JPS61257441A - Metallic composite material reinforced with fiber - Google Patents

Abstract

PURPOSE:To obtain the titled material having high interface bonding strength, by using inorganic fiber as reinforcing fiber, and Zn base alloy in which specified ratios of metal such as Cu, Mn, Sb, Ag, Li are added, as matrix. CONSTITUTION:In the titled material, inorganic fiber such as carbon fiber, silicon carbide fiber, alumina fiber is used for reinforcing fiber. For the matrix metal, Zn base alloy composed of metal of >=one kind selected from group of <=20% Cu, <=30% Mn, <=30% Sb, <=10% Ag, <=5% Li, <=5% Ti, <=5% Si, <=5% Ni, <=3% Cr and the balance Zn is used. In this way, matrix metal is not brought into reaction with fiber during compositing and interface bonding strength is raised.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a fiber-reinforced metal composite material reinforced with inorganic fibers.

[Technical background of the invention and its problems]

In recent years, research on fiber reinforced metal composite materials (hereinafter also referred to as FRIJ) has been carried out in many fields. This FRM
A/gold alloy is most commonly used as the matrix metal, and ur-gold alloy, Cu alloy, Ti alloy, etc. are also used in some cases.

Furthermore, inorganic fibers such as carbon, silicon carbide, and alumina are often used as reinforcing fibers.

By the way, problems with the production of this FRu include ensuring that the strength of the fibers does not deteriorate during compositing and that the wettability between the matrix metal and the fibers is good.

A/If the gold alloy matrix metal is used and carbon fiber or silicon carbide fiber is used as the reinforcing fiber, the reinforcing fiber and the matrix metal will cause an interfacial reaction when composited, forming carbide, which will reduce the strength of FRIJ. It has been reported (for example, JP-A-56-16636, JP-A-57
-164946). On the other hand, Zn and AI are matrix metals that do not have such drawbacks and have a high interfacial bonding strength between the reinforcing fibers and the matrix metal! '! Take Zn and V
An alloy containing l as a main component is known (Japanese Unexamined Patent Publication No. 57-1
(See Publication No. 64'146). Although this alloy is disadvantageous in that it is lighter in age than the A2 alloy or the Mf alloy, the strength of FR)J is significantly improved.

[Purpose of the invention]

Similarly to the above, the present invention is to discover a new matrix metal that does not react with fibers during compositing in FRM production and has high interfacial bonding strength, and to provide a fiber-reinforced metal composite material using this matrix metal.

[Summary of the invention]

That is, the present invention uses inorganic fibers such as carbon fibers, silicon carbide fibers, alumina fibers, or metal oxides, carbides, and nitrides as reinforcing fibers, and contains Cu of 20 or less and 30%.
Mn below, 30% Sb below, A1.5 below 10%
Li below 5%, Ti below 5%, Si below 5%, 5%
This is a fiber-reinforced metal composite material whose matrix metal is a Zn-based alloy consisting of one or more metals selected from the following N1.3% or less crO group and the balance being Zn.

The strength of these MA) IJx alloys FRV varies slightly depending on the composition of the alloy, but
Zn-Al or Zn-V shown in No. 6? Alloy FR
Shows strength equivalent to I〆.

All of these alloys have little interfacial reaction with carbon fibers, silicon carbide fibers, alumina fibers, etc. when composited, and even when immersed in IJ Knox molten metal. Since there is little strength deterioration, preforms with large cross sections can be manufactured continuously in the molten metal.

This preform is processed by semi-melting forging, pot press, HI
When molding with P etc., it can be molded at low pressure and is low cost.
, R1, (manufacture is possible.

(1) Carbon fiber (specific gravity approximately 1.8) in reinforcing fiber and l~
, silicon carbide fiber (specific gravity of about 2.5), and alumina fiber (specific gravity of about 32) are the common ones currently manufactured.
Either of these can be applied. Other inorganic fibers such as metal oxides, carbides, and nitrides may be used as long as they are lighter and stronger than iron-based metals. Metallic fibers such as stainless steel are excluded from the present invention because they cannot be expected to have a sharpening effect.

(2) Matrix metals include Zn-Al, ZD-
M? This is a Zn-based alloy excluding alloys and alloys containing Ba, Bi, and Sn of coefficient 5 or less. The above-mentioned alloy components are shown as specific examples.

The basis for this is explained below.

(1) Cu improves matrix strength, creep resistance,
It is effective in improving wear resistance, etc., but if it exceeds 20%,
II) has no toughness, and the tensile strength of FR1i4 is also 90K.
g/mm or less.

(11) Yama is an alloy with high strength and excellent wear resistance.
A 5% Mn alloy is known, and FRMs of this alloy matrix exhibit high strength.

However, when Mn exceeds 30, the strength of FRl, ( decreases.

