CN104959577A - Method for simulating growth of solidification structure of large ingot under slow cooling condition, and fusion casting experiment apparatus - Google Patents
Method for simulating growth of solidification structure of large ingot under slow cooling condition, and fusion casting experiment apparatus Download PDFInfo
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Abstract
The invention discloses a method for simulating the growth of the solidification structure of a large ingot under a slow cooling condition, and a fusion casting experiment apparatus. Aiming at a solidification process of the large ingot, the influence on the growth of the solidification structure under different temperature gradients, different cooling speeds and different molten steel flow speeds can be researched through the simulation. An external field is introduced into a metal melt solidification process, so that the influence on the growth of the solidification structure by the external field can be researched. According to the invention, a growth process of the solidification structure of the large ingot under the slow cooling condition is simulated, simulation results are directly related to a large ingot solidification process, and the simulation results play an important role in determining the casting technology for the large ingot, adjusting parameters of related equipment, and improving defects of the solidification structure.
Description
Technical field
The present invention relates to a kind of metal freezing method and experimental provision, particularly relate to a kind of large ingot solidification tissue growth method of simulation and experimental provision, be applied to the solidification technology field of metal solidification texture growth course thermal simulation technical field and large-sized casting ingot.
Background technology
Along with China's power industry, the develop rapidly of nuclear industry and petrochemical industry, increasing to the demand of heavy casting and forging, simultaneously also more and more higher to the quality requirements of heavy casting and forging.Large-sized casting ingot due to volume large, radiation processes is slow, and process of setting wants last from days, and the cooldown rate difference of ingot casting different parts is maximum reaches more than 100 times, and therefore the problem such as thick, the grain size of solidified structure and component distributing is uneven, shrinkage cavity shrinkage porosity is very serious.Not only affect the performance of final products, also often cause forging crack, heat treatment can not evenly wait a follow-up difficult problem.Strengthening forming core is the essential measure reducing these defects to produce more crystallization nuclei and to promote crystal grain to breed.Developing and solidify control method based on inside generation, homogenizing of outfield intensifying propagation, is the key obtaining good solidified structure.
Research at present to large-sized casting ingot process of setting, the following several approach of main employing: one is the method adopting numerical simulation, simulate the change procedure of the flow field of large ingot casting in process of setting, temperature field and solute field, adjust the parameters such as the shape of casting mold, pouring temperature, pouring type on this basis, Optimization Technology; Two is directly dissect large-scale or superhuge ingot casting.By observing the macrostructure of ingot casting, in conjunction with the regularity of distribution of the elements such as inside ingot C, S, and the distribution of shrinkage cavity and porosity and field trash and Formation rule etc., the principal element of the large Casting Ingot Solidification Process of research impact, as thermograde, free convection etc.But the cost of dissecting ingot casting is high, and research cycle is long, and the process of setting individual difference of large-sized casting ingot is large, and the rule of single ingot casting has certain limitation; Three is the nucleation and growth processes of crystal grain under the method simulation slow cooling condition of application numerical simulation, and by comparing different parameters, different model, on the impact of analog result, finds the model comparatively met with truth.
The factors such as the flowing of the solidified structures such as the grain size formed in the process of setting of metal, the tissue topography of dendrite, solute segregation and thermograde, cooldown rate and melt in ingot casting are relevant., in large-sized casting ingot process of setting, there is the features such as non-uniform temperature, cooldown rate is slow, melt convection is strong in relatively little ingot casting.Current existing experimental technique and equipment can not reappear the curing condition of large inside ingot, therefore, there is certain difficulty to the simulation that large ingot solidification is organized.
" method of pulse magneto liquid level vibration thinning metal solidification texture " of Shanghai University, patent publication No.: CN201010167538,2010.12.22.This technical operation is convenient, and remarkable to the solidified structure thinning effect of ingot casting, the mode of action is upper surface lattice coil being acted on metal bath, is contactless melt process, casting mold can be avoided the shielding action in magnetic field.Therefore, pulse magneto liquid level vibration refinement technology is extremely suitable for the application in die casting industrial production.But the experimental subjects in early stage is all based on small-sized ingot casting, its setting rate is very fast, lacks deep research for the impact of solidified structure under slow cooling condition.
