CN105855498A - Semisolid metal slurry preparation device and method - Google Patents
Semisolid metal slurry preparation device and method Download PDFInfo
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- CN105855498A CN105855498A CN201510031678.0A CN201510031678A CN105855498A CN 105855498 A CN105855498 A CN 105855498A CN 201510031678 A CN201510031678 A CN 201510031678A CN 105855498 A CN105855498 A CN 105855498A
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- puddler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
Abstract
The invention discloses a semisolid metal slurry preparation device and method. The semisolid metal slurry preparation device comprises an air supplying device body, an air guiding pipe, a stirring rod and a bearing container used for containing a metal melt. The end, stretching into the metal melt in the bearing container, of the stirring rod is a stirring end. The stirring end is internally provided with a cavity. The air supplying device body is used for injecting cooling gas into the cavity inside the stirring end through the air guiding pipe when the metal melt is stirred by the stirring rod, and a processing mode of cooling and stirring is formed, so that in the stirring and flowing processes of the metal melt, the internal temperature field is uniformly distributed basically, obvious too cold gradients are avoided, the dendritic crystal growth environment is destroyed, and thus semisolid slurry with a certain proportion of near-spheroidal primary solid phase uniformly distributed in a liquid phase matrix is obtained. According to the semisolid metal slurry preparation device and method, the semisolid slurry is continuously and rapidly prepared, and continuous working is stable and reliable; the process can be simplified, the cost is reduced, and the efficiency is improved; and the industrialized application of the semisolid metal processing technology is promoted.
Description
Technical field
The present invention relates to semisolid metal processing technology field, particularly relate to a kind of semi-solid metal slurry and prepare
Device and method.
Background technology
Early 1970s, the research worker such as Massachusetts Institute Technology M.C.Flemings has invented half
Solid metal forming technology, from this, the preparation of semi-solid metal slurry and shaping cause countries in the world scholar
Common concern and research.The preparation of semi solid slurry is that the basis of semisolid metal processing technology is with crucial.
According to document " Behavior of metal alloys in the semisolid state " (M.C.Flemings,
Metall Trans,1991,22A:957-981)、“Method and apparatus for shaping
semisolid metals”(A.Mitsuru,S.Hiroto,H.Yasunori,et al,EP Patent,
0745694A1,1996)、“A novel technique to produce metal slurries for
Semisolid metal processing ", invention entitled " a kind of suspension cone cylinder formula semi-solid metal slurry
Preparation and conveyer device ", the Chinese patent of Application No. 200810114097.3, it is invention entitled that " half solid
State metal and alloy pulp or the preparation method of blank ", the Chinese patent of Application No. 200410009296.X,
(Kang Yonglin, Mao Weimin, Hu Zhuanqi write document " metal material semi-solid processing theory and technology ", science
Publishing house, 2004) and document " Semi-Solid Metal Process " (thank aquatic, Li Xinggang, Wang Hao, Zhang Ying,
Metallurgical industry publishing house, 2012) report, obtaining semi-solid alloy slurry has multiple method, as single-screw stirs
Method, Double helix paddling process, electromagnetic stirring method, bubble agitation method, Prepared by Low Superheat Pouring and weak mechanical mixing method,
Turbulence effect method, chemistry grain refinement, ultrasonic Treatment method, spray deposition, cooling chute method, company
Afterflow becomes transformation approach, rotates heat content counterbalanced procedure etc..But in order to reduce semi-solid metal slurry preparation cost and
Realizing the reliable industrialized production of steady and continuous, scholars, research worker and industrial quarters are still constantly being exerted
Power and exploration, it is intended to find the technology of preparing of new more preferable semi-solid metal slurry.
Document " A Novel Technique to Produce Metal Slurries for Semi-Solid Metal
Processing”(J.Wannasin,R.A.Martinez,M.C.Flemings,Proceedings
of the 9th on Semi-solid Processing of Alloys and Composites,Pusan,Korea,
2006,366-369) propose: Wannasin, Martinez etc. of Songkla university of Thailand propose one
The new method of semi-solid metal slurry is prepared in bubble disturbance.Its technology path is: in alloy melt cooling procedure
In, by the alloy melt having the most lacunary graphite puddler immersion low overheat in graphite wall, by gas
Body imports in alloy melt by the aperture of graphite rod, and the graphite puddler in melt buoyancy and rotation produces
Under centrifugal action, bubble will rise and the motion of shape track of spinning in the melt, and it is the most right to produce melt
Flow weak stirring action, just can obtain semi solid slurry when alloy melt temperature is down to semi-solid temperature interval.
