JPS60114533A - Method and device for producing alloy - Google Patents

Abstract

PURPOSE:To form an alloy having an optional compsn. in the prescribed region in a casting mold without damaging a molding by molding under pressure the assemblage of the fine pieces of the 1st metal in a mold then pouring the melt of the 2nd metal having the m. p. lower than the m. p. of the 1st metal. CONSTITUTION:The randomly oriented fiber assemblage of the 1st metal 6 such as Cu-Zn or the like is packed into a mold cavity 2. The assemblage is pressurized by a plunger 4 to form a compression molding 7. The melt 8 of the 2nd metal such as Mg alloy or the like having the m. p. lower than the m. p. of the 1st metal is poured into the cavity 2 and is pressurized by the plunger 4 to penetrate the melt 8 into the molding 7 thereby alloying the 1st metal and the 2nd metal. The alloy such as Cu-Zn-Mg or the like having the desired uniform structure is formed in the prescribed position in the casting mold by the above- mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to alloys and, more particularly, to methods of making them and the equipment used to carry them out.

PRIOR ART The inventors of the present invention have taken into account various problems c) in the conventional method of manufacturing an alloy by the method of adding and mixing the molten metal or powder of another alloying element to the molten metal of the alloying element, or the sintering method. , a patent application filed by the same applicant as the applicant in 1982-13
No. 8180 discloses a method for producing an alloy consisting of a first metal and a second metal having a melting point lower than that of the second metal, comprising forming a porous body consisting of the first metal; A porous body is placed in a mold, a molten metal of the second metal is poured into the mold, and the molten metal permeates into the porous body, thereby forming the first metal and the second metal. We have proposed a method for producing a covering alloy characterized by forming an alloy in which the second metal is not substantially present alone in the region of the porous body.

In the method for manufacturing the alloy according to the proposal, the specific gravity of the porous body is much smaller than that of the molten metal of the second metal, so the porous body is placed in the mold. When molten metal of the second metal is then poured into the casting chamber, the porous body may rise or tilt due to the fluidity of the molten metal and the difference in specific gravity between the porous body and the molten metal. Otherwise, problems may occur, such as not being able to form an alloy at a predetermined position in the mold, or the porous body hitting the inner wall of the mold or the surface of the runner, resulting in damage. This problem arises because the porous body is placed in a mold that has a volume much larger than the volume of the porous body so that the molten metal of the second metal can penetrate well into the inside of the porous body from the entire circumference of the porous body. In addition, in order to avoid such problems, if the porous body made of the first metal is fixed directly to the inner wall surface of the mold by press-fitting, etc., the permeability of the second metal is reduced. In addition to this, problems arise in that the portion of the porous body that comes into contact with the mold may be crushed or cracks may occur in the porous body.

Purpose of the Invention In view of the above-mentioned problems in the previously proposed method for manufacturing an alloy, the present invention provides a method for manufacturing an alloy that is improved so that such problems do not occur, and an alloy that can be easily implemented. The purpose is to provide manufacturing equipment.

According to the present invention, it is an object of the present invention to provide a method for producing an alloy consisting of a first metal and a second metal having a melting point lower than that of the second metal. A mold having a mold cavity 41 is prepared, the mold cavity is filled with an aggregate of fine pieces of the first metal, the aggregate is pressurized in the mold cavity by a first plunger, and the A molten metal of the second metal is poured into a mold cavity, and the molten metal is pressurized by a second plunge V that is tightly fitted into the mold cavity so as to be reciprocally movable along the axis. A method for producing an alloy in which the first metal and the second metal are infiltrated into the pressurized aggregate, thereby alloying the first metal and the second metal, and the first metal has a lower melting point than the second metal. An apparatus for use in the production of an alloy comprising a second metal and a second metal comprising: a mold cavity extending along an axis; a first portion defining a bottom wall of the mold cavity; a mold having a mold cavity comprising a second portion having a cross-sectional area larger than N; minutes, the mold cavity closely fitting with said second portion and reciprocating relative to said mold along said axis; A movable cylindrical outer plunger 1J is closely fitted with the outer plunger 1J in a large cylindrical manner, and is capable of reciprocating relative to the mold and the outer plunger along the axis, and has a distal end that is connected to the first outer plunger. This is achieved by means of a device having an inner plunger 1 that fits into a portion of the .

Effects and Effects of the Invention According to the manufacturing method of the present invention, a compression molded body made of fine pieces of the first metal is formed at a predetermined position in the mold cavity of the casting mold, and the compression molded body is formed in the mold cavity. By being press-fitted and fixed in place, the compression-molded body is prevented from displacing relative to the mold, so the ratio of the apparent specific gravity of the compression-molded body to the molten metal of the second metal is
Even if there is a significant difference between the molten metal and the molten metal, it is possible to avoid displacement of the compression molded body within the mold due to the flow action of the molten metal at the stage when the molten metal of the second metal is poured into the mold. ,
In addition, while the compression molded body is held at a predetermined position in the mold, the second metal (8 gata) is introduced into the mold and the molten metal is immersed into the compression molded body. A desired alloy can be produced in a predetermined area within the mold without causing defects in the compression molded product. Further, according to the manufacturing method of the present invention, the thermal conductivity of the fine pieces of the first metal is generally high, the heat capacity of the aggregate is generally relatively small, and the compression molded body made of the fine pieces of the first metal is is formed in the mold, so the compression molded product is preheated to the temperature of the mold during the process of forming the compression molded product. The molten metal of the second metal can be permeated into the molded body.

