CN104128592B - Device for refining metal solidification structure with electric current pulses - Google Patents
Device for refining metal solidification structure with electric current pulses Download PDFInfo
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- CN104128592B CN104128592B CN201410397772.3A CN201410397772A CN104128592B CN 104128592 B CN104128592 B CN 104128592B CN 201410397772 A CN201410397772 A CN 201410397772A CN 104128592 B CN104128592 B CN 104128592B
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 43
- 239000002184 metal Substances 0.000 title claims abstract description 43
- 238000007711 solidification Methods 0.000 title claims abstract description 30
- 230000008023 solidification Effects 0.000 title claims abstract description 30
- 238000007670 refining Methods 0.000 title abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 64
- 238000003723 Smelting Methods 0.000 claims abstract description 48
- 239000000498 cooling water Substances 0.000 claims abstract description 24
- 239000010425 asbestos Substances 0.000 claims description 32
- 229910052895 riebeckite Inorganic materials 0.000 claims description 32
- 239000002826 coolant Substances 0.000 claims description 8
- 230000005619 thermoelectricity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 45
- 230000008569 process Effects 0.000 abstract description 27
- 238000001816 cooling Methods 0.000 abstract description 23
- 238000012545 processing Methods 0.000 abstract description 13
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- 238000009413 insulation Methods 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 4
- 241001062472 Stokellia anisodon Species 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 229910001018 Cast iron Inorganic materials 0.000 description 25
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 25
- 229910052804 chromium Inorganic materials 0.000 description 25
- 239000011651 chromium Substances 0.000 description 25
- 238000000137 annealing Methods 0.000 description 18
- 229910000676 Si alloy Inorganic materials 0.000 description 8
- 229910001128 Sn alloy Inorganic materials 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
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- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 6
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The invention relates to a device for refining a metal solidification structure with electric current pulses, and belongs to the technical field of metal material machining. The device mainly comprises a smelting device, an electric current pulse generating device and a heat insulation and solidification device. The smelting device is used for smelting molten metal, an appropriate pouring temperature is controlled, and the molten metal is injected into the heat insulation and solidification device through a pouring channel. In the solidification process, the electric current pulse generating device is used for exerting the electric current pulses with in a certain parameter range, and the metal solidification structure is refined. In the refining process, the cooling speed of the molten metal can be controlled by the means of heat insulation or heating or introducing of cooling water, the structure is promoted to be solidified simultaneously, and therefore a refining technology is optimized. The device integrates with smelting, pouring and solidifying with electric current pulse refining processing of alloy, the entire process is achieved at a time, the process is simple, the repeatability is high, a good effect is achieved on refining the metal solidification structure, and meanwhile the quality of the processed smelt and the controllability of the processing process are improved.
Description
Technical field
The present invention relates to a kind of device of pulse current thinning metal solidification texture, belong to metal material processing technology neck
Domain.
Background technology
In materials science field, the refinement of metal solidification texture is the weight improving metal material performance and expanding purposes
Want one of approach.With the development of modern science and technology, the requirement to material property for the people improves constantly, metal solidification texture
Refinement or improvement are conducive to improving the mechanical property of material.With the continuous development of solidification technology, many emerging solidified structures
Process for refining arises at the historic moment, the wherein impact to metal solidification texture for the pulse current (electric current pulse, ecp)
Very notable, substantially, cleaning is effectively, with low cost, becomes the focus of current research for thinning effect.
It is known that under conditions of not changing alloying component, by suitable material deformation process or Technology for Heating Processing,
The tissue that metal material can be made occurs significantly to refine, thus reaching the purpose improving its performance.From before the sixties in last century
Since Soviet scientists o.a.troitskii finds electro plastic effect, pulsed current annealing is thin as a kind of special material
Change processing method to receive significant attention.The mechanism of action of pulse current thinning metal solidification texture mainly has the following aspects:
Fluctuation effect, Kelvin effect, electromigration effect, joule effect, peltier effect etc..
