JP3442692B2 - Manufacturing method of metal matrix composite - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal-based composite material, and more specifically, to modify a part of a metal material as a composite material with different materials having various characteristics to modify the characteristics of the metal material in the part. Alternatively, the present invention relates to a method for producing a metal-based composite material, which is suitable for forming the entire metal material into a composite material with the different material.

[0002]

2. Description of the Related Art In recent years, aluminum alloys have been widely used from the viewpoint of weight reduction and heat dissipation for automobile parts that are heavily worn such as brake discs, pistons, intake / exhaust valves, rocker arms, valve lifters. It's coming. In such applications, the usual melting process (IM
The aluminum alloy according to the method) is insufficient in wear resistance and heat resistance, and therefore an aluminum-based rapidly solidified alloy material or a composite material using a powder metallurgy method (PM method) is effective.

Aluminum alloy material by the PM method is IM
It is a material having a function that cannot be manufactured by the method, and for example, it contains Si in a finely dispersed state in an amount larger than the solid solution limit to improve wear resistance, or Fe in an amount larger than the solid solution limit. It is a material that can be contained to improve heat resistance. Also, since the raw material is powder, it is possible to mix particles of various different materials or short fibers,
For example, the wear resistance can be greatly improved by containing silicon carbide or alumina. However, these aluminum powder alloys have a drawback that the manufacturing process is more complicated than that of the conventional ingot material, resulting in high cost,
The range of use is limited.

On the other hand, as a surface modification method for hardening only the surface portion of a material requiring wear resistance to improve wear resistance, there is a method of overlaying, spraying or plating by arc melting. In addition, methods such as electrolytic plating, vapor deposition, ion plating, and sputtering have also been performed, but these methods can modify only a very thin surface layer, and are not suitable for automobile parts with severe wear as described above. Difficult to apply. When an attempt is made to form a thick modified layer, heating of the aluminum alloy material causes significant distortion in the build-up and thermal spraying due to arc melting, the alloy material is deformed, and the heat-treated or work-hardened material softens the material. In addition, in the build-up, a casting structure peculiar to melting is formed, blowholes and high temperature cracks occur, and voids are formed in the interior by spraying, and the metal bond with the alloy material is insufficient and the build-up part and alloy material by spraying There arises a problem that peeling is likely to occur at the interface with.

Fric is also a method for surface modification of a metal material in which a metal rod made of a different material is pressed against the metal material and rubbed while rotating.
Known as tion Surfacing. This method is, for example, that when a stainless steel column is rubbed on a mild steel plate while adjusting the rotation speed and the feed rate, a layer of stainless steel is formed on the surface of the mild steel plate. Friction Surfaci on a relatively soft metal surface
In order to form a surface layer by ng, a metal rod close to the same material is easily deformed, the adjustment range of the rotation speed and the feed speed is narrowed, work management becomes difficult, and the part close to the aluminum alloy material surface Since it can only be agitated, the surface layer cannot be made too thick, and it is difficult to apply it to items that are heavily worn, such as automobile parts.

On the other hand, as a butt friction joining method, there is a method in which a soft material is butted against a hard backing material and restrained, and the projection of a hard rotary tool is inserted into the butted portion while being rotated at a high speed and frictionally joined. (Patent No. 271
2838), this method requires less heat input,
It is known that the joint does not melt and the degree of softening and distortion is light.

[0007]

SUMMARY OF THE INVENTION The inventors of the present invention have found that when applying an aluminum powder alloy to an automobile part with severe wear,
As a method of solving the problem of high cost of powder alloy, the powder alloy is placed only in the parts where functions such as wear resistance are required,
In the process of investigating a surface modification method that uses a relatively inexpensive wrought material, the rest is focused on the butt friction welding method described above, and aluminum powder and a different metal powder and ceramic are used for the aluminum base material. Place a powder compact made of powder, insert the protrusions of the hard rotary tool into the base material and powder compact, and rotate, move, and stir according to the butt friction welding method. It has been found that a modified layer is formed by a composite material in which metal particles and ceramic particles are dispersed and which has good wear resistance.

