CN105699412B - A kind of rapid solidification metal heat flux measurement device and test method - Google Patents
A kind of rapid solidification metal heat flux measurement device and test method Download PDFInfo
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- CN105699412B CN105699412B CN201610049659.5A CN201610049659A CN105699412B CN 105699412 B CN105699412 B CN 105699412B CN 201610049659 A CN201610049659 A CN 201610049659A CN 105699412 B CN105699412 B CN 105699412B
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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 kind of rapid solidification metal heat flux measurement device and test method, which includes drop emission system, data collecting system and atmosphere control system；The drop emission system includes one and uses electrically heated quartz ampoule, and the quartz bottom of the tube offers the aperture that a diameter is less than 0.5mm, and the top quartz ampoule of the aperture has installed around induction coil；The quartz tube cavity is connected with an air pressure component；The data collecting system includes being located at the pedestal of quartzy bottom of the tube, and the base interior is equipped with thermocouple and cooling component；The drop emission system and data collecting system are arranged in the atmosphere protection room of atmosphere control system.Test equipment of the present invention is simple and convenient to operate, accuracy is high, and the heat flux measurement of rapid solidification metal can be realized in laboratory scale, so as to substitute the direct test in industrial production, is not affected the normal production, while consumes small, and testing cost is low.
Description
Technical field
The present invention relates to a kind of rapid solidification metal heat flux measurement device and test methods, belong to metal material rapid shaping
Technical 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
It is required that better slab quality, while higher casting speed is required to improve production efficiency, obtain the yield of bigger.For reality
Show the growth of yield, strand is required to be solidified with faster cooldown rate under high pulling rate, it is meant that the hot-fluid conducted under same time
Measure higher.Meanwhile the hot-fluid of process of setting is also that an important factor for influencing slab quality, by controlling rational hot-fluid, can show
It writes and improves slab quality.Should this, test rapid solidification metal behavior and analyze heat flow in process of setting influence it is particularly important.
In the industrial production, quick solidification heat flux measurement is carried out, it will influence normal production, while be limited to production equipment mistake
In huge, testing cost is too high.
At present, the related patents of rapid solidification metal test device are less, and research direction is limited, only to metal freezing
The measurement device of degree of supercooling and the measurement device of freezing interface dynamic information.
The patent of Publication No. CN104089972A, a kind of method and its dress for measuring metal droplet and quickly solidifying degree of supercooling
In putting, metal microparticle drop is prepared using pulse MP method first；Then it is surveyed respectively on the different location in dropping process
Determine the temperature at quarter and the moment of balance at the beginning of metal microparticle drop is fallen into oil；Difference is then obtained by heat Balance Calculation
The liquid content of metal microparticle drop, nucleation temperature and degree of supercooling at position.
The patent of Publication No. CN248269lY, the measuring device of interface kinetics information during rapid solidification metal
In, measuring device is shown by pulse laser, lens group, light beam balanced device, sample, constant temperature preheating device, digital constant-current source, number
Wave device, probe wave filter composition, the laser is controlled by computer to be started, and is beaten light beam by lens group, light beam balanced device
On the operating resistance of sample, constant temperature preheating device is placed under sample on sample stage, and digital constant-current source provides perseverance for measuring circuit
Constant current, sample both end voltage signal connect people's digital oscilloscope, then handle through computer through wave filter of popping one's head in.
Although the two above patents have advantage in terms of each self-test, cannot be to rapid solidification metal during
Heat flow is tested, and for Ferrous Metallurgy continuous casting field, process of setting hot-fluid is to influence slab quality extremely
Important factor.
Invention content
Present invention solves the technical problem that it is：The quick solidification of industrial test and heat transfer can be substituted by lacking for the prior art
The device and method of relationship provide a kind of novel rapid solidification metal heat flux measurement device and test method, are passed for probing into
Influence of the heat to 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 control climate
System；
The drop emission system includes one and uses electrically heated quartz ampoule 41, and 41 bottom of quartz ampoule offers always
Diameter is less than the aperture of 0.5mm, and the top quartz ampoule of the aperture has installed around induction coil 42；41 inner cavity of quartz ampoule and a gas
Pressure component 43 connects, for pressurizeing to quartzy tube cavity；
The data collecting system includes being located at the pedestal 21 of quartzy bottom of the tube, and the pedestal 21 is internally provided with thermocouple 23
And cooling component；
The drop emission system and data collecting system are arranged in the atmosphere protection room 31 of atmosphere control system.
