JPH10102265A - Wear resistant material and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a wear resistant material in which wear of hard particles is extremely small and furthermore capable of realizing smooth sliding operation. SOLUTION: This material is the one in which many hard particles 3 composed of spherical particles of cobalt radicals harder than aluminum are buried in the inner circumferential face of a pipe shaped body 1 of aluminum easy to be subjected to machining, the gap parts in these hard particles 3 are applied with a lubricant 9 composed of the powder of polyethylene tetrafluoride, the hard particles 3 are composed, for example, by mixing large sized particles 3a with small sized particles 3b, the retio of the large sized particles 3a to the small sized particles 3b is set to >=6/4, furthermore, in the inner circumferential face of the pipe shaped body 1, the hard particles 3 are buried into plural steps to form a layered part whose thickness lies in the range of 10 to 500μm, and the area ratio which is the ratio of the set value of the projected area of the hard particles 3 to the surface area of the inner circumferential face of the pipe shaped body 1 is set to the range of 25 to 80%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a sliding portion such as a bearing member, and is formed by embedding a plurality of hard particles on a surface of a soft and easily processed metal such as aluminum. The present invention relates to a wear material and a method for manufacturing the same.

[0002]

2. Description of the Related Art A technique similar to this kind of wear-resistant material is disclosed in Japanese Patent Application Laid-Open No. 63-16106. This prior art relates to a valve lifter of an engine, and the main body of the valve lifter is made of a soft and easy-to-machine metal, for example, an aluminum alloy, which is relatively soft and easy to machine, and the valve stem abuts against the valve stem. The part is configured as a wear-resistant surface. The wear-resistant surface has an irregular shape including a corner on the surface of the aluminum alloy forming the main body, and has a particle size of 30 to 20.
It is formed by pressing and embedding 0 μm hard particles using a punch.

[0003]

The prior art described above is
Although the main body is made of an aluminum alloy, there is an advantage that weight reduction and wear resistance due to hard particles can be realized at the same time, but it is not used for a sliding portion such as a bearing member as the object of the present invention. Therefore, no consideration is given to the abrasion resistance to linear sliding movement or rotational sliding movement.

That is, in the above-mentioned prior art, since the shape of the hard particles is irregular including a corner, if the hard particles are applied to a portion where a linear sliding motion or a rotary sliding motion is performed, There is a concern that rapid wear may progress from the corner. Therefore, the above-described prior art cannot be applied to a sliding portion as the object of the present invention as it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned situation in the prior art, and a first object of the present invention is to provide a wear-resistant material capable of realizing a smooth sliding operation with very little wear of hard particles. It is to provide materials.

A second object of the present invention is to provide a method for producing a wear-resistant material capable of producing a wear-resistant material in which hard particles composed of spherical particles are embedded in the surface of a soft and easily processed metal. It is in.

[0007]

In order to achieve the first object, the invention according to claim 1 of the present invention is used for a sliding portion, is made of a relatively soft metal material, and is used for machining. A plurality of hard particles harder than the soft / easy-working metal are embedded on the surface of the easy-soft / easy-working metal, and the surface of the soft / easy-working metal in which the hard particles are embedded is used as a wear-resistant surface. In the wear material, the hard particles are formed of spherical particles, and a lubricant is held in a gap formed between the hard particles.

According to the first aspect of the present invention, since the hard particles are composed of spherical particles, when the other moving member forming the sliding portion comes into sliding contact with the hard particles, the spherical sliding member is used. A state similar to a dynamic contact is obtained, whereby a good sliding operation can be performed while minimizing the wear of the hard particles. In addition, since the lubricant is held in the gap between the hard particles, the wear of the hard particles can be suppressed by this lubricant, and a smooth sliding operation can be realized.

In order to achieve the first object, the invention according to claim 2 of the present invention is directed to the invention according to claim 1, wherein the soft and easily workable metal is aluminum, copper, nickel, , And one of the alloys based on any of aluminum, copper and nickel.

[0010] In the invention according to claim 2 configured as described above, in particular, each is made of a relatively soft metal material and is easy to machine, so that it is suitable as a soft and easy-to-work metal in which hard particles are embedded. It's easy to do.

In order to achieve the first object, the invention according to claim 3 of the present invention is directed to the invention according to claim 1 or 2, wherein the hard particles are any one of chromium and cobalt. It is made up of an alloy with this as the base material.

