TW201627086A - Titanium-based alloy induction melting bottom leakage type vacuum suction casting device and control method - Google Patents

Titanium-based alloy induction melting bottom leakage type vacuum suction casting device and control method Download PDF

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Publication number
TW201627086A
TW201627086A TW105101200A TW105101200A TW201627086A TW 201627086 A TW201627086 A TW 201627086A TW 105101200 A TW105101200 A TW 105101200A TW 105101200 A TW105101200 A TW 105101200A TW 201627086 A TW201627086 A TW 201627086A
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TW
Taiwan
Prior art keywords
furnace
titanium
cable
alloy
crucible
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TW105101200A
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Chinese (zh)
Inventor
xu-dong Ma
Feng Zhao
Song Zhao
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Beijing Jiayiwansi Science And Technology Dev Co Ltd
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Priority to CN201510024035.3A priority Critical patent/CN104646647B/en
Application filed by Beijing Jiayiwansi Science And Technology Dev Co Ltd filed Critical Beijing Jiayiwansi Science And Technology Dev Co Ltd
Publication of TW201627086A publication Critical patent/TW201627086A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00Pressure casting; Vacuum casting
    • B22D18/06Vacuum casting, i.e. making use of vacuum to fill the mould

Abstract

The invention discloses a titanium-based alloy induction melting bottom leakage type vacuum suction casting device and a control method, relates to the technical field of titanium-based alloy melting suction casting and solves the problems of low efficiency, high cost, complicated technology and the like of an existing titanium-based alloy melting suction casting device. The titanium-based alloy induction melting bottom leakage type vacuum suction casting device provided by the invention can be used for carrying out vacuum induction melting on titanium-based alloy by adopting a ceramic crucible; since no any shielding effect works on an electromagnetic force by ceramic, all electromagnetic induction energy generated by an induction coil can totally act on titanium metal, energy saving and environment protection are realized, the utilization rate of metal raw materials is up to 60%-70%, and the metal cost is greatly reduced; an isolating layer is formed on the inner surface of a crucible body of the ceramic crucible, materials which are used for manufacturing the isolating layer comprise yttrium oxide, the yttrium oxide has good inertia on the titanium metal under high temperature and can be used for isolating ceramic materials which can react with the titanium metal during a melting process, and titanium-based alloy melting is enabled to be reliably proceeded.

Description

Titanium-based alloy induction melting bottom leakage vacuum suction casting device and control method thereof
The invention relates to the technical field of titanium-based alloy smelting suction casting, in particular to a titanium-based alloy induction melting bottom leakage vacuum suction casting device and a control method thereof.
Traditional titanium alloy smelting processes have undergone several stages of variation. First, vacuum arc melting, the principle of this melting method is to use a titanium ingot and a water-cooled copper crucible as positive and negative electrodes, respectively, to melt the titanium ingot by a large amount of heat generated by mutual discharge under a high current state, thereby forming a melting in the crucible. The molten metal is then poured.
Then, vacuum induction melting, the principle is to wrap the induction coil outside the split-type water-cooled copper crucible, and the electromagnetic force generated by the induction coil acts on the metal inside the crucible through the non-metallic isolation between the splits of the copper crucible. The molten metal forms a molten metal inside the crucible and completes the casting.
Both of the above methods must be carried out by water-cooled copper crucibles and form a thick crust, which takes away a large amount of heat, resulting in extremely low actual power usage (only 20% - 30% of the power actually acts on the titanium metal). ). Moreover, the conventional titanium alloy precision casting shell has high requirements for the preparation of the shell, and the number of layers is large, which makes the process complicated and directly increases the investment cost. In the traditional process, the work of a single furnace The working time often takes 60-80 minutes, and at the same time, the labor intensity of the loading furnace is high, and many people need to cooperate, and the process is complicated. In the traditional process, it takes 10 days from the preparation of the wax mold to the cleaning of the shell.
Titanium itself is a kind of highly active metal. In the traditional process, the water-cooling environment needs to be involved in the smelting process. If the smashing occurs, the molten titanium metal will directly contact the water. In a vacuum environment, it will directly Initiating a violent reaction will trigger a hydrogen explosion, which poses a great threat to the safety of life and property. At present, domestic production units of titanium alloys have experienced similar safety accidents and even casualties.