Further, air bag of the air pressure component 43 for a connection air pump, the air bag pass through pipeline and quartz ampoule 41
Inner cavity connects.
Further, the pedestal 21 is copper platform, is internally provided with cooling water circulation pipeline 22, the thermocouple 23 buries
It overlays on inside base platform, and is connect with NI temperature collecting modules.
Further, air inlet pipe 33 and air outlet pipe 34 are respectively equipped on the atmosphere protection room 31.
Further, it is openable protectiveness gas hood 35, the protectiveness gas hood 35 at the top of the atmosphere protection room 31
It is covered on atmosphere protection room 31 by pivoted frame 12, the quartz ampoule 41 is connected to vertically on protectiveness gas hood 35.
Further, the atmosphere protection room 31 is equipped with observation window 32.
In the present invention, the pyrometer 44 of detection real time temperature is additionally provided with inside the quartz ampoule 41.
The invention also discloses a kind of test method of above-mentioned rapid solidification metal heat flux measurement device, including walking as follows
Suddenly：
The first step, dress sample, quartzy bottom of the tube is put by 2-5g steel samples；
Second step vacuumizes, and atmosphere protection room is sealed, and inside then is evacuated to vacuum degree 10-15-10-25Pa, and
Inert protective gas is filled with, atmosphere protection room pressure is finally made to reach an atmospheric pressure；
Third step, fusing metal, carry out being heated to target melting temperature by induction coil to the steel sample of quartzy bottom of the tube；
4th step, impulse jet, open the cooling water pipeline of data collecting system, and control the cooling water circulation flow to be
2.5-15L/min is passed through pulse inert gas by air pressure component to quartz ampoule inside, the molten steel liquid melted by pressure control
Drop is ejected into from quartz ampoule on pedestal；
5th step, data acquire, and starting data by thermocouple with the frequency of 0-200Hz before the 4th step starts adopts
Collection, until molten steel drop completes cooled and solidified；
The temperature signal collected is calculated the variation feelings of hot-fluid during droplet solidification by the 6th step, data processing
Condition.
Further, during the test, the temperature in quartz ampoule is monitored in real time by pyrometer, ensures drop
Real time temperature is not less than target melting temperature before injection.
Preferably, the steel sample preferably places 3-4g, and the indoor vacuum degree of atmosphere protection is preferably 10-20-10-25Pa is cold
But the preferred 5-10L/min of water circular flow, the preferred 50-150Hz of data acquiring frequency.
The present invention provides a kind of rapid solidification metal heat flux measurement device and test method, it can be achieved that the fast rapid hardening of molten drop
It is solid to test, and measure heat flow by copper substrate and its variation during solidification.The present invention is accommodated using quartz ampoule under high temperature
Sample, it is heated with induction coil and is allowed to melt.For molten drop is made quickly to solidify, cooling water is used in copper substrate
The mode of cycle is quickly cooled down.The data that data collecting system of the present invention is acquired are temperature signals, pass through T-shaped thermocouple
Thermometric, the acquisition of NI temperature collecting modules, and pass through the heat flow that computer calculates real-time change in process of setting.
The present invention mainly has the advantages that：
1) equipment is simple.The present invention includes three systems, and more than totally ten components are formed, and has that test equipment is simple, operation
The characteristics of facilitating.
2) testing cost is low.The present invention can realize laboratory scale metal freezing heat flux measurement, so as to substitute industrial life
Direct test in production, does not affect the normal production, while consumes small, and testing cost is low.
3) accuracy is high.The present invention is using burying the T-shaped thermocouple direct temperature measurement that overlays on copper substrate, and with NI temperature acquisitions
Mould carries out high speed acquisition to temperature data soon, measures accurately, in time, high by calculating hot-fluid accuracy.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Description of the drawings
Fig. 1 is a kind of rapid solidification metal heat flux measurement apparatus structure schematic diagram applied in embodiment.
