JP2001234806A - Cast-in method and cast-in product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cast-in method and a cast-in product in which an intermediate layer is formed of only one film, and the adhesivity of the cast-in product such as a cylinder liner to a casting can be improved. SOLUTION: The cylinder liner 8 formed of aluminum powder alloy has an outer circumferential surface 8a of the surface roughness of 1-5 μm Rz, and a film 16 formed of 100% Sn having the melting point below that of an aluminum alloy cylinder block 4 is formed on the outer circumferential surface 8a. When this film 16 is formed on the cylinder liner 8, the film melted by the heat of the molten metal is melted with the molten metal during the cast-in. Thus, a highly adhesive layer is formed on the surface of the cylinder liner 8, and the adhesive strength of the cylinder block 4 to the cylinder liner 8 becomes sufficiently high. The above problems can thus be solved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a product for assembling a to-be-inserted part such as a cylinder liner of an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, in a sleeve type cylinder block formed by casting a separately formed cylinder liner with a metal material, it is necessary to firmly adhere the cylinder liner to a casting. . For example, F
2. Description of the Related Art There is known a technique of forming a sprayed coating of a Ni-based material such as Ni or a Ni alloy on a cylinder liner made of an e-based material, and casting a coating portion of the cylinder liner with an Al alloy to form a cylinder block. (Japanese Unexamined Patent Application Publication No.
-305420).

[0003] This technique contributes to reducing the variation in shear strength between the cylinder liner and the casting by preventing gas defects between the cylinder liner and the casting made of an Al alloy.

[0004]

However, the shear strength between the cylinder liner and the Al alloy casting according to the prior art described above is 29.4-39.2 MPa, and the adhesion is improved. I can't say that.

As another conventional example, a lower layer of Ni-Al is provided on the surface of a cylinder sleeve (cylinder liner) made of an iron-based material, and an upper layer of Al is provided thereon, and this cylinder liner is made of an Al alloy. A casting technique has been proposed (Japanese Patent No. 2858208).

However, since two layers must be formed on the surface of the cylinder liner as described above, there is a possibility that the number of manufacturing steps is increased and the manufacturing cost is increased. It is not clear to what extent the adhesion has been improved.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and a product which can improve the adhesion between a casting object and a casting such as a cylinder liner. It is.

[0008]

The means for achieving the above object and the effects thereof will be described below. The stuffing method according to claim 1 is a stuffing method for producing a stuffed product by stuffing a part to be stuffed with molten metal, which is different from a metal material constituting the part to be stuffed. For the cast-in to-be-molded part having a coating made of a metal material and having a melting point equal to or lower than the melting point of the molten metal formed on the surface, the coating portion is molded with the molten metal. I do.

As described above, a film is formed on the surface of the part to be stuffed with a metal material different from the part to be stuffed and having a melting point equal to or lower than the melting point of the molten metal.

[0010] When a film is formed on a part to be filled, the layer having a higher degree of adhesion can be formed by a layer having a higher degree of adhesion than by directly pouring a molten metal onto the part to be filled. It is thought to be formed on the surface. The coating is made of a metal material having a melting point lower than the melting point of the molten metal to be cast. For this reason, when the molten metal is poured onto the cast-in target part on which the coating is formed, the coating melted by the heat of the molten metal and the molten metal fuse with each other,
It is considered that the interface between the film and the casting is in a strong bonding state.

Therefore, the part to be cast and the casting are firmly joined to each other through the film. Thus, even if the intermediate layer is a single film, the adhesion between the part to be cast and the casting can be improved.

The coating may be the same metal material as the molten metal. Even for the same metal material, since it is first formed as a film on the part to be cast,
It is considered that a layer having higher adhesiveness is formed than when directly casting. Then, since the same metal material comes into contact with the molten metal from above, the film surface and the molten metal are sufficiently melted to achieve a strong joint.

[0013] The method of assembling according to claim 2 is as defined in claim 1.
In the insert molding method described above, the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is a Sn-based material, a Bi-based material, a Zn-based material, a Mg-based material, and an Al-based material. The molten metal is made of at least one of an Al-based material, and the molten metal is an Al-based material.

