CN104128592A - 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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- CN104128592A CN104128592A CN201410397772.3A CN201410397772A CN104128592A CN 104128592 A CN104128592 A CN 104128592A CN 201410397772 A CN201410397772 A CN 201410397772A CN 104128592 A CN104128592 A CN 104128592A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 47
- 239000002184 metal Substances 0.000 title claims abstract description 47
- 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
- 238000003723 Smelting Methods 0.000 claims abstract description 48
- 238000009413 insulation Methods 0.000 claims abstract description 40
- 239000000498 cooling water Substances 0.000 claims abstract description 25
- 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
- 238000000034 method Methods 0.000 abstract description 39
- 238000012545 processing Methods 0.000 abstract description 32
- 238000001816 cooling Methods 0.000 abstract description 21
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 5
- 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 27
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 27
- 229910052804 chromium Inorganic materials 0.000 description 27
- 239000011651 chromium Substances 0.000 description 27
- 229910000676 Si alloy Inorganic materials 0.000 description 9
- 229910001128 Sn alloy Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000013078 crystal Substances 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000005679 Peltier effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 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
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000000048 melt cooling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 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 technical field.
Background technology
In materials science field, the refinement of metal solidification texture is to improve metal material performance and expand one of important channel of purposes.Along with the development of modern science and technology, people improve constantly the requirement of material property, and the refinement of metal solidification texture or improvement are conducive to improve the mechanical property of material.Development along with solidification technology, many emerging solidified structure process for refining arise at the historic moment, pulse current (Electric Current Pulse wherein, ECP) very remarkable on the impact of metal solidification texture, thinning effect is obvious, clean effectively, with low cost, become the focus of current research.
As everyone knows, do not changing under the condition of alloying component, by suitable material deformation, processing or Technology for Heating Processing, can make the tissue of metal material that obvious refinement occurs, thereby reach the object of improving its performance.Since the sixties in last century, the scientist of former Soviet Union O.A.Troitskii found electro plastic effect, pulse current is processed and is subject to extensive concern as a kind of special material thinning processing method.The mechanism of action of pulse current thinning metal solidification texture mainly contains the following aspects: fluctuation effect, Kelvin effect, electromigration effect, Joule effect, Peltier effect etc.
Current pulse current processing method mainly contains two kinds, and a kind of is that metal bath is poured in casting mold, directly in casting mold, metal bath is applied to pulse current, reaches the object of thinning solidification structure.This kind of method is simple to operate, and operation is succinct, applies more general.But metal bath cooling velocity in casting mold is very fast, and cooling procedure is wayward, therefore limited the thinning effect of pulse current.Another kind method is by test button remelting, by heating in stove, by sample remelting, controls metal bath cooling velocity in stove, applies pulse current in cooling procedure.But this kind of method carried out secondary remelting to sample, composition that will certainly alloy exerts an influence, and sample is easily oxidized in reflow process, and the quality of materials obtaining is reduced.The increase of remelting operation in addition, is also not easy to commercial Application.Therefore, need to develop a kind of professional solidification equipment that pulse current is processed that is applicable to, make alloy melting, pour into a mould, solidify, pulse current thinning processing once completes, and simplifies pulse current treatment process intensifier pulse current processing effect.Can improve and process the quality of melt and the controllability of processing procedure simultaneously.
Summary of the invention
For solving the unfavorable problem in existing pulse current thinning metal solidification texture process, simplify pulse current treatment process, intensifier pulse current processing effect is also optimized pulse current treatment process, improves simultaneously and processes the quality of melt and the controllability of processing procedure.The present invention aims to provide a kind of pulse current thinning metal solidification texture device, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, and smelting furnace 1 is placed in tiltable in support I 5.
Crystallizer 12 hollows of the present invention, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Electrode 16 of the present invention and thermocouple II 17 stretch into crystallizer 12 through heat insulation asbestos 15, can move up and down; And can to crystallizer 12, electrode 16 and thermocouple II 17, carry out preheating by 8 pairs of the heater coil II of holding furnace 7.