The invention according to claim 3 having such a constitution is particularly suitable as hard particles each having wear resistance, and these are also relatively easily available.

In order to achieve the first object, the invention according to claim 4 of the present invention is directed to the invention according to any one of claims 1 to 3 of the present invention, wherein the sliding portion is moved linearly. , And a moving member that performs at least one of the rotational movements, and a holding member that holds the moving member, wherein a surface of the holding member facing the moving member is a wear-resistant surface containing the hard particles. It is.

According to the fourth aspect of the present invention, when a complicated shape is required as a member for forming the sliding portion, the soft and easily-workable metal portion is processed. The desired shape can be easily obtained.

In order to achieve the first object, the invention according to claim 5 of the present invention relates to the invention according to any one of claims 1 to 4 of the present invention, wherein -A configuration in which the hard particles are formed in a layered portion formed by embedding a plurality of steps in a direction orthogonal to the surface of the easily processed metal.

According to the fifth aspect of the invention, a hard wear-resistant surface can be formed by a plurality of hard particles.

In order to achieve the first object, the invention according to claim 6 of the present invention relates to the invention according to claim 5 of the present invention, wherein the thickness of the layered portion is 10 to 500.
The configuration is set within the range of μm, preferably within the range of 20 to 200 μm.

According to the sixth aspect of the present invention, particularly, the deformation of the soft / easy-working metal due to the embedding of the hard particles is reduced, thereby reducing the residual stress generated in the soft / easy-working metal. In addition, the amount of material required for the soft and easily processed metal can be reduced.

In order to achieve the first object, the invention according to claim 7 of the present invention is directed to the invention according to any one of claims 1 to 6 of the present invention, wherein the hard particles are large-diameter particles. And small diameter particles are mixed, and the ratio of the diameter of the large diameter particles to the diameter of the small diameter particles is set to “6/4” or more.

[0020] In the invention according to claim 7 configured as described above, in particular, the number of large-diameter particles disposed on the surface portion forming the abrasion-resistant surface increases, so that the large-diameter particles mainly slide. 2. The method according to claim 1, wherein the movable member contacts another moving member forming the portion.
It is useful for forming a contact state similar to the spherical sliding contact described in the invention according to the above.

In order to achieve the first object, the invention according to claim 8 of the present invention is directed to the invention according to any one of claims 1 to 7 of the present invention, wherein The area ratio, which is the ratio of the aggregate value of the projected area of the hard particles to the above, is set in the range of 25 to 80%.

According to the eighth aspect of the present invention, particularly, a space for holding the hard particles in the soft / easy-to-work metal part can be reliably secured, whereby the hard particles can be made into the soft / easy-to-work metal. Can be held stably.

In order to achieve the first object, the invention according to claim 9 of the present invention relates to the invention according to any one of claims 1 to 8 of the present invention, wherein the hard particles, The structure has a reactant of the hard particles and the soft and easily processable metal at the boundary with the easily processable metal.

According to the ninth aspect of the present invention, the reactant functions to hold the hard particles on the soft and easy-to-work metal.
It can be stably held by the easily workable metal.

Further, in order to achieve the second object, the invention according to claim 10 of the present invention relates to a method of forming a surface of a soft and easy-to-work metal made of a relatively soft metal material and easy to machine. A method for producing a wear-resistant material, in which a plurality of hard metals composed of spherical particles harder than soft and easily processed metal are embedded, and a lubricant is retained in a gap formed between these hard particles. In the above, the embedding of the hard particles is performed by performing a predetermined softening treatment on the soft and easily processed metal.

A method for producing a wear-resistant material as described above.
In the invention according to No. 0, the embedding of the hard particles is performed by making the soft / easy-working metal softer than at room temperature by the predetermined softening treatment, so that the embedding operation of the hard particles can be reliably performed.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wear-resistant material and a method for manufacturing the same according to the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a side view including a cross section showing a first embodiment of a method for manufacturing a wear-resistant material according to the present invention, and FIG. 2 is obtained by the first embodiment of the manufacturing method shown in FIG. Claims 1, 2, 3, 5, 6, 7, of the wear-resistant material of the present invention.
FIG. 3 is an enlarged sectional view of a main part showing a first embodiment corresponding to FIG. 8, and FIG. 3 corresponds to claim 4 showing a state in which the first embodiment of the wear-resistant material shown in FIG. It is a principal part expanded sectional view.

