CN101122441A - Short cold crucible for continuous melting and directional solidification flat blank - Google Patents
Short cold crucible for continuous melting and directional solidification flat blank Download PDFInfo
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- CN101122441A CN101122441A CNA2007101443083A CN200710144308A CN101122441A CN 101122441 A CN101122441 A CN 101122441A CN A2007101443083 A CNA2007101443083 A CN A2007101443083A CN 200710144308 A CN200710144308 A CN 200710144308A CN 101122441 A CN101122441 A CN 101122441A
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- crucible
- main body
- red copper
- directional solidification
- copper crucible
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
A short cooling crucible used for billet continuous melting and directional solidification relates to a cooling crucible. The invention solves the problems of a present electromagnetic cooling crucible, including adhesion between a melt and an inner wall of the crucible, discontinuous melt melting, poor melt melting, uneven composition, low power utilization and inconvenient observation. The cross section of a red copper crucible main body (1) mentioned by the invention is a flat annular hollow cavity. The upper half body (2) is segmented into eight columns (7), of which the cross sections are petal shape. Vertical deep holes are arranged on the bottom face of the lower half body (3), corresponding to the position of the columns (7) with petal-shaped cross sections. Clearances (8) are arranged between every two adjacent columns (7) with petal-shaped cross sections. The clearances (8) are filed with insulating seal material layers (12). The invention makes the low cost melting and forming with high purified materials realized. Metals float in a water cooling copper crucible and are in soft contact with the inner wall of the crucible. The strong stirring of the electromagnetic power makes the melt components even.
Description
Technical field:
The present invention relates to a kind of cold crucible.
Background technology:
Cold crucible is the crucible made from the fine copper with water-cooled, because crucible is a water-cooling structure, in use crucible temperature is very low, so crucible itself does not almost pollute the material in the crucible.Difference according to the crucible mode of heating, can be divided into external-heat crucible that does not crack and the induction heating type crucible that cracks, the external-heat cold crucible is the energy molten material that relies on power generator to produce, induction melting cold crucible then relies on the electromagnetic induction heating molten material, being called electromagnetic cold crucible again, is present widely used cold crucible.Electromagnetic Cold Crucible Technology is the new technology of rising in recent years, it is that water jacketed copper crucible with distinguish places in the alternating electromagnetic field, utilize alternating electromagnetic field generated eddy current heat fusing metal, and rely on electromagnetic force to make metal bath and sidewall of crucible keep soft to contact or contactless state, and the technology of furnace charge being carried out induction melting or shaping, in nineteen ninety the 6th iron and steel meeting holding of Japan Nagoya, the cold crucible melting technique is subjected to the attention of various countries, and this new technology is all being done all one can to research and develop by each developed country at present.The problem that existing electromagnetic cold crucible exists melt and crucible inwall to paste and connects, the melt fusing is discontinuous, melt lack of fusion, uneven components, utilization rate of electrical are low, be inconvenient to observe.
Summary of the invention:
The problem that the present invention exists melt and crucible inwall to paste to connect in order to solve existing electromagnetic cold crucible, the melt fusing is discontinuous, melt lack of fusion, uneven components, utilization rate of electrical are low, be inconvenient to observe, and then a kind of continuous melting and directional solidification flat blank short cold crucible is provided.
Technical scheme of the present invention is: continuous melting and directional solidification flat blank comprise water inlet pipe, outlet pipe, several thin conduits, red copper crucible main body, induction coil with the short cold crucible, water inlet pipe is communicated with the red copper crucible main body by several thin conduits, outlet pipe is communicated with the red copper crucible main body by several thin conduits, and described induction coil is enclosed within on the upper semi-body of red copper crucible main body; The cross section of described red copper crucible main body is the cavity body of flat ring-type, the red copper crucible main body is made up of upper semi-body and lower semi-body, upper semi-body and lower semi-body are one, it is petal-like cylinder that described upper semi-body is divided into eight cross sections, eight cross sections are that petal-like cylinder is along X-axis on the red copper crucible body cross-section and Y-axis symmetry, be that petal-like cylinder correspondence position has vertical deep hole with cross section on the bottom surface of lower semi-body, have cross through hole on the two sides, front and back of lower semi-body, described vertical deep hole is communicated with respectively with cross through hole, every adjacent two cross sections are to leave the gap between the petal-like cylinder, are filled with the insulated enclosure material layer in the described gap.
