CN110423871A - A kind of heating of variable frequency induction and cooling device - Google Patents
A kind of heating of variable frequency induction and cooling device Download PDFInfo
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- CN110423871A CN110423871A CN201910822276.0A CN201910822276A CN110423871A CN 110423871 A CN110423871 A CN 110423871A CN 201910822276 A CN201910822276 A CN 201910822276A CN 110423871 A CN110423871 A CN 110423871A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of heating of variable frequency induction and cooling devices.The device includes furnace body, switchable type variable-frequency power sources, fire door, air valve, thermocouple, coil, thermal-insulating body, graphite electrode, Al2O3Crucible, water cooling collet；Furnace body can provide high vacuum or inert gas shielding environment；Switchable type variable-frequency power sources is connect with coil, it is possible to provide work/medium/high frequency power and the pulse power；High frequency electric source makes graphite electrode generate heat, to heat test button to melting, later, can switch to work/intermediate frequency or the pulse power, carries out Electromagnetic Treatment to the process of setting of sample.In addition, openable air valve is quickly filled with cryogenic inert gas from bottom of furnace body, quenches to sample in any moment of sample solidification, obtain under different cooling speed, under the conditions of different magnetic field, the test button of the different growthforms of different moments.The invention energy Flashmelt metal and the process of setting for being used to study continuous casting billet, ingot casting.
Description
Technical field
The present invention relates to metal freezings technical fields such as casting and continuous castings, especially a kind of variable frequency induction heating and cooling dress
It sets.
Background technique
Continuous casting is the mainstream production technology of current metallurgical industry.China's continuous casting the 1980s starts high speed and sends out
Exhibition, national continuous casting steel billet yield is more than 1,000,000,000 tons within 2018, and continuous casting ratio is more than 99%.Research about continuous casting billet solidification processing is
One global problem.Continuous casting billet not only has the characteristics that the shared of the metal solidification processes such as high temperature, opaque, but also due to being big
Technical scale production makes the experimental study for pouring out the current comparative maturity such as method, thermal analysis system, intuitive observation and physical Modeling Method
Method all encounters difficulty.
Shanghai University " continuous casting billet solidified structure physical simulating method and device " (China Patent Publication No.:
CN101075287), by way of the control degree of superheat and cold end water flow and crucible rotation, analog continuous casting billet orientation is solidifying
Gu tissue studies influence of the technological parameter to solidified structure." the analogy method of horizontal growth process of solidification structure of Shanghai University
And device " (China Patent Publication No.: CN101722291A), pass through overturning casting, control liquidus temperature and cold end water flow in situ
Amount, can simulate continuous casting billet horizontal growth process of solidification structure.But there are two for the molten steel mode of above-mentioned two thermal cycle simulation
A defect, one is being all made of resistance heating, the heating method efficiency is slow, and because of calandria distribution and the limitation of size,
Lead to furnace body enormous size, space application rate is low；Secondly above-mentioned stream oriented device does not introduce disturbance of the magnetic field to molten metal bath, no
Influence of the magnetic field to metal solidification process can be studied.However, existing research show the interference in magnetic field to the form of production of crystal grain with
And component distributing has a significant impact.It is contemplated by the invention that variable frequency induction heating and cooling device, using variable frequency induction heat side
Formula, by adjusting alternating current form of the load on coil, can be realized using set of device melting to test button and
Disturbance of magnetic field processing, and sample is quenched using the method for being quickly passed through cryogenic inert gas, by the space utilization of device
Rate greatly promotes, to improve conventional efficient, accuracy and the flexibility of such experiment.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes that one kind answers frequency conversion induction heating and cooling device, pass through adjusting
The alternating current form on coil is loaded, is realized to the Electromagnetic Treatment in the melting of test button and process of setting；Using logical
The mode for entering cryogenic inert gas quenches test button after melt process.To which the device can realize test button