A first embodiment of the manufacturing method shown in FIG.
For example, a pipe 1 made of aluminum having an outer diameter of 10 mm and a wall thickness of 1 mm is used as a soft / easy-to-work metal made of a relatively soft metal material and easily machined. A rod-shaped core 2 that can be inserted is prepared. Hard particles 3 are fixed to the surface of the core metal 2, that is, the outer peripheral surface. The hard particles 3 are fixed by using a cobalt-based alloy powder made into spherical particles by an atomizing method, for example, an alloy powder of 29% by weight of chromium, 6% by weight of aluminum, 1% by weight of yttrium, the remaining cobalt, and a polyvinyl alcohol aqueous solution. Is applied to the outer peripheral surface of the cored bar 2 by spraying, followed by dehumidification and heat treatment of a decoupling agent.

The core metal 2 to which the hard particles 3 are fixed as described above
Is inserted into the pipe-shaped body 1, the gap between both ends of the pipe-shaped body 1 and the core 2 is sealed by the sealing member 4 so that the hard particles 3 do not scatter outside the pipe-shaped body 1. Sealed. Thereby, the metal core 2, the seal member 4, and the pipe-like body 1 form an integrated structure. In this state, while the pipe-shaped body 1 is softened at a temperature of, for example, 200 ° C., the outer peripheral surface of the pipe-shaped body 1 is hit with a hammer 5 as shown by an arrow 6 as shown in FIG. Forging is performed, and furthermore, the hammer 5 is moved little by little as shown by an arrow 7 and the core 2 is rotated little by little as shown by an arrow 8 to rotate the pipe 1 The process of hitting the entire outer periphery of is performed. As a result, the hard particles 3 fixed to the metal core 2 become
Is transferred to the inner peripheral surface. Here, the sealing member 4 is removed, and the metal core 2 is pulled out of the pipe-like body 1. Finally, a lubricant 9 (shown in FIG. 2) made of polytetrafluoroethylene powder or the like is applied to the gaps between the hard particles 3.

FIG. 2 is an enlarged view of the first embodiment of the wear-resistant material manufactured according to the first embodiment of the above-described manufacturing method. In the direction orthogonal to the surface of the pipe-like body 1, the hard particles 3
Are formed in a layered portion 10 buried in a plurality of stages. The thickness of the layered portion 10 is set to, for example, 20 μm. Hard particles 3 are composed of large-diameter particles 3a and small-diameter particles 3b.
The ratio of these diameters is set to “6/4” or more, for example, the diameter of the large-diameter particles 3a is set to 8 μm,
The diameter of a is set to 5 μm. In addition, pipe-like body 1
The area ratio, which is the ratio of the aggregate value of the projected area of the hard particles 3 to the surface area of the hard particles 3, is set to 80%.

FIG. 3 shows a state in which the first embodiment of the wear-resistant material shown in FIG. 2 described above is applied to a sliding portion, and is made of, for example, a pipe-like body 1 which makes a rotational movement indicated by an arrow 11. The holding member for holding the moving member 12, that is, the bearing member 13 is made of the above-described first embodiment of the wear-resistant material shown in FIG.

In the bearing member 13 shown in FIG. 3, that is, in the first embodiment of the wear-resistant material formed by embedding the hard particles 3 in the inner peripheral surface of the pipe-like body 1, the hard particles 3 are made of spherical particles. Therefore, when the other member forming the sliding portion, that is, the moving member 12 comes into rotational sliding contact with the hard particle 3, the state becomes similar to the spherical sliding contact, thereby reducing the wear of the hard particle 3. Good sliding operation can be performed while keeping it to the minimum. Further, since the lubricant 9 is held in the gap between the hard particles 3, the wear of the hard particles 3 can be suppressed by the lubricant 9 and a smooth sliding operation can be realized. Therefore, excellent durability can be obtained as a sliding member.

In the first embodiment of the wear-resistant material described above, the pipe-like body 1 is made of aluminum. However, since aluminum is a relatively soft metal material and is easily machined, the hard particles 3 are embedded. Soft
It is suitable as an easily workable metal and is easily available. In this respect, it is practical. The hard particles 3 are made of a cobalt group. Cobalt is suitable as the hard particles 3 having wear resistance, and these are also relatively easily available. In this respect, it is practical.

