CN110514004A - Directional solidification smelting equipment and method for refractory high-entropy alloy - Google Patents
Directional solidification smelting equipment and method for refractory high-entropy alloy Download PDFInfo
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- CN110514004A CN110514004A CN201910808609.4A CN201910808609A CN110514004A CN 110514004 A CN110514004 A CN 110514004A CN 201910808609 A CN201910808609 A CN 201910808609A CN 110514004 A CN110514004 A CN 110514004A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
- F27B2014/045—Vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/13—Smelting
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Abstract
The invention discloses directional solidification smelting equipment for refractory high-entropy alloy, which comprises a quartz glass tube, a smelting crucible, an induction coil and a smelting power supply, wherein alloy raw materials are filled in the smelting crucible and are positioned in the quartz glass tube, the induction coil is connected with the smelting power supply, is sleeved outside the quartz glass tube and is used for smelting the alloy raw materials in the smelting crucible, the directional solidification smelting equipment also comprises a lifting device, and the induction coil is connected with the lifting device and is driven by the lifting device to lift up and down along the quartz glass tube. The invention also discloses a smelting method of the refractory high-entropy alloy, and the smelting method has the advantages that the smelted alloy ingot is regular in forming, uniform in internal structure, and concentrated in defects such as shrinkage cavity and shrinkage porosity.
Description
Technical field
The present invention relates to the directional solidification smelting equipments of alloy melting field more particularly to a kind of infusibility high-entropy alloy and molten
Smelting method.
Background technique
High temperature alloy is the key structure material of aerospace and field of industrial power, has become dual-use high-temperature fuel gas turbine
Not replaceable a kind of material, it is highly important to pushing industry and human civilization progress to play the role of.Especially in military domain,
With the continuous promotion of military aircraft performance requirement, ratio of the high temperature alloy in engine material is higher and higher, and pairing
Higher requirements are also raised for golden performance, such as higher elevated temperature strength and specific strength, higher use temperature etc..High temperature
Nickel-base alloy is most mature high-temperature structural material, by the continuous iteration optimization of ingredient and technique, uses temperature and high temperature
Intensity has obtained continuous promotion.But it is limited by the fusing point of nickel (1455 DEG C), the use temperature of nickel-base alloy Inconel 718 is difficult
More than 1250 DEG C, mechanical behavior under high temperature potentiality almost have arrived at the limit.Therefore, continue to mention operation at high temperature need it is a kind of complete
New high temperature alloy system.
High-entropy alloy (High Entropy Alloys, abbreviation HEAs) is that the one kind proposed in recent years has excellent mechanical
The alloy concept of performance.The high-entropy alloy definition of broad sense refers to and is made of 4 kinds and the above pivot, constituent element content between 5%~35% it
Between alloy.And in all high-entropy alloy groups, the potential You Liang great group used as thermal structure is base respectively
In 3d magnesium-yttrium-transition metal 3d transition group high-entropy alloy (3d-transition Metals HEAs, abbreviation TM HEAs) and be based on
The infusibility high-entropy alloy (Refractory HEAs, abbreviation RHEAs) of refractory metal.Wherein the major components of RHEAs from Ti,
V, 9 kinds of refractory metals of Cr, Zr, Nb, Mo, Hf, Ta and W, and they all have higher fusing point, therefore RHEAs is obviously more high
The lower potentiality applied of temperature.In fact for first RHEAs system NbTaMoW when being suggested within 2010, mechanical behavior under high temperature is just
Surprising level is reached, yield strength (the O.N. Senkov, G.B. of 400MPa or more is still maintained at 1600 DEG C
Wilks, J.M. Scott, and D.B. Miracle: Mechanical properties of Nb25Mo25Ta25W25
and V20Nb20Mo20Ta20W20 refractory high entropy alloys. Intermetallics 19, 698
(2011)).With the exploration to more RHEAs, more elevated temperature strengths are higher and the acceptable RHEAs system of temperature-room type plasticity
It is found, many systems show the huge advantage for having substitution nickel base superalloy.
