CN103834822B - Titanium-based amorphous matrix material melting and casting method and casting device - Google Patents

Abstract

A melting and casting method and casting device for a titanium-based amorphous composite material. The smelting and casting method of titanium-based amorphous composite materials utilizes the force effect in the principle of electromagnetic induction to suspend the alloy in the crucible in the air and melt, avoiding the pollution introduced by contact with the crucible, and realizing the control of the heating state of the alloy . At the end of the smelting process, turn off the heating power and open the solenoid valve for suction casting or spray casting to realize rapid filling of the alloy solution. During the spray-casting process, the spray-casting speed is controlled by changing the air pressure in the air storage tank, and then amorphous composite materials with different microstructures are prepared by controlling the solidification process. The present invention overcomes the defects existing in the prior art, and integrates the prior art to obtain large-size titanium-based amorphous composite materials, and at the same time realizes process adjustment by adjusting process parameters such as temperature, holding time, cycle heating times, and casting speed. The stable control of the organizational structure results in an ideal optimized design structure.

Description

Melting and casting method and casting device for titanium-based amorphous composite material

technical field

The invention belongs to the technical field of preparation of amorphous composite materials, and in particular provides a melting and casting method for titanium-based amorphous composite materials and a special casting device thereof.

Background technique

Due to its special atomic structure of long-range disorder and short-range order, amorphous alloys exhibit more excellent properties than traditional crystalline alloys, such as high strength, high hardness, high corrosion resistance, excellent magnetic properties and certain temperature Superplasticity within the range, etc., has shown great application value in the fields of aerospace devices, precision machinery and information. However, due to the poor room temperature plasticity and small critical size of amorphous alloys, the wide application of amorphous alloys is greatly restricted. The titanium-based amorphous composite material obtained by the autogenous composite method has excellent low-temperature, room-temperature and high-temperature mechanical properties, and has great potential for practical application. The methods commonly used to prepare amorphous and amorphous composite materials include arc melting + copper mold suction casting; induction melting + spray casting; quartz tube water quenching method, etc., each method has certain characteristics, but also has certain limitations. sex and shortcomings. The amorphous composite materials prepared by these methods are small in size, and cannot accurately monitor the specific parameters in the melting and casting process, and depend on the operator's experience to a certain extent, so their performance is unstable. Therefore, it is of obvious practical significance to theoretically analyze the relationship between process-structure-property, and then to control the size and morphology of the reinforcement phase reasonably by controlling the process parameters, and to obtain large-size amorphous composites with stable structures.

The traditional preparation of amorphous and its composite materials includes arc melting + copper mold suction casting (Inoue, A. and T. Zhang (1995). "Fabrication of bulky Zr-based glassy alloys by suction casting into copper mold." Materials transactions-JIM36:1184-1187.), induction melting spray casting (Kühn, U., J. Eckert, et al. (2002). "ZrNbCuNiAlbulkmetallic glass matrix composites containing dendriticbccphaseprecipitates." Appliedphysicsletters80 (14): 2478-2480.) and other methods. On the basis of traditional preparation methods, in order to overcome its various shortcomings, people have proposed various new preparation methods of amorphous and composite materials.

The patent "Preparation of Bulk Amorphous Alloy by Suspension Melting and Spray Casting (Publication No. CN1361298A)" by Shenyang Institute of Metals, Chinese Academy of Sciences proposes to suspend and melt the alloy ingot placed in the V-shaped quartz funnel through a V-shaped induction coil, and spray-cast it through a copper mold. method to obtain flake amorphous materials. The invention uses the method of suspension to prepare amorphous alloys, which can avoid the problem of impurity introduction often encountered in conventional methods. The method of high-purity Ar gas spray casting makes the alloy liquid contact with the mold as soon as possible, which not only improves the cooling rate of the melt, Moreover, it greatly improves the fillability of the melt and improves the precision of the casting, which provides a way of thinking for our research. However, if this method is used to prepare large-scale titanium-based amorphous composite materials, there are still some unsolvable problems: firstly, the V-shaped quartz funnel where the alloy is placed will react strongly with titanium at high temperature. When the liquid is completely suspended, the composition will still be inaccurate due to the reaction; the second suspension coil has a limited suspension capacity, which limits the development of amorphous composite castings to large sizes; the third spray-casting sample There will be porosity problems, which will affect the performance of castings.

Lanzhou University of Technology (Feng Liu. Preparation and performance testing of copper-based bulk amorphous alloys: [Master's Dissertation of Lanzhou University of Technology]. Lanzhou: Lanzhou University of Technology, 2004, 7) Smelting through water-cooled copper crucible + upper suction casting Copper-based amorphous and copper-based amorphous composites were prepared by the method. However, there are certain problems with this method: firstly, it is difficult to measure the temperature by adopting the upper end suction casting mold, and the upper end suction casting mold blocks the best temperature measurement position, so it can only be realized by controlling the smelting voltage. level control, but a good correspondence cannot be established between the smelting voltage and the actual temperature of the melt; secondly, the upper-end suction casting needs to insert a long quartz tube into the melt, so this method cannot be applied to the A titanium-based amorphous composite material that reacts strongly with quartz; third, heating the raw material directly in a water-cooled copper crucible often causes the high melting point substance to not completely melt and cause strong component segregation.

Contents of the invention

In order to overcome the shortcomings in the prior art that are not suitable for the preparation of large-scale titanium-based amorphous composite materials, or cause composition segregation of the prepared titanium-based amorphous composite materials, the present invention proposes a titanium-based amorphous composite material Melting and casting method and casting device.

Concrete process of the present invention is:

Step 1, alloy master ingot melting: Ti, Zr, Nb, Cu, Be with a purity greater than 99.9% are smelted in two steps in an electric arc melting furnace under the protection of argon:

The first step is to smelt TiZrNb alloy ingots: smelting Ti, Zr, and Nb with high melting points into TiZrNb melts by conventional methods; cooling and solidifying the TiZrNb melts into TiZrNb alloy ingots.

The second step is to smelt the alloy master ingot of amorphous composite material: place Cu and Be on the TiZrNb alloy ingot after repeated smelting by conventional methods. The TiZrNb alloy ingot and Cu and Be placed on the TiZrNb alloy ingot are melted to obtain an alloy solution of Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₇ amorphous composite material. The alloy solution of amorphous composite material is cooled and solidified to become an alloy mother ingot of amorphous composite material.

The electromagnetic stirring current is 10mA. During smelting, the arc melting furnace is filled with 0.5 atmospheres of argon. When the TiZrNb alloy ingot is smelted, the current is 450A, and the smelting time is 5 minutes. When the alloy ingot of amorphous composite material is smelted, the current is 400A, and the smelting time is 5 minutes.

Step 2, furnace washing: put the obtained amorphous composite alloy master ingot into the water-cooled copper crucible of the water-cooled copper crucible spray/suction casting device, and adopt conventional methods to wash the furnace: put the water-cooled copper crucible spray/suction casting device cavity After the air pressure is evacuated to 4Pa, fill the chamber with Ar gas to make the air pressure in the chamber reach 1×10 ⁴ Pa, and repeat the furnace cleaning process of vacuuming→filling with Ar gas several times.

After the above-mentioned furnace washing is completed, Ar gas is filled into the water-cooled copper crucible spray/suction casting device to 1.1 atmospheres, so that the air pressure in the cavity is slightly higher than the air pressure outside the cavity of the water-cooled copper crucible spray/suction casting device.

Step 3, solute treatment: use an induction power supply to heat the amorphous composite alloy master ingot in the water-cooled copper crucible spray/suction casting device: move the position of the lifting table so that the induction coil is set on the outer circumference of the water-cooled copper crucible surface, and the distance between the induction coil and the outer peripheral surface of the water-cooled copper crucible is 5-10 mm, and the distance between the bottom end face of the induction coil and the bottom end face of the water-cooled copper crucible is 15-20 mm.

