CN103834822B - Titanium-based amorphous matrix material melting and casting method and casting device - Google Patents
Titanium-based amorphous matrix material melting and casting method and casting device Download PDFInfo
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- CN103834822B CN103834822B CN201410070030.XA CN201410070030A CN103834822B CN 103834822 B CN103834822 B CN 103834822B CN 201410070030 A CN201410070030 A CN 201410070030A CN 103834822 B CN103834822 B CN 103834822B
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Abstract
A kind of titanium-based amorphous matrix material melting and casting method and casting device.Described titanium-based amorphous matrix material melting and casting method utilizes the stress effect in electromagnetic induction principle, by the alloy suspended in crucible in aerial fusing, avoids the pollution introduced with the contact of crucible, and achieves the control of alloy heated condition.At the end of fusion process, close heating power supply and open the magnetic valve inhaling casting or spray to cast simultaneously, what realize alloy solution fills type rapidly.In spray to cast process, realize the control to spray to cast speed by the size changing air pressure in gas-holder, and then prepared the amorphous composite of diverse microcosmic structure by control solidi fication process.Instant invention overcomes the defect existed in prior art, and integrate prior art to obtain the titanium-based amorphous matrix material of large size, simultaneously by realizing the stability contorting of technique to weave construction to the adjustment of the processing parameters such as temperature, soaking time, circulating-heating number of times and casting speed, obtain desirable optimization design structure.
Description
Technical field
The invention belongs to amorphous composite preparing technical field, in particular, provide a kind of melting and casting method of titanium-based amorphous matrix material and special casting device thereof.
Background technology
Non-crystaline amorphous metal is due to the atomic structure of its special longrange disorder, short range order, show the performance more excellent than traditional crystal alloy, superplasticity etc. in such as high strength, high rigidity, high anti-corrosion, excellent magnetic performance and certain temperature range, demonstrates huge using value in fields such as aerospace device, precision optical machinery and information.But because non-crystaline amorphous metal temperature-room type plasticity is poor, critical size is little, the widespread use of non-crystaline amorphous metal is made to be subject to larger restriction.The titanium-based amorphous matrix material utilizing spontaneous complex method to obtain has excellent low temperature, room temperature and mechanical behavior under high temperature, has possessed the great potential of practical application.The now conventional method preparing amorphous and amorphous composite has arc melting+copper mold; Induction melting+spray to cast; Quartz tube water quenching methods etc., often kind of method all has certain feature, also has certain limitation and shortcoming simultaneously.The amorphous composite size prepared by these methods is less, and cannot monitor the design parameter in melting and casting process accurately, and rely on the experience with operator to a certain extent, be thus unstable in performance.Relation for this reason theoretically between analysis process-tissue-performance, and then realize the Reasonable Regulation And Control to wild phase size and pattern by Controlling Technology parameter, the large size amorphous composite obtaining rock steady structure has realistic meaning clearly.
Traditional amorphous and the preparation of matrix material thereof have arc melting+copper mold (Inoue, A.andT.Zhang (1995). " FabricationofbulkyZr-basedglassyalloysbysuctioncastingin tocoppermold. " Materialstransactions-JIM36:1184-1187.), induction melting spray to cast (K ü hn, U., J.Eckert, etal. (2002). " ZrNbCuNiAlbulkmetallicglassmatrixcompositescontainingden driticbccphaseprecipitates. " Appliedphysicsletters80 (14): 2478-2480.) etc. method.On traditional preparation method basis, in order to overcome its all deficiency, people also been proposed the preparation method of various new amorphous and matrix material thereof.
The patent " suspended smelting and spray-casting process of preparing lumpy amorphous alloy (publication number CN1361298A) " of Shenyang Institute of Metal Research, Chinese Academy of Sciences proposes and will be placed on the alloy pig suspended smelting in V-arrangement quartz funnel by V-arrangement ruhmkorff coil, and obtains sheet non-crystalline material by the method for copper mold spray to cast.Invention uses the method suspended to prepare the problem of the impurity introducing that non-crystaline amorphous metal can be avoided usually running in ordinary method; the method of being cast by high-purity Ar gas blowout makes aluminium alloy contact as early as possible with mould; not only increase the speed of cooling of melt; and improve the fillibility of melt greatly; improve the precision of foundry goods, this research being us provides a thinking.If but also be there are some indeterminable problems in order to prepare the titanium-based amorphous matrix material of large size in the method: one place alloy V-arrangement quartz funnel at high temperature can with titanium generation strong reaction, still can composition be caused to be forbidden because of reacting when aluminium alloy can not suspend by suspended coil completely; The suspending power of the suspended coil of its two suspended coil is limited, thus also just limits amorphous composite foundry goods to large-sized development; Can be there is the problem of pore in the sample of its three spray to cast, affect the performance of foundry goods.