Current pulsed current annealing method mainly has two kinds, and one kind is that metal bath is poured in casting mold, directly exists
In casting mold, pulse current is applied to metal bath, reach the purpose of thinning solidification structure.This kind of method is simple to operate, operation letter
Clean, application is more universal.But metal bath rate of cooling in casting mold is very fast, and cooling procedure is wayward, therefore limits pulse
The thinning effect of electric current.Another kind of method is by test button remelting, by heating sample remelting in a furnace, in a furnace
Control metal bath rate of cooling, cooling procedure applies pulse current.But this kind of method carries out secondary remelting, gesture to sample
Impact must be produced on the composition of alloy, and sample is oxidized easily in reflow process, so that the quality of materials of acquisition is reduced.Separately
Outward, the increase of remelting operation is also not easy to commercial Application.Accordingly, it would be desirable to develop a kind of specialty being applied to pulsed current annealing
Solidification equipment, makes the melting of alloy, cast, solidification, pulse current micronization processes once complete, simplifies pulsed current annealing technique
And intensifier pulse current processing effect.The process quality of melt and the controllability of processing procedure can be improved simultaneously.
Content of the invention
For the unfavorable problem during the existing pulse current thinning metal solidification texture of solution, simplify pulsed current annealing work
Sequence, intensifier pulse current processing effect simultaneously optimizes pulsed current annealing technique, improves simultaneously and processes the quality of melt and processed
The controllability of journey.The present invention is intended to provide a kind of pulse current thinning metal solidification texture device, this device include smelting furnace 1, plus
Heat coil 2, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse
Power supply 13, compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, whole for supporting
Individual device；Smelting furnace 1 is located on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Portion stretches into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, holding furnace 7
Top is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electricity
Pole 16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 He
Electrode 16 is connected, and smelting furnace 1 is placed in tiltable on support 5.
Crystallizer 12 hollow of the present invention, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, crystallization
Device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
Electrode 16 of the present invention and thermocouple 17 stretch into crystallizer 12 through heat-insulated asbestos 15, can move up and down；And
And can be preheated to crystallizer 12, electrode 16 and thermocouple 17 by the heating coil 8 of holding furnace 7.
High-voltage pulse power source 13 waveform of the present invention is multigroup sawtooth-shaped pulse ripple, and voltage is 0～1600v, and frequency is 0
～50hz, pulsewidth is 10～100 μ s.
The use process of device of the present invention: heated using heating coil 2 in smelting furnace 1, melt out metal bath 4,
Measure the temperature of metal bath 4 with thermocouple 3, control suitable pouring temperature；After reaching pouring temperature requirement, by support 5
Tilt, make metal bath 4 inject crystallizer 12 along running channel 6；Cast start before, first with holding furnace 7 heating coil 8 to knot
Brilliant device 12, electrode 16 and thermocouple 17 are preheated, and make thermocouple 17 measured temperature synchronous with thermocouple 3 measured temperature；
It is poured into the temperature after crystallizer 12, surveyed according to thermocouple 17 after metal bath 4, the power of adjustment heating coil 8 comes
It is incubated；In cooling procedure, it is passed through to crystallizer cooling water inlet 11 by adjusting the power or adjust of heating coil 8
The speed of cooling water is controlling the rate of cooling of metal bath 4；Meanwhile, electrode 16 and thermocouple 17 are extend into metal bath
In 4, open high-voltage pulse power source 13, metal bath 4 is applied with the pulse current of certain parameter；After pulsed current annealing terminates,
Electrode 16 and thermocouple 17 are moved up and withdraws from metal bath 4.In whole processing procedure, by adjusting high-voltage pulse electric
The parameter in source 13, pulsed current annealing time, the power of heating coil 8 and be passed through cooling to crystallizer cooling water inlet 11
The speed of water, to obtain, crystal grain is tiny, even tissue metal solidification texture.
Beneficial effects of the present invention:
(1) device of the present invention can effective control metal bath rate of cooling, under certain rate of cooling apply
Pulse current, promotion organization solidifies simultaneously, crystal grain thinning, improves material property；
(2) device of the present invention is applicable to the refinement of the solidified structure of different-alloy, is widely used；
(3) melting of device sets gold of the present invention, cast, solidification and pulse current micronization processes are integrated, entirely
Process disposably completes, and operation is simple, repeatable strong, optimizes pulsed current annealing technique；
(4) device of the present invention has good result to the refinement of metal solidification texture, improves process melt simultaneously
Quality and processing procedure controllability.