High-voltage pulse power source 13 waveforms of the present invention are many group zigzag impulse waves, and voltage is 0～1600V, and frequency is 0～50Hz, and pulsewidth is 10～100 μ s.
The use procedure of device of the present invention: utilize 2 heating of heater coil I in smelting furnace 1, melt out metal bath 4, measure the temperature of metal bath 4 by thermocouple I 3, control suitable pouring temperature; Reach after pouring temperature requirement, support I 5 is tilted, make metal bath 4 inject crystallizers 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After metal bath 4 is poured into crystallizer 12, the temperature of surveying according to thermocouple II 17, the power of adjusting heater coil II 8 is incubated; In cooling procedure, by adjusting the power of heater coil II 8 or adjusting the cooling velocity that the speed that passes into cooling water to crystallizer cooling water inlet 11 is controlled metal bath 4; , electrode 16 and thermocouple II 17 are extend in metal bath 4 meanwhile, open high-voltage pulse power source 13, metal bath 4 is applied to the pulse current of certain parameter; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from metal bath 4.In whole processing procedure, by adjusting parameter, pulse current processing time, the power of heater coil II 8 and the speed that passes into cooling water to crystallizer cooling water inlet 11 of high-voltage pulse power source 13, to obtain, crystal grain is tiny, the metal solidification texture of even tissue.
Beneficial effect of the present invention:
(1) device of the present invention can effectively be controlled the cooling velocity of metal bath, under certain cooling velocity, applies pulse current, promotes to organize simultaneously to solidify that crystal grain thinning improves material property;
(2) device of the present invention, applicable to the refinement of the solidified structure of different-alloy, is widely used;
(3) melting of device sets gold of the present invention, pour into a mould, solidify and pulse current thinning processing is integrated, whole process is disposable to be completed, and operation is simple, repeatable strong, has optimized pulse current treatment process;
(4) device of the present invention has good result to the refinement of metal solidification texture, has improved simultaneously and has processed the quality of melt and the controllability of processing procedure.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention;
Fig. 2 is the metallographic structure figure before thinning processing;
Fig. 3 is the metallographic structure figure after the embodiment of the present invention 1 thinning processing;
Fig. 4 is the metallographic structure figure after the embodiment of the present invention 2 thinning processing;
Fig. 5 is the metallographic structure figure after the embodiment of the present invention 3 thinning processing.
In figure: 1-smelting furnace, 2-heater coil I, 3-thermocouple I, 4-metal bath, 5-support I, 6-running channel, 7-holding furnace, 8-heater coil II, 9-support II, 10-crystallizer coolant outlet, 11-crystallizer cooling water inlet, 12-crystallizer, 13-high-voltage pulse power source, 14-compensating wire, the heat insulation asbestos of 15-, 16-electrode, 17-thermocouple II.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but protection scope of the present invention is not limited to described content.
Embodiment 1
The device of pulse current thinning metal solidification texture described in the present embodiment, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned at tiltable in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, as shown in Figure 1.
Crystallizer 12 hollows described in the present embodiment, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Described in the present embodiment, high-voltage pulse power source 13 waveforms are many group zigzag impulse waves, and voltage is 500V, and frequency is 45Hz, and pulsewidth is 10 μ s.
