CN1411932B - Ring initial crystal semi-solid metal or alloy slurry directly-forming method and device - Google Patents
Ring initial crystal semi-solid metal or alloy slurry directly-forming method and device Download PDFInfo
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Abstract
The direct forming method of spherical primary crystal semi-solid metal or alloy sturry material includes the following steps: pouring low overheated metal whose overtemperature is 5-30 deg.K or alloy solution into a casting mould, i.e. receiving container, at the same time applying a low-power stirring foce to the overheated metal or alloy solution to obtain spheircal primary crystal semi-solid metal or alloy slurry, further cooling said semi-solid metal or alloy slurry and heat-insulating, and cooling to specific temp. or solidus fraction, in the course of cooling or heat-insulation said spherical primary crystal in the metal or alloy semi-solid slurry can obtain further round optimization, then feeding the round optimized spherical primary crystal semi-solid metal or ally sturry into the press-casting machine or forging machine to implement direct forming.
Description
Technical field: the present invention relates to a kind of semi-solid-state metal of ring initial crystal or the direct forming method and the device of alloy pulp.
Background technology: invented since the seventies initial stage Massachusetts Institute Technology (MIT) since the ring initial crystal semi-solid forming technique of metal and alloy, this technology causes the extensive concern and the research of various countries.The ring initial crystal semi-solid forming technique of metal and alloy is general divides two types; One type is that semi-solid-state metal or thixotropic alloy are shaped; Promptly let the metal or alloy semi solid slurry of spherical primary crystal be frozen into blank fully earlier; Again the blank of suitable length is carried out the semisolid remelting heating, the semi-solid blank that will be in solid-liquid two-phase region delivers to die casting machine or forging machine forms; Another kind of is that the metal or alloy semi solid slurry of ring initial crystal is directly delivered to die casting machine or forging machine carries out direct forming, i.e. rheological molding.Because the semi-solid-state shaping of ring initial crystal metal or alloy has many advantages, as: alleviated and wrapped up in gas and solidification shrinkage in being shaped, increased the compactness and the intensity of blank; Alleviate component segregation, improved the uniformity of blank performance; Alleviate the shaping drag, can make the blank of complex parts; Improve production efficiency, reduced percent defective; Reduced and filled the type temperature, prolonged die life; That can also realize producing is increasingly automated, so the semi-solid state forming technique of ring initial crystal metal has been applied in the middle of the manufacturing of many parts.
According to document Flemings M.Behavior of Metal alloys in the Semisolid State.Metall Trans; 1991; 22A (5): 957-981 report; In the thixotropic forming technology of ring initial crystal semi-solid metal or alloy, at first should prepare the blank of ring initial crystal semi-solid metal or alloy.The commercial method of preparation ring initial crystal semi-solid metal or alloy blank has electromagnetic stirring method and strain to activate (strain induced melt activation) method at present.Prepare in ring initial crystal semi-solid metal or the alloy blank method in electromagnetic agitation, all at 50 ° more than the K, requirement must be carried out strong electromagnetic agitation to the degree of superheat of common metal or alloy liquid, and the shear rate that promptly electromagnetic agitation produced is generally at 500～1500S
-1(referring to No. the 4434837th, United States Patent (USP)).Under such shear rate, the rotary speed that is stirred metal or alloy liquid is very high, generally all surpasses 500rp rev/min, at this moment could obtain tiny and semi-solid-state metal or alloy blank ring initial crystal.If shear rate is less than 500S
-1, mostly the form variation of primary crystal is the rosiness primary crystal, and the dendrite layer on continuous casting material surface is thicker, the thixotropy of this blank is bad, is inappropriate for semi-solid die casting.In order to carry out strong electromagnetic agitation, electromagnetic stirring equipment is huge, and investment is high, and electromagnetic agitation power is big, efficient is low, power consumption is big, so the cost of ring initial crystal semi-solid metal or alloy continuous casting material is higher.After ring initial crystal semi-solid metal or the alloy blank preparation; This blank is carried out quantitative sawing, again these a certain size solid-state blank is carried out the heating of electromagnetic induction semisolid remelting, when reaching predetermined fraction solid; The blank of semisolid remelting heating just can carry out thixotropic forming; So this process has increased the energy resource consumption of a semisolid remelting, and in electromagnetic induction semisolid remelting heating process, generally can run off 5～12% metal or alloy of blank; The surface oxidation of blank is also very serious, and these have all increased ring initial crystal semi-solid metal or the cost of thixotropic alloy shaping and the inside or the blemish of drip molding; Material handle after the shaping or useless part must return blank and prepare in workshop or the blank supplier hand, and this has also increased cost.From the above mentioned, the technological process of ring initial crystal semi-solid metal or thixotropic alloy shaping is long, production cost is high.
