CN106424567B - Superhard aluminum casting composite electromagnetic pulse solidified structure processing unit and method - Google Patents
Superhard aluminum casting composite electromagnetic pulse solidified structure processing unit and method Download PDFInfo
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- CN106424567B CN106424567B CN201610987372.7A CN201610987372A CN106424567B CN 106424567 B CN106424567 B CN 106424567B CN 201610987372 A CN201610987372 A CN 201610987372A CN 106424567 B CN106424567 B CN 106424567B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
- B22C9/065—Cooling or heating equipment for moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
The present invention discloses a kind of superhard aluminum casting composite electromagnetic pulse solidified structure processing unit and processing method, wherein processing unit includes metal mold, edge electromagnetic pulse device, top electromagnetic pulse device, the inner cavity of the metal mold is used to place melt, the side wall of the metal mold includes outer layer and internal layer, water cooling cavity is formed between the outer layer and internal layer, the water cooling cavity bottom is equipped with cooling water inlet, top is equipped with cooling water outlet, the edge electromagnetic pulse device is arranged at the metal mold outer wall, the top electromagnetic pulse device is located at directly over the inner cavity of the metal mold.The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, makes electromagnetic energy in melt penetrate into maximization, is reaching uniform preheated metallic type, and while improving casting blank solidification degree of supercooling, electromagnetic energy promotes special thick casting core structure refinement evenly.
Description
Technical field
, can preheated metallic type and improvement casting more particularly to one kind the present invention relates to a kind of casting method and casting device
Superhard the aluminum casting composite electromagnetic pulse solidified structure processing unit and processing method of structure property.
Background technology
Superduralumin is one of aluminium alloy of current development potentiality maximum, since it is (high equivalent to super-strength steel with intensity
Up to 680Mpa), and it is light-weight the features such as, be widely used in making aircraft skin, rib, undercarriage etc..But due to superhard
The shortcomings of casting original structure stability of aluminium is not high, and Low Cycle Fatigue Strength is poor, greatly limit it makes in special equipment
With.For superhard aluminum component usually by casting acquisition, whether casting method and technique are appropriately directly related to the quality of ingot quality.
With being not required to, moulding, heat conduction and recovery electric heating system are good, precision is high, finish in integrated member production for permanent mold casting
High, the features such as rate of metal is high, but its chilling action is big, the porosity is larger, complicated casting mold nonuniform organization, without deformability,
Gas permeability, to be also easy to produce the defects of cold shut and misrun be problem urgently to be resolved hurrily at present.Since the thermal resistance of cast iron is more much larger than copper,
So general continuous cast mold Cu crystallizer, makes molten metal quickly cool down, while Cu crystallizer can make aluminium casting size more
Become more meticulous.While hot investment casting is ensured, inside workpiece tissue, component be also influence its stable mechanical property it is important because
Element.Degree of supercooling increase can effective crystal grain thinning, increase nucleation rate.Recirculated water is passed through in metal mold to ensure to force cooling, can
To be obviously improved ingot quality, if not preheated, casting mold is subject to strong thermal shock during casting, and internal stress doubles, while light casting
Easily there is cold shut phenomenon.Usually first metal mold is preheated to improve above-mentioned condition, conventional metals type pre-heating mean has：Combustion gas is pre-
Heat, electrical heating, heating furnace preheating etc., the above method easily occur after heating that temperature drop is big, heating is uneven, preheating temperature is difficult to steady
Situations such as control, and heat it is uneven caused by casting strip cold shut phenomenon by heat patching method improve process it is very complicated,
The also excessive casting center portion of thickness is changed greatly with quality of edges, there are tissue looseness, stomata is serious the problems such as.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of superhard aluminum casting composite electromagnetic pulse solidified structure processing unit, with solution
Certainly the above-mentioned problems of the prior art, it can make the electromagnetic energy in melt penetrate into maximization, in uniform preheated metallic type, carry
While high casting blank solidification degree of supercooling, formula processing is compensated to melt core structure by electromagnetic energy, promotes the special thick casting heart
Portion's structure refinement evenly, obtains high quality, high-precision ingot casting.