The present invention has been made as a result of further extensive experiments and studies based on the above findings, and an object thereof is to make a part of a metal material different from another material having various characteristics. It is an object of the present invention to provide a method for producing a metal-based composite material, which is suitable for modifying the characteristics of the metal material in that portion as a composite material or for producing a composite material of a metal material and the different material. According to this method, the bonding layer is strong without affecting the metal material serving as the base material, and the modified layer having various characteristics and having a sufficient thickness is provided on a necessary portion of the metal material. It can be easily and inexpensively formed, and the entire metal material can be a composite material having uniform properties.

The method for producing a metal-based composite material according to claim 1 of the present invention for achieving the above object is provided on a metal material.
A dissimilar material is placed in a space, and the metal material and the dissimilar material are rotated and moved by inserting a hard rotary tool having a projection at the tip of a rod-shaped body into the metal material and the dissimilar material to stir the metal material and the dissimilar material. It is characterized in that a part of the metal material is a composite material with a different material.

A method for manufacturing a metal-based composite material according to claim 2 is the method according to claim 1, wherein the space is provided on the surface of the metal material.
It is characterized by being a groove .

In the method for manufacturing a metal-based composite material according to a third aspect , a foreign material is placed on the surface of the metal material, the foreign material is restrained by a jig with respect to the metal material, and the metal material and the foreign material are rod-shaped. When a hard rotary tool with a protrusion on the tip of the main body is inserted, it is rotated and moved along the dissimilar material while removing the jig.
Then, the metal material and the foreign material are stirred, and at least a part of the metal material is made into a composite material with the foreign material.

In the method for manufacturing a metal-based composite material according to a fourth aspect , a metal material and a dissimilar material are arranged in a groove formed by a jig ,
A hard rotary tool having a protrusion at the tip of a rod-shaped body is inserted into the metal material and the different material, and the mixture is rotated and moved to stir the metal material and the different material, and at least a part of the metal material is different material. And a composite material.

In the method for manufacturing a metal-based composite material according to a fifth aspect , a metal material containing a different material is arranged in a groove formed by a jig.
Then, while the hard rotating tool having the projection at the tip of the rod-shaped body is inserted into the metal material and the foreign material, the metal material containing the foreign material is rotated and moved to stir the metal material and at least a part of the metal material. Is a composite material with a different material.

According to a sixth aspect of the present invention, in the method for producing a metal-based composite material according to any one of the first to fifth aspects, the volume of the protrusion is 25 at the tip shoulder portion of the rod-shaped body of the hard rotary tool.
It is characterized in that a recess in the range of up to 150% is provided.

The metal material includes a cast or wrought material of aluminum or aluminum alloy, and the dissimilar material includes a dissimilar metal, a ceramic, an aluminum casting containing more dissimilar metals than the solid solution limit, aluminum or aluminum. Powders or powder compacts composed of alloys and dissimilar metals and / or ceramics, aluminum-based rapidly solidified materials containing dissimilar metals and / or ceramics, and the like are included.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of a composite material showing an embodiment of the present invention before manufacturing, and FIG. 2 is a cross-sectional view of a composite material showing an embodiment of the present invention after manufacturing. 1-2
In the method of manufacturing a composite material according to the present invention, a hard rotary tool 4 having a projection 3 at the tip of a rod-shaped body 1 is used,
Dissimilar material 6 in which the protrusion 3 of the hard rotary tool 4 is arranged in the space 12 formed in the metal material 5 and the groove provided in the metal material 5.
It is inserted into (a modifier of the metal material 5), and in that state, the hard rotary tool 4 is rotated and moved to stir the metal material 5 and the foreign material 6, and at least part of the metal material 5 is different from the metal material 5. A composite material with the material 6 is formed to modify the metal material 5.

That is, in the hard rotary tool 4, the projection 3 of the rod-shaped body 1 is inserted into the metal material 5 and the foreign material 6, and the shoulder 2 at the tip is also partially inserted into the metal material 5 and the foreign material 6. Or, because of frictional contact with the metal material 5 and the dissimilar material 6,
The shoulder 2 and the projection 3 at the tip end are required to be harder than the metal material 5 and its modifying material 6. The shape of the protrusion 3 is not particularly limited, but the relationship between the shoulder 2 at the tip and the protrusion 3 is 25 to 150% of the volume of the protrusion 3 at the shoulder 2 at the tip.
It is preferable to provide the recesses 10 in the range of, preferably in the range of 30 to 120%, more preferably in the range of 40 to 100%.