Though ring initial crystal semi-solid metal or alloy pulp direct forming are that the technological process of rheological molding is short; The energy consumption that does not also need the semisolid remelting heating; But up to the present; The method of required ring initial crystal semi-solid metal of preparation rheological molding or alloy pulp all is that strong mechanical agitation is (referring to No. the 3948650th, 3954455, United States Patent (USP) and Flemings M; Riek R G and Young K P.Rheocasting.Materials Science and Engineering, 1976,25:103-117); The mechanical agitation method utilizes rotating vane or the stirring rod nascent solid phase dendrite in will solidifying to smash, and obtains the metal or alloy semi solid slurry of ring initial crystal.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 chamber and stirring rod is not long, pollutes ring initial crystal semi-solid metal or alloy pulp easily, and ring initial crystal semi-solid metal or alloy pulp also are easy to oxidation; The internal soundness of ring initial crystal semi-solid metal or alloy pulp is low; And the production efficiency of ring initial crystal semi-solid metal or alloy pulp is very low, also can't satisfy the needs of rheological molding, so the direct forming of ring initial crystal semi-solid metal or alloy pulp also can't get into commodity production.
Chinese patent 00109540.4 (in open) has proposed a kind of new method for preparing ring initial crystal semi-solid metal or alloy pulp; Being about to low excessive metal or alloy liquid directly pours in mold or the continuous cast mold; Simultaneously this over-heat metal or alloy liquid being carried out weak the stirring is that low-power stirs; Just can prepare ring initial crystal semi-solid metal or alloy pulp; And this ring initial crystal semi-solid metal or alloy pulp are pure, can not receive the pollution of preparation facilities, so this preparation method's equipment investment is low, ring initial crystal semi-solid metal or alloy pulp preparation cost are low.But the spherical semi-solid-state metal that this preparation method prepares or the fraction solid of alloy pulp is wayward, the form of nascent solid phase rounding not too; Therefore the direct forming of complex parts blank is carried out in this slurry chamber of penetrating that should not be delivered to die casting machine or forging machine again, only is fit to make the continuous casting blank and be used for semi-solid die casting or the making simple foundry goods identical with the mold shape subsequently.If the rounding optimization to the ring initial crystal semi-solid metal or the alloy pulp of this method preparation carries out follow-up ring initial crystal is controlled with fraction solid, just can the chamber of penetrating that the ring initial crystal semi-solid metal after this optimization or alloy pulp are delivered to die casting machine or forging machine be carried out the direct forming of complex parts blank.
Summary of the invention: the invention provides a kind of semi-solid-state metal of ring initial crystal or the method and the device of alloy pulp direct forming; Over-heat metal or alloy liquid are poured in the bearing container; Simultaneously this over-heat metal or the alloy liquid that pours in the bearing container is applied the stirring of weak in short-term travelling-wave electromagnetic field; And this process of setting cooled off the control and the rounding optimization of ring initial crystal; Obtain the semi-solid-state metal or the alloy pulp of the ring initial crystal of predetermined fraction solid, the semi-solid metal slurry of the ring initial crystal of this fraction solid delivered to the chamber of penetrating of die casting machine or forging machine, can direct forming unusual complicated parts blank; The technological process of the semi-solid-state metal of this ring initial crystal or alloy pulp direct forming method is short, and production cost is low.This over-heat metal or alloy liquid to pouring in the bearing container also can apply weak in short-term spiral electromagnetic field stirring; And this process of setting cooled off the control and the rounding optimization of ring initial crystal; Also can obtain the semi-solid-state metal or the alloy pulp of the ring initial crystal of predetermined fraction solid, the semi-solid metal slurry of the ring initial crystal of this fraction solid is delivered to the chamber of penetrating of die casting machine or forging machine, also can direct forming unusual complicated parts blank; This technological process is also short, and production cost is also low.
Technology of the present invention is constructed as follows:
1, produces an overheated metal or alloy liquid, the temperature of this over-heat metal or alloy liquid is controlled at it more than actual liquidus temperature in advance, and this over-heat metal or alloy liquid are directly poured in the bearing container.The shape of this bearing container can be cylindrical or other shapes; The material of this bearing container can be nonmetal or not have the magnetic metal that this bearing container inwall is provided with low thermal conductivity liner, also can not establish low thermal conductivity liner; As being provided with low thermal conductivity liner, the thickness of this low thermal conductivity liner is 0.2～10mm.
