CN109183157A - It is a kind of for studying the Fluid Dynamics device and application method of solidification of metal melt behavior - Google Patents
It is a kind of for studying the Fluid Dynamics device and application method of solidification of metal melt behavior Download PDFInfo
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- CN109183157A CN109183157A CN201811118648.3A CN201811118648A CN109183157A CN 109183157 A CN109183157 A CN 109183157A CN 201811118648 A CN201811118648 A CN 201811118648A CN 109183157 A CN109183157 A CN 109183157A
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- ammonium chloride
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- chloride solution
- aqueous ammonium
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007711 solidification Methods 0.000 title claims abstract description 30
- 230000008023 solidification Effects 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 title claims abstract description 20
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 165
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 80
- 238000002425 crystallisation Methods 0.000 claims abstract description 71
- 206010037660 Pyrexia Diseases 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 239000013078 crystal Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000008025 crystallization Effects 0.000 claims abstract description 11
- 238000011160 research Methods 0.000 claims abstract description 11
- 238000010792 warming Methods 0.000 claims abstract description 10
- 239000012780 transparent material Substances 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 238000010583 slow cooling Methods 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000006911 nucleation Effects 0.000 claims description 6
- 238000010899 nucleation Methods 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005660 chlorination reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 40
- 238000005266 casting Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000012188 paraffin wax Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000002893 slag Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000141353 Prunus domestica Species 0.000 description 1
- DBUTVDSHVUGWOZ-UHFFFAOYSA-N [Si].[Ni].[Cr].[Ni] Chemical compound [Si].[Ni].[Cr].[Ni] DBUTVDSHVUGWOZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B35/00—Apparatus not otherwise provided for, specially adapted for the growth, production or after-treatment of single crystals or of a homogeneous polycrystalline material with defined structure
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
It is a kind of for studying the Fluid Dynamics device and application method of solidification of metal melt behavior, belong to emtallurgy research technical field, metal bath, including crystallisation vessel, transparent fever tablet, temperature control instrument, temperature sensor and aqueous ammonium chloride solution are simulated using aqueous ammonium chloride solution.Crystallisation vessel is made using transparent material, and inner wall arranges that temperature sensor, outer wall adhere to transparent fever tablet, and transparent fever tablet is connect by electrode with temperature control instrument.The present invention is carried out being warming up to it and is completely dissolved by transparent fever tablet to aqueous ammonium chloride solution；According to research needs, the temperature of each wall surface of crystallisation vessel is adjusted, ammonium chloride crystals are made；The solidification behavior of metal can not be had an X-rayed by crystallization, the growth course analog study of ammonium chloride in cooling.The present invention realizes that accurate temperature controlling solves the problems, such as that current physical simulating device and method cannot achieve accurate temperature controlling and insulation while not reducing observation effect to aqueous ammonium chloride solution by the transparent heating sheet adhered on crystallisation vessel wall.
Description
Technical field
The invention belongs to emtallurgy research technical fields, are related to a kind of Fluid Dynamics dress for studying solidification of metal melt behavior
It sets and application method.
Background technique
All the time, people are devoted to the excellent in performance of development of metallic material, and to obtain the outstanding performance of material will
Ask material that there is good tissue, the forming core and the process grown up for studying crystal are the bases for obtaining material good organization.But
Metal is opaque, can not directly observe its crystal nucleation and growth course, and people can only pass through theory analysis, final state solidified structure
Or the evolution process that Quench tissue retrodicts crystal nucleation and grows up.There are certain limitation and defect, Hen Duowen for such analysis
Topic can not be grasped.
Studies have shown that the crystallization process of aqueous ammonium chloride solution and the process of setting of steel are much like, it is important that transparent chlorine
Crystallization precipitation can be occurred at room temperature by changing aqueous ammonium, be highly convenient for being observed and being measured in real time, can therefrom be revealed out and be permitted
The information that more steel consolidated structures and defect are formed, such as " A ", " V " segregation and sedimentary pile.Just because of this, aqueous ammonium chloride solution is made
It is had been widely used in solidification research for a kind of ideal physical modeling materials.But the reason of being limited to the epoch, with
Past aqueous ammonium chloride solution simulator production is fairly simple, and making, which there is, provides the risk of error message, Jin Erzao
The case where origin cause of formation illusion derives a wrong conclusion.