If the volume of the recess 10 of the shoulder portion 2 is less than 25% of the volume of the protrusion 3, burrs 7 are often generated in the composite material (reforming layer) 11 formed by the passage of the protrusion 3 and the recess 10 has a large volume. When the volume exceeds 150% of the volume of the protrusions 3, the modified layer 11
In some cases, the metal material 5 and the modifying material 6 are not filled inside and a cavity is formed. The shape of the depression 10 is not particularly limited, but the shape of the depression 10 is selected together with the shape of the projection 3 in accordance with the material of the metal material 5 and the foreign material 6, the disposition state of the foreign material 6, and the like. It

The material of the metal material 5 is not particularly limited, but a wrought material or casting of relatively soft aluminum or aluminum alloy is preferably used. The material of the dissimilar material 6 is not particularly limited either, but in order to form a composite material with the metal material 5 and give desired characteristics, when the metal material 5 is the above-mentioned soft material, the dissimilar metal is solid-solution limited. Aluminum casting, which contains more
Powder compact consisting of aluminum or aluminum alloy and dissimilar metal and / or ceramic, or dissimilar metal and / or
Alternatively, an aluminum-based rapidly solidified material containing ceramic is preferably used.

As described above, the protrusion 3 of the hard rotary tool 4 is inserted into the metal material 5 and the foreign material 6, and in that state, the hard rotary tool 4 is rotated and moved along the modifying material 6, so that the metal material 5
By stirring the foreign material 6 and the different material 6, as shown in FIG. 2, a composite material (modified layer) 11 is formed on a part of the metal material 5. In this case, by increasing the length of the protrusions 3 and stirring the entire metal material 5 evenly, the entire metal material 5 can be made into the composite material 11. The composite material 11 formed as the modified layer exhibits a structure morphology in which the foreign material 6 is dispersed in the metal material 5 without affecting the metal material 5 as the base material, and a strong bond with the metal material 5 is obtained. To be For example, when SiC powder is arranged as the different material 6 on the metal material 5, the composite material 11 having excellent wear resistance and heat resistance can be formed as the modified layer.

In order to accurately stir the metal material 5 and the dissimilar material 6, it is preferable that the both are restrained by some method. In the example of FIG. 1, the metal material 5 is provided with a groove-shaped space 12,
A dissimilar material 6 serving as a modifying material of the metal material 5 is fitted into the space 12 and is in a restrained state. 3 to 6 show another example in which the dissimilar material 6 is placed on the metal material 5 in a restrained state.
3 and 4, a deep groove 13 is provided in the metal material 5, the deep groove 13 is filled with a powdery dissimilar material material 14, and the projection 3 of the hard rotary tool 4 is inserted and stirred to generate a composite material 15. It is a thing. In FIG. 5, a ring-shaped groove 17 is provided on the disk surface of the disk-shaped metal material 16, the powder-like foreign material 14 is filled in the ring-shaped groove 17, and the protrusion of the hard rotary tool 4 is inserted and stirred to form a ring shape. A modified layer composed of the composite material 18 is generated, and the central portion of the disk-shaped metal material 16 is further hollowed out to obtain the final product A. 6, assuming a piston, a ring-shaped groove 20 is provided on the peripheral surface of a cylindrical metal material 19, a rod-shaped foreign material 21 is fitted into the ring-shaped groove 20, and the projection 3 of the hard rotary tool 4 is inserted. The modified layer made of the ring-shaped composite material 22 is generated by stirring.

7 to 10 show an example in which the foreign material 6 is restrained on the surface 30 of the metal material 5 by means of a jig. That is, a solid foreign material 31 is placed on the surface 30 of the metal material 5 on which a modified layer having desired characteristics is to be formed (see FIG. 7).
(See FIG. 8), the dissimilar material 31 is restrained by means of jigs 32 and 33 (see FIGS. 8 and 9), and the hard rotary tool 4 is rotated with the protrusion 3 of the hard rotary tool 4 inserted, and the hard rotary tool is rotated. The protrusion 4 is moved along the dissimilar material 31 while removing the jigs 32 and 33 and stirred to generate a composite material 34 as shown in FIG. Note that FIG. 8 shows that the modifying material 31 is restrained on the surface 30 of the metal material 5 by the claw-shaped jig 32, and FIG. 9 shows the surface 30 of the metal material 5 by the roller-shaped jig 33. The modifying material 31 is restrained. In any case, it is in a restrained state in front of the hard rotary tool 4,
Immediately before the hard rotary tool 4 moves, the restraint state by the jigs 32 and 33 is released.

