JPH0665734B2 - Metal-based composite material with excellent friction and wear characteristics - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to composite materials, and more particularly to metal matrix composite materials in which a matrix metal is composited with a reinforcement and a solid lubricant.

Conventional technology Generally, in the case of fiber-reinforced metal composite materials and particle-dispersed metal composite materials that have been composite-reinforced with a reinforcing material such as reinforcing fibers or dispersed particles to improve the specific strength and wear resistance of the metal material, a reinforcement material is generally used. However, there is a problem in that the amount of wear of the mating material that abuts on and relatively slides against the matrix metal is likely to be larger than that of the material composed only of the matrix metal that is not composite-reinforced by the reinforcing material.

In order to solve such a problem, for example, JP-A-53-102824,
54-64263, 58-93844, 58-93845, 58
-93847, 58-113335, 59-59855, 59-59
As described in Japanese Patent No. 856, it is already known to add an antifriction substance having excellent self-lubricating property to a composite material. According to such a composite material, it is possible to obtain a metal material having excellent friction and wear properties, that is, both excellent wear resistance and opponent attacking property, as compared with a composite material containing no antifriction substance.

Problems to be Solved by the Invention However, according to the results of the experimental research conducted by the inventors of the present application, the friction and wear characteristics of the composite material are sufficiently increased depending on the type and amount of the added antifriction material. It has been found that not only can it not be improved, but the frictional wear characteristics and strength of the composite material can deteriorate. That is, some of the friction-reducing substances are suitable for the metal-based composite material and some are not. Therefore, the friction-reducing substance suitable for the composite material must be selected. It does not relate to design matters that may be arbitrarily set by those skilled in the art when manufacturing the composite material as described above. ,
It was found that the size and volume ratio must be set optimally in relation to each other.

For example, the above-mentioned JP-A-58-93844, JP-A-58-93845, and JP-A-58-93845.
In each of the publications of -93847, it is indicated that particles such as graphite or particles such as lead, zinc and tin may be used as the anti-friction material, but the anti-friction material is particles such as graphite. In some cases, if the diameter is large, the composite material itself becomes brittle, and the wear amount of the composite material and the mating material increases due to the increase of abrasion powder, and the strength of the composite material also decreases. .
Also, in the case of particles of lead, zinc, tin, etc., these particles are likely to melt and segregate in the composite material during the production of the composite material, so a sufficient lubrication effect cannot be obtained and the friction and wear characteristics of the composite material Is difficult to sufficiently improve, and the strength of the composite material is likely to decrease due to segregation. Further, since such a problem is remarkable in the melt impregnation method and the sintering method which have been generally adopted for the production of the composite material, the composite material containing these antifriction substances is satisfactorily produced by these methods. Is difficult.

Further, the above-mentioned JP-A Nos. 53-102824, 54-64263, and 58.
-113335, 59-59855, and 59-59856, the hardness of the reinforcing material is increased even when an antifriction material suitable for the composite material is used, such as the solid lubricants. If it is less than a certain value, the amount of wear of the composite material itself will be large (the amount of wear will be larger than if it does not contain an antifriction substance), and the amount of wear of the mating material will also be large due to the generation of wear powder. Become. Further, even if the hardness of the reinforcing material is a certain value or more, if the diameter is more than a certain value, the opponent attack of the composite material is large, which results from the generation of abrasion powder. As a result, the amount of wear of the composite material itself also increases. Further, if the amount of the reinforcing material is too small, the hardness of the solid lubricant is low, so that the amount of wear of the composite material becomes larger than that of a normal composite material containing no solid lubricant. On the contrary, when the amount of the reinforcing material is too large, even if the amount of the solid lubricant is increased, the opponent attack of the composite material is not reduced.

Furthermore, when the hardness of the solid lubricant is above a certain value,
As a matter of course, the opponent attack of the composite material is increased. In addition, even if the hardness of the solid lubricant is an appropriate value, if the diameter is large, the composite material itself becomes brittle, and the amount of abrasion powder increases, resulting in an increase in the amount of wear of the composite material and the mating material. However, the strength of the composite material also decreases. Furthermore, even if the hardness of the solid lubricant is an appropriate value, if the amount is too small, it is not possible to sufficiently reduce the opponent attack of the composite material. Conversely, if the solid lubricant is too large, The composite material becomes brittle, the amount of wear of the composite material itself increases, and the amount of wear of the mating material also increases due to the generation of wear powder.

