CN100532596C - Method for preparing and rheologic molding semisolid alloy pulp - Google Patents
Method for preparing and rheologic molding semisolid alloy pulp Download PDFInfo
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- CN100532596C CN100532596C CNB2007100629776A CN200710062977A CN100532596C CN 100532596 C CN100532596 C CN 100532596C CN B2007100629776 A CNB2007100629776 A CN B2007100629776A CN 200710062977 A CN200710062977 A CN 200710062977A CN 100532596 C CN100532596 C CN 100532596C
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Abstract
This invention discloses a method for preparing and rheological-molding semi-solid alloy slurry. The method comprises: pouring overheated molten alloy into a crucible through a vertical snake-shaped channel, transferring the crucible with semi-solid alloy slurry into a temperature controller, post-cooling or controlling the temperature field of the semi-solid alloy slurry, pouring the semi-solid alloy slurry into the chamber of an extrusion-casting machine or a press-casting machine, or into the mold of a forging machine, pressing for molding, curing, demolding, and talking out the cast. The method has such advantages as simplified process, lowered energy consumption, shortened process flow, and lowered cost.
Description
Technical field
The invention belongs to the preparation and the field shaping technique of semi-solid alloy slurry, a kind of preparation and rheoforming method of semi-solid alloy slurry is provided especially, be applicable to the preparation and the moulding of semi-solid alloy slurry.
Background technology
Since the semi-solid alloy forming technique had been invented by the seventies initial stage Massachusetts Institute Technology (MIT), the preparation of semi-solid alloy slurry and forming technique caused the extensive concern and the research of various countries.According to document " Behavior of metal alloys in the semisolid state " (M C Flemings, MetallTrans, 1991,22A:957-981), " Method and apparatus for shaping semisolid metals " (A Mitsuru, S Hiroto, H Yasunori, et al, EP Patent, 0745694A1,1996), " A noveltechnique to produce metal slurries for semi-solid metal processing " (J Wannasin, R A Martinez, M C Flemings, [in] Proc of the 9th Int.Conf.of Semi-SolidProcessing of Alloys and Composites, Busan Korea, 2006, p.366-369), " Rheocasting processes for semi-solid casting of aluminum alloys " (S P Midson, Die Casting Engineer, 2006,50 (1): 48-51), " preparation method of semi-solid-state metal and alloy pulp or blank " (Mao Weimin, Chinese patent, 200410009296.X, 2004) and " metallic substance semi-solid processing theory and technology " (write: Kang Yonglin, Mao Weimin, Hu Zhuanqi, Science Press, 2004) report, the method that obtains semi-solid alloy slurry is a lot, as mechanical mixing method, electromagnetic stirring method, the melt activation method that strain causes (strain induced melt activation), grain refining and remelting process, the turbulence effect method, the simple helix paddling process, the duplex paddling process, low overheat tilted plate casting, low overheat cast and light current magnetic paddling process, low overheat cast and weak mechanical mixing method, the melt-mixing method, control cast height method, gas blow mixing method etc.Equally, above-mentioned document has also proposed the rheoforming method of many semi-solid alloy slurries, as traditional mechanical agitation type rheoforging, injection chamber prepares slurry formula rheoforging, simple helix mechanical agitation type rheoforging, duplex mechanical agitation type rheoforging, low overheat tilted plate cast-type rheoforging, low overheat cast and weak mechanical agitation type rheoforging, low overheat cast and light current magnetic stirring-type rheoforging, SLC formula (Sub-Liquidus Casting) rheoforging, CRP formula (Continuous RheoconversionProcess) rheoforging, SEED formula (Swirled Enthalpy Equilibation Device) rheoforging, CSIR formula (The Council for Science and industrial Research) rheoforging.But for preparation and the moulding cost that reduces semi-solid alloy slurry, the scholar of countries in the world, expert and industry member attempt to propose the preparation and the forming technique of new semi-solid alloy slurry still in continuous effort.
Prepare in the semi-solid alloy slurry method in induction stirring, No. 4229210, the U.S. and No. 4434837 patents require and must carry out the intensive induction stirring to alloy melt, and promptly the power of induction stirring is very big, and the shearing rate that stirring is produced is generally at 500～1500S
-1Under such shearing rate, the speed of rotation that is stirred alloy liquid is very high, generally all surpasses 500 rev/mins, at this moment could obtain tiny and semi-solid alloy slurry or blank ring initial crystal, thereby the preparation cost of blank is higher.If shearing rate is less than 500S
-1, the form variation of primary crystal mostly is the rosiness primary crystal, and the dendrite layer of semi-solid alloy slurry or blank surface is thicker, and this semi-solid alloy blank is unsuitable for semi-solid die casting.
No. 3902544,3948650,3954455, United States Patent (USP) and document " Rheocasting " (M CFlemings, R G Riek and K P Young, Materials Science and engineering, 1976, all mention 25:103-117), the mechanical stirring method of preparation semi-solid alloy slurry all adopts the intensive mechanical stirring.The mechanical stirring method utilizes rotating paddle or the stirring rod nascent solid phase dendrite in will solidifying to smash, and obtains semi-solid alloy slurry.In stirring, the relative rotation speed of these churned mechanically blades and stirring rod is all very high, and is general all more than 500 rev/mins, even above 10000 rev/mins.Under so high stir speed (S.S.), the life-span of teeter column and stirring rod is not long, pollutes ring initial crystal semi-solid alloy pulp or blank easily, reduces the internal soundness of semi-solid alloy slurry or blank.