In order to solve the above problems, it is highly desirable to propose a new titanium-based alloy induction melting vacuum suction casting equipment to solve the problems of low efficiency, high cost, complicated process, large workload and difficult preparation of existing titanium-based alloy casting. Shell, long cycle, and potential safety hazards.
The first object of the present invention is to provide a titanium-based alloy induction melting bottom leakage vacuum suction casting device with simple structure, high production efficiency, high utilization rate of raw materials, energy saving and environmental protection.
The second object of the present invention is to provide a control method for a titanium-based alloy induction melting bottom leak vacuum suction molding apparatus with high production efficiency, energy saving and environmental protection.
A third object of the present invention is to provide a ceramic crucible for induction melting of a titanium-based alloy which is energy-saving and environmentally friendly, has a low production cost, and is highly inert to a titanium-based alloy.
A fourth object of the present invention is to provide a method for preparing a ceramic crucible which is simple in process and low in cost.
In order to achieve the above, in one aspect, the present invention adopts the following technical means: a titanium-based alloy induction melting bottom leakage vacuum suction casting apparatus, comprising an outer furnace body and at least one vacuum suction casting device disposed in the outer furnace body, as an outer furnace After the furnace door is closed, the outer furnace body forms a closed space, and the outer furnace body is connected with a vacuum unit; the outer furnace body is further provided with a ceramic crucible for melting the titanium-based alloy, the cavity of the ceramic crucible and the vacuum suction The casting cavity of the casting device is in communication; further comprising an induction coil, wherein the induction coil is energized to generate an electromagnetic force to smelt the titanium-based alloy in the ceramic crucible.
Preferably, the coaxial power feeding system includes a first cable structure and a second cable structure which are insulated from each other; the first cable structure is connected to one end of the power source and the other end is connected to one end of the induction coil; The second cable structure is connected to the negative pole of the power supply at one end and the other end of the induction coil to the other end; the first cable structure and the axis of the second cable structure are coincident; ideally, the first cable structure and the second cable structure are sleeved More preferably, the first cable structure is a tubular structure made of copper, the second cable structure is a tubular structure made of copper, and the outer diameter of the second cable structure is smaller than the inner diameter of the first cable structure. The first cable structure is sleeved outside the second cable structure, and the first cable structure and the second cable structure are connected by an insulating element.
Desirably, the vacuum suction casting device is fixedly connected to the furnace door of the outer furnace body and can move together with the furnace door; ideally, the furnace door of the outer furnace body is of a push-pull type or a flip type; Preferably, the furnace door of the outer furnace body is disposed at the top, the side or the bottom of the outer furnace body; ideally, the coaxial power feeding system supports the induction coil in the outer furnace body, and the ceramic crucible is disposed on the vacuum More preferably, the coaxial power feeding system is fixed on the sidewall of the outer furnace body, and when the furnace door of the outer furnace body is closed, the ceramic crucible is located in the induction coil, or the coaxial electric inlet system For the movable setting, when the furnace door of the outer furnace body is closed, the coaxial electric power feeding system drives the induction coil to move to cover the outer circumference of the ceramic crucible; ideally, the vacuum suction casting apparatus includes an inner furnace body and is disposed on a shell in the inner furnace body and a vacuum unit connected to the inner furnace body, wherein the inner shell is the casting cavity, the inner furnace body has a communication port, and the bottom of the ceramic crucible has a suction port, the suction The casting port is connected to the cavity inlet of the shell through the communication port; ideally, a sealing isolation device is disposed between the ceramic crucible and the inner furnace body, and the dense Isolation means for isolation is formed between the inner and the outer furnace furnace; ceramic crucible by the connecting member connected to the door of the furnace body.