It is a further object of the present invention to provide one kind using above-mentioned superhard aluminum casting composite electromagnetic pulse solidified structure processing
The method that device is cast, this method can make the electromagnetic energy in melt penetrate into maximization, in uniform preheated metallic type, improve
While casting blank solidification degree of supercooling, formula processing is compensated to melt core structure by electromagnetic energy, promotes special thick casting center portion
Structure refinement evenly, obtains high quality, high-precision ingot casting.
To achieve the above object, the present invention provides following scheme：A kind of superhard aluminum casting composite electromagnetic pulse solidification group
Processing unit, including metal mold, edge electromagnetic pulse device, top electromagnetic pulse device are knitted, the inner cavity of the metal mold is used for
Melt is placed, the side wall of the metal mold includes outer layer and internal layer, and water cooling cavity, the water are formed between the outer layer and internal layer
Cold cavity bottom is equipped with cooling water inlet, top is equipped with cooling water outlet, and the edge electromagnetic pulse device is arranged at the gold
Genotype outer wall, the top electromagnetic pulse device are located at directly over the inner cavity of the metal mold.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the edge electromagnetic pulse dress
Put including edge coil, external iron core, the edge coil is wound on the outer layer of the metal mold side wall, and adjacent two circles edge
Mutually insulated between coil, the external iron core sleeve is outside the edge coil, every circle edge coil and the metal mold side wall
Outer layer between and per mutually insulating between circle edge coil and the external iron core.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the side wall of the metal mold
Outer layer, edge coil, cooling water inlet, be connected to temperature sensor on cooling water outlet.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the metal mold work wall thickness
H=D/50 is spent, D is the diameter (cm) of ingot casting melt in the metal mold.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the metal mold side wall it is interior
It is provided with layer and is fixed with several heat sinks, the metal mold and the heat sink is made of copper.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, it is described per circle edge coil with
Insulating ceramic fiber is set between the outer layer of the metal mold side wall.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the top electromagnetic pulse dress
Put and be wound on including built-in iron core, top winding, shell, the top winding in the built-in iron core, it is the top winding, built-in
Iron core is respectively positioned in the shell, mutually insulated between top winding described in adjacent two circle, the top winding with it is described built-in
Mutually insulate between iron core and the shell.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the edge coil, top line
Circle is the tubular hollow copper coil of helical turned to by high temperature lacquer envelope curve, leads to cooling in the hollow cavity of the hollow copper coil
Water, the edge coil, top winding are driven by the pulse power of identical frequency.
The superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention, wherein, the diameter of the built-in iron core
Small end is close to melt, and the end of the built-in iron core diameter small end is away from 10~20mm of bath surface.
The method cast using above-mentioned superhard aluminum casting composite electromagnetic pulse solidified structure processing unit, this method bag
Include following step：
(1) the edge electromagnetic pulse device, top electromagnetic pulse device are connected to the two poles of the earth of the pulse power,
The edge electromagnetic pulse device current pulse is set to produce pulsed magnetic field, the pulsed magnetic field preheats the metal mold
Processing, pulse frequency are controlled in 15~55Hz, and current control is in 50~100A or so, pulse duty factor 20%；
(2) target temperature is reached at the same time when casting metals liquid reaches cast temperature, by the metal when the metal mold
Liquid is poured into the metal mold, after the melt in the metal mold reaches target preheating temperature, makes the top electromagnetic pulse
Device is passed through identical pulse current, and the magnetic field that the top electromagnetic pulse device, edge electromagnetic pulse device produce is made at the same time
For the melt, action time continues 1~5 minute；
(3) below the melt cooling to solid liquid phase temperature when, by the cooling water in the water cooling cavity of the metal mold
Open, the melt is quickly cooled down, obtain casting.
Since the side wall of the metal mold of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention is included outside
Layer and internal layer, form water cooling cavity between outer layer and internal layer, and edge electromagnetic pulse device is arranged on metal mold outer wall, top electricity
Magnetic pulse device is located at directly over the inner cavity of metal mold, and edge electromagnetic pulse device had not only been used to heat metal mold but also at pulse
Molten metal solidified structure is managed, metal mold preheating cost is effectively reduced and makes metal mold preheating evenly, reduce because metal mold preheats
The uneven casting defect brought, and extend metal mold service life, filled using edge electromagnetic pulse device, top electromagnetic pulse
The composite pulse for putting composition acts on melt, and the electromagnetic energy of composite pulse device compensates melt core structure formula processing,
Melt core structure is reached the effect that crystal grain uniformly refines, obtain high quality, high-precision ingot casting.
