CN109014139A - The device and method that electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot - Google Patents
The device and method that electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot Download PDFInfo
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- CN109014139A CN109014139A CN201810996869.4A CN201810996869A CN109014139A CN 109014139 A CN109014139 A CN 109014139A CN 201810996869 A CN201810996869 A CN 201810996869A CN 109014139 A CN109014139 A CN 109014139A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
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- B22D23/10—Electroslag casting
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Abstract
The invention discloses the devices that a kind of electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot, including electroslag refining furnace, interior crystallizer, outer crystallizer and power supply system, and annular casting cavity is formed between the interior crystallizer and outer crystallizer；Consutrode heating fusing, crystallisation by cooling form titaniferous high temperature alloy part after casting slag in the annular casting cavity；The slag includes the component of following mass percent: CaF2: 59 ± 5%, CaO:18 ± 2%, Al2O3: 18 ± 2%, TiO2: 5 ± 3%；Or CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%.Electroslag remelting of the invention prepares the device containing titanium alloy, and abandoning stripping link (can be using without SiO2Slag system), solve because of [Ti]+(SiO2)=(TiO2)+[Si] and the technical issues of cause a large amount of scaling loss of titanium elements, under conditions of guaranteeing hollow steel ingot surface quality, so that oxidizable constituent content reaches alloy standard requirements, and be axially evenly distributed along ingot casting.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, it is related to a kind of electroslag remelting and prepares titaniferous high temperature alloy hollow steel ingot
Device, and the method for preparing titaniferous high temperature alloy hollow steel ingot.
Background technique
With the high speed development of China's aero-engine, gas turbine and petrochemical industry, to all kinds of alloy pipes
Performance requirement is higher and higher, and main includes elevated temperature strength, anti-oxidant, the corrosion-resistant and creep resistant fracture property etc. of material.With Austria
Family name's body heat resisting steel is that the traditional material of representative has been unable to satisfy the further development of above-mentioned industry, and high temperature alloy has well because of it
Creep strength and corrosion resistance, be the ideal material for preparing above-mentioned field tubing.High temperature alloy refers at 600 DEG C or more
With good anti-oxidant, corrosion resistance, be able to bear a kind of metal material of complex stress, the overwhelming majority containing titanium,
The oxidizable element such as aluminium.
The traditional preparation methods of alloy pipe are to be heated to malleable temperature using solid steel ingot as raw material and carry out jumping-up and punching
Hole is made through the processes such as reaming and pulling, since the thermoplasticity of high temperature alloy is poor, easily cracked in forging process or
Cracking.High temperature alloy pipe is prepared using conventional method, complex procedures, finished product recovery rate is low, particularly with large-scale compo pipe
Base, processing technology is increasingly complex, seriously reduces product lumber recovery and quality.Chinese invention patent (publication number:
CN106801146A a kind of method that high temperature alloy hollow steel ingot is prepared with stripping formula electroslag remelting) is disclosed, electroslag remelting
SiO must be incorporated in slag system2To guarantee that slag has good physical and chemical performance (high-temp plastic), to meet the pumping in smelting process
Ingot requirement.But in smelting titaniferous high temperature alloy (w [Ti] > 1%), according to reaction [Ti]+(SiO2)=(TiO2)+[Si] can
Know, SiO in slag2It can cause a large amount of scaling loss of titanium elements in steel ingot, so that oxidizable constituent content is not up in whole branch hollow steel ingot
Standard is required to alloy, this method has limitation.Chinese invention patent (publication number: CN102463272A) disclose it is a kind of from
Heart casting prepares the technology of hollow steel ingot, but there are internal defect, segregation, stomata, folders for the hollow steel ingot prepared of this method
The defects of miscellaneous, the internal soundness and performance of high temperature alloy pipe are seriously reduced, the method has limitation.
It uses hollow steel ingot to produce high temperature alloy pipe for raw material to be with a wide range of applications, but electroslag remelting produces
Alloying component and Ingot Surface Quality control are always the bottleneck of the preparation process in high temperature alloy hollow steel ingot.
