JPS61194134A - Combination of member - Google Patents

Abstract

PURPOSE:To obtain combination of member in which wear characteristics of both members at sliding surface opposing with each other, by composing one member of composite material as strengthening material having alumina-silica fiber contg. mullite crystal and composing the other member of steel. CONSTITUTION:Sliding surface part of the first member against the second member is composed of composite material contg. alumina-silica fibers as strengthening material and the following prescribed metal as matrix. The sliding surface part of the second member against the first member is composed of steel having >=200 Hv (10kg) hardness. Said composite material is composed of 35-65wt% Al2O3, 65-35wt% SiO2, and 0-10wt% the other components, and is alumina-silica fiber contg. >=10wt% mullite crystal quantity. Alumina- silica fiber as strengthening material in which nonfiber coarse particle having >=150mu diameter contained in aggregate of said fiber is <=5wt%, and metal among Al, Mg, Sn, Pb, Zn and alloy composed mainly of these metal are used as matrix, further vol. ratio of said fiber is prescribed to >=0.5%.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combination of two members that are in contact with each other and are relatively lable, and more particularly, one member is made of alumina-silica fibers containing mullite crystals. It relates to a combination of two members, one made of a reinforcing material and a composite material, the other made of steel.

BACKGROUND OF THE INVENTION Special mechanical properties are often required in some parts of the components and members of weighing machines. For example, in automobile engines, as demands for engine performance become higher, members such as pistons not only have excellent specific strength and rigidity, but also have vibration surfaces that have excellent wear resistance. There has been a strong demand for this. As a means of improving the specific strength, wear resistance, etc. of such members, attempts have been made to construct them from composite materials that have various inorganic fibers as reinforcements and metals such as aluminum alloys as a matrix. ing.

As one of such fiber-reinforced metal composite materials, a patent application filed in 1986 filed by the same applicant as the applicant of the present application has been proposed.
No. 1, the reinforcing material is alumina-silica fiber containing mullite crystals, and the matrix is made of aluminum alloy.
Fiber-reinforced metal composite materials have already been proposed, and such fiber-reinforced metal composite materials can improve the specific strength, wear resistance, etc. of members made of them.
Furthermore, a composite material that is less expensive than a composite material using alumina IJAIN1 or the like as a reinforcing material can be obtained.

Problems to be Solved by the Invention However, when two members are brought into contact with each other and are brought into relative contact with each other, when one of the members is made of a fiber-reinforced metal composite material as described above. Depending on the material of the other parts, the wear and tear of the other parts increases dramatically.
So here we are! It cannot be used as a combination of sliding members that contact each other and slide relative to each other.

Trees W45e and others are in contact with each other and relatively M 1h
-16 A combination of two members, one of which is a mH-reinforced gold metal whose reinforcement is alumina-silica fibers containing mullite crystals, which are strong, rigid, and inexpensive, and whose matrix is a metal such as an aluminum alloy. In a combination of parts where one part is made of base material and the other part is made of steel, in order to minimize the wear and tear of both parts, it is necessary to consider the combination of their materials and properties. As a result of conducting various experiments, it was found that what is appropriate should be determined experimentally (as a result of conducting research, each number does not depend on specific special electric currents and specific properties).

The present invention is based on the knowledge obtained as a result of the above-mentioned experimental research conducted by the inventors of the present invention, and the present invention is based on the findings that one member is reinforced with alumina-silica fibers containing mullite crystals and a metal such as an aluminum alloy is used as a matrix. It is a combination of two members made of immmm reinforced Kanakura composite material and the other member made of steel, which abut each other and ate relatively, and the vibration plane of both members relative to each other is The objective is to provide a combination of two components with improved wear properties.