The power output frequency is 140KHz when heating. The input frequency of the induction power supply is 50-60Hz, the input voltage is 380V, the oscillation frequency is 15-30KHz, the input current is 105A, the input power is 65KW, the cooling water temperature is 10-45°C, and the cooling water pressure is 0.15-0.3MPa .

When heating, the output current is set to the maximum value of 55A, so that the alloy mother ingot is in a suspension state under the suspension force of the induced magnetic field in the water-cooled copper crucible and begins to melt. When the alloy mother ingot starts to melt, reduce the output current of the power supply to 50A at a constant speed within 0.5min, so that the temperature of the alloy mother ingot in the water-cooled copper crucible is 1000-1200°C and keep it for 0.5-5min. A solute-treated amorphous composite material alloy solution is obtained.

Step 4, suction casting:

Utilizing the pressure difference between the cavity of the water-cooled copper crucible spray/suction casting device and the suction casting pipeline, the solute-treated amorphous composite material alloy solution is suction-cast. During suction casting, the air pressure in the suction casting pipe is 4Pa. Reduce the output current of the heating power supply to 30A, so that the amorphous composite material alloy solution contacts the bottom of the crucible.

Turn on the electromagnetic valve switch of the mechanical pump in the water-cooled copper crucible spray/suction casting device, and at the same time turn off the heating power supply immediately, and use the pressure difference of ¹⁰⁵ MPa in the cavity and the suction casting pipe to pass the alloy melt through the suction casting with a diameter of 8 mm at the bottom of the crucible The holes are suction-cast into a copper mold located under the crucible to obtain an amorphous composite material alloy rod.

Step 5, disassemble the mold and take samples.

The casting device proposed by the present invention for the smelting and casting method of the titanium-based amorphous composite material includes a water cooling system, a water-cooled copper crucible, a casting mold, a base and a mold seat. The water cooling system includes a cooling water box and a plurality of cooling water pipes formed by nesting water outlet pipes in water inlet pipes. The cooling water box is installed on the top of the quartz cover, the ports of the water inlet pipes at the lower ends of the cooling water pipes are respectively fixed on the cooling water holes on the upper end surface of the water-cooled copper crucible, and the outlet pipes at the lower ends of each cooling water pipe are inserted into the cooling water on the upper end surface of the water-cooled copper crucible. inside the water hole. Both the water-cooled copper crucible and the casting mold are located in the quartz cover, and the lower end surface of the water-cooled copper crucible is joined with the upper end surface of the casting mold. The lower end of the quartz cover is placed on the base, and the lower end of the casting mold is placed on the mold seat and sealed. The base is set and fixed on the mold base. The top cover is located on top of the cooling water box. The top cover and the base are fixedly connected by screws. The coil is set on the shell of the quartz cover and corresponds to the position of the water-cooled copper crucible in the quartz cover.

The number of the cooling water pipes is the same as the number of water-cooled copper crucible petals.

The water-cooled copper crucible is a water-cooled copper crucible composed of 16 crucible petals, and the slit size between the crucible petals is respectively: the slit size at the inner wall of the water-cooled copper crucible is 0.4 mm, and the slit at the outer wall of the water-cooled copper crucible is 0.4 mm. The size is 3.0mm. After the water-cooled copper crucible petals are combined into a water-cooled copper crucible, the slits on the inner surface of the water-cooled copper crucible are small to prevent the alloy liquid from leaking; the slits on the outer surface of the water-cooled copper crucible are larger to enhance the suspension force . There is a through hole with a diameter of 8.0mm at the center of the bottom of the water-cooled copper crucible, which is used for spray casting and suction casting of the casting device. There is an annular groove on the outer end surface of the bottom of the water-cooled copper crucible, and the mold is limited by the groove to realize the concentricity of the mold cavity and the spray casting port.

The cooling water box includes a water box core, a sleeve and a water box top cover. The water box core is loaded into the sleeve in the manner of transition fit; the top cover of the water box is fixedly connected with the upper end of the sleeve, and the lower end of the water box core is fixedly connected with the lower end of the sleeve. Both the top cover of the water box and the core of the sleeve water box are sealed. A cavity is formed between the outer peripheral surface of the water box core and the inner peripheral surface of the sleeve. The baffle in the middle of the water box core is in sealing fit with the inner surface of the sleeve, and the cavity between the outer peripheral surface of the water box core and the inner surface of the sleeve is separated by the baffle to form the upper water outlet cavity and the lower water outlet cavity. Inlet cavity.

There is a radially protruding partition on the outer peripheral surface of the water box core, and the outer diameter of the partition is the same as the inner diameter of the sleeve. A plurality of through holes for the water outlet pipes are evenly distributed on the partition plate in the middle of the water box core. On the flange at the lower end of the water box core, a plurality of through holes for the water inlet pipe are evenly distributed. There is a water outlet hole on the upper part of the sleeve housing, and a water inlet hole on the lower part of the sleeve housing; the angle between the center line of the water outlet hole and the center line of the water inlet hole is 90°. There is a spray-casting hole on the circumferential surface of the top cover of the water box, and the center line of the spray-cast hole and the center line of the top cover of the water box are perpendicular to each other. The two ends of the injection hole are respectively connected with the air intake pipe.

There is a platform at the upper end surface of the through hole, which is used for placing graphite nozzles when spraying/absorbing alloy liquid with poor fluidity.

The casting mold is formed by combining two semicircular parting parts with the same structure. The outer diameter of the casting mold is smaller than the inner diameter of the quartz housing. The center of the casting mold is a cavity that has the same shape as the workpiece to be cast. There is an axially protruding annular positioning platform on the upper end surface of the casting mold, and the annular positioning platform cooperates with the annular groove at the bottom of the water-cooled copper crucible to realize the positioning of the casting mold. There are respectively axially protruding fastening platforms on the two ends of the casting mold, and the steel rings are placed on the fastening platforms, and the two semicircular parting parts are matched and tightened.

There is a casting suction hole in the center of the mold base, which communicates with the mechanical pump through a pipeline. There are two stepped bosses on the end face of the mold base, and there is a groove in the center of the uppermost step. The inner diameter of the groove is the same as the outer diameter of the smallest boss on the lower end face of the casting mold, so that the lower end of the casting mold in the groove. The outer diameter of the second step of the mold seat is the same as the inner diameter of the base and the same as the inner diameter of the quartz cover. A pipe joint for connecting a mechanical pump is arranged at the center hole of the other end surface of the mold base. A pair of radially protruding clamping blocks are symmetrically distributed on the circumferential surface of the mold base, and the clamping blocks have a clamping groove for fixing the mold base and the lifting device of the supporting frame.

The outer edge of the surface of the base is evenly distributed with three mounting holes for screw rods. The inner diameter of the base is the same as the inner diameter of the quartz housing. There is an axially protruding sealing ring on the upper surface of the base, and the inner diameter of the sealing ring is the same as the outer diameter of the quartz cover; there is a threaded hole on the upper surface of the base for fixing the base and the support frame. On the lower surface of the base, there are threaded holes fixedly connected with the mold base.

The invention utilizes the force effect in the principle of electromagnetic induction to suspend the alloy in the crucible and melt in the air, avoiding the pollution caused by the contact with the crucible, and can realize the control of the heating state of the alloy. At the end of the smelting process, turn off the heating power and open the solenoid valve for suction casting or spray casting to realize rapid filling of the alloy solution. During the spray-casting process, the spray-casting speed can be controlled by changing the air pressure in the air storage tank, and then amorphous composite materials with different microstructures can be prepared by controlling the solidification process.