In the case where the first embodiment of the wear-resistant material described above is employed as the holding member forming the sliding portion shown in FIG. 3, ie, the bearing member 13, the pipe-shaped body 1 can be easily cut. Therefore, it is possible to easily cope with a case where the bearing member 13 needs to be formed in a complicated outer shape. Therefore, a large degree of freedom for the outer shape of the bearing member 13 can be secured.

In the first embodiment of the wear-resistant material described above, since the hard particles 3 are formed in the layered portion 10, a robust wear-resistant surface can be formed. From this viewpoint, it contributes to improvement of durability.

Further, since the thickness of the layered portion 10 is set to 20 μm, deformation of the pipe-like body 1 due to the embedding of the hard particles 3 is reduced.
Can be reduced, and the thickness and amount of the material required for the pipe-shaped body 1 can be suppressed. Therefore, stable sliding performance can be ensured and the sliding portion can be made compact, and materials can be saved.

In the above-described first embodiment of the wear-resistant material, the hard particles 3 are made of a mixture of the large-diameter particles 3a and the small-diameter particles 3b. Since the ratio of the large diameter particles 3a to the diameter of the sliding member is set to “6/4” or more, the large diameter particles 3a mainly come into contact with another member forming the sliding portion, for example, the moving member 12 in FIG. This contributes to the formation of a contact state similar to spherical sliding contact, and contributes to the suppression of the wear of the hard particles 3 and the realization of a smooth sliding operation.

In the first embodiment of the wear-resistant material described above, the area ratio of the hard particles 3 is set to 60%, so that the space for holding the hard particles 3 on the surface of the pipe-like body 1 is increased. As a result, the hard particles 3 can be securely embedded in the pipe-shaped body 1 and can be maintained in a stable state, and the hard particles 3 can be prevented from falling off from the pipe-shaped body 1. Therefore, it contributes to the improvement of durability from this viewpoint.

According to the first embodiment of the manufacturing method illustrated in FIG. 1 for manufacturing the above-described first embodiment of the wear-resistant material, the pipe-like body 1 is softened at a temperature of 200 ° C. Since the embedding of the hard particles 3 is performed, the embedding operation of the hard particles 3 can be reliably performed, and a desired wear-resistant material having a wear-resistant surface of the hard particles 3 composed of spherical particles can be obtained. it can. Further, since a wear-resistant surface can be formed on the inner peripheral surface of the pipe-shaped body 1, it is suitable for manufacturing a bearing member.

The present inventors conducted a wear resistance test in the state shown in FIG. 3 in which the first embodiment of the wear resistant material of the present invention was applied to a sliding portion. The test conditions at this time were as follows.
2 and a vibration of 50 Hz was applied. The bearing member 13 to which the first embodiment of the present invention was applied reached a stable temperature state after a temperature rise of several degrees, and was able to repeatedly perform a smooth sliding operation continuously thereafter. This indicates that the first embodiment of the wear-resistant material of the present invention described above can provide stable and smooth sliding performance. For comparison with the above-mentioned wear resistance test, in the state shown in FIG. 3, instead of the bearing member 13, a pipe-shaped body made of aluminum without the hard particles 3 and the lubricant 9 was prepared, and the same as above was prepared. And 50Hz at room temperature
When the vibration was given, it was confirmed that the aluminum was burned to each other within a few minutes, and the sliding operation became impossible.

In the above-described first embodiment of the wear-resistant material and the first embodiment of the manufacturing method, the pipe-like body 1 made of aluminum is mentioned as an example of the soft and easily-workable metal. Instead, an alloy having copper, nickel, or any of aluminum, copper, and nickel as a base material may be used.

Although an alloy using cobalt as a base material has been described as an example of a metal forming the hard particles 3, an alloy using chromium as a base material may be used instead.

In the above description, it has been described in FIG. 3 that the bearing member 13 made of the first embodiment of the wear-resistant material, that is, the moving member 12 held by the holding member performs a rotary motion, but performs a linear motion. It may be one that performs both rotary motion and linear motion.

In the above description, the large particles 3a of the hard particles 3
Is set to 8 μm and the diameter of the small-diameter particles 3b is set to 5 μm. However, the present invention is not limited to this, and may be set within a range of 5 to 50 μm.

In the above description, the thickness of the layered portion 10 of the hard particles 3 on the inner peripheral surface of the pipe-shaped body 1 is set to 20 μm. However, the present invention is not limited to this. Preferably, it may be set within the range of 20 to 200 μm.