Summary of the invention
The technical problem to be solved in the present invention is to provide the dresses that a kind of electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot
It sets, abandoning stripping link (can be using without SiO2Slag system), solve because of [Ti]+(SiO2)=(TiO2)+[Si] and cause
The technical issues of a large amount of scaling loss of titanium elements, under conditions of guaranteeing hollow steel ingot surface quality, so that oxidizable constituent content
Reach alloy standard requirements, and is axially evenly distributed along ingot casting.
In order to solve the above-mentioned technical problems, the present invention provides a kind of electroslag remeltings to prepare titaniferous high temperature alloy hollow steel ingot
Device, including electroslag refining furnace and power supply system, further include the interior crystallizer being installed in the electroslag refining furnace and
Outer crystallizer forms annular casting cavity, is equipped with ring in the annular casting cavity between the interior crystallizer and outer crystallizer
Shape consutrode group；In the annular casting cavity after casting slag, annular consutrode group carries out electricity in annular casting cavity
Slag refusion and smelting forms titaniferous high temperature alloy hollow steel ingot；
The interior crystallizer include head and the tail be in turn connected to form the first seperated of hollow cylinder shape structure, second it is seperated and
Third is seperated, and described second is seperated and third fission is rotatably connected on the first seperated both ends respectively, and described second is seperated and the
The free end of triad snaps connection；
The slag includes the component of following mass percent:
CaF2: 59 ± 5%, CaO:18 ± 2%, Al2O3: 18 ± 2%, TiO2: 5 ± 3%；
Or CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%.
It further comprise the power supply system include power supply, reactor, first switch in a preferred embodiment of the present invention
(K1) and second switch (K2)；One end of the power supply connects consutrode group, and both described first switch and the second switches are simultaneously
The other end of power supply is connected to after connection, the other end of the first switch is electrically connected electroslag refining furnace bottom water case, and described second opens
Outer crystallizer is electrically connected after the other end current-limiting reactor of pass；
Power supply, consutrode group, molten slag, hollow steel ingot, electroslag refining furnace bottom water case, first switch are sequentially connected electrically
Form the first current supply circuit；
Power supply, consutrode group, molten slag, outer crystallizer, reactor, second switch are sequentially connected electrically to form the second confession
Electrical circuit；
The electroslag remelting in-furnace slag heats up the first current supply circuit of primary starting, starting simultaneously the after slag temperature is stablized
One current supply circuit and the second current supply circuit.
It further comprise that the impedance of the reactor can adjust, by adjusting electricity in a preferred embodiment of the present invention
The impedance of anti-device adjusts the size of current of the second current supply circuit.
In a preferred embodiment of the present invention, further comprise first current supply circuit melting voltage be 50~80V,
Melting electric current is 0.025~0.04 (D2-d2)；The melting voltage of second current supply circuit is 50~80V, and melting electric current is
0.01~0.016 (D2-d2)；Wherein, D is the internal diameter of outer crystallizer, and d is the outer diameter of interior crystallizer.
It further comprise that the second seperated free end face of the interior crystallizer is equipped in a preferred embodiment of the present invention
First card slot；The free end face of the third fission is equipped with the second card slot, and second fission and third fission are set between the two
There is inserted block, constitutes crystallizer in the annular of closure when between second fission of inserted block insertion and third fission.
It further comprise the first card slot top end opening in a preferred embodiment of the present invention, low side is blind mouth；Institute
The second card slot top end opening is stated, low side is blind mouth.
In a preferred embodiment of the present invention, further comprise the consutrode group be two groups, two consutrodes
Group is symmetrical arranged in the two sides of interior crystallizer；The melting rate of the consutrode group is 0.5~0.8 (D2-d2)0.5kg/h；Its
In, D is the internal diameter of outer crystallizer, and d is the outer diameter of interior crystallizer.
In order to solve the above-mentioned technical problem, the present invention also provides a kind of electroslag remeltings to prepare titaniferous high temperature alloy hollow steel
The method of ingot, includes the following steps,
(1) fixed interior crystallizer, outer crystallizer are on electroslag refining furnace；Consutrode group is installed on support arm and insertion ring
In shape casting cavity and it is symmetrical arranged in the two sides of interior crystallizer；
(2) it matches slag charge: matching following component C aF by mass percentage2: 59 ± 5%, CaO:18 ± 2%, Al2O3:18
± 2%, TiO2: 5 ± 3%；
Or CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%；
(3) it obtains molten slag: slugging in slugging furnace is added in each component of step (2) and obtains molten slag；
(4) molten slag is poured into annular casting cavity, starting power supply system starts electric slag refusion and smelting.