As a specific example, the part to be cast-in is F
It is made of an Fe-based material that is e or an Fe alloy or an Al-based material that is Al or an Al alloy. The metal material forming the film is Sn or Sn alloy, which is Sn.
Material, Bi material that is Bi or Bi alloy, Zn
Alternatively, a Zn-based material such as a Zn alloy, Mg or Mg
It is made of at least one of an Mg-based material that is an alloy and Al-based material that is Al or an Al alloy. And
The molten metal is an Al-based material that is Al or an Al alloy.

In this case, the melting point is as follows: molten metal (Al-based material) ≧ film (Sn-based material, Bi-based material, Zn-based material, M
g-based material, Al-based material). By combining the metal material between the film and the casting in this way, the part to be cast and the casting are firmly joined via the film,
Even if the intermediate layer is a single layer, it is possible to improve the adhesion between the part to be stuffed and the casting.

[0016] The method of assembling according to claim 3 is as follows.
In the insert molding method described above, the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is selected from Sn-based materials, Bi-based materials, Zn-based materials, and Mg-based materials. Wherein the molten metal is a Mg-based material.

As another specific example, the part to be cast-in is made of an Fe-based material that is Fe or an Fe alloy or made of Al.
Alternatively, it is made of an Al-based material that is an Al alloy. And
The metal material forming the film is a Sn-based material that is Sn or a Sn alloy, a Bi-based material that is Bi or a Bi alloy,
It is made of at least one of Zn-based material which is Zn or Zn alloy and Mg-based material which is Mg or Mg alloy. The molten metal is a Mg-based material such as Mg or a Mg alloy.

The melting point in this case is: molten metal (Mg-based material) ≧ film (Sn-based material, Bi-based material, Zn-based material, M
g-based material). By combining metal materials in this way, the part to be cast and the casting are firmly joined via the coating, and the adhesion between the part to be cast and the casting is improved even if the intermediate layer is one layer. Can be.

[0019] The insert-molding method according to claim 4 is a insert-molding method for producing an insert-molded product by molding an insert-molded part with molten metal, wherein the metal material constituting the insert-molded part is provided. A different metal material and a coating made of a metal material having a melting point lower than the melting point of the molten metal for the part to be stuffed formed on the surface,
It is characterized in that the film portion is cast with the molten metal.

As described above, a film is formed on the surface of the as-cast part by using a metal material different from that of the as-cast part and having a melting point lower than the melting point of the molten metal. Unlike the first aspect, the coating is a metal material having a melting point lower than the melting point of the molten metal. By setting in this way, when the molten metal is poured onto the cast-in target part on which the coating is formed, the molten metal and the coating are melted well, and the interface between the coating and the casting is firmly joined. It is thought that.

Therefore, the part to be cast and the casting are sufficiently firmly joined to each other through the film. Thus, even if the intermediate layer is a single layer, the adhesion between the part to be stuffed and the casting can be improved.

The method according to the fifth aspect of the present invention is directed to the fourth aspect.
In the insert molding method described above, the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is selected from Sn-based materials, Bi-based materials, Zn-based materials, and Mg-based materials. Wherein the molten metal is an Al-based material.

As a specific example, the part to be cast is F
It is made of an Fe-based material that is e or an Fe alloy or an Al-based material that is Al or an Al alloy. The metal material forming the film is Sn or Sn alloy, which is Sn.
Material, Bi material that is Bi or Bi alloy, Zn
Alternatively, it is made of at least one of a Zn-based material that is a Zn alloy and Mg or a Mg-based material that is a Mg alloy. The molten metal is Al or Al alloy
It is an l-based material.

The melting point in this case is as follows: molten metal (Al-based material)> coating (Sn-based material, Bi-based material, Zn-based material, M
g-based material). By combining metal materials in this way, the part to be cast and the casting are firmly joined via the coating, and the adhesion between the part to be cast and the casting is improved even if the intermediate layer is one layer. Can be.