Lanzhou University of Science & Technology (Feng Liu. the preparation of copper-base lump non-crystalline alloy and performance test research thereof: [Lanzhou University of Science & Technology's master thesis]. Lanzhou: Lanzhou University of Science & Technology, 2004,7) inhale the method for casting by water jacketed copper crucible melting+upper end and prepare cu-base amorphous alloy and cu-base amorphous alloy matrix material.But adopt and also can there is certain problem in this way: one adopts upper end to inhale and has been cast as thermometric difficulty, the suction casting mould of upper end has blocked best temperature measurement location, so by controlling the control of melting voltage realization to different superheat level, and good corresponding relation can only can not be set up between melting voltage and melt actual temperature; Casting is inhaled in its two upper end to be needed very long silica tube to be inserted melt inside and could realize, can not be applicable to meeting and the titanium-based amorphous matrix material of quartzy kickback in this way; Raw material three is placed directly in water jacketed copper crucible to heat and often makes high-melting-point substances not melt completely and cause strong component segregation by it.
Summary of the invention
For overcome exist in prior art or be unsuitable for preparation large size titanium-based amorphous matrix material, or the deficiency of prepared titanium-based amorphous matrix material generation component segregation can be caused, the present invention proposes a kind of titanium-based amorphous matrix material melting and casting method and casting device.
Detailed process of the present invention 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 solution.Described amorphous composite alloy solution cooled and solidified becomes the female ingot of amorphous composite alloy.
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 described ruhmkorff coil 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 end face square 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, inhale casting:
Utilize in water jacketed copper crucible spray/absorbing and casting device cavity and the pressure difference inhaled between cast tube road, suction casting is carried out to the amorphous composite alloy 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 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.
The casting device for described titanium-based amorphous matrix material melting and casting method that the present invention proposes, comprises 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.
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.
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.
The dividing plate having radial protrusion of described water box core external peripheral surface, 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.
A platform is had, placing graphite nozzle during for spraying/inhaling casting mobility poor aluminium alloy in the end, upper end of described through hole.
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.
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, and the lower end of casting mould is 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.
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.
The present invention utilizes the stress effect in electromagnetic induction principle, by the alloy suspended in crucible in aerial fusing, avoids the pollution introduced with the contact of crucible, and can realize the control of alloy heated condition.At the end of fusion process, close heating power supply and open the magnetic valve inhaling casting or spray to cast simultaneously, what realize alloy solution fills type rapidly.In spray to cast process, the control to spray to cast speed can be realized by the size changing air pressure in gas-holder, and then the amorphous composite of diverse microcosmic structure can be prepared by control solidi fication process.
Water jacketed copper crucible in the present invention can the titanium-based amorphous composite alloy ingot of melting 300g.Simultaneously in order to increase the suspending power of crucible alloy, cracking between crucible lobe is designed to wedge structure, less of to prevent alloy liquid from leaking at the part of the pressing close to crucible inside width that cracks, the width that cracks outside crucible suitably increases to strengthen suspending power.In the perforate of crucible bottom central position, in order to realize spray to cast, to inhale the function of casting.Upper end, hole pot goes out the platform of, in order to spray, inhale casting mobility poor aluminium alloy time placing graphite nozzle.It is spacing in order to mould that crucible bottom opens endless groove, realize die cavity and spray to cast mouth to the heart.In order to place mould in crucible lower end by the design of the nested type water-cooling system of crucible on crucible top.
The mould proposed in the present invention, under the prerequisite of regulation outside dimension, can obtain the part of the bar of desired size, sheet material or even complicated shape by the shape changing die cavity; Sheet pore hole is had, to facilitate the discharge of mould intracavity gas in castingprocesses bottom mold base.Fastening at mould upper and lower shoulder stainless steel dead ring, thus prevent the crack of die when aluminium alloy is cast into die cavity.The ring-type platform of mould upper end can embed in the groove of crucible bottom and realize spacing object.
