CN103586442A - Device capable of continuously measuring temperature of metal melt in pulse magnetic oscillation processing technology - Google Patents
Device capable of continuously measuring temperature of metal melt in pulse magnetic oscillation processing technology Download PDFInfo
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- CN103586442A CN103586442A CN201310585998.1A CN201310585998A CN103586442A CN 103586442 A CN103586442 A CN 103586442A CN 201310585998 A CN201310585998 A CN 201310585998A CN 103586442 A CN103586442 A CN 103586442A
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Abstract
The invention discloses a device capable of continuously measuring the temperature of metal melt in a pulse magnetic oscillation processing technology. The device comprises a temperature measurement and analysis system, a casting device and a pulse magnetic oscillation processing device. The casting device comprises a cast molding device, a medium-frequency induction power supply and an induction coil. The metal melt is contained in an inner cavity of the cast molding device. A head cover is arranged at an upper opening of the cast molding device and forms a thermocouple fixing device. The induction coil is controlled by the medium-frequency induction power supply through a switch device to generate a pulsed magnet field, makes solid metal contained in the cast molding device induce eddy currents, and enables the solid metal to emit heat and melt. The pulse magnetic oscillation processing device comprises a pulsed power supply and an electromagnetic coil, wherein the electromagnetic coil is controlled by the pulsed power supply to exert a pulse magnetic oscillation effect on the metal melt, and temperature information of the metal melt is recorded continuously through a temperature collecting and recording system. By means of the device, a temperature curve inside the metal melt subjected to pulse magnetic oscillation processing can be obtained through accurate measurement, the measurement device is easy and convenient to use, and measured data are accurate and reliable.
Description
Technical field
The present invention relates to a kind of temperature survey and analytical equipment, particularly relate to a kind of continuous thermometering device of metal bath, be applied to metal material founding technical field.
Background technology
Owing to controlling the solidified structure of metal material, it is the important means of improving material property, thereby this field becomes domestic and international material science worker's the focus of attention, particularly thinning metal solidification texture is conducive to improve the combination property of metal, and the method for thinning metal solidification texture mainly contains breed, go bad processing, microalloying and the processing of employing outfield etc.The highly significant that affects on metal solidification texture and solid-state phase changes is processed in its centre field, and the research of this respect has obtained huge progress.
Process in the technology of metal solidification texture in existing outfield, Chinese patent 200510030736.4 discloses a kind of " method and the device thereof of pulse magneto vibration thinning metal solidification texture ", the oscillation generator that circuit and the spring shape induction coil of this inventive method by particular design forms, import hyperfrequency pulsed magnetic field, be placed in the metal bath surface of induction coil but not in whole melt, producing mangneto vibration, to metal solidification process generation effect until solidify.Embodiment in this patent shows that the method can significantly change Solidification Structures, crystal grain thinning tissue, and eliminate gravity segregation, have application prospect.And in order further to explore the method essence mechanism, melt temperature curve under the effect of Measurement accuracy the method is significant, but the device in this patent is in specific implementation process, need first by resistance furnace, metal derby melted and be incubated a period of time, again by pouring metal melt in casting mold, and molten metal is fetched into the process of cast from resistance furnace, human factor is more, be difficult on the one hand guarantee that the time of this process experience in each experiment is identical with external environment, and this process inner metal liquid while causing pouring into casting mold due to a large amount of heat radiations temperature decreased, be in each experiment on the other hand, the position of cast gate, height and the mode of watering the pouring type such as fast and liquid metal filling are also difficult to be consistent.Because molten metal is very fast in high temperature section cooling rate, these two kinds of unfavorable factors cause the actual pouring temperature difference in different experiments larger, and the temperature-fall period of molten metal experience also can be different, finally can have influence on actual solidified structure.In addition, traditional thermometry mainly contains two kinds: the one, from sidewall punching, in advance thermocouple level to be inserted casting mold, and the drawback of this method is: melt is in being just poured into casting mold time, flow very violent, temperature fluctuation is very large, lower the temperature very fast, so the temperature that thermocouple records has larger error.The 2nd, after to be cast completing, ability is inserted thermocouple in melt, and pour into after the casting mold that temperature is lower when molten metal, can form and solidify shell rapidly at type wall place, and the thermocouple inserting again also can produce certain chilling action to the melt of region, this two factor causes the temperature recording to have larger error, and the impact of cannot reflection type wall place melt forming core, growing up on melt temperature, and this impact is particularly crucial for the mechanism of understanding pulse magneto vibration thinning metal solidification texture.To sum up, the temperature curve error of using conventional method to record is on the one hand larger, is difficult on the other hand obtain some crucial information.