Document " Semi-solid processing of engineering alloys by a twin-screwrheomolding process. " (S Ji, Z Fan and M J Bevis, Mater Sci ﹠amp; Eng, 2001,299A:210-217) propose: the equipment that casting is penetrated in the rheology of duplex mechanical stirring mainly comprises liquid magnesium alloy feeding machanism, duplex mechanical stirring mechanism, injection mechanism and central controlling organization.Feeding machanism can guarantee to provide temperature the suitable and suitable liquid magnesium alloy of quantity to duplex mechanical stirring mechanism; In a single day liquid magnesium alloy enters stirring system, by duplex agitation vat consumingly sheared on one side, be quickly cooled to the fraction solid of expection on one side; When the semi-solid magnesium alloy slurry arrived transfer valve, nascent solid phase had changed spherical particle into, and is evenly distributed in low-melting liquid phase; When transfer valve was opened, the semi-solid magnesium alloy slurry entered injection chamber, is pressed into mold cavity, and solidifies fully in mould, finally formed mechanical component.But the semi-solid rheological moulding that casting machine only is suitable for magnesium alloy is penetrated in the rheology of this duplex mechanical stirring.
Document " Liquidus Casting Aluminum Alloy 2618 microstructures " (Liu Dan, Cui Jianzhong, Xia Kenong. the journal .1999 of Northeastern University, 20 (2): 173-176) propose: under non-agitation condition, only utilize the control teeming temperature, also can prepare semi-solid alloy slurry, this method is called as the liquidus line casting, but the teeming temperature that this method requires alloy liquid is very near the liquidus temperature of this alloy liquid, promptly high 1～5 ℃ than this liquidus temperature, could obtain semi-solid alloy slurry, this makes the control of large vol alloy liquid temp become very difficult, the flowability of alloy liquid is variation also, especially is difficult to realize technological operation in low heat conductivity alloy liquid or continuous casting.If improve the teeming temperature of alloy liquid, the spherical-like morphology of primary crystal can worsen, spherical rosiness or the dendritic crystal state of changing into when pouring into a mould by liquidus line, the thixotropy of this semi-solid alloy slurry is very poor, distortion during semi-solid-state shaping is inhomogeneous, be prone to the liquid-solid phase segregation, be unfavorable for very much the semi-solid state moulding of alloy.
Chinese patent 00109540.4 has proposed a kind of method for preparing semi-solid alloy slurry or blank; being about to low over-drastic alloy liquid directly pours in mold or the continuous cast mold; simultaneously this is crossed thermalloy liquid and carry out weak stirring; just can prepare semi-solid alloy slurry or blank; and this semi-solid alloy slurry or blank are pure; can not be subjected to the pollution of preparation facilities; therefore this preparation method's facility investment is lower; the preparation cost of semi-solid alloy slurry or blank is lower; semi-solid alloy slurry is convenient to various rheoforgings, and the semi-solid alloy blank is convenient to various thixotroping moulding.But this method also needs special electromagnetic stirring equipment or mechanical stirring equipment when the preparation semi-solid alloy slurry, the formation complexity of integral device, and preparation technology is cumbersome.
European patent EP 0745691A1 has proposed New Rheocasting technology, is called for short NRC.In the NRC technology, at first reduce the superheating temperature of cast alloy, alloy liquid is poured on the tilt flat plate (or inclination pipe or inclination semicircle pipe), alloy melt flows into collects crucible, pass through suitable cooled and solidified again, at this moment the nascent solid phase in the semi-solid alloy melt just is spherical, be evenly distributed in low-melting remaining liquid phase, at last the alloy pulp of collecting in the crucible is carried out the temperature adjustment, to obtain uniform temperature field or fraction solid as far as possible, finally obtain semi-solid alloy slurry.This semi-solid alloy slurry is carried out rheo-diecasting or forging, with regard to plastic various parts.But the angle of inclination of this tilted plate is less, generally between 30～60 degree (angle of tilt flat plate and horizontal direction), sticks alloy melt easily, needs constantly cleaning, also wastes alloy.
Document " Idra Prince Rheocasting and Squeeze Casting Technology " (J Yueko, Die Casting Engineer, 2002, (4): 20-23) point out: people such as the Martinez of Massachusetts Institute Technology (MIT) and Flemings have proposed a kind of new rheoforging technology.The core concept of this technology is: the alloy liquid of low overheat is poured into (this crucible internal diameter size is fit to the injection chamber size of pressure die-casting machine) in the spare-crucible, utilize the copper rod of plated film that the alloy liquid in the crucible is carried out weak in short-term mechanical stirring, alloy melt is cooled to below the liquidus temperature, remove the stirring copper rod then, the temperature or the fraction solid that allow semi-solid alloy melt in the crucible be cooled to be scheduled to have just obtained semi-solid alloy slurry.This semi-solid alloy slurry is carried out rheo-diecasting or forging, with regard to plastic various parts.But this method also needs special mechanical stirring equipment when the preparation semi-solid alloy slurry, the formation complexity of integral device, and preparation technology is cumbersome.
