Metal working – Method of mechanical manufacture – Combined manufacture including applying or shaping of fluent...
Patent
1991-03-22
1993-07-27
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Combined manufacture including applying or shaping of fluent...
2989812, 298953, 419 3, 419 6, 419 8, 419 43, 492 60, B22D 11126, B21B 1302
Patent
active
052301389
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a method of manufacturing a metal-contained composite material to be used for a machine part, electrical sliding contact member, electric and thermal conductor, electromagnetic shielding member and the like, and a metal-contained composite material produced thereby.
2. Background Art
Conventionally, composite materials consisting of metals or of a metal and a ceramic material have been widely used. These composite materials have been developed in an attempt to combine the properties of their components and to acquire properties that cannot be provided by the individual components.
For example, it is known that composite materials, which may be obtained from material powders of W-WC, Ag-C, Ag-CdO, Cu-Al.sub.2 O.sub.3, Ni-NiO, Al-Al.sub.2 O.sub.3, etc., have the properties of both metal and ceramic material. These composite materials are wear-resistant, heat-resistant, high in strength, and electrically and thermally conductive, and thus are used for contacts, working tools, mechanical structural members, and the like.
Metal/ceramic composite materials are also known in which a metal is coated with a ceramic material or a ceramic material is metallized. This type of composite materials is used for parts of electronic devices, such as a circuit board, or for machine parts such as a turbine blade.
There are still other composite materials such as a CFRM (ceramic fiber reinforced metal) in which filaments or whiskers of carbon, SiC, Al.sub.2 O.sub.3, or K.sub.3 TiO.sub.3 are embedded in a metal, and a MFRC (metal fiber reinforced ceramics) in which metal filaments are embedded in a ceramic material. In these composite materials, the strength and tenacity of the metal or ceramic material are improved.
The above-mentioned various composite materials, however, have such a problem in that the composite materials made from powder material and the metal/ceramic composite materials do not have satisfactory electrical and mechanical properties, though they are inexpensive, while the CFRM and MFRC are costly and are limited in use.
An object of this invention is to provide a method of manufacturing a metal-contained composite material in which the properties of metal and various sinterable materials compounded therewith are fully retained and excellent properties that cannot be acquired by the individual components are obtained. Another object of this invention is to provide a metal-contained composite material having such excellent properties as mentioned before.
DISCLOSURE OF THE INVENTION
To achieve the above objects, according to this invention, there is provided a method of manufacturing a metal-contained composite material, characterized by comprising: a process of fabricating a roll of a laminate, prepared by a lamination of at least one sinterable material on one surface of a metal strip, by winding up the laminate on itself or around a core; and a process of subjecting the roll to plastic working. The method of manufacturing a metal-contained composite material according to this invention will be described hereinafter according to the manufacturing processes.
First, the process of making a roll will be described with reference to the relevant drawings. In this process, a spirally wound roll is obtained by winding up a metal strip, having a sinterable material layer formed on one surface thereof, on itself or around a core. The core material used in this process may be either the same metal as the metal strip or some other metal different therefrom.
When carrying out this process, the metal strip may be wound up while at the same time forming a sinterable material layer on one surface of the metal strip, or a sinterable material layer may be previously formed on one surface of the metal strip before the metal strip is wound up. Of these methods, the former in which the metal strip is wound up while laminating the sinterable material thereon is preferred, because the productivity is higher and the manufacturing cost is lower.
FIG. 1 is a diagram illustr
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Ozaki Masanori
Shiga Shoji
Suzuki Minoru
Arbes Carl J.
Furukawa Electric Co. Ltd.
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