It further comprise the power supply system include power supply, consutrode group, reactance in a preferred embodiment of the present invention
Device, first switch (K1) and second switch (K2)；In the consutrode group insertion annular casting cavity；One end of the power supply
Consutrode group is connected, the other end of power supply is connected to after both described first switch and the second switches are in parallel, described first opens
The other end of pass is electrically connected electroslag refining furnace bottom water case, and outer crystallization is electrically connected after the other end current-limiting reactor of the second switch
Device；
Power supply, consutrode group, molten slag, hollow steel ingot, electroslag refining furnace bottom water case, first switch be successively electrically connected
It connects to form the first current supply circuit；
Power supply, consutrode group, molten slag, outer crystallizer, reactor, second switch are sequentially connected electrically to form the second confession
Electrical circuit；
First current supply circuit starting 10~after twenty minutes, start the second current supply circuit.
The present invention compared to the prior art the advantages of and technical effect it is as follows:
One, electroslag remelting of the invention prepare the device containing titanium alloy, and abandoning stripping link (can use and be free of
SiO2Slag system), solve because of [Ti]+(SiO2)=(TiO2)+[Si] and the technical issues of cause a large amount of scaling loss of titanium elements,
Under conditions of guaranteeing hollow steel ingot surface quality, so that oxidizable constituent content reaches alloy standard requirements, and along ingot casting axial direction
It is evenly distributed.
Secondly, for the high temperature of w [Ti]/w [Al] < 5 (mass fraction that w [Ti] is the mass fraction of Ti, w [Al] is Al)
Alloy, using CaF2: 59 ± 5%, CaO:18 ± 2%, Al2O3: 18 ± 2%, TiO2: 5 ± 3% slag systems, with good object
Change performance and be conducive to desulfurization, a small amount of TiO is added in slag2It is to ensure that 3 [Ti]+2 (Al2O3(the TiO of)=32)+4 [Al] connect
Near-thermal mechanical balance.For w [Ti]/w [Al] > 5 high temperature alloy, a large amount of TiO is added in slag2Promote 3 [Ti]+2 of reaction
(Al2O3(the TiO of)=32)+4 [Al] are close to thermodynamical equilibrium, excessively high TiO2It is easy to deteriorate slag physical and chemical performance, leads to steel ingot table
Planar defect occurs.Due to CaO and acidic oxide TiO2CaTiO can be combined into3, seriously reduce TiO2Activity, for high w
For [Ti]/w [Al] is than alloy, low CaO slag can reduce TiO in slag2Dosage.Therefore, for w [Ti]/w [Al] > 5 height
Temperature alloy, using the slag system CaF of low CaO2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2:8
± 3%, can not only guarantee the high w [Ti] in alloy/w [Al] than, slag has both good physical and chemical performance simultaneously, guarantee steel ingot
Surface quality.
Thirdly, using inside and outside fourplatemold, can be with the stripping link of abandoning tradition stripping formula electroslag remelting, using not
Containing without SiO2Slag system, reduce because of [Ti]+(SiO2)=(TiO2)+[Si]、4[Al]+3(SiO2(the Al of)=22O3)+3 [Si] draw
A large amount of scaling loss of titanium, aluminium are played, guarantee that titanium, aluminium content reach target component.
Four, interiors of products quality and surface quality are improved.In electroslag remelting high temperature alloy hollow steel ingot, in inside and outside knot
Brilliant device it is strong it is cold under, the segregation of ingot casting decreases, while can significantly reduce the core segregation problems of solid ingot；In addition, electric
The hollow steel ingot of slag remelting has many advantages, such as that dense structure, degree of purity are high.Using the electroslag weight of fourplatemold of the invention
Smelting furnace has more smooth inside and outside surface quality compared to the high temperature alloy hollow steel ingot of stripping formula electroslag refining furnace preparation.