Summary of the invention
In order to solve prior art problem, the object of the invention is to overcome the deficiency that prior art exists, provide a kind of in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, can accurately record the temperature curve of melt inside under pulse magneto oscillation treatment, measurement mechanism is simple and easy to do, and data measured accurately and reliably.
For reaching foregoing invention, create object, the present invention adopts following technical proposals:
A kind of in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, comprise temperature test analytical system, casting apparatus and pulse magneto oscillation treatment device, temperature test analytical system is by temperature thermocouple, Temperature-collection Recorder and thermocouple fixing device form, the signal output part of temperature thermocouple is connected with the signal receiving end of Temperature-collection Recorder, the measured temperature of the inner detection position of metal bath that Temperature-collection Recorder monitoring is in real time to be measured, and output temperature measured value information, casting apparatus is by casting device, medium frequency induction power supply and induction coil form, metal bath is loaded in the inner chamber of casting device, the top cover that is provided with suitable for reading of casting device, on top cover, be provided with the hole slot structure that temperature thermocouple is installed, make top cover form thermocouple fixing device, temperature thermocouple at least comprises one, at casting device, be provided with heat-insulating material overcoat, casting device is placed on to induction coil interior zone outward together with heat-insulating material, medium frequency induction power supply is controlled induction coil by switching device and is produced pulsed magnetic field, in solid metal in being loaded into casting device, generate eddy current, make its heating fusing, pulse magneto oscillation treatment device consists of the pulse power and solenoid, the pulse power is controlled solenoid by switching device, the metal bath being loaded in casting device is applied to pulse magneto oscillation treatment, the temperature information of the metal bath inside by Temperature-collection Recorder recording occurring continuously in pulse magneto oscillation treatment technique, and the temperature variation curve of metals plotted melt.
As the improvement of technical solution of the present invention, the solenoid of the induction coil of above-mentioned casting apparatus and pulse magneto oscillation treatment device shares identical coil.
Improvement as the invention described above technical scheme, the switching device of the switching device of above-mentioned casting apparatus and pulse magneto oscillation treatment device integrates, adopt double-point double-throw switch, the switching device and the pulse magneto oscillation treatment device that are casting apparatus share a double-point double-throw switch, induction coil is electrically connected to the central binding post of double-point double-throw switch, and double-point double-throw switch left and right two pairs of posts are electrically connected to medium frequency induction power supply and the pulse power respectively.
The preferred running parameter of the above-mentioned pulse power is: pulse current is 10-20000A, and pulse width is 5 μ s-50ms, and effect frequency is 0.015-2KHz; The preferred running parameter of above-mentioned medium frequency induction power supply is: electric current is 0-100A, and effect frequency is 0-1000Hz.
As the improvement of technique scheme, by the top cover of casting device, the position, quantity and the insertion depth that make to install temperature thermocouple are adjustable respectively.
The material thickness of above-mentioned heat-insulating material overcoat is preferably 5-30mm.
The material of above-mentioned heat-insulating material overcoat preferably forms by floating pearl mixing water glass.