What require emphasis especially a bit is, more than various preparation semi-solid alloy slurries and rheoforging technology oneself characteristics are all arranged, also all there is deficiency separately, still needs to propose the preparation and the forming technique of new semi-solid alloy slurry, so that simplify technology, reduce production costs.
Summary of the invention
The object of the present invention is to provide a kind of preparation and rheoforming method of semi-solid alloy slurry.Realized that preparation technology is simple, less investment, production cost be low, is fit to very much the preparation and the moulding production of semi-solid alloy slurry and blank.
The present invention pours into mistake thermalloy liquid in the vertical snakelike running channel, this is crossed thermalloy liquid and flows downward along the inwall of this snakelike running channel, flow into again in non-magnetic metal (being that relative magnetic permeability is about 1 metal) or the nonmetallic cylindrical or polygon prismatic spare-crucible, just can obtain semi-solid alloy slurry after this alloy melt partial coagulation; Control the follow-up speed of cooling of this alloy pulp simultaneously, accurately the fraction solid or the temperature of control semi-solid alloy slurry are directly delivered to pressure die-casting machine or extrusion casting machine or swaging machine moulding with the semi-solid alloy slurry of this fraction solid or the corresponding temperature of this fraction solid then; Or make the alloy melt that flows through this snakelike running channel no longer flow into spare-crucible, but flow directly in the injection chamber of pressure die-casting machine or extrusion casting machine or in the forging die of swaging machine, again rheo-diecasting moulding or rheology extrusion casting moulding or rheology forging and molding.This preparation tissue morphology simple with moulding process, semi-solid alloy is good, production cost is low, is fit to very much the preparation and the moulding of semi-solid alloy slurry.Or after this alloy melt flows into this spare-crucible, can further solidify fully, can obtain the blank of this semi-solid alloy, this blank can be used as the original blank of semi-solid die casting; Or this alloy liquid flows into continuous cast mold after flowing through snakelike running channel again, casts out the blank of this semi-solid alloy continuously, and this blank can be used as the original blank of semi-solid die casting.
Concrete technology of the present invention is as follows:
1, produces superheated alloy liquid, this temperature of crossing thermalloy liquid is controlled at its more than liquidus temperature 0～250 ℃ in advance, to be somebody's turn to do thermalloy liquid pours in the vertical snakelike running channel, this is crossed thermalloy liquid and flows downward along the inwall of this snakelike running channel, flows in non-magnetic metal (being that relative magnetic permeability is about 1 metal) or the nonmetallic cylindrical or polygon prismatic spare-crucible again.
2, the height of this vertical snakelike running channel is 100～1000mm; The diameter of snakelike running channel is 5～100mm, and the inside arc bend of snakelike running channel is 1～10; The material of snakelike running channel can be nonmetal or metal; The inwall of snakelike running channel can be brushed low thermal conductivity liner, and the thickness of this low thermal conductivity liner is 0.2～2mm; When pouring into a mould thermalloy liquid, the temperature of snakelike running channel is lower than the solidus temperature of this alloy liquid, snakelike running channel can be preheated or force cooling, its preheating can be adopted resistance wire type of heating or electromagnetic induction heating mode or gas heating mode, and it forces cooling can adopt recirculated water cooling or air-flow cooling or the cooling of other fluid.
3, after cast, the semi-solid alloy slurry in this spare-crucible and this spare-crucible is moved in the temperature regulator together.Be provided with heating unit and cooling element in this temperature regulator, can control the follow-up speed of cooling or the temperature field of semi-solid alloy slurry, making this semi-solid alloy slurry reach predetermined 0.2～0.7 fraction solid maybe should predetermined corresponding alloy pulp temperature of fraction solid.The follow-up speed of cooling of this semi-solid alloy slurry is 1～50 ℃/min; Finally make the temperature field of this semi-solid alloy slurry even, the temperature head of the edge of this semi-solid alloy slurry and heart portion is ± 1～5 ℃; Follow-up cooling or temperature field that heating unit in this temperature regulator is controlled semi-solid alloy slurry by the resistance heat or the electromagnetic induction heat of its generation; Cooling element in this temperature regulator passes to air at room temperature or room temperature argon gas or SF
6With the mixture of other gas, or pass to tap water or other cooling liqss, control the follow-up cooling or the temperature field of semi-solid alloy slurry with this.
5, will reach semi-solid alloy slurry that predetermined 0.2～0.7 fraction solid maybe should the predetermined corresponding temperature of fraction solid and send in the forging die of the injection chamber of pressure die-casting machine or extrusion casting machine or swaging machine, carry out rheo-diecasting or rheology extrusion casting or rheology forging molding; When in this die-casting die, maybe in this extruding cast or after the semi-solid alloy slurry in this forging die solidifies fully, open form is taken out this die casting or this squeeze casting or this forging, has just finished rheo-diecasting or rheology extrusion casting or rheology forging process.
6 or make the alloy melt that flows through snakelike running channel no longer flow into spare-crucible, but flow directly in the forging die of the injection chamber of pressure die-casting machine or extrusion casting machine or swaging machine, injection molding or forging molding again; When in this die-casting die, maybe in this extruding casting mold or after this semi-solid alloy slurry in this forging die solidifies fully, open form is taken out this die casting or this squeeze casting or this forging, has just finished rheo-diecasting or rheology extrusion casting or forging process.
