CN217166408U

CN217166408U - Alloy slow-setting casting die

Info

Publication number: CN217166408U
Application number: CN202220525287.XU
Authority: CN
Inventors: 何俊; 聂东红; 徐定能; 陈卫平; 周晶晶; 申庆飞
Original assignee: Hunan Oriental Scandium Co ltd
Current assignee: Hunan Oriental Scandium Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-08-12
Anticipated expiration: 2032-03-10

Abstract

The utility model discloses an alloy slow setting casting mould, which comprises a die, the mould is including being located the sprue gate at mould top, on the outer wall of mould from last to encircleing respectively down and being provided with cooling device and heating device. The utility model discloses cooling rate, cooling device position and heating device heating power adjustment temperature field temperature gradient, temperature field height are adjusted to the accessible, and the speed of delaying coagulation of different regional alloy fuse-element in the control mould lets partial alloy phase appear in the process of delaying coagulation, subsides, gathers to the ingot casting bottom, has realized the enrichment of scandium in the ingot casting bottom region.

Description

Alloy slow-setting casting die

Technical Field

The utility model relates to a casting mould technical field, especially an alloy slow setting casting mould.

Background

With the improvement of aerospace, rail transit and 3D printing technologies, the demand for scandium-containing aluminum alloy sections, wires and powder materials is increased year by year, and the demand for aluminum-scandium master alloy is also increased synchronously. The aluminum-scandium master alloy with the scandium content of 10 wt% or more is prepared by aluminum-scandium counter-doping vacuum melting, metal scandium reduced by a calcium-thermal method can be used for aluminum-scandium counter-doping vacuum melting only by subsequent distillation and purification for a plurality of times, the production and preparation flow is long, the number of vacuum equipment is large, the operation difficulty is high, the production efficiency is low, the yield is low, the process controllability is poor, and the cost is high.

The preparation of the high-scandium aluminum-scandium intermediate alloy by aluminum-scandium counter-doping vacuum melting relates to vacuum equipment, has more processes, large equipment investment, complex operation and high energy consumption, and aims at solving the problems by specially providing an alloy retarding casting die.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, to prior art not enough, provide an alloy slow setting casting mould, simplify the preparation process of aluminium scandium intermediate alloy, reduce energy consumption and cost.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides an alloy delayed coagulation casting mould, includes the mould, the mould is including being located the casting gate at mould top, from last to encircleing respectively down on the outer wall of mould and being provided with cooling device and heating device, cooling device is recirculated cooling water tank.

Further, the cooling device is arranged close to the casting opening, and the heating device is arranged at the middle lower part of the mold.

Further, the heating device is a resistance heating sleeve.

Further, the upper end of the cooling device is 10-100mm away from the casting opening. And establishing a low-temperature area in the upper area of the die, and quickly cooling the cast ingot molten alloy.

Further, in order to keep the bottom of the mold warm and reduce heat dissipation, a heat preservation base is sleeved on the outer side of the bottom of the mold, and the heating device is closely adjacent to the upper end of the heat preservation base.

Further, in order to facilitate demolding, the mold comprises a barrel and a base, an inner cavity of the barrel is in a horn shape with a small upper part and a large lower part, the base is connected with a groove at the lower end of the barrel, and an opening at the upper end of the barrel is a casting opening.

Further, in order to facilitate demoulding, the included angle between the inner wall of the cylinder and the vertical direction is 1-2 degrees.

Further, in order to prevent the cooling device from taking away the heat of the casting funnel, the upper end of the mold is sequentially provided with a heat insulation ring and the casting funnel from bottom to top, and the casting funnel is communicated with the casting opening.

Further, a support is arranged on the outer wall of the mold, and the cooling device and the heating device are both fixed on the support.

