CN105699412A - Testing device and testing method for metal rapid solidification heat flow - Google Patents
Testing device and testing method for metal rapid solidification heat flow Download PDFInfo
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- CN105699412A CN105699412A CN201610049659.5A CN201610049659A CN105699412A CN 105699412 A CN105699412 A CN 105699412A CN 201610049659 A CN201610049659 A CN 201610049659A CN 105699412 A CN105699412 A CN 105699412A
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- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention discloses a testing device and a testing method for metal rapid solidification heat flow. The testing device comprises a droplet emitting system, a data collection system and an atmosphere control system, wherein the droplet emitting system comprises a quartz tube; the quartz tube is electrically heated, a small hole with diameter less than 0.5mm is formed in the bottom part of the quartz tube, and an induction coil is wound on the quartz tube at the upper part of the small hole; an inner cavity of the quartz tube is communicated with an air pressure assembly; the data collection system comprises a base part, the base part is positioned at the bottom part of the quartz tube, and a thermocouple and a cooling assembly are arranged in the base part; the droplet emitting system and the data collection system are arranged in an atmosphere protection chamber of the atmosphere control system. The testing device has the advantages that the structure is simple, the operation is convenient, the accuracy is high, and the testing of metal rapid solidification heat flow can be completed in a laboratory; the direct testing of industrial production can be replaced, the influence to normal production is avoided, the consumption is little, and the testing cost is low.
Description
Technical field
The present invention relates to a kind of rapid solidification metal heat flux measurement device and method of testing, belong to metal material rapid shaping technique field。
Background technology
In iron and steel metallurgical industry, continuous casting steel machine technology is the predominant methods of molten steel casting in recent years。Advanced continuous casting technology requires better slab quality, requires that higher casting speed is to improve production efficiency, it is thus achieved that bigger yield simultaneously。In order to realize the growth of yield, require under high pulling rate that strand solidifies with cooldown rate faster, it is meant that under the identical time, the heat flow of conduction is higher。Meanwhile, the hot-fluid of process of setting is also the key factor affecting slab quality, by controlling rational hot-fluid, is remarkably improved slab quality。Answer this, test rapid solidification metal behavior to analyze the impact of heat flow in process of setting particularly important。
In the industrial production, rapid solidification heat flux measurement is carried out, it will impact is normal to be produced, and is limited to production equipment excessively huge simultaneously, and testing cost is too high。
At present, the Patents of rapid solidification metal test device is less, and research direction is limited, only has the determinator of the determinator to metal freezing degree of supercooling and freezing interface dynamic information。
Publication number is the patent of CN104089972A, in a kind of method measuring metal droplet rapid solidification degree of supercooling and device thereof, prepares metal microparticle drop initially with pulse MP method；Then diverse location in dropping process measures the start time that metal microparticle drop falls in oil and the temperature balancing the moment respectively；The liquid content of various location metal microparticle drop, nucleation temperature and degree of supercooling is obtained subsequently by heat Balance Calculation。
Publication number is the patent of CN248269lY, in the measurement apparatus of rapid solidification metal process median surface dynamic information, measurement apparatus is by pulse laser, battery of lens, light beam equalizer, sample, constant temperature preheating device, digital constant-current source, digital oscilloscope, probe wave filter composition, described laser instrument is controlled to start by computer, pass through battery of lens, light beam is beaten on the operating resistance of sample by light beam equalizer, constant temperature preheating device is placed under sample on sample stage, digital constant-current source provides constant current for measuring circuit, sample both end voltage signal connects people's digital oscilloscope through probe wave filter, then through computer disposal。
Although above the two patent has advantage in each self-test, but can not the heat flow in rapid solidification metal process be tested, and for Ferrous Metallurgy continuous casting production field, process of setting hot-fluid is to affect the factor that slab quality is particularly important。
Summary of the invention
Present invention solves the technical problem that and be: lack the apparatus and method that can substitute industrial test rapid solidification with heat transfer relation for prior art, there is provided a kind of novel rapid solidification metal heat flux measurement device and method of testing, for probing into the heat transfer impact on rapid solidification metal process。