On the other hand, the present invention adopts the following technical means: a control method for the titanium-based alloy induction melting vacuum suction casting apparatus as described above, the method comprising at least the following steps: Step A, pre-assembling the ceramic crucible of the titanium-based alloy material, and vacuum The suction casting device is installed in the outer furnace body, and the furnace door of the outer furnace body is closed; in step B, the outer furnace body is evacuated, and the furnace body is filled with the shielding gas after the vacuuming is completed; step C, energizing the induction coil to perform titanium Smelting of base alloy material; Step D: After smelting for a predetermined time, the vacuum suction molding apparatus is evacuated to perform a suction casting process.
Ideally, in step C, the frequency of energization to the induction coil is 20-50 kHz and the power is 15-50 kW.
In another aspect, the present invention adopts the following technical means: a ceramic crucible for induction melting of a titanium-based alloy, comprising a crucible body and a separator attached to the inner surface of the crucible body, wherein the spacer layer is made of tantalum oxide .
Desirably, the bottom of the crucible has a suction opening, the inner cavity of the crucible has a diameter of 20 to 70 cm, a height of 40 to 150 cm, and the diameter of the suction opening is 5 to 40 cm. Ideally, the inner volume of the crucible is The diameter of the cavity is 30-60 cm, the height is 50-100 cm, and the diameter of the suction port is 10-30 cm. Ideally, the material of the foregoing body of the crucible contains cerium oxide; ideally, the thickness of the foregoing layer It is 0.5-1.5 mm; the thickness of the aforementioned crucible body is 5-15 mm.
In another aspect, the present invention employs the following technical means: a method for preparing a ceramic crucible as described above, the method comprising at least the steps of: step A, providing a wax member; and step B, applying a slurry containing cerium oxide on the wax member, Then, drying is performed to obtain a blank coated with a slurry containing cerium oxide; step C, a slurry containing cerium oxide is coated on the blank obtained in step B, and then dried; step D, step C is repeated after the set number of times The blank is calcined to obtain a finished product.
Desirably, the aforementioned cerium oxide-containing slurry component comprises 40% to 60% oxidation. 钇 and 40%-60% zirconium acetate solution 40%-60%; the composition of the foregoing cerium oxide-containing slurry comprises 40%-70% cerium oxide powder and 30%-60% water; the foregoing step B The thickness of the slurry containing cerium oxide is 0.5-1.5 mm; the thickness of the slurry containing cerium oxide coated in the above step C is 1-2 mm.
Desirably, the calcination temperature in the aforementioned step D is 900-1300 ° C, and the calcination time is 1-3 hours.
The effect of the present invention against the prior art is that the present invention provides a titanium-based alloy induction melting bottom-drain vacuum suction casting apparatus which uses ceramic crucible to vacuum induction melting of a titanium-based alloy. Since the ceramic does not have any shielding against electromagnetic force, the induction coil is produced. All the electromagnetic induction energy can all act on the titanium metal, energy saving and environmental protection, the utilization rate of the metal raw materials is as high as 60%-70%, and the metal cost is greatly reduced; the above titanium-based alloy induction melting vacuum suction casting device provided by the invention The control method is simple in operation, high in work efficiency, low in labor intensity, and eliminates potential safety hazards in the conventional process, so that the melting process of the titanium-based alloy is stable, safe and reliable; the invention provides the induction melting of the titanium-based alloy The ceramic crucible is provided with an isolating layer on the inner surface of the crucible body, and the material of the separating layer contains cerium oxide, which has good inertness to titanium metal at high temperature, does not chemically react with it, and can be melted. Isolation of ceramic materials that may react with titanium during the process to ensure smelting of titanium-based alloys The invention has the advantages of simple process, short production cycle and high production efficiency.
1‧‧‧ furnace bracket
2‧‧‧Outer furnace body
21‧‧‧ furnace door
22‧‧‧First vacuum port
3‧‧‧Vacuum suction casting device
31‧‧‧ inner furnace
311‧‧‧Second vacuum port
312‧‧‧ furnace door
32‧‧‧ shell
4‧‧‧Optical monitoring temperature measuring device
5‧‧‧lifting frame
6‧‧‧ Lifting drive system
7‧‧‧ horizontal moving orbit
8‧‧‧Ceramic 坩埚
81‧‧‧Injection port
9‧‧‧Connecting parts
10‧‧‧Induction coil
11‧‧‧ coaxial power system
111‧‧‧First cable structure
112‧‧‧Second cable structure
113‧‧‧ sleeve
114‧‧‧End cover
115‧‧‧First round table
116‧‧‧Second round table
117‧‧‧Connecting terminal
1 is a schematic structural view showing a titanium-based alloy induction melting bottom leak type vacuum suction casting apparatus according to Embodiment 1 of the present invention; [Fig. 2] is a partial enlarged view of a portion A in Fig. 1; [Fig. 3] illustrates the present invention. The assembly structure diagram of the coaxial power feeding system and the induction coil provided in the first embodiment.