Although many systems are exploited, in the achievement that most of researchs are delivered, the preparation process of blocky RHEAs is very single
One.Electric arc melting is most commonly used smelting technology, and method is mature and largely effective to the fusing of refractory metal raw material, is used
Cooling velocity is exceedingly fast therefore is easy to get single phase solid solution structure in the melting of RHEAs when water cooled copper mould crucible.But the technique
Heating method be point heating, cooperation bottom water cooled copper mould heat dissipation, therefore melting raw material can not be in a molten state simultaneously is therefore difficult
To guarantee to stir evenly.In addition RHEAs constituent element different melting points are larger, and this heating and radiating mode will lead to and produce in alloy pig
Raw large range of liquid-solid two-phase mixed zone, apparent successively solidification can be presented in local when solidification, lead to the contracting dispersed on a large scale
Pine and element segregation, cause infusibility high-entropy alloy nonuniform organization, defect not to concentrate and shape hardly possible using electric arc melting technique
Degree is big.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of alloy structure uniformly, defect
Concentrate and shape the directional solidification smelting equipment and method of smelting of the small infusibility high-entropy alloy of difficulty.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of directional solidification smelting equipment of infusibility high-entropy alloy, including quartz glass tube, melting kettle, induction coil and melting
Power supply, the melting kettle are provided with alloy raw material and are located inside quartz glass tube, and the induction coil and melting power supply connect
It connects and is sheathed on outside quartz glass tube and for the alloy raw material in melting melting kettle, the directional solidification smelting equipment is also
Including lifting device, the induction coil connect with lifting device and rises above and below quartz glass tube under the driving of lifting device
Drop.
As further improvement to above-mentioned technical proposal:
The lifting device includes lifting support, lift strut and driving motor, the lift strut be connected to driving motor and
Between lifting support, lifting support oscilaltion under the driving of driving motor, the induction coil and lifting support connect
Connect fixation.
The melting kettle is column crucible.
Hollow channel is equipped in the induction coil, the directional solidification smelting equipment further includes cooling water recirculation system,
Cooling water recirculation system is connected with the hollow channel of induction coil, and provides in recirculated cooling water to hollow channel.
The directional solidification smelting equipment further includes temperature measuring equipment and computer, and the temperature measuring equipment is for measuring melting earthenware
The temperature of alloy raw material in crucible, the computer are connected with temperature measuring equipment and are used to record the temperature that temperature measuring equipment measurement obtains
Data.
The directional solidification smelting equipment further includes protective gas source, and the quartz glass tube is equipped with air inlet, the guarantor
Shield gas source is connected with air inlet and provides protective gas.
The directional solidification smelting equipment further includes vacuum pump, and the quartz glass tube is equipped with bleeding point, the vacuum pump
It is connected with bleeding point.
The inventive concept total as one, the present invention provide a kind of directional solidification method of smelting of infusibility high-entropy alloy, packet
Include following steps:
S1, it pretreated alloy raw material is placed in melting kettle is placed in quartz glass tube, it will be in quartz glass tube
It vacuumizes and is filled with protective gas；
S2, open the Power melting alloy raw material of melting after, then open driving motor drive lifting support rise, make induction coil with
Speed v0It is moved up below from melting kettle, until the bottom of induction coil is moved to above melting kettle or melted alloy
Ingredient upper surface has solidified, and melting power supply is closed, wherein 0 < v0≤1.2mm/s；
S3, melting kettle is taken out after quartz glass tube is cooling, demoulds, obtains the alloy pig of directional solidification.
As further improvement to above-mentioned technical proposal:
In the step S1, it is described will be vacuumized in quartz glass tube and be filled with protective gas specifically includes the following steps:
S1-1, open vacuum pump by quartz glass tube be evacuated to pressure reach -0.099MPa hereinafter, open protective gas source to
It is passed through protective gas in quartz glass tube, closes the valve between vacuum pump and quartz glass tube, is connect to quartz glass tube air pressure
The valve between vacuum pump and quartz glass tube is opened after nearly external atmosphere pressure, is taken out quartz glass tube air pressure and is reached -0.099MPa；
S1-2, repeatedly step S1-1 2 times or more；
S1-3, continue to be passed through protective gas into quartz glass tube with preset flow, while vacuum pump takes out very quartz glass tube
Sky, i.e. holding quartz glass overpressure are constant and protective gas is flowing.
Preferably, in the step S1-2, the number of repetition of step S1-1 is 2-5 times.
In the step S1, the pretreatment is specifically includes the following steps: alloy raw material progress electric arc melting has been obtained
The alloy pig of full alloying, then the alloy pig of alloying is processed into pre-set dimension, obtain pretreated alloy raw material.
In the step S1, the melting kettle is high temperature resistant (at least 2500 DEG C+, preferably 3000 DEG C+), can demould
Crucible, it is preferable that the melting kettle is boron nitride crucible or graphite crucible.
