JP3194073B2 - Friction material for synchronizer ring and method for manufacturing synchronizer ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a friction material for a synchronizer ring and a method for manufacturing a synchronizer ring.

[0002]

2. Description of the Related Art A synchronizer ring is used, for example, in a transmission of an automobile, at a joint portion for keeping two gears at a constant speed. An annular member that separates from the sliding partner. For this reason, the contact sliding part in the synchronizer ring is required to be excellent not only in mechanical strength and precision but also in frictional properties such as seizure resistance and wear resistance.

A conventional synchronizer ring is made of a Cu-based sintered alloy (Japanese Patent Application Laid-Open No. 1-225274).
No. 2) or a synchronizer ring whose main body part is made of a Cu-based or Fe-based alloy with a sprayed copper alloy film formed on its contact sliding surface (Japanese Patent Laid-Open No. 4-371560).
No.) are known.

[0004] However, in the former technique, although the sliding properties and abrasion resistance are improved as compared with the smelted ones because they are sintered bodies, there is still room for improvement in these friction properties. In addition, since the entire ring is a copper-based sintered body, there is a limit in mechanical strength, and there is also a problem that the strength is inferior to that of a melted synchronizer ring having a main body of an ordinary alloy. Even in the latter technique, the friction characteristics are not yet satisfactory, and the yield in forming a sprayed film is low, so that high manufacturing costs cannot be avoided.

[0005] On the other hand, it has been proposed to apply a metal sintered body to a sliding portion of a synchronizer ring. In this case, it is more preferable that the metal sintered body can be satisfactorily joined to the synchronizer ring main body.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a friction material for a synchronizer ring which is particularly excellent in frictional properties such as wear resistance and seizure resistance and which can be reliably and easily joined to a synchronizer ring body. The main purpose is to provide.

[0007]

The present inventor has conducted intensive studies in view of the above-mentioned problems of the prior art, and as a result, a sintered body having a specific composition and porosity has excellent friction characteristics and the like. Therefore, they have found that they are optimal as a friction material for a synchronizer ring and that they have excellent bonding properties with a synchronizer ring main body, and have completed the present invention.

That is, the present invention relates to the following friction material for a synchronizer ring and a method for manufacturing a synchronizer ring.

1. A metal sintered body, comprising: (1) at least one of Cu- (20 to 40% by weight) Zn alloy powder and a mixed powder of 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder; (2) FeMo, FeCr, FeW, FeTi, nitrided F
eTi, FeV, ZrO ₂ , stabilized zirconia, TiO
₂ , a total of 3 to 25% by weight of at least one of mullite and Si ₃ N ₄ and graphite, (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body or its sintering temperature Metals with lower melting points and / or
A friction material for a synchronizer ring having a porosity of 5 to 35% by volume, obtained by sintering a mixed powder comprising 2 to 15% by weight of an alloy.

[0010] 2. A method of manufacturing a synchronizer ring using a metal sintered body as a friction material, comprising: (1) Cu- (20 to 40% by weight) Zn alloy powder, 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder % Of at least one of the following mixed powders: (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, TiO ₂
, Mullite, at least one of Si ₃ N ₄ , and graphite in a total amount of 3 to 25% by weight. (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body, or Metals with a low melting point and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
A molded body separately formed as a friction material for a synchronizer ring so as to have a volume of 35% by volume was brought into contact with a sliding portion of the synchronizer ring main body, and then the synchronizer ring main body and the molded body were fixed to the above-mentioned solidified body. A method for producing a synchronizer ring, comprising sintering the molded body by heating to a phase line temperature or a melting point or higher and bonding a friction material to the synchronizer ring main body.

3. A method of manufacturing a synchronizer ring using a metal sintered body as a friction material, comprising: (1) Cu- (20 to 40% by weight) Zn alloy powder, 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder % Of at least one of the following mixed powders: (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, Ti
O _2, at least one and the total 3-25 wt% of graphite mullite and Si ₃ N _{4, (3)} has a solidus temperature lower than the sintering temperature of the metal sintered body or a sintered A metal having a melting point lower than the temperature and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
After molding as a friction material for the synchronizer ring on the sliding portion of the synchronizer ring main body so as to have a volume of 35% by volume, the synchronizer ring main body and the molded body are heated to the solidus temperature or the melting point or higher. By doing
A method for manufacturing a synchronizer ring, comprising sintering the molded body and bonding a friction material to the synchronizer ring main body.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail along with its embodiments.

