CN106872512A - A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid - Google Patents
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid Download PDFInfo
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- CN106872512A CN106872512A CN201611249037.3A CN201611249037A CN106872512A CN 106872512 A CN106872512 A CN 106872512A CN 201611249037 A CN201611249037 A CN 201611249037A CN 106872512 A CN106872512 A CN 106872512A
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Abstract
The present invention is a kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid,By being adjusted using vavuum pump and depth device for deoxidizing and controlling protective atmosphere,Heating fusing is carried out to metal material sample using induction coil,Again by pulse pressure controller to being passed through inert protective gas inside quartz glass tube,Metal drop is ejected into the upper surface of water cooling copper mold,And the changing pattern of metal drop process of setting is caught by high speed video camera real-time in-situ,While synchronous opening temperature data acquisition device,Gather and store to bury and overlay on cooling upper and lower two temperature of thermocouple in upright position in copper mold center,After treating that metal drop solidifies completely,Stop the work of high speed video camera and temperature collecting device,Then the analysis and conversion for being acquired information are calculated,So as to the Changing Pattern of hot-fluid in the image and process of setting that obtain reflection metal material solidification behavior.The present invention have it is simple to operate, good stability, testing cost is low, and detection efficiency is high, result is visual in image, and the degree of accuracy is high, the advantages of applied widely.
Description
Technical field
The present invention relates to a kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid, belong to metal material fast
Fast field shaping technique.
Background technology
In metallurgy industry, continuously casting technology has been universal, and particularly for steel-making, continuous casting is the leading side of steel-making
Method, for improve production efficiency, obtains bigger yield, and while slab quality is ensured, the pulling rate requirement to continuous casting is more next
Faster, particularly twin-roll thin strip continuous casting technology, pulling rate is high, it is desirable to which strand realizes the solidification of molten steel within the extremely short time, this
The individual time is short to only 0.2s-0.5s, that is to say, that molten steel needs to complete solidification with the cooldown rate being exceedingly fast, it means that
The heat flow of conduction is high in unit interval.The conduction of hot-fluid has extremely important influence on slab quality again, in order to improve
The quality of strand, it is necessary to reasonably control heat flow, therefore, test rapid solidification behavior and the process of setting of metal material
In heat flow seem particularly important.
During produce reality, rapid solidification behavior and heat flux measurement are carried out, will not only influence the stabilization of production suitable
OK, and to be limited to production equipment volume excessively huge, cause testing cost too high.Therefore, a kind of test metal material is invented
The method of rapid solidification behavior and solidification hot-fluid is particularly important such that it is able to disclose produce reality under laboratory conditions
During the behavior of metal material rapid solidification and heat transfer problem, with highly important theory significance and practical value.
At present, the Patents on metal material rapid solidification test device and method are rarely reported, and research is very
It is few, only to the measure device for determining device and freezing interface dynamic information of metal material solidification degree of supercooling.Patent 1
(CN104089972A) a kind of method and its device for determining metal droplet rapid solidification degree of supercooling is disclosed, first using pulse
MP method prepares metal microparticle drop；Then metal microparticle drop is determined on the diverse location in dropping process respectively to fall
Carved at the beginning of entering in oil and the balance moment temperature；Various location metal microparticle liquid is then obtained by heat Balance Calculation
The liquid content of drop, nucleation temperature and degree of supercooling.Patent 2 (CN248269lY) discloses boundary during a kind of rapid solidification metal
The measurement apparatus of face dynamic information, the measurement apparatus are preheated by pulse laser, lens group, light beam balanced device, sample, constant temperature
Device, digital constant-current source, digital oscilloscope, probe wave filter group are into the laser is started by computer controls, by lens
Group, light beam balanced device beat on the operating resistance of sample light beam, and constant temperature preheating device is placed under sample on sample stage, and numeral is permanent
Stream source provides constant current for measuring circuit, and sample both end voltage signal connects people's digital oscilloscope through wave filter of popping one's head in, then through meter
The treatment of calculation machine.Although the two patents have the advantage of uniqueness in terms of each self-test above, can not be molten to metal material
Drip the change behavior in fast process of setting and heat flow change is directly observed and tested.