The present invention has following beneficial effect: 1, the present invention has made full use of the fuel factor and the stress effect of electromagnetic field and metal interaction.Because smelting metal contacts with sidewall of crucible, make the melt that contacts with crucible form the skim scull, inner melt then melts in this scull, so can keep the high-purity of virgin metal and prevent the pollution of various interstitial elements in melting or forming process, realize the low-cost melting and the moulding of high-purity material; Metal suspends in water jacketed copper crucible or contacts with the crucible inwall is soft.2, owing to adopt eddy-current heating, it can melt high-melting point metal.3, it is even that the strong agitation of electromagnetic force makes the melt structural constituent.4, applied widely, alloy and material that can the melting heterogeneity.5, owing to the cold wall of cold crucible, high-temperature fusant does not have substantive corrosion, long service life to cold crucible.6, crucible distinguish number is reasonable, has good saturating magnetic and low eddy-current loss characteristic, produces big inductive loop and suspending power in melt, thereby makes the effect of cold crucible reach best.7, compare with existing cold crucible, the present invention can directly observe hump and melt color, in time regulates the feeding rod speed, accurately to prepare the slab of required tissue; Can eliminate simultaneously the phenomenon that causes lack of fusion because of feeding rod subsides sidewall of crucible with preceding; The direct heat effect of induction coil reduces the energy consumption of crucible self, improves the power utilization efficient of crucible.Have efficient, be easy to observe and the advantage of control, process stabilization, all significant for reducing cost, boosting productivity.8, the cold crucible oneself height is lower, induction coil is parallel with the upper surface of crucible or exceed upper surface slightly, in experimentation, can directly observe hump pattern, position and melt color like this, whether cooperate with the judgment experiment parameter reasonable, to obtain best experiment effect, this crucible is little, highly low owing to own vol simultaneously, so power utilization efficient is higher.The present invention is applied in to make in the body of heater of Accurate Shaping and device for directionally solidifying and is used for realizing continuous melting and directional solidification.
Description of drawings:
Fig. 1 is a front view of the present invention, and Fig. 2 is the vertical view of Fig. 1, and Fig. 3 is the A-A cutaway view of Fig. 1, and Fig. 4 is the I portion enlarged drawing of Fig. 3.
The specific embodiment:
The specific embodiment one: as Fig. 1～shown in Figure 3, described continuous melting of present embodiment and directional solidification flat blank are made up of water inlet pipe 4, outlet pipe 5, several thin conduits 6, red copper crucible main body 1, induction coil 13 with the short cold crucible, water inlet pipe 4 is communicated with red copper crucible main body 1 by several thin conduits 6, outlet pipe 5 is communicated with red copper crucible main body 1 by several thin conduits 6, and described induction coil 13 is enclosed within on the upper semi-body 2 of red copper crucible main body 1; The cross section of described red copper crucible main body 1 is the cavity body of flat ring-type, red copper crucible main body 1 is made up of upper semi-body 2 and lower semi-body 3, upper semi-body 2 is an one with lower semi-body 3, it is petal-like cylinder 7 that described upper semi-body 2 is divided into eight cross sections, eight cross sections are that petal-like cylinder 7 is along X-axis on red copper crucible main body 1 cross section and Y-axis symmetry, be that petal-like cylinder 7 correspondence positions have vertical deep hole 9 with cross section on the bottom surface of lower semi-body 3, have cross through hole 10 on the two sides, front and back of lower semi-body 3, described vertical deep hole 9 is communicated with respectively with cross through hole 10, every adjacent two cross sections are to leave gap 8 between the petal-like cylinder 7, are filled with insulated enclosure material layer 12 in the described gap 8.
