CN1757463A - Method and apparatus for fining metal solidified organs by using magneto-oscillation - Google Patents
Method and apparatus for fining metal solidified organs by using magneto-oscillation Download PDFInfo
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- CN1757463A CN1757463A CN 200510030736 CN200510030736A CN1757463A CN 1757463 A CN1757463 A CN 1757463A CN 200510030736 CN200510030736 CN 200510030736 CN 200510030736 A CN200510030736 A CN 200510030736A CN 1757463 A CN1757463 A CN 1757463A
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Abstract
A magneto-oscillating method for fining the solidified metallic structure features that an oscillation generator consisting of the specially designed circuit and coil and an UHF pulse magnetic field are used to generate the mageneto-oscillation on the surface of molten metal. Its apparatus is composed of high-voltage pulse power supply, sandy container of molten metal, temp acquiring and recording system, and the coil and conductor for magneto-oscillation, said high-voltage pulse power supply comprises charging system, high-voltage pulse capacitor and HF switch.
Description
Technical field
The present invention relates to a kind of method and device thereof of fining metal solidified organs by using magneto-oscillation, belong to metal material Modification Treatment Technique field.
Background technology
The metal solidification texture refinement helps improving the combination property of metal, and at the refinement of solidified structure, method commonly used is breed, go bad processing, microalloying or employing physical agitation etc.Along with the continuous development of solidification technology, many emerging solidified structure control technologies are arisen at the historic moment, and the highly significant that influences to metal solidification texture and solid-state phase changes is handled in its centre field, has obtained remarkable progress.The outfield is under the energy-saving material-saving condition, reduces the pollution to environment and material itself.
In handle in current outfield, mainly contain power supply, magnetic field, vibration and microgravity and super gravity field etc., and electric current and magnetic field can be divided into non-pulse field and pulsed field, vibration also can be divided into ultrasonic wave and mechanical oscillation.These outer field energys are improved metal solidification texture to some extent, and just its mechanism of action has nothing in common with each other.As: when metal bath being handled with pulse current and pulsed magnetic field, though the mode of action of pulse current mainly is to allow pulse current be undertaken by metal bath, and the mode of action of pulsed magnetic field mainly is to allow pulse current produce the magnetic field effect by the outer field coil of metal bath, but because the electromagnetic induction effect pulse current can produce induced field simultaneously in metal bath.Same pulsed magnetic field also can produce induced-current simultaneously in metal bath, though therefore pulse current and pulsed magnetic field are distinguished to some extent from original processing mode, but see it is very similar from last being used for, thereby their mechanism of action can be analyzed equally all from aspects such as electric current, magnetic fields.
For another example: when metal bath being handled with power ultrasonic, we obtained ultrasonic wave at both available traditional method, also can in ultrastrong magnetic field, add the superaudio induced-current, obtain non-contact type ultrasonic thereby make the metal bath surface produce ultrasonic vibration by its interaction.When using the conventional ultrasonic wave production method to import metal bath, influence each other because of tool heads causes with contacting of metal bath, unfavorable its handled the higher metal bath of fusing point.Though the problem that non-contact type ultrasonic does not have conventional ultrasonic wave to produce because of contact, it is handled with conventional ultrasonic wave metal bath and obviously is not both it has increased ultrastrong magnetic field again in metal bath effect to what metal bath was handled.Therefore the non-contact type ultrasonic that produces by ultrastrong magnetic field is exactly result by power ultrasonic and the shared effect of ultrastrong magnetic field to the effect of metal bath.
In pulse current (or claim electric pulse) solidifying fine crystal technology, directly by metal bath, this not only influences production safety to electric current, and can make the metal surface produce surging when electric current is big even splash, and causes the continuous cast mold inner metal liquid to roll up slag.In pulsed magnetic field solidifying fine crystal technology, though electric current is not directly by metal bath, after high-intensity magnetic field is applied to metal bath, can produce induced-current at metal bath, when magnetic field intensity was big, high-intensity magnetic field also can make the metal surface produce surging even splash, and caused molten metal volume slag.