In addition, electromagnetic pulse acts on metal mold, itself inside metal mold is set to produce vortex flow, so as to reach the effect of heating
Fruit, makes metal mold homogeneous heating, and it is good to mend temp effect, and can be easy to use with heating.
In addition, setting heat sink in metal mold, the heat dissipation area of metal mold can be increased, increase metal bath degree of supercooling, then
Handled with reference to electromagnetic pulse, the tissue of crystal grain more fine uniform can be obtained, metal mold, heat sink are made of copper, on the one hand
It can ensure hot investment casting requirement, on the other hand, since the material property of copper is satisfactory electrical conductivity, low magnetic conductivity, it is well led
Electrically ensure to form vortex in metal mold, and then sensing heating is carried out to it, and magnetic field is penetrated into melt and disturbs smaller, guarantor
Demonstrate,prove pulsed magnetic field to act on the magnetic energy of metal liquid, increase magnetic field has the function that to homogenize crystal grain to the penetration depth of melt.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the entirety sectional view of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention；
Fig. 2 is the top view of the metal mold of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention；
Fig. 3 is electromagnetic pulse waveform caused by the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention
Figure；
Fig. 4 is induced electricity fluxion in the metal mold of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention
Value simulation calculates polar plot；
Fig. 5 is the sensing produced in the melt in the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention
Magnetic vector figure；
Fig. 6 is the electromagnetic force produced in the melt of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention
Polar plot；
Fig. 7 is metal mold in the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention to magnetic induction intensity
Influence curve；
Fig. 8 is Distribution of Magnetic Field feelings in the melt of the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention
Condition；
Fig. 9 be the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit of the present invention different current excitations under to molten
The influence of body indexing distribution；
Figure 10 is influence of the electromagnetic energy to critical Gibbs free energy；
Figure 11 is instantaneous magnetic energy production in solution under different electric currents；
Figure 12 is that the ingot quality obtained using electromagnetism preheated metallic type and non-preheated metallic type is contrasted；
Figure 13 is through pulse magnetic field treatment and the superduralumin 7A04 alloy grain thinning effects pair without pulse magnetic field treatment
Than.
Description of reference numerals：Metal mold 11, edge electromagnetic pulse device 12, top electromagnetic pulse device 13, cooling water enter
Mouth 113, cooling water outlet 114, edge coil 121, external iron core 122, heat sink 115, built-in iron core 131, top winding
132nd, shell 133.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of superhard aluminum casting composite electromagnetic pulse solidified structure processing unit, as shown in Figure 1, including gold
Genotype 11, edge electromagnetic pulse device 12, top electromagnetic pulse device 13, metal mold 11 is made of copper, the work wall of metal mold 11
Thickness H=D/50, D are the diameter (cm) of ingot casting melt in metal mold 11, on the one hand can ensure precision using copper metal mold
Casting requires, and on the other hand, since the material property of copper is satisfactory electrical conductivity, low magnetic conductivity, its satisfactory electrical conductivity ensures in gold
Vortex is formed in genotype, and then sensing heating is carried out to it, and magnetic field is penetrated into melt and disturbs smaller, guarantee pulsed magnetic field pair
The magnetic energy effect of metal liquid, increase magnetic field have the function that to homogenize crystal grain, while metal mold 11 to the penetration depth of melt
Thickness increase can be further ensured that heating effect；The inner cavity 111 of metal mold 11 is used to place melt, the side wall bag of metal mold 11
Include outer layer and internal layer, form water cooling cavity 112 between outer layer and internal layer, 112 bottom of water cooling cavity be equipped with cooling water inlet 113,
Top is equipped with cooling water outlet 114, and cooling water inlet 113, cooling water outlet 114 are all connected to cooling water source, cooling water is existed
Circulation, edge electromagnetic pulse device 12 are arranged at 11 outer wall of metal mold in water cooling cavity 112, and top electromagnetic pulse device 13 is located at
Directly over the inner cavity 111 of metal mold 11.