Means for Solving the Problems According to the present invention, the above-mentioned object is achieved by combining a first member and a second member that are in relative contact with each other, less than 13 (to the second member)
The sliding surface part is 35~Q5wt%All! 03.65-3
5wt%5iO1! An alumina-silica fiber having a composition of 0 to 10 wt% other components and a mullite crystal content of 15W% or more, the particle size contained in the aggregate being 1
Selected from the group consisting of aluminum, ngnesium, tin, copper, lead, zinc, and alloys containing these as one component, using alumina-silica fibers as a reinforcing material with a content of non-fibrous particles of 50μ or more and 5wt% or less The second member is made of a composite material having a matrix of metal as a matrix and a volume percentage of alumina-silica fibers of 0.5% or more, and at least the sliding surface portion of the second member relative to the first member is hard. SaH
v (Achieved by a combination of members characterized in that 10 kl is made of steel of 200 or more.

Functions and Effects of the Invention According to the present invention, the composite material constituting the PITE surface portion of the first member contains mullite crystals which are much cheaper and stable than alumina fiber M or the like. Alumina-silica mu increases the volume fraction to 0.5% or more (the matrix metal is strengthened, and the grain size is 150 μJ The side is 5w
t% or less, and the sliding surface of the second member has a hardness of f-
1v (10kg) is made of steel of 200 or more, so it comes into contact with n and relatively W! A combination U of two moving members, where λ・
The sliding surfaces of both components are highly wear-resistant, thereby minimizing the amount of wear on the respective sliding surfaces of both components and reducing the "Rm" caused by IIQ drop of particles. ″
Wear can be avoided, and one of the members can have a combination of members with improved mechanical properties 11 such as specific strength and rigidity, and machinability.

Generally, alumina-silica fibers are broadly classified into alumina fibers and alumina-silica fibers in terms of their composition and manufacturing method. Al2O3 content is 70WI% or more and 5i02
So-called alumina fibers containing 3Qwt% or less are made into fibers with a mixture of an organic solution and an inorganic salt of fluminiram, and then oxidized and roasted at high temperatures to produce reinforced fibers. Although it has excellent performance, it is very expensive. On the other hand, △1203 containing ω is 35~55w
5tol with t%r! So-called alumina-silica fibers with a concentration of 35 to 65 W (%) are produced by melting a mixture of alumina and silica in an electric furnace, etc., since the mixture of alumina and silica has a lower melting point than alumina. The process of converting the melt into fibers using the blow ink method or spinning method is relatively widely produced in paper warehouses.1 Especially A.
The l2O3 content is more than 65 Wt% and 5iO
If the P content is 35 wt% or less, the melting point of the mixture of alumina and silica will be too high and the viscosity of the melt will be low; on the other hand, if the P content is 35 wt% or more, Si
If the O2 content is 65W% or more, it is difficult to apply these low-[11i] production methods because the appropriate viscosity required for blowing or spinning cannot be obtained.

In addition, for the purpose of adjusting the melting point and viscosity of the mixture of alumina and silica, or imparting special performance to the mixture, CaO, MgO, Na20 is added to the mixture of alumina and silica.
, Fe 203, Cr 2. O3, Zr O2, 'Ti
02, PbO13n 02, ZnO, MOO*
, Ni 01K20. Mn0t, BtOs, VtO
! , CuO1COaOs, and other metal oxides may be added. According to the results of experimental research conducted by the inventors of the present application, it has been found that it is preferable to suppress these components to 10 wt% or less. Therefore, the composition of the alumina-silica fiber as a reinforcing material in the member combination of the present invention is 35 to 65 wt% A + 203.65 to 35 wt%.
t%S! 0++, 0 to 1 Qwt% other components.

10-Ink method or spinning method (The produced alumina-silica 11 has amorphous fibers M7 (mm), and the hardness of the fibers is 1lv700r!1'c.Alumina in such an amorphous state When silica fibers are heated to a temperature of 95" or higher, mullite crystals precipitate and the hardness of mlff increases. According to the results of experimental research conducted by the present invention, the amount of mullite crystals reaches 15 wt% culm 1σ. The hardness of C-bound rapidly increased, and when the mullite crystal injury was 19wt%, Jli
It was observed that the hardness of Sfl was HV100O, and the amount of mullite crystals was increased further, but the hardness of b fibers did not increase much. The wear resistance and toughness of metals reinforced with alumina-silica fibers containing mullite crystals correspond well to the hardness of the alumina-silica fibers themselves.
% or more, it is possible to obtain a lζζ association material with good wear resistance and strong properties. Therefore, in the combination of members of the present invention, 1
, l alumina-silica fiber mullite crystal 61 is 15w
t% or more, preferably 1 gwt% or more.

