JPH0813073A - Aluminum-based sliding member - Google Patents

Abstract

PURPOSE:To provide an Al-based sliding member improved in the holdability of hard particles, capable of suppressing or avoiding the falling of the hard particles and advantageous to the suppression or avoidance of abrasive wear caused by the falling. CONSTITUTION:A powdery mixture contg. dendritic electrolytic Cu powder 3 (-100 mesh) holding hard particles 2 of AIN (4.3mum particle diameter), etc., and Al powder 1 (-100 mesh) is hot-pressed at 350 deg.C under 310MPa pressure to obtain a sintered alloy. The amt. of AIN is 3vol.% and that of electrolytic Cu powder is 10vol.%.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an aluminum-based sliding member containing hard particles for improving sliding characteristics.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Examined Patent Publication No. 61-17895, an Al base, MoS ₂ , WS ₂ and Cu ₂ S as solid lubricating components, and Si as hard particles,
There is known an aluminum-based sliding member made of an oxide of Al or Zr, a carbide, a nitride, or a sintered alloy in which a solid solution thereof is dispersed. In this product, raw material powders are mixed by a V-type mixer to form a mixed powder, and the mixed powder is compression molded at a molding pressure of 3 to 6 ton / cm ² to form a green compact. It is manufactured by sintering a green compact in a temperature range of 500 to 650 ° C to obtain a sintered alloy. This product is intended to improve self-lubricating property, seizure resistance, conformability and wear resistance by containing a solid lubricating component and hard particles.

[0003]

The aluminum-based sliding member as described above forms a sintered alloy by using a mixed powder obtained by mixing each raw material powder with a V-type mixer, and constitutes a base. Hard particles and solid lubricating components are arranged at the grain boundaries of the base particles. The hard particles arranged at the grain boundaries easily fall off during sliding. In particular, when the hard particles are fine, the hard particles tend to be locally unevenly distributed in the grain boundaries of the base particles, and when the hard particles are locally unevenly distributed, the hard particles are more likely to fall off. If the hard particles fall off, it is easy to induce abrasive wear on the sliding surface.

The present invention has been made in view of the above circumstances, and an object thereof is to improve the holdability of hard particles by adopting Cu powder particles such as electrolytic Cu powder particles holding hard particles. An object of the present invention is to provide an aluminum-based sliding member that can reduce or avoid falling of hard particles during movement, and that is advantageous for reducing or avoiding abrasive wear due to falling of hard particles.

[0005]

An aluminum-based sliding member according to claim 1 is composed of an alloy obtained by compressing and sintering powder containing aluminum-based powder particles and Cu powder particles in an aggregated form,
The Cu powder particles are characterized by being dispersed in the grain boundaries of the base material particles made of aluminum-based powder particles while holding the hard particles. The powder may be subjected to the compression treatment and the sintering treatment at the same time to form the sintered alloy, or the powder may be subjected to the compression treatment and then the sintering treatment to form the sintered alloy.

[0006]

The aluminum-based sliding member of the present invention can be constituted by compressing and sintering powder containing aluminum-based powder particles and agglomerated Cu powder. In this case, the powder is formed by simultaneously performing heating and compression by hot pressing, or after forming the green compact by compression molding the powder, the green compact is heated and sintered. You may form by doing.

The aluminum-based powder particles constituting the base particles are
Aluminum has other elements (eg Si, Fe, Ni, Mg, C).
It is also meant to include aluminum alloy powder particles alloyed with at least one of u, Zn, and Mn). The average particle size of the aluminum-based powder particles can be appropriately selected according to the type of the aluminum-based sliding member, but the particle size can be 10 to 200 μm, 20 to 100 μm, and particularly 30 to 40 μm.

As a typical agglomerated form of Cu powder, electrolytic Cu powder can be adopted. Here, the agglomerated form means an agglomerated form in the original shape of the particles before compression molding and before sintering, and includes dendritic form and sponge form. The Cu powder in the agglomerated form has a large number of fine irregularities in the powder state and has a considerably large surface area as compared with the spherical Cu powder particles formed by the atomizing treatment.

The Cu powder having such an aggregated form is plastically deformed and crushed in the green compact after compression molding and the sintered alloy after sintering. However, when observing the sintered alloy with a microscope,
When the Cu powder in the agglomerate form is used, the interface between the base material particles composed of aluminum-based powder particles and the Cu powder particles has a large degree of unevenness, and therefore the spherical or pseudo-spherical surface formed by the atomizing treatment is used. The interface between the Cu powder particles and the substrate is different. Therefore, it is understood that the Cu powder in the agglomerated form was used.