Further, JP-A-53-102824 discloses a composite material composed of a Cu alloy compounded with carbon fiber and another self-lubricating agent, wherein the Cu alloy is a composite material containing Sn, Zn and Pb. Have been described. According to this composite material, the friction and wear characteristics of the composite material can be improved as compared with the case where the Cu alloy is not composited with another self-lubricant or the case where the Cu alloy does not contain Sn, Zn, or Pb. However, this composite material has a problem that the matrix metal is limited to the Cu alloy and the composition of the Cu alloy must be adjusted so as to contain Sn, Zn, and Pb.

The present invention is a metal-based composite material that is based on the knowledge obtained as a result of the experimental research conducted by the inventors of the present application and is further excellent in friction and wear characteristics as compared with a conventionally known composite material containing a solid lubricant. Thus, an object of the present invention is to provide a metal-based composite material that does not have a problem that the matrix metal is limited to a specific type of metal or the composition of the matrix metal needs to be adjusted.

According to the present invention, a volume selected from the group consisting of short fibers having a Mohs hardness of 6 or more and a diameter of 30 μm or less, and a mixture thereof, is provided. Rate 1-40%
Reinforcement material with Mohs hardness of 4.5 or less and diameter of 100 μm
A metal matrix composite material in which a matrix metal is composited by a substantially uniform mixture with a solid lubricant having a volume ratio of 3 to 50% selected from the group consisting of short fibers, particles, and mixtures thereof, Reached

According to the present invention, the matrix metal is compounded by the substantially uniform mixture of the reinforcing material and the solid lubricant, and the Mohs hardness, diameter, and volume fraction of the strong material and the solid lubricant are relative to each other. Since it is set within the above-mentioned preferable range in relation to the friction and wear characteristics as compared with the conventional composite material, as will be apparent from the results of the experimental studies conducted by the inventors of the present application which will be described in detail later. An excellent metal-based composite material can be obtained, and the problem that the matrix metal is limited to a specific type of metal and the necessity of adjusting the composition of the matrix metal can be eliminated.

According to one particular feature of the invention, the matrix metal is a metal selected from the group consisting of aluminum, magnesium, copper, zinc, lead, tin and alloys based on any of these.

According to one particular feature of the invention, the solid lubricant is any of oxides, sulfides, nitrides, graphite, and mixtures thereof. Suitable oxide solid lubricants in the present invention include tungsten oxide (WO ₃ ), zinc oxide (ZnO), lead monoxide (PbO), tin oxide (SnO), cuprous oxide (Cu ₂ O) Etc., sulfide solid lubricants include molybdenum disulfide (MoS ₂ ) and tungsten disulfide (WS ₂ ), and nitride solid lubricants include boron nitride (BN).

According to yet another detailed feature of the invention, the diameter of the reinforcement is set to 20 μm or less, and the Mohs hardness and diameter of the solid lubricant are set to 4 or less and 50 μm or less, respectively.

According to still another detailed feature of the present invention, the Mohs hardness and diameter of the reinforcing material are set to 7 or more and 20 μm or less, respectively, and the Mohs hardness, diameter, and volume ratio of the solid lubricant are 3 or less and 50 μm, respectively. Below, it is set to 5-40%.

According to yet another detailed characteristic of the present invention, the volume ratio of the solid lubricant is set to 10 to 40%.

The fiber length of the reinforcing material and the solid lubricant short fibers in the composite material of the present invention is preferably about 10 μm to 5 cm. Further, according to the results of the experimental research conducted by the inventors of the present application, in the case where the reinforcing material or the solid lubricant is short fibers, if they satisfy the requirements of the present invention, the orientation of the short fibers However, the amount of wear of the composite material and the mating material can be reduced, and thus the orientation of the short fibers may be any of unidirectional orientation, two-dimensional random orientation, and three-dimensional random orientation.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Example 1 What kind of hardness is suitable for the reinforcing fiber was examined.

First, as shown in Table 1 below, shredded fibers A _{1 to} A ₅ having various Mohs hardnesses were prepared. Next, each fiber and BN particles were mixed at a volume ratio of 2: 3, and the mixture was stirred in colloidal silica. Then, by performing compression molding on the colloidal silica in which the fibers and particles thus obtained are uniformly dispersed, as shown in FIG. 1, the reinforcing fibers 2a and the BN particles 2b are uniformly mixed with each other.
A molded body 1 having a size of × 80 × 20 mm was formed.