According to the sixth aspect of the present invention, there is provided a method for assembling an insert.
In the stuffing method according to the above aspect, the part to be stuffed is made of an Fe-based material or an Al-based material, and the metal material forming the film is at least one of a Sn-based material, a Zn-based material, and a Bi-based material. And the molten metal is M
It is a g-based material.

As another specific example, the part to be cast-in is made of an Fe-based material that is Fe or an Fe alloy or is made of Al.
Alternatively, it is made of an Al-based material that is an Al alloy. And
The metal material forming the film is at least one of Sn-based material such as Sn or Sn alloy, Zn-based material such as Zn or Zn alloy, and Bi-based material such as Bi or Bi alloy. The molten metal is a Mg-based material such as Mg or a Mg alloy.

In this case, the melting point has a relation of molten metal (Mg-based material)> film (Sn-based material, Zn-based material, Bi-based material). By combining metal materials in this way, the part to be cast and the casting are firmly joined via the coating, and the adhesion between the part to be cast and the casting is improved even if the intermediate layer is one layer. Can be.

According to a seventh aspect of the present invention, there is provided a method for assembling the insert.
In the as-casting method, the as-molded part is made of an Fe-based material, and the metal material forming the film is N.
The molten metal is made of at least one of an i-based material, a Cu-based material, and an Ag-based material, and the molten metal is an Fe-based material.

As another specific example, the part to be cast-in is made of an Fe-based material that is Fe or an Fe alloy. The metal material forming the film is at least one of a Ni-based material such as Ni or a Ni alloy, a Cu-based material such as Cu or a Cu alloy, and an Ag-based material such as Ag or an Ag alloy. The molten metal is an Fe-based material that is Fe or an Fe alloy.

In this case, the melting point has a relation of molten metal (Fe-based material)> film (Ni-based material, Cu-based material, Ag-based material). By combining metal materials in this way, the part to be cast and the casting are firmly joined via the coating, and the adhesion between the part to be cast and the casting is improved even if the intermediate layer is one layer. Can be.

According to the eighth aspect of the present invention, there is provided a method for assembling an insert.
8. The method for assembling according to any one of items 7 to 7, wherein the coating is formed on the surface of the part to be assembled having a surface roughness of 1 to 20 μmRz.

The surface roughness of the surface of the part to be stuffed is 20 μm.
If it is larger than Rz, it becomes difficult to form a uniform film, and if the film is thin, the adhesion between the part to be stuffed and the casting may be reduced. Further, if the surface roughness of the surface of the part to be stuffed is smaller than 1 μmRz, a sufficient anchoring effect cannot be obtained, and when the part is stuffed, the adhesion between the part to be stuffed and the casting may be reduced.

Therefore, by forming a film on the surface of the part to be stuffed having a surface roughness of 1 to 20 μm Rz, the film can be particularly firmly adhered to the surface of the part to be stuffed. In this way, the cast-in target component and the casting can be more firmly joined via the coating.

According to a ninth aspect of the present invention, there is provided a method for assembling an insert.
9. The method according to any one of items 1 to 8, wherein the thickness of the film is 5 μm or less. If the thickness of the coating exceeds 5 μm, the peeling resistance of the coating may be reduced. Therefore, by setting the thickness of the film to 5 μm or less, the film can be more firmly adhered to the surface of the part to be cast-in. In this way, the cast-in target component and the casting can be more firmly joined via the coating.

According to a tenth aspect of the present invention, in the stuffing method according to any one of the first to eighth aspects, the thickness of the coating is 2 μm or less. By setting the thickness of the coating to 2 μm or less, the coating can be particularly firmly adhered to the surface of the part to be cast. By doing so, the part to be cast-in and the casting can be more firmly joined via the coating.

According to a twelfth aspect of the present invention, in the stuffing method according to any one of the first to tenth aspects, the film formed on the surface of the part to be stuffed is made of a metal material forming the film. It is formed by spraying the fine particles or the fine particles coated with the metal material at a high speed onto the surface of the as-cast part.