Hunt observes that the dendrite of liquid level formation solidified shell is blown, dissociates and form precipitating in Fluid Dynamics experiment
The phenomenon that.Big wild sincere beauty it is thought that a illusion, and " solidification theory of metal is practiced and application " (China Machine Press,
1990) such experiment is devised in book: with the allyl resin container side wall that hot water heating is transparent, so that ammonium chloride be prevented to hold
Crystallization nucleation on device side wall, only allows heat to shed from liquid level.As a result, it has been found that crystal grain does not precipitate, but along liquid level with thin slice
The mode of shape is grown up around.The big sincere U.S.A in open country thinks as a result, " progress that the observation of aqueous ammonium chloride solution must be careful as, because
The risk of error message is provided to us to lie dormant there." still, with hot water heating transparent acrylic resin container side
Wall, although approximate can ignore the influence that chamber wall crystallization is precipitated, the setting of hot water layer increases observation difficulty.
Jie ten thousand of Northwestern Polytechnical University is odd, Zhou Yao and with aqueous ammonium chloride solution modeling and simulation of solidification experimental study column crystal
The condition and rule changed to equiax crystal (learn by the simulation experiment study Northwestern Polytechnical University of Columnar to equiaxed transition process
Report, 1988,6 (1): 29-40).Two sides organic glass system before and after casting mold in the aqueous ammonium chloride solution simulator that they use
At side and bottom surface are copper wall cooling chamber, and the alcohol for being passed through liquid nitrogen refrigerating to cooling chamber causes two-dimentional curing condition, and coolant liquid exists
The lower circulation of hydraulic oil pump effect, temperature is adjustable, and type is intracavitary to be equipped with several pairs of nickel chromium-nickel silicon thermocouple measuring temperature fields.It is this
Simulator can carry out temperature control to side and bottom surface, but temperature drop can be generated by not accounting for casting mold fore-and-aft observing face, this meeting pair
Experimental result affects.
In order to simulate the curing condition of adiabatic heat-insulation on aqueous ammonium chloride solution simulator, research workers are being tested
The thick foam coverage of device type top of chamber use (" mathematical simulation of large-sized forging During Ingot Solidification and physical analogy (one) ",
Tsinghua University, No. 1 Heavy Machinery Factory's inside information), or laterally keep the temperature that (aqueous ammonium chloride solution is fixed using acrylic acid jacket
To the analysis of Heat Transfer science of heat and technology of solidification experiments, 2007,6 (2): 113-118).Cystosepiment and acrylic acid are low heat conduction material
Material, but can not accomplish really to be insulated, top and laterally there are still certain heat dissipations.In addition, using acrylic acid jacket
The jacket on the outside of crystallization wall need to be removed when lateral heat preservation, shooting or observation, insulation item needed for this can further influence experiment
Part.
In order to simulate covering slag there are the case where, researcher with paraffin is covered on aqueous ammonium chloride solution surface to simulate and protect
Protect slag presence (vibrational excitation forming core heat transfer mechanism and industrial applications research master thesis, Kunming University of Science and Technology,
2010).The density of paraffin is lower than aqueous ammonium chloride solution, can float on the surface of aqueous ammonium chloride solution.Melting point of paraffin wax is lower than chlorine
Change the temperature of aqueous ammonium.And paraffin is hydrophobic substance, it is immiscible with aqueous ammonium chloride solution.These characteristics of paraffin can be one
Determine the simulation that covering slag is realized in degree, but the insulating power of paraffin belongs to substance characteristics, cannot be adjusted.Therefore, stone
Wax can not simulate the case where a variety of liquid level protection (different types of covering slag or exothermic mixture etc.) when actual casting.