In addition, in the production of alumina-silica fibers using f11-ink and humans, non-fibrous particles are produced at the same time as fibers.
Therefore, the aggregate of aluminum-silica fibers contains a relatively large amount of non-fibrillated particles. To improve the properties of alumina-silica fibers (when the fibers are heat-treated to precipitate mullite crystals, the J1 fiber particles also become mullite crystals and harden. According to the results of experimental research conducted by the inventors of the present application) For example, if L't has a particle size of 15
Huge particles exceeding 0μ affect the mechanical properties and additives of the composite material]
This deteriorates the properties of the IX composite material, which causes a decrease in the strong grip of the IX composite material, and furthermore causes problems such as permanent wear on the mating material due to particles falling off. Therefore, in the combination of members of the present invention, alumina-silica
The content of non-fibrous particles with a particle size of 150 μm or more contained in the bundle of f pieces is suppressed to 5 wt% or more, particularly 2 wt% or more, and further to 1 wt% or more.

Furthermore, according to the results of experimental research conducted by the inventors of the present application,
The alumina-silica U & silica containing mullite crystals with crushed properties as described above is strengthened & 41M, and aluminum, magnesium, copper, 1lIi lead, lead, tin and alloys containing these as main components are made into 7 trix metals. In the composite material, the volume ratio of aluminum to silica fiber is 0.5.
(b) The wear resistance of the composite material is significantly improved,
Even if the volume fraction of the alumina-silica fiber is higher than this, the amount of wear on the mating material will not increase. Therefore, in the incorporation of the members of the present invention, the volume fraction of the aluminum-booth silica fibers is set to 0.5% or more, particularly 1% or more, and even 2% or more.

In addition, in order to obtain a composite material for one member in the combination of members of the present invention, it has excellent mechanical properties such as strength and wear resistance, and has excellent friction and wear characteristics against the mating member. According to the results of experimental research conducted by the inventors of the present application, alumina-silica fibers containing mullite crystals are
In the case of short fibers, the average linear M diameter of 1.5 to 5.0 μ and 2
It was observed that the fibers had an average fiber diameter of 0μ to 31I1m, and in the case of long fibers, they often had a diameter of 3 to 30μ.

The combination of parts according to this description is 1, for example, cylinder screws 1 to 1 for small automatic engines, piston rings and screws t.
The present invention may be applied to combinations U of members such as various mechanical devices, such as the above.

The present invention will now be described in detail by way of example with reference to the accompanying drawings.

Example 1 Isolai 1-/Alumina made by Pubcock Fireproof Co., Ltd. 1
Silica fiber (product name: Kao Wool J, 51wt%Al
P 03.49wt%5iO2) is subjected to degranulation treatment lip to reduce the content of particles with a particle size of 150μ or more contained in the fiber aggregate to 0.4wt%, and then the fiber aggregate is heated at various high temperatures. By heat-treating the fibers, fibers having various mullite crystal resistances as listed in Table 1 below were formed.

Next, each of the above-mentioned aluminum t-silica fibers was
The alumina-silica fibers are dispersed in the silica powder, stirred, and the alumina-silica fibers are uniformly dispersed to form fibers of <80 x 80 x 20 mn+ as shown in Figure 1 by the vacuum forming method. A body 1 was formed and then fired at 600°C to bond individual alumina-silica fibers 2 with silica. In this case, as shown in FIG. 1, the individual alumina-silica fibers 2 were oriented randomly in the xy plane and stacked in the lZj direction.

