JPH05331504A - Frictional sliding member - Google Patents

Abstract

PURPOSE:To provide a frictional sliding member excellent in wear resistance even under severe conditions, weak in counterpart attackability, difficult to seize and with the friction coefficient stabilized over a long period. CONSTITUTION:This member consists of a parent phase consisting of 70-20wt.% of an Al-Si alloy powder contg. 10-20wt.% Si and the balance Al and 30-80wt.% Mo powder and sintered at 10-20% porosity and a soft alloy impregnated with the parent phase and consisting of 2-20wt.% Sn, at least one kind between 0.05-15wt.% In and 0.01-5wt.% Cu and the balance Pb. The parent phase 2 has open cells in a specified ratio, and the soft alloy 3 is almost uniformly contained in the cell. Self lubricity of the alloy 3 is exhibited between the alloy 3 and the other material to improve fitness, and load is supported by the parent phase 2. Seizure is hardly caused due to the soft alloy 3 until the parent phase 2 is worn with time, and almost the same friction coefficient is maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction sliding member which is excellent in compatibility with a mating material and seizure resistance, and is also excellent in wear resistance and mating attack resistance. This friction sliding member is suitable for use in, for example, a synchronizer ring that constitutes a transmission.

[0002]

2. Description of the Related Art A general synchronizer ring as an example of a friction sliding member has an inner tapered cone formed on the inner circumference and a spline having chamfers formed on the outer circumference. With this synchronizer ring, in the transmission, if the sleeve is axially displaced through the selector, the spline of the sleeve meshes with the spline on the outer periphery through the chamfer, and at the same time, the inner taper cone of the transmission gear approaches the transmission gear. Makes frictional contact with the outer taper cone. In this way, the rotation of the sleeve and the transmission gear is synchronized, and the sleeve meshes with the transmission gear.

As such a conventional synchronizer ring, one composed of iron-based, aluminum bronze-based, and high-strength brass-based forged members is generally known. Also known is a synchronizer ring that employs a friction sliding member such as a thermal spray material, a paper material, or a resin material. For example, Japanese Patent Laid-Open No. 2-739
Japanese Patent Publication No. 03 discloses a synchronizer ring using a resin material, which is obtained by impregnating a Fe-based sintered alloy having a porosity of 3 to 20% with a synthetic resin.

[0004]

However, in recent years, friction sliding members have come to be used under extremely severe conditions. For example, downsizing and weight reduction of transmission,
Due to demands for high load resistance and high rotation resistance, synchronizer rings are also used under extremely severe conditions. As a result, the surface pressure (P) between the inner taper cone of the synchronizer ring and the outer taper cone of the transmission gear is high,
Under high PV conditions in which the relative slip velocity (V) between the two is large, the above conventional synchronizer ring may cause seizure or wear between the inner taper cone and the outer taper cone, which is not yet satisfactory. It was That is, under a high PV condition, a synchronizer ring that employs a high strength brass-based forged member increases the amount of wear due to long-term use. Further, in a synchronizer ring using a thermal spray material, seizure may occur and cracks may occur in the thermal spray material due to poor compatibility with the outer taper cone of the transmission gear. Further, in a synchronizer ring using a paper material or a resin material, it may be melted by heat generation. In particular, in a synchronizer ring using a resin material, if the thermal load is severe, the resin will elute and the friction coefficient characteristics will become unstable. For this reason,
Under high PV conditions, a fully satisfactory synchronizer ring with the outer taper cone of the transmission gear has been desired.

The present invention has been made in view of the above-mentioned conventional circumstances. Even under severe conditions, it is excellent in wear resistance and weak in opponent attacking property, and at the same time, seizure hardly occurs and friction is reduced. An object is to provide a friction sliding member whose coefficient is stable over a long period of time.

[0006]

DISCLOSURE OF THE INVENTION The friction sliding member of the present invention comprises an Al containing 10 to 20% by weight of Si and the balance Al.
-Si alloy powder; 70 to 20 wt% and Mo powder; 3
0 to 80% by weight, porosity; 10 to 20% of the sintered mother phase impregnated into the mother phase, Sn; 2 to 20% by weight, and at least In; 0.05 to 15% by weight % And C
u; 0.01 to 5% by weight, and a soft alloy composed of the balance Pb.