The step S2 specifically includes the following steps:
S2-1, melting power supply is being opened, is observing alloy raw material state, when alloy raw material heating is painstaking, it is strong to increase melting electric current
Degree, thorough melted alloy raw material obtain melt；
S2-2, melting current strength is kept, stirring melt excludes air and makes melt full of melting kettle；
S2-3, melting current strength is reduced, melt is kept to be in molten state；
S2-4, driving motor drive lifting support rising is opened, makes induction coil with speed v0To moving up below the melting kettle
It is dynamic, until the bottom of induction coil is moved to above melting kettle or melted alloy ingredient upper surface has solidified, close molten
Power supply is refined, wherein 0 < v0≤1.2mm/s。
In the step S2-2, the melt stirs under the action of electromagnetic force, and mixing time is 3min~5min.
The step S3's specifically includes the following steps:
S3-1, after quartz glass tube is cooled to 200 DEG C or less, close flow vacuum pump, open quartz glass tube air inlet be filled with
Then pressure inside and outside air balance chamber removes quartz glass tube and takes out melting kettle, obtains alloy pig crude product；
S3-2, demoulding remove alloy pig crude product surface oxide layer and obtain the alloy of directional solidification with the conversion zone of melting kettle
Ingot.
Compared with the prior art, the advantages of the present invention are as follows:
1. the directional solidification smelting equipment and method of smelting of infusibility high-entropy alloy of the invention, the sense for molten alloy raw material
Answer coil to connect with lifting device and under the driving of lifting device along quartz glass tube oscilaltion, when induction coil from lower and
When upper mobile, can melting obtain defect concentrate on top directional solidification alloy pig, the alloy melt after fusing is from the bottom to top
Consecutive solidification so that the contraction in process of setting can obtain the supplement of top melt, thus except top down~area 10mm
Domain internal shrinkage collection China and foreign countries, other area defects are few.
2. the alloy pig that the directional solidification smelting equipment of infusibility high-entropy alloy of the present invention and method of smelting melting obtain closes
Payment organization is highly uniform, and when molten alloy, alloy raw material is in electromagnetic field and is integrally heated, induction coil movement speed v0It is full
0 < v of foot0≤ 1.2mm/s so that the cooling velocity of each region is almost the same when solidification, therefore can guarantee phase group everywhere
At the consistency with grain size.
3. the alloy pig that the directional solidification smelting equipment of infusibility high-entropy alloy and method of smelting melting obtain in the present invention,
Its shape can be controlled by designing different melting kettle molds, can mend temperature set using graphite or conductive boron nitride to supplement
Coupling to guarantee heating effect, if be not concerned about carbon pollution or chamber in deaerating effect it is splendid when, can directly use graphite jig
Melting is carried out, cost is lower and electromagnetic field couples effect is good.
Detailed description of the invention
Fig. 1 is the schematic diagram of directional solidification smelting equipment of the present invention.
Fig. 2 is the connection schematic diagram of lifting device and cooling water recirculation system in directional solidification smelting equipment kind of the present invention.
Fig. 3 is the appearance photo that alloy pig is finally made in the embodiment of the present invention 1.
Fig. 4 is the design drawing of melting kettle in the embodiment of the present invention 1.
Fig. 5 is the design drawing of melting kettle in other embodiments of the invention.
Fig. 6 is the design drawing of melting kettle in other embodiments of the invention.
Fig. 7 is the metallographic microscope that alloy pig longitudinal section is finally made in the embodiment of the present invention 1.
Fig. 8 is the metallographic microscope that alloy pig longitudinal section is finally made in the embodiment of the present invention 2.
Fig. 9 is the metallographic microscope that alloy pig longitudinal section is finally made in the embodiment of the present invention 3.
Each label indicates in figure:
1, alloy raw material；2, melting kettle；3, boron nitride cushion block；4, graphite cushion block；5, quartz glass tube；6, bleeding point；7, bottom
Seat；8, air inlet；9, protective gas source；10, induction coil；11, melting power supply；12, vacuum pump；13, temperature measuring equipment；14, it counts
Calculation machine；15, lifting device；151, lifting support；152, lift strut；153, driving motor；16, cooling water recirculation system；17,
Outer benefit temperature set.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.Except no special theory
Bright, the instrument or material that the present invention uses is commercially available.