The friction material for a synchronizer ring of the present invention comprises: (1) Cu- (20 to 40% by weight) Zn alloy powder and a mixed powder comprising 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder. at least one powder (first component) 60 to 95 wt%, (2) FeMo, FeCr , FeW, FeTi, nitride FeTi, FeV, ZrO _2, stabilized zirconia, Ti
The total (second component) of at least one of O ₂ , mullite and Si ₃ N ₄ and graphite (second component) is 3 to 25% by weight, and (3) having a solid solution wire at a temperature lower than the sintering temperature of the metal sintered body. Alternatively, a mixed powder composed of 2 to 15% by weight of a metal and / or alloy (third component) having a melting point lower than the sintering temperature is sintered.

The first component is, as described above, Cu- (2
0-40% by weight) Zn alloy powder and Cu powder 60-8
At least one kind of mixed powder composed of 0% by weight and 20 to 40% by weight of Zn powder is used. In the present invention, as long as it is within the range of the Cu amount and Zn amount alone and above,
And powders can be used in combination.

The proportion of the Zn component in the above alloy powder is as follows:
Usually about 20 to 40% by weight in the alloy powder, preferably 25%
To 35% by weight. In addition, Zn in the mixed powder
The ratio of the powder is usually about 20 to 40% by weight in the mixed powder,
Preferably, it is 25 to 35% by weight. In any of the alloy powder and the mixed powder, if the Zn content is too large,
The dezincing phenomenon at the time of sintering appears remarkably, causing a decrease in stability of various properties and a lack of strength. If the Zn content is too small, sulfur contained in gear oil used in the transmission, for example, causes sulfur corrosion of each member, which is not preferable.

The second component is composed of FeMo, FeCr,
FeW, FeTi, FeTi nitride, FeV, ZrO ₂ ,
The total (second component) of at least one of stabilized zirconia, TiO ₂ , mullite and Si ₃ N ₄ and graphite is used. In the present invention, the above components mainly serve as a hard material, and the above components mainly serve as a lubricant.

Further, among the above-mentioned second components, in particular, Fe
It is more preferred to use graphite and at least one of Ti, FeTi nitride, ZrO ₂ , and stabilized zirconia.

The stabilized zirconia as one of the second components is usually ZrO ₂ .CaO (3 to 7% Ca).
O), ZrO ₂ .MgO (3-7% MgO), ZrO _2.
Those having a composition such as Y ₂ O ₃ ( _{3 to} 15% Y ₂ O ₃ ) can be used. These are prepared, for example, by subjecting budderite or zircon sand to electrofusion and stabilization using a stabilizer such as CaO, MgO, or Y ₂ O ₃ .
Stabilized zirconia does not undergo transformation in its crystal structure up to about 1200 ° C., remains cubic, and has excellent heat resistance. Further, the thermal expansion coefficient has a property of being linear with respect to temperature. Among the above stabilized zirconia, ZrO ₂ .CaO (3 to 7% CaO) is particularly excellent in these characteristics.

As the third component, a metal and / or alloy having a solidus at a temperature lower than the sintering temperature of the metal sintered body or having a melting point lower than the sintering temperature is used. Having a solidus at a temperature lower than the sintering temperature of the metal sintered body means that a liquid phase is substantially generated at the temperature. By incorporating the third component, the third component melted at the interface between the synchronizer ring main body and the friction material during sintering wets the interface, interdiffusion occurs, and the joining to the main body is ensured. It will be easier. Therefore, in the present invention, the metal sintered body may have a solidus at a temperature lower than the sintering temperature, or may have a melting point lower than the sintering temperature. Also, as long as it has the above characteristics,
Any of metals and alloys may be used. Further, not only the metal and the alloy can be used together, but also two or more of them can be used together.

When such a third component is used, at least substantially any material can be used as long as the material of the synchronizer ring body is at least a known material. For example, Cu-Ni-Mo steel or the like can be used. Tensile strength is 588MPa
If the above-mentioned iron-based sintered material or the like is used as the material of the main body, the joining becomes more advantageous.

