JPH07252558A - Production of metallic complex material - Google Patents

Abstract

PURPOSE:To provide a producing method of a metallic complex material which can compose on joining surfaces having complicate shape without any defect. CONSTITUTION:Refractory powder is filled up into space of a formed body and the formed body is arranged into a mold and the first molten metal is poured into a space between the formed body and the mold to form a first metallic solidified body, and after removing the refractory powder filled into the space in the formed body, a second metallic solidified body is formed into the space of the formed body. As the other way, binder for mixing the refractory powder is filled into all or a part of the space of the formed body and the first metallic solidified body is formed in the space between the formed body and the mold and/or in the space of the formed body, and the binder for mixing the refractory powder filled into the space of the formed body is removed, and further, the second metallic solidified body joined with the first metallic solidified body is formed in the space of the formed body. As the refractory powder is preset in the part where the molten metal is not hoped to be penetrated into the formed body, a metallic complex material composed of different metals is obtd. by bounding the position of the refractory powder in the formed body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-based composite material in which a metal different from the matrix metal of the metal-based composite material is bonded to the metal-based composite material, or a metal-based composite material in which different kinds of metals are composited. Regarding the method.

[0002]

2. Description of the Related Art A technique for forming a composite of dissimilar metals in a molded product composed of fibers and particles is carried out by simply immersing the molded product in a molten metal or by sucking the molten metal into the molded product. For example, in the method for producing a metal-based composite material disclosed in JP-A-2-4935, Ni short fibers having an average fiber diameter of 20 μm and an average fiber length of 1.5 mm, Al alloy powder having an average particle diameter of 40 μm, and K ₂ ZrF _{5 are used.} The powder is uniformly mixed, the mixture is compression-molded in a mold to form a molded body, and then the molded body is preheated, and one end of the molded body is immersed in the molten metal A to form a molten metal. At the time of dipping to the half of the molded body, the molded body is pulled up from the molten metal, and then the other end of the molded body is dipped in the molten metal B to hold the molten metal until it completely permeates the fiber molded body. ,
The molded body is pulled up from the molten metal and the molten metal is solidified as it is.

[0003]

However, in the case of the conventional method of immersing the molded body in the molten metal, it was difficult to improve the accuracy of the boundary layer.

The present invention has been made in order to solve the above-mentioned problems in the method for producing a metal-based composite material in which a metal different from the matrix metal is bonded to the metal-based composite material or different kinds of metals are composited. Then, it aims at providing the manufacturing method of the metal matrix composite material which can form the boundary layer of a different kind of metal accurately.

[0005]

[Means for Solving the Problems]

The method for producing a metal matrix composite material according to claim 1 is
A step of filling the space of the molded body with the refractory powder, arranging the molded body filled with the refractory powder in a mold, pouring and solidifying the first molten metal into the space between the molded body, Forming a metal solidified body, removing the refractory powder filled in the space of the molded body, and forming a second metal solidified body in the space of the molded body. .

The method for producing a metal matrix composite material according to claim 1 is
All or part of the space of the molded body, a step of filling a binder containing a refractory powder, and the molded body filled with a binder mixed with the refractory powder is placed in a mold, A step of injecting and solidifying the first molten metal into the space between the body and the mold and / or the space of the molded body to form a first metal solidified body, and a binder mixed with the refractory powder filled in the space of the molded body. And the second molten metal is injected into the space of the molded body to solidify,
And a step of forming a second metal solidified body joined to the first metal solidified body.

[0008]

The presence of the refractory powder filled in the space of the compact or the binder mixed with the refractory powder prevents the molten metal from entering the compact. Therefore, it is possible to join different metals with a portion having a binder mixed with refractory powder as a boundary.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described with reference to the drawings.
First, the embodiment of claim 1 will be described. As shown in FIG. 1, the combustion-extinguishing resin film 1 made of a plastic (EVA) film was adsorbed on the inner surface of the mold 2. At this time, air may be sucked through the suction holes 21 provided in the molding die 2 to adsorb the combustion-extinguishing resin film 1. Alternatively, as shown in FIG. The combustion extinguishing sprayed coating 3 may be formed by spraying.