Brief description
Fig. 1 is the structural representation of device of the present invention；
Fig. 2 is the metallographic structure figure before micronization processes；
Fig. 3 is the metallographic structure figure after the embodiment of the present invention 1 micronization processes；
Fig. 4 is the metallographic structure figure after the embodiment of the present invention 2 micronization processes；
Fig. 5 is the metallographic structure figure after the embodiment of the present invention 3 micronization processes.
In figure: 1- smelting furnace, 2- heating coil, 3- thermocouple, 4- metal bath, 5- support, 6- running channel, 7- holding furnace,
8- heating coil, 9- support, 10- crystallizer coolant outlet, 11- crystallizer cooling water inlet, 12- crystallizer, 13- is high
The pressure pulse power, 14- compensating wire, the heat-insulated asbestos of 15-, 16- electrode, 17- thermocouple.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is described in further detail, but protection scope of the present invention
It is not limited to described content.
Embodiment 1
The device of pulse current thinning metal solidification texture described in the present embodiment, this device includes smelting furnace 1, heating coil
2nd, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse power source 13,
Compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, for supporting whole device；
Smelting furnace 1 is located at tiltable on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Stretch into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, the top of holding furnace 7
Portion is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electrode
16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 and electricity
Pole 16 is connected, as shown in Figure 1.
Crystallizer 12 hollow described in the present embodiment, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, knot
Brilliant device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
High-voltage pulse power source 13 waveform described in the present embodiment is multigroup sawtooth-shaped pulse ripple, and voltage is 500v, and frequency is
45hz, pulsewidth is 10 μ s.
Coagulated with pulse current refinement hypereutectic high chromium cast iron (1337 DEG C of liquidus temperature, 1276 DEG C of solidus temperature) below
Gu as a example tissue, and combining accompanying drawing being further described using process to device of the present invention:
As shown in figure 1, being heated using heating coil 2 in smelting furnace 1, melting out hypereutectic high chromium cast iron melt, using thermoelectricity
The temperature of even 3 measurement hypereutectic high chromium cast iron melts, controls 1400 DEG C of pouring temperature；Support 5 is tilted, makes hypereutectic high-chromium
Molten cast iron injects crystallizer 12 along running channel 6；Cast start before, first with holding furnace 7 heating coil 8 to crystallizer 12,
Electrode 16 and thermocouple 17 are preheated, and make thermocouple 17 measured temperature synchronous with thermocouple 3 measured temperature；Treated common
After brilliant rich chromium cast iron melt cast enters crystallizer 12, the temperature surveyed according to thermocouple 17, adjust heating coil 8 power,
Insulation 3min；It is then shut off heating coil 8, in cooling procedure, electrode 16 and thermocouple 17 are extend into hypereutectic height
In chrome cast iron melt, open high-voltage pulse power source 13, pulse current, pulsed current annealing are applied to hypereutectic high chromium cast iron melt
Time 6.5min；After pulsed current annealing terminates, electrode 16 and thermocouple 17 are moved up and withdraw from hypereutectic high chromium cast iron
Melt, cools to room temperature with the furnace.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains is as shown in figure 3, organize (as shown in Figure 2) with before processing
Contrast, the solidified structure crystal grain after process is tiny, even tissue.
Embodiment 2
The device of pulse current thinning metal solidification texture described in the present embodiment, this device includes smelting furnace 1, heating coil
2nd, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse power source 13,
Compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, for supporting whole device；
Smelting furnace 1 is located at tiltable on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Stretch into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, the top of holding furnace 7
Portion is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electrode
16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 and electricity
Pole 16 is connected, as shown in Figure 1.
Crystallizer 12 hollow described in the present embodiment, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, knot
Brilliant device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
Electrode 16 described in the present embodiment and thermocouple 17 stretch into crystallizer 12 through heat-insulated asbestos 15, can move up and down；
And can be preheated to crystallizer 12, electrode 16 and thermocouple 17 by the heating coil 8 of holding furnace 7.