A kind of ammonium chloride is described in Chinese invention patent " a kind of water simulator for crystal growth (CN 202054919U) "
The device of aqueous solution simulation solidification of metal melt.Side wall and liquid level heat dissipation can also make chlorination when the device does not account for unidirectional solidification
Crystalline ammonium be precipitated, these factors not only can interference experiment phenomenon, it is serious also to obtain full of prunes conclusion.In addition, because of this
Device is designed using the cooling structure of bottom water cooling, can not change the temperature condition of container side wall and liquid level, can only conduct
The experimental provision of rough simulation melt unidirectional solidification.
Summary of the invention
In order to make up the deficiency of existing ammonium chloride Fluid Dynamics device, the present invention provides a kind of closer to practical solidification, sight
Survey the Fluid Dynamics device and method of the research solidification of metal melt behavior to work well.It is saturating by what is adhered on crystallisation vessel wall
Bright heating sheet realizes accurate temperature controlling to aqueous ammonium chloride solution.The device and method solve mesh while not reducing observation effect
Preceding physical simulating device and method cannot achieve the problem of accurate temperature controlling and insulation.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
It is a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, the Fluid Dynamics device use aqueous ammonium chloride solution
5 simulation metal baths, including crystallisation vessel 2, transparent fever tablet 1, temperature control instrument 3, temperature sensor 4, match in crystallisation vessel 2
The aqueous ammonium chloride solution 5 of system, the mass fraction of aqueous ammonium chloride solution 5 are 25~40%.
The crystallisation vessel 2 is made using transparent material, arranges that temperature sensor 4 is used on 2 inner wall of crystallisation vessel
To monitor 2 inner wall temperature of crystallisation vessel；Transparent fever tablet 1 is adhered on 2 outer wall of crystallisation vessel, transparent fever tablet 1 is logical
Electrode is crossed to be connected with temperature control instrument 3；Temperature control instrument 3 carries out temperature control to aqueous ammonium chloride solution 5 according to monitoring temperature.
The transparent fever tablet 1 of adherency, mounting temperature sensor 4 and temperature controller can all be passed through in each wall surface of crystallisation vessel 2
Device 3 realizes that the constant temperature of wall surface or slow cooling (by adjusting the temperature of transparent fever tablet 1, delay wall surface compared with natural cooling
Slow cooling), the wall surface temperature of required temperature control is determined according to the curing condition of physical simulation, ammonium chloride solution under the conditions of simulation is a variety of
Crystal nucleation growth course in 5 process of setting of liquid.
As needed, if a certain wall surface of crystallisation vessel 2 needs to reinforce cooling, cooling circuit 6 is added in the wall surface
It is cooled down, and the wall surface does not adhere to transparent fever tablet 1.The cooling circuit 6 includes gas circuit or water route, in water route
Coolant is the alcohol of normal-temperature water or liquid nitrogen refrigerating.
It is above-mentioned a kind of for studying the application method of the Fluid Dynamics device of solidification of metal melt behavior, comprising the following steps:
The first step, at room temperature, the aqueous ammonium chloride solution that configuration quality score is 25~40% in crystallisation vessel 2, at this point,
Ammonium chloride is not completely dissolved.
Second step carries out being warming up to ammonium chloride being completely dissolved by transparent fever tablet 1 to aqueous ammonium chloride solution.The chlorine
Change aqueous ammonium rising temperature for dissolving temperature to be determined by aqueous ammonium chloride solution concentration, aqueous ammonium chloride solution warming temperature range is 20~90
℃。
Third step adjusts the temperature of each wall surface of crystallisation vessel 2, makes ammonium chloride crystals according to research needs.
The temperature of each wall surface of adjusting crystallisation vessel includes following situations: by adjusting each transparent fever tablet 1
3 parameter of temperature control instrument allows each wall surface slow cooling of crystallisation vessel 2, makes ammonium chloride crystals；Or by cooling circuit 6 to crystallisation vessel
2 a certain wall surfaces carry out reinforcement cooling, grow ammonium chloride rapid crystallization；Or by transparent heating sheet 1 heating make crystallisation vessel 2 certain
One wall surface constant temperature, with the simulation of solidification behavior under Mr. Yu's wall surface adiabatic condition.