The above metals and / or alloys may be appropriately selected according to the sintering temperature of the material of the present invention. The P content is 5% by weight or more and 12% by weight or less, and the balance is substantially Cu.
Cu-P based alloy composed of not less than 15% by weight of Sn
Cu-Sn based alloy containing less than 00% by weight and the balance substantially consisting of Cu (that is, Cu-Sn based alloy containing Cu not exceeding 85% by weight), and the Zn content is 38% by weight.
It is preferable to use at least one of a Cu-Zn-based alloy containing at least 82% by weight and the balance substantially consisting of Cu and metal Sn. The alloy and metal S
n may contain impurities as long as the effect of the present invention is not adversely affected.

In particular, the melting point of the above-mentioned metal and / or alloy is usually about 10 to 300 than the sintering temperature,
It is more desirable to use one that is about 30 to 200 ° C. lower. By using such a third component, the joining becomes more advantageous.

Next, the composition ratios of the above four main components are shown below. The reason for limiting the composition ratio is as follows.
Since it depends on the interaction of the four components, it is shown as a rough guide.

The first component is usually 60 to 95 in the metal sintered body.
% By weight, preferably 65 to 90% by weight. 60
When the amount is less than% by weight, the amounts of the second component and the third component are relatively large, which is not preferable.

The content of the second component is usually about 3 to 25% by weight, preferably 5 to 22% by weight, in total. If the content exceeds 25% by weight, the strength becomes insufficient. If the content is less than 3% by weight, the wear resistance and the seizure resistance are deteriorated, and the desired friction coefficient cannot be obtained.

Regarding the above and the proportions of the components, the former is about 2 to 20% by weight in the metal sintered body from the viewpoint of the compatibility with the counterpart material, its own abrasion resistance and friction characteristics, and the latter is the seizure resistance. From the viewpoint of contribution to
Desirably, it is about 5% by weight.

The content of the third component is usually 2 to 15% by weight, preferably 4 to 12% by weight. If the content exceeds 15% by weight, the third component will be dissolved excessively,
It is not preferable because it causes a decrease in seizure resistance and a desired friction coefficient cannot be obtained. If the amount is less than 2% by weight, a predetermined bonding strength cannot be obtained, which is not preferable.

In the present invention, the first to third components are basically used. However, impurities (for example, Sn, Pb,
P etc.) may be included.

The friction material of the present invention generally has a porosity of about 5 to 35% by volume, preferably 10 to 30% by volume. These pores mainly have a role of retaining lubricating oil and the like, thereby contributing to an increase in dynamic friction coefficient and a decrease in static friction coefficient between the synchronizer ring and the mating member.
When the porosity exceeds 35% by volume, the mechanical strength is reduced. When the porosity is less than 5% by volume, the dynamic friction coefficient and the static friction coefficient cannot be reduced, which is not preferable.

The synchronizer ring body applicable to the synchronizer ring friction material of the present invention may be any known synchronizer ring body as well as its shape and material. Examples of the material include Cr steel, Cr-Ni steel, and Cr-Ni steel.
Iron-based alloys such as Mo steel, Cr-Mn steel, Cr-Ni-Mo steel, Cu-Zn-based, Cu-Sn-based, Cu-Si-based, Cu
Copper-based alloy -Al system such, other Cu-Ni-Mo steel system tensile strength of the like is an alloy of iron-based sintered materials with 588 N / mm ² or more.

The method of integrating the above-mentioned main body and the friction material of the present invention is not particularly limited, and for example, firing is performed in such a manner that a formed body of the friction material of the present invention before sintering is fitted on the inner diameter side of the previously prepared main body. After tying, or inserting a separately prepared main body into a mold, filling the inside of the main body with the raw material mixed powder of the friction material of the present invention, press-molding, and sintering to integrate with the main body. can do. Specifically, it is desirable to carry out by the following method.

1. (1) Cu- (20-40% by weight) Z
at least one of 60 to 95% by weight of a mixed powder composed of n-alloy powder and 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder; (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, TiO ₂
, Mullite, at least one of Si ₃ N ₄ , and graphite in a total amount of 3 to 25% by weight. (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body, or Metals with a low melting point and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
A molded body separately molded as a synchronizer ring friction material so as to have a volume of 35% by volume is brought into contact with a sliding portion of the synchronizer ring main body, and then the synchronizer ring main body and the molded body are fixed to the above-mentioned solidified body. By heating to a temperature not lower than the phase line temperature or melting point, the compact is sintered and a friction material is bonded to the synchronizer ring main body.