The utility model discloses a theory of operation:

when the mold works, the heating device heats the middle-lower area of the mold, the heat preservation base preserves heat of the bottom of the mold, a high-temperature area is formed in the lower area of the mold, the cooling device cools the upper part of the mold, and a low-temperature area is formed in the middle-upper part of the mold, so that a stepped temperature field with gradually reduced temperature is established from the bottom of the mold to the upper area along the longitudinal direction of the bottom of the mold. And injecting an aluminum-scandium alloy melt prepared by aluminothermic reduction into the mold through a water gap of a casting funnel, wherein under the action of a temperature field, the alloy in the low-temperature area at the middle upper part of the mold is preferentially solidified and gradually solidified towards the bottom, and the alloy in the high-temperature area at the bottom of the mold can keep a molten state within a certain time. And Al in the alloy ₃ The Sc phase is a first precipitated phase, and is precipitated, aggregated, grown and precipitated firstly in the cooling process to precipitate Al ₃ The Sc phase is settled and enriched under the action of gravity in the solidification processCollects to the bottom of the mold and the rest of the metal and impurities remain in the upper part of the mold.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

1. the utility model discloses in, the ingot casting bottom is through saw cutting, detecting, but direct batching is used for the high aluminium scandium master alloy that contains scandium volume of vacuum melting preparation, has reduced metal scandium distillation purification process, need not use vacuum distillation equipment.

2. The utility model discloses in, adopt cooling device, heating device, established low temperature region, high temperature region respectively in the upper and lower part region of mould, cooling rate, cooling device's position and heating device heating power adjustment temperature field temperature gradient, temperature field height are adjusted to the accessible, and different regional alloy fuse-element slow setting speeds in the control mould let Al ₃ And the Sc phase is separated out, settled and gathered to the bottom of the ingot in the retarding process, so that scandium is enriched in the bottom area of the ingot.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic axial sectional view according to an embodiment of the present invention.

Fig. 3 is a schematic view of a pouring funnel according to an embodiment of the present invention.

Fig. 4 is a sectional view of the mold according to an embodiment of the present invention.

Fig. 5 is a schematic view of a bracket structure according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a cooling device according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of a heating device according to an embodiment of the present invention.

Illustration of the drawings:

1-casting funnel, 11-casting funnel water gap, 2-heat insulation ring, 3-cooling device, 31-water inlet, 32-water tank, 33-water outlet, 4-mould, 41-cylinder, 42-base, 5-heating device, 51-temperature measuring hole, 52-heat insulation sleeve, 53-power supply binding post, 54-resistance wire, 6-temperature measuring couple, 7-heat insulation base, 8-bracket, 81-flange plate, 82-bracket base, 83-fastening nut, 84-threaded support rod

Detailed Description

Referring to fig. 1-3, an alloy delayed coagulation casting mold comprises a mold 1, a heating device 5, a cooling device 3, a heat preservation base 7 and a support 8, wherein as shown in fig. 5, the heat preservation base 7 is placed on a support base 82, the mold 1 is nested in the heat preservation base 7, a resistance heating sleeve 5 is fixed on the lower area of the support 8, and a circulating cooling water tank 3 is fixed on the upper area of the support 8.

As shown in fig. 4, the mold 4 is composed of a cylinder 41 and a base 42, is made of three-high graphite isostatic pressing, and is made of a heat-insulating material to slow down the solidification speed. In order to facilitate demoulding, the inner cavity of the cylinder 41 is in a horn shape with a small upper part and a large lower part, the inner cavity of the cylinder 41 has a drawing angle of 1-2 degrees, the bottom of the cylinder 41 is in a step shape, the inner cavity of the base 42 is in a groove shape, and the cylinder 41 and the base 42 are connected into a whole. The inner cavity of the heat preservation base 7 is groove-shaped, and the bottom of the mold 4 is embedded in the groove of the heat preservation base 7.

As shown in figure 7, the heating device 5 adopts a resistance heating sleeve which is fixed at the lower part of the bracket 8 by flange sheets 81 and 83 fastening nuts, the position of the resistance heating sleeve can be adjusted, the built-in resistance wire 54 is connected with an external control power line and a temperature controller through a binding post 53, the temperature measuring couple 6 is inserted into the temperature measuring hole 51, the end of the temperature measuring couple 6 is closely attached to the mold 4, and a signal wire of the temperature measuring couple 6 is externally connected with the temperature controller.

As shown in fig. 6, the cooling device 3 is installed at a distance of 50mm from the top of the mold 4, the cooling device 3 adopts a circulating cooling water tank, the circulating cooling water tank is fixed on the upper portion of the support 8 through flange pieces 81 and 83 fastening nuts, the position of the circulating cooling water tank is adjustable, the water inlet 31 is connected with an external water supply pipe, and the water outlet 33 is connected with an external drain pipe.