By spraying the fine particles on the surface of the part to be stuffed at high speed in this way, the surface of the part to be stuffed is activated, the surface stress is increased, and the adhesion of the film is improved. Further, a thin film can be easily formed even with a metal having a low melting point. In this way, the cast-in target component and the casting can be more firmly joined via the coating.

According to a twelfth aspect of the present invention, there is provided a method of assembling according to any one of the first to eleventh aspects, wherein the part to be assembled is a cylinder liner of an internal combustion engine.
The coating is formed on the outer peripheral surface of the cylinder liner, and the coating is cast in the molten metal to form a cylinder block.

By applying the present invention to the formation of a cylinder block of an internal combustion engine, the cylinder block can be formed to be strong. Further, since the joining rate between the cylinder liner and the casting is increased, the heat transfer rate from the cylinder liner to the casting is improved, and the temperature of the bore wall can be effectively reduced. This is effective in improving the performance of the internal combustion engine, improving oil consumption, and reducing friction.

According to a thirteenth aspect of the present invention, in the stuffing method according to the twelfth aspect, the cylinder block is made of an Al-based material or Mg with respect to the cylinder liner.
It is formed by a die casting method using a system material.

As a specific example, a cylinder block of an internal combustion engine is made of an Al-based material or Mg with respect to a cylinder liner.
The above-described effects can be produced by applying the present invention to a material formed by a die casting method using a system material.

According to a fourteenth aspect of the present invention, a stuffed product is manufactured by using the stuffing method according to any one of the first to thirteenth aspects. The above-described effects can be exerted on the thus manufactured cast-in product.

[0043]

[First Embodiment] FIG. 1 is a partial sectional view of an internal combustion engine 2 to which the above-mentioned invention is applied. Here, the internal combustion engine 2 includes a cylinder block 4 and a cylinder head 6. A bore 9 is formed in the upper part 4 a of the cylinder block 4 by casting a cylinder liner 8. A piston 10 is disposed in the bore 9 so as to be vertically movable. The lower portion 4b of the cylinder block 4 forms a crankcase.

The cylinder liner 8 is a cylindrical body made of an aluminum powder alloy, and is filled when the whole cylinder block 4 is cast by a die casting method using an Al alloy. The cylinder liner 8 is formed as a dry liner inside the cylinder block 4 so as to be separated from the water jacket 12 by a partition wall 14 of the cylinder block 4.

FIG. 2B is a cross-sectional view of the cylinder liner 8 before being cast, and FIG. 2A is a partially enlarged view thereof. Here, the outer peripheral surface 8a of the cylinder liner 8 has a surface roughness of 1 to 20 μmRz. Cylinder liner 8
Examples of the type of the aluminum powder alloy of the metal material constituting Al include, for example, Al alloy powder (Al-27Si-Mn-M
An Al-based material obtained by adding 5% of a ceramic powder as a reinforcing agent to g) and sintering the same.

The cylinder liner 8 can be manufactured by extruding an aluminum powder alloy from a die under high temperature and high pressure. The surface roughness can be adjusted by forming an aluminum powder alloy into a cylindrical shape and then forming irregularities on the outer peripheral surface by a shot peening method, a shot blast method, or the like.

The outer peripheral surface 8 of the cylinder liner 8
A film 16 is formed on a from a metal material different from the metal material forming the cylinder liner 8. The coating 16 is made of a metal material having a melting point lower than the melting point of the metal material forming the cylinder block 4. Here, the coating 16 is composed of 100% Sn or 100% Al. The formation of the film 16 is made of 5
It can be performed by various forming methods such as a method of spraying a fine shot having a particle size of 0 μm or less at high speed onto the outer peripheral surface 8a of the cylinder liner 8, a plating method, a vacuum deposition method, and a method of spraying molten metal by a spray gun. is there.

When the cylinder block 4 is manufactured, the cylinder liner 8 is previously formed by extrusion molding as described above, and the surface roughness of the outer peripheral surface 8a is 1 to 20 μm.
Rz is adjusted, and a film 16 is formed on the outer peripheral surface 8a.
The cylinder liner 8 is disposed in a die casting mold, and an aluminum alloy (for example, ADC1) is formed in a cavity formed between the die casting mold and the outer peripheral surface 8a of the cylinder liner 8.
0) is cooled by pressure injection. Thus, FIG.
As shown in (1), a cylinder block 4 in which an aluminum alloy cylinder liner 8 is integrally cast in an aluminum alloy matrix is completed.