Then, after preheating the molded body to 500 ° C., it is placed in the mold cavity 4 of the mold 3 as shown in FIG. 2, and the aluminum alloy of 720 ° C. (JIS
A molten metal 5 of standard AC8A) was poured, and the molten metal was pressurized to a pressure of 1500 kg / mm ² by a plunger 6 fitted in the mold 3, and the pressurized state was maintained until the molten metal was completely solidified. Thus, as shown in FIG. 3, a cylindrical solidified body 7 having an outer diameter of 110 mm and a height of 50 mm is cast, and the solidified body is subjected to a heat treatment T _{7 so} as to be substantially three-dimensionally random from each solidified body. A composite material 1'composed of aluminum alloy composited with 10% by volume oriented reinforcing fibers and 15% by volume BN particles was cut out, and a block test piece A ₁ for wear test was made from each composite material.
~ A ₅ was created by machining.

Next, set each block test piece in the friction and wear tester in order, and take the spherical graphite iron (JIS standard FCD70, Hv = 25
0) and chrome steel (JIS standard SCr20, Hv = 720) are contacted with the outer peripheral surface of cylindrical test pieces, and the contact parts of those test pieces have lubricating oil at normal temperature (20 ° C) (castle motor oil 5W-30).
Supply pressure, contact surface pressure 20kg / mm ² , sliding speed 0.3mm / se
A wear test was conducted by rotating the cylindrical test piece for 1 hour at c.

The results of these abrasion tests are shown in FIG. In FIG. 4 (and the figures showing the results of other wear tests described later), the upper half is the wear amount of the block test piece (wear mark depth μ
m), and the lower half represents the wear amount (wear loss mg) of the cylindrical test piece as the mating material. The white bar graph and the hatched bar graph show the results of the wear test with spheroidal graphite cast iron and chrome steel, respectively.

From FIG. 4, when the mating material is spheroidal graphite cast iron or chrome steel and the Mohs hardness of the reinforcing fiber is 6 or more,
It can be seen that the wear amounts of both the composite material and the mating material are small.

Example 2 What kind of hardness was suitable for particles (hereinafter referred to as reinforcing particles) as a reinforcing material was examined.

First, reinforcing particles B _{1 to} B ₄ as shown in Table 2 below were prepared. Then, these particles and graphite particles were mixed in a volume ratio of 3: 4, and the mixture was used to obtain the reinforcing particles and the graphite particles in volume ratios in the same manner and conditions as in Example 1, respectively. 15% and 20% composite materials were produced, block test pieces B _{1 to} B ₄ were prepared from these composite materials, and the block test pieces were worn under the same conditions and conditions as in Example 1. The test was conducted. The results of these abrasion tests are shown in FIG.

From FIG. 5, it can be seen that even when the reinforcing material is particles, the wear amount of the composite material and the mating material has a small value when the Mohs hardness is 6 or more.

Example 3 What hardness was suitable as the solid lubricant was examined.

First, solid lubricants as shown in Tables 3 and 4 below.
C _{1 to} C ₆ (D _{1 to} D ₆ ) were prepared. Then the solid lubricant C ₁ -C ₆
And alumina fibers are mixed at a volume ratio of 1: 1 and the matrix metal is an aluminum alloy of JIS standard AC1A (hot water temperature 720
℃), except that the heat treatment was changed to T ₆
Under the same conditions and conditions as in Example 1, a composite material in which the volume ratio of the solid lubricant and the alumina fiber was both 15% was produced, and block test pieces C _{1 to} C ₆ were prepared from the respective composite materials.
An abrasion test was conducted on each block test piece under the same procedure and conditions as in Example 1. The results of these abrasion tests are shown in FIG.

In the above case, as shown in Table 4 below, block test pieces D _{1 to} D ₆ prepared under the same procedure and conditions except that the reinforcing material was replaced with titanium carbide particles.
Was subjected to a wear test under the same procedure and conditions as in Example 1. The results of these abrasion tests are shown in FIG.

From Figures 6 and 7, the Mohs hardness of the solid lubricant is 4.5.
It will be understood that the amount of wear of the composite material and the mating material becomes smaller when it is preferably 3 or less.

Example 4 What diameter was suitable as the reinforcing material was examined.

First, reinforcing materials E _{1 to} E ₉ as shown in Table 5 below were prepared. Then, except that the reinforcing material and the graphite particles were mixed at a volume ratio of 2: 3, the reinforcing material and the graphite particles had volume ratios of 10% and 15%, respectively, under the same conditions and conditions as in Example 1.
% Of the composite material, block test pieces E _{1 to} E ₉ were prepared from each composite material, and a wear test was performed on each block test piece under the same conditions and conditions as in the case of Example 1.
The results of these abrasion tests are shown in FIG.

