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Aluminum based bearing alloys
| Details |
Inventors: Eastwood, Barry J.;
Assignee: AEPLC (Rugby, GB2)
Primary Examiner: Dean; R.
Assistant Examiner:
Attorney, Agent or Firm: Price, Heneveld, Cooper, DeWitt & Litton
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. |
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DETAILED DESCRIPTION What is claimed as new and desired to be secured by Letters Patent of the United States is: 1.
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.
2.
An alloy according to claim 1 comprising 4% by weight silicon, 10% by weight tin, and 1% by weight copper, the balance being aluminium.
3.
An alloy according to claim 1 further incorporating 0.
05% by weight of a component selected from the group consisting of strontium and sodium.
4.
A composite strip for a plain bearing comprising a metal backing and a lining of an alloy as described in claim 1.
5.
A composite strip according to claim 4 wherein said metal backing comprises a steel backing, said strip further including a layer of aluminium or aluminium alloy between said backing and said lining.
6.
A composite strip according to claim 4 further including an overlay on said lining, said overlay comprising an alloy selected from the group consisting of lead/tin, lead/tin/copper, tin/copper, tin/antimony, tin/copper/antimony and lead/tin/copper/antimony.
7.
A composite strip according to claim 6 further including an interlayer between said lining and said overlay, said interlayer comprising a metal selected from the group consisting of nickel, iron, silver, cobalt, copper/zinc and copper/tin.
8.
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
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Manufacturing Materials 