7, in spare-crucible and snakelike running channel, can feed the oxidation that alloy liquid was avoided or reduced to shielding gas; This shielding gas can be argon gas or nitrogen, helium or SF
6
8, after alloy melt flows into spare-crucible, can further solidify fully, can obtain the blank of semi-solid alloy, this blank can be used as the original blank of Semi-Solid Thixoforming moulding; Or this alloy liquid flows directly into continuous cast mold after flowing through snakelike running channel inwall again, casts out the blank of semi-solid alloy continuously, and this blank can be used as the original blank of Semi-Solid Thixoforming moulding.
The invention has the advantages that: the superheating temperature of control alloy liquid is 0～250 ℃, to be somebody's turn to do thermalloy liquid and pour into (temperature of snakelike running channel is lower than this solidus temperature of crossing thermalloy liquid) in the vertical snakelike running channel, crossing thermalloy liquid flows downward along the inwall of snakelike running channel, flow into again in non-magnetic metal (being that relative magnetic permeability is about 1 metal) or the nonmetallic cylindrical or polygon prismatic spare-crucible, this method has been cancelled complicated simple induction stirring or mechanical stirring equipment, complicated low overheat cast and induction stirring in the weak stirring preparation or mechanical stirring equipment have also been cancelled, also greatly reduce the difficulty of liquidus line casting and tilted plate cast, be difficult for sticking alloy melt, also significantly reduced the preparation energy consumption, simplified the preparation process of semi-solid alloy slurry, can obtain good semi-solid alloy slurry equally, obviously reduce the preparation cost of semi-solid alloy slurry.These semi-solid alloy slurries are through follow-up cooling or controlled temperature field, making this semi-solid alloy slurry reach predetermined 0.2～0.7 fraction solid maybe should predetermined corresponding temperature of fraction solid, the semi-solid alloy slurry that will reach this predetermined fraction solid or temperature is sent in the forging die of the injection chamber of pressure die-casting machine or extrusion casting machine or swaging machine, carries out rheo-diecasting or rheology extrusion casting or rheology forging molding.Perhaps, make the alloy melt that flows through snakelike running channel no longer flow into spare-crucible, but flow directly in the injection chamber of pressure die-casting machine or extrusion casting machine or in the forging die of swaging machine, directly carry out rheo-diecasting moulding or rheology extrusion casting moulding or rheology forging molding.This rheo-diecasting moulding or this rheology extrusion casting moulding or this rheology forging molding have shortened the thixotroping moulding process flow process of semi-solid alloy greatly, have also reduced facility investment significantly, have finally reduced the production cost of semi-solid alloy profiled member.Preparation semi-solid alloy slurry technology of the present invention is the preparation of a crucible one crucible, the conveying of semi-solid alloy slurry is easy to realize, it is higher that the liquid phase fraction of slurry can also be controlled, the very complicated parts blank of being convenient to be shaped, and that the liquid phase fraction of conventional semi-solid alloy thixotroping shaping blank can not be controlled is too high, moulding is difficulty relatively during complicated shape very, otherwise the carrying of blank is difficult to realize technological operation.Technology of the present invention makes gating system, the waste product behind the semi-solid alloy slurry rheoforging will be directly in this workshop reuse, reduce the production cost of semi-solid alloy rheological moulding, and gating system, waste product after the conventional semi-solid alloy blank thixotroping moulding must turn back to the factory that blank prepares workshop or blank supplier, have increased the production cost of semi-solid alloy thixotroping moulding.
Description of drawings
Fig. 1 is the quenching structure of the semi-solid state ZL101A aluminium alloy size for preparing of the present invention, and light areas is spherical primary-Al, and darker regions is the eutectic liquid that solidifies.
Fig. 2 is the quenching structure of the semi-solid state ZL101A aluminium alloy size behind the controlled chilling of the present invention, and light areas is spherical primary-Al, and darker regions is the eutectic liquid that solidifies.
Fig. 3 is the quenching structure of the semi-solid state ZL101A aluminium alloy size for preparing of the present invention, and light areas is spherical primary-Al, and darker regions is the eutectic liquid that solidifies.
