluminium in continuous phase;
- annealing said billet for a first time;
- cold rolling said annealed billet for a first time to form a strip;
- cladding one side of said strip with a layer of aluminium;
- cold rolling said strip for a second time, down to the required final thickness;
- and
- bonding said aluminium layer of said strip to a steel backing to form said composite strip.
Dependencies are inferred from the claim text.