11 to 18 show an example in which the metal material 5 and the dissimilar material 6 are arranged in a groove formed by a jig and brought into a restrained state. That is, in FIGS. 11 and 12, a round rod-shaped metal material 42 is fitted into a groove 41 formed by combining split mold jigs 40, and the groove 41 in the gap is filled with a powdery foreign material 14. Then, the roller-shaped compaction machine 43 is run from above, and then the protrusion 3 of the hard rotary tool 4 is inserted to rotate the hard rotary tool 4 to rotate the foreign material 14 and the metal material 4.
As shown in FIG. 12, the metal material 42 as a whole is converted into the composite material 44 by agitating 2.

In FIGS. 1 to 12, a hard rotary tool having a protrusion at the tip of a rod-shaped body is used for a metal material in which a dissimilar material separate from the metal material is arranged. The method of rotating and moving the metal material and the different material in a state of being inserted into the different material to stir the metal material and the different material to form at least a part of the metal material into a composite material with the different material has been described. A metal material containing, for example, a powder or a powder compact made of a different material from the metal material, or a metal material containing a different metal as an alloy component, for example, a cast material of a metal material containing a different metal as an alloy component, A hard rotary tool with a protrusion at the tip of the main body is rotated and moved with the protrusion inserted in a metal material to stir the metal material, and at least part of the metal material is a different material or a composite material with a different metal. You can also say

13 and 14 show a metal material containing a different material,
An example of using a metal material containing dissimilar metals as an alloy component is shown. As an example, a molten metal rolled material containing more dissimilar metals than the solid solution limit in a groove 46 formed by combining split mold jigs 45. For example, a casting material 47 of a metal material containing a dissimilar metal as an alloy component is fitted, the protrusion 3 of the hard rotary tool 4 is inserted, and in that state, the hard rotary tool 4 is rotated and moved and stirred, and it is stirred two or three times. By repeatedly agitating the metal material 47 evenly, a composite material is generated, and the split mold jig 45 is used.
Is opened to take out the metal material 47 converted into the composite material, and is passed between rolling rollers 48 to manufacture a rolled material 49 of the composite material which is a modified material of the metal material 47.

In FIGS. 15 and 16, a deep groove 52 is formed in the groove 51 of the roll type jig 50, and a rectangular rod-shaped metal material 54 in which a plate-shaped dissimilar material 53 is fitted is fitted into the deep groove 52. While the roller-shaped restraint jig 55 is restrained in advance, the protrusion 3 of the hard rotary tool 4 is inserted immediately after that, the hard rotary tool 4 is rotated in that state, and the roll-type jig 50 is rotated. The metal material 54 is reformed by stirring the metal material 54 while moving the material 54.
The composite bar material 56, which is a modified metal material, out of the range
Is generated.

FIG. 17 and FIG. 18 show, for example, in a groove 62 of a twin-roll type jig 61 with a round groove having a gap 60 at the top,
A casting rod 63 of a metal material containing a dissimilar metal as an alloy component is fitted, and the projection 3 of the hard rotary tool 4 is inserted into the casting rod 63,
In that state, the hard rotating tool 4 is rotated, and the casting rod 63 is agitated while moving the casting rod 63 by rotating the twin-roll type jig 61 with a round groove. A composite wire rod 64, which is a reformed casting rod 63, is generated at a place where it is removed, and this is further scraped by a scraper 65 to obtain a final product such as a trolley wire.

Next, examples for confirming the effects of the present invention will be described. It should be noted that these examples show examples of the embodiments of the present invention, and the present invention is not limited to these examples.

