CN109631568A - A kind of pressure sintering furnace and sintering method of magnetic field coupling DC current - Google Patents
A kind of pressure sintering furnace and sintering method of magnetic field coupling DC current Download PDFInfo
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- CN109631568A CN109631568A CN201910094485.8A CN201910094485A CN109631568A CN 109631568 A CN109631568 A CN 109631568A CN 201910094485 A CN201910094485 A CN 201910094485A CN 109631568 A CN109631568 A CN 109631568A
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- magnetic field
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- furnace
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Classifications
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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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/16—Arrangements of air or gas supply 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
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/18—Arrangement of controlling, monitoring, alarm or like devices
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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
- F27M2003/04—Sintering
Abstract
The present invention relates to the pressure sintering furnaces and sintering method of a kind of magnetic field coupling DC current comprising: furnace body, magnetic field control system, control pressurer system, DC current generator and overall control center；Furnace body includes upper bell, lower bell and furnace body, is provided with mold in furnace body；Magnetic field control system includes magnetic field generator and magnetic field control unit, and magnetic field generator is arranged in furnace body, applies magnetic field to the material to be sintered in mold, magnetic field control unit is connected with overall control center；Control pressurer system includes pressure generating unit and pressure control portion, and pressure generating unit is arranged in furnace body, pressurizes for fixing mould and to the material to be sintered in mold；Pressure control portion is connected with overall control center, controls the pressure of pressure generating unit；DC current generator is connected with the pressure generating unit and overall control center of control pressurer system respectively, applies DC current to mold or material to be sintered.Present invention can apply in the sintering process of various high-performance advanced materials.
Description
Technical field
The present invention relates to a kind of sintering furnace and sintering methods, burn especially with regard to a kind of pressure of magnetic field coupling DC current
Freezing of a furnace and sintering method.
Background technique
One of the step of sintering is most critical in a variety of advanced material preparation process such as high-performance ceramic, hard alloy.With
For ceramic material, material transport occurs during the sintering process for raw material biscuit or powder, and green body is received after reaching a certain temperature
Contracting, crystal grain grows up, and excludes with stomata, finally lower than fusing point at a temperature of become fine and close ceramic material.Silicon nitride, carbon
The fusing point of the ceramics such as SiClx, aluminium oxide, zirconium oxide is very high, compared to other low melting points ceramics, needs to carry out at higher temperatures
Sintering is just able to achieve densification, to propose very high request to corresponding agglomerating plant.
According to the difference of specific sintering process parameter, a variety of sintering technologies are had been developed that at present, such as normal pressure-sintered, air pressure
Sintering, hot pressed sintering, discharge plasma sintering (i.e. SPS) etc..Normal pressure-sintered finger material is burnt in atmospheric pressure environments
Knot, product consistency be not high.Gas pressure sintering refers to that material is sintered in specific protective atmosphere environment, and gas pressure is usually big
In atmospheric pressure, it is suitble to large-scale industrial production, but product consistency is still not ideal enough.Sintering process of the hot pressed sintering in material
In external pressure is applied by pressure head to improve sintering driving force can reach densification within a short period of time, help to obtain
The microstructure of uniform small grains.Three of the above sintering technology relies primarily on the fever of heater (such as Si-Mo rod, graphite),
Sample is heated by three kinds of convection current, conduction and radiation heat exchange patterns, thus it is very big to be sintered power consumption, and heating efficiency is very
It is low.The discharge plasma sintering (SPS) of rising in recent years refers to during the sintering process without using external heat source, but utilizes and pass through
The pulse current of sample or conductive die keeps its own heating up, while the plasma and activating effect that are generated using it are promoted
Sintering.But it is easy to cause temperature field in sample uneven using Current Heating, large scale sample can not be sintered；And arteries and veins
Rushing current flow devices, structure is complicated, at high cost, is not suitable for industrial applications.If can directly be applied in the sintering process of no heater
Add stable DC stream, discharge spark is persistently provided, then can obtain sintering efficiency and sintering quality higher than SPS, and sample
Interior uniform temperature fields, sinterable large scale sample.In addition, when the ceramic material with magnetic anisotropy is in magnetic field, it is brilliant
Grain is had the tendency that rotating by magneticaction, this trend makes its easy magnetizing axis tend to the arrangement of parallel magnetic field direction, from
And obtain the sintered body with texture.At present both at home and abroad still without be directed to can during the sintering process the agglomerating plant of coupled magnetic field or
Method occurs.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide one kind to be sintered under magnetic field environment to material, have
Effect ground discharge stomata, improves the densification degree of material, refines crystal grain, and promote the formation of material texture, while can be by applying
Stable DC stream is added to improve sintering efficiency and quality, to prepare the magnetic field coupling DC current of high-performance advanced material
Pressure sintering furnace and sintering method.