Next, as shown in FIG. 2, the fiber molded body 1 is placed into a mold Y cavity 4 of a casting 93.

A molten metal 5 of 730°C aluminum alloy (JIS river grade C8A) is poured into the [-Rudo Ii + Bij), and the molten metal is fitted into the mold 3 by a plunge 1/6 to 1500°C.
kg/'Ill'' pressure and maintain the pressurized state until the melt field 5 is completely solidified, and as shown in Fig.
A cylindrical solidified body 7 of Il is cast, and the solidified bodies 7 and 9 are further subjected to heat treatment Tr, and from each solidified body)) Composite material 11 in which luminal silica fibers are used as reinforcing fibers and aluminum alloy is used as a matrix. ' were cut out, and hardness test pieces and block test pieces for wear tests were made from these composite materials by machining.

After polishing the test surface of the hardness test piece thus formed, the Vickers hardness of the alumina-silica matrix was measured. However, since the size of the fibers themselves is very small, with an average fiber diameter of 2.9μ, we measured the hardness of non-fibrous particles with a relatively large particle size, which allows us to measure the hardness. fi
Hardness of Mirumitsu silica fiber. The measurement results are shown in FIG. 4, in which the horizontal axis represents the amount of mullite crystals in the alumina-silica fibers and the vertical axis represents the hardness of the luminar-silica fibers. From this figure 4, the hardness of alumina-silica fiber is approximately 10W.
It can be seen that although it is low in the range of t% or less, it increases significantly when the mullite crystal content exceeds about 15 wt%, and remains almost constant when the mullite crystal content exceeds about 20 wt%.

Next, the 1-inch small 71 cock test pieces were sequentially loaded into a friction and wear tester, and the bearing steel (JIS standard S
U J 2 ) quenching and tempering U (II! 1! S Hv
630) is brought into contact with the outer periphery of 1 test 11,
Lubricating oil at room temperature (20°C)
While supplying Castle Theta Oil 5 W-30>,
Contact surface pressure 20kg/l1lI12, sliding speed IQ 0.3
A wear test was carried out by rotating the cylindrical test piece for 1 hour.The surface to be tested of the test piece in this wear test was Figure 5 shows the results of the abrasion test on a plane perpendicular to . , the lower half represents one wear reduction (+!? wear reduction fil I phosphorus) of the cylindrical test piece which is the mating member.

From Figure 5, when bearing steel is used as the mating member, the wear amount of the block test piece does not substantially change in the range of mullite crystal content in the alumina-silica fibers from 0 to 11 wt%. However, in the range where the amount of mullite crystals is 11 to 19 wt%, it decreases significantly as the amount of mullite crystals increases,
When the amount of mullite crystals is 19W [5 or more], the value becomes substantially constant, whereas the amount of wear on the cylindrical test piece is
It can be seen that the lead content is substantially constant regardless of the amount of crystals in the silica fiber.

The relationship between the mullite crystal grains and the wear amount of the block test piece shown in Figure 5 corresponds to the relationship between the hardness of the alumina-silica fiber and the amount of mullite crystals shown in Figure 4. From Figure 5, part 1 is made of a composite material in which alumina-silica fibers are used as reinforcing fibers and aluminum alloy is used as a matrix. In order to reduce both the amount of wear and the amount of wear of the steel mating member that undergoes abrasion, the luminal silica fibers should be alumina-silica fibers with crystal 7'j containing mullite crystals. is preferable,
In particular, the amount of mullite crystals in alumina-silica fiber is 15W.
(It can be seen that it is preferable that it is % or more F, more preferably 19w [5 or more).

Example 2 (above) From Example 1 of the book, it was found that the amount of mullite crystals in the alumina-silica fiber is preferably 15W [% twin], so what is the appropriate volume percentage of the alumina-silica fiber? 1/J and then a wear test was conducted with the mullite crystal i1 of the alumina-silica fiber set at 62 wt%.