In the process equipment of semi solid slurry is prepared in bubble disturbance, will immerse with the most lacunary graphite puddler
And in graphite rod, it is passed through gas in the alloy melt of low overheat simultaneously, treats that alloy melt is down to semisolid
Temperature range.But the method can cause part bubble residence in alloy melt, and the aperture of graphite rod
Easily blocking, needs frequently cleaning.
Document " Semi-solid processing of engineering alloys by a twin-screw
rheo-moulding process.”(S.Ji,Z.Fan and M.J.Bevis,Mater Sci & Eng,
2001,299A:210-217) propose: Double helix mechanical stirring equipment mainly includes liquid magnesium alloy feeding machine
Structure, Double helix mechanical agitation mechanism and central control machine structure.Liquid magnesium alloy once enters stirring system, and one
While by Double helix puddler intensive shear, be cooled to intended fraction solid；Work as magnesium alloy semi solid state
When slurry arrives transfer valve, nascent solid phase has turned to spherical particle, and is evenly distributed on the liquid of low melting point
Xiang Zhong.But this Double helix mechanical agitation rheology is penetrated casting machine and is appropriate only for the semi-solid rheological molding of magnesium alloy.
In Double helix mechanical stirring equipment, overheated alloy melt is steadily imported in Double helix mechanical agitation cylinder.
But the weak point of the method is double-spiral structure, and to there is screw rod operating mode poor, consuming height, the life-span is short, is suitable only for
In the preparation of magnesium alloy semisolid slurry, and troublesome problem is dismantled in cleaning.
The United States Patent (USP) of Application No. 4434837 proposes rheological casting technology (new MIT method), is also called " rotation
Turn the cooling skill of handling needles ".The core concept of this technology is: is poured into by the aluminium alloy of low overheat and prepares in crucible,
The copper rod utilizing plated film carries out the most weak mechanical agitation to aluminium alloy, makes alloy melt be cooled to liquidus temperature
Hereinafter, then remove stirring copper rod, allow semi-solid alloy melt be cooled to predetermined temperature, thus obtain more
Preferably semi solid slurry.In the equipment of MIT technique, the plated film copper rod with cooling effect is inserted low
The melt of the degree of superheat carries out the most weak mechanical agitation.But it is solid that the method is not suitable for preparing big volume half
State slurry and the continuous-stable being difficult to semi-solid metal slurry are quickly prepared.
European patent EP 0745691A1 proposes New Rheocasting technology, is called for short NRC.Its technology
Route is: first flow through on a hang plate by low overheated alloy melt, is formed containing a large amount of nascent solid phases
The semi solid slurry of core, then pours in slurry collection crucible, makes in slurry by controlling intensity of cooling
Nascent solid phase is grown up with spherical manner, then semi-solid metal slurry is carried out temperature adjustment, to obtain as far as possible
Uniform temperature field or fraction solid, finally obtain semi-solid metal slurry.In New Rheocasting work
In skill equipment, over-heat metal melt is smoothly watered inverted inclination flat board (Inclined Pipe or slanted half-circle pipe)
Upper.But the method easily causes hang plate surface sizing, need constantly cleaning, waste time and energy and waste
Alloy.
Chinese patent in addition with Application No. 200620018003.9 proposes a kind of melt dispersion mixing system
Sizing device；Application No. 03132471.1 Chinese patent proposes and does not waits curve extruding-shear-induced isothermal
Spherocrystallization semisolid blank is combined preparation method, and it is solid that Application No. 200810114097.3 proposes suspension cone bucket type half
State metal paste preparation facilities；Application No. 00109540.74 Chinese patent proposes low overheat and adds light current
Magnetic stirring pulping technology, Application No. 200710011510.9 proposes undaform and tilts version vibration pulping device,
Application No. 201120425807.1 proposes a kind of device for preparing light alloy semisolid slurry etc..
Any of the above method preparing semi-solid alloy slurry is respectively arranged with the feature of oneself, but the most all exists respective
Deficiency, great majority are also merely resting on the laboratory research stage, still need to propose new pulping device and technology,
So that Simplified flowsheet, reduce cost, improve efficiency, promote the industrial applications of semisolid metal processing technology.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of new semi-solid metal slurry preparation facilities
And method.
For solving above-mentioned technical problem, the present invention provides a kind of semi-solid metal slurry preparation facilities, including: supply
Device of air, airway, puddler and for holding the carrying container of metal bath；Described puddler stretches into
In described carrying container, the one end in metal bath is stirring end, has cavity inside described stirring end, described
Feeder for passing through described airway to described when described metal bath is stirred by described puddler
Cooling gas is injected in stirring end internal cavities.