To achieve the above object, the present invention takes following technical scheme: a kind of pressure sintering of magnetic field coupling DC current
Furnace comprising: furnace body, magnetic field control system, control pressurer system, DC current generator and overall control center；The furnace body packet
Bolted upper bell, lower bell and furnace body are included, is provided in the furnace body for clamping material to be sintered
Mold；The magnetic field control system includes magnetic field generator and magnetic field control unit interconnected, the magnetic field generator setting
In the furnace body, for applying magnetic field to the material to be sintered in the mold, the magnetic field control unit and described total
Control center is connected, and the magnetic field for generating to the magnetic field generator controls；The control pressurer system includes mutual
The pressure generating unit and pressure control portion of connection, the pressure generating unit are arranged in the furnace body, described in fixed
Mold, and unidirectionally pressurizeed to the material to be sintered in the mold；The pressure control portion is connected with the overall control center
It connects, is controlled for the pressure to the pressure generating unit；The DC current generator is controlled with the pressure respectively
The pressure generating unit of system is connected with overall control center, for being applied through the DC current of the mold or material to be sintered.
Further, the magnetic field generator is the field generator for magnetic in hollow cylindrical, the field generator for magnetic
Abutting is arranged on the outside of the mold or the inboard wall of furnace body.
Further, the electromagnetic coil in the field generator for magnetic is superconducting coil or Conventional coil.
Further, the pressure generating unit includes seaming chuck and push-down head；The seaming chuck is fixed at the furnace
Body body interior, the seaming chuck upper end are fixed on the fixation device at top by being pierced by the middle part of the upper bell, it is described on
Pressure head lower end is inserted into the intracorporal mold upper end of the furnace, and is in contact with the material to be sintered clamped in the mold；It is described
Push-down head upper end extend into the intracorporal mold lower end of the furnace, and is in contact with the material to be sintered clamped in the mold, institute
State push-down head lower end by be pierced by the middle part of the furnace body bottom and lower bell afterwards with the pressure control that is arranged in outside furnace body
Portion's connection processed；The pressure control portion includes hydraulic cylinder and pressure control device；The output end of the hydraulic cylinder with it is described
Push-down head lower end is connected, and the input terminal of the hydraulic cylinder is connected with the pressure control device, the pressure control device
Input terminal is connect with the overall control center, according to the overall control center send pressure controling signal by the hydraulic cylinder to
The push-down head transmits pressure, treats agglomerated material and is unidirectionally pressurizeed.
Further, the output end of the DC current generator stretches out the upper bell and institute with the seaming chuck respectively
The part connection that push-down head stretches out the lower bell is stated, and the seaming chuck and push-down head and the DC current generator export
The junction periphery at end is surrounded with flexible insulating layer；The input terminal of the DC current generator is connect with the overall control center,
The mold is applied through by the seaming chuck and push-down head according to the DC current control signal that the overall control center is sent
Or the DC current of material to be sintered.
Further, the operating voltage of the DC current generator is 0~1000V, and output electric current is 0~5000A.