The reasons for limiting the composition and porosity of the mother phase will be described below. [Si in Al-Si alloy powder; 10 to 20 wt% (hereinafter, wt% is simply referred to as%)] Si is 10%
If it is less than the above range, the hardness becomes low and the amount of wear increases rapidly. On the other hand, if Si exceeds 20%, the attacking property of the opponent becomes large. [Mo powder; 30 to 80%] When the Mo powder is less than 30%, plastic flow occurs on the friction surface, and wear rapidly increases. On the contrary, when the Mo powder content exceeds 80%, the attacking property against the opponent becomes large. [Porosity: 10 to 20%] The porosity of the mother phase was set to 10 to 20% in order to secure familiarity relating to seizure prevention and abrasion resistance on the friction surface. That is, if the porosity is less than 10%, the matrix phase occupies a large area, so that the wear resistance is secured, but if the conditions are severe, wear with a slight seizure occurs. Further, at this time, since the state of impregnation of the soft alloy into the pores is poor and the area occupied by the soft alloy is small, seizure occurs and the attacking property of the mating material is large, resulting in a decrease in durability. On the contrary, when the porosity exceeds 20%, the occurrence of seizure can be suppressed, but since the impregnated soft alloy occupies a large area, the hardness of the friction surface is low and the amount of wear increases. Further, at this time, since the area occupied by the mother phase is small, the strength as the friction sliding member cannot be maintained, and peeling or the like may occur.

Next, the reason for limiting the composition of the soft alloy will be described. [Sn; 2 to 20%] Sn imparts corrosion resistance and wear resistance to the soft alloy. If Sn is less than 2%, the effect of improving corrosion resistance and wear resistance is small. On the other hand, when Sn exceeds 20%, the hardness of the soft alloy at high temperature decreases, and the wear resistance deteriorates. Sn; 5 to 15% is more preferable. [At least In; 0.05 to 15% and Cu; 0.0
1 to 5% of one] In imparts corrosion resistance to the soft alloy,
It also forms an intermetallic compound with Sn to stabilize Sn and improves the conformability of the soft alloy. In is 0.05
If it is less than%, these effects are small. On the other hand, when In exceeds 15%, the hardness of the soft alloy is reduced and the wear resistance is deteriorated. In: 3 to 10% is more preferable.

Cu densifies the structure of the soft alloy and imparts wear resistance. If Cu is less than 0.01%, the wear resistance is low. On the other hand, when Cu exceeds 5%, the corrosion resistance and fatigue resistance deteriorate. Cu; 1 to 3.5% is more preferable. If at least one of In and Cu is contained, the effect is exhibited. When the friction sliding member of the present invention is used in the synchronizer ring and the parent phase is used only in the tapered cone, the parent phase has a thickness of 0.5 to 1.5.
It is preferably mm. If it is less than 0.5 mm, the strength is insufficient, and if it is more than 1.5 mm, the cost is high.

[0010]

In the friction sliding member of the present invention, the predetermined Al--Si
System alloy powder and Mo powder are sintered at a predetermined ratio,
The powder acts as hard particles. Further, the mother phase thus sintered has continuous pores inside. The soft alloy is impregnated in the continuous pores, and the soft alloy is substantially uniformly contained in the matrix phase. The soft alloy is made of a Pb-Sn-In-based alloy or a Pb-Sn-Cu-based alloy and exhibits self-lubricating properties with the mating material to improve the compatibility with the mating material. For this reason, this friction sliding member is excellent in wear resistance and weak in opponent attacking property. The mother phase is Al-
It is a sintered body of Si + Mo alloy and supports a load. Then, in the mother phase impregnated with the soft alloy, seizure hardly occurs due to the soft alloy until the mother phase impregnated with the soft alloy is completely abraded over time, and substantially the same friction coefficient is maintained.