[Measurement of Adhesion Strength] The adhesion strength between the cylinder liner 8 and the cylinder block 4 in a specific combination is shown in FIGS. Comparative examples 1 and 2 used a cylinder liner having no coating 16 formed thereon.
Shown as 2.

In the first to third embodiments, the cylinder liner 8 is formed by extrusion using an aluminum powder alloy, and the outer peripheral surface of the cylinder liner is formed to about 1 to 5 μm by shot peening.
After roughening to mRz, a 100% Sn film or 100% Al film is formed by spraying Sn or Al powder having a particle size of 50 μm or less at high speed. In Example 4, a 100% Sn film was formed on the outer peripheral surface of the cylinder liner by electroplating.

In Comparative Examples 1 and 2, the surface of the cylinder liner formed in the same manner as in Examples 1 to 4 was roughened to 3 to 25 μm Rz, and no coating was provided on the outer peripheral surface. Here, in FIG. 3, the column of “peeling after cutting” shows the result of whether or not the piece was cut out when the piece was cut out for measuring the adhesion strength. "○" means no peeling,
"△" indicates that there was slight peeling, and "x" indicates that the peeling was almost complete and the adhesion strength could not be measured.

According to the first embodiment described above, the following effects can be obtained. (I). As can be seen from FIG. 3, a first embodiment in which a coating is formed on the outer peripheral surface of the cylinder liner with a metal material different from the cylinder liner and having a melting point lower than the melting point of the molten metal (cylinder block). In the cases of Nos. 1 to 4, the adhesion strength was sufficiently higher as compared with Comparative Examples 1 and 2 in which a similar film was not formed.

The reason for this is that when the film is formed on the cylinder liner, a layer having higher adhesion is formed on the surface of the cylinder liner than when a molten metal is directly poured onto the cylinder liner and a casting is formed directly. Conceivable.

Further, since the coating is made of a metal material having a melting point lower than the melting point of the molten metal to be cast, when the molten metal is poured onto the cylinder liner on which the coating is formed,
The coating melted by the heat of the molten metal and the molten metal fuse together. It is considered that the interface between the film and the cylinder block is thereby firmly joined.

Therefore, the cylinder liner and the cylinder block are firmly joined via this film. Thus, even if the intermediate layer between the cylinder liner and the cylinder block is a single layer, the adhesion between the cylinder liner and the cylinder block can be improved.

(B). Since the thickness of the coating is 5 μm or less, especially 2 μm or less, even if it reacts with the molten metal to form an intermetallic compound, it is hard to become brittle and hard to peel off. Can adhere. In this way, the cylinder liner and the cylinder block can be more firmly joined via the film.

(C). By adjusting the surface roughness of the outer peripheral surface of the cylinder liner to 1 to 5 μmRz, a sufficient anchor effect is generated, and the film can be more firmly adhered to the cylinder liner surface. In this way, the cylinder liner and the cylinder block are more firmly joined via the film.

(D). In particular, the coatings of Examples 1 to 3 were prepared by depositing Sn or Al having a particle size of 50 μm or less on a cylinder liner.
It is formed by spraying powder at high speed. As a result, the surface of the cylinder liner is activated and the surface stress can be increased, so that an extremely high bonding can be realized as compared with the coating of Example 4 by electroplating.

(E). Also, high adhesion between the cylinder liner and the cylinder block can be obtained in this way,
The heat transfer coefficient from the cylinder liner to the cylinder block is also improved, and the heat absorption by the cooling water flowing in the water jacket 12 can be efficiently performed, so that the inner wall temperature of the bore 9 can be sufficiently reduced. As a result, engine performance such as the rotation speed of the internal combustion engine can be improved. Furthermore, it is also effective in reducing the consumption performance and friction of the lubricating oil.