Thawing, the control of process of setting, the disturbance of electromagnetic field and the quenching of cryogenic gas.The device can be used for studying the heat of continuous casting billet
Simulation, but not limited to this.Also, compare existing Hot Charging of Continuous Casting Slab simulation heating device, the conventional efficient of apparatus of the present invention, standard
True property and space utilization rate are above existing apparatus.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: a kind of variable frequency induction heating
And cooling device, the device include thermocouple (1), the first air valve (2), furnace body (3), coil (4), thermal-insulating body (5), fire door
(6), water cooling collet (7), the second air valve (8), Al2O3 crucible (9), graphite electrode (11), switchable type variable-frequency power sources, the line
Circle (4) is connect with the switchable type variable-frequency power sources on the outside of furnace body (3), for providing work/medium/high frequency alternating current and pulse electricity
Stream, the fire door (6) are located at the right side of furnace body (3)；
First air valve (2) and the second air valve (8) are located at furnace body (3) upper left side and lower right side, first gas
Valve (2) and the second air valve (8) are controlled the vacuum that can be used for extracting furnace body (3) to be rapidly opened and closed by electromagnetic switch and to furnaces
Cryogenic inert gas is filled in body (3)；
The coil (4), thermal-insulating body (5), graphite electrode (11) and Al2O3 crucible (9) are set to the furnace chamber of furnace body (3)
It is interior；
The water cooling collet (7) passes through and fixes on fire door (6), and one end is connect with Al2O3 crucible (9), the other end with
The connection of recirculated water cold, the size of the water flow by water cooling collet (7) is accurately controlled by recirculated water cold, to control institute
State axial radiating rate of the test button in temperature-fall period；
The Al2O3 crucible (9) is a hollow cuboid, and test button (10) is placed in Al2O3 crucible (9)；
The internal upper and lower surface of thermal-insulating body (5) is provided with graphite electrode (11), coil (4) enclose cover thermal-insulating body (5) outside
Portion, the Al2O3 crucible (9) connecting with water cooling collet (7) pass through the hole on the right side of stereoscopic heat-insulating cabinet (5) vacantly in thermal-insulating body
(5) internal；
The graphite electrode (11), thermal-insulating body (5) and coil (4) are integrally as in test button (10) melting process
Heating and thermal insulation component, and thermal-insulating body (5) is connect with the Machinery Control System in furnace body (3), which can control
Graphite electrode (11), thermal-insulating body (5) and coil (4) processed are whole mobile to furnace body (3) left side with certain speed；
The effect of above-mentioned setting Machinery Control System is heating and thermal insulation after test button (10) melts in crucible (9)
Component can be moved to the left by certain speed, be gradually distance from crucible (9), to control the test button in Al2O3 crucible (9)
(10) process of setting realizes the thermal simulation process of continuous casting billet, and it is lazy in any moment of process of setting can be all passed through low temperature
Property gas, is quenched, studies the solidified structure and Elemental redistribution at solidification moment；
Moreover, it is also possible to heating and thermal insulation component is quickly moved to the left by Machinery Control System, so that Al2O3 crucible
(9) after completely disengaging thermal-insulating body (5), the test button (10) in Al2O3 crucible (9) is in vacuum and/or cryogenic inert gas
In solidified；
In addition it is also possible to do not move heating and thermal insulation component, make test button (10) in Al2O3 crucible (9) vacuum and/
Or it is solidified in cryogenic inert gas.
The thermocouple (1) is embedded in the thermal-insulating body (5), intracavitary for thermal-insulating body (5) described in synchro measure
Temperature；
The coil (4), thermal-insulating body (5), graphite electrode (11), Al2O3 crucible (9) and water cooling collet (7) are coaxial.
Further, the coil (4) is connected by coaxial cable with switchable type variable-frequency power sources, and in coaxial cable
It is connected with cooling water；When being passed through high-frequency current in coil (4), graphite electrode (11) induction fever melts test button (10)；
, it can be achieved that electromagnetic distu in test button (10) process of setting when being passed through work/electric current of intermediate frequency, pulse current in the coil (4),
For studying influence of the electromagnetic action to process of setting；First air valve (2) and the second air valve (8), which are recycled, to be rapidly passed through
Cryogenic inert gas, for being quenched to the test button (10) in solidification, to study the life of the test button (10)
The problems such as long form, Elemental redistribution.