The above-mentioned electrolytic Cu powder is generally electrolyzed from a copper sulfate solution to form Cu in the form of powder on the cathode. If necessary, dehydration treatment, reduction treatment with a reducing gas, and pulverization treatment may be added. Is also good. Such electrolytic Cu powder particles are generally dendritic. The average particle size and apparent density of the electrolytic Cu powder particles can be appropriately selected according to the type of the aluminum-based sliding member, but the particle size is 10 to 150 μm, and particularly 20 to 80 μm.
The apparent density is, for example, 2.3 to 3.8 cc / g.
You can

As the agglomerated Cu powder, a reduced Cu powder may be used depending on the case. The reduced Cu powder is generally spongy. C in the aggregated form described above
Hard particles are held in the u powder. The hard particles are effective for ensuring wear resistance on the sliding surface of the aluminum-based sliding member. In order to hold the hard particles in the agglomerated Cu powder particles, if the agglomerated Cu powder and the hard particle powder are mixed and treated at a stage before compression of the powder,
Since the hard particles enter inside the aggregated Cu powder,
A sintered alloy may be formed using such mixed powder.
For the mixing process, for example, a V-type mixer or a ball mill can be adopted.

Hard particles having hardness exceeding Hv200 can be generally adopted. Hard particles is generally nitrides, carbides, oxides, borides, available hard metal or the like, can be adopted for example _{AlN, SiC, Al 2 0 3} , FeB like. The average particle diameter of the hard particles can be appropriately selected according to the type of aluminum-based sliding member, but the average particle diameter is 1 to 3
It can be 0 μm, especially 2 to 20 μm. If the particle size of the hard particles is too small, it is disadvantageous in ensuring the slidability and wear resistance.
The hard particles may be in the form of particles, needles, rods, or the like.

In the aluminum-based sliding member of the present invention, P may be used as another soft material between the base particles or in the base particles depending on the case.
b or Cu-Pb alloy (especially 30 wt% Pb
%) Can also be arranged. These are those that function as a solid lubricating component on the sliding surface of the aluminum-based sliding member, and those having a large degree of thin spreading during sliding are preferable, and graphite, molybdenum disulfide, bismuth, resin (particularly PTFE) A heat resistant resin such as a fluorine resin or an aromatic polyester) can be adopted. The average particle size of these soft materials can be appropriately selected according to the type of aluminum-based sliding member, but the average particle size is 10 to 100 μm, especially 2
It can be 5 to 50 μm.

In the aluminum-based sliding member of the present invention, the Cu powder particles are sintered while holding the hard particles, and the holding property of the hard particles by the Cu powder particles functioning as a soft material is enhanced, so that sliding is achieved. At this time, the hard particles are less likely to fall off.

[0015]

【Example】

(Basic Mode) The basic mode of the embodiment of the present invention is shown in FIG. In this mode, as shown in FIG. 1, base particles 1 made of aluminum alloy powder particles as aluminum-based powder particles are formed, and electrolytic Cu powder particles 3 are dispersed in the grain boundaries of the base particles 1. The electrolytic Cu powder particles 3 are characterized in that the hard particles 2 are held in an embedded state.

Here, the relationship of hardness is (hard particle 2> base material particle 1> electrolytic Cu powder particle 3), and electrolytic Cu powder particle 3 is the softest. As the hard particles 2, carbides (SiC, TiC, VC, Fe ₃ C, NbC et
c), nitrides (AlN, BN, Si ₃ N ₄ , TiN, Z
rN), oxides (Al ₂ O ₃ , MgO, ZrO ₂ , Si
O ₂ etc), boride (FeB, Fe ₂ B, AlB ₁₂ ,
AlB ₂ etc), iron such as Fe ₃ P and Fe ₂ P.
Amity compound, B simple substance, iron powder (alloy steel powder, mold steel powder (SKH-
9) and diffusion alloy powder).