Edge electromagnetic pulse device 12 includes edge coil 121, external iron core 122, and external iron core 122 is by ferrimagnet
It is process, iron core wall thickness is 5~20mm, and edge coil 121 is wound on the outer layer of 11 side wall of metal mold, and adjacent two circles edge
Mutually insulated between coil 121, external iron core 122 are sleeved on outside edge coil 121, per circle edge coil 121 and 11 side of metal mold
Mutually insulate between the outer layer of wall and per between circle edge coil 121 and external iron core 122.
Temperature sensor is connected on the outer layer of the side wall of metal mold 11, edge coil 121, for showing work temperature
Spend, temperature sensor is connected on cooling water inlet 113, cooling water outlet 114, to calculate hot-fluid purpose, control knot
Brilliant temperature.
Be fixed with several heat sinks 115 being made of copper on the internal layer of 11 side wall of metal mold, adjacent two heat sink 115 it
Between spacing it is equal.
It is all provided between the outer layer of 11 side wall of edge coil 121 and metal mold and between edge coil 121 and external iron core 122
Insulating ceramic fiber is put, for heat-insulated, insulation, insulation.
Top electromagnetic pulse device 13 includes built-in iron core 131, top winding 132, shell 133, and built-in iron core 131 is iron
The T-shaped solid cylinder structure that magnetic material is process, top winding 132 are wound in built-in iron core 131, top winding 132, interior
Put iron core 131 to be respectively positioned in shell 133, mutually insulated between adjacent two circles top winding 132, top winding 132 and built-in iron
Pass through insulating ceramic fiber mutually insulated between core 131 and shell 133.
Above-mentioned edge coil 121, top winding 132 are hollow copper coil, and hollow copper coil is by high temperature enameled wire coiling
It is tubular into helical, driven by the pulse power, ensure magnetomotive force Fm=NI=7000A, load pulses waveform is using zig-zag point
Pulse current is held, frequency is less than 55Hz, is documented, and the induced field of melt center portion is reached 1000Gs, you can to reach good
Good structure property index, edge electromagnetic pulse processing unit use pulse current 100A, spread all over 5 layers of coil winding, every layer 14
Circle, 70 circle altogether, leads to cooling water in hollow cavity, the absolute distance between edge coil 121 and the side wall of metal mold 11 is maintained at
Between 10~100mm, larger magnetic loss is be easy to cause away from too far away, distance is closely an impediment to very much cooling water in metal mold 11 and circulates；
Top electromagnetic pulse processing unit uses pulse current 100A, 7 layers of 132 coiling of top winding, every layer of 6 circle, altogether 42 circle, top
Electromagnetic pulse device is located at directly over melt, and the diameter small end of built-in iron core 131 is close to melt, away from bath surface 10~
20mm, is relatively large in diameter end away from melt.
Using the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit casting 7A04 extra super duralumin alloys of the present invention
Method, including following processes：
(1) both ends of above-mentioned edge coil 121, top winding 132 are connected to the two poles of the earth of the pulse power, and
Make edge coil 121, the interior connection cooling water of the hollow cavity of top winding 132, make 121 current pulse of edge coil, edge line
The external iron core 122 of the excitation of circle 121 produces pulsed magnetic field, starts to carry out metal mold 11 the pre-heat treatment, pulse frequency is controlled 15
~55Hz, current control can effectively improve work efficiency in 50~100A or so, its pulse output is as shown in figure 3, duty cycle alpha T
20~50% are arranged to,
(2) (degree of superheat is higher than when metal mold 11 reaches target temperature while 7A04 extra super duralumin alloys reach cast temperature
100 DEG C), pour into metal bath, after target preheating temperature to be achieved, after adjusting appropriate crystal grain refinement pulse power parameters, make
132 current pulse of top winding, the magnetic field that top electromagnetic pulse device 13, edge electromagnetic pulse device 12 produce act at the same time
Inside melt, action time continues 1~5 minute, and the solidified structure crystal grain refinement of melt is acted,
(3) below melt cooling to solid liquid phase temperature when, the cooling water in 11 water cooling cavity 112 of metal mold is opened, and is made
The defects of melt quickly cools down, and the quality versus of ingot casting is as shown in figure 12, and the metal mold institute after preheating is into ingot casting is less, through pulse
Magnetic field processing and the grain refining effect contrast of the 7A04 extra super duralumin alloys without pulse magnetic field treatment are as shown in figure 13, through pulse
The crystal grain refinement of the 7A04 extra super duralumin alloys of magnetic field processing is evenly.