The technical means of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.
Example 1:
The present embodiment provides a titanium-based alloy induction melting bottom leakage type vacuum suction molding apparatus, as shown in FIG. 1 and FIG. 2, the apparatus includes a furnace body support body 1, an outer furnace body 2 supported on the furnace body support 1, and The vacuum suction casting device 3 in the outer furnace body 2. The outer furnace body 2 is provided with an optical monitoring temperature measuring device 4 for monitoring the temperature inside the outer furnace body 2. A first vacuuming port 22 is opened on the side wall of the outer furnace body 2, and a vacuum unit is connected to the first vacuuming port 22. When the furnace door 21 of the outer furnace body is closed, a closed space is formed in the outer furnace body 2, The vacuum unit can evacuate the inside of the furnace body 2.
In the present embodiment, the furnace door 21 of the outer furnace body is disposed at the bottom of the outer furnace body 2. A lifting frame 5 is connected below the furnace door 21 of the outer furnace body, and the lifting frame 5 is driven by the lifting drive system 6, thereby driving the furnace door 21 of the outer furnace body to move up and down to realize opening and closing of the furnace door. Lift drive system 6 settings On the horizontal moving rail 7, when the furnace door 21 of the outer furnace body is opened, the furnace door 21, the lifting frame 5 and the elevation drive system 6 of the outer furnace body are movable along the horizontal moving rail 7. The specific driving mode of the lifting drive system 6 is not limited, and the structure of the stable transmission can be realized, such as a ball screw structure, a cylinder driving structure and the like.
The vacuum suction casting device 3 is fixed to the furnace door 21 of the outer furnace body and is movable therewith. The vacuum suction casting apparatus 3 includes an inner furnace body 31 and a mold case 32 disposed in the inner furnace body 31. The inside of the mold case 32 is a casting cavity. A vacuuming port 311 is opened at the bottom of the inner furnace body 31, and a vacuum unit is also connected to the second vacuuming port 311. The vacuum unit can evacuate the inner furnace body 31. The furnace door 312 of the inner furnace body is disposed at the top of the inner furnace body 31, and the ceramic crucible 8 is fixed to the furnace door 312 of the inner furnace body by the connecting member 9. The specific shape of the connecting member 9 is not limited, and the mounting of the ceramic crucible 8 can be facilitated. The size of the ceramic crucible 8 is adjusted according to the amount of the actual cast metal, and the inner cavity has a diameter of usually 20 to 70 cm, desirably 30 to 60 cm, and a height of usually 40 to 150 cm, desirably 50 to 100 cm. A communication port is opened in the furnace door 312 of the inner furnace body, and a suction port 81 is opened at the bottom of the ceramic crucible 8, and the suction port 81 is connected to the cavity inlet of the shell 32 via the communication port. The size of the suction port 81 can be set according to the size and shape of the casting cavity, and is generally set to 5 to 40 cm, desirably 10 to 30 cm. A seal isolation device is provided between the ceramic crucible 8 and the inner furnace body 31, and the seal isolation device is used to form an isolation between the inner furnace body 31 and the outer furnace body 2. The specific shape of the sealing isolating device is not limited, and it can be set according to the specific shape of the ceramic crucible, and isolation can be achieved. Experiments have shown that the above sizing can achieve the best smelting effect and suction casting effect.