The content of the invention
It is an object of the invention to provide a kind of new test metal material rapid solidification behavior and the side of solidification hot-fluid
Method, for probing into influence of the heat transfer to metal material rapid solidification whole process.The method is with conspicuous characteristics, with the obvious advantage, can be complete
The process of metal material molten drop rapid solidification, is with a wide range of applications during full reproduction produce reality, can be real for production
Border and academic scientific research provide reliable theoretical foundation and technical guarantee.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, the method for testing is to survey
Carried out in the steps below in examination equipment；
The test equipment includes：Metal material drop emission unit, cooling copper mold (18), temperature data samwpling unit,
Control climate unit, high-speed camera unit；
The metal material molten drop generating unit, including induction coil (2), quartz glass tube (3), gas pressure regulator (5)；
The induction coil (2) is wound on quartz glass tube (3), and quartz glass tube (3) bottom is provided with for liquid metal drippage
Hole；The gas pressure regulator (5) can produce pulser gas, and its pulser gas for producing can be blown into quartz glass tube (3)
It is interior；
Two thermocouples and cooling water recirculation system (17) are provided with cooling copper mold (18)；Two thermocouples point
First thermocouple (13), second thermocouple (14) are not calculated as；
The temperature data samwpling unit by first thermocouple (13), second thermocouple (14), thermometer (8) and
Temperature data collection device (10) is constituted, first thermocouple (13), second thermocouple (14), close temperature meter (8)
It is connected respectively at temperature data collection device (10)；The thermometer (8) is for measuring metal to be measured in quartz glass tube (3)
Constantly temperature；
The control climate unit includes gas flow controller (23), depth device for deoxidizing (22), partial pressure of oxygen probe
(19), protectiveness gas hood (6) and vavuum pump (15) composition being connected with protectiveness gas hood (6)；The gas flow controller
(23) it is arranged on the inlet end of depth device for deoxidizing (22)；The outlet side of depth device for deoxidizing (22) is by pipeline and protectiveness gas
The bottom for covering (6) is connected；Oxygen is additionally provided with pipeline between the outlet side of depth device for deoxidizing (22) and protectiveness gas hood (6)
Partial pressure pops one's head in (19)；
The high-speed camera unit is made up of high-speed camera camera head (20) and transparent camera window (21)；It is described
Bright shooting window (21) is arranged on protectiveness gas hood (6) side；And high-speed camera camera head (20) is by transparent camera window
(21) cooling copper mold upper surface can constantly be photographed；
When testing the behavior of metal material rapid solidification and solidification hot-fluid with the equipment, comprise the steps：
Step one
Metal material to be tested is put into the bottom of quartz glass tube (3)；Cover protectiveness gas hood (6)；Start vacuum
Pump (15) is vacuumized, and is then turned on depth device for deoxidizing (22) and is led to toward protectiveness gas hood (6) by depth device for deoxidizing (22)
Enter protective gas,
Step 2
The metal material sample of quartz glass tube (3) bottom is heated by induction coil (2), while using temperature
Meter (8) is monitored to the real time temperature of metal material, until real time temperature is higher than fusion temperature；
Step 3
Information data is gathered：After having regulated and controled cooling water circulation flow, open high speed video camera (20) and mix up Jiao, carry out
Realtime graphic catches and stores, and opens temperature data collection device (10), to the thermocouple measured temperature in cooling copper mold and
The temperature of thermometer (8) carries out record storage；
Step 4
Then by pulse pressure controller (5) to inert protective gas are passed through inside quartz glass tube (3), by metal material
Material molten drop is ejected into the center on cooling copper mold (18) surface from quartz glass tube (3), until the complete cooled and solidified of metal drop
It is synchronous afterwards to stop high-speed camera and temperature data acquisition；
Step 5
The image of high-speed camera record storage is recalled, in analysis of metallic materials molten drop rapid solidification not in the same time
Image just can intuitively reflect the solidification behavior of metal material, while the temperature data signal that will be collected is by turning
Change, so as to calculate the situation of change of hot-fluid during metal material droplet solidification.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, the quartz glass bottom of the tube
Bore dia be 0.2-1.0mm, preferably 0.4-0.8mm.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, in the test equipment, also
It is provided with metal material solidifying body buanch unit (12)；The metal material solidifying body buanch unit utilizes wedge by push rod controller
The stainless steel shovel of shape removes the metal material sample for having solidified.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, cooling copper mold (18) bottom
Portion is provided with lifting controller (16).