Due to the technique scheme taked, the present invention is had the following advantages:
1) achieve the integration of melting and casting process, simplify technological process; Alloy suspended melting can not contact with crucible by the method for water jacketed copper crucible suspended smelting, decreases the introducing of impurity, it also avoid the reaction between traditional induction melting spray to cast process interalloy and silica glass;
2) can the actual temperature of alloy melt in Accurate Determining crucible by infrared thermometer, thus by changing the control that faradic size and soaking time realize melt state, preparation process no longer relies on the subjective experience of operator;
3) control to spray to cast speed can be realized by controlling air pressure size in gas-holder, for research solidification path to surround and watch the impact of tissue on amorphous composite, the method of inhaling casting can obtain fills the more perfect amorphous composite of type, directly can obtain the amorphous composite part of complicated shape;
4) mould can carry out, with changing, can obtaining the amorphous composite of different shapes, size as required.After castingprocesses completes, mechanize delivery can be realized by lifting table; Higher alloy is required, the present invention is also supporting special water cooled copper mould and mold base thereof for cooling rate;
5) melting once can reach the alloy of 300g in water jacketed copper crucible, large-sized amorphous composite can be obtained in conjunction with spray, the means of inhaling casting.Can see employing the inventive method from accompanying drawing 12, can obtain that to fill the very complete diameter of type be 12mm, length is the titanium-based amorphous compound walking spa-cial system of large size of 140mm, for the practical application of titanium-based amorphous matrix material creates possibility.
In sum, instant invention overcomes the defect existed in prior art, and integrate prior art to obtain the titanium-based amorphous matrix material of large size, simultaneously by realizing the stability contorting of technique to weave construction to the adjustment of the processing parameters such as temperature, soaking time, circulating-heating number of times and casting speed, obtain desirable optimization design structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of casting device in the present invention, and wherein Fig. 1 a is front view, and Fig. 1 b is vertical view;
Fig. 2 is the structural representation of water box top cover;
Fig. 3 is the structural representation of water box cover;
Fig. 4 is the structural representation of water box core; Wherein Fig. 4 a is sectional view, and Fig. 4 b is front view;
Fig. 5 is the structural representation of water jacketed copper crucible; Wherein Fig. 5 a is sectional view, and Fig. 5 b is vertical view, and Fig. 5 c is the front view of water jacketed copper crucible crucible lobe, and Fig. 5 d is the vertical view of water jacketed copper crucible crucible lobe;
Fig. 6 is the structural representation of casting mould; Wherein Fig. 6 a is the front view of one of them parting lobe, and Fig. 6 b is the vertical view of casting mould;
Fig. 7 is the structural representation of base; The wherein A-A face sectional view of Fig. 7 a base, the B-B face sectional view of Fig. 7 b base, Fig. 7 c is the vertical view of base;
Fig. 8 is the structural representation of mold base; The wherein A-A face sectional view of Fig. 8 a mold base, the vertical view of Fig. 8 b mold base;
Fig. 9 is the XRD curve of the titanium-based amorphous compound walking spa-cial system of large size that embodiment one obtains;
Figure 10 is the microtexture of the titanium-based amorphous compound walking spa-cial system scanning electron microscope of large size that embodiment one obtains;
Figure 11 is the XRD curve of the titanium-based amorphous compound walking spa-cial system of large size that embodiment two obtains;
Figure 12 is the microtexture of the titanium-based amorphous compound walking spa-cial system scanning electron microscope of large size that embodiment two obtains;
Figure 13 is the XRD curve of the titanium-based amorphous compound walking spa-cial system of large size that embodiment three obtains;
Figure 14 is the microtexture of the titanium-based amorphous compound walking spa-cial system scanning electron microscope of large size that embodiment three obtains.
In accompanying drawing:
1. top cover; 2. glass cover; 3. water box top cover; 4. water box cover; 5. water nozzle; 6. water box core; 7. quartz cover; 8. water jacketed copper crucible; 9. mould; 10. inner pressure ring; 11. outer press rings; 12. bases; 13. mold bases; 14. king-bolts; 15. ruhmkorff coils
Embodiment
Embodiment one
The present embodiment is a kind of preparation method of titanium-based amorphous matrix material, and described amorphous composite composition is Ti
46zr
20nb
12cu
5be
15, the diameter that the method for inhaling casting by water jacketed copper crucible is made is Φ 12mm length is the bar of 140mm.The detailed process of the present embodiment 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.Described arc-melting furnace energy melting simultaneously 3 alloy pigs; The weight of each alloy pig is 30g.
The detailed process of the female ingot of molten alloy is:
The first step, melting TiZrNb alloy pig.First dystectic Ti, Zr, Nb are smelted into TiZrNb liquation; Close arc-melting furnace power supply, make described TiZrNb liquation cooled and solidified become TiZrNb alloy pig.The TiZrNb alloy pig obtained is spun upside down 180 °, makes the lower surface of this TiZrNb alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig, obtain the TiZrNb liquation through second time melting; Close arc-melting furnace power supply, described TiZrNb liquation is cooled again becomes TiZrNb alloy pig.Repeat said process, to described TiZrNb alloy pig melt back four times, to ensure the uniform composition of described TiZrNb alloy pig.