Subsequently, a molding die 2 to which the film 1 is attached is attached.
As shown in FIG. 3, a fiber molded body 4 formed by previously bonding carbon fibers having an average fiber diameter of 7 μm with an adhesive material.
Then, the refractory powder 5 made of silica sand having an average particle diameter of 5 μm was filled. The types of fibers used in the fiber molding are
There is no particular limitation, and boron fibers, silicon carbide fibers, alumina fibers, metal fibers, whiskers and the like can be appropriately used. Molding method of the fiber molded body, for example, by mixing a binder to these fibers and kneading and then molding into a desired shape,
Alternatively, it can be molded by pressing. The refractory powder with which the fiber molded body is filled is not particularly limited as long as it does not soften or melt upon contact with the molten metal, and for example, silica sand or other non-fired ceramic powder can be used. The refractory powder does not necessarily have to be filled in the entire fiber molded body, and may be filled only in the surface layer portion of the fiber molded body.

Next, as shown in FIG. 4, the filled fiber molding 4 and the refractory powder 5 are wrapped in a film 1, vacuumed and taken out from the mold 2, and the fire resistance having a desired shape is obtained. A molded body 6 filled with the powder 5 and wrapped with the film 1 was obtained. By providing the film 1, the silica sand 5 does not come out of the fiber molded body.

Next, as shown in FIG. 5, the obtained molded body 6 is set in the first outer mold 8 for molten metal, and 700
When the first molten metal 7 made of an aluminum alloy (AC4C) at 50 ° C. is injected and solidified, the first molten metal 7 is adhered to the outer peripheral surface of the molded body 6 to solidify the first metal having a desired shape. Body 71 was formed. Further, the coating 1 disappeared by burning.

Next, as shown in FIG.
The solidified body 71 of the first metal that has been solidified by wrapping it is inverted, and the surface of the molded body 6 that has not come into contact with the first metal solidified body 71 is faced down. 5 was removed, and only the fiber molded body 4 was left in the solidified body 71 of the first metal.

Subsequently, as shown in FIG. 7, the refractory powder 5
The removed first metal solidified body 71 is inverted again to the original state, and the second molten metal 9 made of a magnesium alloy (Mg-Al ASTM standard A8) at 680 ° C. is contained in the fiber molded body 4. When was injected and solidified, as shown in FIG.
A second metal solidified body 91 was obtained in which the matrix metal phase was filled in the fiber molded body 4 and the outer peripheral interface was in close contact with the interface of the first metal solidified body 71.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. In the mold 2,
As shown in FIG. 9, approximately half 4a of the fiber molded body 4 formed by bonding carbon fibers having an average fiber diameter of 7 μm with an adhesive in advance, and Kibushi clay 5 mixed with silica sand having an average particle diameter of 5 μm. Is filled in the molding die 2 and the upper half 4 of the fiber molding 4 is filled.
A molding die 6 filled with the kibushi clay 5 in which b was exposed to the outside was manufactured. Since the binder 5 does not flow out from the molded body, the film used in Example 1 is unnecessary.

Next, as shown in FIG. 10, the molding die 2 filled with the molding die 6 filled with the knotoshi clay 5 is placed so that the fiber molding 4b exposed to the outside faces downward. The first molten metal 7 made of an aluminum alloy (AC4C) at 700 ° C. was injected into the mold 8 under pressure and solidified. As a result, the fiber molding 4b was partially filled with the first metal as a matrix. A solidified body 71 of the first metal was obtained.

Subsequently, as shown in FIG. 11, the molding die 2 is removed from the solidified body 71 of the first metal, and then the molding die 6 filled with the knotobushi 5 as shown in FIG. The binder 5 mixed with the refractory powder was removed from the above, and only the fiber molded body 4a was exposed from the solidified body 71 of the first metal.