The present invention adopts the following technical scheme that realization:
A kind of rapid solidification metal heat flux measurement device, including drop emission system, data collecting system and atmosphere control system；
Described drop emission system includes an electrically heated quartz ampoule 41 of employing, offers the diameter aperture less than 0.5mm bottom described quartz ampoule 41, and the top quartz ampoule of described aperture has installed around induction coil 42；Described quartz ampoule 41 inner chamber and an air pressure assembly 43 connect, for pressurizeing to quartz ampoule inner chamber；
Described data collecting system includes the pedestal 21 being positioned at bottom quartz ampoule, and described pedestal 21 is internal is provided with thermocouple 23 and cooling package；
Described drop emission system and data collecting system are arranged in the atmosphere protection room 31 of atmosphere control system。
Further, described air pressure assembly 43 is the air bag of a connection air pump, and described air bag is by pipeline and quartz ampoule 41 inner space。
Further, described pedestal 21 is copper platform, and inside is provided with cooling water circulation pipeline 22, and described thermocouple 23 buries and overlays on inside base platform, and is connected with NI temperature collect module。
Further, described atmosphere protection room 31 is respectively equipped with air inlet pipe 33 and escape pipe 34。
Further, top, described atmosphere protection room 31 is openable protectiveness gas hood 35, and described protectiveness gas hood 35 is sealed by pivoted frame 12 and covers on atmosphere protection room 31, and described quartz ampoule 41 is vertically connected on protectiveness gas hood 35。
Further, described atmosphere protection room 31 is provided with observation window 32。
In the present invention, the internal pyrometer 44 being additionally provided with detection real time temperature of described quartz ampoule 41。
The invention also discloses the method for testing of a kind of above-mentioned rapid solidification metal heat flux measurement device, comprise the steps:
The first step, dress sample, put into 2-5g steel sample bottom quartz ampoule；
Second step, evacuation, seal atmosphere protection room, then inside be evacuated to vacuum 10-15-10-25Pa, and it is filled with inert protective gas, finally make atmosphere protection room pressure reach an atmospheric pressure；
3rd step, fusing metal, be heated to target melting temperature the steel sample bottom quartz ampoule by induction coil；
4th step, impulse jet, open the cooling water pipeline of data collecting system, and to control cooling water circulation flow be 2.5-15L/min, inside quartz ampoule, pass into pulse inert gas by air pressure assembly, be ejected into pedestal from quartz ampoule by the molten steel drop of air pressure controlled melting；
5th step, data acquisition, namely start data acquisition by thermocouple with the frequency of 0-200Hz before the 4th step starts, until molten steel drop completes cooled and solidified；
6th step, data process, and the temperature signal collected calculates the situation of change of hot-fluid in droplet solidification process。
Further, in test process, by pyrometer, the temperature in quartz ampoule is monitored in real time, it is ensured that before drop injection, real time temperature is not less than target melting temperature。
Preferably, 3-4g preferably placed by described steel sample, and the vacuum of atmosphere protection indoor is preferably 10-20-10-25Pa, the preferred 5-10L/min of cooling water circulation flow, the preferred 50-150Hz of data acquiring frequency。
The present invention provides a kind of rapid solidification metal heat flux measurement device and method of testing, it may be achieved molten drop rapid solidification test, and by the heat flow of copper substrate and change thereof during measuring solidification。The present invention adopts quartz ampoule to hold the sample under high temperature, with induction coil to its heating so as to melt。For making molten drop rapid solidification, copper substrate adopt cooling water circulation mode quickly cool down。The data that data collecting system of the present invention gathers are temperature signals, and by T-shaped thermocouple temperature measurement, NI temperature collect module gathers, and calculates the heat flow of real-time change in process of setting by Computer。
The present invention mainly has the advantages that
1) equipment is simple。The present invention includes three systems, and more than totally ten parts are constituted, and have the advantages that test equipment is simple, easy to operate。
2) testing cost is low。The present invention can realize laboratory scale metal freezing heat flux measurement, thus the direct test substituted in commercial production, does not affect normal production, consumes little simultaneously, and testing cost is low。
3) accuracy is high。The present invention adopts and buries the T-shaped thermocouple direct temperature measurement overlaying on copper substrate, and temperature data carries out soon high speed acquisition with NI temperature acquisition mould, measures accurate, timely, high through calculating hot-fluid accuracy。