In an embodiment of the present invention, described puddler be the cavity of hollow structure and centre in the vertical
Extend to described stirring end；
Or by a hollow sleeve and the solid post being arranged at described hollow sleeve center in the middle of described puddler
Constitute, between described solid post and described hollow sleeve inwall, form cavity, and this cavity extends in the vertical
To described stirring end；
Or the stirring end of described puddler is hollow structure, other parts are solid construction.
In an embodiment of the present invention, described puddler stirring end is additionally provided with and described cavity with upper bit
The blow vent of connection, the air intake of described airway is connected with the gas outlet of described feeder, described inducing QI
The gas outlet of pipe is connected with described blow vent or stretches into described cavity by described blow vent, injects described cavity
Interior cooling gas flows out described cavity eventually through described blow vent.
In an embodiment of the present invention, the gas outlet of described airway is stretched into described by described gas injection port
During cavity, described airway stretches into the sidewall of described chamber portion and is provided with the injection communicated with airway pore
Hole, described cooling gas is sprayed in described cavity by described spray-hole.
In an embodiment of the present invention, the stirring end outer wall of described puddler is additionally provided with stirring vane.
In an embodiment of the present invention, metal during the stirring end of described puddler stretches into described carrying container
Time in melt, the angle between its longitudinal axis and horizontal plane is 30 °～90 °.
In an embodiment of the present invention, also include mixing control device, be connected with described puddler, use
Rotating speed in time controlling the stirring of described puddler.
In an embodiment of the present invention, also include temperature-detecting device, be used for detecting described carrying container
The temperature of middle metal bath.
In an embodiment of the present invention, the internal diameter of described airway is 2mm～100mm.
In order to solve the problems referred to above, present invention also offers one and utilize semi-solid metal slurry as above
Preparation facilities prepares the method for semi-solid metal slurry, including:
In described carrying container, prepare metal bath, maybe the metal bath prepared is added described carrying and hold
In device；
According to preset rotation speed and direction in the stirring end metal bath in described carrying container of described puddler
It is stirred, and described feeder is pressed pre-set gas flow by described airway and injected in described cavity
Cooling gas；
After the metal bath in described carrying container is cooled to predetermined temperature, described puddler stops stirring,
Described feeder stops injecting cooling gas in described cavity.
In an embodiment of the present invention, described preset rotation speed is 0～1000r/min.
In an embodiment of the present invention, described pre-set gas flow is 0～1000L/min.
In an embodiment of the present invention, described predetermined temperature is equal to the metallic object liquid phase of described metal bath
Line temperature t+ △ t, the span of △ t is 0 DEG C～100 DEG C.
The invention has the beneficial effects as follows:
Semi-solid metal slurry preparation facilities and method that the present invention provides include feeder, airway, stir
Mix bar and for holding the carrying container of metal bath；Puddler stretches in carrying container in metal bath
One end is stirring end, has cavity inside stirring end, and feeder is for carrying out metal bath at puddler
In stirring end internal cavities, inject cooling gas by airway during stirring, form the process of cooling and stirring
Mode so that internal temperature field distribution is substantially uniform during stirring flowing and does not have bright for metal bath
Aobvious supercool gradient, destroys dendritic growth environment, thus obtains and be uniformly distributed certain proportion in liquid matrix
The semi solid slurry of near spherical nascent solid phase.The visible the most quickly system that present invention achieves semi solid slurry
Standby, the most stable and reliable in work, cost can be reduced with Simplified flowsheet, improve efficiency, promote semisolid gold
Belong to the industrial applications of process technology.
Accompanying drawing explanation
The puddler structural representation one that Fig. 1 provides for the embodiment of the present invention one；
The puddler structural representation two that Fig. 2 provides for the embodiment of the present invention one；
The puddler structural representation three that Fig. 3 provides for the embodiment of the present invention one；
The preparation facilities that Fig. 4 provides for the embodiment of the present invention two prepares semi-solid metal slurry schematic flow sheet；
The semi-solid metal slurry preparation facilities structural representation that Fig. 5 provides for the embodiment of the present invention three；
The preparation facilities that Fig. 6 provides for the embodiment of the present invention three prepares semi-solid metal slurry view one；
The preparation facilities that Fig. 7 provides for the embodiment of the present invention three prepares semi-solid metal slurry view two；
The preparation facilities that Fig. 8 provides for the embodiment of the present invention three prepares semi-solid metal slurry view three；
The A356 aluminium alloy semi-solid slurry metallographic microstructure signal that Fig. 9 provides for the embodiment of the present invention three
Figure；
The ADC12 aluminium alloy semi-solid slurry metallographic microstructure signal that Figure 10 provides for the embodiment of the present invention three
Figure；
The 7075 aluminium alloy semi-solid slurry metallographic microstructure signals that Figure 11 provides for the embodiment of the present invention three
Figure；
The AZ91D magnesium alloy semisolid slurry metallographic microstructure signal that Figure 12 provides for the embodiment of the present invention three
Figure.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the present invention is described in further detail.