Similarly, in the above description, the area ratio, which is the ratio of the set value of the projected area of the hard particles 3 to the surface area of the inner peripheral surface of the pipe-shaped body 1, is set to 60%. However, the present invention is not limited to this. What is necessary is just to set in the range of 25-80%.

In the above description, 200 ° C. is given as an example of the temperature of the softening treatment, but it may be appropriately selected within the range of 200 to 350 ° C. In addition, this softening treatment may be performed in either a vacuum gas atmosphere or an inert gas atmosphere.

FIG. 4 shows a second embodiment corresponding to claim 10 of the method for producing a wear-resistant material of the present invention, and claims 1 and 2 of a wear-resistant material obtained by the second embodiment of this production method. FIG. 10 is a side view including a cross section showing a second embodiment corresponding to FIGS.

In the second embodiment of the manufacturing method shown in FIG. 4, a plate-like member 14 made of aluminum is used as a soft and easily workable metal, and a pair of upper and lower members for rolling the plate-like member 14 are used. Rolling rollers 15, 16
And a roll-in roller 17 capable of rolling-in the above-mentioned rolling roller 15 portion of the powdery spherical particles, for example, the hard particles 3 made of cobalt base.

For example, the plate-like body 14 is heated to 200 ° C., and the hard particles 3 are sprayed on the winding roller 17 while performing the softening treatment. Thereby, the hard particles 3 are dispersed on the upper surface of the plate-like body 14 by the winding roller 17 and the rolling roller 15 which rotate as indicated by arrows 18 and 19, respectively. Further, the plate-like body 14 is pressed by the rotation of the rolling rollers 15 and 16 and is rolled while moving in the direction of the arrow 14a, and at the same time, the hard particles 3 dispersed on the upper surface of the plate-like body 14 described above. It is pushed into the upper surface of the plate-like body 14. That is, the second embodiment of the manufacturing method is to perform warm roll rolling. Thereafter, a predetermined lubricant application process is performed on the gaps between the hard particles 3 embedded in the upper surface of the plate-like body 14.

The second embodiment of the wear-resistant material manufactured in this manner is composed of the plate-like body 14 as described above, and the hard-wearing material 3 includes the hard particles 3 on one surface of the plate-like body 14. It has a configuration having a surface.

The inventors of the present invention set the thickness of the layered portion of the hard particles 3 of the plate 14 to 10 μm, 20 μm, 100 μm,
μm, 300 μm, and over 500 μm were set, and the state of pressure bonding between the plate-like body 14 made of aluminum and the hard particles 3 made of cobalt was observed. Is 10 to 300 μm
In this case, the pressure resistance of the hard particles 3 to the plate-like body 14 was good, and there was no possibility that the hard particles 3 would fall off. When the thickness of the layered portion exceeded 500 μm, poor adhesion was recognized locally, and the hard particles 3 might fall off.

When a tensile test was applied to the boundary between the plate-like body 14 and the hard particles 3 to perform a peeling test of the hard particles 3, the thickness of the layered portion of the hard particles 3 was 10 to 3 mm.
In the case of 00 μm, breakage from the plate-like body 14 was observed due to the good pressure bonding property of the hard particles 3 to the plate-like body 14 as described above. When the thickness was 500 μm, peeling and breakage of part of the layered portion were observed.

From this, the thickness of the layered portion of the hard particles 3 formed on the surface of the plate-like body 14 should be 10 to 500 μm.
If it is set in the range, a stable wear-resistant material that does not cause the hard particles 3 to fall off can be obtained.

In the second embodiment of the manufacturing method configured as described above, the first embodiment of the manufacturing method shown in FIG.
In the same manner as in the embodiment, the softening treatment is performed on the plate-like body 14, so that the embedding operation of the hard particles 3 in the plate-like body 14 can be surely performed. A desired wear-resistant material having a surface can be obtained. Further, since a wear-resistant surface can be formed on the surface of the plate-like body 14, it is suitable for a case where the sliding portions form a linear sliding relationship.