Below in conjunction with the drawings and specific embodiments, the present invention will be further described。
Accompanying drawing explanation
Fig. 1 is a kind of rapid solidification metal heat flux measurement apparatus structure schematic diagram of application in embodiment。
Fig. 2 is the schematic diagram opened by the protectiveness gas hood of test device in embodiment。
Fig. 3 is embodiment 1-3 institute calorimetric flow graph table。
Fig. 4 is embodiment 4-6 institute calorimetric flow graph table。
Number in the figure:
11-support, 12-pivoted frame；
21-substrate, the cooling water circulation pipeline of 22-, 23-thermocouple；
31-atmosphere protection room, 32-observation window, 33-air inlet pipe, 34-escape pipe, 35-protectiveness gas hood；
41-quartz ampoule, 42-induction coil, 43-air pressure assembly, 44-pyrometer。
Detailed description of the invention
Referring to Fig. 1 and Fig. 2, it is illustrated that in rapid solidification metal heat flux measurement device include drop emission system, data collecting system and atmosphere control system three parts, three parts are arranged on a support 11。
Wherein, described drop emission system includes an electrically heated quartz ampoule 41 of employing, offers the diameter aperture less than 0.5mm bottom described quartz ampoule 41, and the top quartz ampoule of described aperture has installed around induction coil 42；Described quartz ampoule 41 inner chamber and an air pressure assembly 43 connect, for pressurizeing to quartz ampoule inner chamber；Adopting diameter in diagram is that the quartz ampoule of 15mm is to hold sample, the induction coil adopting diameter to be 50mm heats and melts sample, the air bag adopting a connection air pump promotes drop to penetrate as air pressure assembly, described air bag one end is connected with air pump, and the other end is by pipeline and quartz ampoule 41 inner space。In order to coordinate quartz ampoule size, be mild steel granule or powder according to test button, then sample is approximately 2-5g, it is preferred to 3-4g, more preferably 3g。In order to melt sample, and realizing different heating rates, can control the power of induction coil, general power is 2-3kw, maximum up to 5kw。
The pyrometer 44 of detection real time temperature it is additionally provided with, in real time the specimen temperature in quartz ampoule being monitored inside described quartz ampoule 41。
Described data collecting system includes the pedestal 21 being positioned at bottom quartz ampoule, and for the molten steel drop of access drippage and make its cooled and solidified, described pedestal 21 is internal is provided with thermocouple 23 and cooling package。In being embodied as application, copper substrate is red copper material, being the square platform of 100mm in the length of side, be positioned at immediately below discharger, inside is provided with cooling water circulation pipeline 22, adopt cooling water circulation cooling, in order to realize different cooldown rates, cooling water flow can be controlled, be generally 2.5-15L/min, it is preferably 5-10L/min, more preferably 7.5-10L/min。Described thermocouple 23 buries and overlays on inside base platform, and is connected with NI temperature collect module, and thermocouple 23 can adopt T-shaped thermocouple, T-shaped thermocouple, NI temperature collect module and computer constitute data acquisition unit。In data acquisition, adopting certain frequency to carry out multi collect, the fast frequency acquisition of NI temperature acquisition mould is generally 0-200Hz, it is preferred to 50-150Hz, more preferably 100-150Hz。
Above-mentioned drop emission system and data collecting system are arranged in the atmosphere protection room 31 of atmosphere control system; atmosphere protection room 31 supports fixing by support 11; described atmosphere protection room 31 is respectively equipped with air inlet pipe 33 and escape pipe 34; described atmosphere protection room 31 is provided with observation window 32; adopting quartz glass material, diameter is 150mm。Top, described atmosphere protection room 31 is openable protectiveness gas hood 35; described protectiveness gas hood 35 is sealed by pivoted frame 12 and covers on atmosphere protection room 31; described quartz ampoule 41 is vertically connected on protectiveness gas hood 35; as shown in Figure 2; rotate protectiveness gas hood 35 can be removed by pivoted frame 12, simultaneously need to quartz ampoule is removed from induction coil。Atmosphere protection room and protectiveness gas hood adopt stainless steel, and internal diameter is the cylindrical structural of 750mm；Protective gas adopts argon or argon hydrogen, and before pouring protective gas, it is necessary to atmosphere protection indoor are carried out evacuation, its concrete control vacuum is generally 10-15-10-25Pa, it is preferred to 10-20-10-25Pa, more preferably 10-25Pa。
The method of testing embodiment applying above-mentioned rapid solidification metal heat flux measurement device is as follows:
Metal-like is placed on the bottom of quartz ampoule, and quartz ampoule is positioned at the middle part of atmosphere protection room, regulates the protective atmosphere of the inside, and sample is begun to warm up by energising。