Next, as shown in FIG. 13, the solidified body 71 of the first metal is set in the second outer die 81, and 680
C. Magnesium alloy (Mg-Al ASTM standard A
When the second molten metal 9 consisting of 8) was injected and solidified,
A second metal solidified body 91 was obtained in which the matrix metal phase was filled in the fiber molded body 4a and the interface was in close contact with the interface of the first metal solidified body 71.

[0019]

EFFECTS OF THE INVENTION The refractory powder is placed in advance in the portion of the molded body where the molten metal is not desired to penetrate, so that the penetration of the molten metal is prevented. Therefore, a metal-based composite material having different metals is obtained with the position of the refractory powder in the molded body as a boundary.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a combustion-extinguishing film is adsorbed on a molding die in the manufacturing method of Example 1.

FIG. 2 is a cross-sectional view showing a state in which a combustion-extinguishing resin is sprayed onto a molding die in the manufacturing method of Example 1.

FIG. 3 is a cross-sectional view of a molding die in which a combustion-extinguishing film is adsorbed in a manufacturing method of Example 1, and a fiber molding and refractory powder are filled in the molding die.

FIG. 4 is a cross-sectional view showing a state in which a molding die is taken out by wrapping around a fiber molding filled with a fire-extinguishing powder with a refractory powder in a manufacturing method of Example 1 and drawing a vacuum.

5 is a cross-sectional view showing a state in which a molded body wrapped with a film and filled with refractory powder is set in an outer mold and the first molten metal is injected in the manufacturing method of Example 1. FIG. .

FIG. 6 is a cross-sectional view showing a state in which the solidified body of the first metal is inverted and the refractory powder is removed in the manufacturing method of Example 1.

FIG. 7 is a cross-sectional view showing a state in which the second molten metal is being poured into the fiber compact left in the first metal solidified body in the manufacturing method of Example 1.

FIG. 8 is a cross-sectional view of the completed metal matrix composite material.

FIG. 9 is a cross-sectional view showing a state in which a molding die is filled with a binder in which half of the fiber molded body and refractory powder are mixed in the manufacturing method of Example 2.

FIG. 10 is a cross-sectional view showing a state in which the fibrous molded body exposed from the molding die is faced down and immersed in the first molten metal to be solidified in the manufacturing method of Example 2.

FIG. 11 is a cross-sectional view showing a state where a molding die is extracted from the first metal combined body in the manufacturing method according to the second embodiment.

FIG. 12 is a cross-sectional view of a molded body in a state where the binder mixed with the refractory powder is removed in the manufacturing method of Example 2.

FIG. 13 is a diagram showing a manufacturing method of Example 2 in which a solidified body of a first metal having an exposed fiber molded body is put into an outer mold, and a second molten metal is poured into a space inside the outer mold and the fiber molded body. It is sectional drawing which shows the state.

[Explanation of symbols]

 4 ... Fiber molded body (molded body) 5 ... Fire resistant powder 7 ... First molten metal 71 ... First metal solidified body 8 ... First molten metal outer die (mold) 81 ... Second molten metal outer die (mold) 9 ... Second molten metal 91 ... Second metal solidified body

Claims (2)

[Claims] 1. A step of filling a space of a molded body with refractory powder, arranging the molded body filled with the refractory powder in a mold, and injecting a first molten metal into the space between the molded body and the mold. Solidify,
It comprises a step of forming a first metal solidified body, a step of removing the refractory powder filled in the space of the molded body, and a step of forming a second metal solidified body in the space of the molded body. And a method for producing a metal matrix composite material. 2. A step of filling all or part of the space of the molded body with a binder mixed with refractory powder, and a molded body filled with the binder mixed with the refractory powder in a mold. Arranging and injecting and solidifying the first molten metal into the space between the molded body and the mold and / or the space of the molded body to form the first metal solidified body, and mixing the refractory powder filled in the space of the molded body. The step of removing the binder, and the second molten metal injected into the space of the compact and solidified, and then joined to the first metal solidified body.
And a step of forming a metal solidified body, the method for producing a metal-based composite material.