Further, test button (10) size is 10cm × 1cm × 1cm；The size of the Al2O3 crucible (9)
For 12cm × 1.2cm × 2cm, wall thickness 1.5mm；The interior diameter of the graphite electrode (11) is 10cm, overall diameter 13cm, height
For 14cm；Thermal-insulating body (5) overall diameter is 23cm, a height of 24cm；Coil (4) interior diameter is 23cm, and outer diameter is
26cm, a height of 15cm；The furnace body interior diameter is 40cm, wall thickness 2cm, a height of 45cm.
Further, the water cooling collet (7) is made of fixture and cooling water pipeline, and fixture is held on crucible, cooling
Waterpipe passes through fire door and is fixed on fire door to be connected with recirculated water cold.During heating, cooling water is cooling by fixture,
It can guarantee the intensity of fixture, to fix crucible well；In test button (10) process of setting, pass through the cold of water cooling collet
But, it can be achieved that axial heat dissipation of the test button in process of setting.Meanwhile external recirculated water cooling machine can be controlled accurately
It is passed through the size of water flow in water cooling collet (7), controls the speed axially to radiate.
Further, first air valve (2) and the external cryogenic gas device of the second air valve (8), can be to the frequency conversion
Induction heating and cooling device circulation are filled with cryogenic inert gas, and air temperature ranges are 0-10 DEG C, gas flow magnitude range
For 0.1-0.2m3/s.
Further, the variable frequency induction heating and cooling device further include data signal acquisition control system, and being used for will
Temperature that the thermocouple (1), switchable type variable-frequency power sources, recirculated water cold and the first air valve (2), the second air valve (8) obtain,
The size of current and frequency of output, cooling water inflow and gas traffic transformation are data information and whole process is acquired storage, described
The frequency acquisition that data-signal controls acquisition system is 100Hz.
Further, the maximum heating temperature of the variable frequency induction heating and cooling device is 2000 DEG C；Temperature rate
Range is 0.01-100K/s；It goes up and down control temp error and is less than ± 2k；Cold conditions final vacuum is 6.67 × 10-3Pa.
Further, the power frequency being passed through in the coil (4) is 2-50KHz.
Further, the cooling water flow of the water cooling collet (7) is 0.2L/min -10L/min.
The utility model has the advantages that compared with prior art, technical solution of the present invention has following advantageous effects:
The present invention provides a kind of heating of variable frequency induction and cooling devices, test button are melted, magnetic field is to metal freezing
The influence of process, process of setting control, the research of institutional framework and component distributing combines together in process of setting.By to coil
High-frequency alternating power supply is loaded, makes graphite electrode induction fever, test button is melted, and test and be in high vacuum environment, improved
The accuracy of metal melt process；During metal freezing, air valve can be opened at any time as needed, it is lazy to be quickly passed through low temperature
Property gas, realize it is a certain solidification the moment quenching treatment, retain the solidified structure at solidification moment；In addition, can be online by load
High-frequency current on circle switches to work/electric current of intermediate frequency or pulse current, realizes interference of the magnetic field to metal solidification process, research is not
Influence with magnetic field to molten metal solidified structure；Furthermore heating and thermal insulation component can be mobile by certain speed, controls process of setting,
To realize the thermal simulation of continuous casting billet.In addition, the device can be substantially reduced the volume of heating chamber, space utilization rate is improved,
The uniform heating chamber of temperature is obtained, experiment accuracy is improved.
Detailed description of the invention
Fig. 1 is variable frequency induction of the present invention heating and cooling device structural schematic diagram；
Wherein, figure label are as follows: thermocouple (1), the first air valve (2), furnace body (3), coil (4), thermal-insulating body (5), furnace
Door (6), water cooling collet (7), the second air valve (8), crucible (9), test button (10), graphite electrode (11).
