CN217492625U - A dual-function casting mold of electromagnetic heating and water cooling - Google Patents

Abstract

The utility model relates to an electromagnetic heating and difunctional casting die of water-cooling belongs to casting method technical field. The electromagnetic heating and water cooling dual-function casting mold comprises a base, an ingot mold body, a pouring pipe and a riser, wherein the ingot mold body and the pouring pipe are installed on the base, the riser is installed above the ingot mold body, and the electromagnetic heating and water cooling dual-function casting mold is characterized in that a spiral water channel is arranged inside the wall of an ingot mold shell of the ingot mold body, and a spiral copper pipe A heated by electromagnetic induction is arranged on the outer side of the ingot mold shell. Meanwhile, the method for using the electromagnetic heating and water cooling dual-function casting mold is also disclosed. The mold can obtain consistent inner and outer crystal grains, and the size of the crystal grains is controlled within a fine range of 500-1000 microns. The inconsistency and coarseness of the crystal grains of the final product caused by the difference between the inside and the outside of the crystal grains are avoided.

Description

A dual-function casting mold for electromagnetic heating and water cooling

technical field

The utility model relates to an electromagnetic heating and water cooling dual-function casting mould and a casting method, belonging to the technical field of casting methods.

Background technique

Metal targets are one of the core materials used in the semiconductor field, especially large-tonnage targets (above 1000kg). At present, there are some problems with domestic targets: 1. The purity of the bulk metal usually only reaches 4N, 100ppm impurity content It has great instability; 2. Conventional open smelting cannot precisely control the oxygen content, nor can it remove volatile impurities; 3. Due to the huge size of the ingot, the core continues to be high temperature after casting, and the ingot of more than 1000kg is cast after casting. The core is still in liquid state within 2 hours, and the grains continue to grow, resulting in a huge grain size of the core, which can reach centimeter-level grains, and also causes a huge difference in the size of the inner and outer grains; Pollution.

The casting molds currently used have the following problems: 1. The molds need to be baked before use, such as copper casting, and the molds need to be baked to 380-400°C with a baking oven; 2. In the operation of the vacuum furnace, due to the need to bake the molds, It is necessary to set up double chambers, and the mold can be hung into the ingot mold chamber after drying, which is time-consuming and labor-intensive, and the thermal efficiency of the natural gas drying bag is still low; 3. The ingot mold body needs to be made very thick, increasing the latent heat, and the cooling rate is minimally improved; 4. The mouth cannot be heated, which will result in a deep shrinkage of the spindle, and the shrinkage cannot be used and needs to be removed, resulting in a decrease in the yield.

In order to solve the problems existing in the existing casting molds when casting large-tonnage targets, those skilled in the art have been studying and improving the casting molds.

Utility model content

Aiming at the problems existing in the prior art, a dual-function casting mold of electromagnetic heating and water cooling is provided, and a corresponding casting method is designed based on the designed casting mold.

The utility model solves the above-mentioned technical problems through the following technical solutions:

An electromagnetic heating and water-cooling dual-function casting mold includes a base, an ingot mold body and a pouring tube installed on the base, and a riser above the ingot mold body. A spiral water channel is arranged inside the shell wall of the mold shell, the inlet and outlet of the water channel are arranged on the ingot mold shell, and a spiral copper tube A heated by electromagnetic induction is arranged on the outside of the ingot mold shell.

On the basis of the above-mentioned technical solutions, the application makes the following improvements and improvements to the above-mentioned technical solutions:

Further, the outer side of the riser shell of the riser is provided with a spiral copper tube B heated by electromagnetic induction.

Further, a spiral copper tube heated by electromagnetic induction is arranged on the outer side wall of the pouring tube.

Further, a spiral copper tube heated by electromagnetic induction is arranged on the outer side wall of the base, and a helical water channel is arranged inside the shell wall of the base.

Further, the base is provided with an ingot mold body mounting groove and a pouring pipe mounting groove, and a flow channel is provided between the ingot mold body mounting groove and the pouring pipe mounting groove.

