SOLID-MATERIAL BEARING AND A METHOD FOR PRODUCING THE SAME

WIPO Patent Application WO/2003/013767

A1

The invention relates to a method for producing self-lubricating, maintenance-free bearings, in particular bushes or thrust washers, according to which at least bronze powder is used. The bronze powder is sintered in a furnace at a temperature of $m(F) 850° C in a protective gas atmosphere and the pores of the sintered bronze are filled by vacuum infiltration with a PTFE suspension. The bronze powder is cold pressed prior to sintering in a die to form a solid material slug comprising a wall thickness of between 2 and 20 mm, in such a way that the slug has uniformly distributed, open pores with a porosity of between 20 and 50 vol. %. The solid material slug is then sintered in such a way that the uniformly distributed, open pores stabilise. The invention also relates to a corresponding self-lubricating solid-material bearing consisting of sintered bronze, in which between 2 and 10 wt. % PTFE, (in relation to the total material) is deposited in the pores of the sintered material and in which the PTFE fraction below an inlet region fluctuates by a maximum 10 % over the total wall thickness.

ROOS UDO (DE)
KRAFT ERIK (DE)

PCT/EP2002/008621

February 20, 2003

August 02, 2002

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FEDERAL MOGUL DEVA GMBH (DE)
ROOS UDO (DE)
KRAFT ERIK (DE)

B22F3/02; B22F3/26; F16C33/12; F16C33/14; F16C33/20; (IPC1-7): B22F3/16; B29C67/20; B22F3/11; F16C33/14; F16C33/20

GB923642A	1963-04-18
US6042778A	2000-03-28
DE4225398A1	1994-02-03
US4393563A	1983-07-19

Fuchs, Jürgen H. (Wiesbaden, DE)

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