Example 1 A groove having a width of 4 mm and a depth of 4 mm was formed on the surface of an aluminum alloy extruded material (material: 1100) having a thickness of 10 mm, a width of 150 mm and a length of 500 mm, and an average particle diameter of 100 μm. 4 mm square bar powder obtained by CIP-compacting a mixed powder obtained by mixing Si particles having an average particle diameter of 2 μm at a content ratio of 30% by weight with 100 MPa of pressure and solidifying and molding (bulk density 80%). The molded body was fitted with a roll and constrained on the jig.
On the other hand, a protrusion (tip diameter:
7 mm, length: 5 mm) hard rotating tool (shoulder diameter of tip: 25 mm, shoulder recessed volume of tip: volume of protrusion 80)
%) Is rotated and horizontally moved (rotation speed is 1000 rpm, moving speed is 200 mm / min) while the projections are inserted into the extruded material and the powder compact, and the extruded material and the powder compact are agitated. A composite material formed in part. In the obtained composite material, a Si diffusion portion having a width of 25 mm was formed on the surface, and the stirring portion, that is, Si in the modified layer was dispersed with an average particle diameter of 1 μm, and the concentration was 16% on average. 1 and 2).

Example 2 On the surface of an aluminum alloy plate (material: 3003) having a thickness of 10 mm, a width of 150 mm and a length of 500 mm, a width of 10 mm and a height of 1
An Al-30% Si casting plate of mm was fixed by the method shown in FIG. 9 and restrained on the jig. On the other hand, a hard rotary tool with a rod-shaped body provided with protrusions (tip diameter: 5 mm, length 3 mm) (tip shoulder diameter: 20 mm, tip shoulder recessed volume: 135 of protrusion volume) %) With the protrusion inserted into the casting material and alloy plate (rotation speed: 800 rp)
m) and move horizontally with the forward tilt angle set to 5 degrees (moving speed: 1
As a result of stirring the casting material and the alloy plate at 50 mm / min), a composite material was formed on a part of the alloy plate. On the surface of the obtained composite material, a defect-free Si diffusion portion having a width of 20 mm was formed, and the stirring portion, that is, Si in the modified layer had an average particle diameter of 1 μm.
The average concentration was 22% (see FIGS. 7 and 9 to 10).

Example 3 2 mm wide and 4 mm deep on the surface of an aluminum alloy plate (material: 5052) having a thickness of 10 mm, a width of 150 mm and a length of 500 mm.
Groove is formed, and pure Al having an average grain size of 100 μm is formed in this groove.
The powder was filled with a mixed powder obtained by mixing SiC powder having an average particle size of 5 μm at a content rate of 5% by weight and restrained on a jig. On the other hand, a hard rotating tool with a protrusion (tip diameter: 5 mm, length: 5 mm) at the tip of the rod-shaped body (shoulder diameter of the tip: 20 mm, shoulder recessed volume of the tip: volume of the protrusion 5
0%) was rotated and horizontally moved (rotation speed: 2000 rpm, moving speed: 100 mm / min) while the projections were inserted into the mixed powder and the alloy plate, and the mixed powder and the alloy plate were stirred, and as a result, A composite material was formed in part. In the obtained composite material, a SiC diffusion portion having a width of 20 mm is formed on the surface, and the stirring portion, that is, the SiC in the modified layer has an average particle diameter of 5 μm.
It was uniformly dispersed by m (see FIGS. 3 and 4).

Example 4 Assuming a brake disc, surface modification was attempted on a side surface (corresponding to a friction surface) slightly inside from the outer peripheral surface of the disk-shaped member. Aluminum alloy (material: 6063) as a disk-shaped member
A billet (diameter: 150 mm) sliced to a thickness of 12 mm was prepared, and a ring-shaped groove having a width of 3 mm and a depth of 4 mm was formed at a position of 110 mm in diameter, and the ring-shaped groove had an average particle diameter of 5 μm. The powder was filled and restrained on the jig. On the other hand, a hard rotating tool with a protrusion (tip diameter: 9 mm, length: 5 mm) at the tip of the rod-shaped body (tip shoulder diameter: 40 mm, tip shoulder recessed volume: protrusion volume 3
0%), with the protrusions inserted into the aluminum powder and the disk-shaped member, rotate and move horizontally (rotation speed: 800 rp)
As a result of stirring the aluminum powder and the disk-shaped member at m 2, the moving speed: 100 mm / min), a composite material was formed in the ring-shaped groove and its peripheral portion. The resulting composite material contains
An alumina diffusing part is formed with a width of 40 mm on the surface, and the stirring part, that is, the alumina in the ring-shaped reforming layer has an average particle size of 5
It was evenly dispersed in a size of μm. The stirring is started from the center of the disc-shaped member in the circumferential direction, and the starting portion is 30 mm.
After wrapping, it was moved to the center and the rotary tool was pulled out. After that, the central portion of the disk-shaped member was cut and removed with a diameter of 50 mm, and the front surface and the back surface were each cut by 1 mm (see FIG. 5).