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of heating of variable frequency induction and cooling devices, test button are melted, magnetic field is to metal freezing
The influence of process, process of setting control, the research of institutional framework and component distributing combines together in process of setting.By to coil
High-frequency alternating power supply is loaded, makes graphite electrode induction fever, test button is melted, and test and be in high vacuum environment, improved
The accuracy of metal melt process；During metal freezing, air valve can be opened at any time as needed, it is lazy to be quickly passed through low temperature
Property gas, realize it is a certain solidification the moment quenching treatment, retain the solidified structure at solidification moment；In addition, can be online by load
High-frequency current on circle switches to work/electric current of intermediate frequency or pulse current, realizes interference of the magnetic field to metal solidification process, research is not
Influence with magnetic field to molten metal solidified structure；Furthermore heating and thermal insulation component can be mobile by certain speed, controls process of setting,
To realize the thermal simulation process of continuous casting billet.In addition, the device can be substantially reduced the volume of heating chamber, space utilization is improved
Rate obtains the uniform heating chamber of temperature, improves experiment accuracy.To enable the above objects, features and advantages of the present invention
More obvious and easy to understand, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
The variable frequency induction heating of the present invention of the position Fig. 1 and cooling device structural schematic diagram.As shown in Figure 1, proposed by the present invention one
The heating of kind variable frequency induction and cooling device, the device include thermocouple (1), the first air valve (2), furnace body (3), coil (4), heat preservation
Cabinet (5), fire door (6), water cooling collet (7), the second air valve (8), Al2O3 crucible (9), graphite electrode (11), switchable type become
Frequency power (12), the coil (4) connect with the switchable type variable-frequency power sources on the outside of furnace body (3) (12) connection, for provide work/
Medium/high frequency alternating current and pulse current, the fire door (6) are located at the right side of furnace body (3), wherein high frequency: greater than 10kHz,
Intermediate frequency: 1-10kHz, power frequency: 50-60Hz；
First air valve (2) and the second air valve (8) are located at furnace body (3) upper left side and lower right side, first gas
Valve (2) and second (8) can be controlled the vacuum that can be used for extracting furnace body (3) to be rapidly opened and closed by electromagnetic switch and to furnace bodies
(3) it is filled with cryogenic inert gas；
The coil (4), thermal-insulating body (5), graphite electrode (11) and Al2O3 crucible (9) are set to the furnace chamber of furnace body (3)
It is interior；
The water cooling collet (7) passes through and fixes on fire door (6), and one end is connect with Al2O3 crucible (9), the other end with
The connection of recirculated water cold, the size of the water flow by water cooling collet (7) is accurately controlled by recirculated water cold, to control institute
State axial radiating rate of the test button in temperature-fall period；
The Al2O3 crucible (9) is a hollow cuboid, and test button (10) is placed in Al2O3 crucible (9)；
The internal upper and lower ends of thermal-insulating body (5) are provided with graphite electrode (11), coil (4) enclose cover thermal-insulating body (5) outside
Portion, the Al2O3 crucible (9) connecting with water cooling collet (7) pass through the hole on the right side of thermal-insulating body (5) vacantly in stereoscopic heat-insulating cabinet
(5) internal；
The graphite electrode (11), stereoscopic heat-insulating cabinet (5) and coil (4) integrally melted as test button (10)
Heating and thermal insulation component in journey, and thermal-insulating body (5) is connect with the Machinery Control System in furnace body (3), and which can
It is whole mobile to furnace body (3) left side with certain speed to control graphite electrode (11), thermal-insulating body (5) and coil (4)；
The effect of above-mentioned setting Machinery Control System is heating and thermal insulation after test button (10) melts in crucible (9)
Component can be moved to the left by certain speed, be gradually distance from crucible (9), to control the test button in Al2O3 crucible (9)
(10) process of setting realizes the thermal simulation process of continuous casting billet, and it is lazy in any moment of process of setting can be all passed through low temperature
Property gas, is quenched, studies the solidified structure and Elemental redistribution at solidification moment；
Moreover, it is also possible to heating and thermal insulation component is quickly moved to the left by Machinery Control System, so that Al2O3 crucible
(9) after completely disengaging thermal-insulating body (5), so that the test button (10) in Al2O3 crucible (9) is in vacuum or cryogenic inert gas
It is solidified in body；
In addition it is also possible to not move heating and thermal insulation component, make the test button (10) in Al2O3 crucible (9) in incubator
Solidification in body (5).