Embodiment one:
It (can be specifically light conjunction that the present embodiment illustrates employing air cooling puddler technology to prepare semi solid slurry
Gold semi solid slurry, it is also possible to be other kinds of metal semi-solid slurry), existing stirring technique can be improved
Deficiency, improve slurry prepare quality and production efficiency.Concrete, in the present embodiment semi-solid metal slurry
Material preparation facilities includes feeder, airway, puddler and for holding the carrying container of metal bath；
This carrying container can be crucible or other can bear the vessel of high temperature；This metal bath can be specifically
Magnesium alloy fused mass, aluminium alloy melt, kirsite melt and Composite Melt thereof etc.；Puddler stretches into carrying
In container, the one end in metal bath is stirring end, has cavity (inner chamber) inside stirring end, and feeder exists
Noted in stirring end internal cavities by airway when metal bath in carrying container is stirred by puddler
Enter and cool down gas, form cooling processing mode collaborative with stirring so that metal bath is in the process of stirring flowing
Middle internal temperature field distribution is substantially uniform and does not have obvious supercool gradient, destroys dendritic growth environment,
Thus obtain the semi solid slurry being uniformly distributed a certain proportion of nearly spherical nascent solid phase in liquid matrix.
Namely the puddler in the present embodiment has internal cavities, and this internal cavities at least extends to puddler
Stirring end.Exemplary explanation is carried out below with several concrete interior empty puddler structures, it should be understood that
It is to be not limited in following several structure.
Puddler 11 shown in Figure 1, puddler 11 is hollow structure, outer closures；And this stirring
Cavity 111 in the middle of bar 11 extends to stir end (for lower end in this example), to ensure cooling in the vertical
Gas can be injected into inside stirring end；Puddler 11 upper end (in theory can be arranged on stirring end with
On any part) be additionally provided with the blow vent 112 connected with cavity, during connection, the air intake of airway and confession
The gas outlet of device of air connects, and the gas outlet of airway and blow vent 112 are directly connected to or by this blow vent
112 stretch into cavity 111, and the cooling gas injected in cavity 111 flows out cavity 111 eventually through blow vent 112.
It should be appreciated that airway stretches into the degree of depth of cavity 111 and can adjust the most flexibly in this example
Whole setting, preferably extends into middle part or the middle and lower part of cavity 111 herein.
Puddler shown in Figure 2, puddler is by hollow sleeve 22 and to be arranged at hollow sleeve 22
The solid post 223 of center is constituted；Cavity 221 is formed between solid post 223 and hollow sleeve 22 inwall,
And this cavity 221 extends to the stirring end (for lower end in this example) of puddler in the vertical；To ensure cooling
Gas can be injected into inside stirring end；Puddler 11 upper end (in theory can be arranged on stirring end with
On any part) be additionally provided with the blow vent 222 connected with cavity, during connection, the air intake of airway and confession
The gas outlet of device of air connects, and the gas outlet of airway and blow vent 222 are directly connected to or by this blow vent
112 stretch into cavity 221, and the cooling gas injected in cavity 221 flows out cavity 221 eventually through blow vent 222.
It should be appreciated that in this example airway stretch into the degree of depth of cavity 221 can also be the most flexible
Adjust and arrange, preferably extend into middle part or the middle and lower part of cavity 221 herein.
Puddler 33 shown in Figure 3, puddler 33 lower end is stirring end, and stirring end is hollow structure
Having cavity 331, other parts of puddler 33 are then solid construction；More than the stirring end of puddler 33
Position is additionally provided with the blow vent 332 connected with cavity, and during connection, the air intake of airway goes out with feeder
QI KOU connects, and the gas outlet of airway and blow vent 332 are directly connected to or stretch into sky by this blow vent 332
Chamber 331, the cooling gas injected in cavity 111 flows out cavity 331 eventually through blow vent 332.Should manage
Solving, in this example, airway stretches into the degree of depth of cavity 331 and can also be adjusted flexibly according to actual needs and set
Put, preferably extend into middle part or the middle and lower part of cavity 331 herein.
It should be appreciated that the blow vent arranged on puddler in the present embodiment can be only used as air inlet use,
And other positions on puddler arrange at least one gas outlet identical with cavity for aerofluxus, setting
Position preferably ensure expellant gas can not enter carrying container in metal bath in.