It can be seen from FIG. 8 that the amount of wear of the composite material and the mating material decreases when the diameter of the reinforcing material is 30 μm or less, preferably 20 μm or less, regardless of whether the reinforcing material is fiber or particles.

Example 5 What kind of diameter is suitable as a solid lubricant was examined.

First, solid lubricants F _{1 to} F ₉ as shown in Table 6 below were prepared. Next, solid lubricant and alumina fiber are mixed in a volume ratio of 4: 3, and JIS standard A is used as a matrix metal.
C7B aluminum alloy (hot water temperature 690 ℃) was used, except that the heat treatment was replaced by T ₄ , the volume ratio of the solid lubricant and the alumina fiber were respectively the same as in the case of Example 1. 20% and 15% composite materials were manufactured, block test pieces F _{1 to} F ₉ were prepared from the respective composite materials, and a wear test was performed on each block test piece under the same conditions and conditions as in Example 1. went. The results of these abrasion tests are shown in FIG.

From FIG. 9, whether the solid lubricant is particles or fibers, the diameter of the solid lubricant is 100 μm or less, preferably 5 μm or less.
It can be seen that when the thickness is 0 μm or less, the wear amount of the composite material and the mating material becomes small.

Example 6 What value is appropriate for the volume ratio of the reinforcing material was examined.

First, silicon carbide whiskers G _{1 to} G ₉ shown in Table 7 below and tungsten carbide particles H ₁ shown in Table 8 as reinforcing materials.
~ H ₉ prepared. Then, these fibers and particles were mixed with graphite particles and BN particles shown in Tables 7 and 8 in various volume ratios, and the mixture thus obtained was used in the same manner as in Example 1 and Block test piece G _{1 under} conditions
~ G ₉ and H ₁ ~ H ₉ were created. In addition, a block test piece G ₀ (and H ₀ ) made of only the matrix metal containing no reinforcing material and solid lubricant was prepared. Then, a wear test was conducted on these block test pieces under the same procedure and conditions as in Example 1. The results of these wear tests are
Shown in Figures 10 and 11. 10 and 11 show the results of a wear test using spheroidal graphite cast iron and chrome steel as mating materials, respectively.

From FIG. 10 and FIG. 11, regardless of whether the reinforcing material is a fiber or particles, when the volume ratio of the reinforcing material is 1 to 40%, the wear amount of the composite material and the mating material becomes small. I see.

Example 7 What value is appropriate for the volume ratio of the solid lubricant was examined.

First, graphite particles I _{1 to} I ₉ as shown in Table 9 below were prepared. Then, these graphite particles and alumina fibers were mixed at various volume ratios, and the mixture was used to prepare block test pieces I ₁ to I in the same manner and conditions as in Example 1.
Created I ₉ . In addition, a block test piece I ₀ made of only a matrix metal containing no reinforcing material and solid lubricant was prepared. Then, a wear test was performed on these block test pieces under the same procedure and conditions as in Example 1. The results of these abrasion tests are shown in FIGS. 12 and 13. The 12th
Figure and Figure 13 show the results of the wear test using spheroidal graphite cast iron and chrome steel as mating materials.

From Figure 12 and Figure 13, the solid lubricant volume ratio is 3-50%.
It is understood that the wear amount of the composite material and the mating material becomes a small value in the case of.

Example 8 The friction and wear characteristics of a composite material containing two types of reinforcing materials or solid lubricants were examined.

Under the same procedures and conditions as in Example 1 above, alumina-silica fibers having a volume ratio of 10% (A _{4 in} Table 1) and silicon carbide particles having a volume ratio of 5% (E _{2 in} Table 5) were used. A block test piece J made of an aluminum alloy (JIS standard AC8A) composited with graphite particles having a volume ratio of 15% (Table 2) was prepared. Similarly, 5% by volume of alumina fiber (A _{3 in} Table 1)
And 10% by volume of potassium titanate whiskers (Table 3
A block test piece K made of an aluminum alloy (JIS standard AC8A) compounded with C ₄ ) and BN particles having a volume ratio of 15% (Table 1) was prepared.

For the purpose of comparison, a block test piece J ′ identical to the block test piece J was prepared except that graphite particles as a solid lubricant were not included, and potassium titanate whiskers and BN particles as a solid lubricant were prepared. A block test piece K ′ identical to the block test piece K except that it was not included was prepared.