The casting funnel 1 is arranged on the upper part of the bracket 8, and in order to prevent the water tank from taking away the heat at the bottom of the casting funnel 1, the heat insulation ring 8 is used for separating the casting funnel 1 from the circulating cooling water tank 3.

When the device works, 1-2 hours before alloy casting, the resistance heating sleeve 5 is electrified to heat the middle lower part area of the die 4, heating parameters are controlled by an external temperature controller, and a temperature measuring couple 6 in a temperature measuring hole 51 feeds the heating temperature back to the external temperature controller. The heat preservation base 7 is arranged at the bottom of the mould 4 and plays a role in preserving heat of the bottom of the mould 4And (4) acting. The resistance heating sleeve 5 is used for heating and the heat insulation base 7 is used for heat insulation and preservation, and a high-temperature area is formed in the lower area of the die 4. The circulating cooling water enters the water tank 32 through the water inlet 31 and is discharged out of the water tank through the water outlet 33, the upper area of the mold 4 is indirectly cooled by the circulating cooling water tank 3, and the pressure and the flow of the cooling water are controlled by the external pipe valve. Under the indirect cooling action of the heating of the resistance heating jacket 5 and the circulating cooling water tank 3, a temperature field with gradually reduced temperature is formed from the bottom in the die 4 upwards along the axial direction, and the temperature distribution state in the temperature field can be adjusted by adjusting the heating temperature of the resistance heating jacket 5, the circulating water flow of the circulating cooling water tank 3 and the elevation position of the circulating cooling water tank 3. The aluminum scandium alloy melt prepared by aluminothermic reduction is injected into the mould 4 through a pouring funnel water gap 11. Under the action of the temperature field, the alloy in the low-temperature area at the upper part of the die 4 is preferentially solidified, the alloy is gradually solidified downwards along the axial direction of the die 4, and the alloy at the bottom of the die 4 is finally solidified into a solid. Al in Al-Sc alloy ₃ The Sc phase is a first precipitated phase, and Al is a first precipitated phase in the gradual solidification process of the alloy along the axial direction of the die 4 ₃ Sc will precipitate, aggregate and grow up first, Al ₃ The Sc phase sinks to the bottom of the die 4 under the action of gravity, and a scandium-rich end is formed at the bottom of the ingot.

The above description is only for the preferred embodiment of the present invention, and it should not be construed that the embodiment of the present invention is limited to these descriptions, and any other embodiments that can be obtained by those skilled in the art without departing from the technical scope of the present invention should be covered by the present invention.

Claims

1. The utility model provides an alloy delayed coagulation casting mould, includes mould (4), mould (4) are including being located casting gate (43) at mould (4) top, its characterized in that, from last to encircleing respectively down on the outer wall of mould (4) and being provided with cooling device (3) and heating device (5), cooling device (3) are circulation cooling water tank.

2. The alloy retarded casting die according to claim 1, wherein said cooling means (3) is disposed immediately adjacent to said casting gate (43), and said heating means (5) is disposed in the middle-lower portion of said die (4).

3. The alloy retarded casting mold according to claim 1, characterized in that the heating means (5) is a resistance heating mantle.

4. The alloy retarded casting die according to claim 1, characterized in that the upper end of the cooling device (3) is 10-100mm from the casting gate (43).

5. The alloy slow-setting casting die as claimed in claim 1, wherein a heat-insulating base (7) is sleeved on the outer side of the bottom of the die (4), and the heating device (5) is installed close to the upper end of the heat-insulating base (7).

6. The alloy slow-setting casting die according to claim 1, characterized in that the die (4) comprises a cylinder (41) and a base (42), the inner cavity of the cylinder (41) is in a trumpet shape with a small upper part and a large lower part, the base (42) is in groove joint with the lower end of the cylinder (41), and the upper end opening of the cylinder (41) is the casting opening (43).

7. The alloy retarded casting mold according to claim 6, wherein the angle of the inner wall of the cylinder (41) to the vertical is 1-2 °.

8. The alloy retarding casting die according to any one of claims 1 to 7, wherein the upper end of the die (4) is provided with a heat insulation ring (2) and a casting funnel (1) in sequence from bottom to top, and the casting funnel (1) is communicated with the casting opening (43).

9. The alloy delayed coagulation casting die according to any one of claims 1 to 7, wherein a bracket (8) is arranged on the outer wall of the die (4), and the cooling device (3) and the heating device (5) are both fixed on the bracket (8).