Embodiment
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 15 ℃ (being that teeming temperature is 630 ℃), the height of vertical snakelike running channel is that 100mm, internal diameter are 10mm, the inside arc bend of snakelike running channel is 1, and the material of this snakelike running channel is a graphite.Overheated 15 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, can obtain semi-solid state ZL101A aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL101A aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL101A aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 15 ℃ (being that teeming temperature is 630 ℃), the height of vertical snakelike running channel is that 300mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 2, and the material of this snakelike running channel is a graphite.Overheated 15 ℃ ZL10iA aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, can obtain semi-solid state ZL101A aluminium alloy size, it is organized as shown in Figure 1; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃, it is organized as shown in Figure 2; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL101A aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of a cold-chamber die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL101A aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 85 ℃ (being that teeming temperature is 700 ℃), the height of vertical snakelike running channel is that 800mm, internal diameter are 50mm, the inside arc bend of snakelike running channel is 5, and the material of this snakelike running channel is a graphite; In this ZL101A aluminum alloy melt process of cast, utilize this snakelike running channel of watercooling jacket cooling of outer edge.Overheated 85 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, can obtain semi-solid state ZL101A aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃, its tissue and Fig. 2 are similar; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL101A aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL101A aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 250 ℃ (being that teeming temperature is 865 ℃), the height of vertical snakelike running channel is that 1000mm, internal diameter are 35mm, the inside arc bend of snakelike running channel is 10, and the material of this snakelike running channel is a graphite; In this ZL101A aluminum alloy melt process of cast, utilize this snakelike running channel of watercooling jacket cooling of outer edge, and in this snakelike running channel, be blown into the protection argon gas, the flow of argon gas is 3 liters of per minutes.Overheated 250 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, can obtain semi-solid state ZL101A aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃, its tissue and Fig. 2 are similar; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL101A aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL101A aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, the material of this snakelike running channel is a copper alloy, the thick zircon flour coating of channel inner surface brushing one deck 0.5mm.This overheated 45 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, can obtain semi-solid state ZL101A aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃, its tissue and Fig. 2 are similar; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL101A aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's vertical die-casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL101A aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL117 aluminium alloy (the being hypereutectic Al-20wt%Si-1.8wt%Cu-1.0wt%RE aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 695 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.Before this ZL117 aluminum alloy melt of cast, utilize and be wrapped in snakelike this snakelike running channel of resistance wire preheating that waters pipeline outer wall, make its temperature remain on 200 ℃.This overheated 45 ℃ ZL117 aluminum alloy melt is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL117 aluminum alloy melt, can obtain semi-solid state ZL117 aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL117 aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL117 aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL117 aluminium alloy is controlled at predetermined scope, promptly 0.2～0.6 maybe this semi-solid state ZL117 aluminium alloy size temperature is controlled at 580～590 ℃; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL117 aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state ZL117 aluminium alloy size of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZL117 aluminium alloy size of 580～590 ℃ of this predetermined fraction solid 0.2～0.6 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL117 aluminium alloy size in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of a ZL117 aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is 2024 aluminium alloys (the being the Al-4wt%Cu-1.5wt%Mg-0.6wt%Mn aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 683 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, the material of this snakelike running channel is a copper alloy, the thick zircon flour coating of channel inner surface brushing one deck 0.5mm.2024 aluminum alloy melts that this is overheated 45 ℃ directly pour in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when 2024 aluminum alloy melt partial coagulations, can obtain semi-solid state 2024 aluminium alloy sizes; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state 2024 aluminium alloy sizes, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state 2024 aluminium alloy sizes wherein, speed of cooling is 1 ℃/min, the fraction solid of these semi-solid state 2024 aluminium alloys is controlled at predetermined scope, promptly 0.2～0.7 maybe these semi-solid state 2024 aluminium alloy size temperature are controlled at 540～610 ℃, its tissue and Fig. 2 are similar; In the process of this slurry cooling or controlled temperature field, the edge of these semi-solid state 2024 aluminium alloy sizes and the temperature head of heart portion are less than ± 1 ℃; So far, semi-solid state 2024 aluminium alloy sizes of suitable semi-solid rheological die casting finish with regard to preparation.Pour semi-solid state 2024 aluminium alloy sizes of 540～610 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 5～8 seconds (semi-solid state 2024 aluminium alloy sizes in this moment this die-casting die solidify fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of one time 2024 aluminium alloy.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.Overheated this ZL101A aluminum alloy melt of 45 ℃ is directly poured in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZL101A aluminum alloy melt, get final product semi-solid state ZL101A aluminium alloy size; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZL101A aluminium alloy size, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZL101A aluminium alloy size wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state ZL101A aluminium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZL101A aluminium alloy size temperature is controlled at 580～600 ℃, its tissue and Fig. 2 are similar; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZL101A aluminium alloy size and the temperature head of heart portion are less than ± 3 ℃; So far, being fit to the forged semi-solid state ZL101A aluminium alloy size of semi-solid state stream rheology finishes with regard to preparation.The semi-solid state ZL101A aluminium alloy size of 580～600 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures is poured in the forging die of a swaging machine, again forging molding; The injection chamber preheating temperature of this swaging machine is 250 ℃, and the preheating temperature of this forging die is 300 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZL101A aluminium alloy size in this moment this forging die solidifies fully), this forging is taken out in die sinking, has just finished the rheology forging process of a semi-solid state ZL101A aluminium alloy.
SF 1%
6Gas shield under, utilizing resistance melting furnace to produce superheating temperature is AZ91D magnesium alloy (the being the Mg-9wt%Al-0.7wt%Zn magnesium alloy) liquid of 45 ℃ (being that teeming temperature is 640 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite; In this AZ91D liquid magnesium alloy process of cast, in this snakelike running channel, be blown into 1% SF
6Shielding gas, SF
6The flow of gas is 0.03 liter of a per minute.The AZ91D liquid magnesium alloy that this is overheated 45 ℃ directly pours in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of SiC pottery, when the partial coagulation of AZ91D liquid magnesium alloy, can obtain semi-solid state AZ91D magnesium alloy slurry; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state AZ91D magnesium alloy slurry, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state AZ91D magnesium alloy slurry wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state AZ91D magnesium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state AZ91D magnesium alloy slurry temperature is controlled at 495～558 ℃; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state AZ91D magnesium alloy slurry and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state AZ91D magnesium alloy slurry that is fit to semi-solid rheological die casting finishes with regard to preparation, and it is organized as shown in Figure 6.Pour the semi-solid state AZ91D magnesium alloy slurry of 495～558 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 250 ℃, and the preheating temperature of this die-casting die is 300 ℃; When holding when pressing 3～6 seconds (the semi-solid state AZ91D magnesium alloy slurry in this moment this die-casting die solidifies fully), but open form is taken out this die casting, has just finished the rheo-diecasting process of an AZ91D magnesium alloy.