Further, the pressure sintering furnace of the magnetic field coupling DC current further includes atmosphere control system, the atmosphere
Control system is connected to by the air inlet/outlet being arranged in the furnace body with the furnace interior；The atmosphere control system with
The overall control center connection, the control climate signal sent according to the overall control center are realized by the air inlet/outlet to described
Furnace body vacuumizes or is passed through the operation of gas.
Further, the pressure sintering furnace of the magnetic field coupling DC current further includes cooling system, the cooling system
Connect with the water outlet that the water inlet of the furnace body bottom is arranged in and is arranged at the top of the furnace body, and it is described into
The mouth of a river and water outlet are connected with the water-cooling channel that the furnace body inner wall is arranged in；The input terminal of the cooling system with
The overall control center connection controls the flow velocity of cooling water according to the cooling water control signal that the overall control center is sent.
Further, the pressure sintering furnace of the magnetic field coupling DC current further includes infrared temperature measurement system, described infrared
Temp measuring system detects the temperature of the die surface by the infrared measurement of temperature window that the furnace body side is arranged, and will test
Temperature signal be sent to the overall control center, the overall control center is according to the temperature signal received to the temperature at the mold
Degree carries out real-time monitoring.
Another aspect of the present invention is to provide a kind of sintering method of the pressure sintering furnace of magnetic field coupling DC current,
Itself the following steps are included:
1) it checks and determines that each system of the pressure sintering furnace of magnetic field coupling DC current is working properly, open lower bell, it will
End cap places material to be sintered in mold in push-down head upper end under mold, closes lower bell, and by lower bell and furnace body
It is bolted；
2) atmosphere control system is controlled by overall control center to vacuumize furnace interior, then pass to as defined in sintering process
Protective gas；
3) sintering process parameter, including magnetic induction intensity and its action time, pressure size, liter are inputted by overall control center
Warm rate, rate of temperature fall and soaking time；
4) for overall control center according to the sintering process parameter of setting, control magnetic field control system, which applies, acts on material to be sintered
Magnetic field；Control DC current generator makes material warms to be sintered by seaming chuck and push-down head application DC current and keeps the temperature
Preset time；Control control pressurer system applies the unidirectional constant pressure for acting on material to be sintered by push-down head, so as to
Agglomerated material is sintered under the THM coupling effect of magnetic field, DC current and uniaxial pressure；
5) after the completion of to be sintered, control magnetic field control system, DC current generator stop working, pressure control device by
The gradually pressure of removal push-down head；The flow of cooling water, promotes furnace interior cooling in the furnace body of cooling system control simultaneously；
6) after furnace body temperature is reduced to room temperature, lower bell is opened, sintered body is taken out, is then shut off lower bell, close
Each system, sintering are completed.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention is due to can be in externally-applied magnetic field
Environment in treat agglomerated material and be sintered, the formation of ceramic material textured structure can be effectively facilitated, can also be promoted hard
The advanced material with unique microstructures and performance enhancement is prepared in the solution strengthening and dispersion-strengtherning of matter alloy etc..2, originally
Invention is sintered due to treating agglomerated material using DC current, can significantly improve sintering efficiency and quality, reduces sintering
The crystallite dimension of body can be used for the Fast Sintering of various high-compactness and high uniformity material.3, the present invention due to using for the first time
Magnetic field, electric field and field of force THM coupling sintering technology, can prepare other double-field coupleds or single game effect sintering technology
The discovery and solution of various new science phenomenons, problem in science are effectively facilitated while the high-performance advanced material that cannot be prepared.
In conclusion the present invention can be widely applied for the sintering process of the materials such as advanced ceramics, hard alloy, functionally gradient material (FGM).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the pressure sintering furnace of magnetic field coupling DC current of the present invention.