Embodiment 1
A kind of directional solidification smelting equipment of infusibility high-entropy alloy of the invention, including quartz glass tube 5, melting kettle 2, induction
Coil 10 and melting power supply 11, melting kettle 2 be provided with alloy raw material 1 and be located at quartz glass tube 5 inside, induction coil 10 with
Melting power supply 11 connects and is sheathed on 5 outside of quartz glass tube and for the alloy raw material 1 in melting melting kettle 2, and orientation is solidifying
Gu smelting equipment further includes lifting device 15, induction coil 10 connect with lifting device 15 and in the driving lower edge of lifting device 15
5 oscilaltion of quartz glass tube.
In the present embodiment, quartz glass tube 5 is hollow quartz ampoule, and quartz glass tube 5 is fixed on vertically on pedestal 7, and is led to
It crosses steel flange pressure rubber ring and causes expansion fitting 5 tube wall of quartz glass tube sealing.
Lifting device 15 includes lifting support 151, lift strut 152 and driving motor 153, and lift strut 152 is connected to
Between driving motor 153 and lifting support 151, the oscilaltion under the driving of driving motor 153 of lifting support 151, the line of induction
Circle 10 is connected and fixed with lifting support 151.
Melting kettle 2 is column crucible.
Hollow channel is equipped in induction coil 10, directional solidification smelting equipment further includes cooling water recirculation system 16, cooling
Water circulation system 16 is connected with the hollow channel of induction coil 10, and provides in recirculated cooling water to hollow channel.
Directional solidification smelting equipment further includes temperature measuring equipment 13 and computer 14, and temperature measuring equipment 13 is for measuring melting kettle
The temperature of alloy raw material 1 in 2, computer 14 are connected with temperature measuring equipment 13 and measure obtained temperature for recording temperature measuring equipment 13
Degree evidence.In the present embodiment, temperature measuring equipment 13 is infrared temperature measuring head, and computer 14 can be used for recording temperature lift-down curve
Directional solidification smelting equipment further includes protective gas source 9, and quartz glass tube 5 is equipped with air inlet 8, protective gas source 9 with into
Port 8 is connected and provides protective gas.In the present embodiment, air inlet 8 is set to the top of quartz glass tube 5, using rubber
Pipe sleeve lives to seal, and vacuum grease is uniformly smeared in joint.In the present embodiment, protective gas source 9 is argon gas source.
Directional solidification smelting equipment further includes vacuum pump 12, and quartz glass tube 5 is equipped with bleeding point 6, vacuum pump 12 and pumping
Mouth 6 is connected.In the present invention, bleeding point 6 is set to the lower part of quartz glass tube 5, entangles sealing using rubber tube, joint is equal
Even smearing vacuum grease.
In the present embodiment, infusibility high-entropy alloy is NbZrTiV alloy.
A kind of directional solidification method of smelting of the infusibility high-entropy alloy of the present embodiment, comprising the following steps:
1) electric arc melting RHEAs.NbZrTiV alloy is placed in arc-melting furnace, melting to complete alloying, diameter < 20mm
The small ingot of round or ellipse alloy.
2) preparation of smelting equipment.
2.1 prepare the boron nitride crucible of internal diameter d1=20mm as shown in Figure 4, H1=50mm as melting kettle 2, by melting earthenware
2 inner wall of crucible is immersed in be placed in ultrasonic cleaning machine in alcohol after polishing smooth vibrates 10min, is subsequently placed in baking oven 80 DEG C
Dry 30min.
In the present embodiment, 1=30mm of outer diameter D of melting kettle 2, thickness l1=l2=5mm in other embodiments can bases
The shape and size of subject alloy ingot make corresponding melting kettle 2, as 15mm≤d1≤25mm, 50mm≤H1≤100mm
When, it can obtain the same or similar technical effect.
In other embodiments, 2 outer wall of melting kettle is coated with outer benefit temperature set 17, as shown in Fig. 5 or 6, wherein D1=
30mm, d1=10.4mm, d2=20mm, d3=25.4mm, l1=7.5mm, l2=l3=5mm, l4=l4=2.5mm, H1=67.5mm, l4=
19.8mm, r1=9.5mm.Melting kettle 2 is boron nitride crucible, and outer benefit temperature set 17 is graphite cannula or conductive boron nitride set, outer benefit temperature
Set 17 is for supplementing coupling to guarantee heating effect.