Summary of the invention
The method and the isolated plant thereof that the purpose of this invention is to provide a kind of fining metal solidified organs by using magneto-oscillation.
The technology of fining metal solidified organs by using magneto-oscillation is different from the technology of pulsed magnetic field and pulse current thinning metal solidification texture.The technology of fining metal solidified organs by using magneto-oscillation also is different from the technology of ultrasonic wave thinning solidification structure, and the former need not to be provided with the luffing bar that contacts with liquid metal.Compare with the thin crystal technique of electromagnetic induction ultrasonic coagulation, need not to inner heavy current and the high-intensity magnetic field of importing of metal bath.
The method of fining metal solidified organs by using magneto-oscillation among the present invention, the oscillation generator that circuit and working coil by particular design constitutes, import the hyperfrequency pulsed magnetic field, on metal bath surface but not whole melt produces the mangneto vibration, metal solidification process generation effect until solidifying, is improved metal solidification texture and makes its refinement; The method is characterized in that: processed metal bath produces vibration on the surface under the mangneto oscillation generator effect of particular design; As the feed power supply, this high-voltage pulse power source is made of charging system, high-voltage pulse electric capacity, HF switch, individual layer discharge coil oscillation generator by a high-voltage pulse power source; By the control of HF switch, make the metal freezing bath surface produce the higher strong electromagnetic pulse vibration of frequency, under certain oscillation intensity, change the metal solidification texture form, crystal grain thinning; Employed pulse power parameter is: output voltage U=75～4000V, pulse width 70～121 μ s, practical function frequency f=0.017～2Hz.
A kind of isolated plant that the method for fining metal solidified organs by using magneto-oscillation of the present invention is used is characterized in that this device includes high-voltage pulse power source, holds sand mold container, temperature acquisition register system, mangneto vibration single layer coil and the conductor of molten metal; High-voltage pulse power source is made of charging system, high-voltage pulse electric capacity, HF switch; High-voltage pulse electric capacity is connected by the outer single layer coil of lead and sand mold container by HF switch, and high-voltage pulse electric capacity is discharged to single layer coil, produces impulse magnetic field between metal bath and discharge coil; The sand mold container that fills metal bath is arranged at the center of the mangneto vibration single layer coil of ring-type, and the one side is provided with high-voltage pulse power source, and opposite side is provided with the temperature acquisition register system device of automation.
The operation principle of the inventive method is as described below:
When the metal bath in the sand mold container was in the process of setting, the high-voltage pulse electric capacity in the high-voltage pulse power source discharged to the ring-type single layer coil that is arranged at outside the sand mold container by lead under the control of HF switch; Produce the extremely narrow impulse magnetic field of pulsewidth between metal bath and discharge coil, make the metal bath surface produce induced-current, induced-current and impulse magnetic field interact and make the solidified melt surface produce the extremely narrow forced oscillation of pulsewidth.Under this fast-changing burst pulse effect, the induced electricity generation Kelvin effect that fails to be convened for lack of a quorum only concentrates on the metal bath surface, and induced-current also can shield pulsed magnetic field simultaneously, so metal bath inside had not both had electric current not have the effect in magnetic field yet.But on the metal bath surface, induced-current and magnetic field interaction make the metal bath surface be subjected to inside pressure, and to internal communication, and when running into opposite surperficial, compressional wave just is reflected, and becomes the relaxation ripple, will produce the mangneto vibration like this in the metal bath.Because frequency of oscillation is a supersonic frequency, when oscillation intensity is very big, even may form cavitation bubble.By the control of HF switch, can produce the higher mangneto impulse hunting of repetitive rate simultaneously.Exercising result can significantly change the solidified structure form, the refinement texture of coarse crystal, and eliminate gravity segregation.