When being illustrated in figure 4 edge electromagnetic pulse 12 preheated metallic type 11 of device, the work wall and edge line of metal mold 11
Current density figure (the unit of circle 121：A), this figure shows edge coil 121 when being 70 circles (5 × 14 circle), 100A electric currents, frequency
The current density of 15Hz, it is seen that metal mold 11 made of copper work wall induced currents with loading current direction on the contrary, have electric current and
Joule heat can be produced.
Metal mold 11 is illustrated in figure 5 to preheat and pour into melt, when carrying out electromagnetic pulse processing to melt, the magnetic in melt
Induction (unit：T).Early-stage study result confirms to need magnetic induction intensity to reach 0.1T (1000Gs) i.e. to crystal grain refinement
And even tissue has good effect, the magnetic induction intensity that the method for the present invention acts on melt center portion is larger, and edge is smaller, can be with
The problem of melt center portion degree of supercooling is small is supplemented, reaches ideal design index.
When being illustrated in figure 6 to melt progress electromagnetic pulse processing, the distribution of electromagnetic force (unit in melt：N).In magnetic energy
On the basis of infiltration, the electromagnetic force for being directed toward center portion is produced to crystal grain, squeezing action is applied to melt crystal grain, limits its row of growing up
To have good Grain Refinement Effect.Be illustrated in figure 7 with metal mold with without the magnetic induction intensity that metal mold is surveyed with
The situation of change of electric current, it is found that metal mold has magnetic induction intensity and slightly decay, but is not enough to influence the pulse to inner melt
Function influence, so magnetic field impulse can be realized normally.
Fig. 8~Figure 11 is the reason of the ingot casting progress pulse magnetic field treatment Grain Refinement for φ 60 and big cross section
By foundation, Fig. 8 changes according to the melt radial magnetic field profile under different exciting currents, by magnetic fluctuation and steady situation, by magnetic
Field is roughly divided into edge induced field and center portion induced field.Edge group mainly produces heterogeneous forming core, while root by dendrite fragmentation
Control degree of supercooling by controlling cooling water inflow according to the temperature distribution history of Fig. 9, temperature curve by temperature sensor measurement, so
Edging tissue reaches crystal grain refinement and is relatively easy to.But core structure degree of supercooling is less, and electromagnetic force is also smaller, refinement mesh is extremely difficult to
's.In relatively low degree of supercooling, electromagnetic energy reduces homogeneous nucleation, critical nuclei, Gibbs free energy nucleating work according to Figure 10
To measure to reach grain refining effect, shown in figure, for degree of supercooling within 5 DEG C, 100A pulsed magnetic fields can increase nucleation rate substantially,
To make up the shortcomings that degree of supercooling is insufficient, so in order to reach uniform thinning effect, Fig. 9 Temperature Distributions and Figure 10, which should be integrated, to be examined
Consider, i.e. cooling water inflow and magnetic field mechanism electric current should match.And Figure 11 is the electromagnetic energy total amount that exciting current produces.And metal mold
Interior logical cooling water cooling was primarily to sensing heating while controlled the decrease of metal mold degree of supercooling when offsetting melt solidification
Cold degree.
Specific case is applied in the present invention to be set forth the principle of the present invention and embodiment, above example
Illustrate to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, according to
According to the thought of the present invention, in specific embodiments and applications there will be changes.In conclusion this specification content
It should not be construed as limiting the invention.
