JPS60114537A - Production of alloy - Google Patents

Abstract

PURPOSE:To form an alloy having an optional compsn. in the prescribed region in a casting mold without generating fracture in a porous body of the 1st metal by disposing said porous body in the casting mold and pressing a perforated holding element thereon then pouring the 2nd metal into the mold. CONSTITUTION:A green compact molding 5 is formed of the 1st metal such as pure Ni powder or the like. The molding 5 is preheated and is disposed in a casting mold 7. A holding plate 8 such as a stainless steel screen or the like is disposed on the molding 6 and the circumferential edge part thereof is fixed by pressing-fitting thereof to the inside wall surface 9 of the mold 7 or the like. The melt 10 of the 2nd metal such as pure Al or the like is then poured to penetrate the melt 10 into the porous molding 5 thereby alloying the 1st and 2nd metals. The alloy such as Ni-Al or the like having the desired uniform structure is formed in the prescribed position under the plate 8 by the above-mentioned method without generating fracture, etc. of the molding 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to alloys, and more particularly to methods of manufacturing the same.

PRIOR ART Inventor Satoshi G., unique problems in conventional methods of manufacturing alloys by adding and mixing molten metals or powders of other alloying elements to molten metals of alloying elements and sintering methods. In view of this, the patent application filed by the same applicant as the applicant in 1982-138
No. 180 discloses a method for producing an alloy comprising a first metal and a second metal having a lower melting point than the second metal, comprising forming a porous body comprising 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 allowing the first metal and the second metal to be mixed. A method for manufacturing an alloy has been proposed, characterized in that the second metal is alloyed to form 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, since the apparent specific gravity of the porous body is much smaller than the ratio of the molten metal of the second metal, it is necessary to place the porous body in the mold. When the molten metal of the second metal is poured into the post mold, the porous body 71 may float or tilt due to the fluidity of the molten metal and the difference in ratio between the porous body and the molten metal. Otherwise, the alloy may not be formed at a predetermined position in the mold, or the porous body may hit the inner wall surface of the mold and break off. There is. This problem is solved by placing the porous body 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. This is especially true when it is placed. In addition, in order to avoid the occurrence of such problem 111, the porous body made of the first metal is directly fixed to the inner wall surface of the mold by press-fitting, etc., but the permeability of the first metal is deteriorated. Otherwise, problems arise in that the portion of the porous body that comes into contact with the mold is crushed and stiff, and cracks occur in the porous body.

Purpose of invention Non-invention number, 11? In the method for manufacturing the proposed alloy,
In view of the above-mentioned problems, it is impossible for such problems to occur. The purpose is to provide

The object of the invention is to provide a method for producing an alloy consisting of a first metal having a melting point lower than that of the first metal. , forming a porous body made of the first metal, arranging the porous body in the mold, and arranging a perforated holding element on and in contact with the porous body;
By locking the holding element at its peripheral edge to the inner wall surface of the mold, draining the molten metal of the second metal into the mold, and allowing the molten metal to permeate into the porous body. A method for producing an alloy that avoids alloying one metal and the second metal is achieved.

Effects and Effects of the Invention According to the present invention, the porous body disposed in the mold is displaced relative to the fr mold by the perforated holding element that is in contact with the mold and is secured to the inner wall surface of the mold at the peripheral edge. Therefore, even when the specific gravity of the porous body and the specific gravity of the molten metal of the second metal are very different, the molten metal of the second metal is prevented from being in the mold. At the stage of being lagooned, the porous body is injected into the mold - C) ゛ 2 upper - 7 I stiffness 1 - without cracking, this (, 2 more porous v' (1 wood loss etc. occurs) In particular, a desired alloy can be manufactured in a predetermined area within the casting 7% lI.

In the method for producing an alloy according to the present invention, any of the metal elements or alloys of the first metal number and the second metal number may be used, and the porous body may be the V) powder of the first metal. , compression molding or suction molding of discontinuous fibers, chips, foil pieces, or mixtures thereof, bundles of continuous fibers or thin wires of the first metal, laminates of foils or thin plates, etc. The porous retaining element used in the process for producing the alloy according to the invention also has a porosity sufficient to allow the molten metal of the second metal to pass through it and to compensate for the buoyant forces acting on the porous body. The second metal of the IC is also made of a material with a much higher melting point than the second metal. Preferred examples include wire mesh, perforated metal plates, and molded bodies of various inorganic short fibers.