According to the copper billet shape, can select the copper pipe coiling 4 circle induction coils of 8mm for use, induction coil two is connected the last plane of induction coil and the last plane parallel of crucible or slightly high 3mm with the through hole nut with power electrode screw on the body of heater.Cold crucible and induction coil coupling, because the induction coil upper surface is parallel with the crucible upper surface or it is high to omit, crucible bottom pull rod gos deep into 35～40mm in the crucible, feeding rod bottom is mutually neat with induction coil top; When induction coil feeds alternating current, induction coil can directly be responded to the feeding rod, and crucible all has the induction heat effect to feeding rod and pull rod, and feeding rod and pull rod all melt the formation hump, move downward with friction speed, can continuous melting and directionally solidifying titanium aluminum alloy slab.
The specific embodiment two: the described insulated enclosure material layer 12 of present embodiment is made up of natural mica sheet and epoxy resin.Select such material for use, the sealed insulation best results.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: as Fig. 1～shown in Figure 3, lower semi-body 3 welding of the described thin conduit 6 of present embodiment and water inlet pipe 4, thin conduit 6 and outlet pipe 5 and thin conduit 6 and red copper crucible main body 1.Adopt welding, can bear the pressure of 10 atmosphere at least.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment four: as shown in figures 1 and 3, length=L * W * H=70～80 * 40～50 * 50～60mm of the described red copper crucible main body 1 of present embodiment.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment five: as shown in figures 1 and 3, the length=L * W * H=72 * 44 * 55mm of the described red copper crucible main body 1 of present embodiment.Adopt such size, experiment effect the best.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment six: as shown in Figure 4, length x width=a * b=2.5～4 * 0.4～0.6mm in the described gap 8 of present embodiment.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment seven: as shown in Figure 4, the length x width=a * b=3 * 0.5mm in the described gap 8 of present embodiment.Adopt such size, be convenient to sealing.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment eight: as shown in Figure 3, present embodiment also comprises insulating tape 11, and described insulating tape 11 is wrapped on the outer surface of red copper crucible main body 1, scribbles one deck epoxy resin on the outer surface of insulating tape 11.Adopt such structure, prevent red copper crucible main body 1 and induction coil 13 conductions.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment nine: the outer surface of the described insulating tape 11 of present embodiment is provided with epoxy resin layer.Adopt such structure, insulation effect is good.Other composition is identical with the specific embodiment eight with annexation.
Operation principle: according to the difference of occupation mode, cold crucible can be divided into two kinds of batch (-type) and continuous casting formulas, and its basic principle is the same, and primary structure is similar, and it mainly is made up of cold-crucible, power supply and other auxiliary equipment.Cold-crucible is made up of several arc pieces or pipe, is connected with cooling water in arc piece or the pipe, keeps cold wall, filling refractory material in slit between each arc piece or pipe, and crucible is around with water-cooled induction coil, and induction coil links to each other with power supply, to produce alternating electromagnetic field.
When coil feeds alternating current, produce an alternating electromagnetic field.Insulated from each other between the per minute lobe of cold crucible, so all produce induced-current in every lobe.When the immediate current I of induction coil is counter clockwise direction, then in the cross section of every lobe, produce clockwise induced current I ' simultaneously, the sense of current is then opposite on the cross section of adjacent two lobes, and the magnetic direction of setting up between lobe each other is identical, outwards shows as the magnetic field enhancement effect.Therefore each place, slit of cold crucible all is a high-intensity magnetic field, and cold crucible is as the high current device, and the magnetic line of force is gathered on the material in the crucible, and the material in the crucible is just cut by the magnetic line of force of this alternating magnetic fields.According to Theory of Electromagnetic Field, just produce induced electromotive force in the material in the crucible, because the existence of induced electromotive force will form the current loop that seals in the bath surface thin layer of material.This electric current is called eddy current, the big or small I of eddy current
iObey Ohm's law.Because the eddy current resistance in circuit is very little usually, so I
iCan reach very high value, make the eddy current loop produce a large amount of heat, thereby make metal molten, its heat can be by Q=I
i 2Rt determines.Therefore in the cold crucible melt being carried out heating mainly is to rely on induced-current.