[Second Embodiment] In the second embodiment, cast iron is used as the metal material forming the cylinder block 4 and the cylinder liner 8 in the configuration shown in FIGS. The type of this cast iron is FC2
30, FC250, etc. can be used. The cylinder liner 8 is manufactured by centrifugal casting or the like. The adjustment of the surface roughness is as described in the second embodiment. Unless otherwise described, the other configuration is the same as that of the first embodiment.

On the outer peripheral surface 8a of the cylinder liner 8, a metal material different from the cylinder liner 8 and constituting the cylinder block 4 (here, FC23) is used.
Coating 1 made of a metal material having a melting point lower than the melting point of 0)
6 are formed. Here, the film 16 is made of Cu. The method of forming the film 16 is as described in the second embodiment.

In manufacturing the cylinder block 4, as described above, the cylinder liner 8 is formed by casting, the surface roughness of the outer peripheral surface 8a is adjusted to 1 to 20 μmRz, and the coating 16 is formed on the outer peripheral surface 8a. deep. The cylinder liner 8 is arranged in a mold, and a molten cast iron is poured into a cavity formed between the mold and the outer peripheral surface 8a of the cylinder liner 8 to be cooled. Thus, as shown in FIG. 1, the cylinder block 4 in which the cylinder liner 8 is integrally cast in the cast iron matrix is completed.

[Measurement of Adhesion Strength] The adhesion strength between the cylinder liner 8 and the cylinder block 4 in a specific combination is shown in FIGS. An example using a cylinder liner on which the coating 16 is not formed is shown as Comparative Example 3.

In Examples 5 and 6, the cylinder liner 8 was formed from cast iron by centrifugal casting, and the outer peripheral surface of the cylinder liner was roughened to about 5 to 10 μm Rz by shot peening. And a 100% Cu film having a thickness of 1 μm was formed by spraying.

In Comparative Example 3, the surface of the cylinder liner formed in the same manner as in Examples 5 and 6 was roughened to 5 μmRz.
No coating was provided on the outer peripheral surface. According to the second embodiment described above, the following effects can be obtained.

(A). As can be seen from FIG. 4, a 1 μm film is formed on the outer peripheral surface of the cylinder liner with a metal material (100% Cu) that is different from the cylinder liner and has a melting point lower than the melting point of the molten metal (FC230). In the case of Examples 5 and 6 where is formed, the adhesion strength is sufficiently higher than in Comparative Example 3 where a similar film is not formed.

This corresponds to (A) of the first embodiment,
It is considered that the interface between the film and the cylinder block achieves strong bonding by the mechanism described in (b), and the cylinder liner and the cylinder block are firmly bonded via the film. Thus, even if the intermediate layer between the cylinder liner and the cylinder block is a single layer, the adhesion between the cylinder liner and the cylinder block can be improved.

(B). The surface roughness is 5 to 10 μm Rz.
With this adjustment, the coating can be more firmly adhered to the cylinder liner surface by the anchor effect. In this way, the cylinder liner and the cylinder block can be more firmly joined via the film.

(C). In particular, the coatings of Examples 5 and 6 were formed by spraying Cu metal powder having a particle size of 50 μm or less at high speed onto a cylinder liner. Thus, it can be seen that extremely high bonding is realized by the mechanism described in (d) of the first embodiment.

(D). Furthermore, Examples 1 to 1 of Embodiment 1
Even in comparison with No. 4, the adhesion strength tends to increase as shown in a bar graph in FIG. (E). In addition, since high adhesion is obtained between the cylinder liner and the cylinder block in this way, the mechanism described in (e) of the first embodiment can lower the inner wall temperature of the bore 9 and improve engine performance. It is also effective for improving the lubricating oil consumption performance and reducing friction.

[Other Embodiments] In the first embodiment, the coating may be made of the same metal material as the molten metal to be the cylinder block. For example, in the first to fourth embodiments, the same aluminum alloy as the metal material of the cylinder block may be used as the film. In this case, even if the coating and the cylinder block are the same metal material, the coating is formed on the cylinder liner first, so it has much better adhesion than when the cylinder liner is cast directly from an aluminum alloy Is considered to be formed. Then, since the same metal material comes into contact with the molten metal from above, the surface of the film is sufficiently melted, and a strong connection with the cylinder block side is achieved.