Example 1 First, as shown in FIG. 1, a compression molding mold was prepared, including a mold body 2 with a cylindrical hole 1, and an upper bunch 3 and a lower bunch 4 that fit into the hole 1. . Next, as shown in FIG. 1, 47.2 g of pure nickel (99.0% pure powder) having an average particle size of 15 μ- The upper bunch 3 is fitted into the hole 1, and the upper bunch 3 and the lower bunch 4 are pressed in the direction toward each other using a press device (not shown in the figure).The bulk density is 4, A cylindrical compression molded body 5 having a diameter of 30 u+m and a length of 15+ am was formed.

Next, although not shown in the figure, the compression molded body 5 is preheated to 600°C in an argon gas atmosphere, and then the compression molded body 5 is placed in a mold 7 at 300°C as shown in FIG. did. Next, stainless steel LIIS standard S US
304) wire mesh (opening size 2n+m)
A retaining plate 8 with a diameter of 42 nm+m is placed on the compression molded body 6, and the outer edge is formed into a ring made of stainless steel (JIs standard 5U8304) with a diameter of 31 mm. The holding plate was fixed by press-fitting it into the inner wall surface 9 of 7.

Then, as shown in Figure 3, 300 cc was placed in the mold.
1 g of pure aluminum (purity 99.7%) was poured into a hot water bath at 800°C. In this case, the pure aluminum molten metal 10 was placed on the holding plate 8 due to its surface tension and maintained in the Iζ state. Next, as shown in FIG.
Pressure was applied with a pressure horn of k(]/cm', a part of the molten metal 10 was moved below the holding plate 8, and the pressurized state was maintained until the molten metal was completely solidified.The molten metal was completely solidified. After that, the solidified rice was removed from the mold 7 using the knockout bottle 12. When the solidified rice was cut along the axis, the Ni-A1 alloy with the desired uniform structure was retained. It was formed at a predetermined position below the plate 8, and no defects such as chipping 10 in the compression molded body were observed.

The composition of the Ni-A1 alloy molding formed as described above was Ni-23, 3%A1.

Example 2 21.80 Cu-Zn [fibers (C1-40%Zn) having an average fiber diameter of 80 μm and an average fiber length of 3 mm, the fibers (C1-40% Zn) are oriented substantially three-dimensionally randomly, and the fiber density is 2.06
A compression molded body of a/cc is formed, the compression molded body is preheated to 4.00°C, an aluminum alloy <J [S standard A C4,0) is used as the molten metal of the second metal, and the hot water temperature is and the pressure applied to the molten metal was 720°C and 75°C, respectively.
A CIJ-ZIT-A1 alloy was produced in the same manner as in Example 1 above, except that it was set to 0 k (1/').

In this example as well, CIJ was used to achieve the desired uniform structure.
-7n-A1 alloy was formed at a predetermined position below the retaining plate, and no defects such as loss of the compression molded body were observed. Note that Cu-Zr+-A produced in this example
Macro composition of 1 alloy is △1-30.2%CI+-20
, 2% Z11.

Example 3 Powder of 30.5 (+ purity 1-1 μm (purity 99.0%)) with an average particle size of 2 μn1 has a bulk density of 2.88 g/c
A compression molded body c was formed, and the compression molded body was preheated to 500°C, and the holding plate had a diameter of 42 mm, a thickness of 1.5 mm, and had about 100 small holes with a diameter of 2 mm. Example 1 as described above, except that a steel plate was used, a molten metal of pure magnesium (pure IJ! 99.2%) was used as the molten metal of the second metal, and the temperature of the molten metal was set at 700°C. Or-M (1 alloy) was produced in the same manner as in the case of .

In this example, the C+゛-M(+ alloy) was formed at a predetermined position below the retaining plate, and no defects such as cracks in the compression molded body were observed. won.

The C1.--Mg alloy fabric made in this example had an M content of 0r-26.8%.

Example 4 24. The average particle size is 40 μm. A compression molded body having a bulk density of 2.27 1/cc was formed from pure decnium powder of 'lCI, and the compression molded body was preheated to /100°C and held with a holding plate as shown in FIG. A square with a thickness of 1.5 mm and 9 holes 8a with a diameter of 5 mtn placed at each 1n point, the midpoint of each side, and the center of a square of 22 tnm in diameter.
Stainless steel with a diameter of 42 mm (JIS standard SUS
A retaining plate 8[) formed of 305) is used,
Pressure force on molten pure aluminum is 1500kg/
An 11-A1 alloy was produced in the same manner as in Example 1 above, except for the following points.