The average particle size of the hard particles 2 is set to 2 to 20 μm in consideration of ensuring wear resistance. Desirably 2-15μ
m is good. If the particle size is less than 2 μm, the wear resistance of the sliding surface is inferior, and if it exceeds 20 μm, hard particles are likely to fall off during sliding, causing abrasive wear, and further self-wear is severe, resulting in an opponent attack. It also becomes more likely. This aluminum-based sliding member was manufactured as follows. First, Al powder, electrolytic Cu powder and hard particles were weighed in a predetermined mixing ratio and then mixed for a predetermined time with a V-type mixer to obtain a mixed powder. As a result, the hard particles enter the inside of the electrolytic Cu powder particles and are held therein. Here, since the electrolytic Cu powder particles are dendritic in the powder state before compression as described above, and the electrolytic Cu powder particles are relatively soft, the hard particles easily enter the inside of the electrolytic Cu powder particles. . This mixed powder was hot pressed with a molding die to obtain a sintered alloy.

According to this aluminum-based sliding member, the wear resistance of the sliding surface is improved by the action of the hard particles 2. Moreover, since the electrolytic Cu powder particles 3 are sintered in a state of enclosing and holding the hard particles 2, the holdability of the hard particles 2 is high.
In particular, the electrolytic Cu powder particles 3 are relatively soft, and while the hard particles 2 are wrapped and held, they are plastically deformed and crushed by the compressive force during hot pressing. It is easy to ensure good adhesion with 2.
Therefore, the holdability of the hard particles 2 is high.

Therefore, with this aluminum-based sliding member, the hard particles 2 are less likely to fall off during sliding. Therefore, it is possible to reduce or avoid the abrasive wear caused by the falling off of the hard particles 2, which is advantageous in improving the wear resistance. (Compounding ratio of Examples) The amount of the hard particles 2 and the amount of the electrolytic Cu powder particles 3 are not particularly specified, but the entire mixed powder to be an aluminum-based sliding member (including aluminum alloy powder, electrolytic Cu powder and hard particles) Is 100% by Vol%, the hard particles are preferably about 1 to 17 Vol%, particularly 2 to 15 Vol%.
% Is preferable. Electrolytic Cu powder particles are 1 to 48 Vol
Can be%. However, (hard particles + electrolytic Cu powder particles) ≦
It is preferably 50 Vol% or less. 1 hard particle
If it is less than 0.1%, the hard particles are few and the effect of improving wear resistance is small, and if the hard particles are more than 17%, cracks and the like are likely to occur during machining, which is not practical. If the amount of electrolytic Cu powder particles is small, the proportion of hard particles held in the electrolytic Cu powder particles may decrease.
Electrolytic Cu powder particles have a particle size of 10 to 150 μm before compression.
m, especially about 10 to 50 μm is preferably used.

(Test Example) A test example in the above embodiment will be described. The conditions of each test example are shown in Tables 1 and 2. Table 1 shows the components and particle size of the aluminum alloy powder (atomized powder) constituting the base material composition, the type of hard particles, the particle size (μm) of the hard particles, and the amount (Vol%) of the hard particles. Table 2 shows the type of soft material such as electrolytic Cu powder, the particle size and amount (Vol%) of the soft material, and the manufacturing method (the form of powder treatment and hot pressing temperature).

[0021]

[Table 1]

[0022]

[Table 2]

In Test Example 1, as shown in Table 1, the composition of the aluminum alloy powder particles was Al-3% Ni-3% Si-3% Cu.
And the particle size is -100 mesh. The hard particles are AlN (particle size 4.3 μm), and the amount is 3 Vol.
%. Further, as shown in Table 2, the particle size of the electrolytic Cu powder is −
100 mesh, the amount is 10 Vol%. Note that V
The ol% is defined as 100 Vol% of the entire mixed powder.

In Test Example 1, the aluminum alloy powder, the AlN powder and the electrolytic Cu powder were mixed in the V-type mixer for 1 hour in the mixing step to obtain a mixed powder. Next, a hot pressing process was performed. That is, the mixed powder is charged into a cavity of a molding die, deaerated in a vacuum state of 10 ⁻³ Torr, and then pressed while being heated, that is, hot pressed,
Thereby, the mixed powder was sintered to form a sintered alloy (see Table 2). As shown in Table 2, the hot press temperature is basically 350 ° C, and the molding pressure is basically 310 MPa.