In the present embodiment, the titanium-based alloy in the ceramic crucible 8 is melted by energization of the induction coil 10 to generate electromagnetic force, and the induction coil 10 is disposed in the outer furnace body 2. When the furnace door 21 of the outer furnace body is opened, the inner furnace body 31 moves along with the furnace door 21 of the outer furnace body, thereby moving out of the outer furnace body 2, The casting in the shell 32 is obtained; when the furnace door 21 of the outer furnace body is closed, the inner furnace body 31 moves with the furnace door 21 of the outer furnace body, thereby moving into the outer furnace body 2, and the furnace door 21 of the outer furnace body When the shutdown is completed, the ceramic crucible 8 is located just inside the induction coil 10, facilitating the melting of the titanium-based alloy in the ceramic crucible 8.
Since the smelting process of the titanium-based alloy must be carried out under vacuum, for induction smelting, there must be a corresponding connection from the power source to the induction coil 10, and the conventional cable connection often loses more than 40% of power and frequency. In this embodiment, the coaxial power feeding system 11 is specially designed to overlap the axes of the two cables, thereby completely avoiding the mutual inductance of the cable, reducing the power loss to less than 5%, and reducing the frequency loss to less than 10%. . The coaxial power feeding system 11 is fixedly disposed on the sidewall of the outer furnace body 2, and the induction coil 10 is supported in the outer furnace body 2 by the coaxial power feeding system 11.
As shown in FIG. 3, the coaxial power feeding system 11 includes a first cable structure 111 and a second cable structure 112 that are insulated from each other and an insulating member that connects the first cable structure 111 and the second cable structure 112. The first cable structure 111 is a tubular structure made of copper, one end of which is connected to the positive pole of the power source, and the other end of which is connected to one end of the induction coil 10 via the connection terminal 117; the second cable structure 112 is a cylindrical structure of copper material, and the second cable The outer diameter of the structure 112 is smaller than the inner diameter of the first cable structure 111, the first cable structure 111 is sleeved outside the second cable structure 112, and the axes of the first cable structure 111 and the second cable structure 112 coincide.
The insulating assembly includes a sleeve 113 and an end cap 114. The inner diameter of the sleeve 113 is substantially the same as the outer diameter of the second cable structure 112. The second cable structure 112 is sleeved in the sleeve 113. The sleeve 113 is provided at one end with a first circular table 115 and connected to the first circular table 115. The second circular table 116 has an outer diameter larger than the outer diameter of the first circular table 115 and larger than the outer diameter of the sleeve 113. The end surface of the first cable structure 111 abuts the truncated surface of the second truncated cone 116, and the inner circumferential surface of the first cable structure 111 and the second truncated cone The circumference of 116 matches. Since the outer diameter of the sleeve 113 is smaller than the outer diameter of the first circular table 115, a cavity is formed between the outer circumferential surface of the sleeve 113 and the inner circumferential surface of the first cable structure 111. At the other end of the sleeve 113, the end cap 114 passes through the second cable structure 112 to engage the other end surface of the first cable structure 111 and the other end surface of the sleeve 113, thereby opposing the first cable structure 111 and the second cable structure 112 forms a fixed. The end cap 114 can be in an interference fit or threaded connection with the outer peripheral surface of the second cable structure 112. Both the sleeve 113 and the end cap 114 are made of an insulating material to ensure insulation between the first cable structure 111 and the second cable structure 112. By limiting the position of the first cable structure 111 and the second cable structure 112 by the insulating member, the axes of the two are coincident, thereby avoiding mutual inductance of the cable and reducing energy loss.
The titanium-based alloy induction melting bottom-drain vacuum suction casting device provided by the embodiment adopts ceramic 坩埚8 for vacuum induction melting of titanium-based alloy, and since the ceramic does not have any shielding for electromagnetic force, all electromagnetic induction generated by the induction coil 10 is obtained. The energy can all act on the titanium metal to achieve energy saving and environmental protection. The utilization rate of the metal raw materials is as high as 60%-70%, which greatly reduces the metal cost.