Being familiar with solidified structure and solute Distribution feature under different curing condition, is realize the basis that large-sized casting ingot homogenizes.Be the curing condition such as thermograde, cooldown rate obtaining large inside ingot by the method for numerical simulation at present, the method utilizing ingot casting to dissect obtains partial coagulation tissue and solute Distribution situation.And curing condition is not combined with solidified structure, solute Distribution the process of setting analyzing ingot casting.
Summary of the invention
In order to solve prior art problem, the object of the invention is to the deficiency overcoming prior art existence, a kind of method and founding experimental provision of simulating solidified structure growth under large ingot casting slow cooling condition are provided, by controlling the cooldown rate of metal bath different directions, simulate the thermograde of zones of different in large Casting Ingot Solidification Process, and introduce outfield by outfield gatherer, carry out external field treatment to solidification of metal melt process, the present invention is that the solidified structure growth studying large inside ingot zones of different provides a kind of research means more effectively newly.
Create object for reaching foregoing invention, the present invention adopts following technical proposals:
A kind of method simulating solidified structure growth under large ingot casting slow cooling condition, raw metal is placed in crucible in body of heater, and crucible is placed in the body of heater vacuum environment of the body of heater final vacuum 10Pa of temperature-controllable, the calandria that 4 can control power output is respectively set in the periphery of crucible, come to carry out heating and temperaturel control to 4 sides of crucible respectively, concrete fusion-casting process is as follows:
A. in the Metal Melting stage, first raw metal is placed in crucible, then crucible is heated by controlling each calandria simultaneously, after raw metal is heated, forming metal bath;
B. in the metal freezing stage, provide temperature gradient conditions, cooldown rate, pressure flow field state for metal solidification texture growth course and apply any one assistant interventional mechanism or any several assistant interventional composition mechanism in the state of outfield, being specially:
1. control the not ipsilateral of each calandria to crucible to be respectively incubated, form the temperature required gradient of setting in crucible inside, realize the metal solidification texture thermal simulation experiment under customization temperature gradient conditions;
2. in the metal freezing stage, control the rate of temperature fall on each surface of crucible, the temperature of crucible 4 sides is maintained according to the state of temperature of the cooling curve of diverse location in large inside ingot process of setting, the cooldown rate of metal bath in crucible is controlled respectively, realizes the metal solidification texture thermal simulation experiment under controlled cooldown rate;
3. in the metal freezing stage, also utilize the integral level rotary reciprocating motion of body of heater, make metal bath inside produce forced convertion, realize the metal solidification texture thermal simulation experiment under the condition of setting flow field;
4. in solidification of metal melt process, also outfield is applied to metal bath and process, make metal bath inside produce concussion effect, realize the metal solidification texture thermal simulation experiment under setting condition of external field.The inventive method under the condition such as " under having temperature gradient conditions ", " under Different Cooling Conditions " and " under different molten steel flow velocitys ", imports outfield in solidification of metal melt process simultaneously, the impact that research outfield grows solidified structure.
The present invention simulates the process of solidified structure growth under large ingot casting slow cooling condition, the result of simulation and large Casting Ingot Solidification Process direct correlation, to determine large ingot casting casting technique, adjust relevant device parameter and improve solidified structure defect significant.
As the preferred technical scheme of the present invention, in the Metal Melting stage with in the metal freezing stage, raw metal and metal bath are all in the thermal environment of body of heater final vacuum 1Pa.
As the present invention's preferred technical scheme further, heating limits temperature 1800 DEG C; Thermograde in crucible is adjustable within the scope of 0 ~ 10 DEG C/cm; Calandria temperature-controlled precision remains on ± 0.5 DEG C within; Between 1600 ~ 1200 DEG C, the cooldown rate of crucible surface is controlled within the scope of 0 ~ 10 DEG C/min; The body of heater speed of rotation be 0 ~ 30 rev/min adjustable.
As the further optimal technical scheme of such scheme of the present invention, gather according to being not less than the temperature data of 10Hz frequency to 4 of crucible sides.