High-voltage pulse power source 13 waveform described in the present embodiment is multigroup sawtooth-shaped pulse ripple, and voltage is 1000v, and frequency is
45hz, pulsewidth is 100 μ s.
Coagulated with pulse current refinement hypereutectic high chromium cast iron (1337 DEG C of liquidus temperature, 1276 DEG C of solidus temperature) below
Gu as a example tissue, and combining accompanying drawing being further described using process to device of the present invention.
As shown in figure 1, being heated using heating coil 2 in smelting furnace 1, melting out hypereutectic high chromium cast iron melt, using thermoelectricity
The temperature of even 3 measurement hypereutectic high chromium cast iron melts, controls 1400 DEG C of pouring temperature；Hypereutectic high chromium cast iron melt edge is poured
Road 6 injects crystallizer 12；Cast start before, first with holding furnace 7 heating coil 8 to crystallizer 12, electrode 16 and thermoelectricity
Even 17 are preheated, and make thermocouple 17 measured temperature synchronous with thermocouple 3 measured temperature；Treat that hypereutectic high chromium cast iron melts
After body is poured into crystallizer 12, the temperature surveyed according to thermocouple 17, adjust heating coil 8 power, be incubated 3min；Then
Close heating coil 8, in cooling procedure, electrode 16 and thermocouple 17 extend in hypereutectic high chromium cast iron melt,
Open high-voltage pulse power source 13, pulse current, pulsed current annealing time 3min are applied to hypereutectic high chromium cast iron melt；Pulse
After current processing terminates, electrode 16 and thermocouple 17 are moved up and withdraws from hypereutectic high chromium cast iron melt, cool to the furnace
Room temperature.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains is as shown in figure 4, organize (as shown in Figure 2) with before processing
Contrast, the solidified structure crystal grain after process is tiny, even tissue.
Embodiment 3
The device of pulse current thinning metal solidification texture described in the present embodiment, this device includes smelting furnace 1, heating coil
2nd, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse power source 13,
Compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, for supporting whole device；
Smelting furnace 1 is located at tiltable on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Stretch into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, the top of holding furnace 7
Portion is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electrode
16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 and electricity
Pole 16 is connected, as shown in Figure 1.
Crystallizer 12 hollow described in the present embodiment, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, knot
Brilliant device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
High-voltage pulse power source 13 waveform described in the present embodiment is multigroup sawtooth-shaped pulse ripple, and voltage is 1200v, and frequency is
45hz, pulsewidth is 10 μ s.
Coagulated with pulse current refinement hypereutectic high chromium cast iron (1337 DEG C of liquidus temperature, 1276 DEG C of solidus temperature) below
Gu as a example tissue, and combining accompanying drawing being further described using process to device of the present invention:
As shown in figure 1, being heated using heating coil 2 in smelting furnace 1, melting out hypereutectic high chromium cast iron melt, using thermoelectricity
The temperature of even 3 measurement hypereutectic high chromium cast irons, controls 1400 DEG C of pouring temperature；Support 5 is tilted, makes hypereutectic high chromium cast iron
Melt injects crystallizer 12 along running channel 6；Cast start before, first with holding furnace 7 heating coil 8 to crystallizer 12, electrode
16 and thermocouple 17 preheated, make thermocouple 17 measured temperature and thermocouple 3 measured temperature synchronous；Treat hypereutectic height
After chrome cast iron melt cast enters crystallizer 12, the temperature surveyed according to thermocouple 17, adjust heating coil 8 power, insulation
3min；It is then shut off heating coil 8, in cooling procedure, electrode 16 and thermocouple 17 are extend into hypereutectic high-chromium casting
In fusant, open high-voltage pulse power source 13, pulse current, pulsed current annealing time are applied to hypereutectic high chromium cast iron melt
14min；After pulsed current annealing terminates, electrode 16 and thermocouple 17 are moved up and withdraw from hypereutectic high chromium cast iron melt,
It is passed through cooling water to crystallizer cooling water inlet 11 simultaneously, be cooled to room temperature.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains is as shown in figure 5, organize (as shown in Figure 2) with before processing
Contrast, the solidified structure crystal grain after process is tiny, even tissue.