Five, the high temperature alloy hollow steel ingot containing oxidizable element can be smelted.Using Chinese invention patent (publication number:
CN106801146A) the stripping formula electroslag remelting hollow steel ingot technology proposed must be incorporated 2% SiO in slag2, cause titanium
A large amount of scaling loss of element are not suitable for smelting titaniferous high temperature alloy.Using preparation facilities of the invention, stripping link is reduced, it can
Using without SiO2Slag system can be used to high temperature alloy of the electroslag remelting containing oxidizable element so as to avoid this problem
Hollow steel ingot.
Six, electroslag remelting of the invention prepares the method containing titanium alloy, can mention for the preparation of titaniferous high temperature alloy pipe
For hollow steel ingot raw material, it is directly used in the forging technologies such as reaming and pulling.Forging times can be not only reduced, improves to forge and receive
Rate, additionally it is possible to improve the as-cast structure of hollow ingot, obtain that surface quality is excellent, the uniform high temperature alloy pipe of chemical component.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that titaniferous high temperature alloy hollow steel ingot device is prepared in the preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of crystallizer in the present invention.
Wherein: 1- hollow steel ingot, 3- insulation board；
2- electroslag refining furnace bottom water case, crystallizer in 4-, the outer crystallizer of 6-, 8- annular are poured cavity, 10- consutrode
Group, 12- power supply, 14- reactor, 16- first is seperated, and 18- second is seperated, and 20- third is seperated, the first card slot of 22-, 24- second
Card slot, 30- inserted block, 34- liquid slag bath, 36- hollow hole.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment one
As shown in Figs. 1-2, present embodiment discloses the device that a kind of electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot,
Including electroslag refining furnace 2, interior crystallizer 4, outer crystallizer 6 and power supply system.Above-mentioned interior crystallizer 4, outer crystallizer 6 are installed in
On electroslag refining furnace 2, the hollow steel ingot (titaniferous high temperature alloy part) of corresponding preparation open circles tubular structure, above-mentioned interior crystallizer 4
Be both preferably hollow cylindrical body structure with outer crystallizer 6, interior crystallizer 4 and outer crystallizer 6 it is coaxial it is inside and outside be arranged, between the two
Form annular casting cavity 8；In above-mentioned annular casting cavity 8, electricity is carried out in this ring-shaped chamber using annular consutrode group
Slag refusion and smelting is cooled into titaniferous high temperature alloy part (hollow steel ingot).Using inside and outside fourplatemold, biography can be abandoned
The stripping link of system stripping formula electroslag remelting, using without SiO2Slag system, reduce because of [Ti]+(SiO2)=(TiO2)+[Si]、4
[Al]+3(SiO2(the Al of)=22O3)+3 [Si] cause a large amount of scaling loss of titanium, aluminium, guarantee that titanium, aluminium content reach target component.
Specifically, above-mentioned power supply system includes power supply 12, consutrode group 10, reactor 14, first switch K1 and second
Switch K2.Above-mentioned consutrode group 10 is it is preferable to use two groups, in insertion annular casting cavity 8, and two consutrode groups 10
It is symmetrical arranged in interior 4 two sides of crystallizer；The melting rate of above-mentioned consutrode group is 0.5~0.8 (D2-d2)0.5Kg/h, every certainly
Diameter of phi=0.5~0.7 (the D of power pole2-d2)0.5/L0.5, each consutrode group 10 has four consutrodes；Wherein, D
For the internal diameter of outer crystallizer 6, d is the outer diameter of interior crystallizer 4, and L is total number of consutrode, in the present embodiment technical solution, D
Preferably 500~1500mm, d are preferably 300~700mm, and L is preferably 6~10.
Electric connection of power supply 12 after two groups of 10 parallel connections of consutrode group, both above-mentioned first switch K1 and second switch K2 are in parallel
The other end of the other end of electric connection of power supply 12 afterwards, above-mentioned first switch K1 is electrically connected 2 furnace bottom of electroslag refining furnace, and above-mentioned second opens
Outer crystallizer 6 is electrically connected after closing the other end current-limiting reactor 14 of K2.
