JPS6188944A - Production of fiber reinforced metallic composite material - Google Patents

Abstract

PURPOSE:To produce easily and continuously a fiber reinforced metallic composite material with an inexpensive installation of a small floor area by inserting a continuous fiber bundle into a cavity, feeding and impregnating forcibly a molten metal to be constituted as the matrix to the fiber bundle from the intermediate small cavity and drawing the fiber bundle. CONSTITUTION:The continuous fiber bundle is inserted into the cavity 2 having coolers 5, 6 at the front and rear and a heater 9 in the intermediate part. The molten metal 12 to be constituted as the matrix is forcibly fed and impregnated by a plunger 4 to the bundle in the intermediate from the small cavity 3 having a heater 10, then the bundle is drawn by rolls 8. The fiber bundle 11 is easily made into the fiber reinforced metallic composite material with the inexpensive installation having the small floor area.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a method for manufacturing fiber-reinforced metal composite +41''I.

Conventional technology Fiber-reinforced metal composite material made by reinforcing metal with reinforcing fibers (
FRM) has attracted attention in various fields because it has higher specific strength and specific modulus than materials made only of metal.

There are various ways to produce such l2RM, but
In recent years, methods such as high-pressure casting have been attracting attention.

The high-pressure casting method involves placing an aggregate of reinforcing fibers into a mold cavity, then pouring molten metal to form a matrix into the cavity, applying pressure to impregnate the aggregate, and solidifying it, that is, casting it.

According to this method, an FRM with higher specific strength and bullet penetration rate can be obtained compared to other methods such as ion blasting, vapor deposition, diffusion bonding, powder metallurgy, foil metallurgy, and sintering. It is said that. However, on the other hand, it has the disadvantage that it is difficult to manufacture long objects. That is, in the high-pressure casting method, the molten metal is poured into the cavity of the mold and then solidified within the cavity, so it is impossible to make a product larger than the cavity. In theory, it would be possible to use a very large value of 3+1, but in practice this is almost impossible.

On the other hand, the inventors of this invention have previously described 1. i cho nrl b
In the application No. 8-137638, a method was proposed in which 13. After inserting a continuous fiber bundle of reinforcing fibers into the plastic cavity from the upper end, molten metal that will become the matrix is poured into the cavity, pressurized with a plunger that engages the cavity, impregnating the continuous fiber bundle, solidifying it, and forming a composite. However, this method has drawbacks as explained below.

That is, in the conventional method described above, a mold having a vertically elongated cavity is used, and the molten metal poured into the cavity is pressurized by a plunger that engages with the cracking hole.
It is necessary to use a plunger that is positioned to the right of the hole through which the thread bundle is inserted, but it is not easy to equalize the descending speed of the plunger and the moving speed of the thread bundle.
(If the bundle is slack in the cavity, plunge r and 1%'
4. There is a drawback that the sliding with the ki 11 bundle cannot be done smoothly, making it difficult for the kikinu bundle to descend, resulting in a 4T. In addition, when trying to manufacture better FRM, since the mold is vertically long, it is necessary to manufacture from a high place such as the 2nd or 3rd floor downwards, which requires large-scale equipment. There is also the problem of becoming.

Problems to be Solved by the Invention The present invention aims to solve the above-mentioned drawbacks of the conventional method and to provide a method that can easily manufacture a better FRM.

Means for Solving the Problems In order to achieve the above object, the present invention uses an oblong mold having a cavity extending from one end to the other end, and having a small cavity branching from the cavity, A continuous m string bundle of reinforcing lIN is inserted into the cavity from one end thereof, and a matrix and molten metal are press-fitted into the cavity from the small cavity tee to impregnate the wire bundle and solidify to form a composite. The manufacturing method of the fiber reinforced metal composite 11 is as follows:
? Served.

To explain the method of the present invention in more detail, in the present invention, a mold 1 of tδ [(with a cavity 2 extending from one end to the other end) as shown in the drawings is used.The cross-sectional shape of the cavity 2 is is determined depending on the cross-sectional shape of the FRM to be manufactured, but is usually circular, oval, or rectangular.
1, a small cavity 3 is provided in the center thereof, which is substantially perpendicular to and communicates with the crevice 2. A plunger 4 is fitted into this small cavity 3. Further, a heater 9 is attached to the -1V bit 2, and a heater 10 is attached to the small cavities 3G, . Furthermore, type 1
Cold 7JI equipment such as water jackets are installed at both ends of the 7i 9'
), 6 are attached, a supply roll 7 is provided at the front, and a drawing roll 8 is provided at the receiving side. However, the cooling device 5.6 described above is not necessarily required.

Now, first operate heater 9, -1: v bit 2,
The part heated by the heater 9 in F is heated to a temperature of about 1200° C. from the melting point of the 7-trix metal. In addition, the heater 10 is operated, and the small crack bit 3 is 10 times above the melting point from the melting point of the metal that is connected to the matrix 4.
Heat to a temperature of about 0°C.

Next, a continuous reinforcing fiber is inserted into the cavity 2 from the supply roll 7 to the drawing roll 8.
Pass through bundle 11. However, in the present invention, heating by the heaters 9 and 10 may be performed after passing the il spun fiber bundle 11.