Embodiment 4
The device of pulse current thinning metal solidification texture described in the present embodiment, this device includes smelting furnace 1, heating coil
2nd, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse power source 13,
Compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, for supporting whole device；
Smelting furnace 1 is located at tiltable on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Stretch into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, the top of holding furnace 7
Portion is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electrode
16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 and electricity
Pole 16 is connected, as shown in Figure 1.
Crystallizer 12 hollow described in the present embodiment, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, knot
Brilliant device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
High-voltage pulse power source 13 waveform described in the present embodiment is multigroup sawtooth-shaped pulse ripple, and voltage is 1200v, and frequency is
30hz, pulsewidth is 30 μ s.
Below al-25%si alloy (778 DEG C of liquidus temperature, 577 DEG C of solidus temperature) solidification group is refined with pulse current
It is woven to example, and combine accompanying drawing being further described using process to device of the present invention:
As shown in figure 1, being heated using heating coil 2 in smelting furnace 1, melting out al-25%si alloy melt, using thermocouple
The temperature of 3 measurement al-25%si alloy melts, controls 790 DEG C of pouring temperature；Support 5 is tilted, so that al-25%si alloy is melted
Body injects crystallizer 12 along running channel 6；Cast start before, first with holding furnace 7 heating coil 8 to crystallizer 12, electrode 16
And thermocouple 17 is preheated, make thermocouple 17 measured temperature synchronous with thermocouple 3 measured temperature；Treat that al-25%si closes
After golden melt cast enters crystallizer 12, the temperature surveyed according to thermocouple 17, adjust heating coil 8 power, be incubated 2h；So
Adjust heating coil 8 power afterwards, control al-25%si alloy rate of cooling, in cooling procedure, by electrode 16 and thermocouple
17 extend in al-25%si alloy melt, open high-voltage pulse power source 13, and al-25%si alloy melt is applied with pulse electricity
Stream, pulsed current annealing time 3min；After pulsed current annealing terminates, electrode 16 and thermocouple 17 are moved up and withdraw from
Al-25%si alloy melt, is passed through cooling water to crystallizer cooling water inlet 11 simultaneously, is cooled to room temperature.
Embodiment 5
The device of pulse current thinning metal solidification texture described in the present embodiment, this device includes smelting furnace 1, heating coil
2nd, thermocouple 3, support 5, running channel 6, holding furnace 7, heating coil 8, support 9, crystallizer 12, high-voltage pulse power source 13,
Compensating wire 14, heat-insulated asbestos 15, electrode 16, thermocouple 17, support 5 is connected with support 9, for supporting whole device；
Smelting furnace 1 is located at tiltable on support 5, and the side wall of smelting furnace 1 is provided with heating coil 2, and thermocouple 3 hangs on the top of smelting furnace 1
Stretch into inside smelting furnace 1；Holding furnace 7 is located on support 9, and the side wall of holding furnace 7 is provided with heating coil 8, the top of holding furnace 7
Portion is coated with heat-insulated asbestos 15；Crystallizer 12 is placed in holding furnace 7, and running channel 6 passes through heat-insulated asbestos 15 to be directed at crystallizer 12；Electrode
16 and thermocouple 17 stretch into inside crystallizer 12 through heat-insulated asbestos 15；High-voltage pulse power source 13 passes through compensating wire 14 and electricity
Pole 16 is connected, as shown in Figure 1.
Crystallizer 12 hollow described in the present embodiment, the side wall lower ends of crystallizer 12 are provided with crystallizer coolant outlet 10, knot
Brilliant device cooling water inlet 11, can control metal bath rate of cooling by being incubated, heating or be passed through the means such as cooling water.
High-voltage pulse power source 13 waveform described in the present embodiment is multigroup sawtooth-shaped pulse ripple, and voltage is 1400v, and frequency is
30hz, pulsewidth is 50 μ s.