(ill)Sb, Af, Li, Tt, s]+Ni
+Cr has a tensile strength of FRM of 90 Kg/ynx2
The limit showing the above was set as the upper limit. The tensile strength of F'RIi (90 Ky/mm") is considered to be almost the same as the standard of bending strength of 120 Kq/my" shown in JP-A-57-164946.

[Example 1] Diameter 13 μm 1 filament number 500, tensile strength 2
By the composite method shown in Figure 1, silicon carbide fibers of 60 KtJrnm2 and matrix metals shown in Table 1 were combined to obtain fiber volume fraction (
A round bar FRMi with a diameter of 6.0 mm and a Vf ) of 50 inches was manufactured. Table 2 shows the fiber direction tensile strength and density of this round bar. Furthermore, the temperature of the molten IJx alloy is
The test was carried out at 30°C above the liquidus line.

Light 1 Table 2 As shown above, Alloys Nos. 1 to 3 were lighter than iron-based metals and exhibited a tensile strength of 100 KgAvt2 or more.

[Example 2] Diameter 7 μm 1 filament number 3000, tensile strength 2
FRIJ similar to [Example 1] was manufactured using 50 Kg//mrn' of PAN-based high modulus carbon fiber and IJ socks shown in Table 3. Table 4 shows the tensile strength and density of this F'RM.

Table 3 Table 4 Similar to [Example 1], Alloys Nos. 1 to 3 were lighter than iron-based metals and exhibited a strength of 100 Kq/m- or more.

FIGS. 1 and 2 are examples of an apparatus that performs the first step in producing FRlv[. In the figure, 1 is a vacuum container, and a melting furnace 2 for matrix metal is installed inside this vacuum container 1.

Furthermore, a die 3 is provided at one end of the vacuum container 1 and the melting furnace 2 . Further, within the vacuum container 1, rows 24 and 5 for supplying fibers are arranged at the rear side of the melting furnace 2. Note that 6 is a vacuum pump that communicates with the inside of the vacuum container 1.

To explain the case of manufacturing FRM using this device, first, the reinforcing fibers 7, which are opened into a thin sheet shape with an average size of 70 μm or less by rollers 4 and 5, are guided into the melting furnace 2, and then melted in the melting furnace z. immersed in the matrix metal 8. And fiber 7 and matrix metal 8
After compounding, it is passed through a die 3 and continuously drawn out. As a result, a wire-shaped composite material 9 having a diameter of 0.40 to 0.55 mtn is obtained. Further, at this time, the inside of the vacuum container I is under a vacuum atmosphere of 10 to 10 Torr.

Therefore, it is possible to protect against chemical and physical adverse effects.

FIG. 3 and FIG. 4 show an apparatus for a later step of manufacturing a composite material 10 of a specific shape from the wire-shaped composite material 9 described above.

That is, this device is a melting furnace 11 for matrix metal installed in the atmosphere, and a die I is installed on the side wall of the furnace 11.
2 is provided.

The wire-shaped composite material 9 is then transferred to the melting furnace 1 again.
After being immersed in the molten matrix metal 12 in 1, it is passed through a die 13 to form a composite material IO having a large cross section of round, square or specific shape.

M) Even if the fibers are in contact with the IJ socks molten metal for a long time during compositing, there is little deterioration in the strength of the fibers, so it is possible to continuously manufacture preforms with large cross sections in the molten metal.

Using this preform, molding can be performed at low temperatures and pressures, making it possible to reduce costs.

Note that this FRIJ has better heat resistance than F'RP, and is also lighter and stronger than iron-based metals, so it is suitable for, for example, connecting rods and piston pins of engine parts.

〔Effect of the invention〕

As can be seen from the above description, according to the present invention, FR1
There is no reaction with fibers during compositing in VF production, and the interfacial bonding strength can be increased, and products with a large cross section of a specific shape can be manufactured easily and at low cost. In general, it can be made lighter and stronger than iron-based metals.

[Brief explanation of drawings]

FIG. 1 is a plan view of a front-stage device for producing FRM, FIG. 2 is a side view thereof, FIG. 3 is a plan view of a second-stage device for producing FRu, and FIG. 4 is a side view thereof. 7...Fiber, 8...Matrix gold@, 9...Composite phase, 10...Hariagoji, 12...Matrix metal. Applicant's agent Patent attorney Takehiko Suzue @
Ward P-('J taste group C ward ward cf'> Dimension group
taste

Claims (1)

[Claims] Inorganic fiber is used as reinforcing fiber, Cu of 20% or less, 30%
% or less Mn, 30% or less Sb, 10% or less Ag,
5% or less Li, 5% or less Ti, 5% or less Si, 5
A fiber-reinforced metal composite material characterized in that the matrix metal is a Zn-based alloy consisting of one or more metals selected from the group of % or less Ni, 3% or less Cr, and the balance Zn.