Also in Test Examples 2 to 7, according to the conditions shown in Tables 1 and 2, similarly to Test Example 1, a sintered alloy was formed through a mixing step and a hot pressing step. In addition, since Test Example 8 and Test Example 9 did not include hard particles, they were not directly included in the object of the present invention, but contained electrolytic Cu powder, and thus were described in the meaning of Reference Example. In Test Example 10, electrolytic Cu powder and AlN powder were first mixed with a V-type mixer to obtain 1
A secondary mixed powder is formed, and then the primary mixed powder, Pb powder (atomized powder), and aluminum alloy powder are secondarily mixed by a V-type mixer to form a secondary mixed powder. The secondary mixed powder is charged into the cavity of the molding die, and 10 ⁻³ Tor is applied.
After degassing in a vacuum state of r, press while heating, that is, hot press (hot press temperature is 350 ° C.,
The molding pressure was 310 MPa), whereby a sintered alloy was formed. In Test Example 10 as described above, electrolytic C is applied in the state of no aluminum alloy powder or Pb powder in the primary mixing stage.
Since the u powder and the AlN powder are mixed, AlN particles can efficiently enter the inside of the electrolytic Cu powder particles.
It is advantageous to improve the holdability of the.

In Test Example 11, Al powder, electrolytic Cu powder and Pb powder (atomized powder) were primarily mixed by a V-type mixer to form a primary mixed powder, and then the primary mixed powder and AlN were mixed. The powder and the powder are secondarily mixed with each other by a V-type mixer to form a second mixed powder, and then the second mixed powder is charged into a cavity of a molding die, and a vacuum state of 10 ⁻³ Torr is applied to hot press ( Hot press temperature is 350 ° C, molding pressure is 31
0 MPa), thereby forming a sintered alloy.

As described above, in Test Examples 10 and 11 of the present invention, Pb powder is also mixed with the mixed powder. It is considered that this Pb powder is arranged at the grain boundaries of the base particles in the sintered alloy. Since the melting point of Pb is low, it is considered that Pb melts at the hot pressing temperature (350 ° C). The molten Pb flows due to the compression during hot pressing and easily adheres to the electrolytic Cu powder particles in the vicinity of Pb. As described above, the electrolytic Cu powder particles have an aggregated form (dendritic form) and have a large number of fine irregularities on the surface. Is effective for decentralization of. As described above, since it is advantageous for making Pb functioning as a solid lubricating component finer and more dispersed, it is advantageous for improving the slidability of the aluminum-based sliding member.

As shown in Table 1, Comparative Example 1 has a weight ratio of Al
This is a casting alloy in which a molten metal having a composition of -13% Sn-3% Si-1% Cu-0.4% Cr is solidified by casting. Also in Comparative Examples 2 to 4, predetermined mixed powders prepared according to the conditions shown in Table 1 and Table 2 were hot pressed to obtain sintered alloys. Here, in Comparative Example 2, Pb powder (atomized powder, −4) of Pb simple substance was used instead of the electrolytic Cu powder.
00 mesh) and Al alloy powder (atomized powder, -1)
00 mesh) and AlN powder (4.3 μm) were mixed by a V-type mixer, and the mixed powder was hot-pressed to form. In Comparative Example 2 as described above, electrolytic Cu
No powder particles were used, and therefore A is a hard particle.
1N is not retained in the electrolytic Cu powder particles.
That is, as shown schematically in FIG. 2, the hard particles 2 made of AlN
Is simply arranged at the grain boundary of the base material particle 1,
It is presumed that the holding property is not sufficient and the falling property is high during sliding.

In Comparative Example 3, Pb powder containing Pb alone (atomized, -400 mesh) was used in place of the electrolytic Cu powder, and the Pb powder and Al alloy powder (-100 mesh) were mixed in a V-type mixer. The mixed powder thus mixed is hot pressed to form a sintered alloy and does not contain AlN. Further, Comparative Example 4 is formed by hot pressing a mixed powder obtained by mixing an Al alloy powder and an AlN powder with a V-type mixer without using electrolytic Cu powder. In Comparative Example 4 as described above, AlN is not held by the electrolytic Cu powder particles, but the hard particles 2 made of AlN are simply arranged at the grain boundaries of the base particles, as schematically shown in FIG. Therefore, it is presumed that the sliding property is high during sliding.