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, the protectiveness gas hood (6)
Interior setting heat insulation layer will cool down copper mold (18) and metal material molten drop generating unit and separate, and the heat insulation layer is provided with for liquid
Metal drops to the unique passage on cooling mould from metal material molten drop generating unit.So setting can prevent induction coil from adding
During hot sample, cooling copper mold surface is radiated heat into, be allowed to temperature rising, and then influence situations such as surveying the accuracy of data
Appearance.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, metal material to be tested is
The metal material of surface cleaning non-oxidation layer；Its quality is 2.0-8.0g；
The hole of quartz glass tube (2) bottom to cooling copper mold (18) upper surface distance be 3.0-6.0cm.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, (19) are popped one's head in by partial pressure of oxygen
Partial pressure of oxygen PO in control protectiveness gas hood (6)2For:10-16-10-22Pa。
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, induction coil (2) and quartz
Gap between glass tube is 1.0-2.0mm, and its maximum heating temperature is 180O DEG C.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, during collecting temperature data, control
But water circular flow is 1.0L/min-10.0L/min to refrigeration；Control high speed video camera (20) and temperature data collection device
(10) it is synchronous to open；And high-speed camera frequency acquisition is more than or equal to the frequency acquisition of temperature data, high-speed camera frequency acquisition
It it is 200-400 frames/second, temperature acquisition frequency is 100-200Hz.High speed video camera (20) and temperature data collection device (10)
Synchronous unlatching, so as to the corresponding relation of the solidification behavior of metal and heat output in a certain moment process of setting of post analysis；
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, protectiveness gas hood (6) are entered
Gas port and gas outlet are set to skew symmetry one on the other, and air inlet is arranged on atmosphere protection room left side lower section, and gas outlet is arranged on
Atmosphere protection room right side top.Gas circulation dead band is prevented, is conducive to stability contorting atmosphere.
A kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid of the present invention, pulse pressure controller is to stone
English glass tube is passed through the Ar or N that inert protective gas are purity 99.999%2。
In the present invention, push rod controller is opened, control wedge-shaped stainless steel shovel by the metal drop of cooled and solidified from cooling copper
Mould surface is removed, and then changes other experiment conditions, such as protective atmosphere, droplet temperature, cooling water flow, injection air pressure
Deng, then repeated since above-mentioned steps four, continue to determine the solidification behavior of next metal material molten drop and solidification hot-fluid, until
Complete the measurement of experiment.
In the present invention, the metal material surface that will be tested carries out polishing light, is then cut into suitable size bulk,
Quartz glass bottom of the tube is put into after weighing, while regulating the height of cooling copper mold and the position of wedge-shaped stainless steel shovel, and is covered
Good protectiveness gas hood is sealed.
In the present invention, during test, the pressure in protectiveness gas hood (6) is an atmospheric pressure.
In the present invention, power controller (1) is opened, the metal material sample of quartzy bottom of the tube is carried out by induction coil
Heating, while the real time temperature of metal material is monitored using microthermometer, until real time temperature is higher than fusion temperature.
The present invention provides a kind of method for testing the behavior of metal material rapid solidification and solidification hot-fluid, is capable of achieving metal material
The change of heat flow in the observation of drop rapid solidification behavior and measurement process of setting.The present invention mainly has the advantage that：
1) it is simple to operate.This method is mainly adjusted and set by controlling switch, and operating process is simple, user
Just.
2) degree of accuracy is high.The present invention directly carries out thermometric using armoured K-thermocouple, and using frequency continuously adjustable
Temperature collecting device is acquired, and measurement is accurate, timely, high by calculating the hot-fluid degree of accuracy.