The water-cooled copper crucible in the present invention can melt 300g titanium-based amorphous composite material alloy ingot. At the same time, in order to increase the suspending ability of the crucible to the alloy, the slit between the crucible flaps is designed as a wedge-shaped structure, and the slit width close to the inside of the crucible is small to prevent the alloy liquid from leaking, and the slit width on the outside of the crucible is appropriately increased. Enhance suspension. A hole is opened in the center of the bottom of the crucible to realize the functions of spray casting and suction casting. A platform is woked at the upper end of the hole, which is used to place the graphite nozzle when spraying and sucking alloy liquid with poor fluidity. The ring-shaped groove at the bottom of the crucible is used to limit the position of the mold to realize the centering of the mold cavity and the spray casting port. In order to place the mold at the lower end of the crucible, the nested water cooling system of the crucible is designed on the upper part of the crucible.

The mold proposed in the present invention can obtain rods, plates or even parts with complex shapes by changing the shape of the mold cavity under the premise of specifying the external dimensions; the bottom of the mold base has sheet-shaped air holes to facilitate the casting process The discharge of gas in the mold cavity. The upper and lower shoulders of the mold are fastened with stainless steel fastening rings to prevent the mold from cracking when the alloy liquid is cast into the mold cavity. The annular platform at the upper end of the mold can be embedded in the groove at the bottom of the crucible to achieve the purpose of limiting.

Due to the above-mentioned technical scheme adopted, the present invention has the following advantages:

1) Realized the integration of smelting and casting process and simplified the process; the water-cooled copper crucible suspension smelting method can suspend and smelt the alloy without contacting the crucible, reducing the introduction of impurities and avoiding the traditional induction melting spray casting process The reaction between the alloy and the quartz glass;

2) The actual temperature of the alloy melt in the crucible can be accurately measured by the infrared thermometer, so that the state of the melt can be controlled by changing the magnitude of the induced current and the holding time, and the preparation process no longer depends on the subjective experience of the operator;

3) The injection casting rate can be controlled by controlling the air pressure in the air storage tank. In order to study the influence of the solidification path on the surrounding structure of the amorphous composite material, the suction casting method can obtain a more perfect filling of the amorphous composite material, which can Direct access to amorphous composite parts with complex shapes;

4) The mold can be replaced as needed, and amorphous composite materials of different shapes and sizes can be obtained. After the casting process is completed, mechanized mold taking can be realized through the lifting platform; for alloys with high cooling speed requirements, the invention is also equipped with a special water-cooled copper mold and its mold holder;

5) Up to 300g of alloy can be smelted in a water-cooled copper crucible at one time, and large-sized amorphous composite materials can be obtained by combining spraying and suction casting. As can be seen from accompanying drawing 12, adopt the method of the present invention, can obtain the very complete diameter of filling mold and be 12mm, the large-scale titanium-based amorphous composite material rod material that length is 140mm, creates for the practical application of titanium-based amorphous composite material possible.

In summary, the present invention overcomes the defects existing in the prior art, and integrates the prior art to obtain large-size titanium-based amorphous composite materials, and at the same time through the process parameters such as temperature, holding time, cycle heating times, and casting speed The adjustment of the process realizes the stable control of the organizational structure by the process, and obtains the ideal optimal design structure.

Description of drawings

Fig. 1 is a schematic structural view of a casting device in the present invention, wherein Fig. 1a is a front view, and Fig. 1b is a top view;

Fig. 2 is the structural representation of water box top cover;

Fig. 3 is a schematic structural view of the water box cover;

Fig. 4 is a schematic structural view of the water box core; wherein Fig. 4a is a sectional view, and Fig. 4b is a main view;

Fig. 5 is a schematic structural view of a water-cooled copper crucible; wherein Fig. 5a is a cross-sectional view, Fig. 5b is a top view, Fig. 5c is a front view of a water-cooled copper crucible crucible flap, and Fig. 5d is a top view of a water-cooled copper crucible crucible flap;

Fig. 6 is a schematic structural view of a casting mold; wherein Fig. 6a is a front view of one of the parting parts, and Fig. 6b is a top view of a casting mold;

Fig. 7 is a schematic structural view of the base; wherein Fig. 7a is a cross-sectional view of the A-A plane of the base, a cross-sectional view of the B-B plane of the base of Fig. 7b, and Fig. 7c is a top view of the base;

Fig. 8 is a schematic structural view of the mold seat; wherein Fig. 8a is a sectional view of the A-A plane of the mold seat, and Fig. 8b is a top view of the mold seat;

Fig. 9 is the XRD curve of the large-size titanium-based amorphous composite rod obtained in Example 1;

Fig. 10 is the microstructure of the scanning electron microscope of the large-size titanium-based amorphous composite rod obtained in Example 1;

Fig. 11 is the XRD curve of the large-size titanium-based amorphous composite rod obtained in Example 2;

Fig. 12 is the microstructure of the scanning electron microscope of the large-scale titanium-based amorphous composite rod obtained in Example 2;

Fig. 13 is the XRD curve of the large-size titanium-based amorphous composite rod obtained in Example 3;

Fig. 14 is the microstructure of the large-sized titanium-based amorphous composite rod obtained in Example 3 under the scanning electron microscope.

In the attached picture:

1. Top cover; 2. Glass cover; 3. Water box top cover; 4. Water box cover; 5. Faucet; 6. Water box core; 7. Quartz cover; 8. Water-cooled copper crucible; 9. Mold; 10 .Inner pressure ring; 11. Outer pressure ring; 12. Base; 13. Die seat; 14. Large bolt; 15. Induction coil

Detailed ways

Embodiment one

This example is a method for preparing a titanium-based amorphous composite material. The composition of the amorphous composite material is Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₅ , and the diameter of the amorphous composite material produced by suction casting in a water-cooled copper crucible is Φ12mm. Rods with a length of 140mm. The concrete process of this embodiment is:

Step 1, smelting the alloy master ingot: Melting Ti, Zr, Nb, Cu, Be with a purity greater than 99.9% in two steps through an electric arc melting furnace under the protection of argon. The electric arc melting furnace can simultaneously melt three alloy ingots; each alloy ingot has a weight of 30g.

The specific process of smelting alloy master ingot is:

The first step is to melt the TiZrNb alloy ingot. First, Ti, Zr, and Nb with high melting points are smelted into TiZrNb melt; the power of the arc melting furnace is turned off, and the TiZrNb melt is cooled and solidified to form a TiZrNb alloy ingot. Turn the obtained TiZrNb alloy ingot up and down 180°, so that the lower surface of the TiZrNb alloy ingot becomes the upper surface; turn on the power supply of the arc melting furnace to melt the TiZrNb alloy ingot, and obtain the TiZrNb melt melted for the second time; close the arc melting Furnace power supply, the TiZrNb melt is cooled again to become a TiZrNb alloy ingot. The above process was repeated, and the TiZrNb alloy ingot was repeatedly smelted four times to ensure that the composition of the TiZrNb alloy ingot was uniform.

In the second step, the alloy master ingot of the amorphous composite material is smelted. Cu and Be were placed on the TiZrNb alloy ingot after repeated melting four times. Turn on the electric arc melting furnace to melt the TiZrNb alloy ingot and Cu and Be placed on the TiZrNb alloy ingot to obtain an alloy solution of Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₇ amorphous composite material. Turn off the power supply of the arc melting furnace, so that the amorphous composite material alloy solution is cooled and solidified to become an amorphous composite material alloy ingot. Turn the obtained amorphous composite alloy ingot up and down 180°, so that the lower surface of the amorphous composite alloy ingot becomes the upper surface; turn on the electric arc melting furnace power supply to melt the amorphous composite alloy ingot, and obtain The smelted amorphous composite alloy melt; the power supply of the arc melting furnace is turned off, so that the amorphous composite alloy melt is cooled again to become an amorphous composite alloy ingot. The above-mentioned process was repeated, and the alloy ingot of the amorphous composite material was smelted four times repeatedly to obtain the mother ingot of the alloy of the amorphous composite material with an atomic percentage of Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₇ .

Electromagnetic stirring is maintained during melting. The electromagnetic stirring current is 10mA.

During smelting, the arc melting furnace is filled with 0.5 atmospheres of argon.

When the TiZrNb alloy ingot is smelted, the current is 450A, and the smelting time is 5 minutes.