A wear resistance test and a seizure resistance test were carried out for each of the above-mentioned test examples and comparative examples. The test conditions will be described later. In the wear resistance test, the block specific wear amount indicating the wear of the test piece itself and the shaft wear indicating the wear of the mating material were measured. In the seizure resistance test, seizure resistance surface pressure was measured. FIG. 3 shows the test results. Comparing the test results, in Comparative Example 4 in which the electrolytic Cu powder holding AlN is not used, as can be understood from FIG. 3, both the block specific wear amount and the shaft wear amount are large. However, Test Examples 1 to 7 corresponding to the present invention,
In Test Example 10 and Test Example 11, as can be understood from FIG.
It can be seen that both the block specific wear amount and the shaft wear amount are small, and therefore the self wear resistance is good and the opponent attacking property is also small. It is presumed that this is because the holdability of the hard particles is improved and the hard particles are less likely to fall off.

Further, the seizure-resistant surface pressure in Comparative Examples 1 to 3 is at most 5 MPa, which is quite small, and is easily seized. However, Test Example 10 corresponding to the present invention
The surface pressure of seizure resistance is over 20 MPa, and seizure is difficult. The reason is that firstly, as in Test Examples 1 to 9, the holding property of AlN by the electrolytic Cu powder particles is high, and secondly, in Test Example 10, the AlN powder is primarily mixed with the electrolytic Cu powder. Therefore, it is presumed that a large proportion of AlN is held by the electrolytic Cu powder particles.

The seizure-resistant surface pressure of Test Example 11 is 17 MP.
It can be seen that the size exceeds a and the seizure resistance is also excellent. It is also presumed that this is because the holdability of the hard particles is improved and the hard particles are less likely to fall off. Test method The test apparatus used in the wear resistance test method is shown in FIG. This test device is called a cylindrical / flat plate type wear test device, and is a bar 20 held by a holding shaft 201 so as to be swingable.
2, a holder portion 203 provided on the bar 202, a weight 204 for applying a load to the bar 202, and the nozzle hole 20.
5 and a shaft 206 as a rotatable mating member. Then, with the block W1 as the test piece held in the holder portion 203 of the bar 202, the block W1 is pressed against the shaft 206 by the weight 204 and the shaft 206 is rotated in the arrow X1 direction. Slide it. The size of the block W1 is 5 mm x 1
It is 0 mm × 15 mm. And the shaft 206 which is the other material
And the block specific wear amount (mm ³ / kg · mm) of the test piece were measured. The block specific wear amount means {wear volume of block W1 / (sliding distance × test load)}.

The test conditions are as follows. Speed: 0.5m / s (240rpm) Load: 196N (20kgf) Lubricating oil type: Paraffin base oil (Cristol 5
2) Mist lubrication 5 μg / s Lubricating oil temperature: Room temperature Time: 2 Hr Block W1 dimensions: Sliding width 10 mm Block W1 surface roughness: 1.0 to 2.0 μm Rz Shaft 206 material: S55C (quenched), Hv500 Axis 206 dimensions: diameter 40. Length 30 mm Surface roughness of shaft 206: 1.0 to 1.2 μm Rz Next, FIG. 5 shows a test apparatus used in the above-described seizure resistance test method. This test is also called a 3-pin / disk type thrust test. In this test, the test piece W2 is mounted on the rotatable holder 300 of the thrust tester, and the three mating members 302 (material: SUJ2, diameter 8) are attached to the solid base 301.
mm) in a protruding state, the holder 300 is rotated at a predetermined speed in the direction of arrow X2 while supplying the oil mist 304 from the oiling hole 303 of the solid base 301, whereby the mating member 302 of the solid base 301 is rotated. (Material: SUJ
2) and the test piece W2 were slid. The test piece W2 has a flat plate shape and has a size of 40 mm × 40 mm and a thickness of 5 mm. The test piece W2 is obtained by machining both end surfaces in the axial direction of a disc-shaped sintered alloy formed according to each test example to have the above-described thickness. The test conditions are as follows. Testing machine: High speed and high load thrust tester Speed: 1 m / s Loading method: 0.3 kN / 15 min (gradual increase) Oil type: Paraffin base oil (Cristol 5
2) Spray amount: 10 μg / s Counterpart material 302: SUJ2, surface roughness 0.8 μm Rz Contact area: 0.71 cm ² (Supplementary note) The following technical idea can be understood from the description of the above-mentioned examples. A mixing step of forming a mixed powder by mixing Cu powder in an aggregated form such as electrolytic Cu powder, aluminum alloy powder, and hard particle powder; and performing the compression treatment and the heat treatment on the mixed powder simultaneously or in sequence, The method for producing an aluminum-based sliding member according to claim 1, wherein the mixed powder is sintered into a sintered alloy. A mixing step of mixing agglomerated Cu powder such as electrolytic Cu powder and hard particle powder to form a primary mixed powder, and mixing the primary mixed powder and aluminum alloy powder to form a secondary mixed powder. The aluminum-based sliding member according to claim 1 is manufactured by subjecting the secondary mixed powder to compression treatment and heat treatment, and sintering the mixed powder into a sintered alloy. how to. According to this method, since the Cu powder particles and the hard particles can be mixed in a minimum amount in the primary mixing stage, the advantage that the hard particles can efficiently enter the inside of the aggregated Cu powder particles can be obtained. The mixed powder contains Pb, and the sintering temperature is 330 to 400 °.
The method according to or being C. According to this method
Since the sintering temperature is relatively low, there is an effect that Pb can be melted and adhered to the Cu powder particles without causing melting of the Cu powder particles, and the Pb functioning as a solid lubricating component can be finely dispersed. Can be expected.