Also, in the second embodiment of the wear-resistant material constructed as described above, similarly to the first embodiment of the wear-resistant material shown in FIG. Since it is made of shaped particles, when another member forming the sliding portion, for example, a moving member (not shown) comes into linear sliding contact with the hard particle 3, it comes into a state similar to spherical sliding contact, whereby the hard particle A good sliding operation can be performed while minimizing the wear of No. 3. Further, since the lubricant is held in the gap between the hard particles 3, the wear of the hard particles 3 can be suppressed by the lubricant 9 and a smooth sliding operation can be realized. Therefore, excellent durability can be obtained as a sliding member.

Since the plate-like body 14 is made of aluminum and the hard particles 3 are made of cobalt,
Each is easily available and practical. In addition, plate-like body 1
Since 4 is made of aluminum, the processing of the outer shape is easy, and a great degree of freedom for this outer shape can be ensured. Further, since the layered portion of the hard particles 3 is formed on the plate-like body 14, a robust wear-resistant surface can be formed, and from this viewpoint, it contributes to improvement of durability. Further, as described above, the layer portion of the hard particles 3 is
When the thickness is set in the range of about 500 μm, there is no possibility that the hard particles 3 fall off from the plate-like body 14, which contributes to the improvement of the durability from this viewpoint.

FIG. 5 is a side view including a cross section showing a third embodiment of the method for producing a wear-resistant material according to the present invention.

In the third embodiment of the manufacturing method shown in FIG. 5, a plurality of, for example, two plate-like bodies 20 and 21 are used as the soft and easily-workable metal. These plate-like bodies 20, 2
1 is, for example, each having a thickness of 2 mm and a width of 25
It is made of aluminum having a length of 0 mm and a length of 450 mm. These plate-like bodies 20 and 21 are arranged parallel to each other with a gap therebetween, and the gap is set to, for example, 1 mm. In the gap, for example, the diameter of the cobalt base is 30.
Hard particles 3 composed of spherical particles of μm are vibration-filled, and both ends of the plate-like bodies 20 and 21 are sealed with a sealing member 22 so that the hard particles 3 do not scatter.

In this state, while the plate-like bodies 20 and 21 are heated at a temperature of, for example, 250 ° C. and subjected to a softening treatment, the hammer press 23 operated at a pressure of, for example, 0.5 t / cm ² causes an arrow. 24, the plate-like body 2
The hard particles 3 are buried in the lower surface of the plate-shaped body 20 and the upper surface of the plate-shaped body 21 by hitting 0 and 21 in directions approaching each other. Here, when the seal member 22 is removed, each of the plate-like bodies 20 and 21 in which the hard particles 3 are embedded can be taken out. Thereafter, a lubricant is applied to the gaps between the hard particles 3 of the plate-like bodies 20 and 21.

With respect to the plate-like bodies 20 and 21 having the hard particles 3 thus formed on the surface, that is, the wear-resistant material,
The present inventors measured the area ratio, which is the ratio of the aggregate value of the projected area of the hard particles 3 to the surface area of each of the plate-like bodies 20 and 21, by image analysis of a scanning electron micrograph of characteristic X-rays. %. Further, the thickness of the layered portion of the hard particles 3 was confirmed by observation of the cross-sectional structure to be 200 μm, and it was confirmed that the hard particles 3 were embedded in multiple stages.

Further, the plate 20 made of aluminum,
When a peeling test was performed by applying a tensile stress to the boundary between the hard particles 3 and the hard particles 3,
The bonding strength to 21 was good, and breakage from plate-like bodies 20 and 21 was observed.

Further, a peeling test was conducted by bending the layered portion 90 ° with the layered portion outside so that the maximum tensile stress was applied to the surface of the layered portion composed of the hard particles 3. It was confirmed that the layered portion was formed soundly.

In the third embodiment of the method for producing a wear-resistant material having the above-described structure, the layered portions of the hard particles 3 composed of spherical particles are formed on the surfaces of the plate-like bodies 20 and 21. In addition to the same operation and effect as the second embodiment of the manufacturing method shown in FIG. 2, the two plate-like bodies 20 and 21 having the wear-resistant surfaces of the hard particles 3 can be manufactured at the same time. Are better.

In the above description, the two plate-shaped members 20 and 21 are arranged and manufactured. However, the number is not limited to this, and three or more plates are manufactured in the same manner as the above-described manufacturing method. It is also possible.

FIG. 6 is a side view including a cross section showing a fourth embodiment of the method for producing a wear-resistant material according to the present invention.