A kind of the present invention of enforcement simulates the founding experimental provision of the method for solidified structure growth under large ingot casting slow cooling condition, primarily of heating and atmosphere protection system, temperature control and temperature acquisition system and central controller composition, heating and atmosphere protection system mainly comprise and are arranged at crucible in the vacuum furnace shell of sealing and graphite protective sleeve, graphite protective sleeve is enclosed within the outside of crucible, corundum fine sand is tamped between graphite protective sleeve and crucible, raw metal is placed in crucible, temperature control and temperature acquisition system are made up of a series of temperature thermocouple and temperature data collecting system and temperature controller, temperature data collecting system and temperature controller are all connected with central controller signal, in vacuum furnace shell, 4 sides of graphite protective sleeve are respectively in the face of one group of graphite heating body, the operating current of each graphite heating body carries out independent control by temperature controller, each temperature thermocouple is arranged between each graphite heating body and crucible, in clearance space between vacuum furnace shell and graphite protective sleeve, all separate with thermal insulation board between adjacent often group graphite heating body, form a series of independently heating clamber respectively, temperature in each heating clamber is controlled by independently one group of graphite heating body of correspondence respectively, bottom surface between each heating clamber and end face are closed by heat insulation felt, temperature control is carried out according to the cooling curve of diverse location in large Casting Ingot Solidification Process by central controller, corresponding temperature gradient in crucible is set in different directions, realize the metal solidification texture thermal simulation experiment under customization temperature gradient conditions, central controller adjusts the power output of each graphite heater respectively by temperature controller, control the rate of temperature fall on each surface of crucible, realize the metal solidification texture thermal simulation experiment under setting condition of external field, raw metal and crucible are all in the thermal environment of vacuum 10Pa, be provided with body of heater rotary system, body of heater rotary system is made up of the swivel base be arranged at below the outside body of heater of vacuum furnace shell and power set, swivel base is driven to drive whole body of heater crankmotion by central controller controls power set, the metal bath inside in crucible is made to form forced convertion, realize the metal solidification texture thermal simulation experiment under the condition of setting flow field, be provided with outfield gatherer, outfield gatherer is utilized to import outfield to the metal bath in crucible, by central controller controls outfield gatherer, carry out under making solidification of metal melt process be in the outer field action of customization, realize the metal solidification texture thermal simulation experiment under setting condition of external field.
As the preferred technical scheme of the present invention, the importing coil of outfield gatherer is arranged at vacuum furnace shell inside, imports coil at furnace interior controllable lift, and for importing coil configuration cooling system.
As the present invention's preferred technical scheme further, the cooling system importing coil is water-cooling system, and make water flowing cooling in importing coil, cooling water flow is regulated according to the height of pipe outer wall temperature.
As the further optimal technical scheme of such scheme of the present invention, heat insulation felt is carbon felt.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. the process of setting of large ingot casting is a complicated process, the growth course of solidified structure is both by the impact in temperature field, flow field, affect again the formation of the defects such as large ingot casting shrinkage cavity and porosity and gross segregation, the present invention can simulate large ingot solidification tissue growth process, result is directly associated with the solidified structure of ingot casting, to the process of setting controlling large ingot casting, improve the solidified structure of large ingot casting, realize large-sized casting ingot composition and homogenize significant;
2. the present invention is by changing cooling condition, reproduce thermograde and the cooldown rate of zones of different in large Casting Ingot Solidification Process, study the growth course of large inside ingot zones of different solidified structure, for development solidifies control method based on inside generation, homogenizing of outfield intensifying propagation, realize homogenizing of large-sized casting ingot and foundation and reference are provided.
Accompanying drawing explanation
Fig. 1 is the founding experimental provision schematic diagram that the preferred embodiment of the present invention simulates large ingot solidification tissue growth.
Fig. 2 is the sectional view in A-A direction in Fig. 1.
Fig. 3 is the large ingot casting sample sampling core position view prepared in a preferred embodiment of the invention.
Fig. 4 is the sectional view in B-B direction in Fig. 3.
Fig. 5 is the thermal simulation temperature control curve map that the preferred embodiment of the present invention adopts.
Fig. 6 is that the large ingot casting center of the preferred embodiment of the present invention is without the thermal simulation ingot casting central section photo under temperature gradient conditions.
Fig. 7 is the thermal simulation ingot casting edge cross-section photographs of the large ingot casting of the preferred embodiment of the present invention near ingot casting edge.