When the alloy ingot of amorphous composite material is smelted, the current is 400A, and the smelting time is 5 minutes.

Step 2, charging and washing the furnace: put the obtained 120g amorphous composite alloy master ingot into the water-cooled copper crucible of the water-cooled copper crucible spray/suction casting device, and use a mechanical pump to spray the water-cooled copper crucible into the cavity of the water-cooled copper crucible spray/suction casting device After the air pressure reaches 4 Pa, close the manual valve of the mechanical pump, and fill the chamber with Ar gas to make the air pressure in the chamber reach 1×10 ⁴ Pa. Repeat the above process of evacuating → filling with Ar gas 5 times to reduce the oxygen content in the cavity. The above-mentioned process of evacuating → filling with Ar gas is furnace cleaning.

After completing the above furnace cleaning, fill the water-cooled copper crucible spray/suction casting device with Ar gas to 1.1 atmospheres, so that the air pressure in the cavity is slightly higher than the air pressure outside the water-cooled copper crucible spray/suction casting device to ensure the melting and heating process There is no external oxygen entering the cavity of the water-cooled copper crucible spray/suction casting device. At the same time, because the pressure in the cavity of the water-cooled copper crucible spray/suction casting device is higher than the pressure in the suction casting pipeline, a pressure difference is formed, and the mold can be cast and filled more quickly in the subsequent suction casting process.

Step 3, solute treatment: use an induction power source to heat the amorphous composite alloy master ingot in the water-cooled copper crucible spray/suction casting device. The input frequency of the induction power supply is 50-60Hz, the input voltage is 380V, the oscillation frequency is 15-30KHz, the input current is 105A, the input power is 65KW, the cooling water temperature is 10-45°C, and the cooling water pressure is 0.15-0.3MPa . The induction coil of the induction power supply is made of a water-cooled copper tube with an outer diameter of 8mm. The inner diameter of the induction coil is 100mm, the number of turns is 4, and the spacing is 3mm. In this embodiment, the input frequency of the induction power supply is 50 Hz, the oscillation frequency is 30 KHz, the input current is 105 A, the input power is 65 KW, the cooling water temperature is 20° C., and the cooling water pressure is 0.3 MPa.

The heating process is as follows: the induction coil is set on the outer peripheral surface of the water-cooled copper crucible by moving the position of the lifting platform, and the distance between the induction coil and the outer peripheral surface of the water-cooled copper crucible is 5 ~ The distance between the bottom end face of the induction coil and the bottom end face of the water-cooled copper crucible is 15-20 mm. In this embodiment, the distance between the induction coil and the outer circumferential surface of the water-cooled copper crucible is 7.5mm, and the distance between the bottom end surface of the induction coil and the bottom end surface of the water-cooled copper crucible is 20mm.

The power output frequency is 140KHz when heating.

When heating, first turn on the output current to the maximum value of 55A, so that the alloy master ingot is in a suspension state under the suspension force of the induced magnetic field in the water-cooled copper crucible and begins to melt. When the alloy master ingot starts to melt, the output current of the power supply is reduced to 50A at a uniform speed within 0.5min, so that the temperature of the alloy master ingot in the water-cooled copper crucible is 1100°C and maintained for 0.5min. A solute-treated amorphous composite material alloy solution is obtained.

During heating, the temperature of the alloy master ingot in the water-cooled copper crucible is monitored by an infrared thermometer.

Step 4, suction casting:

Utilizing the pressure difference between the cavity of the water-cooled copper crucible spray/suction casting device and the suction casting pipeline, the solute-treated amorphous composite material alloy solution is suction-cast. During suction casting, the air pressure in the suction casting pipe is 4Pa.

During suction casting, reduce the output current of the heating power supply to 30A, so that the amorphous composite alloy solution contacts the bottom of the crucible.

Turn on the electromagnetic valve switch of the mechanical pump in the water-cooled copper crucible spray/suction casting device, and at the same time turn off the heating power supply immediately, and use the pressure difference of ¹⁰⁵ MPa in the cavity and the suction casting pipe to pass the alloy melt through the suction casting with a diameter of 8 mm at the bottom of the crucible The holes were suction-cast into the copper mold located below the crucible to obtain an amorphous composite material alloy rod with a diameter of Φ12mm and a length of 140mm. On the one hand, the suction casting hole can ensure that the melt will not drip in advance due to the effect of surface tension when it contacts the bottom of the crucible, and can also avoid incomplete filling of the suction casting rod caused by the suction casting hole being too small.

Step 5, disassemble the mold for sampling: After the melting and casting process is completed, fix the crucible and the support frame, loosen the screws fixed between the base and the mold holder, and lower the mold through the lifting platform to realize the mold taking.

The titanium-based amorphous material prepared in this example perfectly fills the entire mold cavity, and can accurately reflect the texture defects in the mold cavity. Therefore, titanium-based amorphous materials of different sizes and shapes can be obtained by changing the shape and size of the mold cavity. Crystalline composite materials can even cast the designed parts more accurately. The XRD and micrographs in the accompanying drawings provide evidence of the composition and organization of the rods obtained.

Embodiment two

This example is a method for preparing a titanium-based amorphous composite material. The composition of the amorphous composite material is Ti ₄₈ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₅ , and the diameter of the amorphous composite material produced by suction casting in a water-cooled copper crucible is Φ12mm. Rods with a length of 140mm. The concrete process of this embodiment is:

Step 1, smelting the alloy master ingot: Melting Ti, Zr, Nb, Cu, Be with a purity greater than 99.9% in two steps through an electric arc melting furnace under the protection of argon. The electric arc melting furnace can simultaneously melt three alloy ingots; each alloy ingot has a weight of 30 g.

The specific process of smelting alloy master ingot is:

The first step is to melt the TiZrNb alloy ingot. First, Ti, Zr, and Nb with high melting points are smelted into TiZrNb melt; the power of the arc melting furnace is turned off, and the TiZrNb melt is cooled and solidified to form a TiZrNb alloy ingot. Turn the obtained TiZrNb alloy ingot up and down 180°, so that the lower surface of the TiZrNb alloy ingot becomes the upper surface; turn on the power supply of the arc melting furnace to melt the TiZrNb alloy ingot, and obtain the TiZrNb melt melted for the second time; close the arc melting Furnace power supply, the TiZrNb melt is cooled again to become a TiZrNb alloy ingot. The above process was repeated, and the TiZrNb alloy ingot was repeatedly smelted four times to ensure that the composition of the TiZrNb alloy ingot was uniform.

In the second step, the alloy master ingot of the amorphous composite material is smelted. Cu and Be were placed on the TiZrNb alloy ingot after repeated melting four times. Turn on the electric arc melting furnace to melt the TiZrNb alloy ingot and Cu and Be placed on the TiZrNb alloy ingot to obtain an alloy solution of Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₇ amorphous composite material. Turn off the power supply of the arc melting furnace, so that the amorphous composite material alloy solution is cooled and solidified to become an amorphous composite material alloy ingot. Turn the obtained amorphous composite alloy ingot up and down 180°, so that the lower surface of the amorphous composite alloy ingot becomes the upper surface; turn on the electric arc melting furnace power supply to melt the amorphous composite alloy ingot, and obtain The smelted amorphous composite alloy melt; the power supply of the arc melting furnace is turned off, so that the amorphous composite alloy melt is cooled again to become an amorphous composite alloy ingot. The above process was repeated, and the alloy ingot of amorphous composite material was smelted four times repeatedly to obtain an alloy mother ingot of amorphous composite material with an atomic percentage of Ti ₄₈ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₅ .

Electromagnetic stirring is maintained during melting. The electromagnetic stirring current is 10mA.

During smelting, the arc melting furnace is filled with 0.5 atmospheres of argon.

When the TiZrNb alloy ingot is smelted, the current is 450A, and the smelting time is 5 minutes.

When the alloy ingot of amorphous composite material is smelted, the current is 400A, and the smelting time is 5 minutes.