The fourth embodiment shown in FIG.
Pipe-like body 25 made of aluminum as an easily processable metal
In addition, a core metal 26 that can be inserted into the inside of the pipe-like body 25 and working rollers 27 and 28 that perform a drawing process while transferring the pipe-like body 25, that is, a swaging process are prepared. As shown in FIG. 6, the core metal 26 is inserted into the pipe-shaped body 25 and the core metal 2 is inserted.
In a state where the spherical hard particles 3 composed of, for example, cobalt are supplied to the gap between the pipe 6 and the pipe 25, the pipe 25 is heated to, for example, 200 ° C. to perform a softening treatment.

In this state, when the processing roller 27 is rotated in the directions of arrows 29 and 30 and the processing roller 28 is rotated in the directions of arrows 31 and 32, the pipe 25 is rotated in the direction of arrow 33 while being throttled. , Are simultaneously pulled out in the direction of the arrow 34. By this operation, the hard particles 3 are embedded in the inner peripheral surface of the pipe 25. The pipe-like body 25 pulled out in this manner is corrected so as to have a predetermined inner diameter. Then, the hard particles 3 on the inner peripheral surface of the pipe 25
A predetermined lubricant application process is performed on the gap portion.

The thickness of the layered portion of the hard particles 3 on the inner peripheral surface of the pipe 25 manufactured as described above is 40 μm.
m. The present inventors performed a sliding test by inserting a moving member made of an alumina rod into the inside of the pipe-shaped body 25, but the frictional resistance was sufficiently small, and even if the sliding was repeated 10,000 times. No increase in resistance or seizure of the sliding contact portion was observed.

The fourth embodiment of the manufacturing method shown in FIG. 6 also forms a wear-resistant surface on the inner peripheral surface of the pipe 25, and the first embodiment of the manufacturing method shown in FIG. It has almost the same function and effect.

In the above-described first to fourth embodiments of the method for producing a wear-resistant material, any one of a vacuum atmosphere and an inert gas atmosphere may be used between the predetermined softening treatment and the lubricant application treatment. In such an atmosphere, at a predetermined processing temperature higher than the temperature of the softening processing, for example, 500 to 550 ° C.,
The heat treatment may be performed for about 30 minutes. The wear-resistant material manufactured by this manufacturing method corresponds to claim 9.

In the case of producing a wear-resistant material in this manner, a reactant, that is, a compound phase such as Al—Co is formed at the boundary between the soft / easy-to-work metal and the hard particles 3. The material acts as a material for holding the hard particles 3 in the soft / easy-to-work metal, and thereby the hard particles 3 can be held in the soft / easy-to-work metal more stably. To contribute.

[0073]

As described above, according to the first to ninth aspects of the wear-resistant material of the present invention, the hard particles are composed of spherical particles, and the lubricant is held in the gaps between the hard particles. Therefore, the hard particles are hardly abraded and a smooth sliding operation can be realized, which is suitable as a constituent member of the sliding portion and excellent durability can be obtained.

Further, according to the second and third aspects of the present invention, it is suitable as a soft / easy-to-work metal or hard particle, easily obtainable, and practical.

According to the fourth aspect of the present invention, the bearing member is suitable as a bearing member, and can be easily cut, so that a large degree of freedom in the outer shape of the bearing member can be secured.

In particular, according to the fifth aspect of the present invention, a hard wear-resistant surface can be formed by a plurality of stages of hard particles, and from this viewpoint, it contributes to improvement of durability.

According to the invention of claim 6, in particular, the deformation of the soft / easy-to-work metal due to the embedding of the hard particles can be reduced, whereby the residual stress generated in the soft / easy-to-work metal can be reduced. In addition, the thickness and amount of the material required as the soft and easily processed metal can be suppressed. Therefore, stable sliding performance can be ensured and the sliding portion can be made compact, and materials can be saved.

According to the present invention, the large-diameter particles mainly come into contact with other members forming the sliding portion, thereby helping to form a contact state similar to a spherical sliding contact. It contributes to the suppression of wear of hard particles and the realization of smooth sliding operation.

According to the present invention, a space for holding the hard particles can be reliably secured on the surface portion of the soft / easy-working metal. The hard particles can be reliably embedded and maintained in a stable state, and the hard particles can be prevented from falling off from the soft and easily processed metal, thereby contributing to an improvement in durability.