4th step observes ammonia chloride crystal precipitation and the formation of consolidated structure through transparent heating sheet 1 and crystallisation vessel 2.
Effect and benefit of the invention are as follows: the present invention can arbitrarily adjust the temperature condition of each wall surface, accurately control
The temperature gradient of all directions in aqueous ammonium chloride solution process of setting, crystal nucleation is raw in process of setting under the conditions of simulation is a variety of
Growth process is practical and convenient, easy to operate one kind, the ideal research device of simulation effect and method.In addition, the present invention is not dropping
While low observation effect, it is able to solve current physical simulating device and method cannot achieve the problem of accurate temperature controlling and insulation.
Detailed description of the invention
Fig. 1 is the present invention for studying the Fluid Dynamics schematic device of solidification of metal melt behavior.(attached drawing is signal letter
Scheme, temperature control instrument 3 and temperature sensor 4 only is shown in right side wall in figure, temperature control instrument 3 and temperature sensor on remaining wall surface
4 are not shown.)
Fig. 2 is the Fluid Dynamics schematic device that crystallisation vessel side increases cooling circuit.(attached drawing is simplified schematic diagram, figure
In only in right side wall temperature control instrument 3 and temperature sensor 4 are shown, the temperature control instrument 3 and temperature sensor 4 on remaining wall surface do not show
Out.)
In figure: 1 transparent fever tablet；2 crystallisation vessels；3 temperature control instruments；4 temperature sensors；5 aqueous ammonium chloride solutions；6 is cooling
Circuit.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
The present invention be suitable for it is a variety of under the conditions of Study on Crystals Growth during solidification of metal melt, implementation step is such as
Under: certain density aqueous ammonium chloride solution is configured in transparent crystallisation vessel 2；Transparent fever is adhered on 2 outer wall of crystallisation vessel
Piece 1 carries out being warming up to ammonium chloride being completely dissolved by transparent fever tablet 1 to aqueous ammonium chloride solution；It is arranged on 2 inner wall of crystallisation vessel
Temperature sensor 4 is used to monitor 2 inner wall temperature of crystallisation vessel, according to research needs, adjusts the temperature of each wall surface of crystallisation vessel 2,
Make ammonium chloride crystals, the formation of ammonia chloride crystal and consolidated structure is observed through transparent heating sheet 1 and crystallisation vessel 2.
Fig. 1 show the simulator of multi-panel temperature-controllable, which can all lead in each wall surface of crystallisation vessel 2
It crosses and adheres to constant temperature or slow cooling that transparent fever tablet 1, mounting temperature sensor 4 and temperature control instrument 3 realize wall surface, required temperature control
Wall surface depending on the curing condition of physical simulation.The simulator of multi-panel temperature-controllable of the invention includes transparent material system
Crystallisation vessel 2 made of work are contained with the certain density aqueous ammonium chloride solution 5 of simulation metal bath, crystallization in crystallisation vessel 2
Mounting temperature sensor 4 is used to monitor the temperature of crystallisation vessel wall on the inner wall of container 2, and the surface adhesion of crystallisation vessel 2 is transparent
Fever tablet 1, transparent fever tablet 1 are connected by electrode with temperature control instrument 3, and temperature control instrument 3 is connected with temperature sensor 4 with conducting wire
It connects, the temperature monitored according to temperature sensor 4 controls the temperature of aqueous ammonium chloride solution 5 by adjusting temperature control instrument 3.