Puddler in the present embodiment is preferably cylindrical, can also be adjusted to other the most according to actual needs
The puddler of shape.In the present embodiment puddler specifically can use rustless steel, graphite, cast iron, grinding tool steel or
The materials such as plated film copper alloy are made, and when the stirring end of puddler stretches in carrying container in metal bath, its
Angle between longitudinal axis and horizontal plane is 30 °～90 °, preferably 90 °.In the present embodiment, when leading
When puddler internal cavities is stretched into by gas injection port in the gas outlet of trachea, indulging of the airway part preferably extended into
Longitudinal axis parallel to axis with puddler stirring end.
In the present embodiment, when puddler internal cavities is stretched into by gas injection port in the gas outlet of airway, also may be used
Stretch at airway and at least one spray-hole communicated with airway pore is set on the sidewall of chamber portion, this
Time cooling gas by this spray-hole directly in puddler internal cavities injection cooling gas, with raising efficiency
And refrigeration；Now, it is also contemplated that the gas outlet bottom airway is closed and also may be used.It should be appreciated that
Cooling gas in the present embodiment can be the various gases that can be used for refrigeration, such as air or other cooling gas
Body.
In the present embodiment, in order to promote stirring efficiency and effect, also can be further at the stirring end of puddler
Arranging stirring vane on outer wall, this stirring vane could be arranged to one or more pieces, preferably at stirring end outer wall
On be uniformly distributed multi-disc stirring vane be set.
Semi-solid metal slurry preparation facilities in the present embodiment also includes mixing control device, with puddler even
Connecing, rotating speed during for controlling puddler stirring, such as can control this rotating speed is 0～1000r/min.
Semi-solid metal slurry preparation facilities in the present embodiment also includes temperature-detecting device, holds for detection
Carry the temperature of metal bath in container.This temperature-detecting device can be various temperature sensing circuit, such as may be used
To be the temperature sensing circuit comprising thermocouple；Metal in carrying container is detected by this temperature-detecting device
After the temperature of melt reaches preset temperature, can stop respectively with manual operation mixing control device and feeder
Agitation and supply, this temperature-detecting device also can be connected with mixing control device and feeder, with in detection
After the temperature of metal bath reaches preset temperature in carrying container, automatically control mixing control device and supply
Device stops agitation and supply respectively.
It should be appreciated that the various sizes of puddler and airway can be according to specifically in the present embodiment
Application scenarios is arranged flexibly, and the wall thickness that the most specifically can arrange puddler is 3mm～10mm；Airway interior
Footpath is 2mm～100mm；Feeder presses pre-set gas flow in puddler internal cavities by this airway
Injecting cooling gas, this pre-set gas flow is 0～1000L/min.
Embodiment two:
The present embodiment is on the semi-solid metal slurry preparation facilities shown in embodiment one, and example one utilizes should
Semi-solid metal slurry preparation facilities prepares the method for semi-solid metal slurry, and this semi-solid metal slurry is permissible
It it is the semi solid slurry of the types such as magnesium alloy, aluminium alloy, kirsite and composite thereof.The method refers to
Shown in Fig. 4, including:
Step 401: preparing metal bath in carrying container (is the most then through fusing, essence in carrying container
The processes such as refining obtain metal bath), maybe the metal bath prepared is added in carrying container；
Step 402: control in the stirring end of the puddler metal bath in carrying container according to preset rotation speed and
Direction is stirred, and feeder is pressed pre-set gas flow by airway and injected cooling gas in cavity,
Carry out with realization cooling and the collaborative of stirring；Preset rotation speed in this step is 0～1000r/min, presets gas
Body flow is 0～1000L/min；
Control puddler in this step can be controlled by mixing control device, under less demanding scene
Even can be with Non-follow control；Mixing direction can be from start to finish along a direction (such as clockwise or inverse time
Pin) carry out, it is also possible in whipping process, adjust rotation direction；
Step 403: after the metal bath in container to be lifted is cooled to predetermined temperature, puddler stops stirring,
And feeder stops injecting cooling gas in cavity；Specifically can be by temperature-detecting device detection carrying
The temperature of metal bath in container；The temperature of metal bath in carrying container is detected by this temperature-detecting device
After degree reaches preset temperature, agitation can be stopped respectively with manual operation mixing control device and feeder and supply
Gas, it is also possible to reach to preset temperature by temperature-detecting device temperature of metal bath in carrying container being detected
After degree, automatically control mixing control device and feeder stops agitation and supply respectively；It addition, this step
In predetermined temperature be set equal to the metallic object liquidus temperature t+ △ t of metal bath, the span of △ t
It it is 0 DEG C～100 DEG C.For example, it is assumed that metal bath is A356 aluminium alloy melt, corresponding A356 aluminium alloy
Liquidus temperature be 615 DEG C, predetermined temperature now be equal to 615 DEG C of+△ t, the span of △ t is
0 DEG C～100 DEG C.
Embodiment three:
In order to be better understood from the present invention, combine with a kind of concrete semi-solid metal slurry preparation facilities below
The metal solvent of several particular types carries out further exemplary illustration to the present invention.