Fig. 2 is the schematic diagram for opening the protectiveness gas hood of test device in embodiment.
Fig. 3 is embodiment 1-3 institutes calorimetric flow graph table.
Fig. 4 is embodiment 4-6 institutes calorimetric flow graph table.
Figure label：
11- stents, 12- pivoted frames；
21- substrates, 22- cooling water circulation pipelines, 23- thermocouples；
31- atmosphere protections room, 32- observation windows, 33- air inlet pipe, 34- air outlet pipes, 35- protectiveness gas hoods；
41- quartz ampoules, 42- induction coils, 43- air pressure components, 44- pyrometers.
Specific embodiment
Referring to Fig. 1 and Fig. 2, it is illustrated that in rapid solidification metal heat flux measurement device include drop emission system, data and adopt
Collecting system and atmosphere control system three parts, three parts are arranged on a stent 11.
Wherein, the drop emission system includes one using electrically heated quartz ampoule 41, and 41 bottom of quartz ampoule opens up
There is the aperture that a diameter is less than 0.5mm, the top quartz ampoule of the aperture has installed around induction coil 42；41 inner cavity of quartz ampoule
It is connected with an air pressure component 43, for pressurizeing to quartzy tube cavity；Examination is accommodated using the quartz ampoule of a diameter of 15mm in diagram
Sample heats and melts sample using the induction coil of a diameter of 50mm, using the air bag of a connection air pump as air pressure component
Drop is pushed to project, described air bag one end is connect with air pump, the other end is connected by pipeline with 41 inner cavity of quartz ampoule.In order to match
It closing quartzy pipe size, is low-carbon steel particles or powder according to test button, then sample is about 2-5g, preferably 3-4g, into
One step is preferably 3g.It in order to melt sample, and realizes different heating rates, can control the power of induction coil, general power
It is maximum up to 5kw for 2-3kw.
The pyrometer 44 of detection real time temperature is additionally provided with inside the quartz ampoule 41, in real time to the examination in quartz ampoule
Sample temperature is monitored.
The data collecting system includes being located at the pedestal 21 of quartzy bottom of the tube, and the molten steel drop dripped for access simultaneously makes
Its cooled and solidified, the pedestal 21 are internally provided with thermocouple 23 and cooling component.In specific implementation is applied, copper substrate is purple
Copper material in the square platform that the length of side is 100mm, immediately below emitter, is internally provided with cooling water circulation pipeline 22,
It is cooled down using cooling water circulation, in order to realize different cooldown rates, controllable cooling water flow, generally 2.5-15L/min,
Preferably 5-10L/min, further preferably 7.5-10L/min.The thermocouple 23, which buries, to be overlayed on inside base platform, and and NI
Temperature collecting module connects, and T-shaped thermocouple can be used in thermocouple 23, by T-shaped thermocouple, NI temperature collecting modules and calculates mechanism
Into data acquisition device.In data acquisition, multi collect, the fast frequency acquisition of NI temperature acquisition moulds are carried out using certain frequency
Generally 0-200Hz, preferably 50-150Hz, further 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 is supported by stent 11 and fixed, and air inlet pipe 33 and air outlet pipe 34 are respectively equipped on the atmosphere protection room 31,
The atmosphere protection room 31 is equipped with observation window 32, using quartz glass material, a diameter of 150mm.The atmosphere protection room 31
Top is openable protectiveness gas hood 35, and the protectiveness gas hood 35 is covered in atmosphere protection room 31 by pivoted frame 12
On, the quartz ampoule 41 is connected to vertically on protectiveness gas hood 35, as shown in Fig. 2, can be by protectiveness gas by the rotation of pivoted frame 12
Cover 35 is removed, while need to remove quartz ampoule from induction coil.Atmosphere protection room and protectiveness gas hood use stainless steel
Material, internal diameter are the cylindrical structure of 750mm；Protective gas uses argon gas or argon hydrogen, is pouring protective gas
Before, it needs, to vacuumizing in atmosphere protection room, specifically vacuum degree to be controlled to be generally 10-15-10-25Pa, preferably
10-20-10-25Pa, further preferably 10-25Pa。
Test method embodiment using above-mentioned rapid solidification metal heat flux measurement device is as follows：
Metal-like is placed on to the bottom of quartz ampoule, quartz ampoule is located at the middle part of atmosphere protection room, regulates the guarantor of the inside
Shield property atmosphere, is powered and sample is begun to warm up.
