Stock material or miscellaneous articles – All metal or with adjacent metals – Laterally noncoextensive components
Patent
1989-12-20
1992-08-11
Zimmerman, John
Stock material or miscellaneous articles
All metal or with adjacent metals
Laterally noncoextensive components
428645, 428650, 384912, 384913, 148903, B32B 500, B32B 702, F16C 3312, F16C 3314
Patent
active
051377926
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a laminate material or laminate workpiece comprising a functional layer which is disposed on a backing layer, in particular a friction bearing layer with the structure of a solid but fusible dispersion with a matrix and at least one component which is dispersed in the matrix and which at least in the solid condition is insoluble in the material of the matrix or is soluble only in an amount smaller than the amount present, or with the structure of a substantially fusible mixture, which can be used for tribological purposes and which fixedly combined in itself, of components which are not soluble in each other or which are soluble in each other only in an amount smaller than the amount present, possibly/partly in crystal-like form.
2. The Related Art
Composite friction bearings may be considered as laminate materials or laminate workpieces. The functional layer of such friction bearings comprises a dispersion alloy, in particular lead bronze or an aluminium/tin dispersion alloy or an aluminium/lead dispersion alloy, and is applied to a backing layer, primarily of steel, which forms the bearing shell. In that connection, composite bearings of steel/lead bronze laminate material are of particular significance because of the high dynamic load-carrying capacity and the good run-in and emergency-running properties of the lead bronze. Due to the total insolubility of the two metals in each other in the solid condition, there is practically a mechanical mixture of copper and lead present in a functional layer consisting of lead bronze, and that mixture is produced from the homogeneous molten material in the course of a long setting time. The steel/lead bronze laminate materials which are conventionally used nowadays and which are produced by a strip coating process on steel are restricted to lead contents of up to about 22% by weight of the lead bronze. The difficulties in regard to manufacture of copper/lead alloys with lead contents within the miscibility gap, that is to say lead contents of between 40 and 50% by weight, are so great that hitherto such alloys have not been able to acquire any practical significance. Bonding between the steel backing member and cast lead bronze occurs through a strong metal bond between the steel backing member and the copper crystallites, the latter being formed primarily by solidification of the molten material. Therefore, formation of such copper crystallites must be encouraged. In practice, crystallites are achieved by holding the steel at a temperature of about 1100.degree. C. during casting of the lead bronze thereon. This procedure permits diffusion bonding between the steel and the copper crystallites. On the other hand, the structure of the lead bronze functional layer, which is heterogeneous due to the copper crystallites and lead precipitates gives rise to serious functional disadvantages in comparison with a homogeneous function layer structure. Comparable circumstances also arise in regard to friction bearing layers, representing the functional layer, consisting of aluminium/tin dispersion alloys and aluminium/lead dispersion alloys, as well as all conceivable functional layers for tribological purposes with a heterogeneous structure. For example, including the case of structures of mixtures which are fixedly combined in themselves and which are substantially fusible, of components which are not soluble in each other or which are soluble only in an amount which is smaller than the amount present.
German laid-open application (DE-OS) No. 29 37 108 already discloses a process for refining sliding alloys, in particular sliding or friction bearing alloys. Therein the alloy is subjected to a locally proceeding, punctiform melting effect by means of one or more highly concentrated energy or heat beams. The procedure is intended to cause sudden cooling of the molten material. The effect is achieved by progressive movement of the punctiform surface portion which is subjected to the energy or heat
REFERENCES:
patent: 3376183 (1968-04-01), Flynn et al.
patent: 3658488 (1972-04-01), Brown et al.
patent: 4157923 (1979-06-01), Yen et al.
patent: 4232094 (1980-11-01), Rhodes et al.
patent: 4267241 (1981-05-01), Mahrus et al.
patent: 4471032 (1984-09-01), Fukuoka et al.
patent: 4474861 (1984-10-01), Ecer
patent: 4532191 (1985-07-01), Humphries et al.
patent: 4675204 (1987-06-01), Nicoll et al.
patent: 4900639 (1990-02-01), Hodes et al.
patent: 4952822 (1990-09-01), Steeg et al.
patent: 4973523 (1990-11-01), Neuhaus et al.
Abstract for JP 57-63679, Apr. 17, 1982.
Abstract for JP 60-116761, Jun. 24, 1985.
Abstract for JP 62-207883, Sep. 12, 1987.
Abstract for JP 55-148752, Nov. 19, 1980.
F. D. Seaman et al., "Using the Industrial Laser to Surface Harden and Alloy", Metal Progress, vol. 108, No. 3, Aug. 1975, pp. 67-72, 74.
Engel Ulrich
Hodes Erich
Dubno Herbert
Glyco Aktiengesellschaft
Lianides Ronald
Zimmerman John
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