The above power supply system constitutes single supply double circuit power supply mode, is respectively as follows:
Power supply 12, consutrode group 10, molten slag 34, hollow steel ingot 1, electroslag refining furnace bottom water case 2, first switch K1
It is sequentially connected electrically to form the first current supply circuit；After first switch K1 closure, power supply 12 is heated through the first current supply circuit electroslag remelting
Slag system, consumable electrode.The melting voltage of above-mentioned first current supply circuit is 50~80V, and melting electric current is 0.025~0.04 (D2-
d2)。
Power supply 12, consutrode group 10, molten slag 34, outer crystallizer 6, reactor 14, second switch K2 are successively electrically connected
It connects to form the second current supply circuit；After second switch K2 closure, power supply 12 is through the second current supply circuit electroslag remelting heating slag, fusing
Electrode.The melting voltage of above-mentioned second current supply circuit is 50~80V, and melting electric current is 0.01~0.016 (D2-d2)；Wherein, D is
The internal diameter of outer crystallizer, d are the outer diameter of interior crystallizer.
Above-mentioned electroslag remelting in-furnace slag heats up the first current supply circuit of primary starting, starting simultaneously the after slag temperature is stablized
One current supply circuit and the second current supply circuit.
The above power supply system is constituted in single supply double circuit power supply circuit, is powered by adjusting the first current supply circuit and second
The circulation size of electric current changes the high temperature zone position of slag bath in electroslag refining furnace in circuit, is allowed to be partial to consutrode and outer
In slag bath between crystallizer 6, the heat transfer of the inside crystallizer 4 of slag bath is reduced, is so guaranteeing consutrode with certain fusing speed
The heat transfer load that interior crystallizer 4 is reduced under the premise of degree can prepare inside and outside surface quality after selecting suitable technological parameter
Excellent, the uniform high temperature alloy hollow steel ingot of alloying component.
Specifically, adjusting loop current in the following manner, the impedance of above-mentioned reactor 14 can be adjusted, by adjusting
The impedance of reactor 14 adjusts the size of current of the second current supply circuit.
When in need alloy to be prepared, it is desirable that (w [Ti] is the mass fraction of Ti to w [Ti]/w [Al] < 5, w [Al] is Al's
Mass fraction) when, slag includes the component of following mass percent: CaF2: 59 ± 5%, CaO:18 ± 2%, Al2O3:18±
2%, TiO2: 5 ± 3%.It is with good physical and chemical performance and is conducive to desulfurization, and a small amount of TiO is added in slag2It is to ensure that 3
[Ti]+2(Al2O3(the TiO of)=32)+4 [Al] are close to thermodynamical equilibrium.
When in need alloy to be prepared, it is desirable that (w [Ti] is the mass fraction of Ti to w [Ti]/w [Al] > 5, w [Al] is Al's
Mass fraction) when, slag includes the component of following mass percent: CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3:15±
3%, MgO:7 ± 2%, TiO2: 8 ± 3%.A large amount of TiO is added in slag2Promote 3 [Ti]+2 (Al of reaction2O3(the TiO of)=32)+4
[Al] is close to thermodynamical equilibrium, excessively high TiO2It is easy to deteriorate slag physical and chemical performance, leads to ingot surface defect.Due to
CaO and acidic oxide TiO2CaTiO can be combined into3, seriously reduce TiO2Activity, for high w [Ti]/w [Al] than alloy and
Speech, low CaO slag can reduce TiO in slag2Dosage.Therefore, for w [Ti]/w [Al] > 5 high temperature alloy, using low CaO's
Slag system CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%, it can not only guarantee
High w [Ti]/w [Al] in alloy than, slag has both good physical and chemical performance simultaneously, guarantee Ingot Surface Quality.