If the mother phase is formed by thermal spraying, although the pores are present, the pores are smaller than in the sintered body and the pores are not continuous. For this reason,
Even if the soft alloy is impregnated into the independent pores, the soft alloy is impregnated only in the vicinity of the surface. Therefore, in this case, since the matrix phase impregnated with the soft alloy is thin, if the matrix phase impregnated with the soft alloy is worn away with time, the matrix phase formed by thermal spraying will be worn, There is a concern that seizure will occur. Further, in this case, since the matrix phase impregnated with the soft alloy is thin, the self-lubricating property can be exhibited only in the initial stage of wear, and the friction coefficient changes with time in a short period of time.

In Japanese Patent Laid-Open No. 59-145764, an Fe alloy sintered body having a porosity of 15 to 50% is impregnated with a Pb alloy having lubricity, which is "excellent in vibration damping and lubricity. A "ferromagnetic composite sintered material" is disclosed. However, since this ferromagnetic composite sintered material is intended for a solenoid valve that requires magnetism, it is mainly used for F
It does not disclose any friction sliding member of the present invention having a mother phase containing e, and the mother phase mainly containing Al.

Further, in Japanese Patent Laid-Open No. 1-252744, Cu-Zn-Al-Si- having a porosity of 0.05 to 5% is disclosed.
A "Cu-based sintered alloy synchronization ring (synchronizer ring) made of a Mn-based sintered alloy" is disclosed. However, the synchronizer ring mainly composed of Cu is
It is likely to be sulfided in gear oil to generate CuS, which may corrode and impair durability. On the other hand, since the friction sliding member of the present invention mainly contains Al, it does not generate CuS in the gear oil when applied to the synchronizer ring,
Exhibits excellent durability.

[0014]

【Example】

(1) Hereinafter, Examples 1 and 2 in which the friction sliding member of the present invention is embodied in a synchronizer ring will be described together with Comparative Examples 1 to 6 with reference to the drawings. (Embodiment 1) The synchronizer ring of Embodiment 1 is shown in FIG.
As shown in FIG. 2, a ring-shaped main body 1 and a mother phase 2 brazed to an inner tapered cone portion 1a of the main body 1
And the soft alloy 3 infiltrated into the pores of the mother phase 2.

The body 1 is a JI formed by cold forging.
It is made of SSPCC. The mother phase 2 is 70 (Al-15S
i) + 30Mo (Si in Al-Si alloy powder;
15%, balance Al. The same Al-Si alloy powder; 70%,
Mo powder; 30%. The same applies hereinafter. ) And having a porosity of 15%. This mother phase 2 was obtained as follows. First, Al-15Si alloy powder (particle size φ60 to 70
μm) and Mo powder (particle diameter φ45 to 50 μm) were prepared, and Al-15Si alloy powder 70% and Mo powder 30% were mixed. This mixed powder is molded into a predetermined shape at a pressure of 7 ton / cm ² to obtain a molded body. This molded body was sintered at a temperature of 500 ° C. for 60 minutes in an atmosphere of ammonia decomposition gas to obtain a sintered body having a thickness of 1 mm. The porosity of this sintered body is 15%
Met. Then, this sintered body was brazed to the inner taper cone portion 1a of the main body 1.