The advantage of the inventive method is as follows:
(1) the present invention is new outfield treatment technology, though its method that produces vibration is to produce pulsed magnetic field action in bath surface by capacitor discharge, melt inside had not both had magnetic field not have electric current yet;
(2) the contactless vibration that the inventive method produced has solved contact ultrasonic and has imported the pollution problem that is run in the high-temperature metal liquation, same the inventive method need not to inner heavy current and the high-intensity magnetic field of importing of metal bath, and this has just reduced the obstacle of industrial applications.
Description of drawings
Fig. 1 is the rough schematic of fining metal solidified organs by using magneto-oscillation method isolated plant of the present invention.
Fig. 2 is the ball bearing made using figure of Fig. 1 mesohigh pulse power.
Fig. 3 is the microphoto of the pure Al solidified structure of undressed metal.
Fig. 4 be the pure Al solidified structure of the metal after the mangneto oscillation treatment microphoto (U=1775V, f=1.2Hz).
The specific embodiment
After now embodiments of the invention being described in.
Embodiment 1
Referring to Fig. 1, used a kind of isolated plant in the fining metal solidified organs by using magneto-oscillation method of the present invention includes high-voltage pulse power source 1, holds sand mold container 2, temperature acquisition register system 3, mangneto vibration single layer coil 4 and the conductor 5 of molten metal; Referring to Fig. 2, high-voltage pulse power source 1 is made of charging system 6, high-voltage pulse electric capacity 7, HF switch 8; High-voltage pulse electric capacity 7 is connected with sand mold container 2 single layer coil 4 outward by lead 5 by HF switch 8, makes 4 discharges of 7 pairs of single layer coils of high-voltage pulse electric capacity, produces impulse magnetic field between metal bath and discharge coil; The sand mold container that metal bath is housed is arranged at the center of the mangneto vibration single layer coil of ring-type, and the one side is provided with high-voltage pulse power source 1, and opposite side is provided with the temperature acquisition register system device 3 of automation.
Employed pulse power parameter is: output voltage U=75～4000V, pulse width 70～121 μ s, practical function frequency f=0.017～2Hz.
Utilize the inventive method and isolated plant thereof, to the experiment that the pure Al of metal is done, its test situation and result are described below:
With industrial purity is that 99.99% No. 0 fine aluminium is positioned in the resistance furnace and melts, and insulation is 10 minutes when 800 ℃ of temperature, injects from the sand mold container top then; The specification of sand mold is φ 50 * 150mm; Open oscillation generating circuit simultaneously, the generation frequency is that 1.2Hz, voltage are the mangneto vibration of 1775V, it is executed melt shake, and solidifies fully until the metallic aluminium melt.
Detect through electron microscope, can find that most solidified structures are the equiax crystal of even refinement in the simple metal aluminium ingot after mangneto vibrates.
Referring to Fig. 3 and Fig. 4, visible untreated pure aluminum metal solidified structure and the pure aluminum metal solidified structure after the mangneto oscillation treatment have tangible difference, and the latter has the fine crystals that is evenly distributed in a large number.
Claims (2)
1. the method for a fining metal solidified organs by using magneto-oscillation, the oscillation generator that circuit and working coil by particular design constitutes, import the hyperfrequency pulsed magnetic field, on metal bath surface but not whole melt produces the mangneto vibration, metal solidification process generation effect until solidifying, is improved metal solidification texture and makes its refinement; The method is characterized in that: processed metal bath produces vibration on the surface under the mangneto oscillation generator effect of particular design; As the feed power supply, this high-voltage pulse power source is made of charging system, high-voltage pulse electric capacity, HF switch, individual layer discharge coil oscillation generator by a high-voltage pulse power source; By the control of HF switch, make the metal freezing bath surface produce the higher strong electromagnetic pulse vibration of frequency, under certain oscillation intensity, change the metal solidification texture form, crystal grain thinning; Employed pulse power parameter is: output voltage U=75～4000V, pulse width 70～121 μ s, practical function frequency f=0.017～2Hz.