As a further improvement of the present invention, above-mentioned interior crystallizer 4 includes that head and the tail are in turn connected to form hollow cylinder shape
The first fission of fission 16, second 18 and third fission 20 of structure, above-mentioned second fission 18 and third fission 20 company of rotation respectively
It connects at the both ends of the first fission 16, the free end of above-mentioned second fission 18 and third fission 20 snaps connection.Hollow steel ingot is in height
When temperature is cooling, temperature declines so that hollow steel ingot is in contracted state, and inner hole reduces, and inside crystallizer 4 squeezes, the present embodiment technical side
In case, crystallizer 4 is assembled by three fissions in design, can mutually adjust in High-temperature cooling, in hollow steel ingot
When crystallizer demoulds, interior crystallizer can smoothly be taken out from hollow steel ingot inner hole by the buckle of crystallizer in removing, disappeared
" interior crystallizer locking " phenomenon caused by except being shunk because of hollow steel ingot.
Specifically, as shown in Fig. 2, the free end face of above-mentioned second fission 18 is equipped with the first card slot 22；Above-mentioned third is seperated
20 free end face is equipped with the second card slot 24, and above-mentioned second fission 18 and third fission 20 are equipped with inserted block 30 between the two, above-mentioned
Inserted block 30 is inserted into the first card slot 22 and the second card slot 24.Before assembling and when demoulding, by inserted block 30 from the second fission 18 and third
It releases in fission 20, the second fission 18 of interior crystallizer and third fission 20 are rotatably connected on the first fission 16 at this time,
The state that can generally shrink inwardly.In use, by between second fission 18 of the insertion of inserted block 30 and third fission 20, at this time
Inserted block 30 is caught in the first card slot 22 and in the second card slot 24, and stuck, three fissions are both slided in respective card slot
It is assembled into crystallizer 4 in the circular ring shape of boring.
In order to clamp limit, above-mentioned first card slot, 22 top end opening, low side is blind mouth；It opens on above-mentioned second card slot, 24 top
Mouthful, low side is blind mouth.
Embodiment two
Present embodiment discloses a kind of methods that electroslag remelting prepares titaniferous high temperature alloy, use the device of embodiment one kind
Preparation GH738 is carried out, the chemical component of consutrode is as shown in table 1,
The chemical component of 1 high temperature alloy GH738 consutrode of table
| The trade mark | C | Cr | Co | Mo | Al | Ti | Ni |
| GH738 | 0.05 | 19.2 | 13.5 | 4.2 | 1.4 | 3.1 | Bal |
Itself the following steps are included:
(1) prepare GH738 high temperature alloy consutrode group, left electrodes group is 4, right electrodes group is 4；
(2) slag: CaF is matched using following mass percent2: 59%, CaO:18%, Al2O3: 18%, TiO2: 5%
Slag system is placed in slugging furnace, insertion graphite electrode carry out slugging, after by high-temperature liquid state slag pour into annular casting cavity, insert
Enter consutrode group, constitutes power supply → consutrode → liquid slag bath → hollow steel ingot → electroslag refining furnace bottom water case → switch K1
First current supply circuit of → transformer；
(3) it is powered after 10 minutes stabilizations, is connected to the second current supply circuit, the first current supply circuit and the second current supply circuit carry out double
Loop power supply, sets suitable electric current and voltage carries out electroslag remelting, until smelting terminates.
Inside and outside crystallizer size and specific technological parameter are as follows: outer crystallizer internal diameter is Φ 900mm, interior crystallizer
Outer diameter is Φ 300mm, and every consutrode diameter is Φ 150mm, totally 8 (every group 4)；Slag bath height is 150mm, this implementation
Example slag dosage is 220kg；The voltage of the first current supply circuit of electroslag furnace is 68~72V, the electric current of the first current supply circuit is 25~
28KA；Second current supply circuit by adjust reactor by current control within the scope of 9~11KA；Melting rate be 600~
650kg/h。
The GH738 high temperature alloy hollow steel ingot prepared using fourplatemold, single supply double loop electroslag remelting, it is inside and outside
Surface quality is good, smooth.To the head of hollow ingot, in, tail carry out constituent analysis, as shown in table 2, ingredient is in claimed range
It is interior, reach qualified, and be axially evenly distributed along hollow ingot.