The furnace door 21 of the outer furnace body is not limited to be disposed at the bottom of the outer furnace body 21, and other positions can be conveniently opened and closed, such as the top and side portions of the outer furnace body 21, and the furnace door 21 of the outer furnace body can be It can be set as push-pull type or flip type; the connection manner between the inner furnace body 31 and the furnace door 21 of the outer furnace body is not limited, and may be wall-mounted, bracket type, etc.; an outer furnace body 2 is not limited to being provided with a vacuum suction. The casting device 3 can also be provided with a plurality of vacuum suction casting devices 3 according to the specific requirements of the site; the coaxial power feeding system 11 is not limited to the above structure, and any structure capable of realizing coaxial power feeding to avoid power loss can be used. The electric system 11 can also be arranged to be movable. When the furnace door 21 of the outer furnace body is closed, the coaxial power feeding system 11 drives the induction coil 10 to move to the outer periphery of the ceramic crucible 8.
The specific steps of the above titanium-based alloy induction melting bottom leakage vacuum suction casting equipment are as follows: Step A, starting the lifting drive system 6 to drive the lifting frame 5 to drive the furnace door 21 of the outer furnace body to be closed, thereby loading the ceramic crucible 8 preloaded with the titanium-based alloy material and the vacuum suction casting device 3 into the outer furnace body 2; B. Vacuuming the outer furnace body 2, when the vacuum degree reaches the requirement, the furnace body 2 is filled with a certain pressure of shielding gas. In this embodiment, argon gas is used as the shielding gas; step C, the power source is turned on, and the power is turned on. The electric system 11 energizes the induction coil 10, and performs smelting of the titanium-based alloy material under the action of the induction coil 10; in step D, after smelting for a predetermined time, the second furnace is filled with argon gas, when argon gas After the pressure reaches the requirement, the inner furnace body 31 is evacuated. When the melting is completed, the titanium-based alloy material in the ceramic crucible 8 enters the casting cavity of the shell 32 due to the pressure difference between the inner and outer furnace bodies, and the suction is completed. Casting; Step E, after the completion of the suction casting, cooling, breaking the vacuum, and discharging.
The parameters that do not provide specific values in the above process, such as the vacuum requirement in step B, the shielding gas at a certain pressure, the predetermined time in step D, and the like are the same as those commonly used in the prior art.
Since titanium itself is a metal that is insensitive to electromagnetic induction, in step C, a suitable combination of power and frequency must be found to allow normal melting. The ideal frequency and power range is obtained by a large number of experiments, the ideal range of frequencies is 20-50 kHz, and the ideal range of power is 15-50 kW.
The control method of the titanium-based alloy induction melting bottom leakage vacuum suction casting device provided by the embodiment is simple in operation, high in work efficiency, and can complete a suction casting process in about 3 minutes, thereby reducing labor intensity and eliminating the possibility of occurrence in the conventional process. Safety hazard, making titanium-based alloys The smelting process is stable, safe and reliable. In addition, the device of the embodiment realizes automatic control, which greatly reduces the operation difficulty and labor intensity of the worker, and reduces the personnel requirement of 50% compared with the conventional process under the same capacity.
Embodiment 2:
The present embodiment provides a ceramic crucible for induction melting of a titanium-based alloy, the ceramic crucible comprising a crucible body and a separator attached to the inner surface of the crucible body.
In the present embodiment, the separator is made of cerium oxide, which is highly inert to titanium at high temperatures, does not chemically react with it, and can react with titanium during the smelting process. The ceramic material ensures reliable smelting of titanium-based alloys. The material of the crucible body contains cerium oxide, which can resist possible metal expansion and thermal stress during the smelting process to ensure the strength of the crucible.
The size of the ceramic crucible is adjusted according to the amount of the actual cast metal, and the inner cavity has a diameter of usually 20 to 70 cm, desirably 30 to 60 cm, and a height of usually 40 to 150 cm, desirably 50 to 100 cm. The bottom of the ceramic crucible is provided with a suction casting port. The size of the suction casting port can be set according to the size and shape of the casting cavity, and is generally set to 5 to 40 cm, ideally 10 to 30 cm. Experiments have shown that the above sizing can achieve the best smelting effect and suction casting effect.
The specific thickness of the isolation layer and the crucible body is not limited, and may be set according to the overall size of the crucible and the design requirements. The ideal range of the thickness of the isolation layer is 0.5-1.5 mm, and the ideal range of the thickness of the crucible body is 5-15 mm.