Above-mentioned casting device is preferred graphite crucible preferably.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. the invention provides a kind of in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, saved cast step, avoided due in each experiment due to the molten metal loses heat in casting process of coming out of the stove, and the mode of cast and liquid metal filling is difficult to be consistent and the melt internal temperature deviation that causes, thereby record more accurately metal bath temperature curve under pulse magneto oscillation treatment;
2. device provided by the present invention, the chilling action of having avoided casting mold to produce molten metal, and the chilling action of thermocouple this time difference of just inserting after cast and thermocouple and the melt internal temperature deviation that causes, can accurately record the temperature curve of melt under pulse magneto oscillation treatment;
3. the present invention has overcome this shortcoming that affects that temperature curve error that traditional thermometry records is large and be difficult to reflection type wall place melt forming core, grow up on melt temperature, thereby records more accurately metal bath temperature curve under pulse magneto oscillation treatment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of the embodiment of the present invention one continuously measuring discontinuous metal melt temperature.
Fig. 2 is used melt center under the measured pulse magneto oscillation treatment of the device of the embodiment of the present invention one continuously measuring discontinuous metal melt temperature and temperature curve near type wall place.
The specific embodiment
Details are as follows for the preferred embodiments of the present invention:
embodiment mono-:
In the present embodiment, referring to Fig. 1 and Fig. 2, a kind of in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, comprise temperature test analytical system, casting apparatus and pulse magneto oscillation treatment device, temperature test analytical system is by temperature thermocouple, Temperature-collection Recorder 3 and thermocouple fixing device form, the signal output part of temperature thermocouple is connected with the signal receiving end of Temperature-collection Recorder 3, the measured temperature of the metal bath 7 inner detection positions that Temperature-collection Recorder 3 monitoring is in real time to be measured, and output temperature measured value information, casting apparatus is by casting device 5, medium frequency induction power supply 11 and induction coil 6 form, casting device 5 is selected graphite crucible, specification is Φ 30 * Φ 65 * 85, metal bath 7 is loaded in the inner chamber of casting device 5, the top cover 4 that is provided with suitable for reading of casting device 5, on top cover 4, be provided with the hole slot structure that temperature thermocouple is installed, make top cover form thermocouple fixing device, temperature thermocouple comprises two, be respectively first melt temperature thermocouple 1 and second melt temperature thermocouple 2, temperature thermocouple adopts K type thermocouple, at casting device 5, be provided with columniform heat-insulating material overcoat 8, casting device 5 is placed in to induction coil 6 interior zones together with heat-insulating material overcoat 8, medium frequency induction power supply 11 is controlled induction coil 6 by switching device and is produced pulsed magnetic field, in metal derby in being loaded into casting device 5, generate eddy current, make its heating fusing, pulse magneto oscillation treatment device consists of the pulse power 10 and solenoid, the pulse power 10 is controlled solenoid by switching device, the metal bath 7 being loaded in the inner chamber of casting device 5 is applied to pulsed magnetic field action, metal bath 7 is carried out to pulse magneto oscillation treatment, the temperature information of metal bath 7 inside by Temperature-collection Recorder 3 recording occurring continuouslys in pulse magneto oscillation treatment technique, and the temperature variation curve of metals plotted melt.
In the present embodiment, referring to Fig. 1, the solenoid of the induction coil 6 of casting apparatus and pulse magneto oscillation treatment device shares identical coil, the coil using for spring shape induction coil, the number of turn be 11, the number of plies is 2.
In the present embodiment, referring to Fig. 1, the switching device of the switching device of casting apparatus and pulse magneto oscillation treatment device integrates, adopt double-point double-throw switch 9, the switching device and the pulse magneto oscillation treatment device that are casting apparatus share a double-point double-throw switch 9, induction coil 6 is electrically connected to the central binding post of double-point double-throw switch 9, and double-point double-throw switch 9 left and right two pairs of posts are electrically connected to medium frequency induction power supply 11 and the pulse power 10 respectively.