SF 1%
6Gas shield under, utilizing resistance melting furnace to produce superheating temperature is the Mg-2.5wt%Nd-0.7wt%Zr liquid magnesium alloy of 45 ℃ (being that teeming temperature is 685 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 25mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite; In this Mg-2.5wt%Nd-0.7wt%Zr liquid magnesium alloy process of cast, in this snakelike running channel, be blown into 1% SF
6Shielding gas, SF
6The flow of gas is 0.03 liter of a per minute.The Mg-2.5wt%Nd-0.7wt%Zr liquid magnesium alloy that this is overheated 45 ℃ directly pours in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of no nickel steel matter, when the partial coagulation of Mg-2.5wt%Nd-0.7wt%Zr liquid magnesium alloy, can obtain semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry wherein, speed of cooling is 5 ℃/min, the fraction solid of this semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry temperature is controlled at 577～622 ℃; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry and the temperature head of heart portion are less than ± 3 ℃; So far, the semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry that is fit to semi-solid rheological extrusion casting finishes with regard to preparation, and its tissue and Fig. 6 are similar.Pour the semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry of 577～622 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of an extrusion casting machine, injection molding again; The injection chamber preheating temperature of this extrusion casting machine is 250 ℃, and the preheating temperature of this extruding casting mold is 300 ℃; When holding when pressing 3～6 seconds (the semi-solid state Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy slurry in this moment this extruding casting mold solidifies fully), but open form is taken out this squeeze casting, has just finished the rheology extrusion casting process of a Mg-2.5wt%Nd-0.7wt%Zr magnesium alloy.
Utilizing resistance melting furnace to produce superheating temperature is that 45 ℃ ZA27-2 (is the Zn-27wt%Al-2.0wt%Cu-0.015wt%Mg zinc alloy, teeming temperature is 532 ℃) zinc liquid, the height of vertical snakelike running channel is that 400mm, internal diameter are 20mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.The ZA27-2 zinc liquid that this is overheated 45 ℃ directly pours in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, when the partial coagulation of ZA27-2 zinc liquid, can obtain semi-solid state ZA27-2 zinc alloy slurry; This spare-crucible is moved in the temperature regulator together with wherein semi-solid state ZA27-2 zinc alloy slurry, this temperature regulator is made of the intermediate frequency induction loop of 1000Hz, control its power so that this spare-crucible further cools off or control the temperature field of slurry together with semi-solid state ZA27-2 zinc alloy slurry wherein, speed of cooling is 2 ℃/min, the fraction solid of this semi-solid state ZA27-2 zinc alloy is controlled at predetermined scope, promptly 0.2～0.7 maybe this semi-solid state ZA27-2 zinc alloy slurry temperature is controlled at 408～464 ℃; In the process of this slurry cooling or controlled temperature field, the edge of this semi-solid state ZA27-2 zinc alloy slurry and the temperature head of heart portion are less than ± 5 ℃; So far, the semi-solid state ZA27-2 zinc alloy slurry of suitable semi-solid rheological die casting finishes with regard to preparation.Pour the semi-solid state ZA27-2 zinc alloy slurry of 408～464 ℃ of this predetermined fraction solid 0.2～0.7 or preset temperatures into the injection chamber of cold house's horizontal plunger die casting machine, injection molding again; The injection chamber preheating temperature of this pressure die-casting machine is 200 ℃, and the preheating temperature of this die-casting die is 200 ℃; When holding when pressing 5～8 seconds (the semi-solid state ZA27-2 zinc alloy slurry in this moment this die-casting die solidifies fully), open form is taken out this die casting, has just finished the rheo-diecasting process of a ZA27-2 zinc alloy.With superheating temperature is that 45 ℃ ZA8-1 (is the Zn-8wt%Al-1.0wt%Cu-0.02wt%Mg zinc alloy, teeming temperature is 449 ℃) zinc liquid pours in this snakelike running channel, and flow into along the inwall of this snakelike running channel in the cylindrical spare-crucible of the stainless steel of Austenitic, the semi-solid state zinc alloy slurry that has also prepared fraction solid 0.2～0.7, and the success carrying out the rheo-diecasting moulding.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 600mm, internal diameter are 30mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.Overheated 45 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow out downwards, flow directly into the injection chamber of pressure die-casting machine again, immediately die cast along the inwall of this snakelike running channel; The injection chamber preheating temperature of pressure die-casting machine is 250 ℃, and the preheating temperature of die-casting die is 300 ℃; After the semi-solid alloy slurry in the die-casting die solidified fully, open form was taken out this die casting, had just finished the rheo-diecasting process one time.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 600mm, internal diameter are 30mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.Overheated 45 ℃ ZL101A aluminum alloy melt is directly poured in this snakelike running channel, and flow out downwards, flow directly into the injection chamber of extrusion casting machine again, immediately injection molding along the inwall of this snakelike running channel; The injection chamber preheating temperature of extrusion casting machine is 250 ℃, and the preheating temperature of extruding casting mold is 300 ℃; After the semi-solid alloy slurry in the extruding casting mold solidified fully, open form was taken out this squeeze casting, had just finished rheology extruding casting process.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 600mm, internal diameter are 30mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.The ZL101A aluminum alloy melt that this is overheated 45 ℃ directly pours in this snakelike running channel, and flows out downwards along the inwall of this snakelike running channel, flows directly into the injection chamber of swaging machine again, immediately forging molding; The injection chamber preheating temperature of this swaging machine is 250 ℃, and the preheating temperature of this forging die is 300 ℃; After the semi-solid alloy slurry in the forging die solidified fully, open form was taken out this forging, had just finished the rheology forging process one time.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 400mm, internal diameter are 20mm, the inside arc bend of snakelike running channel is 3, and the material of this snakelike running channel is a graphite.The ZL101A aluminum alloy melt that this is overheated 45 ℃ directly pours in this snakelike running channel, and flows in the spare-crucible of the stainless steel of Austenitic along the inwall of this snakelike running channel, and the speed of cooling of this ZL101A aluminium alloy melt is 50 ℃/min.When the ZL101A aluminum alloy melt solidifies fully, can obtain semi-solid state ZL101A aluminum alloy blank, it is organized as shown in Figure 3; This blank can be used for semi-solid state ZL101A aluminium alloy thixotroping moulding.