2. (1) Cu- (20-40% by weight) Z
at least one of 60 to 95% by weight of a mixed powder composed of n-alloy powder and 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder; (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO2, stabilized zirconia, TiO
2, a total of 3 to 25% by weight of at least one of mullite and Si3N4 and graphite, (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body or lower than the sintering temperature Metals with melting points and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
After molding as a friction material of the synchronizer ring on the sliding portion of the synchronizer ring main body so as to have a volume of 35% by volume, the synchronizer ring main body and the molded body are heated to the solidus temperature or the melting point or higher. By doing
The compact is sintered and a friction material is bonded to the synchronizer ring body.

According to the first method, the alloy powder is formed by a known molding method such as press molding so as to conform to the shape of the friction material in the synchronizer ring body to which the alloy powder is applied and to have the predetermined porosity. Mold separately according to the method. Then, after the compact (friction material for the synchronizer ring) is brought into contact with the sliding portion of the synchronizer ring main body, the synchronizer ring main body and the compact are both heated to the solidus temperature or the melting point or higher. This sinters the compact and bonds the compact to the synchronizer ring body as a friction material.
The molded body may be calcined before or after the contact.

According to the second method, the alloy powder is formed as a friction material on the sliding portion of the synchronizer ring main body. By heating both the synchronizer ring main body and the molded body to the solidus temperature or the melting point or more in this state, the molded body is sintered and the molded body is used as a friction material for the synchronizer ring main body. Join. It is also possible to perform calcination in the same manner as in 1 above.

In the above methods 1 and 2, the porosity after sintering can be set to a desired value by appropriately adjusting the average particle size of the mixed powder, the density of the compact, the sintering temperature, and the like. .

The above raw material mixed powder has an average particle diameter of usually 20.
It is desirable to use as a powder having a size of about 250 μm, particularly 40 to 200 μm. If the average particle size is less than 20 μm, the fluidity of the powder becomes poor, and it becomes impossible to fill the mold during molding. On the other hand, if the average particle size exceeds 250 μm, the particle size of the particles becomes large, and the filling of the powder into the thin portion becomes unstable, which is not preferable. The sintering temperature and atmosphere vary depending on the raw material powder used and the like.

[0038]

The friction material for a synchronizer ring according to the present invention is a sintered body having a specific composition and a constant porosity, so that it is excellent in wear resistance and seizure resistance and has stable friction. The coefficient can be exerted.

Further, since the above-mentioned friction material contains the third component, the joining (integration) with the synchronizer ring main body can be performed more reliably and easily. Further, it is more advantageous in terms of cost than the conventional thermal spray material.

The friction material of the present invention having such features is
Particularly, it can be suitably used for a contact sliding portion in a synchronizer ring.

[0041]

EXAMPLES Examples and comparative examples will be shown below to clarify features of the present invention.

Example 1 Each component was weighed and mixed so as to have the composition shown in Table 1 to obtain a mixed powder. The following components were specifically used.

Symbol Composition Average particle size (μm) Zn, Cu Cu-30% by weight Zn 50 Zn, Cu Cu-20% by weight Zn 50 Nitrided FeTi Low carbon FeTi No. 1 powder (JIS) Nitrided powder 120 FeTi Low carbon FeTi1 No. powder (JIS) 120 Stabilized ZrO2 Stabilized ZrO2 powder 100 ZrO2 ZrO2 powder 100 Graphite Phosphorus graphite powder 150 Cu-P alloy Cu-8 wt% P alloy powder 50 Cu-Sn alloy Cu-30 wt% Sn alloy powder 50 Cu-Zn alloy Cu-75 wt% Zn alloy powder 50 Sn Sn powder 50 Al2O3 Al2O3 powder 100 SiO2 SiO2 100

[0044]

[Table 1] Next, each mixed powder was filled in a mold, and the density thereof was adjusted by a molding press so as to have a desired porosity after sintering. Then, a molded body of 30 mm × 30 mm × 5 mm was formed. Sintering was performed at 850 ° C. for 1 hour in a gas atmosphere to prepare a sample piece. Tests were performed on the obtained sample pieces by the following method. Table 2 shows the results.

[0045]

[0046]

[Table 2] As shown in Table 2, Examples 1 to 6 exhibited superior properties in all of seizure resistance, wear resistance and friction coefficient as compared with the high-strength yellow steel material used as a conventional synchronizer ring material. It shows that it shows.