Step 2, charging and washing the furnace: put the obtained 120g amorphous composite alloy master ingot into the water-cooled copper crucible of the water-cooled copper crucible spray/suction casting device, and use a mechanical pump to spray the water-cooled copper crucible into the cavity of the water-cooled copper crucible spray/suction casting device After the air pressure reaches 4 Pa, close the manual valve of the mechanical pump, and fill the chamber with Ar gas to make the air pressure in the chamber reach 1×10 ⁴ Pa. Repeat the above process of evacuating → filling with Ar gas 5 times to reduce the oxygen content in the cavity. The above-mentioned process of evacuating → filling with Ar gas is furnace cleaning.

After completing the above furnace cleaning, fill the water-cooled copper crucible spray/suction casting device with Ar gas to 1.1 atmospheres, so that the air pressure in the cavity is slightly higher than the air pressure outside the water-cooled copper crucible spray/suction casting device to ensure the melting and heating process There is no external oxygen entering the cavity of the water-cooled copper crucible spray/suction casting device. At the same time, because the pressure in the cavity of the water-cooled copper crucible spray/suction casting device is higher than the pressure in the suction casting pipeline, a pressure difference is formed, and the mold can be cast and filled more quickly in the subsequent suction casting process.

Step 3, solute treatment: use an induction power source to heat the amorphous composite alloy master ingot in the water-cooled copper crucible spray/suction casting device. The input frequency of the induction power supply is 50-60Hz, the input voltage is 380V, the oscillation frequency is 15-30KHz, the input current is 105A, the input power is 65KW, the cooling water temperature is 10-45°C, and the cooling water pressure is 0.15-0.3MPa . The induction coil of the induction power supply is made of a water-cooled copper tube with an outer diameter of 8mm. The inner diameter of the induction coil is 100mm, the number of turns is 4, and the spacing is 3mm. In this embodiment, the input frequency of the induction power supply is 50 Hz, the oscillation frequency is 30 KHz, the input current is 105 A, the input power is 65 KW, the cooling water temperature is 20° C., and the cooling water pressure is 0.3 MPa.

The heating process is as follows: the induction coil is set on the outer peripheral surface of the water-cooled copper crucible by moving the position of the lifting platform, and the distance between the induction coil and the outer peripheral surface of the water-cooled copper crucible is 5 ~ The distance between the bottom end face of the induction coil and the bottom end face of the water-cooled copper crucible is 15-20 mm. In this embodiment, the distance between the induction coil and the outer circumferential surface of the water-cooled copper crucible is 7.5mm, and the distance between the bottom end surface of the induction coil and the bottom end surface of the water-cooled copper crucible is 20mm.

The power output frequency is 140KHz when heating.

When heating, first turn on the output current to the maximum value of 55A, so that the alloy master ingot is in a suspension state under the suspension force of the induced magnetic field in the water-cooled copper crucible and begins to melt. When the alloy mother ingot starts to melt, the output current of the power supply is reduced to 46A at a uniform speed within 0.5min, so that the temperature of the alloy mother ingot in the water-cooled copper crucible is 1000°C and maintained for 5min. A solute-treated amorphous composite material alloy solution is obtained.

During heating, the temperature of the alloy master ingot in the water-cooled copper crucible is monitored by an infrared thermometer.

Step 4, suction casting:

Utilizing the pressure difference between the cavity of the water-cooled copper crucible spray/suction casting device and the suction casting pipeline, the solute-treated amorphous composite material alloy solution is suction-cast. During suction casting, the air pressure in the suction casting pipe is 4Pa.

During suction casting, reduce the output current of the heating power supply to 30A, so that the amorphous composite alloy solution contacts the bottom of the crucible.

Turn on the electromagnetic valve switch of the mechanical pump in the water-cooled copper crucible spray/suction casting device, and at the same time turn off the heating power supply immediately, and use the pressure difference of ¹⁰⁵ MPa in the cavity and the suction casting pipe to pass the alloy melt through the suction casting with a diameter of 8 mm at the bottom of the crucible The holes were suction-cast into the copper mold located below the crucible to obtain an amorphous composite material alloy rod with a diameter of Φ12mm and a length of 140mm. On the one hand, the suction casting hole can ensure that the melt will not drip in advance due to the effect of surface tension when it contacts the bottom of the crucible, and can also avoid incomplete filling of the suction casting rod caused by the suction casting hole being too small.

Step 5, disassemble the mold for sampling: After the melting and casting process is completed, fix the crucible and the support frame, loosen the screws fixed between the base and the mold holder, and lower the mold through the lifting platform to realize the mold taking.

In this example, the titanium-based amorphous material prepared by semi-solid treatment in the two-phase region can be kept for a long time in the two-phase region to cause the original coarse dendrites to be fused and broken, and at the same time, under the action of magnetic stirring in the water-cooled copper crucible Spheroidization occurs below. The XRD and micrographs in the accompanying drawings provide evidence of the composition and organization of the rods obtained.

Embodiment three

This example is a method for preparing a titanium-based amorphous composite material. The composition of the amorphous composite material is Ti ₄₈ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₅ , and the diameter of the amorphous composite material produced by suction casting in a water-cooled copper crucible is Φ12mm. Rods with a length of 30mm. The concrete process of this embodiment is:

Step 1, smelting the alloy master ingot: Melting Ti, Zr, Nb, Cu, Be with a purity greater than 99.9% in two steps through an electric arc melting furnace under the protection of argon. The electric arc melting furnace can simultaneously melt three alloy ingots; each alloy ingot has a weight of 30g.

The specific process of smelting alloy master ingot is:

The first step is to melt the TiZrNb alloy ingot. First, Ti, Zr, and Nb with high melting points are smelted into TiZrNb melt; the power of the arc melting furnace is turned off, and the TiZrNb melt is cooled and solidified to form a TiZrNb alloy ingot. Turn the obtained TiZrNb alloy ingot up and down 180°, so that the lower surface of the TiZrNb alloy ingot becomes the upper surface; turn on the power supply of the arc melting furnace to melt the TiZrNb alloy ingot, and obtain the TiZrNb melt melted for the second time; close the arc melting Furnace power supply, the TiZrNb melt is cooled again to become a TiZrNb alloy ingot. The above process was repeated, and the TiZrNb alloy ingot was repeatedly smelted four times to ensure that the composition of the TiZrNb alloy ingot was uniform.

In the second step, the alloy master ingot of the amorphous composite material is smelted. Cu and Be were placed on the TiZrNb alloy ingot after repeated melting four times. Turn on the electric arc melting furnace to melt the TiZrNb alloy ingot and Cu and Be placed on the TiZrNb alloy ingot to obtain an alloy solution of Ti ₄₆ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₇ amorphous composite material. Turn off the power supply of the arc melting furnace, so that the amorphous composite material alloy solution is cooled and solidified to become an amorphous composite material alloy ingot. Turn the obtained amorphous composite alloy ingot up and down 180°, so that the lower surface of the amorphous composite alloy ingot becomes the upper surface; turn on the electric arc melting furnace power supply to melt the amorphous composite alloy ingot, and obtain The smelted amorphous composite material alloy melt; the power supply of the arc melting furnace is turned off, so that the amorphous composite material alloy melt is cooled again to become an amorphous composite material alloy ingot. The above process was repeated, and the alloy ingot of amorphous composite material was smelted four times repeatedly to obtain an alloy mother ingot of amorphous composite material with an atomic percentage of Ti ₄₈ Zr ₂₀ Nb ₁₂ Cu ₅ Be ₁₅ .

Electromagnetic stirring is maintained during melting. The electromagnetic stirring current is 10mA.

During smelting, the arc melting furnace is filled with 0.5 atmospheres of argon.

When the TiZrNb alloy ingot is smelted, the current is 450A, and the smelting time is 5 minutes.

When the alloy ingot of amorphous composite material is smelted, the current is 400A, and the smelting time is 5 minutes.