Claims (5)
1. a kind of method cast using superhard aluminum casting composite electromagnetic pulse solidified structure processing unit, its feature are existed
In the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit includes metal mold (11), edge electromagnetic pulse device
(12), top electromagnetic pulse device (13), the inner cavity (111) of the metal mold (11) are used to place melt, the metal mold
(11) side wall includes outer layer and internal layer, and water cooling cavity (112), the water cooling cavity are formed between the outer layer and internal layer
(112) bottom is equipped with cooling water inlet (113), top is equipped with cooling water outlet (114), the edge electromagnetic pulse device (12)
The metal mold (11) outer wall is arranged at, the top electromagnetic pulse device (13) is located at the inner cavity of the metal mold (11)
(111) directly over；The edge electromagnetic pulse device (12) includes edge coil (121), external iron core (122), the edge
Coil (121) is wound on the outer layer of the metal mold (11) side wall, and mutually insulated between adjacent two circles edge coil (121),
The external iron core (122) is sleeved on the edge coil (121) outside, every circle edge coil (121) and the metal mold (11) side
Between the outer layer of wall and per mutually insulating between circle edge coil (121) and the external iron core (122)；The top electromagnetism
Pulser (13) includes built-in iron core (131), top winding (132), shell (133), and the top winding (132) is wound on institute
To state in built-in iron core (131), the top winding (132), built-in iron core (131) are respectively positioned in the shell (133), and adjacent two
Mutually insulated between top winding described in circle (132), the top winding (132) and the built-in iron core (131) and described outer
Shell mutually insulate between (133)；The edge coil (121), top winding (132) are turned to by high temperature lacquer envelope curve
The tubular hollow copper coil of helical, cooling water, the edge coil (121), top line are led in the hollow cavity of the hollow copper coil
(132) are enclosed to be driven by the pulse power of identical frequency；The outer layer of the side wall of the metal mold (11), edge coil (121), cooling
Water inlet (113), cooling water outlet are connected to temperature sensor on (114)；
The method cast using the superhard aluminum casting composite electromagnetic pulse solidified structure processing unit is comprised the following steps：
(1) edge electromagnetic pulse device (12), top electromagnetic pulse device (13) are connected to the two poles of the earth of the pulse power,
Edge electromagnetic pulse device (12) current pulse is set to produce pulsed magnetic field, the pulsed magnetic field is to the metal mold (11)
The pre-heat treatment is carried out, pulse frequency is controlled in 15~55Hz, and current control is in 50~100A or so, pulse duty factor 20%；
(2) target temperature is reached at the same time when casting metals liquid reaches cast temperature, by the metal when the metal mold (11)
Liquid is poured into the metal mold (11), after the melt in the metal mold (11) reaches target preheating temperature, makes the top
Electromagnetic pulse device (13) is passed through identical pulse current, the top electromagnetic pulse device (13), edge electromagnetic pulse device
(12) magnetic field produced acts on the melt at the same time, and action time continues 1~5 minute；
(3) below the melt cooling to solid liquid phase temperature when, by the water cooling cavity (112) of the metal mold (11)
Cooling water is opened, and the melt is quickly cooled down, is obtained casting.
Cast 2. according to claim 1 using superhard aluminum casting composite electromagnetic pulse solidified structure processing unit
Method, it is characterised in that：Metal mold (11) work the wall thickness H=D/50, D are the interior ingot casting melt of the metal mold (11)
Diameter (cm).
Cast 3. according to claim 1 using superhard aluminum casting composite electromagnetic pulse solidified structure processing unit
Method, it is characterised in that：It is provided with the internal layer of metal mold (11) side wall and is fixed with several heat sinks (115), it is described
Metal mold (11) and the heat sink (115) are made of copper.
Cast 4. according to claim 1 using superhard aluminum casting composite electromagnetic pulse solidified structure processing unit
Method, it is characterised in that：It is described that insulation pottery is set per circle edge coil (121) between the outer layer of the metal mold (11) side wall
Porcelain fiber.
Cast 5. according to claim 1 using superhard aluminum casting composite electromagnetic pulse solidified structure processing unit
Method, it is characterised in that：The diameter small end of the built-in iron core (131) close to melt, built-in iron core (131) diameter compared with
The end of small end is away from 10~20mm of bath surface.
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| CN108273972A (en) * | 2018-03-13 | 2018-07-13 | 内蒙古科技大学 | A kind of device and method of electromagnetic energy crystal grain refinement |
| CN108436047B (en) * | 2018-04-23 | 2019-09-10 | 东北大学 | Resultant field prepares the device and method of big specification fine grain homogeneous aluminium alloy cast ingot |
| CN108672656A (en) * | 2018-08-08 | 2018-10-19 | 溧阳市新力机械铸造有限公司 | A kind of casting method of turbo blade casting device and turbo blade |
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