Then, a wear test was performed on these block test pieces under the same procedure and conditions as in Example 1. The results of these abrasion tests are shown in FIG.

From Fig. 14, the wear amount of itself and the mating material is higher than that of the composite material containing no solid lubricant both in the case of containing two kinds of reinforcements and in the case of containing two kinds of solid lubricants. It turns out that becomes a small value.

Example 9 Friction and wear characteristics of a composite material in which a matrix metal was a magnesium alloy, a zinc alloy, a lead alloy, a tin alloy, and a copper alloy were examined.

First, Example 1 except that the temperature and pressure of the molten matrix metal were set to 690 ° C. and 1000 kg / cm ² , respectively.
Under the same procedure and conditions as in the case of No. ₃ , a magnesium alloy (JIS standard MDC1−) prepared by compounding 30% by volume alumina fiber (A _{3 in} Table 1) and 10% by volume graphite particles (Table 2)
A block test piece L ₁ consisting of A) was prepared.

Further, except that the hot water temperature and the pressurizing force were set to 500 ° C. and 1000 kg / cm ² , respectively, under the same conditions and conditions as in Example 1, 40% by volume of tungsten carbide particles (E _{5 in} Table 5). )
And a block test piece M ₁ made of a zinc alloy (JIS standard ZDC1) composited with 20% by volume of BN particles (Table 1).

Alumina-silica fibers having a volume ratio of 20% (Table 1) were prepared under the same procedure and conditions as in Example 1 except that the hot water temperature and the pressure were set to 410 ° C. and 1000 kg / cm ² , respectively.
Of A ₄₎ and the block test piece N ₁ consisting by volume of 50% of the BN particles (Table 1) and by which are complexes of lead alloy (JIS standard WJ8)
It was created.

Further, except that the hot water temperature and the pressurizing force were set to 330 ° C. and 1000 kg / cm ² , respectively, silicon carbide particles having a volume ratio of 5% (E _{2 in} Table 5 were prepared under the same conditions and conditions as in Example 1. ), And a tin alloy (JIS standard WJ2) compounded with potassium titanate whiskers (C _{4 in} Table 3) having a volume ratio of 5%, a block test piece O ₁ was prepared.

Furthermore, silicon nitride whiskers (manufactured by Tateho Chemical Industry Co., Ltd.,
Average fiber diameter 1 μm, average fiber length 0.1 mm, 99% or more Si ₃ N ₄ ,
The amount of particles having a particle size of 150 μm or more (0.1 wt% or less), the BN particles (Table 1), the copper alloy (Cu-10 wt% Sn) powder, and the volume ratio of the silicon nitride whiskers and the BN particles are 1% and 3 respectively. %, And mixed, a small amount of ethanol was added to the mixture, and the mixture was mixed with a stirrer for about 30 minutes. The mixture thus obtained is dried at 80 ° C. for 5 hours, then a predetermined amount of the mixture is filled in a mold, and the mixture is punched with 4000 kg.
A plate was formed by compressing at a pressure of / cm ² .
Then, the plate-shaped body was sintered by heating it at 770 ° C for 30 minutes in a batch-type sintering furnace set in a decomposed ammonia gas (dew point -30 ° C) atmosphere, and gradually cooled in a cooling zone in the sintering furnace. A composite material was manufactured by cooling, and a block test piece P ₁ was prepared from the composite material.

Further, for the purpose of comparison, block test pieces L _{0 to} P ₀ were respectively made from materials composed only of the matrix metal of the composite material of the block test pieces L _{1 to} P ₁ described above.

Then, a wear test was performed on these block test pieces by using a cylindrical test piece made of spheroidal graphite cast iron and chrome steel as a counterpart member under the same procedure and conditions as in the case of Example 1. The results of these abrasion tests are shown in Table 10 and Table 11 below. In these tables, the wear amount ratio of the block test pieces is the percentage of the wear amount of the block test pieces L _{1 to} P ₁ (wear depth μm) with respect to the wear amount of the test pieces L _{0 to} P ₀ , respectively. Meaning, the upper and lower numerical values of the wear amount of the cylindrical test piece are the wear amount (wear loss mg) of the cylindrical test piece rubbed with the block test pieces L _{1 to} P ₁ and L _{0 to} P ₀ , respectively.

From Table 10 and Table 11, even when the matrix metal is a magnesium alloy, a zinc alloy, a lead alloy, a tin alloy, and a copper alloy, the Mohs hardness and volume ratio of the reinforcing material and the solid lubricant are within the scope of the present invention. In the case of (1), it is understood that the wear amount of the composite material can be significantly reduced without substantially increasing the wear amount of the counterpart material as compared with the material made of only the matrix metal.