First, 55wt%At 20*, 45wt%S! 02
Alumina-silica fibers having a composition of 0.05 to 0.0000000000000000000000000000000000 to
After reducing it to 2%, the amount of mullite crystals was reduced to 62wt by heat treatment.
%. Then, the volume fraction of the fibers was adjusted to various values as shown in 2 below in C.
Furumi Inu - Silica fiber and copper alloy (Ou -10w
t%Sn) powder using a scale FIL, a small amount of 1 Knorr was added thereto, and the mixture was mixed for about 30 minutes using a Star Two. Thus l! After drying the mixed mixture at 80°C for 5 hours, the cross-sectional dimensions were 15,02 x 6, 52 mo.
Fill the predetermined amount of # and hardware into the metal plate 1 that is on the right side of the + cavity, and pour the mixture into the pan 1.T /1000k<1/
It was molded into a plate shape by compressing it at a pressure of . Next, each -C plate was sintered by heating at 770'G for 30 minutes in a batch type sintering furnace set in a decomposed ammonia gas (point B -30°C) atmosphere. A composite material was manufactured by slow cooling in a cooling zone.

7 for friction and wear testing from 44 composite materials
One cock test piece was formed, and bearing steel (JIS standard 5LJJ2, reflected Hv
A wear test was conducted using a cylindrical test piece manufactured by 710) as a mating member. The results of this wear test are shown in Figure 6. In Fig. 6, soil 1 (minute is 1? wear fast wear scar depth μ) of the block test piece, and the lower half shows the wear ff1 (llf wear loss toughness) of the cylindrical test piece with the mating member. represents.

From Figure 6, we can see that the abrasiveness of a composite material reinforced with alumina-silica fibers containing l\ft crystals is as follows: the volume fraction of alumino-silica fibers decreases by about 0.5%. However, in order to ensure the wear resistance of the composite material, the volume fraction of alumina-silica NW4Ill must be O.

It can be seen that it is rare for a strike rate of 1.0% or more to exceed 42.0% in history. In addition, the amount of wear on the opponent's hand is determined by the volume ratio of the aluminum car silica uA string being Oo;]% or more. It can be seen that the number of people actually increases to 11 people.

The same wear test as in Example 2 above was conducted using the volume fraction of the aluminium-silica fiber as a parameter when the matrix metal was an aluminum alloy, a magnesium alloy, and 11! ! lead alloy,
When a block test piece made of composite material fil, which is a lead alloy and a tin alloy, was also tested, results showing the same tendency as the bundling shown in FIG. 6 were obtained.

Example 3 - [From Example 2 described above, it was found that the volume fraction of alumina-silica fiber is preferably 0.5% or more,
A wear test was conducted to determine the appropriate properties of the steel constituting the other member, with the volume fraction of alumina-silicon tJ m 1 m set at 6.9%.

A wire scrap 1 molded body was formed from the alumina-silica fibers shown in Table 3 below using the same packaging as in Example 1, and the fiber molded body was used as a reinforcing material.
Composite material #l with IS standard AC8A> as a matrix was cast using high-temperature casting method (temperature and humidity 730°C, pressure applied to the molten metal 150°C).
Ty for each composite material.
After heat treatment, the height is 16x6x10II1m
Block test pieces 01 to C6 were created using one of the blocks (16×10 mm) as a test cloth. In addition, as a comparative example, aluminum alloy (JIS standard A C8A)
Amorphous alumina-silica/J 4mMt (55wt% Al 20
G, 45wt%S! 02) J: Rinari fiber volume fraction is 6
．． Composite material using 5% square wire scrap 1 molded body as reinforcement and aluminum alloy (JIS standard 80 to △) as matrix.
I created r.

These test pieces were pitted one after another in the LFW friction and wear tester, and the mating parts, which had an outer diameter of 35n+i, an inner diameter of 30mm,
Contact the outer peripheral surface of a steel cylindrical test piece with a width of 10 + nm, and while supplying palm-knit lubricating oil (Castle Seven-Tall Aile 5W-30) to the contact area of the test piece, k
A wear test was conducted by rotating a cylindrical specimen for 1 hour at a sliding speed of 10.3 s/sec. ) was set to various values, and the combination Co-
A C test was conducted for Cr.