The soft alloy 3 is Pb-10Sn-6In.
(Sn: 10%, In: 6%, balance Pb. The same applies hereinafter). This soft alloy 3 was obtained as follows. First, a metal powder is melted at 300 ° C. so as to have the above composition, and a molten metal is prepared. And the mother phase 2 in this molten metal
Was immersed for 60 minutes, and the soft alloy 3 was infiltrated into the pores of the mother phase 2. The inner cone of the synchronizer ring thus obtained had a hardness of Hv180 and a surface roughness of 20 μmR.
It was z. (Example 2) The synchronizer ring of Example 2 is the same as that of Example 1 except that the soft alloy is Pb-10Sn-2Cu. The hardness of the inner taper cone of the thus-obtained synchronizer ring is Hv1.
70, and the surface roughness was 20 μmRz. Comparative Example 1 The synchronizer ring of Comparative Example 1 is the same as that of Example 1 except that the porosity of the matrix is 8%. In other words, this synchronizer ring has a molding pressure of the mixed powder used in Example 1 above of 9 ton / cm.
² and the other manufacturing method was the same as in Example 1 to obtain. The inner cone of the synchronizer ring thus obtained had a hardness of Hv210 and a surface roughness of 20 μmRz.
Met. Comparative Example 2 The synchronizer ring of Comparative Example 2 is the same as that of Example 1, except that the porosity of the mother phase is 22%. That is, this synchronizer ring
The mixing pressure of the mixed powder used in Example 1 was set to 6 ton / c.
m ² and the other manufacturing method was the same as in Example 1 The inner cone of the synchronizer ring thus obtained had a hardness of Hv130 and a surface roughness of 20 μmR.
It was z. (Comparative Example 3) The synchronizer ring of Comparative Example 3 is the same as that of Example 1, except that the pores of the mother phase are infiltrated with the polyamide resin. The inner taper cone of the thus obtained synchronizer ring had a hardness of Hv130 and a surface roughness of 20 μmRz. (Comparative Example 4) The synchronizer ring of Comparative Example 4 was the same as Example 1 except that a plating layer consisting of Sn; 10%, In; 6% and the balance Pb was formed on the surface of the mother phase. It is a thing. The inner tapered cone of the synchronizer ring thus obtained had a hardness of Hv100 and a surface roughness of 2
It was 0 μm Rz. (Comparative Example 5) The synchronizer ring of Comparative Example 5 is the same as that of Example 1 except that a soft alloy is not formed. The inner cone of the synchronizer ring thus obtained had a hardness of Hv220 and a surface roughness of 20 μmRz.
Met. (Comparative Example 6) The synchronizer ring of Comparative Example 6 is a high strength brass system (Zn-60Cu-5A) which is generally used.
It is a forged product of l). The inner taper cone of the thus obtained synchronizer ring had a hardness of Hv220 and a surface roughness of 20 μmRz. (Evaluation 1) A simple friction test was performed using the synchronizer rings of Examples 1 and 2 and Comparative Examples 1 to 6. The test conditions were a rotation speed of 1400 rpm, a pressing force of 100 kgf,
The oil temperature is 120 ° C and the maximum number of joints is 10,000 times. The mating material is a chrome steel hardened material. Gear oil 75W-90 was used as the lubricating oil, and the amount of oil was up to the center of the synchronizer ring.

FIG. 3 shows the relationship between the friction coefficient (μ) generated between the inner taper cone of the synchronizer ring and the mating material and the number of joints (cycle). It can be seen from FIG. 3 that the synchronizer ring of Example 1 has a friction coefficient of 0.08, which is rather low, but the friction coefficient is stable over a long period of time without change. The synchronizer ring of Example 2 has a friction coefficient of 0.07 and is stable for a long period of time without change. That is, in these synchronizer rings, the stability of the initial friction coefficient is excellent. This is because the matrix has continuous pores at a predetermined ratio, and the soft alloy made of Pb-Sn-In alloy present in the pores improves the compatibility with the mating material especially at the initial hitting stage. It is believed that this is because
It is also found that In and Cu have the same effect on the friction coefficient in the soft alloy.

On the other hand, in the synchronizer ring of Comparative Example 1, the coefficient of soft alloy is smaller than that of Examples 1 and 2, so that the coefficient of friction is high, but the coefficient of friction change at the initial hitting stage. It turns out to be big. Further, it can be seen that in the synchronizer ring of Comparative Example 1, seizure tends to occur and the friction coefficient tends to increase as the number of joints increases.

On the contrary, in the synchronizer ring of Comparative Example 2, since the proportion of the soft alloy is larger than that of Examples 1 and 2, the stability of the friction coefficient is not a problem, but the friction coefficient is less than 0.
It is as low as 05, and it can be seen that the minimum required value of 0.07 for synchronizer ring is not reached. In the synchronizer ring of Comparative Example 3, since the polyamide resin was infiltrated, the friction coefficient was slightly lower than that of Examples 1 and 2. Further, in this synchronizer ring, due to the drawback that the polyamide resin is an organic substance, when the number of joints increases and the load (especially thermal load) becomes severe, the polyamide resin elutes from the pores and the friction coefficient tends to increase. I understand.

