JPS6266929A - Manufacture of metallic-base composite material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applications] The present invention relates to a method for manufacturing a metal matrix composite material in which a reinforcing material of ceramic or metal whiskers or short fibers is composited with a base metal.

[Conventional technology]

Conventionally, composite materials using whiskers or short fibers as reinforcement materials, and composite materials formed using metal powder as a base material, were created by mixing the metal powder and reinforcing material with air, etc., and then the base metal powder was in a semi-molten state. It is manufactured by heating and pressurizing it until it becomes , and is attracting attention as a material for aircraft and automobile parts.

[Problem that the invention seeks to solve]

Conventional metal matrix composites manufactured as described above have variations in mechanical properties such as tensile strength and abrasion resistance, making it difficult to obtain materials with uniform properties.
There was a point.

The reason why the mechanical properties are not uniform is that the whiskers or short fibers as reinforcing materials cannot be sufficiently disentangled, and the whiskers or short fibers cannot be uniformly mixed with the base metal powder. Therefore, continuous processing was difficult and production efficiency was poor (it was difficult to manufacture long materials).

In addition, in order to mix the base metal powder and the reinforcing material, the metal powder is about 10 μm and requires high precision, which leads to the problem that the base metal powder is expensive and the composite material is expensive. There were also points.

The present invention solves these problems, and provides a metal matrix composite that can uniformize and improve mechanical properties at the same time, and that can manufacture metal matrix composites of various sizes and shapes at low cost. The purpose is to propose a manufacturing method for wood.

[Means for solving problems]

The method for producing a metal matrix composite according to the present invention involves attaching a reinforcing material such as whiskers or short fibers to a base metal foil, making the reinforcing material-attached metal foil into a laminate, enclosing the outer periphery, and then heating and extruding the reinforcing material. Alternatively, the base metal and the reinforcing material can be combined by rolling.

[Effect]

In this invention, the reinforcing material is adhered onto the base metal foil to form a layer of the reinforcing material, and then the composite material is formed as the shoe body, so that the reinforcing material is mixed uniformly.

〔Example〕

FIG. 1 is a perspective view showing a billet according to an embodiment of the present invention, and in the figure, 1 is a billet, 2 is a base metal foil, for example, 6061 metal foil with a thickness of 0.2 mm, and 3 is a reinforced The material is, for example, SiC whiskers.

As shown in FIG. 2, this billet 1 is made by applying, for example, polyvinyl alcohol as a solvent onto a base metal foil 2, then spraying reinforcing material 2 made of whiskers to form a layer of reinforcing material 2, and rolling this. It can be attached to form a cylindrical laminate, either as it is or by vacuum degassing to remove the solvent and then sealing both ends.

This billet 1 is heated until the base metal T12 becomes semi-molten and extruded or rolled to diffusion bond the base metal foil 1 and the reinforcing material 2 to produce a composite material.

Next, a case in which a composite material is specifically produced according to the above example will be described.

6061A with a thickness of 0.2111Il as the base metal foil 1
A cylindrical billet 1 with a diameter of 80 m and a length of 100 m was made by using I foil and spraying SiC whiskers as a reinforcing material 2 on this 6061A so that the volume ratio vf was 20%.
After forming and heating to about 600℃ to diffuse reinforcement into the base material,
This billet 1 was extruded at an extrusion ratio of 16 while being heated to a temperature of about 430° C. to produce a composite material, and the mechanical properties of this composite material were investigated.

3 and 4 show 6061Aj as the base metal foil 1.
Figure 3 shows the mechanical properties of a composite material manufactured using foil and a composite material manufactured using conventional metal powder, with the horizontal axis representing the test temperature and the vertical axis representing the tensile strength. The test results are shown in FIG. 4, with the horizontal axis representing the test temperature and the vertical axis representing the elongation. In FIGS. 3 and 4, A represents the composite material according to this example, B shows the case of a composite material made by a conventional method.

As shown in Figures 3 and 4, the composite material according to this example has a tensile strength of 20 to 30% compared to the composite material manufactured by the conventional method.
, the elongation was improved by about 50%.

In the above embodiment, the billet 1 was formed into a cylindrical shape, but as shown in the cross-sectional view of FIG. Processing can yield composites with similar mechanical properties.

〔Effect of the invention〕

As explained above, this invention involves attaching a reinforcing material to a base metal foil, forming a layer of the reinforcing material, forming a composite material as a laminate, and then uniformly blending the reinforcing material onto the base material. This makes it possible to make the mwt characteristics of the composite material uniform and to improve the mechanical properties. Further, since it is easy to uniformly mix the reinforcing material into the base material, composite materials of various sizes and shapes can be manufactured, and long materials can also be easily manufactured.

Furthermore, since metal foil is less expensive than metal powder, it also has the effect of reducing the cost of the composite material.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a billet according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a state in which a reinforcing material is attached to the base metal foil in the above embodiment, and FIG. 3 is a tensile strength characteristic diagram. FIG. 4 is an elongation characteristic diagram, and FIG. 5 is a sectional view showing a flat billet according to another example. 1. Billet, 2. Base metal foil, 3. Reinforcement material. Agent: Patent Attorney Tadashi Sato 1st figure 1: Bi° 7th 2: q nail metal stone 3; strong bladder 2nd figure 3 Fig. 4 kg/mm2% C test, ``yMx&'' (Fig. 5

Claims (1)

[Claims] In the manufacturing method of a metal matrix composite material consisting of a base metal and a reinforcing material of whiskers or short fibers, the reinforcing material is attached onto the base metal foil, the reinforcing material-attached metal foil is made into a laminate, and the outer periphery is encapsulated. A method for producing a metal matrix composite material, which comprises combining a base metal and a reinforcing material by heating and extruding or rolling the material.