By Theory of Electromagnetic Field as can be known: electromagnetic force f=1/2Re (J * B) (electromagnetic force vector)
Here, electromagnetic force f can be decomposed into the irrotationality component F that causes melt to suspend
mWith make that melt produces the electromagnetic agitation driving force the component F of revolving s arranged:
f
m＝Re[-B
2/4μ]
F
s＝Re[(B×)B]/2μ
f
mAction principle is: in the surface of metal bath, the formed magnetic field B of induction coil is along the generatrix direction (being bath surface direction in the profile) of melt, and the direction of melt induced-current j is the ring Zhou Fangxiang in melt level cross section, then as can be known by f=J * B, electromagnetic force f direction is the inter normal direction (as Fig. 4) of bath surface, thereby electromagnetic force can be offset by the gravity or the static pressure of molten metal the suspension or the soft contact of the molten metal of realization quilt.
Fs is the electromagnetic agitation driving force, and metal bath is produced strong stirring action, makes the temperature of metal bath and composition even, and can obtain the consistent degree of superheat.f
mDetermined than by the power supply field frequency that with Fs quantity between the two when supply frequency is low more, then mixing power is big more; Otherwise frequency is high more, and suspending power is big more.
Claims (7)
1. continuous melting and directional solidification flat blank short cold crucible, it comprises water inlet pipe (4), outlet pipe (5), several thin conduits (6), red copper crucible main body (1), induction coil (13), water inlet pipe (4) is communicated with red copper crucible main body (1) by several thin conduits (6), outlet pipe (5) is communicated with red copper crucible main body (1) by several thin conduits (6), and described induction coil (13) is enclosed within on the upper semi-body (2) of red copper crucible main body (1); The cross section that it is characterized in that described red copper crucible main body (1) is the cavity body of flat ring-type, red copper crucible main body (1) is made up of upper semi-body (2) and lower semi-body (3), upper semi-body (2) is an one with lower semi-body (3), it is petal-like cylinder (7) that described upper semi-body (2) is divided into eight cross sections, eight cross sections are that petal-like cylinder (7) is along X-axis and Y-axis symmetry on red copper crucible main body (1) cross section, be that petal-like cylinder (7) correspondence position has vertical deep hole (9) with cross section on the bottom surface of lower semi-body (3), have cross through hole (10) on the two sides, front and back of lower semi-body (3), described vertical deep hole (9) is communicated with respectively with cross through hole (10), every adjacent two cross sections are to leave gap (8) between the petal-like cylinder (7), are filled with insulated enclosure material layer (12) in described gap (8).
2. continuous melting according to claim 1 and directional solidification flat blank short cold crucible is characterized in that described insulated enclosure material layer (12) is made up of natural mica sheet and epoxy resin.
3. continuous melting according to claim 1 and directional solidification flat blank short cold crucible is characterized in that described thin conduit (6) and water inlet pipe (4), thin conduit (6) weld with the lower semi-body (3) of outlet pipe (5) and thin conduit (6) and red copper crucible main body (1).
4. continuous melting according to claim 1 and directional solidification flat blank short cold crucible is characterized in that length=L * W * H=70～80 * 40～50 * 50～60mm of described red copper crucible main body (1).
5. continuous melting according to claim 1 and directional solidification flat blank short cold crucible is characterized in that length x width=a * b=2.5～4 * 0.4～0.6mm of described gap (8).
6. continuous melting according to claim 1 and directional solidification flat blank short cold crucible is characterized in that it also comprises insulating tape (11), and described insulating tape (11) is wrapped on the outer surface of red copper crucible main body (1).