In the above, the present invention has been described in detail in relation to the experimental research conducted by the inventors of the present application, but the present invention is not limited to these examples and is within the scope of the present invention. It will be apparent to those skilled in the art that various other embodiments are possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing a molded body composed of reinforcing fibers and BN particles that are uniformly mixed with each other, and FIG. 2 is a composite material produced by high pressure casting using the molded body shown in FIG. Fig. 3 is a perspective view showing a solidification body formed by high pressure casting in Fig. 2, Fig. 3 is an aluminum alloy compounded with various reinforcing fibers and BN particles. FIG. 5 is a graph showing the results of the wear test performed on the composite material, and FIG. 5 is a graph showing the results of the wear test performed on the composite material made of an aluminum alloy composited with various reinforcing particles and graphite particles. FIG. 6 is a graph showing the results of an abrasion test conducted on a composite material composed of an aluminum alloy composited with various solid lubricants and alumina fibers, and FIG. 7 is a composite with various solid lubricants and titanium carbide. FIG. 8 is a graph showing the results of wear tests performed on a composite material composed of a modified aluminum alloy, and FIG. 8 is a composite material composed of a reinforcing fiber having various diameters and an aluminum alloy composited with reinforcing particles and graphite particles. A graph showing the results of the wear test carried out,
FIG. 9 is a graph showing the results of an abrasion test conducted on a composite material made of an aluminum alloy composited with solid lubricants having various diameters and alumina fibers, and FIGS. 10 and 11 show various volume ratios. Of aluminum alloys composited with silicon carbide whiskers and graphite particles and composite materials composed of aluminum alloys composited with various volume fractions of tungsten carbide particles and BN particles are compared with spheroidal graphite cast iron and chromium steel, respectively. Graphs showing the results of the wear test performed as a material, FIG. 12 and FIG. 13 are spheroidal graphite cast iron and chromium, respectively, for composite materials composed of aluminum alloys composited with graphite particles of various volume ratios and alumina fibers. Fig. 14 is a graph showing the results of an abrasion test conducted with steel as a counter material, and Fig. 14 shows alumina-silica fibers, silicon carbide particles and black. The results of the wear test conducted on the composite material composed of the aluminum alloy composited with the particles, and the composite material composed of the aluminum alloy composited with the alumina fibers, the potassium titanate whiskers and the BN particles were compared with the solid lubricant. It is a graph shown in contrast with the result of the abrasion test performed about the composite material as a comparative example not including. 1 …… Molded body, 1 ′ …… Composite material, 2a …… Reinforcing fiber, 2b ……
BN particles, 3 …… mold, 4 …… mold cavity, 5 …… molten metal, 6 …… plunger, 7 …… solidified body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Tanaka 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Corporation (56) References JP-A-53-102824 (JP, A)

Claims (6)

[Claims] 1. A reinforcing material having a volume fraction of 1 to 40% selected from the group consisting of short fibers, particles having a Mohs hardness of 6 or more and a diameter of 30 μm or less, and a mixture thereof, and a Mohs hardness of 4.5 or less. And a matrix metal was complexed by a substantially uniform mixture with a solid lubricant having a volume ratio of 3 to 50% selected from the group consisting of short fibers having a diameter of 100 μm or less, particles, and a mixture thereof. Metal matrix composite material. 2. The metal-based composite material according to claim 1, wherein the matrix metal is selected from the group consisting of aluminum, magnesium, copper, zinc, tin, and alloys containing any of these as a main component. A metal-based composite material, which is a formed metal. 3. The metal-based composite material according to claim 1 or 2, wherein the solid lubricant is any of oxides, sulfides, nitrides, graphite, and mixtures thereof. A metal-based composite material characterized by: 4. The metal-based composite material according to claim 1, wherein the reinforcing material has a diameter of 20 μm or less, and the solid lubricant has a Mohs hardness and a diameter, respectively. A metal-based composite material having a thickness of 4 or less and 50 μm or less. 5. The metal-based composite material according to any one of claims 1 to 3, wherein the Mohs hardness and the diameter of the reinforcing material are 7 or more and 20 μm or less, respectively, and the solid lubricant is used. Mohs hardness, diameter, volume ratio is 3 or less, 50
A metal-based composite material, which is 5 μm or less and 5 to 40%. 6. The metal-based composite material as claimed in claim 5, wherein the solid lubricant has a volume ratio of 10 to 40%.