The synchronizer ring of Comparative Example 4 was excellent in initial running-in, but after 3000 cycles, only the parent phase was formed due to wear of the plating layer, the friction coefficient sharply increased, and seizure occurred. In the synchronizer ring of Comparative Example 5, the friction coefficient tended to increase after 5000 cycles, and seizure occurred at 7000 cycles.

In the synchronizer ring of Comparative Example 6, 2
After 000 cycles, the friction coefficient tends to decrease. Next, FIG. 4 shows the relationship between the wear amount of the synchronizer ring (the axial displacement amount δ (mm) of the synchronizer ring) and the number of joints (cycle). It can be seen from FIG. 4 that in the synchronizer ring of the first embodiment, even if the number of joints is increased, the amount of wear is small, the opponent aggression is weak, and the axial displacement is almost stable. Further, in the synchronizer ring of the second embodiment, the wear amount is slightly larger than that of the first embodiment, but it is understood that the target of 0.4 mm is satisfactory. It is considered that, in these synchronizer rings, the load is supported by the sintered body of the Al-Si + Mo-based alloy of the mother phase while ensuring the compatibility with the counterpart material at the predetermined soft alloy portion. Because. As for the wear amount, In and C in the soft alloy
It can also be seen that the same effect as u can be obtained.

On the other hand, in the synchronizer ring of Comparative Example 1, the amount of wear from the time when it is about to burn is large. In the synchronizer ring of Comparative Example 2, since the soft alloy occupies a large proportion, wear is accelerated in the initial stage,
It is on the back. In the synchronizer ring of Comparative Example 3, since the polyamide resin is infiltrated into the pores, the amount of wear is slightly larger than in Examples 1 and 2, and the wear increases as the number of joints increases. ..

In the synchronizer ring of Comparative Example 4, the amount of wear increased in the initial stage, reaching the back surface.
In the synchronizer ring of Comparative Example 5, the amount of wear rapidly increased due to the occurrence of seizure. In the synchronizer ring of Comparative Example 6, the amount of wear increased as the number of joints increased, and back contact occurred. (Evaluation 2) Next, the synchronizer rings of Examples 1 and 2 and Comparative Examples 5 and 6 were incorporated into an actual machine, and the effect of the actual machine was confirmed. In the test, a horizontal manual transmission for a 1600 cc engine was used to perform a hard shift 100,000 times to confirm the presence or absence of seizure, the amount of wear, and the presence or absence of gear squeal. The amount of wear was measured by the amount of movement (mm) with a taper gauge. The results are shown in Table 1.

[0024]

[Table 1] From Table 1, it can be seen that the synchronizer ring of Example 1 does not cause seizure, has a very small amount of wear, and does not cause gear squeal, as compared with those of Comparative Examples 5 and 6. Further, in the synchronizer ring of the embodiment, the wear amount is slightly larger than that of the embodiment 1, but the target of 0.6 mm is satisfactory, and seizure does not occur, which is good. I know there is.

From the evaluations 1 and 2, the synchronizer rings of Examples 1 and 2 had a higher surface pressure with the mating material and a larger relative sliding speed with the mating material than those of Comparative Examples 1 to 6. It can be seen that even under these conditions, the abrasion resistance is excellent, the opponent attack is weak, seizure hardly occurs, and the friction coefficient is stable for a long period of time. (2) Next, a confirmation test in which the composition of the parent phase, the porosity of the parent phase and the composition of the soft alloy in the friction sliding member of the present invention are limited will be described with reference to the drawings. (Composition of mother phase) Under the same conditions as those of the mother phases of Examples 1 and 2,
Aluminum bronze (Cu-9.7Al-1.2Fe-0.
02Ni) powder-sintered film, Al-Si alloy (Al-15Si) powder-sintered film, Fe-Mo
-C alloy (Fe-13.5Mo-2.46C) powder sintered film, Fe-Cr-C alloy (Fe-62.
7Cr-7.5C) powder-sintered film and Mo (containing a small amount of Mo oxide) powder-sintered film were prepared.