When reaching predetermined temperature, stop heating, (diameter is small from the aperture of quartz ampoule tube bottom by applying air pressure for molten drop
In 0.5mm) it projects.
Molten drop is quickly cooled down on water cooling is copper-based and starts to solidify, and passes through thermocouple and carry out temperature data acquisition.
The data of acquisition are finally subjected to hot-fluid calculating on computers by indirect problem algorithm.
It is illustrated below according to specific EXPERIMENTAL EXAMPLE.
Embodiment 1
The experiment of rapid solidification metal heat flux measurement is using rapid solidification metal heat flux measurement dress as shown in Figures 1 and 2
It puts and is measured rapid solidification metal hot-fluid, specifically include following sequential steps：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1550
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 7.5L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
By changing the degree of superheat, keep other conditions constant, test the influence that the degree of superheat conducts heat to rapid solidification, such as
Embodiment 2,3.
Embodiment 2
Rapid solidification metal experiment is carried out using a kind of rapid solidification metal heat flux measurement device as shown in Figure 1, packet
Include sequential steps in detail below：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1600
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 7.5L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
Embodiment 3
Rapid solidification metal experiment is carried out using a kind of rapid solidification metal heat flux measurement device as shown in Figure 1, packet
Include sequential steps in detail below：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1650
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 7.5L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
By changing cooling water flow, keep other conditions constant, test cooldown rate conducts heat to rapid solidification
It influences, such as embodiment 4,5,6.
Embodiment 4
Rapid solidification metal experiment is carried out using a kind of rapid solidification metal heat flux measurement device as shown in Figure 1, packet
Include sequential steps in detail below：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1580
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 5L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
Embodiment 5
Rapid solidification metal experiment is carried out using a kind of rapid solidification metal heat flux measurement device as shown in Figure 1, packet
Include sequential steps in detail below：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1580
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 7.5L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
Embodiment 6
Rapid solidification metal experiment is carried out using a kind of rapid solidification metal heat flux measurement device as shown in Figure 1, packet
Include sequential steps in detail below：
1st, test button is melted
(1) it feeds：Protectiveness gas hood lid with sealing ring is opened, 3g steel sample is put into the bottom of quartz ampoule, will protect
Shield property gas hood lid is closed.
(2) it vacuumizes：Using pneumatic shuttle to the partial vacuum within package unit protectiveness gas hood to vacuum degree 10-25Pa, and inert protective gas Ar is filled with, its pressure is finally made to reach an atmospheric pressure.
(3) metal is melted：The sample of quartzy bottom of the tube is heated in induction coil energization, sets target temperature as 1580
DEG C, and specimen temperature is monitored in real time with pyrometer, stop heating upon reaching a predetermined temperature.
(4) impulse jet：The air inlet pipe accessed by quartz ampoule upper end is passed through inert gas, to molten metal drop reality
Now spray.
2nd, droplet solidification and data acquisition
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, cooling flow is adjusted
It measures as 10L/min.
(2) data acquire：Before drop is ejected into the copper substrate with water cooling plant data collecting system start with
The frequency of 150Hz starts data acquisition.
3rd, later data is handled
It is temperature value by the data that data collecting system obtains, droplet solidification heat in the process can be calculated by computer
The situation of change of stream.
Test parameter in embodiment 1-6 is summarized in table 1, and embodiment 1-3 is surveyed changes of heat flux trend and is plotted in figure
3, embodiment 4-6 surveys changes of heat flux trend and is plotted in Fig. 4, obtains heat of the steel sample in process of setting under different curing conditions
Flow variation tendency.