7. continuous melting according to claim 6 and directional solidification flat blank short cold crucible is characterized in that the outer surface of described insulating tape (11) is provided with epoxy resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101443083A CN101122441B (en) | 2007-09-14 | 2007-09-14 | Short cold crucible for continuous melting and directional solidification flat blank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101443083A CN101122441B (en) | 2007-09-14 | 2007-09-14 | Short cold crucible for continuous melting and directional solidification flat blank |
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| Publication Number | Publication Date |
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| CN101122441A true CN101122441A (en) | 2008-02-13 |
| CN101122441B CN101122441B (en) | 2010-06-23 |
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| CN2007101443083A Expired - Fee Related CN101122441B (en) | 2007-09-14 | 2007-09-14 | Short cold crucible for continuous melting and directional solidification flat blank |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108548A (en) * | 2010-12-28 | 2011-06-29 | 哈尔滨工业大学 | Square electromagnetic cold crucible for continuous melting and organizational control of polycrystalline silicon |
| CN102874815A (en) * | 2012-10-18 | 2013-01-16 | 包头市山晟新能源有限责任公司 | Cold crucible treating method |
| CN101636015B (en) * | 2008-07-25 | 2013-01-16 | 西北工业大学 | High temperature gradient low melt flow electromagnetic induction heating device |
| CN107677126A (en) * | 2017-10-31 | 2018-02-09 | 百色学院 | A kind of electromagnetic suspension water jacketed copper crucible |
| CN109963668A (en) * | 2017-01-17 | 2019-07-02 | Ald真空技术有限公司 | Casting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4738713A (en) * | 1986-12-04 | 1988-04-19 | The Duriron Company, Inc. | Method for induction melting reactive metals and alloys |
| DE3910777C2 (en) * | 1989-04-04 | 2001-08-09 | Ald Vacuum Techn Ag | Induction furnace with a metal crucible |
| JP3047056B2 (en) * | 1992-06-02 | 2000-05-29 | 科学技術庁金属材料技術研究所長 | Floating melting apparatus and its operation method |
| CN1136428C (en) * | 2000-03-16 | 2004-01-28 | 冶金工业部钢铁研究总院 | Water-cooled suspension smelting crucible |
| CN100368121C (en) * | 2005-09-02 | 2008-02-13 | 哈尔滨工业大学 | Directional freeze method for TiAl-based alloy plate |
| CN1320972C (en) * | 2005-09-02 | 2007-06-13 | 哈尔滨工业大学 | Rectangular cold crucible system suitable for continuous fusion casting directional freeze |
-
2007
- 2007-09-14 CN CN2007101443083A patent/CN101122441B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636015B (en) * | 2008-07-25 | 2013-01-16 | 西北工业大学 | High temperature gradient low melt flow electromagnetic induction heating device |
| CN102108548A (en) * | 2010-12-28 | 2011-06-29 | 哈尔滨工业大学 | Square electromagnetic cold crucible for continuous melting and organizational control of polycrystalline silicon |
| CN102874815A (en) * | 2012-10-18 | 2013-01-16 | 包头市山晟新能源有限责任公司 | Cold crucible treating method |
| CN102874815B (en) * | 2012-10-18 | 2015-02-04 | 包头市山晟新能源有限责任公司 | Cold crucible treating method |
| CN109963668A (en) * | 2017-01-17 | 2019-07-02 | Ald真空技术有限公司 | Casting method |
| CN109963668B (en) * | 2017-01-17 | 2022-04-19 | Ald真空技术有限公司 | Casting method |
| CN107677126A (en) * | 2017-10-31 | 2018-02-09 | 百色学院 | A kind of electromagnetic suspension water jacketed copper crucible |
| CN107677126B (en) * | 2017-10-31 | 2023-09-19 | 百色学院 | Electromagnetic suspension water-cooled copper crucible |
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| CN101122441B (en) | 2010-06-23 |
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Granted publication date: 20100623 Termination date: 20100914 |