When reaching predetermined temperature, stopping heating, molten drop penetrates from the aperture (diameter is less than 0.5mm) at the bottom of quartz ampoule pipe by applying air pressure。
Molten drop quickly cools down on water-cooled cuprio and starts solidification, and carries out temperature data acquisition by thermocouple。Finally the data of collection are carried out hot-fluid calculating on computers through indirect problem algorithm。
Illustrate below according to concrete EXPERIMENTAL EXAMPLE。
Embodiment 1
The experiment of rapid solidification metal heat flux measurement adopts rapid solidification metal heat flux measurement device to be as shown in Figures 1 and 2 measured rapid solidification metal hot-fluid, specifically includes following sequence step:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1550 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 7.5L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
By changing the degree of superheat, keeping other conditions constant, the impact that rapid solidification is conducted heat by the test degree of superheat, such as embodiment 2,3。
Embodiment 2
Rapid solidification metal experiment adopts a kind of rapid solidification metal heat flux measurement device as shown in Figure 1 to carry out, including sequential steps in detail below:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1600 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 7.5L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
Embodiment 3
Rapid solidification metal experiment adopts a kind of rapid solidification metal heat flux measurement device as shown in Figure 1 to carry out, including sequential steps in detail below:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1650 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 7.5L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
By changing cooling water flow, keeping other conditions constant, the impact that rapid solidification is conducted heat by test cooldown rate, such as embodiment 4,5,6。
Embodiment 4
Rapid solidification metal experiment adopts a kind of rapid solidification metal heat flux measurement device as shown in Figure 1 to carry out, including sequential steps in detail below:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1580 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 5L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
Embodiment 5
Rapid solidification metal experiment adopts a kind of rapid solidification metal heat flux measurement device as shown in Figure 1 to carry out, including sequential steps in detail below:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1580 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 7.5L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
Embodiment 6
Rapid solidification metal experiment adopts a kind of rapid solidification metal heat flux measurement device as shown in Figure 1 to carry out, including sequential steps in detail below:
1, fusing test button
(1) charging: opened by the protectiveness gas hood lid with sealing ring, put into 3g steel sample in the bottom of quartz ampoule, closes protectiveness gas hood lid。
(2) evacuation: utilize pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum 10-25Pa, and it is filled with inert protective gas Ar, finally make its pressure reach an atmospheric pressure。
(3) fusing metal: the sample bottom quartz ampoule is heated by induction coil energising, and target setting temperature is 1580 DEG C, and with pyrometer, specimen temperature is monitored in real time, stops heating upon reaching a predetermined temperature。
(4) impulse jet: the air inlet pipe accessed by quartz ampoule upper end passes into noble gas, realizes injection to molten metal drop。
2, droplet solidification and data acquisition
(1) cooling water is opened: at the valve of the front opening cooling water recirculation system of drop impulse jet, adjustment cooling water flow is 10L/min。
(2) data acquisition: data collecting system starts to start data acquisition with the frequency of 150Hz before droplet jet to the copper substrate with water cooling plant。
3, later data processes
The data obtained through data collecting system are temperature value, can calculate the situation of change of hot-fluid in droplet solidification process by computer。
Test parameter in embodiment 1-6 is summarized in table 1, and embodiment 1-3 institute calorimetric stream variation tendency is plotted in Fig. 3, embodiment 4-6 institute calorimetric stream variation tendency is plotted in Fig. 4, obtain steel sample changes of heat flux trend in process of setting under different curing conditions。
The parameter list of the steel sample rapid solidification hot-fluid in table 1 embodiment 1-6
Embodiment above describes the ultimate principle of the present invention and principal character and advantages of the present invention; skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the specific works principle that the present invention is simply described described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements both fall within the claimed scope of the invention, and claimed scope is defined by appending claims and equivalent thereof。