Utilizing resistance melting furnace to produce superheating temperature is ZL101A aluminium alloy (the being hypoeutectic Al-7wt%Si-0.45wt%Mg aluminium alloy) liquid of 45 ℃ (being that teeming temperature is 660 ℃), the height of vertical snakelike running channel is that 900mm, internal diameter are 90mm, the inside arc bend of snakelike running channel is 6, and the material of this snakelike running channel is a graphite; In this ZL101A aluminum alloy melt process of cast, utilize this snakelike running channel of watercooling jacket cooling of outer edge, and in this snakelike running channel, be blown into the protection argon gas, the flow of argon gas is 3 liters of per minutes.The ZL101A aluminum alloy melt that this is overheated 45 ℃ directly pours in this snakelike running channel, and to flow into internal diameter along the inwall of this snakelike running channel be in the continuous cast mold of 75mm, when ZL101A aluminium alloy base shell is solidified to the thickness of 20mm, speed with per minute 500mm pulls out crystallizer with this continuously cast bloom, further water spray cools off and solidifies fully, just can obtain semi-solid state ZL101A aluminium alloy continuous casting material, its tissue and Fig. 3 are similar; This continuous casting material can be used for semi-solid state ZL101A aluminium alloy thixotroping moulding.
Claims (14)
1, a kind of preparation of semi-solid alloy slurry and rheoforming method is characterized in that:
A. will cross thermalloy liquid and pour in the vertical snakelike running channel, this superheated alloy liquid flows downward along the inwall of this snakelike running channel, flows in the spare-crucible, just forms semi-solid alloy slurry after this alloy melt partial coagulation;
B. after cast, move into the semi-solid alloy slurry in spare-crucible and this spare-crucible in the temperature regulator together, the follow-up cooling or the controlled temperature field of control semi-solid alloy slurry, the temperature field that makes this semi-solid alloy slurry are evenly and reach predetermined fraction solid or the corresponding slurry temperature of this fraction solid;
C. the semi-solid alloy slurry that will be scheduled to fraction solid or the corresponding temperature of this fraction solid is poured the injection chamber of pressure die-casting machine or extrusion casting machine, injection molding again into; After this semi-solid alloy slurry in the casting mold solidified fully when die-casting die or extruding, open form was taken out this die casting or squeeze casting, had just finished rheo-diecasting or extrusion casting process;
Maybe will be scheduled to the semi-solid alloy slurry of fraction solid or the corresponding temperature of this fraction solid and pour in the forging die of swaging machine, again forging molding; After this semi-solid alloy slurry in the forging die solidified fully, forging was taken out in die sinking, has just finished the rheology forging process one time.
2, according to claims 1 described method, it is characterized in that: after cast, move into the semi-solid alloy slurry in spare-crucible and this spare-crucible in the temperature regulator together; Be provided with heating unit and cooling element in this temperature regulator, the follow-up cooling or the temperature field of control semi-solid alloy slurry make this semi-solid alloy slurry reach the temperature of pairing this semi-solid alloy slurry of 0.2～0.7 fraction solid that predetermined 0.2～0.7 fraction solid maybe should be predetermined.
3, according to claims 1 or 2 described methods, it is characterized in that: the follow-up speed of cooling of this semi-solid alloy slurry is 1～50 ℃/min; Finally make the temperature field of this semi-solid alloy slurry even, the temperature head of the edge of this semi-solid alloy slurry and heart portion is ± 1～5 ℃; Follow-up cooling or temperature field that heating unit in this temperature regulator is controlled semi-solid alloy slurry by the resistance heat or the electromagnetic induction heat of its generation; Cooling element in this temperature regulator passes to air at room temperature or room temperature argon gas or SF
6With AIR MIXTURES, or pass to tap water or other cooling liqss, control the follow-up cooling or the temperature field of semi-solid alloy slurry with this.