3) result is visual in image.This method is capable of the solidification of real-time in-situ ground seizure molten drop using high speed video camera
Journey, can characterize corresponding solidification behavior by intercepting video image, both image, and intuitively, it is very clear.
4) testing cost is low.The present invention can realizing the test of laboratory scale metal material solidification behavior and hot-fluid, from
And the direct test in industrial production is substituted, and normal production is not influenceed, while consumption is small, testing cost is low.
5) testing efficiency is high.As a result of metal material solidifying body transfer device, thus can once vacuumize
Under the conditions of, just complete the measurement of multiple metal material molten drops.
6) it is applied widely.This method is heated using induction coil, and heating-up temperature may be up to 1800 DEG C, far above general gold
The fusion temperature of category and metal based alloys material, thus have a wide range of application.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Brief description of the drawings
Fig. 1 is the structural representation for testing the behavior of metal material rapid solidification and solidification heat flow system.
Label in figure：
1- power controllers, 2- induction coils, 3- high quartz glass tubes, heat-insulating material 5- pulse airs of the 4- with passage
Pressure controller, 6- protectiveness gas hoods, 7- activity rotary columns, 8- microthermometers, 9- atmosphere protection chamber bodies, 10- frequency acquisitions can
The temperature collecting device of tune, 11- push rod controllers, the stainless steel shovel of 12- wedge shapes, first thermocouple in 13- copper molds, 14- copper molds
Interior second thermocouple, 15- vavuum pumps, 16- lifting controllers, 17- cooling water recirculation systems, 18- cooling copper molds, 19- oxygen is passed
Sensor, 20- high speed video cameras, 21- clear glass windows, 22- depth device for deoxidizing, 23- gas flow controllers,
Fig. 2 is the solidification of molten steel sample on the copper mold surface that the high speed camera head of embodiment 1 is photographed.
Fig. 3 is by surveying solidification of molten steel hot-fluid chart in embodiment 1.Abscissa is the time, and unit is the second, and ordinate is heat
Stream, unit is MW/m2。
Fig. 4 is the solidification of molten steel sample on the copper mold surface that the high speed camera head of embodiment 2 is photographed.
Fig. 5 is by surveying solidification of molten steel hot-fluid chart in embodiment 2.Abscissa is the time, and unit is the second, and ordinate is heat
Stream, unit is MW/m2。
Specific embodiment
With reference to example, the behavior of metal material rapid solidification and the test of solidification hot-fluid are carried out with the inventive method,
So as to illustrate the feasibility and science of the method.
Example 1：As a example by testing nonmagnetic steel, measure is comprised the following steps that：
1st, the acquisition of metal drop
(1) feed：Protectiveness gas hood lid is opened, 5g steel sample is put into the bottom of quartz ampoule, aperture is 0.5mm, will be protected
Shield property gas hood lid is closed.
(2) vacuumize：Package unit is vacuumized 30 minutes using vavuum pump, and be filled with protective gas, partial pressure of oxygen：
PO2=10-18, its pressure is reached an atmospheric pressure.
(3) fusing metal：Regulation power controller, is heated by induction coil to the steel sample of quartzy bottom of the tube, if
The temperature that sets the goal is 1550 DEG C, and stops heating upon reaching a predetermined temperature to steel sample temperature the real time measure with microthermometer.
2nd, injection molten drop and gathered data
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, regulation cooling current
It is 10L/min to measure.
(2) data acquisition：Opening high speed video camera carries out shooting record, and seizure frequency is 200 frames/second, and is synchronously beaten
Temperature sampler is opened, with 200HZFrequency collection temperature data；
(3) metal injection：By pulse pressure controller to being passed through high-purity 99.99% protective gas inside quartz glass tube
N2, metal material molten drop is ejected into the center on cooling copper mold surface from quartz glass tube, until metal drop is cooled down completely
Stop temperature acquisition and high-speed camera after solidification；
3rd, Data Analysis Services
(1) video that high-speed camera was photographed is used into software processing, captures the image in the real-time process of setting of molten steel, with
This solidification behavior to reflect molten steel.The video photographed when current molten steel is close to solidification completely is as shown in Figure 2.