In the first and second embodiments, a combination in which the melting point of the coating is lower than the melting point of the cylinder block is used. Alternatively, a combination in which the melting point of the coating is equal to the melting point of the cylinder block may be used. . For example, there is a case where the coating and the metal material of the cylinder block are the same aluminum alloy as described above. Also in this case, the effects described in the first and second embodiments are obtained.

Although not shown in the concrete measurement values, as an embodiment of the present invention, the cylinder block
In the case of an l-based material, as a metal material for forming a film, in addition to a Sn-based material and an Al-based material, a Bi-based material,
A Zn-based material or a Mg-based material can be used.
When the cylinder block is made of an Fe-based material, the metal material for forming the coating may be Ni-based in addition to the Cu-based material.
-Based materials and Ag-based materials can be used. When the cylinder block is made of a Mg-based material, a Sn-based material, a Bi-based material, a Zn-based material, or a Mg-based material can be used as a metal material for forming a film.

The embodiments of the present invention have been described above. However, it should be added that the embodiments of the present invention include the following embodiments. (1). Between the casting and the cast-in part, the intermediate layer is formed of a metal material different from the metal material constituting the cast-in part and having a melting point equal to or lower than the melting point of the casting. Characteristic cast-in products.

(2). (1) In the stuffed product according to (1), the stuffed part is made of an Fe-based material or an Al-based material, and the metal material forming the intermediate layer is a Sn-based material, a Bi-based material, a Mg-based material, Zn-based material and Al
At least one of the base materials, wherein the casting is Al
A cast-in product characterized by being a base material.

(3). (1) In the stuffed product according to (1), the stuffed part is made of an Fe-based material or an Al-based material, and the metal material forming the intermediate layer is a Sn-based material, a Bi-based material, a Zn-based material, A cast-in product comprising at least one of Mg-based materials, wherein the casting is a Mg-based material.

(4). Between the casting and the cast-in part, the intermediate layer is formed of a metal material different from the metal material constituting the cast-in part and having a melting point lower than the melting point of the casting. Characteristic cast-in products.

(5). (4) In the stuffed product according to (4), the stuffed part is made of an Fe-based material or an Al-based material, and the metal material forming the intermediate layer is a Sn-based material, a Bi-based material, a Zn-based material, and A cast-in product comprising at least one of Mg-based materials, wherein the casting is an Al-based material.

(6). (4) In the stuffed product according to (4), the wrapped part is made of an Fe-based material or an Al-based material, and the metal material forming the intermediate layer is a Sn-based material, a Zn-based material, or a Bi-based material. At least one of
Wherein the casting is a Mg-based material.

(7). (4) In the stuffed product according to (4), the stuffed part is made of an Fe-based material, and the metal material forming the intermediate layer is at least one of a Ni-based material, a Cu-based material, and an Ag-based material. Wherein the casting is an Fe-based material.

(8). (1) The cast product according to any one of (1) to (7), wherein the intermediate layer is 1 to 20 μm Rz.
A cast-in product characterized by being formed on the surface of a cast-in part having a surface roughness of.

(9). (1) The insert product according to any one of (1) to (8), wherein the thickness of the intermediate layer is 5 μm or less. (10). (1) The insert product according to any one of (1) to (8), wherein the thickness of the intermediate layer is 2 μm or less.

(11). (1) In the stuffed product according to any one of (1) to (10), the intermediate layer formed on the surface of the stuffed part has fine particles made of a metal material forming the intermediate layer before stuffing or the intermediate layer. A stuffed product formed by spraying fine particles coated with a metal material onto the surface of the stuffed part at high speed.

(12). (1) The cast-in product according to any one of (1) to (11), wherein the cast-in part is a cylinder liner of an internal combustion engine, wherein the intermediate layer is formed on an outer peripheral surface of the cylinder liner, and the intermediate layer portion is provided. A cast-in product, characterized in that a cylinder block is formed by being cast in the metal material.