4, according to claims 1 described method, it is characterized in that: the temperature of crossing thermalloy liquid is controlled at above 0～250 ℃ of its liquidus temperature in advance.
5, according to claims 1 described method, it is characterized in that: the height of snakelike running channel is 100～1000mm; The diameter of snakelike running channel is 5～100mm; The inside arc bend of snakelike running channel is between 1～10; The material of snakelike running channel is nonmetal or metal; Thermal conductivity liner is hanged down in the inwall brushing of snakelike running channel, and the thickness of this low thermal conductivity liner is 0.2～2mm.
6, according to claims 1 or 5 described methods, it is characterized in that: when pouring into a mould thermalloy liquid, the temperature of snakelike running channel is lower than the solidus temperature of this alloy liquid; This snakelike running channel is carried out preheating, this pre-thermal recovery resistance wire type of heating or electromagnetic induction heating mode or gas heating mode from outside or inner.
7, according to claims 1 or 5 described methods, it is characterized in that: when pouring into a mould thermalloy liquid, the temperature of snakelike running channel is lower than the solidus temperature of this alloy liquid; From outside or inner this snakelike running channel is forced cooling, this forces cooling to adopt recirculated water cooling or air-flow cooling or the cooling of other fluid.
8, method according to claim 1 is characterized in that: feed shielding gas in this snakelike running channel, to avoid or to reduce the oxidation of alloy liquid; This shielding gas is argon gas or nitrogen or helium, or is SF
6With Air mixing gas.
9, method according to claim 1 is characterized in that: the material of the spare-crucible of semi-solid alloy slurry is a non-magnetic metal or nonmetal, and the shape of this spare-crucible is cylindrical vessel or polygon prismatic container.
10, according to claim 1,2,4 or 5 described methods, it is characterized in that: semi-solid alloy is aluminium alloy or hypoeutectic aluminium alloy or the hypereutectic aluminium alloy that composition is lower than maximum solid solution degree; Or magnesium alloy; Perhaps semi-solid alloy is hypereutectic zinc alloy.
11, a kind of rheoforming method of semi-solid alloy slurry, it is characterized in that: will cross thermalloy liquid and pour in the vertical snakelike running channel, this superheated alloy liquid flows downward along the inwall of this snakelike running channel, the alloy melt that flows through this snakelike running channel flows directly into the injection chamber of pressure die-casting machine or extrusion casting machine, injection molding more again; After semi-solid alloy slurry in the casting mold solidified fully when die-casting die or extruding, open form was taken out this die casting or squeeze casting, had just finished rheo-diecasting or extrusion casting process.
12, a kind of rheoforming method of semi-solid alloy slurry, it is characterized in that: will cross thermalloy liquid and pour in the vertical snakelike running channel, this superheated alloy liquid flows downward along the inwall of this snakelike running channel, the alloy melt that flows through this snakelike running channel flows directly in the forging die of swaging machine again, again forging molding; After the semi-solid alloy slurry in the forging die solidified fully, forging was taken out in die sinking, has just finished the rheology forging process one time.
13, a kind of preparation method of semi-solid alloy blank, it is characterized in that: will cross thermalloy liquid and pour in the vertical snakelike running channel, this superheated alloy liquid flows downward along the inwall of snakelike running channel, flow in the spare-crucible again, in spare-crucible, further solidify fully, just obtained the blank of semi-solid alloy, this blank is as the original blank of semi-solid die casting.
14, a kind of preparation method of semi-solid alloy blank, it is characterized in that: will cross thermalloy liquid and pour in the vertical snakelike running channel, this superheated alloy liquid flows downward along the inwall of snakelike running channel, flow directly into continuous cast mold again, cast out the blank of semi-solid alloy continuously, this blank is as the original blank of semi-solid die casting.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102198501B (en) * | 2010-12-06 | 2012-11-21 | 南昌大学 | Thixotropic plastic forming method for metal alloy |
| CN102294442B (en) * | 2011-09-12 | 2013-09-11 | 北京科技大学 | Method for preparing fine crystalline grain wrought aluminum alloy semisolid slurry |
| CN103286280A (en) * | 2013-06-09 | 2013-09-11 | 慈溪市汇丽机电有限公司 | Introducing grain method for preparing semi-solid metal slurry and application thereof |
| CN103691895B (en) * | 2013-12-18 | 2016-05-11 | 北京科技大学 | A kind of vibration serpentine channel preparation method and device of semi-solid-state metal |
| CN104001895A (en) * | 2014-05-21 | 2014-08-27 | 上海交通大学 | Semi-solid rheological squeeze casting forming method of flame retardant magnesium alloy |
| CN105331909B (en) * | 2014-08-07 | 2017-09-12 | 慈溪阿尔特新材料有限公司 | The still heat treatment method of semisolid Al-Si alloy rheo-diecasting part |
| CN105219984B (en) * | 2015-10-22 | 2017-10-17 | 中国科学院广州能源研究所 | The preparation method of solid additive enhancing metal-base composites and the hybrid system for realizing the preparation method |
| CN108588464A (en) * | 2018-05-14 | 2018-09-28 | 中北大学 | A kind of preparation method of carbon nanotube enhanced aluminium-based composite material |
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