According to the ninth aspect of the present invention, the reactant functions to hold the hard particles on the soft / easy-to-work metal, thereby converting the hard particles into the soft / easy-to-work metal.
It can be held more stably, and contributes to improvement of durability from this viewpoint.

According to the tenth aspect of the method for producing a wear-resistant material of the present invention, it is possible to produce a wear-resistant material in which hard particles composed of spherical particles are embedded in the surface of a soft and easily processed metal. The softening process softens the soft / easy-to-work metal and embeds the hard particles.
The embedding of the hard particles can be easily and reliably performed, and a desired wear-resistant material having a wear-resistant surface containing the hard particles composed of spherical particles and the lubricant can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view including a cross section showing a first embodiment of a method for producing a wear-resistant material of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of the first embodiment of the wear-resistant material of the present invention obtained by the first embodiment of the manufacturing method shown in FIG.

FIG. 3 is an enlarged sectional view of a main part showing a state in which the first embodiment of the wear-resistant material shown in FIG. 2 is applied to a sliding portion.

FIG. 4 is a side view including a cross section showing a second embodiment of the method for producing a wear-resistant material of the present invention, and a second embodiment of the wear-resistant material obtained by the second embodiment of the production method; It is.

FIG. 5 is a side view including a cross section showing a third embodiment of the method for producing a wear-resistant material of the present invention.

FIG. 6 is a side view including a cross section showing a fourth embodiment of the method for producing a wear-resistant material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe-shaped body 2 Core metal 3 Hard particle 3a Large-diameter particle 3b Small-diameter particle 4 Seal member 5 Hammer 9 Lubricant 10 Thickness dimension 12 Moving member (sliding part) 13 Bearing member (sliding part) 14 Plate member 15 Rolling roller 16 Rolling roller 17 Roll-in roller 21 Plate-shaped body 22 Plate-shaped body 23 Hammer-type press 25 Pipe-shaped body 26 Core metal 27 Processing roller 28 Processing roller

Claims (10)

[Claims] 1. A plurality of hard particles, which are used for a sliding portion and are made of a relatively soft metal material and which are easy to machine, are embedded in the surface of a soft / easy-to-work metal. In a wear-resistant material having a surface portion of a soft / easy-to-work metal in which these hard particles are embedded as a wear-resistant surface, the hard particles are composed of spherical particles, and a gap formed between these hard particles is formed. A wear-resistant material characterized by having a lubricant held therein. 2. The soft and easy-to-work metal comprises one of aluminum, copper, nickel, and an alloy having any one of aluminum, copper, and nickel as a base material. The wear-resistant material according to 1. 3. The wear-resistant material according to claim 1, wherein the hard particles are made of an alloy containing any one of chromium and cobalt as a base material. 4. The sliding portion includes a moving member that performs at least one of a linear motion and a rotational motion, and a holding member that holds the moving member, wherein a surface of the holding member that faces the moving member is provided. The wear-resistant material according to any one of claims 1 to 3, wherein the wear-resistant surface includes the hard particles. 5. The wear-resistant surface is formed in a layered portion formed by embedding the hard particles in a plurality of stages in a direction perpendicular to the surface of the soft and easily processed metal. A wear-resistant material according to any one of the above. 6. The thickness of the layered portion is in the range of 10 to 500 μm, preferably 20 to 200 μm.
6. The wear-resistant material according to claim 5, wherein the value is set within a range of m. 7. The hard particles are composed of a mixture of large-diameter particles and small-diameter particles, and the ratio of the diameter of the large-diameter particles to the diameter of the small-diameter particles is “6/4”.
The wear-resistant material according to any one of claims 1 to 6, which is set as described above. 8. An area ratio, which is a ratio of a set value of a projected area of the hard particles to a surface area of the soft and easily processed metal, is set in a range of 25 to 80%. 8. The wear-resistant material according to any one of 7. 9. The method according to claim 1, wherein a reaction product of the hard particles and the soft / easy-to-work metal is provided at a boundary between the hard particles and the soft / easy-to-work metal. A wear-resistant material according to crab. 10. A hard metal made of a relatively soft metal material, and a plurality of hard metals made of spherical particles harder than the soft / easy-working metal are embedded in the surface of the soft / easy-to-work metal which is easy to machine. A method for producing a wear-resistant material in which a lubricant is retained in a gap formed between hard particles of the above-mentioned hard particles. A method for producing a wear-resistant material, which is performed after the application.