Shown in Figure 5, this semi-solid metal slurry preparation facilities include feeder 1, airway 2,
The puddler 3 hollow stirrer bar of structure shown in Fig. 1 (this example use) and for holding metal bath 4
Crucible 5, the stirring end of puddler 3 stretches in the metal bath 4 in crucible 5, at the stirring end of puddler 3
It is provided with stirring vane 7, to promote stirring efficiency and effect；Also include for detecting metal bath 4 temperature
Thermocouple 6；In whipping process, utilize the principle of air cooling and stirring, supply dress while puddler 3 stirring
Put 1 internal cavities that cooling gas (such as air) is injected puddler 3 by airway 2, injection
Cooling gas flows out from the space between airway 2 and puddler 3 inwall, forms puddler 3 lasting cold
But, reach to accelerate metal bath 4 cool down and promote the effect of melt forming core, when metal bath 4 is cooled to pre-
After fixed temperature stop stirring and ventilation, just can obtain in liquid matrix be uniformly distributed a certain proportion of near spherical at the beginning of
The semi solid slurry of raw solid phase 8.This semi-solid metal slurry preparation facilities simple structure, application is convenient, effect
Rate is high, can the most quickly produce, safe and reliable, be applicable to multiple light-alloy and composite material semi-solid state slurry thereof
Material preparation, is particularly suitable for preparing big volume semi solid slurry and industrialized production.
With the course of processing of several concrete metal solvents the present invention done exemplary illustration below:
A356 aluminium alloy solution:
1, alloyage melt:
The liquidus curve of test A356 aluminium alloy and solidus temperature are respectively 615 DEG C and 556 DEG C, are closed by aluminum
Ingot is put in preheating temperature is the crucible electrical resistance furnace of 350 DEG C, treat aluminium alloy temperature be warmed up to 720 DEG C laggard
Row refine, bottom the hexachlorethane press-in melt after drying with bell jar, (addition is aluminium alloy gross weight
0.5%), and it is shaken gently for, carries out melt degasification, deslagging refining process, finally alloy melt is cooled to 650 DEG C
Rear insulation；
2, stirring cooling:
If puddler is disposed vertically, puddler rotating speed 200r/min, gas intake 245L/min, puddler
Wall thickness 3mm, puddler intracavity diameter 15mm, breather diameter 5mm, stirring vane is two panels tabular, ventilation
After stirring 25s, stopping stirring ventilation, now alloy melt temperature is in semi solid zone, its liquid matrix
In be uniform-distribution with a certain proportion of nearly spherical nascent solid phase, this stirring cooling procedure refers to shown in Fig. 6-8,
Nearly spherical nascent solid phase 8 is not also had in metal bath, stirring shown in Fig. 7 when initial stirring shown in Fig. 6 cools down
Gradually having nearly spherical nascent solid phase 8 to produce in metal bath after cooling a period of time, Fig. 8 show stirring
The a lot of near spherical nascent solid phase 8 produced in metal bath after 25s, so far A356 aluminium alloy semi-solid slurry
Material preparation complete, its slurry microscopic structure as it is shown in figure 9, average grain size is 61 μm, pattern rounding and
It is evenly distributed.
ADC12 aluminium alloy solution:
1, alloyage melt:
The liquidus curve of test ADC12 aluminium alloy and solidus temperature are respectively 580 DEG C and 515 DEG C, are closed by aluminum
Ingot is put in preheating temperature is the crucible electrical resistance furnace of 300 DEG C, treat aluminium alloy temperature be warmed up to 700 DEG C laggard
Row refine, bottom the hexachlorethane press-in melt after drying with bell jar, (addition is aluminium alloy gross weight
0.5%), and it is shaken gently for, carries out melt degasification, deslagging refining process, finally alloy melt is cooled to 630 DEG C
Rear insulation；
2, stirring cooling:
If puddler is disposed vertically, screw speed 300r/min, gas intake 245L/min, puddler wall
Thick 6mm, puddler intracavity diameter 15mm, breather diameter 5mm, stirring vane is two panels tabular, and ventilation is stirred
After mixing 20s, stopping stirring ventilation, now alloy melt temperature is in semi solid zone, in its liquid matrix
Even suspension a certain proportion of nearly spherical nascent solid phase, prepared by ADC12 aluminium alloy semi-solid slurry, its
As shown in Figure 10, average grain size is only 37 μm to slurry tissues, pattern rounding and being evenly distributed.