Further, according to the alloy manufacturing apparatus of the present invention, the inner plunger compresses the fine pieces of the first metal to form a compression molded body, and the inner plunger and the outer plunger add the molten metal of the second metal 711'. As a result, a draft angle can be created on the side wall surface of the mold cavity of the mold.
Thereby, a desired alloy having a relatively large volume can be easily produced.

In the method for producing an alloy according to the present invention, the first and second metals may be either a single metal element or an alloy, and the "fine pieces" of the first metal may be powder, discontinuous It may be fibers, chips, foil pieces or a mixture thereof, and the first and second plungers may be the same.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below by way of example embodiments with reference to the accompanying figures.

Example 1 First, as shown in FIGS. 1 to 3, a mold 3 having a cylindrical mold cavity 2 with a diameter of 80n+m and a length of 55mm extending along an axis 11, and a mold cavity 2 were prepared. It consists of a plunger 4 that is tightly fitted and capable of reciprocating relative to the mold 3 along the axis 1, and a knockout bin 5 for taking out the solidified body formed in the mold cavity 2 from the mold 3. Casting equipment (mold temperature 300℃
) was prepared. Next, as shown in FIG. 1, 227 g of Cu-7F+ fibers H (Cu − 40%Z
n) 6 aggregates were filled. Next, plunger 4 is used to collect 1000k (1/aI) of Cu-7n fiber IKt6.
The bulk density is 1.64o by pressurizing at a pressure of
A compression molded body 7 having a diameter of 80Il1m and a length of 2Qlllll was formed.

Next, as shown in FIG. 3, 500ccXWm of magnesium alloy (
Pour molten metal 8 of ASTM standard AZ91 C),
75'OK by plunge v4.

It was pressurized at a pressure of /lJ9, and the pressurized state was maintained until the molten metal completely solidified by 7.1'1J. After the molten metal was completely solidified, the solidified material was removed from the mold 3 using a knockout bottle 5. When the solidified body was cut along the axis, a C1-7n-MO alloy with the desired uniform structure was formed at a predetermined position in the mold, and defects such as defects in the compression molded body were also observed. There wasn't. The macroscopic composition of the Qu -,7-n-MQ alloy formed as described above is Mu
-32,5%C1,1-21,7%Z11 and lC0
Example 2 Using one embodiment of the alloy 3ti device according to the present invention as shown in FIGS. 4 to 6, the following <Ti-
An Al alloy was produced.

First, as shown in FIGS. 4-6, a substantially cylindrical mold cavity 12 extends along an axis 11.
a mold 13 having a mold 13; a plunger 14 that tightly fits into the mold cavity 12 and is capable of reciprocating along the axis 11;
The solidified body formed in the mold cavity 2 is transferred to the mold 1.
An alloy manufacturing apparatus (mold temperature: 350° C.) consisting of a knockout bin 15 for taking out the alloy from inside 3 was prepared. In this case [−
The mold cavity 12 includes a cylindrical first portion 12a having a diameter of 80111111° and a length of 30mm, which extends along the axis 11 and defines the bottom surface of the mold cavity, and a cylindrical first portion 12a, which extends along the axis 11 and has a diameter of 85mm, and a length of 50mm.
It consists of a + cylindrical second part 12b and a third part 12c having a length of 70111111 which interconnects the negative and second parts and has a draft angle at a Taber angle of 2''. J3, the plunger 14 has a cylindrical outer plunger t-1/Ia which is closely fitted with the second portion 12b and can be reciprocated relative to the mold 13 along the axis 11J11, and the outer plunger and the outer plunger t-1/Ia. #8
A11, the first portion 12 is movable relative to the mold 13 and the outer plansite 14a, and the first portion 12 is movable at the tip thereof.
It consisted of a cylindrical inner plunger 14b with a diameter of 79.5 m111 that fits into the inner plunger 14b.

Then, as shown in Figure 4, the average particle size was 25 μm.
An aggregate of 228 g of pure titanium (purity 97.0%) powder 146 was filled into the first portion 12a of the seven-wheeled cavity 12. Next, as shown in Fig. 5, the plunger 14 was fitted into the mold cavity 12, and the inner plunger 1-141) was used to pressurize pure butanium powder at a pressure of 1500 kg/Cl11'. The bulk density of pure titanium powder in the first part 12a of the mold cavity is 2.27+.
A circle U with a diameter of 8'Qmm and a length of 20...m that is II/CC
A compression molded body 17 having a shape was formed.