Fig. 2 is the sectional view in Fig. 1 at dotted line.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1 and Figure 2, the present invention provides a kind of pressure sintering furnace of magnetic field coupling DC current comprising furnace body 1,
Magnetic field control system 2, control pressurer system 3, DC current generator 4 and overall control center 5.Wherein, overall control center 5 respectively with magnetic
Station control system 2, control pressurer system 3 are connected with DC current generator 4 and control it, and then to setting in furnace body 1
Material to be sintered apply magnetic field, pressure and DC current, to realize the sintering of high performance material.
Furnace body 1 includes upper bell 11, lower bell 12 and furnace body 13；Upper bell 11 and lower bell 12 respectively with furnace body sheet
Body 13 is bolted；13 inner wall of furnace body is provided with water-cooling channel 14, and the water inlet 15 of water-cooling channel 14 is arranged in furnace body sheet
The water outlet 16 of 13 lower part of body, water-cooling channel 14 is arranged on 13 top of furnace body；Furnace body 13 is internally provided with cylindrical shape
Mold 17, and mold 17 is fixed in furnace body 13 by control pressurer system 3.
Magnetic field control system 2 includes magnetic field control device 21 and field generator for magnetic 22.Wherein, field generator for magnetic 22 is in
Hollow cylindrical, and abutting setting is on the outside of mold 17 or 13 inner wall of furnace body is (tight with field generator for magnetic 22 in the present invention
It is sticked to set and be introduced for the inner wall of furnace body 13)；The input terminal of magnetic field control device 21 is connect with overall control center 5,
Output end is connect with field generator for magnetic 22；Magnetic field control signal is sent to magnetic field control device 21, magnetic field control by overall control center 5
Device 21 processed controls the electric current of electromagnetic coil in field generator for magnetic 22 according to the magnetic field control signal received, thus in mold
The magnetic field for acting on material to be sintered is generated at 17.
Control pressurer system 3 includes seaming chuck 31, push-down head 32, hydraulic cylinder 33 and pressure control device 34.Wherein, on
Pressure head 31 is fixed inside furnace body 1, and 31 upper end of seaming chuck is fixed to the existing of top by being pierced by the middle part of upper bell 11
On fixed device, 31 lower end of seaming chuck is inserted into 17 upper end of mold in furnace body 1, and with the material to be sintered that is clamped in mold 17
It is in contact；32 upper end of push-down head extend into 17 lower end of mold in furnace body 1, and connects with the material to be sintered clamped in mold 17
Touching, 32 lower end of push-down head by be pierced by the middle part of 13 bottom of furnace body and lower bell 12 afterwards with the hydraulic oil that is arranged in outside furnace body 1
The output end of cylinder 33 connects；The input terminal of hydraulic cylinder 33 is connect with the output end of pressure control device 34；Pressure control device
34 input terminal is connect with overall control center 5；Pressure controling signal is sent to pressure control device 34, pressure control by overall control center 5
Device 34 processed transmits pressure by the downward pressure head 32 of hydraulic cylinder 33 according to the pressure controling signal received, treats agglomerated material
Unidirectionally pressurizeed.
The output end of DC current generator 4 stretches out upper bell 11 with seaming chuck 31 respectively and push-down head 32 stretches out lower bell
12 part connection, and the junction periphery of seaming chuck 31 and push-down head 32 and 4 output end of DC current generator be surrounded with it is soft
Property insulating layer 41；The input terminal of DC current generator 4 is connect with overall control center 5；Overall control center 5 is by DC current control signal
It is sent to DC current generator 4, DC current generator 4 passes through seaming chuck 31 according to the DC current control signal received
The DC current of mold or material to be sintered is applied through with push-down head 32.
In above-described embodiment, the pressure sintering furnace of magnetic field coupling DC current further includes atmosphere control system 6, control climate
System 6 is connected to by being arranged in inside the air inlet/outlet 18 and furnace body 1 of 13 bottom of furnace body；The input of atmosphere control system 6
End is connect with overall control center 5；Control climate signal is sent to atmosphere control system 6 by overall control center 5, and atmosphere control system 6
The operation for furnace body 1 being vacuumized or being passed through gas is realized by air inlet/outlet 18 according to the control climate signal received.