Second step, the female ingot of smelting amorphous composite alloy.Cu and Be is placed on the TiZrNb alloy pig after described melt back four times.Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig and Cu and Be be placed on this TiZrNb alloy pig, obtain Ti
46zr
20nb
12cu
5be
17amorphous composite alloy solution.Close arc-melting furnace power supply, make described amorphous composite alloy solution cooled and solidified become amorphous composite alloy pig.The amorphous composite alloy pig obtained is spun upside down 180 °, makes the lower surface of this amorphous composite alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this amorphous composite alloy pig, obtain the amorphous composite alloy molten solution through second time melting; Close arc-melting furnace power supply, described amorphous composite alloy molten solution is cooled again becomes amorphous composite alloy pig.Repeat said process, to described amorphous composite alloy pig melt back four times, obtaining atomic percent is Ti
46zr
20nb
12cu
5be
17the female ingot of amorphous composite alloy.
Induction stirring is kept 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, charging and prepurging: the water jacketed copper crucible female for the 120g amorphous composite alloy obtained ingot being put into water jacketed copper crucible spray/absorbing and casting device, after the air pressure in water jacketed copper crucible spray/absorbing and casting device cavity being extracted into 4Pa by mechanical pump, close mechanical pump manually-operated gate, in cavity, be filled with Ar gas make cavity internal gas pressure reach 1 × 10
4pa.Repeat above-mentionedly to vacuumize → fill Ar gas process 5 times, to reduce the oxygen level in cavity.It is described that above-mentioned to vacuumize → fill Ar gas process be prepurging.
After completing above-mentioned prepurging, Ar gas to 1.1 normal atmosphere is filled with in water jacketed copper crucible spray/absorbing and casting device, make cavity internal gas pressure a little more than the air pressure outside water jacketed copper crucible spray/absorbing and casting device cavity, to ensure not have in melting heat-processed the entering in water jacketed copper crucible spray/absorbing and casting device cavity of external oxygen.Meanwhile, because the pressure in water jacketed copper crucible spray/absorbing and casting device cavity is higher than suction casting manifold pressure, define pressure difference, can more promptly casting filling in follow-up suction casting process.
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.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.The ruhmkorff coil of induction power supply adopts the water-cooled copper coiling of external diameter 8mm to form, and the internal diameter of this ruhmkorff coil is 100mm, and the number of turn is 4, and spacing is 3mm.In the present embodiment, the incoming frequency of described induction power supply is 50Hz, and oscillation frequency is 30KHz, and received current is 105A, and power input is 65KW, and coolant water temperature is 20 DEG C, and cooling water pressure is 0.3MPa.
Described heat-processed is: make described ruhmkorff coil 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 end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 15 ~ 20mm.In the present embodiment, the spacing between described ruhmkorff coil and described water jacketed copper crucible external peripheral surface is 7.5mm, and the distance between the end face of end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 20mm.
During heating, power supply output frequency is 140KHz.
During heating, first 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 1100 DEG C and keep 0.5min.Obtain the amorphous composite alloy solution through solute process.
Add and hanker, by the temperature of the female ingot of alloy in infrared thermometer monitoring water jacketed copper crucible.
Step 4, inhale casting:
Utilize in water jacketed copper crucible spray/absorbing and casting device cavity and the pressure difference inhaled between cast tube road, suction casting is carried out to the amorphous composite alloy solution through solute process.When inhaling casting, the air pressure inhaled in cast tube is 4Pa.
When inhaling casting, reduce heating power supply outward current to 30A, described amorphous composite alloy 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, and to obtain diameter be Φ 12mm length is the amorphous composite alloy bar material of 140mm.Described suction blowhole can ensure that melt can not drip due to capillary effect in advance when contact with crucible bottom on the one hand, can avoid again due to the too small and suction casting rod material that is that cause of suction blowhole that to fill type imperfect.
Step 5, dismounting mould sampling: after melting and casting process completes, crucible and bracing frame are fixed, unclamp screw fixing between base and mold base, fall mould by lifting table and realize delivery.
Titanium-based amorphous condensation material prepared by the present embodiment is perfectly filled with whole die cavity, and the texture defect reflected in die cavity that can be more accurate, thus by the titanium-based amorphous matrix material changing mold cavity shapes, size can obtain different size shape, the part casting out design that even can be more accurate.XRD in accompanying drawing and displaing micro picture are the proof that the bar of gained provides Composition and structure.
Embodiment two
The present embodiment is a kind of preparation method of titanium-based amorphous matrix material, and described amorphous composite composition is Ti
48zr
20nb
12cu
5be
15, the diameter that the method for inhaling casting by water jacketed copper crucible is made is Φ 12mm length is the bar of 140mm.The detailed process of the present embodiment 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.Described arc-melting furnace energy melting simultaneously 3 alloy pigs; The weight of each alloy pig is 30g.