Referring to Fig. 1 and Fig. 2, utilize the device of embodiment continuously measuring discontinuous metal melt temperature to complete the experiment of doing for fine aluminium, its experiment situation and result are described below:
530 grams of technical pure aluminium blocks that are 99.7% by purity are inserted in graphite crucible, graphite crucible is placed in the columniform heat-insulating material overcoat 8 of induction coil 6 inside, first the plug-in strip of double-point double-throw switch 9 is pressed into left side, by 11 pairs of induction coils of induction power supply 6, importing size is 10-60A, frequency is the alternating current of 20-500HZ, effect due to electromagnetic induction, fine aluminium piece in graphite crucible generates eddy current and generates heat and make fine aluminium piece fusing, after the fusing of fine aluminium piece, two K type thermocouples are inserted respectively in the metal bath 7 of fine aluminium formation, by top cover 4, the degree of depth of the position of first melt temperature thermocouple 1 and second melt temperature thermocouple 2 and immersion metal bath 7 is fixed, the temperature of first melt temperature thermocouple, 1 test metal bath 7 centers wherein, the temperature of the metal bath 7 at second the melt temperature thermocouple close graphite crucible of 2 test place, 2 temperature in metal bath 7 are detected in real time.When metal bath 7 is raised to the predetermined temperature of 700 ℃, the plug-in strip of double-point double-throw switch 9 is pressed into right side, by 10 pairs of induction coils of the pulse power 6, importing parameter is 4K
1hz, 8h
1a, 50b
1the pulse current of μ s.K in this patent
1, h
1, b
1be device parameter, the change with experiment condition does not change.Metal bath 7 in 10 pairs of induction coils 6 of the pulse power is implemented pulse magneto oscillation treatment, by Temperature-collection Recorder 3, obtain temperature and the real-time change thereof of melt close beta point, record the temperature-time graph at melt center and type wall place under pulse magneto oscillation treatment accurately and reliably, see Fig. 2.
Compare traditional temp measuring method, when the device of use the present embodiment continuously measuring discontinuous metal melt temperature is measured the temperature in metal bath 7, saved casting process, can more stablize, record exactly melt cooling curve, for studying the mechanism of pulse magneto vibration thinning metal solidification texture, provide temperature data accurately and reliably.
embodiment bis-:
The present embodiment and embodiment mono-are basic identical, and special feature is:
By being equipped with a plurality of holes on the top cover 4 at casting device 5, the position, quantity and the insertion depth that make to install temperature thermocouple are adjustable respectively.Except adopting first melt temperature thermocouple 1 and second melt temperature thermocouple 2, also set up the 3rd melt temperature thermocouple, each thermocouple that is placed in metal bath inside is identical apart from casting device 5 distances from bottom, with this, carry out the temperature of the position to be measured at the interior same depth of continuously measuring discontinuous metal melt 7 place, and the test point temperature variation curve of metals plotted melt.
By reference to the accompanying drawings the embodiment of the present invention is illustrated above; but the invention is not restricted to above-described embodiment; can also make multiple variation according to the object of innovation and creation of the present invention; the change of making under all Spirit Essences according to technical solution of the present invention and principle, modification, substitute, combination, simplify; all should be equivalent substitute mode; as long as goal of the invention according to the invention; only otherwise deviate from know-why and the inventive concept of the present invention's device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique, all belong to protection scope of the present invention.