Step 2, furnace washing: put the obtained 120g amorphous composite alloy master ingot into the water-cooled copper crucible of the water-cooled copper crucible spray/suction casting device, and pump the air pressure in the cavity of the water-cooled copper crucible spray/suction casting device through a mechanical pump After reaching 4Pa, close the manual valve of the mechanical pump, and fill the chamber with Ar gas to make the pressure in the chamber reach 1×10 ⁴ Pa. Repeat the above process of evacuating → filling with Ar gas 5 times to reduce the oxygen content in the cavity. The above-mentioned process of evacuating → filling with Ar gas is furnace cleaning.

After completing the above furnace cleaning, fill the water-cooled copper crucible spray/suction casting device with Ar gas to 1.1 atmospheres, so that the air pressure in the cavity is slightly higher than the air pressure outside the water-cooled copper crucible spray/suction casting device to ensure the melting and heating process There is no external oxygen entering the cavity of the water-cooled copper crucible spray/suction casting device. At the same time, because the pressure in the cavity of the water-cooled copper crucible spray/suction casting device is higher than the pressure in the suction casting pipeline, a pressure difference is formed, and the mold can be cast and filled more quickly in the subsequent suction casting process.

Step 3, solute treatment: use an induction power source to heat the amorphous composite alloy master ingot in the water-cooled copper crucible spray/suction casting device. The input frequency of the induction power supply is 50-60Hz, the input voltage is 380V, the oscillation frequency is 15-30KHz, the input current is 105A, the input power is 65KW, the cooling water temperature is 10-45°C, and the cooling water pressure is 0.15-0.3MPa . The induction coil of the induction power supply is made of a water-cooled copper tube with an outer diameter of 8mm. The inner diameter of the induction coil is 100mm, the number of turns is 4, and the spacing is 3mm. In this embodiment, the input frequency of the induction power supply is 50 Hz, the oscillation frequency is 30 KHz, the input current is 105 A, the input power is 65 KW, the cooling water temperature is 20° C., and the cooling water pressure is 0.3 MPa.

The heating process is as follows: the induction coil is set on the outer peripheral surface of the water-cooled copper crucible by moving the position of the lifting platform, and the distance between the induction coil and the outer peripheral surface of the water-cooled copper crucible is 5 ~ The distance between the bottom end face of the induction coil and the bottom end face of the water-cooled copper crucible is 15-20 mm. In this embodiment, the distance between the induction coil and the outer circumferential surface of the water-cooled copper crucible is 7.5mm, and the distance between the bottom end surface of the induction coil and the bottom end surface of the water-cooled copper crucible is 20mm.

The power output frequency is 140KHz when heating.

When heating, first turn on the output current to the maximum value of 55A, so that the alloy master ingot is in a suspension state under the suspension force of the induced magnetic field in the water-cooled copper crucible and begins to melt. When the alloy mother ingot starts to melt, the output current of the power supply is reduced to 46A at a uniform speed within 0.5min, so that the temperature of the alloy mother ingot in the water-cooled copper crucible is 1200°C and maintained for 2min. A solute-treated amorphous composite material alloy solution is obtained.

During heating, the temperature of the alloy master ingot in the water-cooled copper crucible is monitored by an infrared thermometer.

Step 4, suction casting:

Utilizing the pressure difference between the cavity of the water-cooled copper crucible spray/suction casting device and the suction casting pipeline, the solute-treated amorphous composite material alloy solution is suction-cast. During suction casting, the air pressure in the suction casting pipe is 4Pa.

During suction casting, reduce the output current of the heating power supply to 30A, so that the amorphous composite alloy solution contacts the bottom of the crucible.

Turn on the solenoid valve switch of the mechanical pump in the water-cooled copper crucible spray/suction casting device, and at the same time turn off the heating power supply immediately, and use the pressure difference of 105MPa in the cavity and the suction casting pipe to suck the alloy melt through the suction casting hole with a diameter of 8mm at the bottom of the crucible Cast into a copper mold located below the crucible to obtain an amorphous composite material alloy rod with a diameter of Φ12 mm and a length of 30 mm. On the one hand, the suction casting hole can ensure that the melt will not drip in advance due to the effect of surface tension when it contacts the bottom of the crucible, and can also avoid incomplete filling of the suction casting rod caused by the suction casting hole being too small.

Step 5, disassemble the mold for sampling: After the melting and casting process is completed, fix the crucible and the support frame, loosen the screws fixed between the base and the mold holder, and lower the mold through the lifting platform to realize the mold taking.

In this example, the titanium-based amorphous material prepared by semi-solid treatment in the two-phase region can make the original thick dendrites fuse and break up in the two-phase region, and at the same time balls can be generated under the action of magnetic stirring in the water-cooled copper crucible. change,. The XRD and micrographs in the accompanying drawings provide evidence of the composition and organization of the rods obtained.

Embodiment four

This embodiment is a casting device for preparing titanium-based amorphous composite materials, including a water cooling system, a water-cooled copper crucible 8 , a casting mold 9 , a base 12 and a mold seat 13 . The water cooling system includes a cooling water box and a plurality of cooling water pipes formed by nesting water outlet pipes in water inlet pipes. The cooling water box is installed on the top of the quartz cover 7, and the ports of the water inlet pipes at the lower ends of the cooling water pipes are respectively fixed on the cooling water orifices on the upper end surface of the water-cooled copper crucible, and the outlet pipes at the lower ends of each cooling water pipe are inserted into the upper end surface of the water-cooled copper crucible. In the cooling water hole. Both the water-cooled copper crucible 8 and the casting mold 9 are located in the quartz cover 7 , and the lower end surface of the water-cooled copper crucible 8 is joined to the upper end surface of the casting mold 9 . The lower end of the quartz cover 7 is placed on the base 12, and the lower end of the casting mold 9 is placed on the mold seat 13 and sealed. The base 12 is set and fixed on the mold base 13 . The top cover 1 is located on the top of the cooling water box. The top cover 1 and the base 12 are fixedly connected by a screw 14 . The coil 15 is sleeved on the shell of the quartz cover 7 and corresponds to the position of the water-cooled copper crucible 8 inside the quartz cover 7 .

The number of the cooling water pipes is the same as the number of water-cooled copper crucible petals.

The water-cooled copper crucible 8 is a water-cooled copper crucible. The water-cooled copper crucible is obtained by improving the prior art. The water-cooled copper crucible can melt 300g of titanium-based amorphous composite material alloy ingot. The water-cooled copper crucible 8 in this embodiment is made up of 16 crucible petals, and the slit size between each crucible petal is respectively: the slit size at the inner wall of the water-cooled copper crucible is 0.4 mm, and the slit size at the outer wall of the water-cooled copper crucible After each water-cooled copper crucible flap is combined into a water-cooled copper crucible, the slits on the inner surface of the water-cooled copper crucible are smaller to prevent alloy liquid from leaking; the slits on the outer surface of the water-cooled copper crucible are larger to enhance the suspension force. There is a through hole with a diameter of 8.0mm at the center of the bottom of the water-cooled copper crucible, which is used for spray casting and suction casting of the casting device. A platform is woked at the upper end face of the through hole. The platform has a diameter of 10.0mm and a depth of 1.0mm. It is used to place a graphite nozzle when spraying/suction casting alloy liquid with poor fluidity. There is an annular groove on the outer end surface of the bottom of the water-cooled copper crucible, and the mold is limited by the groove to realize the concentricity of the mold cavity and the spray casting port.

The cooling water box includes a water box core 6 , a sleeve 4 and a water box top cover 3 . The water box core 6 is loaded into the sleeve 4 in a transition fit manner, and the water box top cover 3 is fixed on the flange at the upper end of the sleeve 4 by bolts; the flange at the lower end of the water box core 6 is connected to the sleeve 4 The flange at the lower end is fixedly connected. Both the water box top cover 3 and the sleeve 4 water box core 6 are sealed. A cavity is formed between the outer peripheral surface of the water box core and the inner peripheral surface of the sleeve. The dividing plate in the middle of the water box core 6 is in sealing fit with the inner surface of the sleeve 4, and the cavity between the outer peripheral surface of the water box core and the inner circular surface of the sleeve is separated by the dividing plate, forming the upper water outlet cavity and the inner surface of the sleeve. The lower water inlet cavity.