The preparation method of the above ceramic crucible comprises the following steps: step A, providing a wax member of a desired crucible shape; and step B, coating a slurry containing cerium oxide on the wax member, and then drying to obtain a coating. a blank containing a slurry of cerium oxide; step C, applying a slurry containing cerium oxide to the blank obtained in step B, and then drying; step D, repeating the set number of steps C, calcining the blank Get the finished product. In the present embodiment, the calcination temperature is 900-1300 ° C, and the calcination time is 1-3 hours.
Wherein, the slurry component containing cerium oxide is 40%-60% cerium oxide and 40%-60% zirconium acetate solution 40%-60%. The composition of the slurry containing cerium oxide is 40% to 70% of cerium oxide powder and 30% to 60% of water.
The thickness of the slurry containing cerium oxide in step B is 0.5-1.5 mm; the thickness of the slurry containing cerium oxide in step C is 1-2 mm.
The preparation process of the ceramic crucible provided in the embodiment is simple in process, short in production cycle, and high in production efficiency.
The technical principles of the present invention are described above in conjunction with specific embodiments. The descriptions are merely illustrative of the principles of the invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can devise other embodiments of the present invention without departing from the scope of the invention.
1‧‧‧ furnace bracket
2‧‧‧Outer furnace body
21‧‧‧ furnace door
22‧‧‧First vacuum port
3‧‧‧Vacuum suction casting device
5‧‧‧lifting frame
6‧‧‧ Lifting drive system
7‧‧‧ horizontal moving orbit
8‧‧‧Ceramic 坩埚
10‧‧‧Induction coil
11‧‧‧ coaxial power system

Claims (10)

  1. A titanium-based alloy induction melting bottom leakage vacuum suction casting device, characterized in that it comprises an outer furnace body (2) and at least one vacuum suction casting device (3) disposed in the outer furnace body (2), when the outer furnace body After the furnace door (21) is closed, a sealed space is formed in the outer furnace body (2), and the outer furnace body (2) is connected with a vacuum unit; and the outer furnace body (2) is further provided with a titanium alloy for melting. The ceramic crucible (8), the cavity of the ceramic crucible (8) is in communication with the casting cavity of the vacuum suction casting device (3); further comprising an induction coil (10), wherein the induction coil (10) generates electromagnetic force after being energized The titanium-based alloy in the ceramic crucible (8) is smelted.
  2. The titanium-based alloy induction smelting bottom leakage type vacuum suction molding apparatus as claimed in claim 1, further comprising a coaxial power feeding system (11), wherein the coaxial power feeding system (11) comprises a first insulation set a cable structure (111) and a second cable structure (112); the first cable structure (111) has one end connected to the positive pole of the power source, and the other end is connected to one end of the induction coil (10); the second cable structure (112) is connected to the power source at one end. a cathode connected to the other end of the induction coil (10); the first cable structure (111) and the second cable structure (112) are coincident; ideally, the first cable structure (111) and the foregoing The two cable structures (112) are sleeved together; more preferably, the first cable structure (111) is a tubular structure of copper, and the second cable structure (112) is a tubular structure of copper, the second The outer diameter of the cable structure (112) is small In the inner diameter of the first cable structure (111), the first cable structure (111) is sleeved outside the second cable structure (112), and the first cable structure (111) and the second cable structure (112) are Connected together by insulating elements.
