Stock material or miscellaneous articles – All metal or with adjacent metals – Laterally noncoextensive components
Patent
1989-12-20
1992-03-03
Dean, R.
Stock material or miscellaneous articles
All metal or with adjacent metals
Laterally noncoextensive components
428674, 148 1, 148903, 266113, 74215, 21912137, C23C 2602, F16C 3314
Patent
active
050932071
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This is a national phase of PCT/DE 89/00227 filed Apr. 14, 1989 and based, in turn, upon German national application P 38 13 801.8 filed Apr. 23, 1988 under the International Convention.
FIELD OF THE INVENTION
Our present invention relates to a laminate material or a laminate workpiece comprising a functional layer which is disposed on a backing layer. More particularly, the invention relates to 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 state, is insoluble in the material of the matrix or is soluble only in an amount smaller than the amount present. The invention relates to a structure of a substantially fusible mixture which can be used for tribological purposes and which is a combination of components which are not soluble in each other or which are soluble in each other only in an amount smaller than the present, possible partly in a crystal-like form.
BACKGROUND OF THE INVENTION
Composite friction bearings or laminate materials for the production of composite friction bearings can be considered as laminate materials or laminate workpieces of a type in which the friction bearing layer representing the functional layer comprises a dispersion alloy, in particular lead-bronze or an aluminum/tin dispersion alloy or an aluminum/lead dispersion alloy, and is applied to a backing layer, primarily of steel, which forms a bearing shell. Composite bearings of laminate material of the steel/lead-bronze type are of particular significance because of their 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 state, there is practically a mechanical mixture of copper and lead in the present functional layer consisting of lead bronze, that mixture being produced from the homogeneous molten material in the course of a long setting period. 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 to 50%, are so great that hitherto such alloys have not been of any practical significance. The bond between the steel backing member and the cast layer of lead bronze thereon is a strong metal bond between the steel backing member and the copper crystallites which are formed primarily by solidification from the molten material. Therefore, the formation of such copper crystallites must be utilized in the interest of achieving a good bond between the steel backing member and the lead bronze layer. In practice, that is achieved by an operation which provides that, for casting the lead/bronze thereon, the steel is raised to and held at a temperature of about 1100.degree. C., which 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 the lead precipitates, gives rise to serious functional disadvantages in comparison with a homogeneous functional layer structure. Comparable circumstances also arise in regard to friction bearing layers which represent the functional layer, consisting of aluminum/tin dispersion allows and aluminum/lead dispersion alloys, as well as all conceivable functional layers for tribological purposes with a heterogeneous structure, for example mixtures which are fixedly combined in themselves and which are substantially fusible, made 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 Open Application 29 37 108 already discloses a process for refining slidin
REFERENCES:
patent: 4153477 (1979-05-01), Beyer et al.
patent: 4232094 (1980-11-01), Rhodes et al.
patent: 4267241 (1981-05-01), Mahrus et al.
patent: 4451299 (1984-05-01), Smeggil et al.
patent: 4787944 (1988-11-01), Monita et al.
patent: 4924062 (1990-05-01), Zurcher
Engel Ulrich
Hodes Erich
Dean R.
Dubno Herbert
Glyco Aktiengesellschaft
Wyszomierski George
LandOfFree
Laminate material or laminate workpiece with a functional layer, does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laminate material or laminate workpiece with a functional layer,, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laminate material or laminate workpiece with a functional layer, will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-271480