The detailed process of the female ingot of molten alloy is:
The first step, melting TiZrNb alloy pig.First dystectic Ti, Zr, Nb are smelted into TiZrNb liquation; Close arc-melting furnace power supply, make described TiZrNb liquation cooled and solidified become TiZrNb alloy pig.The TiZrNb alloy pig obtained is spun upside down 180 °, makes the lower surface of this TiZrNb alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig, obtain the TiZrNb liquation through second time melting; Close arc-melting furnace power supply, described TiZrNb liquation is cooled again becomes TiZrNb alloy pig.Repeat said process, to described TiZrNb alloy pig melt back four times, to ensure the uniform composition of described TiZrNb alloy pig.
Second step, the female ingot of smelting amorphous composite alloy.Cu and Be is placed on the TiZrNb alloy pig after described melt back four times.Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig and Cu and Be be placed on this TiZrNb alloy pig, obtain Ti
46zr
20nb
12cu
5be
17amorphous composite alloy solution.Close arc-melting furnace power supply, make described amorphous composite alloy solution cooled and solidified become amorphous composite alloy pig.The amorphous composite alloy pig obtained is spun upside down 180 °, makes the lower surface of this amorphous composite alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this amorphous composite alloy pig, obtain the amorphous composite alloy molten solution through second time melting; Close arc-melting furnace power supply, described amorphous composite alloy molten solution is cooled again becomes amorphous composite alloy pig.Repeat said process, to described amorphous composite alloy pig melt back four times, obtaining atomic percent is Ti
48zr
20nb
12cu
5be
15the female ingot of amorphous composite alloy.
Induction stirring is kept 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, charging and prepurging: the water jacketed copper crucible female for the 120g amorphous composite alloy obtained ingot being put into water jacketed copper crucible spray/absorbing and casting device, after the air pressure in water jacketed copper crucible spray/absorbing and casting device cavity being extracted into 4Pa by mechanical pump, close mechanical pump manually-operated gate, in cavity, be filled with Ar gas make cavity internal gas pressure reach 1 × 10
4pa.Repeat above-mentionedly to vacuumize → fill Ar gas process 5 times, to reduce the oxygen level in cavity.It is described that above-mentioned to vacuumize → fill Ar gas process be prepurging.
After completing above-mentioned prepurging, Ar gas to 1.1 normal atmosphere is filled with in water jacketed copper crucible spray/absorbing and casting device, make cavity internal gas pressure a little more than the air pressure outside water jacketed copper crucible spray/absorbing and casting device cavity, to ensure not have in melting heat-processed the entering in water jacketed copper crucible spray/absorbing and casting device cavity of external oxygen.Meanwhile, because the pressure in water jacketed copper crucible spray/absorbing and casting device cavity is higher than suction casting manifold pressure, define pressure difference, can more promptly casting filling in follow-up suction casting process.
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.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.The ruhmkorff coil of induction power supply adopts the water-cooled copper coiling of external diameter 8mm to form, and the internal diameter of this ruhmkorff coil is 100mm, and the number of turn is 4, and spacing is 3mm.In the present embodiment, the incoming frequency of described induction power supply is 50Hz, and oscillation frequency is 30KHz, and received current is 105A, and power input is 65KW, and coolant water temperature is 20 DEG C, and cooling water pressure is 0.3MPa.
Described heat-processed is: make described ruhmkorff coil 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 end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 15 ~ 20mm.In the present embodiment, the spacing between described ruhmkorff coil and described water jacketed copper crucible external peripheral surface is 7.5mm, and the distance between the end face of end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 20mm.
During heating, power supply output frequency is 140KHz.
During heating, first 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 46A, makes the temperature of the female ingot of alloy in water jacketed copper crucible be 1000 DEG C and keep 5min.Obtain the amorphous composite alloy solution through solute process.
Add and hanker, by the temperature of the female ingot of alloy in infrared thermometer monitoring water jacketed copper crucible.
Step 4, inhale casting:
Utilize in water jacketed copper crucible spray/absorbing and casting device cavity and the pressure difference inhaled between cast tube road, suction casting is carried out to the amorphous composite alloy solution through solute process.When inhaling casting, the air pressure inhaled in cast tube is 4Pa.
When inhaling casting, reduce heating power supply outward current to 30A, described amorphous composite alloy 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, and to obtain diameter be Φ 12mm length is the amorphous composite alloy bar material of 140mm.Described suction blowhole can ensure that melt can not drip due to capillary effect in advance when contact with crucible bottom on the one hand, can avoid again due to the too small and suction casting rod material that is that cause of suction blowhole that to fill type imperfect.