Claims (8)
1. the device of a continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique, mainly comprise temperature test analytical system, described temperature test analytical system is by temperature thermocouple, Temperature-collection Recorder (3) and thermocouple fixing device form, the signal output part of described temperature thermocouple is connected with the signal receiving end of described Temperature-collection Recorder (3), described Temperature-collection Recorder (3) is monitored the measured temperature of the inner detection position of metal bath to be measured (7) in real time, and output temperature measured value information, it is characterized in that: also comprise casting apparatus and pulse magneto oscillation treatment device, described casting apparatus is by casting device (5), medium frequency induction power supply (11) and induction coil (6) form, metal bath (7) is loaded in the inner chamber of described casting device (5), the top cover (4) that is provided with suitable for reading of described casting device (5), on described top cover (4), be provided with the hole slot structure that described temperature thermocouple is installed, make described top cover form thermocouple fixing device, described temperature thermocouple at least comprises one, at described casting device (5), be provided with heat-insulating material overcoat (8), described casting device (5) is placed in to described induction coil (6) interior zone together with described heat-insulating material overcoat (8), described medium frequency induction power supply (11) is controlled described induction coil (6) by switching device and is produced pulsed magnetic field, in solid metal in being loaded into described casting device (5), generate eddy current, make its heating fusing, described pulse magneto oscillation treatment device consists of the pulse power (10) and solenoid, the described pulse power (10) is controlled described solenoid by switching device, the metal bath (7) being loaded in the inner chamber of described casting device (5) is applied to pulse magneto oscillation treatment, the inner temperature information of metal bath (7) by described Temperature-collection Recorder (3) recording occurring continuously in pulse magneto oscillation treatment technique, and the temperature variation curve of metals plotted melt.
According to claim 1 in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, it is characterized in that: the solenoid of the induction coil of described casting apparatus (6) and described pulse magneto oscillation treatment device shares identical coil.
According to claim 2 in pulse magneto oscillation treatment technique the device of continuously measuring discontinuous metal melt temperature, it is characterized in that: the switching device of the switching device of described casting apparatus and described pulse magneto oscillation treatment device integrates, adopt double-point double-throw switch (9), the switching device and the described pulse magneto oscillation treatment device that are described casting apparatus share a described double-point double-throw switch (9), described induction coil (6) is electrically connected to the central binding post of described double-point double-throw switch (9), described double-point double-throw switch (9) left and right two pairs of posts are connected with described medium frequency induction power supply (11) and the pulse power (10) respectively.
4. according to the device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique described in any one in claim 1～3, it is characterized in that: the running parameter of the described pulse power (10) is: pulse current is 10-20000A, pulse width is 5 μ s-50ms, and effect frequency is 0.015-2KHz; The running parameter of described medium frequency induction power supply (11) is: electric current is 0-100A, and effect frequency is 0-1000Hz.
5. according to the device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique described in any one in claim 1～3, it is characterized in that: by the top cover (4) of described casting device (5), the position, quantity and the insertion depth that make to install described temperature thermocouple are adjustable respectively.
6. according to the device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique described in any one in claim 1～3, it is characterized in that: the material thickness of described heat-insulating material overcoat (8) is 5-30mm.
7. according to the device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique described in any one in claim 1～3, it is characterized in that: the material of described heat-insulating material overcoat (8) forms by floating pearl mixing water glass.
8. according to the device of continuously measuring discontinuous metal melt temperature in pulse magneto oscillation treatment technique described in any one in claim 1～3, it is characterized in that: described casting device (5) adopts graphite crucible.
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| 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 |
| CN103949616A (en) * | 2014-04-14 | 2014-07-30 | 上海大学 | Device for measuring temperature of melt in pulse magnetostrictive liquid level oscillating process |
| CN103968968A (en) * | 2014-04-02 | 2014-08-06 | 上海大学 | Device for measuring thermal historical curve of melt under action of pulse magneto-oscillation |
| CN103994836A (en) * | 2014-05-19 | 2014-08-20 | 上海大学 | Device for measuring melt heat history curve under action of pulse magnetic liquid level oscillation |
| CN104048780A (en) * | 2014-06-06 | 2014-09-17 | 上海大学 | Device for measuring melt heat historical curve in pulse current liquid level disturbance solidification fine-grain process |
| 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 |
| 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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Cited By (8)
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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 |
| 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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