Fig. 2 show the simulator for increasing cooling circuit, which needs the condition of big temperature gradient in simulation
When, a certain wall surface does not adhere to transparent fever tablet 1, but increase gas circuit or water route cool down the wall surface.Increase of the invention
The simulator of cooling circuit includes the crystallisation vessel 2 that transparent material is made, and it is molten that simulation metal is contained in crystallisation vessel 2
The certain density aqueous ammonium chloride solution 5 of body, crystallisation vessel 2 adhere to cooling circuit 6, crystallisation vessel in the outside wall surface for needing Quench
It is mounted with that temperature sensor 4 is used to monitor the temperature (wall surface for increasing cooling circuit is not installed) of crystallisation vessel wall on 2 inner wall,
The outside wall surface of crystallisation vessel 2 has adhered to transparent fever tablet 1 (wall surface for increasing cooling circuit is not installed), and transparent fever tablet 1 passes through
Electrode is connected with temperature control instrument 3, and temperature control instrument 3 is connect with temperature sensor 4 with conducting wire, is monitored according to temperature sensor 4
Temperature by adjust temperature control instrument 3 temperature of aqueous ammonium chloride solution 5 is controlled.
Technical solutions and effects of the present invention is further elaborated below by way of four specific examples.
Embodiment 1 simulates the process of setting of large-scale casting ingot
At room temperature, the aqueous ammonium chloride solution 5 that 30% is configured in crystallisation vessel 2, at this point, ammonium chloride is not completely dissolved；It is logical
It crosses transparent fever tablet 1 and 60 DEG C is warming up to aqueous ammonium chloride solution 5, be completely dissolved ammonium chloride.All transparent hairs of whole wall surfaces
Backing 1, which is cut off the power, not to be continued to heat, and ammonium chloride crystals are precipitated in entire 2 slow cooling of crystallisation vessel, simulates large-scale casting ingot air-cooled
When solidification behavior, the formation of ammonia chloride crystal and consolidated structure is observed through transparent heating sheet 1 and crystallisation vessel 2.
Embodiment 2, the process of setting of metal bath in the case where simulating there are exothermic mixture
At room temperature, the aqueous ammonium chloride solution 5 that 35% is configured in crystallisation vessel 2, at this point, ammonium chloride is not completely dissolved；It is logical
It crosses transparent fever tablet 1 and 80 DEG C is warming up to aqueous ammonium chloride solution 5, be completely dissolved ammonium chloride.The transparent fever tablet 1 of upper wall surface is kept
It is 60 DEG C, the transparent fever tablet 1 of four side walls and bottom is cut off the power, and ammonium chloride crystals are precipitated, and there are exothermic mixtures for simulation
In the case of solidification of metal melt process, the shape of ammonia chloride crystal and consolidated structure is observed through transparent heating sheet 1 and crystallisation vessel 2
At.
Embodiment 3 simulates the process of setting of large-scale casting ingot columnar zone
At room temperature, the aqueous ammonium chloride solution 5 that 35% is configured in crystallisation vessel 2, at this point, ammonium chloride is not completely dissolved；It is logical
It crosses transparent fever tablet 1 and 80 DEG C is warming up to aqueous ammonium chloride solution 5, be completely dissolved ammonium chloride.It is set in 2 left side wall surface of crystallisation vessel
Cooling circuit 6 is set, the coolant in water route uses room temperature water；Right side wall surface temperature is controlled at 80 DEG C, to horizontally generate
Certain temperature gradient simulates the process of setting of large-scale casting ingot columnar zone.In addition, in addition to the wall surface of left and right, remaining wall surface temperature
Control inhibits ammonium chloride in the crystallization of these wall surfaces at 60 DEG C.
Embodiment 4 simulates " brilliant rain " forming process
At room temperature, the aqueous ammonium chloride solution 5 that 35% is configured in crystallisation vessel 2, at this point, ammonium chloride is not completely dissolved；It is logical
It crosses transparent fever tablet 1 and 80 DEG C is warming up to aqueous ammonium chloride solution 5, be completely dissolved ammonium chloride.Pass through transparent heating sheet 1 control four
A side and bottom temp are 30 DEG C, and control upper wall surface (liquid level) temperature is observation under the conditions of 60 DEG C or upper wall surface natural cooling
The generation of " brilliant rain ".