2.2 are placed in alloy small ingot in melting kettle 2, put up melting platform, and graphite cushion block 4 is placed in quartz glass
5 bottom of pipe, boron nitride cushion block 3 is placed on graphite cushion block 4, then melting kettle 2 is placed on boron nitride cushion block 3, then is pressed
Step prepurging simultaneously sets flowing argon atmosphere in furnace as required, and specific step is as follows；
Opening vacuum pump 12 is evacuated to gauge pressure and reaches -0.099MPa hereinafter, using argon gas source as protective gas source 9, opens argon
Air valve closes the vacuum valve of vacuum pump 12, is slowly filled with argon gas, rises to air pressure in quartz glass tube 5 close to external atmosphere pressure
The vacuum valve for opening vacuum pump 12 afterwards takes out gas to gauge pressure in quartz glass tube 5 and reaches -0.099MPa.Applying argon gas again, and repeat
Prepurging operation 2 times or more.After the completion of prepurging, continue to be filled with argon gas with appropriate flow, while vacuum pump 12 continues to take out quartz glass
Atmosphere in pipe 5 keeps low vacuum in quartz glass tube 5 and has flowing argon atmosphere.
Gauge pressure is -0.099MPa in the present embodiment, and in other embodiments, gauge pressure can obtain identical less than -0099MPa
Or similar technical effect, in fact, gauge pressure is the smaller the better.
3) induction melting and coagulation forming.Melting power supply 11 is opened, gradually tunes up 11 power of melting power supply to alloy melting,
Melting current strength is 400A at this time, obtains alloy melt.The state 3min for keeping alloy melt to melt and being stirred in electromagnetic field,
Then it turns melting electric current down and then opens the drive of lifting device 15 so that alloy melt is in the state melted just to 350A
Dynamic motor 153, adjusts rate of climb v0Increase induction coil 10 to 0.4mm/s, it is to be seen to be left to 10 bottom of induction coil
The driving motor 153 of melting power supply 11 and lifting device 15 is closed after the horizontal plane of alloy melt surface.
4) terminate melting and alloy demoulding.Cooling 20min is solidified to alloy melt, is cooled to 200 DEG C to quartz glass tube 5
After below, closes flowing argon gas and be filled with, close vacuum pump 12, open air inlet 8 and be filled with external pressure in air balance quartz glass tube 5
By force, it then removes quartz glass tube 5 and takes out melting kettle 2, demoulding obtains the alloy pig after directional solidification, and surface sand-blasting goes deoxygenation
Change and conversion zone obtains clean alloy pig.
Alloy pig longitudinal section is cut with wire cutting, shrinkage cavity size, shape and distribution on the face, knot are observed after mill metallographic
Fruit is as shown in Figure 7, it is seen that shrinkage cavity concentrates at the top of alloy pig, other regio defects are considerably less.
Embodiment 2
The directional solidification smelting equipment for the infusibility high-entropy alloy that the present embodiment uses is same as Example 1.
A kind of directional solidification method of smelting of infusibility high-entropy alloy of the present embodiment is roughly the same with embodiment 1, difference
Be in: in induction melting, 10 rate of climb v of induction coil0For 1.2mm/s.
Alloy pig longitudinal section is cut with wire cutting, shrinkage cavity size, shape and distribution on the face, knot are observed after mill metallographic
Fruit is as shown in Figure 8, it is seen that shrinkage cavity is mainly distributed on the top half of alloy pig, lower half portion shrinkage cavity negligible amounts.
Embodiment 3
The directional solidification smelting equipment for the infusibility high-entropy alloy that the present embodiment uses is same as Example 1.
A kind of directional solidification method of smelting of infusibility high-entropy alloy of the present embodiment is roughly the same with embodiment 1, difference
Be in: in induction melting, 10 rate of climb v of induction coil0For 3.6mm/s.
Alloy pig longitudinal section is cut with wire cutting, shrinkage cavity size, shape and distribution on the face, knot are observed after mill metallographic
Fruit is as shown in Figure 9, it is seen that the distribution of alloy pig internal shrinkage relatively disperses, and quantity is more, and the position mainly concentrated is in the middle part of alloy pig.
Although the present invention is disclosed as above with preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (10)
1. a kind of directional solidification smelting equipment of infusibility high-entropy alloy, including quartz glass tube (5), melting kettle (2), the line of induction
(10) and melting power supply (11) are enclosed, the melting kettle (2) is provided with alloy raw material (1) and is located at quartz glass tube (5) inside,
The induction coil (10) connect and is sheathed on melting power supply (11) quartz glass tube (5) outside and for melting melting kettle
(2) alloy raw material (1) in, it is characterised in that: the directional solidification smelting equipment further includes lifting device (15), the induction
Coil (10) is connect and under the driving of lifting device (15) along quartz glass tube (5) oscilaltion with lifting device (15).