Step 5, dismounting mould sampling: after melting and casting process completes, crucible and bracing frame are fixed, unclamp screw fixing between base and mold base, fall mould by lifting table and realize delivery.
The titanium-based amorphous condensation material of the present embodiment by preparing at two-phase region Semi-solid Material Processing, can make original large dendritic crystal fuse in the insulation of two-phase region long period, broken, issues green-ball in the effect of water jacketed copper crucible magnetic stirring simultaneously.XRD in accompanying drawing and displaing micro picture are the proof that the bar of gained provides Composition and structure.
Embodiment three
The present embodiment is a kind of preparation method of titanium-based amorphous matrix material, and described amorphous composite composition is Ti
48zr
20nb
12cu
5be
15, the diameter that the method for inhaling casting by water jacketed copper crucible is made is Φ 12mm length is the bar of 30mm.The detailed process of the present embodiment 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.Described arc-melting furnace energy melting simultaneously 3 alloy pigs; The weight of each alloy pig is 30g.
The detailed process of the female ingot of molten alloy is:
The first step, melting TiZrNb alloy pig.First dystectic Ti, Zr, Nb are smelted into TiZrNb liquation; Close arc-melting furnace power supply, make described TiZrNb liquation cooled and solidified become TiZrNb alloy pig.The TiZrNb alloy pig obtained is spun upside down 180 °, makes the lower surface of this TiZrNb alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig, obtain the TiZrNb liquation through second time melting; Close arc-melting furnace power supply, described TiZrNb liquation is cooled again becomes TiZrNb alloy pig.Repeat said process, to described TiZrNb alloy pig melt back four times, to ensure the uniform composition of described TiZrNb alloy pig.
Second step, the female ingot of smelting amorphous composite alloy.Cu and Be is placed on the TiZrNb alloy pig after described melt back four times.Open arc-melting furnace power supply and melting is carried out to this TiZrNb alloy pig and Cu and Be be placed on this TiZrNb alloy pig, obtain Ti
46zr
20nb
12cu
5be
17amorphous composite alloy solution.Close arc-melting furnace power supply, make described amorphous composite alloy solution cooled and solidified become amorphous composite alloy pig.The amorphous composite alloy pig obtained is spun upside down 180 °, makes the lower surface of this amorphous composite alloy pig become upper surface; Open arc-melting furnace power supply and melting is carried out to this amorphous composite alloy pig, obtain the amorphous composite alloy molten solution through second time melting; Close arc-melting furnace power supply, described amorphous composite alloy molten solution is cooled again becomes amorphous composite alloy pig.Repeat said process, to described amorphous composite alloy pig melt back four times, obtaining atomic percent is Ti
48zr
20nb
12cu
5be
15the female ingot of amorphous composite alloy.
Induction stirring is kept 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 120g amorphous composite alloy obtained ingot being put into water jacketed copper crucible spray/absorbing and casting device, after the air pressure in water jacketed copper crucible spray/absorbing and casting device cavity being extracted into 4Pa by mechanical pump, close mechanical pump manually-operated gate, in cavity, be filled with Ar gas make cavity internal gas pressure reach 1 × 10
4pa.Repeat above-mentionedly to vacuumize → fill Ar gas process 5 times, to reduce the oxygen level in cavity.It is described that above-mentioned to vacuumize → fill Ar gas process be prepurging.
After completing above-mentioned prepurging, Ar gas to 1.1 normal atmosphere is filled with in water jacketed copper crucible spray/absorbing and casting device, make cavity internal gas pressure a little more than the air pressure outside water jacketed copper crucible spray/absorbing and casting device cavity, to ensure not have in melting heat-processed the entering in water jacketed copper crucible spray/absorbing and casting device cavity of external oxygen.Meanwhile, because the pressure in water jacketed copper crucible spray/absorbing and casting device cavity is higher than suction casting manifold pressure, define pressure difference, can more promptly casting filling in follow-up suction casting process.
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.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.The ruhmkorff coil of induction power supply adopts the water-cooled copper coiling of external diameter 8mm to form, and the internal diameter of this ruhmkorff coil is 100mm, and the number of turn is 4, and spacing is 3mm.In the present embodiment, the incoming frequency of described induction power supply is 50Hz, and oscillation frequency is 30KHz, and received current is 105A, and power input is 65KW, and coolant water temperature is 20 DEG C, and cooling water pressure is 0.3MPa.
Described heat-processed is: make described ruhmkorff coil 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 end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 15 ~ 20mm.In the present embodiment, the spacing between described ruhmkorff coil and described water jacketed copper crucible external peripheral surface is 7.5mm, and the distance between the end face of end face square water jacketed copper crucible bottom, described ruhmkorff coil bottom is 20mm.