With pulse current refinement hypereutectic high chromium cast iron (1337 ℃ of liquidus temperatures, 1276 ℃ of solidus temperatures) solidified structure, be example, and by reference to the accompanying drawings the use procedure of device of the present invention be further described below:
As shown in Figure 1, in smelting furnace 1, utilize 2 heating of heater coil I, melt out hypereutectic high chromium cast iron melt, by thermocouple I 3, measure the temperature of hypereutectic high chromium cast iron melt, control 1400 ℃ of pouring temperatures; Support I 5 is tilted, make hypereutectic high chromium cast iron melt inject crystallizer 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After hypereutectic high chromium cast iron melt cast enters crystallizer 12, the temperature of surveying according to thermocouple II 17, adjusts heater coil II 8 power, insulation 3min; Then close heater coil II 8, in cooling procedure, electrode 16 and thermocouple II 17 are extend in hypereutectic high chromium cast iron melt, open high-voltage pulse power source 13, hypereutectic high chromium cast iron melt is applied to pulse current, pulse current processing time 6.5min; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from hypereutectic high chromium cast iron melt, cool to room temperature with the furnace.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains as shown in Figure 3, with process before tissue (as shown in Figure 2) contrast, solidified structure crystal grain after processing is tiny, even tissue.
Embodiment 2
The device of pulse current thinning metal solidification texture described in the present embodiment, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned at tiltable in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, as shown in Figure 1.
Crystallizer 12 hollows described in the present embodiment, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Described in the present embodiment, electrode 16 and thermocouple II 17 stretch into crystallizer 12 through heat insulation asbestos 15, can move up and down; And can to crystallizer 12, electrode 16 and thermocouple II 17, carry out preheating by 8 pairs of the heater coil II of holding furnace 7.
Described in the present embodiment, high-voltage pulse power source 13 waveforms are many group zigzag impulse waves, and voltage is 1000V, and frequency is 45Hz, and pulsewidth is 100 μ s.
With pulse current refinement hypereutectic high chromium cast iron (1337 ℃ of liquidus temperatures, 1276 ℃ of solidus temperatures) solidified structure, be example, and by reference to the accompanying drawings the use procedure of device of the present invention be further described below.
As shown in Figure 1, in smelting furnace 1, utilize 2 heating of heater coil I, melt out hypereutectic high chromium cast iron melt, by thermocouple I 3, measure the temperature of hypereutectic high chromium cast iron melt, control 1400 ℃ of pouring temperatures; Hypereutectic high chromium cast iron melt is injected to crystallizer 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After hypereutectic high chromium cast iron melt cast enters crystallizer 12, the temperature of surveying according to thermocouple II 17, adjusts heater coil II 8 power, insulation 3min; Then close heater coil II 8, in cooling procedure, electrode 16 and thermocouple II 17 are extend in hypereutectic high chromium cast iron melt, open high-voltage pulse power source 13, hypereutectic high chromium cast iron melt is applied to pulse current, pulse current processing time 3min; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from hypereutectic high chromium cast iron melt, cool to room temperature with the furnace.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains as shown in Figure 4, with process before tissue (as shown in Figure 2) contrast, solidified structure crystal grain after processing is tiny, even tissue.
Embodiment 3
The device of pulse current thinning metal solidification texture described in the present embodiment, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned at tiltable in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, as shown in Figure 1.
Crystallizer 12 hollows described in the present embodiment, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Described in the present embodiment, high-voltage pulse power source 13 waveforms are many group zigzag impulse waves, and voltage is 1200V, and frequency is 45Hz, and pulsewidth is 10 μ s.
With pulse current refinement hypereutectic high chromium cast iron (1337 ℃ of liquidus temperatures, 1276 ℃ of solidus temperatures) solidified structure, be example, and by reference to the accompanying drawings the use procedure of device of the present invention be further described below:
As shown in Figure 1, in smelting furnace 1, utilize 2 heating of heater coil I, melt out hypereutectic high chromium cast iron melt, by thermocouple I 3, measure the temperature of hypereutectic high chromium cast iron, control 1400 ℃ of pouring temperatures; Support I 5 is tilted, make hypereutectic high chromium cast iron melt inject crystallizer 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After hypereutectic high chromium cast iron melt cast enters crystallizer 12, the temperature of surveying according to thermocouple II 17, adjusts heater coil II 8 power, insulation 3min; Then close heater coil II 8, in cooling procedure, electrode 16 and thermocouple II 17 are extend in hypereutectic high chromium cast iron melt, open high-voltage pulse power source 13, hypereutectic high chromium cast iron melt is applied to pulse current, pulse current processing time 14min; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from hypereutectic high chromium cast iron melt, to crystallizer cooling water inlet 11, pass into cooling water, be cooled to room temperature simultaneously.