Al, Ti of 2 embodiment of table, 2 high temperature alloy hollow steel ingot are distributed
| Hollow ingot position | Bottom | Middle part | Top |
| Al | 1.3 | 1.4 | 1.3 |
| Ti | 2.9 | 2.9 | 3.0 |
Embodiment three
The device that titaniferous high temperature alloy hollow ingot is prepared using the electroslag remelting of above-described embodiment one, takes following methods system
Standby Inconel 740, the chemical component of consutrode are as shown in table 3.
The chemical component of 3 high temperature alloy Inconel of table, 740 consutrode
| The trade mark | C | Cr | Co | Nb | Si | Al | Ti | Ni |
| Inconel740 | 0.03 | 25 | 20 | 2 | 0.5 | 0.9 | 1.8 | Bal |
Itself specifically includes the following steps:
(1) prepare 740 high temperature alloy consutrode group of Inconel, left electrodes group is 4, right electrodes group is 4；
(2) slag: CaF is matched using following mass percent2: 59%, CaO:18%, Al2O3: 18%, TiO2: 5%
Slag system is placed in slugging furnace, and insertion graphite electrode carries out slugging, after high-temperature liquid state slag is poured between inside and outside crystallizer
Cavity in, be inserted into consutrode group, constitute the first current supply circuit；
(3) be powered after 10 minutes stabilization, the first current supply circuit of connection, using the first current supply circuit and the second current supply circuit into
Row double circuit power supply, sets suitable electric current and voltage carries out electroslag remelting, until smelting terminates.
Crystallizer size and specific technological parameter are as follows: outer crystallizer internal diameter is Φ 1200mm, the outer diameter of interior crystallizer
For Φ 400mm, every consutrode diameter is Φ 200mm, totally 8 (every group 4)；Slag bath height is 150mm, the present embodiment slag
Dosage is 400kg；The voltage of electroslag furnace galvanic circle I is 75~80V, and the electric current of current supply circuit I is 34~38KA；Current supply circuit
II by adjust reactor by current control within the scope of 13~16KA；Melting rate is 850~900kg/h.
The 740 high temperature alloy hollow steel of Inconel prepared using fourplatemold, single supply double loop electroslag remelting
Ingot, inside and outside surface quality are good, smooth.To the head of hollow ingot, in, tail carry out constituent analysis, as shown in table 4, ingredient exists
In claimed range, reach qualified, and is axially evenly distributed along hollow ingot.
Al, Ti of 4 embodiment of table, 3 high temperature alloy hollow steel ingot are distributed
| Hollow ingot position | Bottom | Middle part | Top |
| Al | 0.8 | 0.8 | 0.8 |
| Ti | 1.7 | 1.8 | 1.7 |
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (9)
1. a kind of electroslag remelting prepares the device of titaniferous high temperature alloy hollow steel ingot, including electroslag refining furnace and power supply system,
Be characterized in that: it further includes the interior crystallizer and outer crystallizer being installed on the electroslag refining furnace, the interior crystallizer and
Annular casting cavity is formed between outer crystallizer, is equipped with annular consutrode group in the annular casting cavity；The annular is poured
It infuses in cavity after casting slag, annular consutrode group carries out electric slag refusion and smelting in annular casting cavity, and it is high to form titaniferous
Temperature alloy hollow steel ingot；
The interior crystallizer includes first seperated, the second seperated and third that head and the tail are in turn connected to form hollow cylinder shape structure
Fission, the described second seperated both ends for being rotatably connected on the first fission respectively with third fission, the described second seperated and third point
The free end of body snaps connection；
The slag includes the component of following mass percent:
CaF2: 59 ± 5%, CaO:18 ± 2%, Al2O3: 18 ± 2%, TiO2: 5 ± 3%；
Or CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%.
2. the device that electroslag remelting as described in claim 1 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
Power supply system includes power supply, reactor, first switch (K1) and second switch (K2)；One end of the power supply connects consutrode
Group is connected to the other end of power supply, the other end electricity of the first switch after both described first switch and the second switches are in parallel
Electroslag refining furnace bottom water case is connected, the outer crystallizer of electrical connection after the other end current-limiting reactor of the second switch；
Power supply, consutrode group, molten slag, hollow steel ingot, electroslag refining furnace bottom water case, first switch are sequentially connected electrically to be formed
First current supply circuit；
Power supply, consutrode group, molten slag, outer crystallizer, reactor, second switch are sequentially connected electrically to form the second power supply time
Road；
Electroslag remelting in-furnace slag heating first current supply circuit of primary starting, starting first simultaneously supplies after slag temperature is stablized
Electrical circuit and the second current supply circuit.