Below with pulse current refinement cu-10%sn alloy (1021 DEG C of liquidus temperature, 830 DEG C of solidus temperature) solidification
As a example tissue, and combine accompanying drawing being further described using process to device of the present invention:
As shown in figure 1, being heated using heating coil 2 in smelting furnace 1, melting out cu-10%sn alloy melt, using thermocouple
The temperature of 3 measurement cu-10%sn alloy melts, controls 1180 DEG C of pouring temperature；Support 5 is tilted, so that cu-10%sn alloy is melted
Body injects crystallizer 12 along running channel 6；Cast start before, first with holding furnace 7 heating coil 8 to crystallizer 12, electrode 16
And thermocouple 17 is preheated, make thermocouple 17 measured temperature synchronous with thermocouple 3 measured temperature；Treat that cu-10%sn closes
After golden melt cast enters crystallizer 12, the temperature surveyed according to thermocouple 17, adjust heating coil 8 power, insulation
30min；Then adjust heating coil 8 Power Control cu-10%sn alloy melt rate of cooling, in cooling procedure, by electrode
16 and thermocouple 17 extend in cu-10%sn alloy melt, open high-voltage pulse power source 13, to cu-10%sn alloy melt
Apply pulse current, pulsed current annealing time 3min；After pulsed current annealing terminates, by electrode 16 and thermocouple 17 upwards
Cu-10%sn alloy melt is withdrawn from movement, is passed through cooling water to crystallizer cooling water inlet 11 simultaneously, is cooled to room temperature.
Claims (1)
1. a kind of device of pulse current thinning metal solidification texture it is characterised in that: this device includes smelting furnace (1), heater wire
Circle (2), thermocouple (3), support (5), running channel (6), holding furnace (7), heating coil (8), support (9), crystallizer
(12), high-voltage pulse power source (13), compensating wire (14), heat-insulated asbestos (15), electrode (16), thermocouple (17), support
(5) it is connected with support (9), for supporting whole device；Smelting furnace (1) is located on support (5), and the side wall of smelting furnace (1) is provided with
Heating coil (2), smelting furnace (1) inside is stretched at the top that thermocouple (3) hangs on smelting furnace (1)；Holding furnace (7) is located at support
(9), on, the side wall of holding furnace (7) is provided with heating coil (8), and the top of holding furnace (7) is coated with heat-insulated asbestos (15)；Knot
Brilliant device (12) is placed in holding furnace (7), and running channel (6) passes through heat-insulated asbestos (15) be aligned crystallizer (12)；Electrode (16) and thermoelectricity
It is internal that even (17) stretch into crystallizer (12) through heat-insulated asbestos (15)；High-voltage pulse power source (13) pass through compensating wire (14) and
Electrode (16) is connected；Described crystallizer (12) hollow, the side wall lower ends of crystallizer (12) be provided with crystallizer coolant outlet (10),
Crystallizer cooling water inlet (11)；Described high-voltage pulse power source (13) waveform is multigroup sawtooth-shaped pulse ripple；Smelting furnace (1) is placed in and props up
The upper tiltable of frame (5)；Described electrode (16) and thermocouple (17) stretch into crystallizer (12) through heat-insulated asbestos (15), can go up
Lower movement.
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| CN105220225B (en) * | 2015-10-27 | 2018-02-06 | 辽宁工业大学 | A kind of method that metallic crystal grows in Electric Pulse Treatment technical controlling directional solidification process |
| CN106424668B (en) * | 2016-09-13 | 2018-11-27 | 昆明理工大学 | A method of improving iron casting corrosion resistance |
| CN108380851A (en) * | 2018-01-24 | 2018-08-10 | 重庆文理学院 | A kind of device and its process for refining of multi- scenarios method thinning metal solidification texture |
| CN109175315B (en) * | 2018-09-27 | 2021-01-19 | 太原科技大学 | Preparation method of copper-iron immiscible alloy |
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| RU2409449C2 (en) * | 2008-12-23 | 2011-01-20 | Открытое Акционерное Общество Научно-Производственная Корпорация "Уралвагонзавод" Имени Ф.Э. Дзержинского | Installation for processing melted metal by electromagnetic radiaiton |
| CN101885053A (en) * | 2010-06-24 | 2010-11-17 | 西北工业大学 | Strong pulse current orientated solidification grain ultra-fining method and device |
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| CN103658609A (en) * | 2013-12-09 | 2014-03-26 | 上海大学 | Method for composite refined metal solidification structure through pulse currents and liquid pulse magneto oscillation |
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