[0034]

According to the aluminum-based sliding member of the present invention, since the hard particles are held in the Cu powder particles dispersed in the grain boundaries of the base particles, the holding property of the hard particles can be improved, It is possible to reduce or avoid dropping of hard particles. Therefore,
It is advantageous for reducing or avoiding the abrasive wear caused by the falling of the hard particles, and the wear resistance of the aluminum-based sliding member can be further improved.

When the hard particles are fine, the fine hard particles are likely to aggregate, so that they tend to be unevenly distributed in the sintered alloy. In this respect, according to the aluminum-based sliding member of the present invention,
Since the hard particles are held in the Cu powder particles dispersed in the grain boundaries of the base particles, even when the hard particles are fine, the aggregation and uneven distribution of the hard particles can be reduced as much as possible, and the dispersibility of the hard particles is improved. The effect that can be made can be expected.

The aluminum-based sliding member of the present invention can be used in, for example, vehicle parts, specifically, automobile engines, transmissions, bearing parts, compressor parts and the like, and can improve the life thereof. Since seizure resistance is improved, various bushes, washers, and
The seizure trouble of metal can be significantly reduced. Further, even if the surface pressure during sliding is high, seizure is unlikely to occur, which can contribute to the reduction in size and weight of the mechanical structure.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a metallographic structure showing each form of an example.

FIG. 2 is a schematic diagram of a metallographic structure showing a morphology of a comparative example.

FIG. 3 is a graph of test results showing an abrasion resistance test and seizure resistance.

FIG. 4 is a configuration diagram of an abrasion resistance test apparatus.

FIG. 5 is a configuration diagram of a main part of a seizure resistance test apparatus.

[Explanation of symbols]

Reference numeral 1 is a base particle, 2 is a hard particle, and 3 is a Cu powder particle.

Front Page Continuation (72) Inventor Imahashi ▲ Kuni ▼ hiko 1 Toyota-cho, Toyota-shi, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Hirohisa Miura 1-cho, Toyota-cho, Aichi prefecture Toyota-automobile Co., Ltd. ( 72) Inventor Yasuhiro Yamada 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Kiyo Kumada 3-65 Midorigaoka, Toyota City, Aichi Prefecture Daitoyo Kogyo Co., Ltd. (72) Inventor Souji Kamiya 3-6, Midorigaoka, Toyota-shi, Aichi Otoyo Kogyo Co., Ltd. (72) Inventor Toshihiko Kira 3-65, Midorigaoka, Toyota-shi, Aichi Otoyo Kogyo Co., Ltd. (72) Inventor Jun Kusunoki Kutaro-cho, Chuo-ku, Osaka 3-6-8 Toyo Aluminum Co., Ltd. (72) Inventor Kohei Kubo, Kyutaro-cho, Chuo-ku, Osaka City 3-68-8 Toyo Aluminum Co., Ltd. (72) Kazuo Fujii, Kutaro-cho, Chuo-ku, Osaka City 3-6-8 Toyo Aluminum Co., Ltd. Inside the company

Claims (1)

[Claims] 1. An alloy obtained by compressing and sintering a powder containing aluminum-based powder particles and Cu powder particles in the form of agglomerates, wherein the Cu powder particles retain the hard particles. An aluminum-based sliding member, characterized in that it is dispersed in the grain boundaries of the base material particles constituted by.