Claims (10)
1. a rapid solidification metal heat flux measurement device, it is characterised in that: include drop emission system, data collecting system and atmosphere control system；
Described drop emission system includes the electrically heated quartz ampoule of an employing (41), and described quartz ampoule (41) bottom offers the diameter aperture less than 0.5mm, and the top quartz ampoule of described aperture has installed around induction coil (42)；Described quartz ampoule (41) inner chamber and an air pressure assembly (43) connection, for pressurizeing to quartz ampoule inner chamber；
Described data collecting system includes the pedestal (21) being positioned at bottom quartz ampoule, and described pedestal (21) is internal is provided with thermocouple (23) and cooling package；
Described drop emission system and data collecting system are arranged in the atmosphere protection room (31) of atmosphere control system。
2. a kind of rapid solidification metal heat flux measurement device according to claim 1, described air pressure assembly (43) is the air bag of a connection air pump, and described air bag is by pipeline and quartz ampoule (41) inner space。
3. a kind of rapid solidification metal heat flux measurement device according to claim 1, described pedestal (21) is copper platform, inside is provided with cooling water circulation pipeline (22), described thermocouple (23) buries and overlays on inside base platform, and is connected with NI temperature collect module。
4. a kind of rapid solidification metal heat flux measurement device according to claim 1, described atmosphere protection room (31) is respectively equipped with air inlet pipe (33) and escape pipe (34)。
5. a kind of rapid solidification metal heat flux measurement device according to claim 4; described atmosphere protection room (31) top is openable protectiveness gas hood (35); described protectiveness gas hood (35) is sealed by pivoted frame (12) and covers on atmosphere protection room (31), and described quartz ampoule (41) is vertically connected on protectiveness gas hood (35)。
6. a kind of rapid solidification metal heat flux measurement device according to claim 5, described atmosphere protection room (31) is provided with observation window (32)。
7. a kind of rapid solidification metal heat flux measurement device according to any one of claim 1-6, described quartz ampoule (41) top is additionally provided with the pyrometer (44) of detection real time temperature。
8. the method for testing of the rapid solidification metal heat flux measurement device in a claim 1-7, it is characterised in that comprise the steps:
The first step, dress sample, put into 2-5g steel sample bottom quartz ampoule；
Second step, evacuation, seal atmosphere protection room, then inside be evacuated to vacuum 10-15-10-25Pa, and it is filled with inert protective gas, finally make atmosphere protection room pressure reach an atmospheric pressure；
3rd step, fusing metal, be heated to target melting temperature the steel sample bottom quartz ampoule by induction coil；
4th step, impulse jet, open the cooling water pipeline of data collecting system, and to control cooling water circulation flow be 2.5-15L/min, inside quartz ampoule, pass into pulse inert gas by air pressure assembly, be ejected into pedestal from quartz ampoule by the molten steel drop of air pressure controlled melting；
5th step, data acquisition, namely start data acquisition by thermocouple with the frequency of 0-200Hz before the 4th step starts, until molten steel drop completes cooled and solidified；
6th step, data process, and the temperature signal collected calculates the situation of change of hot-fluid in droplet solidification process。
9. the method for testing of a kind of rapid solidification metal heat flux measurement device according to claim 8, in test process, is monitored the temperature in quartz ampoule in real time by pyrometer, it is ensured that before drop injection, real time temperature is not less than target melting temperature。
10. the method for testing of a kind of rapid solidification metal heat flux measurement device according to claim 8,3-4g preferably placed by described steel sample, and the vacuum of atmosphere protection indoor is preferably 10-20-10-25Pa, the preferred 5-10L/min of cooling water circulation flow, the preferred 50-150Hz of data acquiring frequency。
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| CN106645278A (en) * | 2016-11-22 | 2017-05-10 | 中南大学 | Rapid immersion type metal solidification heat transfer test device and application and application method thereof |
| CN106872512A (en) * | 2016-12-29 | 2017-06-20 | 中南大学 | A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid |
| CN107643316A (en) * | 2017-09-14 | 2018-01-30 | 中南大学 | A kind of quick solidification and heat transfer performance comprehensive test device and method of testing |
| CN107671253A (en) * | 2017-09-30 | 2018-02-09 | 中南大学 | A kind of rapid solidification metal test substrate |
| CN109814632A (en) * | 2018-12-21 | 2019-05-28 | 天津大学仁爱学院 | A kind of precise control device and method of drop temperature |
| CN112179937A (en) * | 2020-09-30 | 2021-01-05 | 张琦 | Metal rapid solidification test substrate and use method thereof |
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