Example 5 Assuming a piston, an attempt was made to modify the surface of the outer peripheral surface (corresponding to a friction surface) slightly inside from the axial end of the cylindrical member. As a cylindrical member, an extruded material (outer diameter: 80 mm, length: 80 mm) of aluminum alloy (material: 6063) is prepared, and the extruded material has a width of 4 mm and a depth of 4 mm at a position 40 mm from the end in the length direction.
Was formed into a ring-shaped groove, and an Al-30% Si casting rod having a width of 4 mm and a height of 4 mm was fitted and restrained in the ring-shaped groove. On the other hand, a protrusion (tip diameter: 5 mm, at the tip of the rod-shaped body,
Hard rotating tool (length: 5 mm) (shoulder diameter of tip: 1
5 mm, volume of shoulder depression at the tip: 50% of the volume of the protrusion), rotate with the protrusion inserted into the casting rod and extruded material, move horizontally (rotation speed: 1000 rpm, moving speed 200 mm /
As a result, the casting rod and the extruded material were stirred, and as a result, a composite material was formed in the ring-shaped groove and its peripheral portion. On the surface of the obtained composite material, a defect-free Si diffusion portion having a width of 20 mm was formed, and the stirring portion, that is, S of the ring-shaped reforming layer was formed.
i was dispersed with an average particle size of 1 μm, and the concentration was 22% on average (see FIG. 6).

Comparative Example 1 A composite material was obtained under exactly the same conditions as in Example 1 except that the volume of the hollow portion at the tip of the hard rotary tool was set to 160% of the volume of the protrusions. This composite has 25mm on its surface
Although the Si diffusion portion was formed with a width, a tunnel-shaped defect was generated inside the diffusion portion in the direction in which the hard rotary tool moved.

Comparative Example 2 A composite material was obtained under exactly the same conditions as in Example 1 except that the volume of the hollow of the tip of the hard rotary tool was 20% of the volume of the protrusions. This composite material had a 25 mm-wide Si diffusion portion formed on its surface, but had many burrs, and a tunnel-like defect was generated in the stirring portion, that is, in the modified layer in the direction in which the hard rotary tool moved.

Example 6 A pure aluminum rod having an outer diameter of 16 mm and a length of 600 mm was prepared as shown in FIG.
As shown in 1, insert into a split jig and pour SiC powder having an average particle diameter of 5 μm so that the mixing amount with respect to the aluminum rod is 10%, and sufficiently fill the split jig. As shown in Fig. 12, a hard rotary tool (shoulder at the tip of the rod-shaped body is provided with protrusions (tip diameter: 10 mm, length: 8 mm) while pressing it while rolling it with a roller-shaped compactor. Part diameter: 14 mm, tip shoulder depression volume: 40% of the volume of the protrusion), the protrusion is an aluminum rod and Si
Rotate and move horizontally while inserting into C powder (rotation speed 25
As a result of stirring the aluminum rod and the SiC powder at 00 rpm and a moving speed of 700 mm / min, all the pure aluminum rod was converted into a composite material. The obtained composite wire has SiC
Were uniformly dispersed at an average particle size of 5 μm and a concentration of 9.5% (see FIGS. 11 and 12).

Example 7 A molten metal rolled material of Al-30% Si alloy having a thickness of 6 mm and a width of 60 mm was inserted and restrained in a split mold jig as shown in FIG. Diameter: 5mm, Length: 5m
m) equipped with a hard rotary tool (shoulder diameter of the tip: 25 mm, shoulder recessed volume of the tip: 30% of the volume of the protrusion), rotate and move with the protrusion inserted into the molten metal rolling material (rotation speed) :
The melt-rolled material was converted into a composite material by stirring the melt-rolled material at 2500 rpm and a moving speed of 300 mm / min in three movements in the width direction so as to cover the plate surface.
The produced composite material was taken out from the split mold jig and, as shown in FIG. 14, rolled with a rolling roll to a thickness of 6 mm to 2 mm. The result of rolling was good, and when the obtained rolled composite material was observed with an optical microscope, it showed a structure in which Si particles were uniformly dispersed at 0.1 to 2 μm in an aluminum matrix (see FIGS. 13 and 14).