In Comparative Examples 1 and 2, the third component is outside the scope of the present invention. If the third component is completely absent or too small (Comparative Example 1), it cannot be joined to the main body, although the frictional sliding properties are satisfactory (see below). When the amount of the third component is too large (Comparative Example 2), it can be seen that the seizure resistance is insufficient and the friction coefficient is low.

It can be seen from Comparative Example 3 that since the amount of Zn is too small, sulfidation corrosion occurs.

In Comparative Example 4, since the hard component and the lubricant as the second components were not added, the abrasion resistance was insufficient and the coefficient of friction was low.

In Comparative Examples 5 and 6, the type of the hard material as the second component is different from that of the present invention. When SiO2, Al2O3, or the like is used as the hard material, the friction material itself has poor wearability with the mating steel material, low seizure resistance, high mating aggressiveness, and increased wear of the friction material itself due to surface roughness of the mating material.

In Comparative Examples 7 and 8, the addition amounts of the hard material and the lubricant, which are the second components, are out of the range of the present invention. When the amount of these additives is large (Comparative Example 7), the abrasion resistance and the coefficient of friction exhibit excellent characteristics, but the seizure resistance is insufficient and the opponent aggressiveness is high. On the other hand, when the addition amount is small (Comparative Example 8), it can be seen that the seizure resistance is excellent, but the wear resistance and the friction coefficient are low.

In Comparative Examples 9 and 10, the porosity of the friction material was out of the range of the present invention. If the porosity is small (Comparative Example 9), the seizure resistance is insufficient and the coefficient of friction is low. When the porosity is large (Comparative Example 10), the seizure resistance is good, but the wear resistance and the strength of the friction material itself are low.

Test Example 1 The jointability with the synchronizer ring body was examined.

Pre-fabricated Fe-4% by weight Ni-1.
An iron-based sintered body having a composition of 5 wt% Cu-0.5 wt% Mo-0.5 wt% C (graphite) and a density of 7.0 g / cm <3>
It was cut into 0 mm × 10 mm × 10 mm, and this was used as a synchronizer ring main body.

Further, the respective components were weighed so as to obtain the compounding composition shown in Table 3, and mixed to obtain a mixed powder. Then 1
The above main body was inserted into a mold of 0 mm × 10 mm, each mixed powder was filled in the mold, and the density was adjusted by a molding press so that the porosity was 25% by volume after sintering. A molded body having a thickness of 5 mm was produced thereon. Then, this was sintered for about 1 hour in a nitrogen gas atmosphere to obtain a sample. The joined sample was sheared at the joint surface in a direction parallel to the joint surface, and the joint strength was measured. Table 4 shows the results.

[0056]

[Table 3]

[0057]

[Table 4] Examples 7 to 16 are based on the composition of Example 1 having a porosity of 25% by volume, with the third component and the amount added being varied. As shown in Table 4, it can be seen that these have excellent bonding strength.

On the other hand, in Comparative Examples 13 to 16, the third component was smaller than the range of the present invention, and the one not containing the third component could not be bonded at all, and the one having less third component had poor bonding strength. It turns out that it is enough. Comparative Examples 17 to
In No. 18, the sintering temperature of the friction material was just below the temperature at which the liquid phase of the third component appeared, and it can be seen that sufficient joining strength was not obtained.

Test Example 2 The relationship between various characteristics of the sintered body and the porosity was examined.

In the composition of Example 1, the porosity after sintering was set to 3 (Comparative Example 9), 5, 15, 25 (Example 1), 35 and 40 (Comparative Example 10) by volume. To prepare a sample. The seizure load, kinetic friction coefficient (final value), wear amount, and shear strength of each of the prepared samples were measured, and the relationship with the porosity was examined. The results are shown in FIGS.

From the results shown in FIGS. 1 to 4, it is understood that the friction material of the present invention having a predetermined porosity is excellent in these characteristics.

Test Example 3 The effect of the amount of the third component added was examined.

In the same manner as in Test Example 1 except that the amount of the third component added was 0 (Comparative Example 13), 1.5, 2, 5
(Comparative Example 14), 8 (Example 7), 12, 15, and 18
A sample for measuring the bonding strength with the synchronizer ring main body was prepared so as to have a weight%, and the bonding strength was determined. The result is shown in FIG.

From the results shown in FIG. 5, it can be seen that the friction material of the present invention has excellent bonding strength with the synchronizer ring main body.