The thermocouple (1) is embedded in the thermal-insulating body (5), intracavitary for thermal-insulating body (5) described in synchro measure
Temperature；
The coil (4), thermal-insulating body (5), graphite electrode (11), Al2O3 crucible (9) and water cooling collet (7) are coaxial.
Further, the coil (4) is connected by coaxial cable with switchable type variable-frequency power sources, and in coaxial cable
It is connected with cooling water；When being passed through high-frequency current in coil (4), graphite electrode (11) induction fever melts test button (10)；
, it can be achieved that electromagnetic distu in test button (10) process of setting when being passed through work/electric current of intermediate frequency, pulse current in the coil (4),
For studying influence of the electromagnetic action to process of setting；First air valve (2) and the second air valve (8), which are recycled, to be rapidly passed through
Cryogenic inert gas, for being quenched to the test button (10) in solidification, to study the life of the test button (10)
The problems such as long form, Elemental redistribution.
Further, test button (10) size is 10cm × 1cm × 1cm；The size of the Al2O3 crucible (9)
For 12cm × 1.2cm × 2cm, wall thickness 1.5mm；The interior diameter of the graphite electrode (11) is 10cm, and overall diameter is φ 13cm,
A height of 14cm；Thermal-insulating body (5) overall diameter is 23cm, a height of 24cm；Coil (4) interior diameter is 23cm, and outer diameter is
26cm, a height of 15cm；The furnace body interior diameter is 40cm, wall thickness 2cm, a height of 45cm.
The water cooling collet (7) is made of fixture and cooling water pipeline, and fixture is held on crucible, and cooling water pipeline passes through
Fire door and being fixed on fire door is connected with recirculated water cold.During heating, cooling water is cooling by fixture, it is ensured that fixture
Intensity, thus well fix crucible；In test button (10) process of setting, by the cooling of water cooling collet, it can be achieved that
Axial heat dissipation of the test button in process of setting.Meanwhile external recirculated water cooling machine can be controlled accurately and be passed through water cooling
The size of water flow in collet (7) controls the speed axially to radiate.
First air valve (2) and the external cryogenic gas device of the second air valve (8), can to the variable frequency induction heat and
Cooling device is filled with cryogenic inert gas, and air temperature ranges are 0-10 DEG C, and gas flow magnitude range is 0.1-0.2m3/s.
The variable frequency induction heating and cooling device further include data signal acquisition control system, are used for the thermocouple
(1), switchable type variable-frequency power sources, recirculated water cold and the first air valve (2), the temperature that the second air valve (8) obtains, output electric current
Size and frequency, cooling water inflow and gas traffic transformation are data information and whole process is acquired storage, the data-signal control
The frequency acquisition of acquisition system processed is 100Hz.
The maximum heating temperature of the variable frequency induction heating and cooling device is 2000 DEG C；Temperature rate range is
0.01-100K/s；It goes up and down control temp error and is less than ± 2k；Cold conditions final vacuum is 6.67 × 10-3Pa.
The power frequency being passed through in the coil (4) is 2-50KHz.
The cooling water flow of the water cooling collet (7) is 0.2L/min -10L/min.
Embodiment 1
The present embodiment using two phase stainless steel as experimental material, i.e., test button be two-phase stainless steel sample, come illustrate without
The sample making process of disturbance of magnetic field processing.
(1) Al2O3 crucible and test button are washed down with dehydrated alcohol and dried up；
(2) fire door is opened, by diagram installation sample, crucible and water cooling collet, guarantees the coaxial relation between three；
(3) vacuum will be extracted in furnace body；
(4) switchable type variable-frequency power sources is switched into high current mode, experiment starts, and reaches 1500 DEG C to chamber temp
Afterwards, 5min is kept the temperature, test button is allowed sufficiently to melt；
(5) after treatment disconnects power supply；
(6) air valve is opened, cryogenic inert gas is filled with from lower end air valve, is flowed out from upper end air valve, is realized gas circulation, is filled
Angle of incidence 20s realizes the quenching to test button；
(7) quenched sample can be used to observation growth morphology and detection elements point by dissection, grinding and polishing and corrosion
Cloth.