In above-described embodiment, the pressure sintering furnace of magnetic field coupling DC current further includes cooling system 7, and cooling system 7 is same
When connect with the water outlet 16 at the top of water inlet 15 and furnace body 1 that 1 bottom of furnace body is arranged in；The input terminal of cooling system 7 and total
Control center 5 connects, and cooling water control signal is sent to cooling system 7 by overall control center 5, and cooling system 7 is cold according to what is received
But the flow velocity of water management signal control cooling water.
In above-described embodiment, the pressure sintering furnace of magnetic field coupling DC current further includes that infrared temperature measurement system (does not show in figure
Out), infrared temperature measurement system passes through the temperature on 19 Measurement die of infrared measurement of temperature window, 17 surface being arranged in furnace body 13；It is infrared
Temp measuring system connect with overall control center 5 and feeds back to overall control center 5 temperature information on 17 surface of mold, and overall control center 5 is according to connecing
The temperature signal received sends instruction to cooling system 7 and DC current generator 4, to carry out to the temperature at mold 17 real
When regulate and control.
In above-described embodiment, the electromagnetic coil in field generator for magnetic 22 can be the superconducting coil for generating ultrastrong magnetic field,
It is also possible to generate the normal coil of low high-intensity magnetic field；According to the specific structure difference of field generator for magnetic 22, field generator for magnetic
22 can produce along seaming chuck 31 and 32 axial direction of push-down head and the magnetic field for acting on material to be sintered, or generate perpendicular to seaming chuck
31 and 32 axial direction of push-down head and the magnetic field for acting on material to be sintered.
In above-described embodiment, the operating voltage of DC current generator 4 is 0~1000V, and output electric current is 0~5000A.
In above-described embodiment, the pressure sintering furnace of magnetic field coupling DC current further includes necessary jacking system, automatically controlled system
System, wherein jacking system and electric-control system are using conventional jacking system and electric-control system, and details are not described herein by the present invention.
Based on the pressure sintering furnace of above-mentioned magnetic field coupling DC current, the present invention also provides a kind of magnetic field coupling DC currents
Pressure sintering furnace sintering method, comprising the following steps:
1) it checks and determines that each system of the pressure sintering furnace of magnetic field coupling DC current is working properly, open lower bell 12,
By the lower end cap of mold 17 in 32 upper end of push-down head, material to be sintered is placed in mold 17, closes lower bell 12, and by lower bell
12 are bolted with furnace body 13.
When using this sintering furnace, before being put into material to be sintered, lower bell 12 is opened.Deployment method is the company of unloading
Lower bell 12 is connect with after the bolt of furnace body 13, lower bell 12, push-down head 32 and hydraulic cylinder 33 are in pressure control device 34
Under the action of move down together.Then material to be sintered is placed on mold 17 in 32 upper end of push-down head by the lower end cap of mold 17
It is interior, lower bell 12 is closed, that is, descends bell 12, push-down head 32 and hydraulic cylinder 33 under the action of pressure control device 34 to moving up
It is dynamic, and connect lower bolt between bell 12 and furnace body 13.
2) atmosphere control system 6 is controlled to vacuumizing inside furnace body 1 by overall control center 5, then passes to sintering process rule
Fixed protective gas.
3) sintering process parameter is inputted by overall control center 5, mainly includes that magnetic induction intensity and its action time, pressure are big
Small, heating rate, rate of temperature fall, soaking time etc..
4) magnetic field control system 2 applies the magnetic field for acting on material to be sintered according to technological parameter；Control pressurer system 3
Apply the unidirectional constant pressure for acting on material to be sintered by push-down head 32 according to technological parameter；4 basis of DC current generator
Technological parameter makes material warms to be sintered by seaming chuck 31 and the application DC current of push-down head 32 and keeps the temperature a period of time；Wait burn
Knot material is sintered under the THM coupling effect of magnetic field, DC current and uniaxial pressure.
