Sliding component and method for manufacturing the same

Details Sliding component and method for manufacturing the same Sliding component and method for manufacturing the same

2008-04-22

2008-04-22

King, Roy (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C419S023000, C419S038000, C428S547000, C428S548000

Reexamination Certificate

active

07361203

ABSTRACT:
A bearing is manufactured by filling iron-based material powder and copper-based material powder in a filling portion of a mold, compacting those material powder so as to form a green compact, and then sintering the green compact. The copper-based material powder contains flat powder particles, the flat powder particles having a large aspect ratio than particles of the iron-based material powder. The coppers-based powder particles segregate on a sliding surface by vibration. The sliding surface of a bearing is covered with copper, and a ratio of iron increases from the sliding surface toward the inside. Since a rotation shaft slides on the sliding surface covered with copper, a frictional coefficient between the rotation shaft and the sliding surface is reduced, thus enabling a smooth rotation thereof. Simultaneously the usage of iron imparts predetermined strength and durability.

REFERENCES:
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patent: 6623542 (2003-09-01), Yamashita et al.
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patent: 1454111 (1976-10-01), None
patent: 60-128201 (1985-07-01), None
patent: 63-24041 (1994-11-01), None
patent: 2002-129203 (2002-01-01), None
Patent Abstracts of Japan for JP2002-012903 published on Jan. 15, 2002.
International Search Report for PCT/JP03/09862 mailed on Sep. 30, 2003.
Patent Abstracts of Japan JP 60-128201 Published on Jul. 9, 1985.

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