7075 aluminium alloy solutions:
1, alloyage melt:
Test is respectively 635 DEG C and 477 DEG C by liquidus curve and the solidus temperature of 7075 aluminium alloys, is closed by aluminum
Ingot is put in preheating temperature is the crucible electrical resistance furnace of 400 DEG C, treat aluminium alloy temperature be warmed up to 720 DEG C laggard
Row refine, bottom the hexachlorethane press-in melt after drying with bell jar, (addition is aluminium alloy gross weight
0.5%), and it is shaken gently for, carries out melt degasification, deslagging refining process, finally alloy melt is cooled to 660 DEG C
Rear insulation.
2, stirring cooling:
If puddler is disposed vertically, screw speed 100r/min, gas intake 245L/min, puddler wall
Thick 4mm, puddler intracavity diameter 15mm, breather diameter 5mm, stirring vane is two panels tabular, and ventilation is stirred
After mixing 20s, stopping stirring ventilation, now, alloy melt temperature is in semi solid zone, 7075 aluminium alloys
Prepared by semi solid slurry, as shown in figure 11, average grain size is 43 μm to its slurry tissues, pattern
Rounding and being evenly distributed.
AZ91D magnesium alloy fused mass:
1, alloyage melt:
The liquidus curve of test AZ91D magnesium alloy and solidus temperature are respectively 595 DEG C and 470 DEG C, are closed by aluminum
Ingot is put in preheating temperature is the crucible electrical resistance furnace of 350 DEG C, treat aluminium alloy temperature be warmed up to 700 DEG C laggard
Row refine, in fusion process, in stove, magnesium alloy uses argon and coverture protection, after scarfing cinder is clean, will close
Gold melt is cooled to 620 DEG C of insulations；
2, stirring cooling:
If puddler is disposed vertically, screw speed 200r/min, gas intake 123L/min, puddler wall
Thick 5mm, puddler intracavity diameter 15mm, breather diameter 5mm, stirring vane is two panels tabular, and ventilation is stirred
After mixing 25s, stopping stirring ventilation, now, alloy melt temperature is in semi solid zone, its liquid matrix
Middle even suspension a certain proportion of nearly spherical nascent solid phase, prepared by AZ91D magnesium alloy semisolid slurry,
As shown in figure 12, average grain size is 45 μm to its slurry tissues, pattern rounding and being evenly distributed.
Visible, the air cooling puddler continuous quickly preparing cement paste technology that the present invention provides is mechanical agitation pulping technique
Development and perfection further, combine together stirring with air cooling technology, are the semi-solid metal slurries of a kind of advanced person
Material technology of preparing, relative to prior art, it at least possesses advantages below:
1, this semi-solid metal slurry preparation facilities simple in construction, low cost, easy to use, can continuous-stable
Work, efficiency is high, it is adaptable to the semisolid of the types such as magnesium alloy, aluminium alloy, kirsite and composite thereof
The preparation of slurry, metal bath temperature, mixing speed, mixing time and gas intake can accomplish accurately to control
System, it is easy to industrialization promotion；
2, puddler is during lasting air cooling, accelerates metal bath cooling, promotes metal bath forming core,
Owing to stirring action, the temperature field of melt and concentration field can be rapidly achieved uniformity, solid half obtained
In state slurry, nascent solid phase pattern rounding, distribution and size are uniform；
3, by cooling down gas to internal injection of puddler, puddler completes uniform stirring simultaneously with fast
Speed refrigerating work procedure, compared to existing stirring technique, efficiency is high, small investment；Using ventilation cooling, safety can
Lean on；Airway can be inserted into puddler inner chamber, not with melt contacts, does not results in portion gas and is trapped in alloy
In melt, more do not result in putty buildup problem；
4, the cooling gas range of choice is wide, can select air, can be substantially reduced slurrying cost further, with
Time there is environmental friendliness feature；
5, this semi-solid metal slurry preparation facilities eliminates the Prepared by Low Superheat Pouring of complexity, greatly reduces liquid
The difficulty of phase line cast, it is easy to control；Eliminate traditional Double helix stirring, solve double-spiral structure and deposit
Poor in screw rod operating mode, consume height, the life-span is short, cleaning dismounting trouble, is suitable for the problem that alloys range is narrow；Take
The hang plate that disappeared cast and various running channels are poured into a mould, it is to avoid hang plate and a difficult problem for running channel surface sizing, are not required to
Frequently cleaning, time saving and energy saving.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to recognize
Determine the present invention be embodied as be confined to these explanations.Ordinary skill for the technical field of the invention
For personnel, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace,
All should be considered as belonging to protection scope of the present invention.