3. the device that electroslag remelting as claimed in claim 2 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
The impedance of reactor can adjust, and the size of current of the second current supply circuit is adjusted by adjusting the impedance of reactor.
4. the device that electroslag remelting as claimed in claim 2 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
The melting voltage of first current supply circuit is 50~80V, and melting electric current is 0.025~0.04 (D2-d2)；Second current supply circuit
Melting voltage be 50~80V, melting electric current be 0.01~0.016 (D2-d2)；Wherein, D is the internal diameter of outer crystallizer, and d is interior
The outer diameter of crystallizer.
5. the device that electroslag remelting as described in claim 1 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
The seperated free end face of the second of interior crystallizer is equipped with the first card slot；The free end face of the third fission is equipped with the second card slot,
Second fission and third fission are equipped with inserted block, structure when between second fission of inserted block insertion and third fission between the two
At crystallizer in the annular of closure.
6. the device that electroslag remelting as claimed in claim 5 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
First card slot top end opening, low side are blind mouth；The second card slot top end opening, low side are blind mouth.
7. the device that electroslag remelting as described in claim 1 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
Consutrode group is two groups, and the two consutrode groups are symmetrical arranged in the two sides of interior crystallizer；The consutrode group melts
Change rate is 0.5~0.8 (D2-d2)0.5kg/h；Wherein, D is the internal diameter of outer crystallizer, and d is the outer diameter of interior crystallizer.
8. a kind of method that electroslag remelting prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: include the following steps,
(1) fixed interior crystallizer, outer crystallizer are on electroslag refining furnace；Installation consutrode group is on support arm and being inserted into annular and pour
In note cavity and it is symmetrical arranged in the two sides of interior crystallizer；
(2) it matches slag charge: matching following component C aF by mass percentage2: 59 ± 5%, CaO:18 ± 2%, Al2O3:18±
2%, TiO2: 5 ± 3%；
Or CaF2: 62 ± 5%, CaO:8 ± 2%, Al2O3: 15 ± 3%, MgO:7 ± 2%, TiO2: 8 ± 3%；
(3) it obtains molten slag: slugging in slugging furnace is added in each component of step (2) and obtains molten slag；
(4) molten slag is poured into annular casting cavity, starting power supply system starts electric slag refusion and smelting.
9. the method that electroslag remelting as claimed in claim 8 prepares titaniferous high temperature alloy hollow steel ingot, it is characterised in that: described
Power supply system includes power supply, consutrode group, reactor, first switch (K1) and second switch (K2)；The consutrode group
In insertion annular casting cavity；One end of the power supply connects consutrode group, and both described first switch and the second switches are simultaneously
The other end of power supply is connected to after connection, the other end of the first switch is electrically connected electroslag refining furnace bottom water case, and described second opens
Outer crystallizer is electrically connected after the other end current-limiting reactor of pass；
Power supply, consutrode group, molten slag, hollow steel ingot, electroslag refining furnace bottom water case, first switch are sequentially connected electrically to be formed
First current supply circuit；
Power supply, consutrode group, molten slag, outer crystallizer, reactor, second switch are sequentially connected electrically to form the second power supply time
Road；
First current supply circuit starting 10~after twenty minutes, start the second current supply circuit.
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| CN111705219A (en) * | 2020-06-30 | 2020-09-25 | 重庆钢铁研究所有限公司 | Slag system for electroslag remelting high-titanium high-silicon stainless steel and preparation method thereof |
| CN113652564A (en) * | 2021-10-19 | 2021-11-16 | 北京科技大学 | Method for smelting high-temperature alloy by using return material |
| CN116713419A (en) * | 2023-06-26 | 2023-09-08 | 重庆新承航锐科技股份有限公司 | Thermal processing method and system for improving mechanical properties of 13Cr10Mo1W1VNbN gas turbine wheel disc forging |
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Application publication date: 20181218 |