Example 8 An aluminum alloy (8 mm square groove was formed in a roll type jig having a diameter of 500 mm as shown in FIGS. 15 to 16 and a steel plate having a width of 1 mm and a depth of 4 mm was inserted in the groove ( Material: 300
(3 alloy) extruded shape material is inserted together with the steel plate, and a hard rotary tool (tip shoulder diameter: 8 mm, tip shoulder) with a rod-shaped body provided with protrusions (tip diameter: 7 mm, length: 7 mm) Part hollow volume: 50% of the volume of the protrusion) is rotated while the protrusion is inserted in the steel plate and the extruded profile, and is moved together with the roll jig (rotation speed: 1000 rpm, moving speed 100 mm / min) As a result of stirring the extruded profile, a square rod-shaped composite material was obtained. In the obtained composite material, Fe was uniformly dispersed in the matrix at an average concentration of 8% (FIGS. 15 and 1).
6).

Example 9 Assuming a trolley wire that receives a large amount of friction, see FIG.
A cast rod of Al-30% Si alloy having a diameter of 15 mm was fitted into the circular groove of a twin-roll type jig with a circular groove having an upper gap as shown in FIG. :
13 mm, length: 13 mm) hard rotating tool (shoulder diameter of tip: 10 mm, shoulder recessed volume of tip: volume of protrusion 2)
5%) is rotated (rotation speed: 2000 rpm) with the projection inserted in the casting rod, and the casting rod is moved by rotating the twin-roll type jig with round groove (moving speed 600 mm).
/ Min), and as a result of stirring the casting rod, the casting rod was converted into a composite material. The bead of the obtained composite material was removed with a scraper to obtain a composite wire. The upper part and the inner part of the composite wire rod were sufficiently agitated, and porosity and shrinkage cavities did not occur, and had a smooth surface. When observing the internal tissue,
A structure in which Si was uniformly dispersed with an average particle size of 1 μm was observed (see FIGS. 17 and 18).

Example 10 An oxygen-free copper rod having an outer diameter of 20 mm and a length of 1100 mm was fitted into a split mold jig as shown in FIG.
12 μm tungsten particles were charged so that the mixing amount with respect to the oxygen-free copper rod material was 30% by volume, and as shown in FIG. 12, while rolling with a roller-shaped compacting machine so as to sufficiently fill the split mold jig. Hard rotating tool with a protrusion (tip diameter: 10 mm, length: 8 mm) on the tip of the rod-shaped body (shoulder diameter of tip: 14 mm, recessed shoulder tip volume: 30% of protrusion volume) With the protrusion inserted into the oxygen-free copper rod and tungsten particles, move horizontally (rotation speed: 1
As a result of 500 rpm and a moving speed of 200 mm / min), the oxygen-free copper rod was converted into a composite material. The obtained composite wire showed an internal structure in which tungsten particles were uniformly dispersed at a concentration of% (see FIGS. 11 and 12).

Although the embodiment of the present invention has been described above, the specific configuration is not limited to this, and modifications and additions within the scope of the present invention are within the scope of the present invention.

[0042]

As described above, according to the present invention, a dissimilar material can be dispersed in a metal material and a strong bond with the metal material can be obtained without affecting the metal material as a base material. A modified layer made of a composite material in which different materials are dispersed can be arbitrarily set in the metal material by quantitatively adjusting the different materials. Therefore, it is possible to easily and inexpensively obtain materials having various characteristics according to the types of different materials. In addition, it is possible to convert a part or all of the metal material into a composite material by changing the agitation shape such as the agitation depth and the agitation position by the hard rotary tool.

According to the second to fifth aspects of the invention, since the protrusion of the hard rotary tool is inserted into the foreign material which is restrained with respect to the metal material, and the foreign material is stirred together with the metal material by rotating and moving, the metal material is stirred. A modified layer of composite material can be created at desired locations on the material. By changing the way of arranging the metal material and the dissimilar material in the groove of the jig and the agitation mode, all or part of the metal material can be arbitrarily converted into the composite material.