Each of these five types of films was subjected to test piece evaluation. FIG. 5 shows the amount of wear of the coating (mg) and the amount of wear of the mating material (mg). Further, in FIG. 6, the seizure load (× 10
³ N). From FIG. 5 and FIG. 6, since the film made of the Al—Si alloy powder and the film made of the Fe—Mo—C alloy powder have a small amount of wear of the film and the mating material, and a high baking load, It was confirmed that these two compositions were suitable as the mother phase.

Next, aluminum bronze powder, Al--Si alloy powder, Fe--Mo--C alloy powder or Fe--Cr--.
Mo powder was added to C-based alloy powder in an amount of 0 to 50%, and a film was formed under the same conditions as in the mother phases of Examples 1 and 2. Further, Al-Pb (Al-1) is added to Al-Si alloy powder, Fe-Mo-C alloy powder or Fe-Cr-C alloy powder.
0Pb) -based alloy powder is added in an amount of 0 to 50%.
A film was formed under the same conditions as the mother phase of. FIG. 7 shows the baking load (× 10 ³ N) of each film to which Mo powder was added under the same conditions as the test conditions of FIG. In addition, under the same conditions, the baking load of each coating to which the Al-Pb-based powder was added (x
10 ³ N) is shown in FIG. From FIGS. 7 and 8, Al-S
It was confirmed that a film made of i + Mo alloy was most suitable.

Then, Mo powder; fixed at 30%, Al
-Si in the Si-based alloy powder was variously changed to 0 to 25%, and a film was formed under the same conditions as those of the mother phases of Examples 1 and 2.
Abrasion amount of each film by test piece evaluation (× 10 ³ cm
³ ) and the adhesion strength (MPa) are shown in FIG. 9, and the mating material wear depth (μm) is shown in FIG. From FIGS. 9 and 10, Al-
It was confirmed that if Si in the Si-based alloy powder is 10 to 20%, the amount of wear is small, the adhesion strength is large, and the opponent attacking property is weak.

Further, the Mo powder added to the Al-15Si alloy powder was variously changed from 0 to 85% to form a film under the same conditions as those of the mother phases of Examples 1 and 2. FIG. 11 shows the wear amount (μm) of each film by the test piece evaluation, and FIG. 12 shows the wear depth (μm) of the mating material. From FIGS. 11 and 12,
It was confirmed that the wear amount was small when the Mo powder was added to the Al-15Si alloy powder at 30 to 80%.

Therefore, as a mother phase, 10 to 20%
Al-Si alloy powder consisting of Si and balance Al; 7
Al consisting of 0 to 20% and Mo powder; 30 to 80%
It can be seen that a -Si + Mo-based alloy is suitable. (Porosity of mother phase) Prepare synchronizer rings having the same composition as in Examples 1 and 2 but different in porosity from 5 to 25%, and under the same conditions as in Evaluation 1, the wear amount of the synchronizer rings ( The displacement amount, mm) and the wear amount (μm) of the outer taper cone in the transmission gear were obtained. The results are shown in Fig. 13. From FIG. 13, it is understood that when the porosity is 10 to 20%, the wear amount of the synchronizer ring and the outer tapered cone is small, which is excellent. (Composition of soft alloy) Pb-Sn-In (Pb-10Sn
-5In) -based soft alloy and Sn-Pb-Cu (Sn-7)
Pb-4Cu) based soft alloy and Cu-Pb-Sn (Cu
-20Pb-5Sn) based soft alloy and Pb-Sn-Cu
A (Pb-10Sn-2Cu) -based soft alloy is melted in the same manner as in Example 1, and the soft phase of Example 1 is used to infiltrate each soft alloy into the pores of the hard phase as in Example 1. It was In this way, a baking load (× 10 ³ N) was obtained for each of the obtained films by the test piece evaluation. The results are shown in Fig. 14. From FIG. 14, Pb-Sn-In based soft alloy and Pb-Sn
It was confirmed that the Cu-based soft alloy exhibits a high seizure load property.