2. the directional solidification smelting equipment of infusibility high-entropy alloy according to claim 1, it is characterised in that: the lifting device
It (15) include lifting support (151), lift strut (152) and driving motor (153), the lift strut (152) is connected to drive
Between dynamic motor (153) and lifting support (151), the lifting support (151) rises up and down under the driving of driving motor (153)
Drop, the induction coil (10) are connected and fixed with lifting support (151).
3. the directional solidification smelting equipment of infusibility high-entropy alloy according to claim 2, it is characterised in that: the melting kettle
It (2) is column crucible.
4. the directional solidification smelting equipment of infusibility high-entropy alloy according to claim 2, it is characterised in that: the induction coil
(10) hollow channel is equipped in, the directional solidification smelting equipment further includes cooling water recirculation system (16), cooling water cyclic system
System (16) is connected with the hollow channel of induction coil (10), and provides in recirculated cooling water to hollow channel.
5. according to claim 1 to the directional solidification smelting equipment of infusibility high-entropy alloy described in any one of 4, it is characterised in that:
The directional solidification smelting equipment further includes temperature measuring equipment (13) and computer (14), and the temperature measuring equipment (13) is molten for measuring
The temperature of crucible (2) interior alloy raw material (1) is refined, the computer (14) is connected with temperature measuring equipment (13) and for recording thermometric dress
It sets (13) and measures obtained temperature data.
6. according to claim 1 to the directional solidification smelting equipment of infusibility high-entropy alloy described in any one of 4, it is characterised in that:
The directional solidification smelting equipment further includes protective gas source (9), and the quartz glass tube (5) is equipped with air inlet (8), the guarantor
Shield gas source (9) is connected with air inlet (8) and provides protective gas.
7. the directional solidification smelting equipment of infusibility high-entropy alloy according to claim 6, it is characterised in that: the directional solidification
Smelting equipment further includes vacuum pump (12), and the quartz glass tube (5) is equipped with bleeding point (6), the vacuum pump (12) and pumping
Mouth (6) is connected.
8. a kind of directional solidification method of smelting of infusibility high-entropy alloy, it is characterised in that: the following steps are included:
S1, pretreated alloy raw material (1) is placed in melting kettle (2) and is placed in quartz glass tube (5), it will be quartzy
It vacuumizes in glass tube (5) and is filled with protective gas；
After S2, opening melting power supply (11) melted alloy raw material (1), then opens driving motor (153) and drive lifting support (151)
Rise, makes induction coil (10) with speed v0It is moved up below from melting kettle (2), until the bottom of induction coil (10) is moved
It moves above melting kettle (2) or melted alloy raw material (1) upper surface has solidified, close melting power supply (11), wherein 0 <
v0≤1.2mm/s；
S3, melting kettle (2) are taken out after quartz glass tube (5) are cooling, demoulding obtains the alloy pig of directional solidification.
9. directional solidification method of smelting according to claim 8, it is characterised in that: in the step S1, it is described will be quartzy
Vacuumize in glass tube (5) and be filled with protective gas specifically includes the following steps:
Quartz glass tube (5) is evacuated to pressure and reaches -0.099MPa hereinafter, opening protection by S1-1, opening vacuum pump (12)
Gas source (9) is passed through protective gas into quartz glass tube (5), closes the valve between vacuum pump (12) and quartz glass tube (5)
Door, opens the valve between vacuum pump (12) and quartz glass tube (5) close to after external atmosphere pressure after quartz glass tube (5) air pressure
Door takes out quartz glass tube (5) air pressure and reaches -0.099MPa；
S1-2, repeatedly step S1-1 2 times or more；
S1-3, continue to be passed through protective gas into quartz glass tube (5) with preset flow, while vacuum pump (12) is to quartz glass
Pipe (5) vacuumizes, i.e., holding quartz glass tube (5) interior pressure is constant and protective gas is flowing.
10. directional solidification method of smelting according to claim 8, it is characterised in that: in the step S1, the pretreatment
Specifically includes the following steps: alloy raw material (1) progress electric arc melting is obtained the alloy pig of complete alloying, then by alloying
Alloy pig is processed into pre-set dimension, obtains pretreated alloy raw material (1).
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