Claims (13)
1. a semi-solid metal slurry preparation facilities, it is characterised in that including: feeder, inducing QI
Pipe, puddler and for holding the carrying container of metal bath；Described puddler stretches into described carrying container
One end in middle metal bath is stirring end, has cavity inside described stirring end, and described feeder is used for
When described metal bath is stirred by described puddler by described airway to the internal sky of described stirring end
Intracavity injects cooling gas.
2. semi-solid metal slurry preparation facilities as claimed in claim 1, it is characterised in that described
Puddler is that the cavity of hollow structure and centre extends to described stirring end in the vertical；
Or by a hollow sleeve and the solid post being arranged at described hollow sleeve center in the middle of described puddler
Constitute, between described solid post and described hollow sleeve inwall, form cavity, and this cavity extends in the vertical
To described stirring end；
Or the stirring end of described puddler is hollow structure, other parts are solid construction.
3. semi-solid metal slurry preparation facilities as claimed in claim 2, it is characterised in that described
Puddler stirring end is additionally provided with the blow vent connected with described cavity, the air intake of described airway with upper bit
Being connected with the gas outlet of described feeder, the gas outlet of described airway is connected with described blow vent or passes through
Described blow vent stretches into described cavity, injects the cooling gas in described cavity eventually through described blow vent stream
Go out described cavity.
4. semi-solid metal slurry preparation facilities as claimed in claim 3, it is characterised in that described
When described cavity is stretched into by described gas injection port in the gas outlet of airway, described airway stretches into described cavity portion
Point sidewall be provided with the spray-hole communicated with airway pore, described cooling gas by described spray-hole to
Injection in described cavity.
5. the semi-solid metal slurry preparation facilities as described in any one of claim 1-4, its feature exists
In, the stirring end outer wall of described puddler is additionally provided with stirring vane.
6. the semi-solid metal slurry preparation facilities as described in any one of claim 1-4, its feature exists
When, the stirring end of described puddler stretches in described carrying container in metal bath, its longitudinal axis and water
Angle between plane is 30 °～90 °.
7. the semi-solid metal slurry preparation facilities as described in any one of claim 1-4, its feature exists
In, also include mixing control device, be connected with described puddler, during for controlling the stirring of described puddler
Rotating speed.
8. the semi-solid metal slurry preparation facilities as described in any one of claim 1-4, its feature exists
In, also include temperature-detecting device, for detecting the temperature of metal bath in described carrying container.
9. the semi-solid metal slurry preparation facilities as described in any one of claim 1-4, its feature exists
In, the internal diameter of described airway is 2mm～100mm.
10. the semi-solid metal slurry preparation facilities system utilized as described in any one of claim 1-9
The method of standby semi-solid metal slurry, it is characterised in that including:
In described carrying container, prepare metal bath, maybe the metal bath prepared is added described carrying and hold
In device；
According to preset rotation speed and direction in the stirring end metal bath in described carrying container of described puddler
It is stirred, and described feeder is pressed pre-set gas flow by described airway and injected in described cavity
Cooling gas；
After the metal bath in described carrying container is cooled to predetermined temperature, described puddler stops stirring,
Described feeder stops injecting cooling gas in described cavity.
11. methods preparing semi-solid metal slurry as claimed in claim 10, it is characterised in that institute
Stating preset rotation speed is 0～1000r/min.
12. methods preparing semi-solid metal slurry as described in claim 10 or 11, its feature exists
In, described pre-set gas flow is 0～1000L/min.
13. methods preparing semi-solid metal slurry as described in claim 10 or 11, its feature exists
In, described predetermined temperature is equal to the metallic object liquidus temperature t+ △ t of described metal bath, the value model of △ t
Enclose is 0 DEG C～100 DEG C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031678.0A CN105855498A (en) | 2015-01-21 | 2015-01-21 | Semisolid metal slurry preparation device and method |
| PCT/CN2015/098241 WO2016115954A1 (en) | 2015-01-21 | 2015-12-22 | Device and method for preparing semi-solid metal slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031678.0A CN105855498A (en) | 2015-01-21 | 2015-01-21 | Semisolid metal slurry preparation device and method |
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|---|---|
| CN105855498A true CN105855498A (en) | 2016-08-17 |
Family
ID=56416400
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510031678.0A Withdrawn CN105855498A (en) | 2015-01-21 | 2015-01-21 | Semisolid metal slurry preparation device and method |
Country Status (2)
| Country | Link |
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| CN (1) | CN105855498A (en) |
| WO (1) | WO2016115954A1 (en) |
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