Detailed description of the invention
Details are as follows for the preferred embodiments of the present invention:
In the present embodiment, see Fig. 1 ~ Fig. 7, a kind of founding experimental provision of simulating solidified structure growing method under large ingot casting slow cooling condition, primarily of heating and atmosphere protection system, temperature control and temperature acquisition system, body of heater rotary system and central controller composition, heating and atmosphere protection system mainly comprise and are arranged at crucible 7 in the vacuum furnace shell 1 of sealing and graphite protective sleeve 3, graphite protective sleeve 3 is enclosed within the outside of crucible 7, corundum fine sand 8 is tamped between graphite protective sleeve 3 and crucible 7, raw metal is placed on 7 li, crucible, temperature control and temperature acquisition system are made up of a series of temperature thermocouple 6 and temperature data collecting system 4 and temperature controller, temperature data collecting system 4 and temperature controller are all connected with central controller signal, in vacuum furnace shell 1, 4 sides of graphite protective sleeve 3 are respectively in the face of one group of graphite heating body 2, the operating current of each graphite heating body 2 carries out independent control by temperature controller, each temperature thermocouple 6 is arranged between each graphite heating body 2 and crucible 7, in clearance space between vacuum furnace shell 1 and graphite protective sleeve 3, all separate with thermal insulation board 12 between adjacent often group graphite heating body 2, form a series of independently heating clamber 11 respectively, temperature in each heating clamber 11 is controlled by independently one group of graphite heating body 2 of correspondence respectively, bottom surface between each heating clamber 11 and end face are closed in case loses heat by heat insulation felt 5, heat insulation felt 5 is carbon felt, temperature control is carried out according to the cooling curve of diverse location in large Casting Ingot Solidification Process by central controller, corresponding temperature gradient in crucible 7 is set in different directions, realize the metal solidification texture thermal simulation experiment under customization temperature gradient conditions, central controller adjusts the power output of each graphite heater 2 respectively by temperature controller, control the rate of temperature fall on each surface of crucible 7, realize the metal solidification texture thermal simulation experiment under setting condition of external field, it is in the thermal environment of 10Pa that raw metal and crucible 7 are all in vacuum, be provided with body of heater rotary system, body of heater rotary system is made up of the swivel base 10 be arranged at below the outside body of heater of vacuum furnace shell 1 and power set, swivel base 10 is driven to drive whole body of heater crankmotion by central controller controls power set, the metal bath inside in crucible 7 is made to form forced convertion, realize the metal solidification texture thermal simulation experiment under the condition of setting flow field, body of heater rotary system is by motor, mechanical drive train unify spacing part composition, under three phase alternating current motor drives, whole body of heater crankmotion is driven by swivel base 10, molten steel inside is made to form forced convertion, be provided with outfield gatherer 9, outfield gatherer 9 is utilized to import outfield to the metal bath in crucible 7, by central controller controls outfield gatherer 9, carry out under making solidification of metal melt process be in the outer field action of customization, realize the metal solidification texture thermal simulation experiment under setting condition of external field, the importing coil of outfield gatherer 9 is arranged at vacuum furnace shell 1 inside, import coil at furnace interior controllable lift, for when preventing work because hyperthermia radiation causes losing efficacy, to importing coil configuration cooling system, the cooling system importing coil is water-cooling system, make water flowing cooling in importing coil, cooling water flow is regulated according to the height of pipe outer wall temperature.
In the present embodiment; see Fig. 1 ~ Fig. 7; a kind of experimental provision of simulating solidified structure growth under large ingot casting slow cooling condition; mainly comprise by heating and atmosphere protection system, temperature control and temperature acquisition system, body of heater rotary system and outfield import system four systems, this equipment specific implementation method is as follows:
A. raw metal is made the block of suitable size, after acid pickling and rust removing, put into the crucible 7 of cuboid, the inner cavity size of crucible 7 is long 150mm, wide 100mm, high 230mm, once experiment raw metal is about 20Kg, break when heating for preventing crucible 7, crucible 7 overcoat has a graphite protective sleeve 3, crucible 7 and graphite protective sleeve 3 centre high-purity corundum fine sand 8 tamp, with thermal insulation board, whole furnace chamber is divided into four heating clambers 11, the top of each heating clamber 11 and bottom are all closed with carbon felt, it is in the vacuum environment of 10Pa that raw metal and cuboid crucible 7 entirety are in vacuum,
B. arrange the power output of graphite heater 2, atmosphere temperature in heating furnace according to 10Hz frequency collection data, can be heated to 1550 DEG C by temperature acquisition system, is incubated 120 minutes, raw metal is melted completely;
C. according to the different resample area of large inside ingot simulated in Fig. 3 with Fig. 4, according to the cooling process of each graphite heater 2 of the temperature curve setting in Fig. 5, control the cooling velocity of crucible 7 not coplanar, the metal bath in crucible 7 is solidified under different thermogrades;
D. cooling is continued according to setting curve, until be down to room temperature, completely after cooling, open vent valve, open bell, sample is taken out, after pre-grinding, polishing, hydrochloric acid solution with 50% soaks 30 minutes at the temperature of 80 DEG C, use absolute alcohol clean surface rapidly after taking out, observe and statistical experiment result, as shown in Figure 6 and Figure 7, the structure refinement of ingot casting center and peripheral, crystal grain is even.