During heating, power supply output frequency is 140KHz.
During heating, first 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 46A, makes the temperature of the female ingot of alloy in water jacketed copper crucible be 1200 DEG C and keep 2min.Obtain the amorphous composite alloy solution through solute process.
Add and hanker, by the temperature of the female ingot of alloy in infrared thermometer monitoring water jacketed copper crucible.
Step 4, inhale casting:
Utilize in water jacketed copper crucible spray/absorbing and casting device cavity and the pressure difference inhaled between cast tube road, suction casting is carried out to the amorphous composite alloy solution through solute process.When inhaling casting, the air pressure inhaled in cast tube is 4Pa.
When inhaling casting, reduce heating power supply outward current to 30A, described amorphous composite alloy solution is contacted with crucible bottom.
Open the electromagnetic valve switch of mechanical pump in water jacketed copper crucible spray/absorbing and casting device, close heating power supply at once simultaneously, alloy 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 utilizing cavity and inhale 105MPa in cast tube, and to obtain diameter be Φ 12mm length is the amorphous composite alloy bar material of 30mm.Described suction blowhole can ensure that melt can not drip due to capillary effect in advance when contact with crucible bottom on the one hand, can avoid again due to the too small and suction casting rod material that is that cause of suction blowhole that to fill type imperfect.
Step 5, dismounting mould sampling: after melting and casting process completes, crucible and bracing frame are fixed, unclamp screw fixing between base and mold base, fall mould by lifting table and realize delivery.
The titanium-based amorphous condensation material of the present embodiment by preparing at two-phase region Semi-solid Material Processing, in two-phase region insulation original large dendritic crystal can be made to fuse, broken, issue green-ball in the effect of water jacketed copper crucible magnetic stirring simultaneously.XRD in accompanying drawing and displaing micro picture are the proof that the bar of gained provides Composition and structure.
Embodiment four
The present embodiment is a kind of casting device for the titanium-based amorphous matrix material of described preparation, comprises water-cooling system, water jacketed copper crucible 8, casting mould 9, base 12 and mold base 13.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 7, 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 8 and casting mould 9 are all positioned at described quartz cover 7, and the upper end end joined of the lower end surface of described water jacketed copper crucible 8 and casting mould 9.The lower end of described quartz cover 7 is placed on base 12, and the lower end of described casting mould 9 to be placed on mold base 13 and to seal.Base 12 is set with and is fixed on mold base 13.Top cover 1 is positioned at the top of water coolant box.Be connected by screw rod 14 between top cover 1 and base 12.Coil 15 is sleeved on the shell of quartz cover 7, and corresponding with the position of the water jacketed copper crucible 8 being positioned at quartz cover 7.
The quantity of described water-cooled tube is identical with the quantity of water jacketed copper crucible lobe.
Described water jacketed copper crucible 8 is water jacketed copper crucible.This water jacketed copper crucible improves prior art and obtains.Described water jacketed copper crucible can the titanium-based amorphous composite alloy ingot of melting 300g.Water jacketed copper crucible 8 in the present embodiment is 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.Go out a platform at end, the upper end pot of described through hole, the diameter of this platform is 10.0mm, and the degree of depth is 1.0mm, placing graphite nozzle during for spraying/inhaling casting mobility poor aluminium alloy.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.
Described water coolant box comprises water box core 6, sleeve 4 and water box top cover 3.Described water box core 6 loads in sleeve 4 in the mode of transition fit, and water box top cover 3 is bolted on the flange of sleeve 4 upper end; The described flange of water box core 6 lower end and the flange of sleeve 4 lower end are connected.All seal between water box top cover 3 and sleeve 4 water box core 6.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 6 and the internal surface of sleeve 4 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.
The circular shell that described water box core 6 is made for brass.The internal diameter of water box core 6 is slightly less than the internal diameter of water jacketed copper crucible 8, to facilitate charging.All flange is had in the top and bottom of water box core 6.The dividing plate having radial protrusion of described water box core 6 external peripheral surface, the external diameter of this dividing plate is identical with the internal diameter of sleeve 4.Dividing plate in the middle part of described water box core 6 is evenly equipped with the via hole of multiple rising pipe.The flange of described water box core 6 lower end is evenly equipped with the via hole of multiple water inlet pipe.
The circular shell that described sleeve 4 is made for stainless steel.The internal diameter of sleeve 4 is identical with the external diameter of the dividing plate on water box core.All there is flange at the two ends of sleeve 4, and the flange at described sleeve two ends is evenly equipped with threaded hole.There is a posticum on the top of the housing of sleeve 4, have a prosopyle in the bottom of the housing of sleeve 4; Angle between the medullary ray of described posticum and the medullary ray of prosopyle is 90 °.