2. the used a kind of isolated plant of the method for fining metal solidified organs by using magneto-oscillation as claimed in claim 1 is characterized in that this device includes high-voltage pulse power source 1, holds sand mold container 2, temperature acquisition register system 3, mangneto vibration single layer coil 4 and the conductor 5 of molten metal; High-voltage pulse power source 1 is made of charging system 6, high-voltage pulse electric capacity 7, HF switch 8; High-voltage pulse electric capacity 7 is connected with sand mold container 2 single layer coil 4 outward by lead 5 by HF switch 8, makes 4 discharges of 7 pairs of single layer coils of high-voltage pulse electric capacity, produces impulse magnetic field between metal bath and discharge coil; The sand mold container that fills metal bath is arranged at the center of the mangneto vibration single layer coil of ring-type, and the one side is provided with high-voltage pulse power source 1, and opposite side is provided with the temperature acquisition register system device 3 of automation.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920333A (en) * | 2010-05-06 | 2010-12-22 | 上海大学 | Pulse magneto liquid level vibration method for thinning metal solidification texture |
| CN103949631A (en) * | 2014-04-14 | 2014-07-30 | 上海大学 | Device for measuring temperature of melt in pulse current liquid level disturbance fine grain solidification process |
| CN104439197A (en) * | 2014-12-01 | 2015-03-25 | 宜昌船舶柴油机有限公司 | Large and thick nodular cast iron electromagnetic oscillation device and method |
| CN105964988A (en) * | 2016-03-19 | 2016-09-28 | 上海大学 | Method for refining metal solidification structure through mobile pulse magneto oscillation |
| CN108971460A (en) * | 2018-08-22 | 2018-12-11 | 上海大学 | A kind of method and device of pulse-couple electromagnetic field thinning metal solidification texture |
| CN109773165A (en) * | 2019-01-09 | 2019-05-21 | 上海大学 | Pulse magneto oscillation melting and heat treatment prepare the integrated melting casting device of magnetic refrigeration bulk |
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| CN103586442B (en) * | 2013-11-20 | 2015-08-12 | 上海大学 | The device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1575888A (en) * | 2003-05-27 | 2005-02-09 | 上海大学 | Treatment method for improving iron casting frozen tissue |
| CN1560314A (en) * | 2004-03-10 | 2005-01-05 | 上海大学 | Technology method for fining aluminium crystal particle of use in industry |
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2005
- 2005-10-27 CN CNB2005100307364A patent/CN1319682C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920333A (en) * | 2010-05-06 | 2010-12-22 | 上海大学 | Pulse magneto liquid level vibration method for thinning metal solidification texture |
| CN103949631A (en) * | 2014-04-14 | 2014-07-30 | 上海大学 | Device for measuring temperature of melt in pulse current liquid level disturbance fine grain solidification process |
| CN104439197A (en) * | 2014-12-01 | 2015-03-25 | 宜昌船舶柴油机有限公司 | Large and thick nodular cast iron electromagnetic oscillation device and method |
| CN105964988A (en) * | 2016-03-19 | 2016-09-28 | 上海大学 | Method for refining metal solidification structure through mobile pulse magneto oscillation |
| CN105964988B (en) * | 2016-03-19 | 2019-04-02 | 上海大学 | Mobile model pulse magneto vibrates thinning metal solidification texture method |
| CN108971460A (en) * | 2018-08-22 | 2018-12-11 | 上海大学 | A kind of method and device of pulse-couple electromagnetic field thinning metal solidification texture |
| CN109773165A (en) * | 2019-01-09 | 2019-05-21 | 上海大学 | Pulse magneto oscillation melting and heat treatment prepare the integrated melting casting device of magnetic refrigeration bulk |
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