(2) temperature data that will be collected simultaneously, the change feelings of hot-fluid during droplet solidification are calculated by computer
Condition.Changes of heat flux during current solidification of molten steel is as shown in Figure 3.
Example 2：As a example by testing ferroalloy, measure is comprised the following steps that：
1st, the acquisition of metal drop
(1) feed：Protectiveness gas hood lid is opened, 8g steel sample is put into the bottom of quartz ampoule, aperture is 0.7mm, will be protected
Shield property gas hood lid is closed.
(2) vacuumize：Package unit is vacuumized 45 minutes using vavuum pump, and be filled with protective gas, partial pressure of oxygen：
PO2=10-20, its pressure is reached an atmospheric pressure.
(3) fusing metal：Regulation power controller, is heated by induction coil to the steel sample of quartzy bottom of the tube, if
The temperature that sets the goal is 1600 DEG C, and stops heating upon reaching a predetermined temperature to steel sample temperature the real time measure with microthermometer.
2nd, injection molten drop and gathered data
(1) cooling water is opened：In the valve of the front opening cooling water recirculation system of drop impulse jet, regulation cooling current
It is 5.0L/min to measure.
(2) data acquisition：Opening high speed video camera carries out shooting record, and seizure frequency is 400 frames/second, and is synchronously beaten
Temperature sampler is opened, with 100HZFrequency collection temperature data；
(3) metal injection：By pulse pressure controller to being passed through high-purity 99.99% protective gas inside quartz glass tube
Ar, metal material molten drop is ejected into the center on cooling copper mold surface from quartz glass tube, until metal drop is cooled down completely
Stop temperature acquisition and high-speed camera after solidification；
3rd, Data Analysis Services
(1) video that high-speed camera was photographed is used into software processing, captures the image in the real-time process of setting of molten steel, with
This solidification behavior to reflect molten steel.The video photographed when current molten steel is close to solidification completely is as shown in Figure 4.
(2) temperature data that will be collected simultaneously, the change feelings of hot-fluid during droplet solidification are calculated by computer
Condition.Changes of heat flux during current solidification of molten steel is as shown in Figure 5.
Claims (10)
1. it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, it is characterised in that；The method of testing is
Carried out in the steps below in test equipment；
The test equipment includes：Metal material drop emission unit, cooling copper mold (18), temperature data samwpling unit, atmosphere
Control unit, high-speed camera unit；
The metal material molten drop generating unit, including induction coil (2), quartz glass tube (3), gas pressure regulator (5)；It is described
Induction coil (2) is wound on quartz glass tube (3), and quartz glass tube (3) bottom is provided with the hole for liquid metal drippage；
The gas pressure regulator (5) can produce pulser gas, and its pulser gas for producing can be blown into quartz glass tube (3)；
Two thermocouples and cooling water recirculation system (17) are provided with cooling copper mold (18)；Two thermocouples are counted respectively
It is first thermocouple (13), second thermocouple (14)；
The temperature data samwpling unit is by first thermocouple (13), second thermocouple (14), thermometer (8) and temperature
Transacter (10) is constituted, and first thermocouple (13), second thermocouple (14), close temperature meter (8) are respectively
It is connected in temperature data collection device (10)；The thermometer (8) is for measuring the real-time of metal to be measured in quartz glass tube (3)
Temperature；
The control climate unit includes gas flow controller (23), depth device for deoxidizing (22), partial pressure of oxygen probe (19), guarantor
Shield property gas hood (6) and vavuum pump (15) composition being connected with protectiveness gas hood (6)；The gas flow controller (23) is set
In the inlet end of depth device for deoxidizing (22)；The outlet side of depth device for deoxidizing (22) is by pipeline and protectiveness gas hood (6)
Bottom is connected；Partial pressure of oxygen spy is additionally provided with pipeline between the outlet side of depth device for deoxidizing (22) and protectiveness gas hood (6)
Head (19)；
The high-speed camera unit is made up of high speed video camera (20) and transparent camera window (21)；The transparent camera window
Mouth (21) is arranged on protectiveness gas hood (6) side；And high speed video camera (20) can be clapped in real time by transparent camera window (21)
Take the photograph cooling copper mold upper surface；