The electromagnetic induction heating spiral copper tube, spiral copper tube A and spiral copper tube B have corresponding inlets and outlets.

A casting method using electromagnetic heating and water cooling dual-function casting mould is characterized in that, comprising the following steps:

Step 1. Preheating: When the smelting is about to be poured, the electromagnetic induction heating is turned on, and the spiral tube A on the ingot mold body, the spiral copper tube B on the riser, the spiral copper tube on the pouring tube, and the spiral copper tube on the base are heated. Conduct electromagnetic induction heating to heat the mold to 0-00°C to ensure the surface quality of the ingot after casting, because the continuous adjustability and temperature monitoring of the electromagnetic heating can control the temperature range very accurately and fluctuate within a small range, control High quality and consistency of surface quality of ingots in different heats;

Step 2, casting, different materials control the temperature of the melt to be 80-150 ℃ above the melting point for casting, and the casting speed is controlled within 10-90s according to the composition and capacity to complete the casting, and the molten metal is injected from the pouring tube. The molten metal is injected into the ingot mold body through the runner on the base, and the bottom casting process helps to fill the melt and reduce defects;

The above table is: different materials control the temperature of the melt.

Step 3, the casting is completed, the surface is solidified in 10 minutes, and the feeding at the riser at the top of the ingot is completed, and the electromagnetic induction heating is stopped. 0.5MPa or more) high flow rate, improve heat exchange and enhance cooling temperature gradient, and at the same time, pass water into the water channel with a water pressure of more than 0.5MPa, forming a continuous cold source. The double-channel high-pressure and high-flow cooling channel can provide a temperature gradient of 50-80°C/mm from the outer wall of the ingot mold to the inner wall, which promotes rapid internal crystallization, so that the internal grains will not grow too large, and the inside and outside are consistent.

The electromagnetic heating and water cooling dual-function casting mold and casting method designed in this application have the following advantages:

1. The riser of the mold, the body of the ingot mold, the base and even the casting tube are equipped with electromagnetic induction heating spiral copper tubes. The whole set of molds can be assembled as a whole when the furnace is initially installed. In this case, one cavity of the vacuum furnace is enough. ;

2. When the smelting is about to be cast, the electromagnetic induction heating of the coil is turned on, and the mold is heated to 380-400 ° C to ensure the surface quality of the ingot after casting. Because of the continuous adjustability and temperature monitoring of electromagnetic heating, the temperature range can be very accurately controlled to fluctuate within a small range, and the high quality and consistency of the surface quality of the ingots in different heats can be controlled;

3. After 10 minutes after the casting is completed, the surface is solidified, and the electromagnetic induction heating is stopped. At the same time, the inside of the induction coil continues to flow and the water pressure and high flow rate are increased to form a continuous cold source, which promotes rapid internal crystallization, so that the internal grains will not grow too large. , at the same time, the inside and outside are consistent; the inner and outer grains are consistent to reduce the difficulty of subsequent forging and crushing; the inner and outer grains are obtained, and the grain size is controlled within a small range of 500-1000 microns, avoiding the difference between the inner and outer grains of the final product. Inconsistent and coarse grains.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of a kind of electromagnetic heating and water-cooling dual-function casting mould of the application;

Fig. 2 is the front view of Fig. 1;

3 is a cross-sectional view of an ingot mold body;

Figure 4 is a schematic diagram of the structure of the riser.

Reference numerals are recorded as follows: base-1, ingot mold body-2, pouring tube-3, riser-4,

Ingot mold shell-2.1, water channel-2.2, spiral copper tube A-2.3, riser shell-4.1, spiral copper tube B-4.2.

Detailed ways

The following embodiments in conjunction with the accompanying drawings are only intended to illustrate the technical solutions described in the claims, and are not intended to limit the protection scope of the claims.