Next, after removing the plunger 14 from the mold 13, -
6'O'Occ in ruby cavity 12, water temperature 8
Shun poured a molten metal 18 of 00'C pure aluminum (purity 99.7' older brother) and held it in that state for 10 seconds, as shown in Figure 6.
The C silane sheet 14 is fitted into the second part 121) with the lower end of the inner blank sheet 141) aligned with the lower end of the inner blank sheet 141), and the molten metal 18 is heated by the plunger 14 at a rate of 500 ko/min.
Pressure was applied at a pressure of au9, and the pressurized state of a was maintained until the molten metal was completely solidified.

After the molten metal was completely solidified, the solidified material was taken out from the mold 13 using a knocker 1-bin 15. When the solidified body was cut along the axis, the Ti-Al alloy having the desired uniform structure was found in the first part 1 of the mold cavity.
It was formed at a predetermined position within 2a, and due to defects such as damage to the compression molded body, it was not completed. The macroscopic composition of the 1-i-A1 alloy formed as described above is Δ1-62
．． It was 7% King 1.

Embodiment 3 As shown in FIGS. 8 and 9, there is a main part 14c which closely fits into the second part 121) of the mold cavity 12, and a -j part formed integrally with the main part. The plunger 14 was replaced with a plunger 14' having a 2° truncated conical side face right and a protrusion 14d that fits into the first part 12a of the mold cavity at the tip. Using the same alloy manufacturing equipment as that used in Example 2 above, except for this point, the s+-A1 alloy was produced in a WA manner as follows.

First, as shown in FIG.
1 having an average particle size of 40 μ... in the first part 12a of 2.
A mass of 61 g of pure silicon (99.9% purity) powder 19 was charged. Next, as shown in FIG. 8, the plunger 1714' is fitted to the first V biddy 12, and the protrusion 14 (1) is used to compress the aggregate of pure powder 19. , bulk density is 1.179/C
A cylindrical compression molded body 20 having a diameter of 8'Qmm and a length of 2Qmm was formed. Next, remove the plunger 14' from the mold cavity 12 and place it in the mold cavity 12 at 600CC, 3Jff at 1750℃.
Molten metal of aluminum alloy (JIS standard AC4C) 21
was instilled and held for 10 seconds. Then, the plunger 14' pumps the molten metal 21 for 1000 k/ω.
The pressurized state was maintained until the molten metal completely solidified. After the molten metal was completely solidified, the solidified material was removed from the mold '13 using the knockout pin 15. When the solidified body was cut along the axis (-), it was found that the Si-A1 alloy with the desired uniform structure was formed at a predetermined position in the first part of the mold cavity, and the compression molded body was formed. No defects such as defects were observed. (Improvement) The composition of the 3i-A1 alloy formed as shown in E was IJΔ1-46.5%3i.

Although the present invention has been described above in detail with reference to several embodiments, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. This will be clear to those skilled in the art.

[Brief explanation of drawings]

1 to 3 are schematic cross-sectional views showing the manufacturing process of one embodiment of the method for manufacturing an alloy according to the present invention, and FIGS. FIGS. 7 to 9 are previous sectional views showing the 5A manufacturing process of one embodiment, and FIGS. be. 1... Axis line, 2... Mold cavity, 3...
template. 4... Plunger, 5... Knockout pin, 6...
...CLl-7nlJ fiber, 7... compression molded body, 8...
・Molten magnesium alloy, 11...axis, 12...
・Mold cavity, 12a...first part, 12
b...Second part, 12C...Third part, 13.
...Mold, 14.14'...1 lange l + -14a
...Outa Plunge! . 141) Inner plunger, 14C Main part, 14 (1 Protrusion, 15 Knocker 1 to pin, 11-5 Pure titanium powder, 17 Compression molding Body, IJ)... Molten metal of pure aluminum, 19.
...Pure silicon powder. 20... Compression molded body, 21... Molten metal characteristic δ' of aluminum alloy [Applicant: Toyota Motor Corporation Agent]
Person Patent Attorney Masaru Akashi Figure 1 Figure 2 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (2)

[Claims] (1) A method for producing an alloy consisting of a first metal and a second metal having a melting point lower than that of the second metal - preparing a mold having a mold cavity extending along the C1 axis; The mold cavity is filled with an aggregate of fine pieces of the first metal, the aggregate is pressurized in the mold cavity by a first plunger, and the second metal is filled into the mold cavity. pouring the molten metal and pressurizing the molten metal with a second plunger that fits tightly into the mold cavity in a reciprocating manner along the axis, so that the molten metal permeates into the pressurized assembly; A vJ manufacturing method for an alloy, thereby avoiding alloying the first metal and the second metal. (2) An apparatus used for manufacturing an alloy consisting of a first metal and a second metal having a melting point lower than that of the second metal, the mold cavity extending along an axis; A mold having a mold cavity comprising a first portion defining a bottom wall of the mold cavity and a second portion having a larger cross-sectional area than the second portion, the second portion being tightly fitted with the second portion. a cylindrical outer plunger V capable of reciprocating relative to the mold along the axis; and an inner plunger that is movable in reciprocation relative to the first part and that fits into the first part at its tip.