In this embodiment, the pure △1 molten metal poured into the casting passed through the hole 8a of the holding plate 8b and flowed below it due to its own gravity. In this example as well, the 1-i-A1 alloy with the desired uniform M1 weave was formed at a predetermined position below the retainer plate 11, and no defects such as defects in the compression molded body were observed. Ta.

The macroscopic composition of the Oi-Δ1 alloy produced in this example was Ti-37, 3% A1.

Example 5 Using a compression mold similar to that used in Example 1 above, a 20.4 (+) aluminum alloy (with an average fiber diameter of 80 μm and an average fiber length of 3 mm) was prepared.
J Is standard ΔC4G > fibers oriented substantially three-dimensionally randomly, diameter 40 mm, length 30III11
A cylindrical compression molded body 131 was formed.

Next, although not shown in the figure, the compression molded body 13 is preheated to 400° C. in an argon gas atmosphere, and then the pressurizing chamber 14a and the molding chamber 14b are heated to V as shown in FIG.
It was placed in the molding chamber 1411 of the i'J mold 14. Next, the pressurizing chamber 14 is placed in contact with the upper end of the compression molded body 13.
An aluminum alloy (J
ISJJ name 804) Arrange the retaining plate 15, and -
The holding plate 15 was fixed by press-fitting the peripheral edge thereof into the inner wall surface of the pressurizing chamber 14a. In this case, the holding plate 15 is the ninth
1114 mm straight in its center as shown in the figure.
Holes of diameter InIIm spaced apart from each other with a distance between centers of 5II1m on the circumference of , and holes of diameter 4Il spaced apart from each other with a center distance of 11f and 10mm on the circumference of diameter 28IIllll.
A hole 15a having a shape where the hole 1Ill is connected with a tangent line 4f tt
What were you doing with the eight?

Next, as shown in FIG.
48 and 500 cc in the molding chamber 14b, lagoon E50
A molten metal 16 of pure 111jlf (99.3% pure U) at 0°C is poured, and the molten metal is pressurized at a pressure of 1000 kg/am' with a plunger 17 as shown in Fig. 8. The condition was maintained until the molten metal completely solidified.

After the molten metal was completely solidified, the solidified material was taken out from the #R mold 14 in a knockout bottle 18. When the solidified body is cut along the axis...i L, /j, a Zo-Al alloy having a desired uniform structure is formed at a predetermined position in the molding chamber 14b below the holding plate 15. No defects such as defects in the compression molded product were observed. The macroscopic composition of the Zn-Al alloy produced in this example is Zl.
It was 1 to 1-8,6%.

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 the drawing]

Figures 1 to 4 are exploded sectional views showing the manufacturing process of an embodiment of the method for manufacturing an alloy according to the present invention, and Figure 5 is a cross-sectional view of an embodiment of the method for manufacturing an alloy according to the present invention. Figures 6 to 8 show the holding plate used in the process, and Figures 6 to 8 show the manufacturing process of another embodiment of the method for manufacturing an alloy according to the present invention. The figure is a plan view of the retaining plate used in the embodiment shown in FIGS. 6 to 8. 1... Hole, 2... Mold body, 3... Upper punch,
4... U abunch, 5... Compression molded body, 7... Mold, 8... Holding plate, 9... Inner wall surface, 10... Molten metal of pure aluminum. 11... Plunge +-, 12... Knockout bottle, 13... Compression molded body, 14... Mold, 14a...
- Pressurized chamber. 14b... Molding chamber, 15... Holding plate, 16... Molten metal of pure JIF lead, 17... Plunger, 18... Knockout bottle special 8' Reason
Person Patent Attorney 1 Akira? i Takeshi Masa Figure 1 Figure 3 Figure 4 Figure 6 Figure +4n Figure 7 Figure 8

Claims (1)

[Claims] 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, forming a porous body made of the first metal; is placed in the mold, a right hole holding element is placed on the porous body in contact with the right hole holding element, and the right hole holding element is locked to the inner wall surface of the mold at its peripheral edge; A method for producing an alloy, comprising pouring a molten metal of the second metal into the mold and allowing the molten metal to permeate into the porous body, thereby alloying the first metal and the second metal.