(13). (12) The insert product according to (12), wherein the cylinder block is formed of an Al-based material or a Mg-based material by a die casting method with respect to the cylinder liner.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an internal combustion engine according to a first embodiment.

FIG. 2 is an explanatory diagram of a configuration of a cylinder liner according to the first embodiment.

FIG. 3 is an explanatory diagram of a measurement example of adhesion strength according to the first embodiment.

FIG. 4 is an explanatory diagram of a measurement example of adhesion strength according to the second embodiment.

FIG. 5 is a comparative explanatory diagram of the adhesion strength between Examples 1 to 6 and Comparative Examples 1 to 3.

[Explanation of symbols]

2 internal combustion engine, 4 cylinder block, 4a upper part, 4b lower part, 6 cylinder head, 8 cylinder liner, 8a outer peripheral surface, 9 bore, 10 piston, 1
2: water jacket, 14: partition, 16: coating.

Claims (14)

[Claims] 1. A stuffing method for producing a stuffed product by stuffing a part to be stuffed with a molten metal, wherein the metal material is different from a metal material constituting the part to be stuffed. A method according to claim 1, further comprising, for the part to be stuffed in which a coating made of a metal material having a melting point equal to or lower than the melting point of the molten metal is formed on the surface, stuffing the coating part with the molten metal. 2. The method according to claim 1, wherein the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is an Sn-based material.
A method for assembling inserts comprising at least one of an i-based material, a Zn-based material, a Mg-based material, and an Al-based material, wherein the molten metal is an Al-based material. 3. The method according to claim 1, wherein the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is an Sn-based material.
A method for assembling inserts, comprising at least one of an i-based material, a Zn-based material, and a Mg-based material, wherein the molten metal is a Mg-based material. 4. A stuffing method for producing a stuffed product by stuffing a part to be stuffed with molten metal, wherein the metal material is different from a metal material constituting the part to be stuffed. A stuffing method, comprising: stuffing the film portion with the molten metal with respect to the part to be stuffed, on which a film made of a metal material having a melting point lower than the melting point of the molten metal is formed. 5. The method according to claim 4, wherein the part to be inserted is made of an Fe-based material or an Al-based material, and the metal material forming the film is an Sn-based material.
3. A method according to claim 1, wherein the molten metal is at least one of an i-based material, a Zn-based material and a Mg-based material, and the molten metal is an Al-based material. 6. A method according to claim 4, wherein said part to be inserted is made of an Fe-based material or an Al-based material, and said metal material forming said film is an Sn-based material;
A method for assembling inserts, comprising at least one of an n-based material and a Bi-based material, wherein the molten metal is a Mg-based material. 7. A method according to claim 4, wherein said part to be inserted is made of an Fe-based material, and said metal material forming said film is a Ni-based material, a Cu-based material and an Ag-based material.
The method according to claim 1, wherein the molten metal is at least one of a base material and the molten metal is a Fe-based material. 8. The method according to claim 1, wherein said coating is formed on a surface of a part to be filled with a surface roughness of 1 to 20 μmRz. 9. The method according to claim 1, wherein said coating has a thickness of 5 μm or less. 10. The method according to claim 1, wherein said coating has a thickness of 2 μm or less. 11. A method according to any one of claims 1 to 10, wherein the film formed on the surface of said part to be stuffed is coated with fine particles of said metal material forming said film or said metal material. A method for forming a stuffing, characterized in that the blasting process is performed by spraying the fine particles to the surface of the part to be stuffed at a high speed. 12. The method according to claim 1, wherein the part to be inserted is a cylinder liner of an internal combustion engine, and the coating is formed on an outer peripheral surface of the cylinder liner. A method for forming a cylinder, comprising forming a cylinder block by forming a coating portion from the molten metal. 13. A method according to claim 12, wherein said cylinder block is formed of an Al-based material or an Mg-based material by a die casting method with respect to said cylinder liner. 14. A stuffed product manufactured by using the stuffing method according to any one of claims 1 to 13.