JPS6267136A - Production of metallic composite material - Google Patents

Abstract

PURPOSE:To obtain efficiently and inexpensively a composite material with reduced energy consumption by impregnating a base metal into a preform of ceramic short fibers, particles, whiskers, etc. and continuously molding the same while controlling the temp. to the half-melting temp. of the base metal. CONSTITUTION:For example, a preform billet 1 of SiC whiskers as a ceramic reinforcing material is formed and is heated to about 580-600 deg.C, then the billet is inserted into a casting mold container 2 onto pure Al 3 provided in the lower part of the container. Molten 6061Al 4 as the base metal kept at about 690-710 deg.C is then poured into the preform 1 and the container 2 is soaked and held at about 480-500 deg.C by separately provided heaters, by which the molten base metal is impregnated under the pressure into the preform. The molten metal is continuously extruded under the prescribed extrusion pressure by a plunger from a die 5 provided in the lower part of the container 2, by which a long-sized material 6 as the metallic composite material is obtd.

Description

[Detailed description of the invention] [Industrial application field] The present invention consists of one particle of metal and ceramic short fibers.

The present invention relates to a method of manufacturing a composite material with whiskers and the like.

[Conventional technology]

Conventionally, elongated materials and shaped materials of metal matrix composites of metal and ceramics have been produced using methods such as (1) extrusion or forging of melt-forged materials of metal and ceramics;

(2) A method of impregnating a preformed product shape with molten metal.

(3) A method in which a mixture of base metal powder and reinforcing material is heated to a semi-melting temperature and then extruded or forged.

A manufacturing method was proposed by et al.

However, these conventional methods have the following problems. That is, the method (1) requires heating operations twice, at the time of creating the material and during the forging process, and requires improvement in terms of energy saving and efficiency.

Regarding the method (2), it is difficult to create and impregnate a preform with a complicated shape.

Although method (3) has improved energy and efficiency, it is difficult to mix the base metal powder and reinforcing material uniformly, especially when mixing with whiskers etc. Uniform mixing is not possible unless the powder is finely ground, so there are drawbacks such as high costs due to the relatively high cost of pulverizing the base metal powder.

[Problem that the invention seeks to solve]

The present invention was made to solve the problems of the prior art described above, and consists of one particle of metal and ceramic short fibers,
The purpose of this invention is to provide a method for manufacturing a metal matrix composite material that efficiently and inexpensively manufactures a composite material with whiskers and the like.

[Means for solving problems]

The present invention provides short ceramic fibers, ceramic particles,
This is a method for manufacturing metal matrix composite materials in which a preformed object with a simple shape such as a whisker is impregnated with a base metal or molten metal, and then extruded or forged. This is a method for producing a metal matrix composite material in which the temperature of the composite material is controlled to a temperature suitable for processing by adjusting the temperature of the molten metal to the semi-melting temperature of the base metal.

[Effect]

As shown in the Examples described below, the present invention involves separately preparing individual preforms of ceramic short fibers, ceramic particles, whiskers, etc., and charging them into a mold container maintained at a semi-melting temperature of the base metal. The preform is poured into a preform and impregnated with base metal, and then continuously extruded or forged into a solid shaped material.

The preformed body may be preheated to a semi-melting temperature of the base metal and then charged into the mold container.

The present invention impregnates the preform while controlling the temperature of the container to the semi-melting temperature of the base metal and processes it continuously. Therefore, it is possible to uniformly impregnate the preform with the base metal and continuously process the preform. It is possible to process metal matrix composite materials that are superior in terms of energy and efficiency.

Furthermore, in processing, elongated materials can be continuously manufactured by extrusion, and complex-shaped materials can be manufactured by forging.

Various metals such as aluminum and iron can be used as the base metal, and the base metal is not limited to the examples described below.

Next, examples will be described.

〔Example〕

1. FIG. 1 is an explanatory diagram of an embodiment of the present invention in the case of extrusion molding.

As shown in Fig. 1, a preformed billet 1 of SiC whiskers (70MNψ×volume content Vf=20%) 1 was prepared in advance as a ceramic reinforcement material, and the preformed billet 1 was heated at 580 to 600°C. 6061Al molten metal 4 as a base metal at 690 to 710°C is poured onto the SiC whisker preform 1, and the mold is heated to 4 by means of a separate heater (not shown)
The temperature is soaked at 80 to 500°C, the impregnation is carried out under pressure, and the die 5 (1511
9/lnd to extrusion pressure 10 with plunger from φ)
A long material (15i
+mψ)6 was obtained.

The strength and elongation of the obtained elongated material 6 are shown in Fig. 5 and Fig. 6, respectively, in comparison with the conventional method.

In the conventional method, the same materials and sizes as in the above embodiments were used, a billet was created by a molten metal forging method, and after reheating, it was extruded at 480°C.

2. FIGS. 2 to 4 are explanatory diagrams of embodiments of the present invention in the case of forging each corner-shaped product, respectively.

The same SfC whisker preform and base metal materials were used as in the extrusion example described above, and the same impregnation temperature and forging temperature were used.

In the method shown in FIG. 2, a concave material product having the product shape shown in FIG. 7 is produced, and in FIG. 3, a T-shaped material product having the product shape shown in FIG. In , the impregnated metal-based composite material 7 was forged using a bonchif and 7' to obtain a cross-shaped material product having the product shape shown in FIG.

These various shaped composite materials of Al and SiC whiskers could be molded without cracking during processing.

〔Effect of the invention〕

According to the method for producing a metal matrix composite material of the present invention, the base metal is uniformly mixed with reinforcing materials such as two short fiber particles of Nanau Mix and whiskers, and by continuously extruding or forging, energy is generated. Moreover, it is possible to efficiently produce long forged products with excellent properties or forged products of various shapes with low wires.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of Example 1 of extrusion molding, Figures 2-
FIG. 4 is an explanatory diagram of Example 2 in which each forge is formed. Figures 5 and 6 are graphs of the relationship between the strength and elongation of extrusion molded products in Examples and conventional methods, respectively, and temperature, and Figures 7 to 9 are graphs of products corresponding to Figures 2 to 4, respectively. It is an explanatory diagram of a shape. In the figure, 1: Preformed body 2: Container 3 Nialuminum 4: Base metal 5: Die 6: Metal matrix composite material 7
．． 7': Bonchi agent patent attorney Masaru Sato 5th rl to cXJ! J 1<Deaf u counterfeit test 51 Karasu

Claims (3)

[Claims] (1) A preformed body made of short ceramic fibers, particles, whiskers, etc. is impregnated with a base metal, and the impregnation temperature is controlled to the semi-melting temperature of the base metal, and the body is continuously shaped. A method for manufacturing a metal matrix composite material. (2) The method for producing a metal matrix composite material according to claim 1, wherein the molding is performed by extrusion molding. (3) The method for producing a metal matrix composite material according to claim 1, wherein the forming is performed by forging.