Embodiment 2
The present embodiment is using GCr15 bearing steel as experimental material, i.e., test button is GCr15 bearing steel sample, to illustrate to pass through
The sample making process of medium-frequency pulse disturbance of magnetic field processing.
(1) Al2O3 crucible and test button are washed down with dehydrated alcohol and dried up；
(2) fire door is opened, by diagram installation sample, crucible and water cooling collet, guarantees the coaxial relation between three；
(3) vacuum will be extracted in furnace body；
(4) switchable type variable-frequency power sources is switched into high frequency alternating current mode, opens power supply experiment and start, to chamber temperature
After degree reaches 1600 DEG C, 5min is kept the temperature, test button is allowed sufficiently to melt；
(5) the power supply output of switchable type variable-frequency power sources is switched into medium-frequency pulse magnetic field model, to molten metal sample
Disturbance treatment is carried out, time 15s is handled；
(6) after treatment disconnects power supply；
(7) air valve is then opened, cryogenic inert gas is filled with from lower end air valve, is flowed out from upper end air valve, realizes that gas follows
Ring is filled with time 20s, realizes the quenching to test button；
(8) quenched sample can be used to observation growth morphology and detection elements be distributed by dissection, grinding and polishing and corrosion
Deng.
Embodiment 3
The present embodiment using GCr15 bearing steel as experimental material, i.e., test button be GCr15 bearing steel sample, for oolemma
The Hot Charging of Continuous Casting Slab simulation process of pulsed magnetic field interference.
(1) Al2O3 crucible and test button are washed down with dehydrated alcohol and dried up；
(2) fire door is opened, by diagram installation sample, crucible and water cooling collet, guarantees the coaxial relation between three；
(3) vacuum will be extracted in furnace body；
(4) switchable type variable-frequency power sources is switched into high frequency alternating current mode, opens power supply experiment and start, to chamber temperature
After degree reaches 1600 DEG C, 5min is kept the temperature, test button is allowed sufficiently to melt；
(5) the power supply output of switchable type variable-frequency power sources is switched into pulsed magnetic field mode, molten metal sample is carried out
Disturbance treatment；
(6) heating and heat preservation component are moved to the left according to certain speed；
(7) after solidifying 10min, air valve is opened, cryogenic inert gas is filled with from lower end air valve, is flowed out from upper end air valve, real
Existing gas circulation, is filled with time 20s, realizes the quenching to test button；
(8) quenched sample can be used to observation growth morphology and detection elements be distributed by dissection, grinding and polishing and corrosion
Deng.
Heating work principle of the invention are as follows: coil 4 generates high-frequency alternating magnetic field by alternating current, and graphite electrode 11 is cut
Alternate magnetic force line is cut, to generate the electric current (being vortexed) of alternation in graphite electrode 11, vortex makes the original inside graphite electrode 11
Sub- high speed is regular motion, and atom collides with each other, rubs and generates thermal energy, that is, thermal energy is converted electrical energy into, to make chamber temperature
Degree rises, and achievees the purpose that melt test button 10；After temperature reaches preset temperature, and test button 10 sufficiently melts,
It cuts off the power, can stop heating.