5) field generator for magnetic 22, DC current generator 4 stop working after the completion of to be sintered, pressure control device 34 by
The gradually pressure of removal push-down head 32；Cooling system 7 controls the flow of cooling water in furnace body 1 simultaneously, promotes 1 internal cooling of furnace body.
6) after temperature is reduced to room temperature in furnace body 1, lower bell 12 is opened, sintered body is taken out；It is then shut off lower bell 12,
Each operational module is closed, sintering is completed.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each component, connection type and manufacture craft etc. are all
It can be varied, all equivalents and improvement carried out based on the technical solution of the present invention should not exclude
Except protection scope of the present invention.
Claims (10)
1. a kind of pressure sintering furnace of magnetic field coupling DC current, it is characterised in that: comprising: furnace body, magnetic field control system, pressure
Force control system, DC current generator and overall control center；
The furnace body includes bolted upper bell, lower bell and furnace body, is provided in the furnace body for pressing from both sides
Hold the mold of material to be sintered；
The magnetic field control system includes magnetic field generator and magnetic field control unit interconnected, and the magnetic field generator setting exists
In the furnace body, for applying magnetic field, the magnetic field control unit and the master control to the material to be sintered in the mold
Center is connected, and the magnetic field for generating to the magnetic field generator controls；
The control pressurer system includes pressure generating unit interconnected and pressure control portion, and the pressure generating unit setting exists
In the furnace body, unidirectionally pressurizeed for fixing the mold, and to the material to be sintered in the mold；The pressure
Force control unit is connected with the overall control center, controls for the pressure to the pressure generating unit；
The DC current generator is connected with the pressure generating unit and overall control center of the control pressurer system respectively, is used for
It is applied through the DC current of the mold or material to be sintered.
2. a kind of pressure sintering furnace of magnetic field coupling DC current as described in claim 1, it is characterised in that: the magnetic field hair
Life portion is the field generator for magnetic in hollow cylindrical, and it is on the outside of the mold or described that the field generator for magnetic is close to setting
Inboard wall of furnace body.
3. a kind of pressure sintering furnace of magnetic field coupling DC current as claimed in claim 2, it is characterised in that: the magnetic field hair
Electromagnetic coil in generating apparatus is superconducting coil or Conventional coil.
4. a kind of pressure sintering furnace of magnetic field coupling DC current as described in claim 1, it is characterised in that: the pressure hair
Life portion includes seaming chuck and push-down head；
The seaming chuck is fixed inside the furnace body, and the seaming chuck upper end is pierced by by the upper bell middle part,
And be fixed on the fixation device at top, the seaming chuck lower end is inserted into the intracorporal mold upper end of the furnace, and with the mould
The material to be sintered clamped in tool is in contact；The push-down head upper end extend into the intracorporal mold lower end of the furnace, and with it is described
The material to be sintered clamped in mold is in contact, and the push-down head lower end in the middle part of the furnace body bottom and lower bell by being pierced by
It is connect afterwards with the pressure control portion being arranged in outside furnace body；
The pressure control portion includes hydraulic cylinder and pressure control device；
The output end of the hydraulic cylinder is connected with the push-down head lower end, the input terminal of the hydraulic cylinder and the pressure control
Device processed is connected, and the input terminal of the pressure control device is connect with the overall control center, is sent according to the overall control center
Pressure controling signal transmits pressure to the push-down head by the hydraulic cylinder, treats agglomerated material and is unidirectionally pressurizeed.