Therefore, as the soft alloy, Sn; 2
~ 20% and at least In; 0.05-15% and C
It can be seen that the one composed of u; 0.01 to 5% and the balance Pb is preferable. In Examples 1 and 2 and the confirmation test, the soft alloy was impregnated into the pores by the infiltration method, but the invention is not limited to the infiltration method as long as the matrix contains the soft alloy uniformly. For example, the PVD method or the like can be adopted. Further, the mother phase may be not only the inner tapered cone but also the body.

[0032]

As described above in detail, since the friction sliding member of the present invention adopts the structure described in the claims, it has a high surface pressure with the mating material and the mating material. Even under the condition that the relative slip velocity is high, the following excellent effects can be obtained. Since this frictional sliding member has self-lubricating properties, it exhibits excellent wear resistance and does not attack the mating material very strongly.

Further, this friction sliding member is unlikely to cause seizure and can maintain a stable friction coefficient for a long period of time. Therefore, if this friction sliding member is adopted in, for example, a synchronizer ring of a transmission,
Since the above effects can be achieved even under severe conditions, recent demands for downsizing, weight reduction, high load resistance, high rotation resistance, and the like of the transmission can be suitably realized.

Further, in the friction sliding member of the present invention, since the mother phase is sintered, when applied to the synchronizer ring, the formability and the dimensional accuracy are improved as compared with the conventional forged product. Excellent in Therefore, the friction sliding member can be applied to the entire synchronizer ring, and the spline chamfer can exert the above-mentioned excellent effects.

Further, in the friction sliding member of the present invention, Cu is not used for the mother phase, and when it is applied to the synchronizer ring, it is not sulfided in the gear oil to generate CuS, so that corrosion is less likely to occur, It can exhibit excellent durability.

[Brief description of drawings]

FIG. 1 is a sectional view of a synchronizer ring according to a first embodiment.

2 relates to the synchronizer ring of Embodiment 1, and FIG.
It is an expanded sectional view in a circle.

FIG. 3 is a graph showing the relationship between the number of joints and the friction coefficient in Examples 1 and 2 and Comparative Examples 1 to 6.

FIG. 4 is a graph showing the relationship between the number of joints and the amount of axial displacement in Examples 1 and 2 and Comparative Examples 1 to 6.

FIG. 5 is a graph showing the difference in the amount of wear of the coating and the amount of wear of the mating material due to the difference in the composition of the mother phase.

FIG. 6 is a graph showing a difference in seizure load due to a difference in composition of a mother phase.

FIG. 7 is a graph showing the difference in seizure load due to the difference in the composition of the mother phase due to the amount of Mo added.

FIG. 8 is a graph showing the difference in seizure load due to the difference in the composition of the mother phase due to the added amount of Al—Pb.

FIG. 9 is a graph showing the difference in the amount of wear and the adhesion strength due to the difference in the composition of the parent phase due to the amount of Si.

FIG. 10 is a graph showing the difference in wear depth of the mating material due to the difference in the composition of the parent phase due to the amount of Si.

FIG. 11 is a graph showing the difference in the amount of wear of the coating due to the difference in the composition of the mother phase due to the amount of Mo added.

FIG. 12 is a graph showing the difference in wear depth of the mating material due to the difference in the composition of the parent phase due to the amount of Mo added.

FIG. 13 is a graph showing a difference in wear amount of a synchronizer ring and a wear amount of an outer taper cone due to a difference in porosity.

FIG. 14 is a graph showing a difference in seizure load due to a difference in composition of soft alloys.

[Explanation of symbols]

 1 ... Main body 1a ... Inner taper cone part 2 ... Mother phase 3 ... Soft alloy

Claims (1)

[Claims] 1. An Al-Si alloy powder comprising 10 to 20% by weight of Si and the balance Al; 70 to 20% by weight, and Mo.
Powder: 30-80% by weight, porosity: 10-2
0% sintered mother phase, impregnated into the mother phase, Sn; 2-20% by weight, at least In; 0.05-15% by weight and Cu; 0.01-5
A frictional sliding member, characterized by comprising one of weight% and a soft alloy comprising the balance Pb.