Raw metal is placed in crucible 7 by the present embodiment, and raw metal and crucible 7 are in the vacuum environment be well incubated.Four side temperature of crucible 7 by faced by four independently graphite heating body 2 control.Graphite heating body 2 jointly heating makes the raw metal in crucible 7 be fused into metal bath completely.Temperature control is carried out according to the cooling curve of diverse location in large Casting Ingot Solidification Process in four sides of crucible 7, thus can in the inner formation temperature gradient of crucible 7.By adjusting the power output of graphite heating body 2, form different cooldown rates at the two ends of crucible 7.The integral level of body of heater is utilized to be rotated in the forced convertion of metal bath inside generation.In addition, outfield gatherer 9 can be placed in the top of metal bath, external field treatment is carried out to solidification of metal melt process.
The present embodiment achieves the solidified structure thermal simulation under temperature gradient conditions, according to the numerical result in large Casting Ingot Solidification Process temperature field, by adjusting the power output of graphite heater 2, control the rate of temperature fall on each surface of crucible 7, formation temperature gradient in metal bath in crucible 7, is convenient to the impact that research thermograde grows solidified structure; The present embodiment, for the feature that in large-sized casting ingot process of setting, between ingot casting regional, cooldown rate difference is large, controls graphite heating body 2 with different rates cooling, realizes the solidified structure thermal simulation under different cooling rate; The present embodiment utilizes the integral level of body of heater to rotate research forced convertion to the impact of solidified structure, is rotated in molten steel produces forced convertion by body of heater integral level, and the convection current of simulation molten steel is on the impact of solidified structure; The present embodiment utilizes outfield gatherer 9 to import outfield in solidification of metal melt process, the impact that research outfield grows large Casting Ingot Solidification Process.
By reference to the accompanying drawings the embodiment of the present invention is illustrated above; but the invention is not restricted to above-described embodiment; multiple change can also be made according to the object of innovation and creation of the present invention; change, the modification made under all Spirit Essences according to technical solution of the present invention and principle, substitute, combination, to simplify; all should be the substitute mode of equivalence; as long as goal of the invention according to the invention; only otherwise deviating from the present invention simulates the method for solidified structure growth and the know-why of founding experimental provision and inventive concept under large ingot casting slow cooling condition, all protection scope of the present invention is belonged to.
Claims (8)
1. the method for solidified structure growth under the large ingot casting slow cooling condition of simulation, it is characterized in that, raw metal is placed in crucible in body of heater, and crucible is placed in the body of heater vacuum environment of the body of heater final vacuum 10Pa of temperature-controllable, the calandria that 4 can control power output is respectively set in the periphery of crucible, come to carry out heating and temperaturel control to 4 sides of crucible respectively, concrete fusion-casting process is as follows:
A. in the Metal Melting stage, first raw metal is placed in crucible, then crucible is heated by controlling each calandria simultaneously, after raw metal is heated, forming metal bath;
B. in the metal freezing stage, provide temperature gradient conditions, cooldown rate, pressure flow field state for metal solidification texture growth course and apply any one assistant interventional mechanism or any several assistant interventional composition mechanism in the state of outfield, being specially:
1. control the not ipsilateral of each calandria to crucible to be respectively incubated, form the temperature required gradient of setting in crucible inside, realize the metal solidification texture thermal simulation experiment under customization temperature gradient conditions;
2. in the metal freezing stage, control the rate of temperature fall on each surface of crucible, 4 of crucible side temperature are maintained according to the state of temperature of the cooling curve of diverse location in large inside ingot process of setting, the cooldown rate of the metal bath of diverse location in crucible is controlled respectively, realizes the metal solidification texture thermal simulation experiment under controlled cooldown rate;
3. in the metal freezing stage, also utilize the integral level rotary reciprocating motion of body of heater, make metal bath inside produce forced convertion, realize the metal solidification texture thermal simulation experiment under the condition of setting flow field;
4. in solidification of metal melt process, also outfield is applied to metal bath and process, make metal bath inside produce concussion effect, realize the metal solidification texture thermal simulation experiment under setting condition of external field.