[Brief description of the drawings]

FIG. 1 is a graph showing the relationship between seizure load and porosity in Test Example 2.

FIG. 2 is a graph showing a relationship between a dynamic friction coefficient and a porosity in Test Example 2.

FIG. 3 is a graph showing the relationship between the amount of friction and the porosity in Test Example 2.

FIG. 4 is a graph showing the relationship between shear strength and porosity in Test Example 2.

FIG. 5 is a graph showing the relationship between the bonding strength and the amount of the third component added in Test Example 3.

FIG. 6 is a view showing a metal structure of a cross section of a joint interface of a sintered body in Example 1.

FIG. 7 is a view showing a metal structure of a cross section of the friction material in Example 1.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Fuwa 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Kenji Ueno 1 Toyota Town Toyota City, Aichi Prefecture Toyota Motor Corporation ( 58) Field surveyed (Int.Cl. ⁷ , DB name) C22C 1/05 B22F 5/00

Claims (5)

(57) [Claims] 1. A sintered metal body comprising: (1) at least one of a Cu- (20 to 40% by weight) Zn alloy powder and a mixed powder comprising 60 to 80% by weight of Cu powder and 20 to 40% by weight of Zn powder; 60 to 95% by weight of one type, (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, TiO
₂ , a total of 3 to 25% by weight of at least one of mullite and Si ₃ N ₄ and graphite, (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body or its sintering temperature Metals with lower melting points and / or
A friction material for a synchronizer ring having a porosity of 5 to 35% by volume, obtained by sintering a mixed powder comprising 2 to 15% by weight of an alloy. 2. The synchronizer ring according to claim 1, wherein the component (2) is (2) a total of 3 to 25% by weight of at least one of FeTi, FeTi nitride, ZrO ₂ and stabilized zirconia and graphite. Friction material. 3. A Cu--P alloy comprising: (3) a P content of not less than 5% by weight and not more than 12% by weight and the balance substantially consisting of Cu; Not less than 100% by weight,
Cu-Sn based alloy whose balance is substantially made of Cu The Zn content is at least 38% by weight to 82% by weight, and the balance is at least one of a Cu-Zn based alloy substantially made of Cu and metal Sn. The friction material for a synchronizer ring according to claim 1. 4. A method of manufacturing a synchronizer ring using a metal sintered body as a friction material, comprising: (1) a Cu- (20 to 40% by weight) Zn alloy powder and 60 to 80% by weight of a Cu powder; At least one of 60 to 95% by weight of a mixed powder consisting of 20 to 40% by weight of powder; (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, TiO ₂
, Mullite, at least one of Si ₃ N ₄ , and graphite in a total amount of 3 to 25% by weight. (3) having a solidus at a temperature lower than the sintering temperature of the metal sintered body, or Metals with a low melting point and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
A molded body separately formed as a friction material for a synchronizer ring so as to have a volume of 35% by volume was brought into contact with a sliding portion of the synchronizer ring main body, and then the synchronizer ring main body and the molded body were fixed to the above-mentioned solidified body. A method for producing a synchronizer ring, comprising sintering the molded body by heating to a phase line temperature or a melting point or higher and bonding a friction material to the synchronizer ring main body. 5. A method for manufacturing a synchronizer ring using a metal sintered body as a friction material, comprising: (1) a Cu- (20 to 40% by weight) Zn alloy powder and 60 to 80% by weight of a Cu powder; At least one of 60 to 95% by weight of a mixed powder consisting of 20 to 40% by weight of powder; (2) FeMo, FeCr, FeW, FeTi, F nitride
eTi, FeV, ZrO ₂ , stabilized zirconia, Ti
O _2, at least one and the total 3-25 wt% of graphite mullite and Si ₃ N _{4, (3)} has a solidus temperature lower than the sintering temperature of the metal sintered body or a sintered A metal having a melting point lower than the temperature and / or
Alternatively, a mixed powder of 2 to 15% by weight of an alloy is used, and the porosity after sintering is 5 to 5.
After molding as a friction material for the synchronizer ring on the sliding portion of the synchronizer ring main body so as to have a volume of 35% by volume, the synchronizer ring main body and the molded body are heated to the solidus temperature or the melting point or higher. By doing
A method for manufacturing a synchronizer ring, comprising sintering the molded body and bonding a friction material to the synchronizer ring main body.