Steel sample in 1 embodiment 1-6 of table quickly solidifies the parameter list of hot-fluid
Embodiment above describes the basic principle and main feature and advantages of the present invention of the present invention, the technologies of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The concrete operating principle of invention, without departing from the spirit and scope of the present invention, the present invention also have various change and change
Into these changes and improvements all fall within the protetion scope of the claimed invention, and the claimed scope of the invention is by appended right
Claim and its equivalent thereof.
Claims (8)
1. a kind of rapid solidification metal heat flux measurement device, it is characterised in that：Including drop emission system, data collecting system and
Atmosphere control system；
The drop emission system includes one using electrically heated quartz ampoule (41), and quartz ampoule (41) bottom offers always
Diameter is less than the aperture of 0.5mm, and the top quartz ampoule of the aperture has installed around induction coil (42)；Quartz ampoule (41) inner cavity with
One air pressure component (43) connects, for pressurizeing to quartzy tube cavity；
The data collecting system includes being located at the pedestal (21) of quartzy bottom of the tube, and the pedestal (21) is internally provided with thermocouple
(23) and cooling component；
The drop emission system and data collecting system are arranged in the atmosphere protection room (31) of atmosphere control system, described
Air inlet pipe (33) and air outlet pipe (34) are respectively equipped on atmosphere protection room (31), is that can open at the top of the atmosphere protection room (31)
Protectiveness gas hood (35), the protectiveness gas hood (35) is covered in by pivoted frame (12) on atmosphere protection room (31), institute
Quartz ampoule (41) is stated to be connected on protectiveness gas hood (35) vertically.
2. a kind of rapid solidification metal heat flux measurement device according to claim 1, the air pressure component (43) connects for one
The air bag of air pump is connect, the air bag is connected by pipeline with quartz ampoule (41) inner cavity.
3. a kind of rapid solidification metal heat flux measurement device according to claim 1, the pedestal (21) is copper platform,
Be internally provided with cooling water circulation pipeline (22), the thermocouple (23), which is buried, to be overlayed on inside base platform, and with NI temperature acquisition moulds
Block connects.
4. a kind of rapid solidification metal heat flux measurement device according to claim 1, set on the atmosphere protection room (31)
There is observation window (32).
5. a kind of rapid solidification metal heat flux measurement device according to any one of claim 1-4, the quartz ampoule
(41) top is additionally provided with the pyrometer (44) of detection real time temperature.
6. a kind of test method of the rapid solidification metal heat flux measurement device of any one of claim 1-5, it is characterised in that
Include the following steps：
The first step, dress sample, quartzy bottom of the tube is put by 2-5g steel samples；
Second step vacuumizes, and atmosphere protection room is sealed, and inside then is evacuated to vacuum degree 10-15-10-25Pa, and be filled with
Inert protective gas finally makes atmosphere protection room pressure reach an atmospheric pressure；
Third step, fusing metal, carry out being heated to target melting temperature by induction coil to the steel sample of quartzy bottom of the tube；
4th step, impulse jet, open the cooling water pipeline of data collecting system, and it is 2.5- to control cooling water circulation flow
15L/min is passed through pulse inert gas by air pressure component to quartz ampoule inside, by pressure control melt molten steel drop from
Quartz ampoule is ejected on pedestal；
5th step, data acquire, and starting data by thermocouple with the frequency of 0-200Hz before the 4th step starts acquires, and one
Until molten steel drop completes cooled and solidified；
The temperature signal collected is calculated the situation of change of hot-fluid during droplet solidification by the 6th step, data processing.
7. a kind of test method of rapid solidification metal heat flux measurement device according to claim 6, during the test,
The temperature in quartz ampoule is monitored in real time by pyrometer, real time temperature is not less than target melting temperature before ensureing drop injection
Degree.
8. a kind of test method of rapid solidification metal heat flux measurement device according to claim 6, the steel sample is placed
3-4g, the indoor vacuum degree of atmosphere protection are 10-20-10-25Pa, cooling water circulation flow be 5-10L/min, data acquiring frequency
For 50-150Hz.
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| CN107671253B (en) * | 2017-09-30 | 2019-10-11 | 中南大学 | A kind of rapid solidification metal test substrate |
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