2. simulate the method for solidified structure growth under large ingot casting slow cooling condition according to claim 1, it is characterized in that: in the Metal Melting stage with in the metal freezing stage, raw metal and metal bath are all in the thermal environment of body of heater final vacuum 1Pa.
3. according to claim 1 or 2, simulate the method for solidified structure growth under large ingot casting slow cooling condition, it is characterized in that: heating limits temperature 1800 DEG C; Thermograde in crucible is adjustable within the scope of 0 ~ 10 DEG C/cm; Calandria temperature-controlled precision remains on ± 0.5 DEG C within; Between 1600 ~ 1200 DEG C, the cooldown rate of crucible surface is controlled within the scope of 0 ~ 10 DEG C/min; The body of heater speed of rotation be 0 ~ 30 rev/min adjustable.
4. according to claim 1 or 2, simulating the method for solidified structure growth under large ingot casting slow cooling condition, it is characterized in that: gather according to being not less than the temperature data of 10Hz frequency to 4 of crucible sides.
5. one kind implements the claims the founding experimental provision of the method simulating solidified structure growth under large ingot casting slow cooling condition described in 1, primarily of heating and atmosphere protection system, temperature control and temperature acquisition system and central controller composition, described heating and atmosphere protection system mainly comprise and are arranged at crucible (7) in the vacuum furnace shell (1) of sealing and graphite protective sleeve (3), described graphite protective sleeve (3) is enclosed within the outside of described crucible (7), corundum fine sand (8) is tamped between described graphite protective sleeve (3) and described crucible (7), it is inner that raw metal is placed on described crucible (7), described temperature control and temperature acquisition system are made up of a series of temperature thermocouple (6) and temperature data collecting system (4) and temperature controller, described temperature data collecting system (4) and described temperature controller are all connected with described central controller signal, it is characterized in that: in described vacuum furnace shell (1), 4 sides of described graphite protective sleeve (3) are respectively in the face of one group of graphite heating body (2), the operating current of each described graphite heating body (2) carries out independent control by described temperature controller, each described temperature thermocouple (6) is arranged between each described graphite heating body (2) and described crucible (7), in clearance space between described vacuum furnace shell (1) and described graphite protective sleeve (3), thermal insulation board (12) is all used to separate between the adjacent described graphite heating body of often group (2), form a series of independently heating clamber (11) respectively, temperature in each described heating clamber (11) is controlled by the independently graphite heating body (2) described in a group of correspondence respectively, bottom surface between each described heating clamber (11) and end face are closed by heat insulation felt (5), temperature control is carried out according to the cooling curve of diverse location in large Casting Ingot Solidification Process by described central controller, the interior corresponding temperature gradient of described crucible (7) is set in different directions, realize the metal solidification texture thermal simulation experiment under customization temperature gradient conditions, described central controller adjusts the power output of each described graphite heater (2) respectively by temperature controller, control the rate of temperature fall on described crucible (7) each surface, realize the metal solidification texture thermal simulation experiment under setting condition of external field, raw metal and described crucible (7) are all in the thermal environment of vacuum 10Pa, be provided with body of heater rotary system, described body of heater rotary system is made up of the swivel base (10) be arranged at below vacuum furnace shell (1) outside body of heater and power set, described swivel base (10) is driven to drive whole body of heater crankmotion by power set described in described central controller controls, the metal bath inside in described crucible (7) is made to form forced convertion, realize the metal solidification texture thermal simulation experiment under the condition of setting flow field, be provided with outfield gatherer (9), described outfield gatherer (9) is utilized to import outfield to the metal bath in described crucible (7), by outfield gatherer (9) described in described central controller controls, carry out under making solidification of metal melt process be in the outer field action of customization, realize the metal solidification texture thermal simulation experiment under setting condition of external field.
6. one kind implements the claims founding experimental provision described in 5, it is characterized in that: the importing coil in described outfield gatherer (9) is arranged at described vacuum furnace shell (1) inside, described importing coil, at furnace interior controllable lift, is described importing coil configuration cooling system.
7. implement the claims a founding experimental provision described in 6, it is characterized in that: the cooling system of described importing coil is water-cooling system, make water flowing cooling in described importing coil, cooling water flow is regulated according to the height of pipe outer wall temperature.
8. implement the claims a founding experimental provision described in any one in 5 ~ 7, it is characterized in that: described heat insulation felt (5) is carbon felt.
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