According to the invention of claim 6, in any one of claims 1 to 5, the tip of the rod-shaped main body of the hard rotary tool is
By providing the depressions in the range of 25 to 150% of the volume of the protrusions, the occurrence of burrs in the reformed layer formed after passing through the protrusions is reduced, and the composite material is not filled in the reformed layers to form cavities. .

[0045]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state before manufacturing a composite material showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state after manufacturing the composite material showing the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state before production of another composite material according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state after manufacturing of another composite material according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a manufacturing state of another composite material according to the embodiment of the present invention.

FIG. 6 is a perspective view showing a manufacturing state of another composite material according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a state before manufacturing a composite material according to another embodiment of the present invention.

FIG. 8 is a perspective view showing a restrained state of the metal material in FIG.

9 is a perspective view showing another constrained state of the metal material in FIG. 7. FIG.

FIG. 10 is a cross-sectional view showing a state after manufacturing a composite material according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a state before manufacturing a composite material according to another embodiment of the present invention.

FIG. 12 is a perspective view showing a manufacturing state of a composite material according to another embodiment of the present invention.

FIG. 13 is a perspective view showing a manufacturing state of a composite material according to another embodiment of the present invention.

FIG. 14 is a perspective view showing a state after manufacturing a composite material according to another embodiment of the present invention.

FIG. 15 is a cross-sectional view showing a state before manufacturing a composite material according to another embodiment of the present invention.

FIG. 16 is a perspective view showing a manufacturing state of a composite material according to another embodiment of the present invention.

FIG. 17 is a cross-sectional view showing a state before manufacturing a composite material according to another embodiment of the present invention.

FIG. 18 is a perspective view showing a manufacturing state of a composite material according to another embodiment of the present invention.

[Explanation of symbols]

1 Rod-shaped body 2 shoulder 3 protrusions 4 Hard rotating tool 5, 16, 19, 42, 47, 54 Metal material 6, 14, 21, 31, 53 Dissimilar materials 7 Bali 10 depressions 11, 15, 34 Composite materials (modified layer) 12 spaces 13,52 deep groove 17,20 Ring groove 18,22 Ring-shaped composite material 30 surface 32, 33 jig 40, 45 split jig 41, 46, 51, 62 Grooves 43 Roll compactor 44, 64 composite wire 48 rolling rolls 49 Composite rolled material 50 roll type jig 55 Roll-up restraint jig 56 composite square bar 60 Upper clearance 61 Twin Roll Jig with Round Groove 63 casting rod

Continuation of front page (51) Int.Cl. ⁷ Identification code FI B23K 103: 18 B23K 103: 18

Claims (6)

(57) [Claims] 1. A dissimilar material is arranged in a space provided in a metal material.
In a restrained state, the metal material and the foreign material are rotated and moved by inserting a hard rotary tool having a projection at the tip of a rod-shaped body into the metal material and the foreign material to stir the metal material and the foreign material, and at least one metal material A method for producing a metal-based composite material, wherein the part is a composite material with a different material. 2. The groove is a groove provided on the surface of a metal material.
Method for producing a metal matrix composite material according to claim 1, wherein the that. 3. A hard rotation wherein a dissimilar material is placed on the surface of a metal material, the dissimilar material is restrained with respect to the metal material by a jig, and a protrusion is provided at the tip of a rod-shaped body on the metal material and the dissimilar material. Rotate with the tool inserted, and remove the jig along the dissimilar material.
A method for producing a metal-based composite material, characterized in that the metal material and the foreign material are moved while stirring to stir the metal material and at least part of the metal material to form a composite material with the foreign material. 4. A metal material and a different material in a groove formed by a jig.
And a hard rotating tool having a protrusion at the tip of a rod-shaped body is inserted into the metal material and the foreign material, and is rotated and moved to stir the metal material and the foreign material, and at least one metal material A method for producing a metal-based composite material, wherein the part is a composite material with a different material. 5. Gold containing foreign material in a groove formed by a jig
A metal material is placed , and a hard rotary tool having a rod-shaped body provided with a protrusion at its tip is inserted into the metal material and the foreign material, and is rotated and moved to stir the metal material containing the foreign material, and at least the metal A method for producing a metal-based composite material, wherein a part of the material is a composite material with a different material. 6. The rod-shaped main body of the hard rotary tool is provided with a recess in the tip shoulder portion in a range of 25 to 150% of the volume of the protrusion. Of the metal-based composite material of.