Next, the molten metal 1 that will become the matrix is placed in the small cavity 3.
2 is added using the plunger 174 to impregnate the continuous fiber bundle 11. At this time, the molten metal 12 flows inside the cavity 2 toward the cooling device 5 side and the cooling device side, but the heating range by the heater 9 is limited, and cooling is required as necessary. Mold 1 with equipment 5.6
Although it is in a molten state approximately in zone Z, it solidifies near both ends of the heater 9, and this serves as a seal, so that it does not leak out from both ends of the cavity 2. 4T Oh, #II I- by Blancito 4
The power is 11゛h II, but usually it is 300-150
0KQ/cm2 culm 1α was selected.

When the molten metal 12 is impregnated into the bundle 11 of the continuous chess zero 11 and solidified, the composite, that is, FRM, is treated as a continuous pull roll.

In the above, the reinforcing fibers are those commonly used in F'RM, such as carbon rot, carbonized fiber, alumina fiber, boron cloth, and metal FQ IF. These reinforcement games are Ren V, 4111
1 and 85, and in the state of the medium thread, it is L no filament 1 or multifilament. The continuous vc<a bundle is made by pulling the desired number of reinforcing fibers lff1 in one direction. However, the above reinforcement? It is not necessary to use only one type of ft, but at least two
The crosspiece tll east may be formed by aligning different types of reinforcing fibers.

The metals that form the matrix are also those commonly used in RM. In this way, the molten metal can be washed when poured into the small cavity in order to suppress the reaction with the reinforcing materials and prevent the reinforcing fibers from deteriorating. It is preferably as low as possible, and it is preferably selected within a range from the melting point of the metal to about 150°C above the melting point.

In the above, we have explained the case where a small cavity that is approximately perpendicular to the cavity is used and the molten metal is impregnated from a direction perpendicular to the fiber axis direction of the continuous fiber bundle. Alternatively, it may be arranged in a direction opposite to the moving direction and impregnated from a direction oblique to the $1i if axis direction.

Furthermore, it is preferable to actively cool the upper part of the small cavity or to make the small cavity longer, since this can prevent the molten metal from spouting out from the gap between the plunger and the mold.

EXAMPLE Using the mold shown in the drawings, an r:' RM made of carbon and aluminum alloy was continuously produced.

In other words, Toshi Co., Ltd.'s carbon fiber cord "1~Reki" M40
One fiber bundle is made by bundling 230 (6000 medium threads)
1, and this was supplied to ↑17 Bitey 2 of mold 1 at a speed of 100 m/'min. Na; J3, kitl bitty 2 has a diameter of 1
0 mm circular cross-sectional shape (1) The heating temperature by the Peter 9 was approximately 750°C, and the heating temperature of the small cavity 3 by the heater 10 was approximately 650°C.
The cooling device 5.6 was not used.

Next, while continuing to fit 1 bundle of continuous fit Ilt, insert aluminum alloy (JI3 Δ〇4C) into the small cavity 3.
) is poured into the molten metal (temperature: approx. 750'G), and a pressure h^ of approx. 500 KO/Cm2 is applied to the plunger 4r to impregnate the bundle 11 of the continuous brush 11 to form a composite, that is, rRM. It was continuously pulled by an i-roll 8 at a speed of 100 m/min. The 1"1 FRM had a rod shape with a diameter of about 1 Qmm, and its carbon conductor 1^ content was about 60%.

Next, from the above F RM, length 8 along the long direction of the
A test piece of Qmm, width 9mm, and thickness 2mm was cut out, and a three-point bending test was performed on the test piece, and the bending strength was about 104K (J/mm2).

Effects of the Invention The method of this invention uses an oblong mold having a chirality extending from one end to the other and a small cavity branching from the cavity, and press-fits a molten metal to form a matrix from the small cavity. Since the continuous in-bundle in the cavity is impregnated, it is not necessary to make the moving speed of the plunger and the moving speed of the fiber bundle strictly equal, as in the above-mentioned conventional method. In addition, since a horizontally long mold is used, even when manufacturing a long FRM, there is no need to cover the manufacturing from a high place such as the second or third floor downwards, unlike the conventional method using a vertically long mold. 7 is cheaper in terms of equipment as all you have to do is secure the floor space.

[Brief explanation of drawings]

The drawing is a schematic cross-sectional view showing how the method of the present invention is carried out. 1: Mold 2: Cavity 3: Small crack 4 Ni lunge 5.6; Cooling device 7: Supply roll 8'; Molten metal patent producer Toshi Co., Ltd.

Claims (1)

[Claims] A horizontally elongated mold having a cavity extending from one end to the other end and a small cavity branching from the cavity is used, a continuous fiber bundle of reinforcing fibers is inserted into the cavity from one end, and the reinforcing fibers are inserted into the cavity from the small cavity. Production of a fiber-reinforced metal composite material, characterized in that a molten metal serving as a matrix is press-fitted into the fiber bundle, impregnated into the fiber bundle, solidified to form a composite, and the composite is pulled out from the other end of the cavity. Method.