Table 4 Note: 1) JIS standard 5LJS420J22) J
I S large q grade 5 () J 23) JIS standard SC
r 20 Carburizing and quenching The results of the wear test described in 1 are shown in Figure 7. In addition, Fig. 7 (d) ρ (, 17'l' min (J/represents the wear amount of the rock test piece (wear 1FJ depth μ), d3, and the half is 1? of the cylindrical test piece with the mating material). Wear time (loss of wear: 1m)
q) is represented by J3, and the symbols Oo and ~C7 correspond to the combinations tICo to Cr of Test 11 in Table 4, respectively.

From this Figure 7, it can be seen that the wear of the block test piece C1-1 is the same as that of the block test piece C1- made only of aluminum alloy and the alumina-silica U & miscellaneous (some block test) in which the reinforcing fibers are amorphous. Except for the piece Cr, which is very small, there is almost no difference in hardness depending on the material of the steel used as the partner material, and the amount of wear of the cylindrical test piece as the counterpart material is the same as that of the material 'P.
, [Regardless of the hardness l-1v (10 ni) is 200 or more,
F, preferably 250 or more, is considered to be small.

Example 4 The following person 5 was treated in the same manner as in Example 1 of
A fiber molded body made of aluminum dog-silica fibers shown in Figure 1 is formed, the fiber molded body is used as a reinforcing material, and a composite material containing magnesium alloy (JIS standard MDC1-A) with a density of 71 to 71 is formed by high pressure casting method (measurement). It was manufactured at a temperature of 700°C and a pressure of 1500 kQ/Lll+!
Created D+. In addition, a block test piece Do of the same size made only of magnesium alloy (JLS standard MDC1-A) was prepared in a comparative example. These push test pieces were subjected to the same wear test as in Example 3. U.S. 420
J2) Made with a surface pressure of 5kO/'111+12
The test was conducted for 30 minutes.

The results of this wear test are shown in FIG. From this figure 8,
Also for J&1 where the matrix is a magnesium alloy,
The volume fraction of alumina-silica fiber, the intercrystalline mullite of alumina-silica fiber, and the hardness of steel are within the range of the present invention f! 1
It can be seen that in the case where the test piece is the same, the amount of wear of both the block test piece and the cylindrical test piece becomes a very small value.

In addition, the same wear test as in this example was carried out on block specimens cut from composite materials formed in the same manner, except that the matrix was made of copper alloy, tin alloy, tin alloy, and zinc alloy. Similar to the results shown in FIG. 8, when the volume fraction of alumina-silica fibers, the mullite intercrystals of alumina-silica fibers, and the hardness of steel were within the range of the present invention, 10 test pieces and It was found that the wear interval between both cylindrical test pieces was small.

From the results of each example described in 1, it is clear that the printing #J? It is a combination of two members, one of which is made of a composite material with alumina-silicon fibers containing mullite crystals as a reinforcing material and gold such as aluminum alloy as a matrix, In a combination of two members in which the other member is made of steel, the composite material constituting the one member weighs 35.-65wt.
%A1, 03.65~35wt%S i Op, 0~
The composition is 10wt% other components and the amount of mullite crystals is 1
The reinforcing material is aluminum t-silica fiber containing 5 wt% or more of aluminum t-silica fiber, and the alumina-silica fiber containing 5 wt% or less of non-fibrous particles with a particle size of 1550 μm or more in the aggregate. A composite material in which the matrix is a metal selected from the group consisting of aluminum, magnesium, tin, copper, lead, zinc, and alloys containing these as main components, and the volume percentage of alumina-silica fiber is 0.5% or more. The steel constituting the other member has a hardness of HV (10k
It can be seen that it is preferable that the steel has a value of 200 Jy or more, and even 250 Jy.