The hypereutectic high chromium cast iron solidified structure that the present embodiment obtains as shown in Figure 5, with process before tissue (as shown in Figure 2) contrast, solidified structure crystal grain after processing is tiny, even tissue.
Embodiment 4
The device of pulse current thinning metal solidification texture described in the present embodiment, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned at tiltable in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, as shown in Figure 1.
Crystallizer 12 hollows described in the present embodiment, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Described in the present embodiment, high-voltage pulse power source 13 waveforms are many group zigzag impulse waves, and voltage is 1200V, and frequency is 30Hz, and pulsewidth is 30 μ s.
With pulse current refinement Al-25%Si alloy (778 ℃ of liquidus temperatures, 577 ℃ of solidus temperatures) solidified structure, be example, and by reference to the accompanying drawings the use procedure of device of the present invention be further described below:
As shown in Figure 1, in smelting furnace 1, utilize 2 heating of heater coil I, melt out Al-25%Si alloy melt, by thermocouple I 3, measure the temperature of Al-25%Si alloy melt, control 790 ℃ of pouring temperatures; Support I 5 is tilted, make Al-25%Si alloy melt inject crystallizer 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After Al-25%Si alloy melt is poured into crystallizer 12, the temperature of surveying according to thermocouple II 17, adjusts heater coil II 8 power, insulation 2h; Then adjust heater coil II 8 power, control Al-25%Si alloy cooling velocity, in cooling procedure, electrode 16 and thermocouple II 17 are extend in Al-25%Si alloy melt, open high-voltage pulse power source 13, Al-25%Si alloy melt is applied to pulse current, pulse current processing time 3min; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from Al-25%Si alloy melt, to crystallizer cooling water inlet 11, pass into cooling water, be cooled to room temperature simultaneously.
Embodiment 5
The device of pulse current thinning metal solidification texture described in the present embodiment, this device comprises smelting furnace 1, heater coil I 2, thermocouple I 3, support I 5, running channel 6, holding furnace 7, heater coil II 8, support II 9, crystallizer 12, high-voltage pulse power source 13, compensating wire 14, heat insulation asbestos 15, electrode 16, thermocouple II 17, support I 5 is connected with support II 9, for supporting whole device; Smelting furnace 1 is positioned at tiltable in support I 5, and the sidewall of smelting furnace 1 is provided with heat coil 2, and thermocouple I 3 hangs on the top of smelting furnace 1 and stretches into smelting furnace 1 inside; Holding furnace 7 is positioned in support II 9, and the sidewall of holding furnace 7 is provided with heater coil II 8, and the top of holding furnace 7 is coated with heat insulation asbestos 15; Crystallizer 12 is placed in holding furnace 7, and running channel 6 is aimed at crystallizer 12 through heat insulation asbestos 15; Electrode 16 and thermocouple II 17 stretch into crystallizer 12 inside through heat insulation asbestos 15; High-voltage pulse power source 13 is connected with electrode 16 by compensating wire 14, as shown in Figure 1.
Crystallizer 12 hollows described in the present embodiment, the side wall lower ends of crystallizer 12 is provided with crystallizer coolant outlet 10, crystallizer cooling water inlet 11, can control metal bath cooling velocity by being incubated, heating or pass into the means such as cooling water.
Described in the present embodiment, high-voltage pulse power source 13 waveforms are many group zigzag impulse waves, and voltage is 1400V, and frequency is 30Hz, and pulsewidth is 50 μ s.