  3. The titanium-based alloy induction smelting bottom leakage type vacuum suction casting apparatus according to claim 1 or 2, wherein the vacuum suction casting apparatus (3) is fixedly connected to the furnace door (21) of the outer furnace body and Moving together with the furnace door; ideally, the furnace door (21) of the outer furnace body is of a push-pull type or a flip type; ideally, the furnace door (21) of the outer furnace body is disposed at the top of the outer furnace body (21) , the side or the bottom; ideally, the coaxial power feeding system (11) supports the induction coil (10) in the outer furnace body (2), and the ceramic crucible (8) is disposed in the vacuum suction molding device (3) More desirably, the aforementioned coaxial power feeding system (11) is fixed on the side wall of the outer furnace body (2), and when the furnace door (21) of the outer furnace body is closed, the ceramic crucible (8) is located in the foregoing The induction coil (10) or the coaxial power feeding system (11) is movably arranged, and when the furnace door (21) of the outer furnace body is closed, the coaxial power feeding system (11) drives the induction coil (10). Moving to cover the outer circumference of the ceramic crucible (8); ideally, the vacuum suction casting apparatus (3) includes an inner furnace body (31) and is disposed in the inner furnace body (31). a mold shell (32) and a vacuum unit connected to the inner furnace body (31), wherein the mold shell (32) is the casting cavity, and the inner furnace body (31) is provided with a communication port, the ceramic The bottom of the crucible (8) is provided with a suction casting port (81), and the suction casting port (81) is connected to the cavity inlet of the shell (32) via the communication port; ideally, the ceramic crucible (8) and the foregoing Sealed isolation between inner furnace bodies (31) The device, the sealing isolation device is configured to form an isolation between the inner furnace body (31) and the outer furnace body (2); the ceramic crucible (8) is connected to the furnace door of the inner furnace body by a connecting member (9) (312) Upper.
  4. A method for controlling a titanium-based alloy induction smelting bottom leakage type vacuum suction molding apparatus according to any one of claims 1 to 3, wherein the method comprises at least the following steps: Step A, preloading The ceramic crucible (8) and the vacuum suction casting device (3) of the titanium-based alloy material are placed in the outer furnace body (2), and the furnace door (21) of the outer furnace body is closed; the step B is performed on the outer furnace body (2) Vacuuming, after vacuuming, filling the furnace body (2) with protective gas; step C, energizing the induction coil (10) to smelt the titanium-based alloy material; step D, smelting for a predetermined time, vacuum The suction casting device (3) is evacuated to perform a suction casting process.
  5. The method for controlling a titanium-based alloy induction melting bottom leak type vacuum suction casting apparatus according to claim 4, wherein in step C, the frequency of energizing the induction coil (10) is 20-50 kHz, and the power is 15 -50kW.
  6. A ceramic crucible for induction melting of a titanium-based alloy, characterized in that it comprises a crucible body and a separator attached to the inner surface of the crucible body, and the material of the separator is made of cerium oxide.
  7. The ceramic crucible for induction melting of a titanium-based alloy according to claim 6, wherein the bottom of the crucible has a suction opening, and the inner cavity of the crucible has a diameter of 20 to 70 cm and a height of 40 to 150cm, the diameter of the aforementioned suction casting port is 5 to 40cm; ideally, the inner cavity of the foregoing crucible has a diameter of 30-60cm and a height of 50-100cm, and the diameter of the suction opening is 10-30cm; The material of the foregoing ruthenium body is made of ruthenium dioxide; desirably, the thickness of the foregoing separator is 0.5-1.5 mm; and the thickness of the ruthenium body is 5-15 mm.
  8. A method for preparing a ceramic crucible according to claim 6 or 7, wherein the method comprises at least the following steps: step A, providing a wax member; and step B, coating the wax member with a material containing cerium oxide. Slurry, then drying to obtain a blank coated with a slurry containing cerium oxide; step C, coating the blank obtained in step B with a slurry containing cerium oxide, and then drying; step D, repeating step C setting After the number of times, the blank is calcined to obtain a finished product.
  9. The method for preparing a ceramic crucible according to claim 8, wherein the cerium oxide-containing slurry component comprises 40% to 60% cerium oxide and 40% to 60% zirconium acetate solution 40% to 60%. The composition of the foregoing cerium oxide-containing slurry comprises 40%-70% cerium oxide powder and 30%-60% water; the thickness of the slurry containing cerium oxide coated in the above step B is 0.5-1.5 mm; The slurry containing cerium oxide in step C has a thickness of 1-2 mm.
  10. The method for producing a ceramic crucible according to the eighth aspect of the invention, wherein the calcination temperature in the step D is 900 to 1300 ° C, and the calcination time is 1-3 hours.
TW105101200A 2015-01-16 2016-01-15 Titanium-based alloy induction melting bottom leakage type vacuum suction casting device and control method TW201627086A (en)

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