Embodiment described above only expresses embodiments of the present invention, and but it cannot be understood as to the invention patent
Range limitation, it is noted that for those skilled in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all belonged to the scope of protection of the present invention.
Claims (7)
1. a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, which is characterized in that the Fluid Dynamics device is adopted
Metal bath, including crystallisation vessel (2), transparent fever tablet (1), temperature control instrument (3), temperature are simulated with aqueous ammonium chloride solution (5)
The aqueous ammonium chloride solution (5) prepared in sensor (4) and crystallisation vessel (2)；
The crystallisation vessel (2) is made using transparent material, arranges temperature sensor (4) on crystallisation vessel (2) inner wall
For monitoring crystallisation vessel (2) inner wall temperature；Transparent fever tablet (1), transparent fever are adhered on described crystallisation vessel (2) outer wall
Piece (1) is connected by electrode with temperature control instrument (3)；Temperature control instrument (3) according to monitoring temperature to aqueous ammonium chloride solution (5) into
Trip temperature control；
The transparent fever tablet (1) of adherency, mounting temperature sensor (4) and temperature control can all be passed through in each wall surface of crystallisation vessel (2)
Instrument (3) realizes that the constant temperature or slow cooling of wall surface, the wall surface temperature of required temperature control are determined according to the curing condition of physical simulation,
Simulate it is a variety of under the conditions of crystal nucleation growth course in aqueous ammonium chloride solution (5) process of setting.
2. according to claim 1 a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, which is characterized in that
The mass fraction of the aqueous ammonium chloride solution (5) is 25~40%.
3. according to claim 1 or 2 a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, feature exists
In as needed, if a certain wall surface needs reinforcement cooling of the crystallisation vessel (2), it is right to add cooling circuit (6) in the wall surface
It is cooled down, and the wall surface does not adhere to transparent fever tablet (1).
4. according to claim 3 a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, which is characterized in that
The cooling circuit (6) includes gas circuit or water route.
5. according to claim 4 a kind of for studying the Fluid Dynamics device of solidification of metal melt behavior, which is characterized in that
Coolant in the water route is the alcohol of room temperature water or liquid nitrogen refrigerating.
A kind of for studying the user of the Fluid Dynamics device of solidification of metal melt behavior described in 6. claim 1-5 is any
Method, it is characterised in that following steps:
The first step, at room temperature, the aqueous ammonium chloride solution for being 25~40% in the interior configuration quality score of crystallisation vessel (2), at this point, chlorine
Change ammonium not to be completely dissolved；
Second step carries out being warming up to ammonium chloride being completely dissolved by transparent fever tablet (1) to aqueous ammonium chloride solution；The chlorination
Aqueous ammonium rising temperature for dissolving temperature is determined by aqueous ammonium chloride solution concentration；
Third step adjusts the temperature of crystallisation vessel (2) each wall surface, makes ammonium chloride crystals according to research needs；
The temperature of each wall surface of adjusting crystallisation vessel includes following situations: the control by adjusting each transparent fever tablet (1)
Warm instrument (3) parameter allows each wall surface slow cooling of crystallisation vessel (2), makes ammonium chloride crystals；Or by cooling circuit (6) to crystallization
Container (2) a certain wall surface carries out reinforcement cooling, grows ammonium chloride rapid crystallization；Or make to tie by transparent fever tablet (1) heating
The brilliant a certain wall surface constant temperature of container (2), with the simulation of solidification behavior under Mr. Yu's wall surface adiabatic condition；
4th step, through transparent fever tablet (1) and crystallisation vessel (2) observation ammonia chloride crystal is precipitated and the formation of consolidated structure.
7. it is according to claim 6 a kind of for studying the application method of the Fluid Dynamics device of solidification of metal melt behavior,
It is characterized in that, aqueous ammonium chloride solution (5) the rising temperature for dissolving temperature is determined with aqueous ammonium chloride solution concentration, ammonium chloride solution
Liquid (5) warming temperature range is 20~90 DEG C.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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