The working principle of disturbance of magnetic field molten metal of the present invention are as follows: coil 4 generates work/intermediate frequency by work/intermediate frequency alternating current
Alternating magnetic field, according to electromagnetic principle and skin effect, the magnetic line of force of work/intermediate frequency alternating magnetic field and pulsed magnetic field can penetrate graphite
Electrode 11, to achieve the purpose that disturb molten metal.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of variable frequency induction heating and cooling device, which is characterized in that the device includes the first air valve (2), furnace body (3), line
It encloses (4), thermal-insulating body (5), fire door (6), water cooling collet (7), the second air valve (8), crucible (9), graphite electrode (11), can be switched
Formula variable-frequency power sources, the coil (4) connect with the switchable type variable-frequency power sources on the outside of furnace body (3), first air valve (2) and
Two air valves (8) are located at furnace body (3) upper left side and lower right side；
The water cooling collet (7) passes through and fixes on fire door (6), and left end is connect with Al2O3 crucible (9), the crucible (9)
It is interior to be used to place test button (10)；
The thermal-insulating body (5) is placed in the furnace chamber of furnace body (3), and the internal upper and lower surface of thermal-insulating body (5) is provided with stone
Electrode ink (11), coil (4), which encloses, to be covered in thermal-insulating body (5) outside, and the crucible (9) connecting with water cooling collet (7) passes through incubator
Hole on the right side of body (5) is vacantly internal in thermal-insulating body (5)；
The thermal-insulating body (5) connect with the Machinery Control System in furnace body (3), which can control graphite electrode
(11), thermal-insulating body (5) and coil (4) are whole mobile to furnace body (3) left side with certain speed；
The coil (4), thermal-insulating body (5), graphite electrode (11), crucible (9) and water cooling collet (7) are coaxial.
2. a kind of variable frequency induction heating according to claim 1 and cooling device, which is characterized in that the device further includes heat
Galvanic couple (1), and thermocouple (1) is embedded in the thermal-insulating body (5), and first air valve (2) and second (8) are by electricity
Magnetic switch control opening and closing, for extracting the vacuum of furnace body (3) and being filled with cryogenic inert gas to furnace body (3).
3. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that the coil (4)
It is connected by coaxial cable with switchable type variable-frequency power sources, and is connected with cooling water in coaxial cable.
4. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that the metal examination
Sample (10) size is 10cm × 1cm × 1cm, and the size of the crucible (9) is 12cm × 1.2cm × 2cm, wall thickness 1.5mm, institute
The interior diameter for stating graphite electrode (11) is 10cm, overall diameter 13cm, a height of 14cm；Thermal-insulating body (5) overall diameter is
23cm, a height of 24cm, coil (4) interior diameter are 23cm, outer diameter 26cm, a height of 15cm, and the furnace body interior diameter is
40cm, wall thickness 2cm, a height of 45cm.
5. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that the water cooling folder
Head (7) is made of fixture and cooling water pipeline, and described cooling water pipeline one end is connect with fixture, the other end and recirculated water cold phase
Even, the fixture is used to clamp and fix crucible (9).
6. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that first gas
Valve (2) and the external cryogenic gas device of the second air valve (8), which can heat to the variable frequency induction and cooling
Device circulation is filled with cryogenic inert gas, and air temperature ranges are 0-10 DEG C, and gas flow magnitude range is 0.1-0.2m3/s.
7. a kind of variable frequency induction heating according to claim 5 and cooling device, which is characterized in that the variable frequency induction adds
Heat and cooling device further include data signal acquisition control system, for by the thermocouple (1), switchable type variable-frequency power sources,
Temperature, the size of current of output and frequency that recirculated water cold and the first air valve (2), the second air valve (8) obtain, cooling water inflow and
Gas flow is converted into data information and whole process is acquired storage.
8. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that the frequency conversion sense
It should heat and the maximum heating temperature of cooling device is 2000 DEG C；Temperature rate range is 0.01-100K/s；Go up and down control temp
Error is less than ± 2k；Cold conditions final vacuum is 6.67 × 10-3Pa.
9. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that the coil (4)
In the power frequency that is passed through be 2-50KHz.
10. a kind of variable frequency induction heating according to claim 1 or 2 and cooling device, which is characterized in that pass through the water
The cooling water flow of cold collet (7) is 0.2L/min -10L/min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114058798A (en) * | 2021-11-26 | 2022-02-18 | 上海大学 | Flash annealing process and device for La-Fe-Si series alloy |
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| CN101722291A (en) * | 2009-11-26 | 2010-06-09 | 上海大学 | Method and device for simulating horizontal growth process of solidification structure |
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