The water box core 6 is a circular shell made of brass. The inner diameter of water box core 6 is slightly smaller than the inner diameter of water-cooled copper crucible 8, to facilitate feeding. There are flanges at the upper end and the lower end of the water box core 6 . The outer peripheral surface of the water box core 6 has a radially protruding baffle, and the outer diameter of the baffle is the same as the inner diameter of the sleeve 4 . A plurality of through holes for water outlet pipes are evenly distributed on the partition plate in the middle of the water box core 6 . On the flange at the lower end of the water box core 6, there are evenly distributed a plurality of through holes for the water inlet pipe.

The sleeve 4 is a circular shell made of stainless steel. The inner diameter of sleeve 4 is identical with the outer diameter of the dividing plate on the water box core. There are flanges at both ends of the sleeve 4, and threaded holes are evenly distributed on the flanges at both ends of the sleeve. There is a water outlet hole on the upper part of the casing of the sleeve 4, and a water inlet hole is arranged on the lower part of the casing of the sleeve 4; the angle between the centerline of the water outlet hole and the centerline of the water inlet hole is 90° °.

The water box top cover 3 is an annular disk made of stainless steel. The outer diameter of the water box top cover 3 is the same as that of the sleeve 4 upper end flange; the inner diameter of the water box top cover 3 is the same as that of the water box core 6 . Spray casting holes are arranged on the circumferential surface of the water box top cover 3, and the center line of the spray casting hole and the center line of the water box top cover are perpendicular to each other. The two ends of the injection hole are respectively connected with the air intake pipe.

The casting mold 9 is composed of two semicircular parting parts with the same structure. The outer diameter of the casting mold 9 is smaller than the inner diameter of the quartz housing. The center of the casting mold 9 is a mold cavity, and the shape of the mold cavity is the same as that of the workpiece to be cast. There is an axially protruding annular positioning platform on the upper end surface of the casting mold 9, and the annular positioning platform cooperates with the annular groove at the bottom of the water-cooled copper crucible to realize the positioning of the casting mold. There are respectively axially protruding fastening platforms on the two ends of the casting mold, and the steel rings are placed on the fastening platforms, and the two semicircular parting parts are matched and tightened.

The mold seat 13 is in the shape of a hollow disc. The center of mold base 13 has suction casting hole, is communicated with mechanical pump by pipeline. Threaded holes for connecting the base 12 are distributed on the outer edge of the mold base 13 . An end face of the mold base 13 has two stepped bosses, wherein the center of the uppermost step has a groove, and the inner diameter of the groove is the same as the outer diameter of the smallest boss on the lower end face of the casting mold 9, so that the casting mold 9 The lower end is embedded in the groove. The outer diameter of the second step of the mold base 13 is the same as the inner diameter of the base 12 and the same as the inner diameter of the quartz cover 7 . A pipe joint for connecting a mechanical pump is arranged at the center hole of the other end surface of the mold base.

A pair of radially protruding blocks are symmetrically distributed on the circumferential surface of the mold base 13 , and there are slots on the blocks for fixing the mold base 13 and the lifting device of the supporting frame.

The base 12 is also an annular disc. Mounting holes for three screw rods 14 are evenly distributed on the outer edge of the surface of the base 12 . The inner diameter of the base 12 is the same as that of the quartz cover 7 . There is an axially protruding sealing ring on the upper surface of the base 12, and the inner diameter of the sealing ring is the same as the outer diameter of the quartz cover 7; on the upper surface of the base 12, there are threads for fixing the base 12 to the support frame hole. A threaded hole is provided on the lower surface of the base 12 for fixing the base 12 with the mold base 13 .

When the casting device for preparing titanium-based amorphous composite materials is working, first turn on the cooling water switch to make the water cooling system start to work, and the cooling water flows into the water inlet chamber from the water inlet hole at the lower part of the casing of the sleeve 4, and passes through the water box A plurality of water inlet pipes are evenly distributed on the flange at the lower end of the core 6 to flow into the cooling water hole of each crucible flap, then into the water outlet cavity through the water outlet pipe inserted into the cooling water hole, and finally from the upper part of the casing of the sleeve 4 The outlet hole flows out.

After the cooling water system works stably, turn on the mechanical pump switch and the suction casting valve, and the suction casting valve is located between the mechanical pump and the casting device. The apparatus was evacuated through a fitting to a mechanical pump at the bottom end of the mold holder. Turn on the gas filling switch located between the argon cylinder and the injection port, and fill the device with argon through the injection port. Thereby realizing the functions of vacuuming and washing the furnace.

After completing the furnace cleaning work, close the suction casting valve and the gas charging switch, and maintain the specified air pressure in the device cavity. Then turn on the induction power switch, the induction coil starts to energize, and an induction eddy current will be generated on the surface of each crucible flap in the induction coil, thereby generating an induction magnetic field inside the entire water-cooled copper crucible. The alloy master ingot in the crucible is suspended and begins to melt.

After the solute treatment is completed, reduce the output current of the heating power supply to make the amorphous composite material alloy solution contact with the bottom of the crucible. Open the suction casting valve, and use the air pressure difference to cast the amorphous composite material alloy solution in the crucible into the mold cavity of the casting mold 9 through the suction casting hole at the lower end of the water-cooled copper crucible. It is also possible to turn on the inflatable switch, and use the high-speed air flow ejected from the injection port to blow the amorphous composite material alloy solution into the mold cavity of the casting mold 9 .

After the casting is completed, turn off the induction power switch, turn off the mechanical pump switch, loosen the screws used to fasten the base 12 and the mold seat 13, and take out the casting mold 9 and the amorphous material in the mold cavity by descending the lifting platform fixed with the mold seat. Composite rods.

After all the work is completed, turn off the main power supply and the cooling water switch.

Claims (9)

1. a titanium-based amorphous matrix material melting and casting method, it is characterized in that, detailed process is:

Step 1, the female ingot melting of alloy: purity is greater than Ti, Zr, Nb, Cu, Be of 99.9% under argon shield, carries out melting in two steps by arc-melting furnace:

The first step, melting TiZrNb alloy pig: adopt ordinary method that dystectic Ti, Zr, Nb are smelted into TiZrNb liquation; Described TiZrNb liquation cooled and solidified is made to become TiZrNb alloy pig;

Second step, the female ingot of smelting amorphous composite alloy: adopt ordinary method to be placed on by Cu and Be on the TiZrNb alloy pig after melt back; Melting is carried out to this TiZrNb alloy pig and Cu and Be be placed on this TiZrNb alloy pig, obtains Ti ₄₆zr ₂₀nb ₁₂cu ₅be ₁₇amorphous composite alloy molten solution; Described amorphous composite alloy molten solution cooled and solidified becomes the female ingot of amorphous composite alloy;

Keep induction stirring in melting, described induction stirring electric current is 10mA; In melting, in arc-melting furnace, be filled with 0.5 atmospheric argon gas; During described melting TiZrNb alloy pig, electric current is 450A, and smelting time is 5min; During described smelting amorphous composite alloy ingot, electric current is 400A, and smelting time is 5min;

Step 2, prepurging: the water jacketed copper crucible female for the amorphous composite alloy obtained ingot being put into water jacketed copper crucible spray/absorbing and casting device, adopt ordinary method prepurging: after the air pressure in water jacketed copper crucible spray/absorbing and casting device cavity is extracted into 4Pa, in cavity, is filled with Ar gas makes cavity internal gas pressure reach 1 × 10 ⁴pa, and repeatedly described in vacuumize → fill the prepurging process of Ar gas;