In conjunction with accompanying drawing 1-4, a kind of electromagnetic heating and water-cooling dual-function casting mold, including base 1, ingot mold body 2 and pouring pipe 3 installed on base 1, and the riser 4 above the ingot mold body 2 is installed, A spiral water channel 2.2 is arranged inside the shell wall of the ingot mold shell 2.1 of the ingot mold body 2, and a spiral copper tube A2.3 heated by electromagnetic induction is arranged on the outside of the ingot mold shell 2.1;

Wherein, the outer side of the riser shell 4.1 of the riser 4 is provided with a spiral copper pipe B4.2 heated by electromagnetic induction;

The outer side wall of the pouring pipe 3 is provided with a spiral copper pipe heated by electromagnetic induction;

The outer side wall of the base 1 is provided with a spiral copper tube heated by electromagnetic induction, and a helical water channel is arranged inside the shell wall of the base 1; and the base 1 is provided with an ingot mold body installation groove and a pouring pipe installation groove , a flow channel is arranged between the installation groove of the ingot mold body and the installation groove of the pouring pipe.

The casting method of the above-mentioned electromagnetic heating and water-cooling dual-function casting mould comprises the following steps:

Step 1. Preheating: When the smelting is about to be cast, turn on the electromagnetic induction heating, and heat the spiral tube A2.3 on the ingot mold body 2, the spiral copper tube B4.2 on the riser 4, and the spiral on the pouring tube 3. The copper tube and the spiral copper tube of the base 1 are heated by electromagnetic induction, and the mold is heated to 380-400 ° C to ensure the surface quality of the ingot after casting, because the continuous adjustability and temperature monitoring of the electromagnetic heating can control the temperature range very accurately Fluctuate in a small range, control the high quality and consistency of the surface quality of the ingots in different heats;

Step 2, casting, different materials control the temperature of the melt to be 80-150 ℃ above the melting point for casting, and the casting speed is controlled within 10-90s according to the composition and capacity to complete the casting, and the molten metal is injected from the pouring tube. The molten metal is injected into the ingot mold body 2 through the flow channel on the base, and the bottom casting process helps to fill the melt and reduce the occurrence of defects;

Step 3: After the casting is completed, after 10 minutes the surface is solidified, the electromagnetic induction heating is stopped. At the same time, the inside of the electromagnetic induction heating spiral copper tube continues to flow and the water pressure is increased (the pressure is increased from 0.2MPa to more than 0.5MPa) and the high flow rate increases the heat exchange. The cooling temperature gradient is enhanced, and at the same time, water is passed into the water channel, and the water pressure is above 0.5MPa, forming a continuous cold source. The double-channel high-pressure and high-flow cooling channel can provide a temperature gradient of 50-80°C/mm from the outer wall of the ingot mold to the inner wall, which promotes rapid internal crystallization, so that the internal grains will not grow too large, and the inside and outside are consistent.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (5)

1. The utility model provides an electromagnetic heating and water-cooling difunctional casting die utensil, includes base (1), all installs ingot mould body (2) and pouring tube (3) on base (1) to and installation ingot mould body (2) top rising head (4), its characterized in that, the inside spiral helicine water course (2.2) that is provided with of conch wall of ingot mould casing (2.1) of ingot mould body (2), the outside of ingot mould casing (2.1) sets up electromagnetic induction heating's spiral copper pipe A (2.3).

2. The electromagnetic heating and water cooling dual-function casting mold according to claim 1, characterized in that the outside of the riser shell (4.1) of the riser (4) is provided with a spiral copper tube B (4.2) heated by electromagnetic induction.

3. Electromagnetic heating and water cooling dual-function casting mould according to claim 2, characterized in that the outer side wall of the casting tube (3) is provided with a spiral copper tube heated by electromagnetic induction.

4. The electromagnetic heating and water cooling dual-function casting mold according to claim 3, characterized in that the outer side wall of the base (1) is provided with a spiral copper pipe heated by electromagnetic induction, and a spiral water channel is arranged inside the wall of the base (1).

5. The electromagnetic heating and water cooling dual-function casting mold according to claim 4, characterized in that the base (1) is provided with an ingot mold body installation groove and a pouring tube installation groove, and a flow channel is arranged between the ingot mold body installation groove and the pouring tube installation groove.

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