5. a kind of pressure sintering furnace of magnetic field coupling DC current as claimed in claim 4, it is characterised in that: the direct current
The output end of flow-generator stretches out the upper bell with the seaming chuck respectively and the push-down head stretches out the portion of the lower bell
Divide connection, and the junction periphery of the seaming chuck and push-down head and the DC current generator output end is around flexible exhausted
Edge layer；The input terminal of the DC current generator is connect with the overall control center, the direct current sent according to the overall control center
Current controling signal is applied through the DC current of the mold or material to be sintered by the seaming chuck and push-down head.
6. a kind of pressure sintering furnace of magnetic field coupling DC current as claimed in claim 5, it is characterised in that: the direct current
The operating voltage of flow-generator is 0~1000V, and output electric current is 0~5000A.
7. a kind of pressure sintering furnace of magnetic field coupling DC current as described in claim 1, it is characterised in that: the magnetic field coupling
The pressure sintering furnace for closing DC current further includes atmosphere control system, and the atmosphere control system in the furnace body by setting
The air inlet/outlet set is connected to the furnace interior；The atmosphere control system is connect with the overall control center, according to described total
The control climate signal that control center is sent realizes the operation for the furnace body being vacuumized or being passed through gas by the air inlet/outlet.
8. a kind of pressure sintering furnace of magnetic field coupling DC current as described in claim 1, it is characterised in that: the magnetic field coupling
Close DC current pressure sintering furnace further include cooling system, the cooling system be arranged in the furnace body bottom into
The mouth of a river is connected with the water outlet being arranged at the top of the furnace body, and the inlet and outlet are with setting in the furnace
The water-cooling channel of body inner body wall is connected；The input terminal of the cooling system is connect with the overall control center, according to described total
The cooling water control signal that control center is sent, controls the flow velocity of cooling water.
9. a kind of pressure sintering furnace of magnetic field coupling DC current as described in claim 1, it is characterised in that: the magnetic field coupling
The pressure sintering furnace for closing DC current further includes infrared temperature measurement system, and the infrared temperature measurement system is arranged by the furnace body side
The infrared measurement of temperature window temperature of the die surface is detected, and will test temperature signal be sent in the master control
The heart, the overall control center carry out real-time monitoring to the temperature at the mold according to the temperature signal received.
10. a kind of sintering method using the sintering furnace as described in any one of claim 1~9, it is characterised in that including following step
It is rapid:
1) it checks and determines that each system of the pressure sintering furnace of magnetic field coupling DC current is working properly, lower bell is opened, by mold
Lower end cap places material to be sintered in mold in push-down head upper end, closes lower bell, and by lower bell and furnace body bolt
Connection；
2) atmosphere control system is controlled by overall control center to vacuumize furnace interior, then pass to protection as defined in sintering process
Gas；
3) sintering process parameter, including magnetic induction intensity and its action time, pressure size, heating speed are inputted by overall control center
Rate, rate of temperature fall and soaking time；
4) overall control center controls magnetic field control system and applies the magnetic for acting on material to be sintered according to the sintering process parameter of setting
?；Control DC current generator, which applies DC current by seaming chuck and push-down head, to be made material warms to be sintered and keeps the temperature to preset
Time；Control control pressurer system applies the unidirectional constant pressure for acting on material to be sintered by push-down head, so as to be sintered
Material is sintered under the THM coupling effect of magnetic field, DC current and uniaxial pressure；
5) after the completion of to be sintered, control magnetic field control system, DC current generator stop working, and pressure control device gradually unloads
Except the pressure of push-down head；The flow of cooling water, promotes furnace interior cooling in the furnace body of cooling system control simultaneously；
6) after furnace body temperature is reduced to room temperature, lower bell is opened, sintered body is taken out, is then shut off lower bell, closes each system
System, sintering are completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094485.8A CN109631568A (en) | 2019-01-30 | 2019-01-30 | A kind of pressure sintering furnace and sintering method of magnetic field coupling DC current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910094485.8A CN109631568A (en) | 2019-01-30 | 2019-01-30 | A kind of pressure sintering furnace and sintering method of magnetic field coupling DC current |
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