After completing above-mentioned prepurging, in water jacketed copper crucible spray/absorbing and casting device, be filled with Ar gas to 1.1 normal atmosphere, make cavity internal gas pressure a little more than the air pressure outside water jacketed copper crucible spray/absorbing and casting device cavity;

Step 3, solute process: adopt induction power supply to heat the female ingot of the amorphous composite alloy in water jacketed copper crucible spray/absorbing and casting device: to make the ruhmkorff coil of induction power supply be sleeved on described water jacketed copper crucible external peripheral surface by the position of cherry picker, and the spacing between described ruhmkorff coil and described water jacketed copper crucible external peripheral surface is 5 ~ 10mm, the distance between the end face of tip-to-face distance water jacketed copper crucible bottom, described ruhmkorff coil bottom is 15 ~ 20mm; During heating, power supply output frequency is 140KHz; The incoming frequency of described induction power supply is 50 ~ 60Hz, and input voltage is 380V, and oscillation frequency is 15 ~ 30KHz, and received current is 105A, and power input is 65KW, and coolant water temperature is 10 ~ 45 DEG C, and cooling water pressure is 0.15 ~ 0.3MPa;

During heating, outward current is reached maximum value 55A, be in suspended state under making the suspending power effect of the female ingot of alloy inducedmagnetic field in water jacketed copper crucible and start to melt; When the female ingot of alloy starts to melt, in 0.5min, electric power outputting current is at the uniform velocity down to 50A, makes the temperature of the female ingot of alloy in water jacketed copper crucible be 1000 ~ 1200 DEG C and keep 0.5 ~ 5min; Obtain the amorphous composite alloy solution through solute process;

Step 4, inhales casting: utilize in water jacketed copper crucible spray/absorbing and casting device cavity and the pressure difference inhaled between cast tube road, carries out suction casting to the amorphous composite alloy molten solution through solute process; When inhaling casting, the air pressure inhaled in cast tube is 4Pa; Reduce heating power supply outward current to 30A, described amorphous composite alloy molten solution is contacted with crucible bottom; Open the electromagnetic valve switch of mechanical pump in water jacketed copper crucible spray/absorbing and casting device, simultaneously close heating power supply at once, utilize cavity and to inhale in cast tube 10 ⁵alloy melt is inhaled by the suction blowhole that crucible bottom diameter is 8mm and is cast onto the copper mold be arranged in below crucible by the draught head of MPa, obtains amorphous composite alloy bar material; Step 5, the sampling of dismounting mould.

2., for a casting device for matrix material melting and casting method titanium-based amorphous described in claim 1, it is characterized in that, comprise water-cooling system, water jacketed copper crucible, casting mould, base and mold base; Described water-cooling system comprises water coolant box and is multiplely nested in the water-cooled tube formed in water inlet pipe by rising pipe; Described water coolant box is arranged on the top of quartz cover, and the port of the water inlet pipe of each water-cooled tube lower end is separately fixed at the water coolant aperture of water jacketed copper crucible upper surface, and the rising pipe of each water-cooled tube lower end inserts in the cooling water hole of water jacketed copper crucible upper surface; Water jacketed copper crucible and casting mould are all positioned at described quartz cover, and the upper end end joined of the lower end surface of described water jacketed copper crucible and casting mould; The lower end of described quartz cover is placed on base, and the lower end of described casting mould to be placed on mold base and to seal; Base is set with and is fixed on mold base; Top cover is positioned at the top of water coolant box; Be connected by screw rod between top cover and base; Mounting coil is on the shell of quartz cover, and corresponding with the position of the water jacketed copper crucible being positioned at quartz cover; The quantity of described water-cooled tube is identical with the quantity of water jacketed copper crucible lobe.

3. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 2, it is characterized in that, described water jacketed copper crucible is the water jacketed copper crucible be made up of 16 crucible lobes, size of cracking between each crucible lobe is respectively: cracking of water jacketed copper crucible inwall place is of a size of 0.4mm, cracking of water jacketed copper crucible outer wall place is of a size of 3.0mm, after making each water jacketed copper crucible lobe be combined as water jacketed copper crucible, cracking of this water jacketed copper crucible internal surface is less of to prevent alloy liquid from leaking; Cracking of this water jacketed copper crucible outside surface is larger to strengthen suspending power; Aperture is had to be the through hole of 8.0mm at water jacketed copper crucible bottom centre position, in order to realize the spray to cast of casting device and to inhale casting; Bottom described water jacketed copper crucible, there is annular recess outer face, spacing to mould by this groove, realizes the concentric of die cavity and spray to cast mouth.

4. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 2, it is characterized in that, described water coolant box comprises water box core, sleeve and water box top cover; Described water box core loads in sleeve in the mode of transition fit; Described water box top cover and sleeve upper end are connected, and described water box core lower end and sleeve lower end are connected; All seal between water box top cover and sleeve water box core; Cavity is formed between water box core external peripheral surface and the internal circular surfaces of sleeve; Dividing plate in the middle part of water box core and the internal surface of sleeve are sealed and matched, and are separated by the cavity between water box core external peripheral surface and the internal circular surfaces of sleeve by this dividing plate, define the water chamber on top and the intake antrum of bottom.

5. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 4, is characterized in that, described water box core external peripheral surface have the radial dividing plate protruded, the external diameter of this dividing plate is identical with the internal diameter of sleeve; Dividing plate in the middle part of described water box core is evenly equipped with the via hole of multiple rising pipe; The flange of described water box core lower end is evenly equipped with the via hole of multiple water inlet pipe; There is a posticum on the top of described cover cylinder shell, have a prosopyle in the bottom of cover cylinder shell; Angle between the medullary ray of described posticum and the medullary ray of prosopyle is 90 °; Have spray to cast hole at described water box top cover circumferential surface, the medullary ray in this spray to cast hole is mutually vertical with the medullary ray of water box top cover; The two ends in described spray to cast hole are connected with inlet pipe respectively.

6. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 3, it is characterized in that, a platform is had, placing graphite nozzle during for spraying/inhaling casting mobility poor aluminium alloy in the end, upper end of described water jacketed copper crucible bottom centre through hole.

7. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 1, is characterized in that, described casting mould is involuted by the semicircle parting lobe that two structures are identical; The external diameter of casting mould is less than the internal diameter of quartz cover; The center of casting mould is the die cavity identical with the shape of institute casting workpiece; Have the circular orientation platform axially protruded in the upper surface of described casting mould, this circular orientation platform matches with the annular recess bottom described water jacketed copper crucible, and what realize this casting mould is spacing; There is the clamping bench axially protruded at the two ends end face of described casting mould respectively, by steel ring cap on described clamping bench, two semicircle parting lobes are combined banding.

8. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 2, it is characterized in that, there is suction blowhole at the center of described mold base, is communicated with mechanical pump by pipeline; A stair-stepping boss of end face two-stage of this mold base, wherein the center of most upper level ladder is fluted, and the internal diameter of this groove is identical with the external diameter of the minimum boss in casting mould lower surface, makes the lower end of casting mould be inlaid in this groove; The external diameter of the second stage ladder of this mold base is identical with the internal diameter of base, and identical with the internal diameter of quartz cover; The central hole of another end face of this mold base has the tube stub for junctor tool pump; At the fixture block being distributed with a pair radial protrusion of the circumferential surface symmetry of described mold base, this fixture block there is the draw-in groove for being fixed by the lifting device of this mold base and bracing frame.

9. the casting device of titanium-based amorphous matrix material melting and casting method as claimed in claim 2, it is characterized in that, the outer rim of susceptor surface is evenly equipped with the open holes of three screw rods; The internal diameter of base is identical with the internal diameter of quartz cover; Have the wear ring axially protruded at described base upper surface, the internal diameter of sealing ring is identical with the external diameter of quartz cover; The threaded hole for this base and bracing frame being connected is had at described base upper surface; The threaded hole be connected with mold base is had in described base lower surface.