With pulse current refinement Cu-10%Sn alloy (1021 ℃ of liquidus temperatures, 830 ℃ of solidus temperatures) solidified structure, be example, and by reference to the accompanying drawings the use procedure of device of the present invention be further described below:
As shown in Figure 1, in smelting furnace 1, utilize 2 heating of heater coil I, melt out Cu-10%Sn alloy melt, by thermocouple I 3, measure the temperature of Cu-10%Sn alloy melt, control 1180 ℃ of pouring temperatures; Support I 5 is tilted, make Cu-10%Sn alloy melt inject crystallizer 12 along running channel 6; Before cast starts, first utilize 8 pairs of crystallizers 12 of heater coil II, electrode 16 and the thermocouple II 17 of holding furnace 7 to carry out preheating, thermocouple II 17 measured temperatures are synchronizeed with thermocouple I 3 measured temperatures; After Cu-10%Sn alloy melt is poured into crystallizer 12, the temperature of surveying according to thermocouple II 17, adjusts heater coil II 8 power, insulation 30min; Then adjust heater coil II 8 power and control Cu-10%Sn alloy melt cooling velocity, in cooling procedure, electrode 16 and thermocouple II 17 are extend in Cu-10%Sn alloy melt, open high-voltage pulse power source 13, Cu-10%Sn alloy melt is applied to pulse current, pulse current processing time 3min; After pulse current processing finishes, electrode 16 and thermocouple II 17 are moved up and withdraw from Cu-10%Sn alloy melt, to crystallizer cooling water inlet 11, pass into cooling water, be cooled to room temperature simultaneously.
Claims (5)
1. the device of a pulse current thinning metal solidification texture, it is characterized in that: this device comprises smelting furnace (1), heater coil I (2), thermocouple I (3), support I (5), running channel (6), holding furnace (7), heater coil II (8), support II (9), crystallizer (12), high-voltage pulse power source (13), compensating wire (14), heat insulation asbestos (15), electrode (16), thermocouple II (17), support I (5) is connected with support II (9), for supporting whole device; It is upper that smelting furnace (1) is positioned at support I (5), and the sidewall of smelting furnace (1) is provided with heat coil (2), and thermocouple I (3) hangs on the top of smelting furnace (1) and stretches into smelting furnace (1) inside; It is upper that holding furnace (7) is positioned at support II (9), and the sidewall of holding furnace (7) is provided with heater coil II (8), and the top of holding furnace (7) is coated with heat insulation asbestos (15); Crystallizer (12) is placed in holding furnace (7), and running channel (6) is aimed at crystallizer (12) through heat insulation asbestos (15); Electrode (16) and thermocouple II (17) stretch into crystallizer (12) inside through heat insulation asbestos (15); High-voltage pulse power source (13) is connected with electrode (16) by compensating wire (14).
2. the device of pulse current thinning metal solidification texture according to claim 1, is characterized in that:
Smelting furnace (1) is placed in the upper tiltable of support I (5).
3. the device of pulse current thinning metal solidification texture according to claim 1, is characterized in that: described crystallizer (12) hollow, the side wall lower ends of crystallizer (12) is provided with crystallizer coolant outlet (10), crystallizer cooling water inlet (11).
4. pulse current thinning metal solidification texture device according to claim 1, is characterized in that: described electrode (16) and thermocouple II (17) stretch into crystallizer (12) through heat insulation asbestos (15), can move up and down.
5. the device of pulse current thinning metal solidification texture according to claim 1, is characterized in that: described high-voltage pulse power source (13) waveform is many group zigzag impulse waves.
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Cited By (4)
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| CN105220225A (en) * | 2015-10-27 | 2016-01-06 | 辽宁工业大学 | The method of Metallic Solids growth in a kind of Electric Pulse Treatment technical controlling directional freeze process |
| CN106424668A (en) * | 2016-09-13 | 2017-02-22 | 昆明理工大学 | Method for improving corrosion resistance of cast iron casting |
| 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 |
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
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| CN106424668A (en) * | 2016-09-13 | 2017-02-22 | 昆明理工大学 | Method for improving corrosion resistance of cast iron casting |
| 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 |
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
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