The circle ring disk that described water box top cover 3 is made for stainless steel.The external diameter of water box top cover 3 is identical with the external diameter of sleeve 4 upper flanges; The internal diameter of water box top cover 3 is identical with the internal diameter of water box core 6.Have spray to cast hole at described water box top cover 3 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.
Described casting mould 9 is involuted by the semicircle parting lobe that two structures are identical.The external diameter of casting mould 9 is less than the internal diameter of quartz cover.The center of casting mould 9 is die cavity, and the shape of this die cavity is identical with the shape of institute casting workpiece.Have the circular orientation platform axially protruded in the upper surface of described casting mould 9, 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.
Described mold base 13 is hollow disc shape.There is suction blowhole at the center of mold base 13, is communicated with mechanical pump by pipeline.The outer rim of mold base 13 is distributed with the threaded hole for connecting base 12.A stair-stepping boss of end face two-stage of this mold base 13, 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 9 lower surface, and the lower end of casting mould 9 is inlaid in this groove.The external diameter of the second stage ladder of this mold base 13 is identical with the internal diameter of base 12, and identical with the internal diameter of quartz cover 7.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 13, this fixture block there is the draw-in groove for being fixed with the lifting device of bracing frame by this mold base 13.
Base 12 is also circle ring disk.The outer rim on base 12 surface is evenly equipped with the open holes of three screw rods 14.The internal diameter of base 12 is identical with the internal diameter of quartz cover 7.Have the wear ring axially protruded at described base 12 upper surface, the internal diameter of sealing ring is identical with the external diameter of quartz cover 7; The threaded hole for being connected with bracing frame by this base 12 is had at described base 12 upper surface.Threaded hole is had, for being connected with mold base 13 by this base 12 at described base 12 lower surface.
The casting device of the titanium-based amorphous matrix material of described preparation operationally, first cooling water switch is opened, water-cooling system is started working, water coolant flows into intake antrum from the prosopyle of the lower housing portion of sleeve 4, on the flange of water box core 6 lower end, be evenly equipped with multiple water inlet pipe flows in the cooling water hole of each crucible lobe, then entered the rising pipe inserted in cooling water hole and flowed into water chamber, finally flowed out from the posticum of the housing upper of sleeve 4.
After cooling water system steady operation, open mechanical pump switch and inhale casting valve, described suction casting valve is between mechanical pump and described casting device.By the tube stub of the connection mechanical pump of the bottom end face of mold base, described device is vacuumized.Open the gas-filled switching tube between argon bottle and spray to cast mouth, in device, be filled with argon gas by spray to cast mouth.Thus realize vacuumizing the function with prepurging.
Close after completing prepurging work and inhale casting valve and gas-filled switching tube, in device cavity, keep the air pressure of regulation.Then induction power supply switch is opened, ruhmkorff coil starts energising, each crucible lobe surface in ruhmkorff coil can produce inductive loop, thus produce inducedmagnetic field in whole water jacketed copper crucible inside, make the female ingot of alloy be placed in water jacketed copper crucible be in suspended state and start to melt by the heat effect of inducedmagnetic field and stress effect.
After solute process completes, reduce heating power supply outward current and arrive, described amorphous composite alloy solution is contacted with crucible bottom.Open and inhale casting valve, utilize draught head to be cast in the die cavity of casting mould 9 by the suction blowhole of the amorphous composite alloy solution in crucible by water jacketed copper crucible lower end.Also can open gas-filled switching tube, amorphous composite alloy solution is blown in the die cavity of casting mould 9 by the high velocity air utilizing spray to cast mouth to spray.
After having cast, close induction power supply switch, close mechanical pump switch, unclamp the screw for fastening seat 12 and mold base 13, by declining, the lifting table be fixed together with mold base takes out amorphous composite bar in casting mould 9 and die cavity.
Closedown general supply and cooling water switch after all working completes.
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.
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| CN105903931B (en) * | 2016-05-04 | 2018-03-06 | 上海大学 | The high flux preparation facilities and method of array block amorphous alloy |
| CN106086716A (en) * | 2016-06-03 | 2016-11-09 | 西北工业大学 | A kind of Ti Zr Nb Cu Be system amorphous composite material and preparation method thereof |
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| CN110118679A (en) * | 2019-04-30 | 2019-08-13 | 西北工业大学 | A kind of temperature is up to 1600 DEG C of magnetic field material processing unit |
| CN114101628A (en) * | 2021-12-07 | 2022-03-01 | 兰州理工大学 | Amorphous alloy gear and casting mold and method thereof |
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