When testing the behavior of metal material rapid solidification and solidification hot-fluid with the equipment, comprise the steps：
Step one
Metal material to be tested is put into the bottom of quartz glass tube (3)；Cover protectiveness gas hood (6)；Start vavuum pump
(15) vacuumize, be then turned on depth device for deoxidizing (22) and be passed through toward protectiveness gas hood (6) by depth device for deoxidizing (22)
Protective gas,
Step 2
The metal material sample of quartz glass tube (3) bottom is heated by induction coil (2), while using thermometer
(8) real time temperature to metal material is monitored, until real time temperature is higher than fusion temperature；
Step 3
Information data is gathered：After having regulated and controled cooling water circulation flow, open high speed video camera (20) and mix up Jiao, carry out in real time
Picture catching and storage, and temperature data collection device (10) is opened, to thermocouple measured temperature and temperature in cooling copper mold
The temperature for counting (8) carries out record storage；
Step 4
Then metal material is melted to inert protective gas are passed through inside quartz glass tube (3) by pulse pressure controller (5)
The center that cooling copper mold (18) surface is ejected into from quartz glass tube (3) is dripped, until same after the complete cooled and solidified of metal drop
Step stops high-speed camera and temperature data acquisition；
Step 5
The image of high-speed camera record storage is recalled, the image in analysis of metallic materials molten drop rapid solidification not in the same time
Just can intuitively reflect the solidification behavior of metal material, while the temperature data signal that will be collected is by changing, from
And calculate the situation of change of hot-fluid during metal material droplet solidification.
2. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：The bore dia of the quartz glass bottom of the tube is 0.2-1.0mm.
3. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：In the test equipment, metal material solidifying body buanch unit (12) is additionally provided with；The metal material solidifying body transfer is single
Unit removes the metal material sample for having solidified using wedge-shaped stainless steel shovel by push rod controller.
4. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：Described cooling copper mold (18) bottom is provided with lifting controller (16).
5. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：Set heat insulation layer in the protectiveness gas hood (6) to separate cooling copper mold (18) and metal material molten drop generating unit, institute
State heat insulation layer and be provided with the unique passage dropped to from metal material molten drop generating unit for liquid metal on cooling mould.
6. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：
Metal material to be tested is the metal material of surface cleaning non-oxidation layer；Its quality is 2.0-8.0g；
The hole of quartz glass tube (2) bottom to cooling copper mold (18) upper surface distance be 3.0-6.0cm.
7. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：Partial pressure of oxygen PO in protectiveness gas hood (6) is controlled by partial pressure of oxygen probe (19)2For:10-16-10-22Pa。
8. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：Gap of the induction coil (2) and quartz glass tube between is 1.0-2.0mm, and its maximum heating temperature is 1800 DEG C.
9. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：
During collecting temperature data, it is 1.0L/min-10.0L/min to control cooling water circulation flow；Control high speed video camera
(20) synchronously opened with temperature data collection device (10)；And high-speed camera frequency acquisition is more than or equal to the collection of temperature data
Frequency, high-speed camera frequency acquisition is 200-400 frames/second, and temperature acquisition frequency is 100-200Hz.
10. it is according to claim 1 it is a kind of test the behavior of metal material rapid solidification and solidification hot-fluid method, its feature
It is：The air inlet of protectiveness gas hood (6) and gas outlet are set to skew symmetry one on the other, and air inlet is arranged on atmosphere protection room
Left side lower section, gas outlet is arranged on atmosphere protection room right side top.
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| CN116399899A (en) * | 2023-06-08 | 2023-07-07 | 中南大学 | Molten drop sub-fast solidification high-flux test substrate and use method thereof |
| CN116399899B (en) * | 2023-06-08 | 2023-08-29 | 中南大学 | Molten drop sub-fast solidification high-flux test substrate and use method thereof |
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