Although the present invention has been described in detail with reference to several embodiments above, the present invention is not limited to these embodiments, and other embodiments may be made within the scope of the present invention. 11
It will be clear to those skilled in the art that this is the case.

[Brief explanation of drawings]

Figure 1 is an illustration showing the fiber orientation state of a fiber molded product made from alumina-silica fibers containing Musite crystals, and Figure 2 is a diagram showing the fiber orientation state of a fiber molded product made from alumina-silica fibers containing Musite crystals. Figure 3 shows the solidified body formed by high-pressure casting in Figure 2, and Figure 4 shows the mullite crystals in the alumina-silica fibers and the sand and alumina-silica fibers. Figure 5 is a graph showing the relationship between
Figure 6 shows the results of the wear test on composite materials made of copper alloy reinforced with alumina-silica fibers of various volume fractions, with bearing steel as the counterpart 44. Figure 7 shows the results of the wear test conducted on a composite material made of an aluminum alloy reinforced with alumina-silica fibers containing mullite crystals, using parameters such as the hardness of the steel as the mating material. A graph showing the results of the wear test. Figure 8 shows the results of the wear test conducted on a composite material made of a magnesium alloy reinforced with alumina-silica Im, 11 containing mullite crystals and a magnesium alloy using stainless steel as a counterpart material. This is a graph showing. DESCRIPTION OF SYMBOLS 1... Fiber molded object, 1゛... Composite material, 2... Alumina-silica fiber, 3... Mold, 4... Mold cavity eye, 5... Molten metal, 6... Plunger ,7
... Coagulation holding n Applicant Isolai] ... Babcock Fireproofing Co., Ltd. Patent attorney Akashi
Takeshi Masa Figure 1 Figure 37 Figure 2 Figure 4 Mullite crystals in alumina-silica fiber-B (wt%)
Figure 5 Torok 糎＄i 鼾斞 ＄i 鼄 Ka - 田 E Tsubasa Kokita C Kano Rai ＄ E Tsubasa Kokita C Kano Rai ＄ b 口さえ 薖娀 : icO = 田 E 萬萬女 C 迦 # - (self-motivated) Procedural amendment 1985 May 30th [1, Indication of the matter 1985 Patent Application No. 034174 2, Title of the invention Combination of parts 1. Relationship with the person making the amendment '11f1 Appointment of patent applicant Location Houhan, Aichi Prefecture Name of No. 7, Mukoyama, Hagi, G-cho, District
Name: Isolite Pubcock Fireproofing Co., Ltd. 4, Generation 1!
11 people Location: 104 Tokyo Chuo [8 Kirigawa 1-J' 1]
5 JR19S: ♀Agemachi Asaoka Building 3rd floor Telephone 551-4
1716, Subject of amendment Specification 7, ^11 Correct contents

Claims (3)

[Claims] (1) In a combination of a first member and a second member that are in contact with each other and slide relative to each other, the sliding surface portion of the first member relative to at least the second member is 35 to 65 wt%.
Al_2O_3, 65-35wt%SiO_2, 0-1
The composition is 0wt% other components and the amount of mullite crystals is 15
Alumina-silica fibers containing at least 5 wt% of non-fibrous particles with a particle size of 150 μm or more in the aggregate are used as reinforcement materials, and aluminum, magnesium, tin, copper, lead,
It is composed of a composite material in which the matrix is a metal selected from the group consisting of zinc and alloys containing these as main components, and the volume percentage of alumina-silica fiber is 0.5% or more, and the second A combination of members, characterized in that at least a sliding surface portion of the member with respect to the first member is made of steel having a hardness Hv (10 kg) of 200 or more. (2) In the combination of members according to claim 1, the amount of mullite crystals in the alumina-silica fiber is 19 wt%.
A combination of members characterized by the above. (3) In the combination of members according to claim 1 or 2, the content of non-fibrous particles with a particle size of 150μ or more contained in the alumina-silica fiber aggregate is 1 wt% or less. A combination of parts characterized by a certain thing.