Process for making composite bearing material

Details Process for making composite bearing material Process for making composite bearing material

1975-05-01

1977-01-11

Schafer, Richard E.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

291823, 75200, 75208CS, 75224, 75226, 75227, B22F 318

Patent

active

040024725

ABSTRACT:
A process for making a bimetallic bearing material comprising a hard metal backing strip having a leaded copper or leaded bronze bearing lining tenaciously bonded to at least one face thereof which includes the steps of applying a layer of a prealloyed metal powder of a controlled composition and particle size on one face of the backing strip, sintering the composite material in a reducing atmosphere at a temperature ranging from 1450.degree. F to 1600.degree. F, cooling the sintered composite strip to a temperature of 1000.degree. F to 1200.degree. F and densifying the composite strip by roll compaction to 100% of theoretical density in a manner to effect further sintering and enhancement of the bond strength between the backing material and lining. The compacted strip thereafter is allowed to cool to a temperature below about 800.degree. F in a nonoxidizing protective environment whereafter it can be fabricated into various bearing components, such as thrust washers, bushings, shell bearings and the like.

REFERENCES:
patent: 2815567 (1957-12-01), Gould et al.
patent: 2986464 (1961-05-01), Lewis et al.
patent: 3094415 (1963-06-01), Gallatin et al.
Hansen, Constitution of Binary Phase Diagrams, McGraw-Hill, N.Y., 1958, pp. 609-612.
Goetzel, Treatise on Powder Metallurgy, vol. II Interscience, N.Y., 1950 pp. 475-479.

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