2, provide a weak travelling-wave electromagnetic field or spiral electromagnetic field to realize stirring simultaneously; Semi-solid-state metal or the alloy pulp that pours into over-heat metal or the alloy liquid in this bearing container or solidified a small amount of nascent solid phase applied the short time to be stirred; Obtain the semi-solid-state metal or the alloy pulp of ring initial crystal, mixing time is 20S.In this stirring or afterwards; Control the cooling of the semi-solid-state metal or the alloy pulp of this ring initial crystal; Make the further roundingization of this ring initial crystal and this semi-solid-state metal of control or alloy pulp reach predetermined fraction solid or temperature; Should predetermined fraction solid be 0.4～0.6, or this predetermined temperature be higher than the solidus temperature of this metal or alloy or be not less than semi-solid-state metal or the forming temperature of alloy pulp of the ring initial crystal of this fraction solid; This specific cooling velocity is 5 ° of K/min, and be 300 seconds this cool time.Or after this stirs; To the semi-solid-state metal of this ring initial crystal or alloy pulp is incubated and this ring initial crystal rounding optimization; The temperature of this insulation is higher than the solidus temperature of this metal or alloy or is not less than semi-solid-state metal or the forming temperature of alloy pulp of the ring initial crystal of this fraction solid, and this temperature retention time was 300 seconds.
3, to stir power output be that 1500 watts, the supply frequency of electromagnetic agitation are 50～1000 hertz in this weak travelling-wave electromagnetic field.
4, in the cooling of the semi-solid-state metal of ring initial crystal or alloy pulp, this cooler can be kept by resistance heat or combustion of natural gas heat or gas-fired heat or oil inflame heat or main-frequency electromagnetic induction heat or intermediate frequency electromagnetic induction heat or high-frequency electromagnetic induction heat.
5, in the insulation of the semi-solid-state metal of ring initial crystal or alloy pulp, this warmer is kept specific temperature by resistance heat or combustion of natural gas heat or gas-fired heat or oil inflame heat or main-frequency electromagnetic induction heat or intermediate frequency electromagnetic induction heat or high-frequency electromagnetic induction heat.
6, in cooling or insulating process, control preceding semi-solid-state metal of last shaping or the inside and outside temperature difference of alloy pulp to be not more than ± 5 ℃.
7, semi-solid-state metal or the chamber of penetrating that alloy pulp is delivered to die casting machine or forging machine that will pass through the ring initial crystal of rounding optimization form, and obtain die casting or forging.
Travelling-wave electromagnetic agitator and the cooler or the warmer that 8, also can replace straight line to move by the electromagnetic inductor of a hollow pure copper tube dish curl; The bearing container that is about to over-heat metal or alloy liquid is placed in this travelling-wave electromagnetic inductor in advance; Over-heat metal or alloy liquid are directly poured in this bearing container; The straight line that utilizes this travelling-wave electromagnetic inductor to produce moves the travelling-wave electromagnetic field, and this over-heat metal in this bearing container or alloy liquid are carried out that weak in short-term travelling-wave electromagnetic stirs is that low-power stirs, and produces the semi-solid metal slurry of ring initial crystal.
9, this method is adapted to semi-solid-state metal or the direct forming of alloy pulp of the ring initial crystal of acieral, magnesium base alloy, acid bronze alloy, zinc-containing alloy, nickel-base alloy, cobalt-base alloys and ferrous alloy.
The equipment of realizing above-mentioned technology is constructed as follows: the over-heat metal of a low overheat or alloy liquid generator (1) are connected an over-heat metal or alloy liquid bearing container (3); This over-heat metal or alloy liquid bearing container (3) combine with delegation's ripple or spiral magnetic stirrer (4); Through after the electromagnetic agitation; This bearing container (3) combines with a cooler or warmer (6) again; The semi-solid-state metal or the alloy pulp (5) of the ring initial crystal of this bearing container (3) and this predetermined fraction solid are connected with a die casting machine (10) or forging machine (14); Die casting machine (10) combines with die casting (9), and forging machine (14) combines with forging mold (12), and this device constitutes referring to Fig. 1, Fig. 2; Or the over-heat metal of a low overheat or the over-heat metal in the alloy liquid generator (1) or alloy liquid (2) poured into bearing container (3); This bearing container (3) combines with a cooler or warmer (6); This cooler or warmer (6) are that the electromagnetic induction heater by hollow pure copper tube dish curl constitutes; Both can realize that lower powered travelling-wave electromagnetic stirred; Can realize the control cooling and the optimization of ring initial crystal rounding of the semi-solid-state metal or the alloy pulp (5) of this ring initial crystal again, the semi-solid-state metal or the alloy pulp (5) of the ring initial crystal of this bearing container (3) and this predetermined fraction solid are connected with a die casting machine (10) or forging machine (14), and die casting machine (10) combines with die casting (9); Forging machine (14) combines with forging mold (12), and this device constitutes referring to Fig. 3.
The invention reside in and to control accurate low overheat metal or alloy liquid and pour in the bearing container; Row ripple or the stirring of spiral electromagnetic field are that low-power stirs a little less than simultaneously the metal or alloy liquid in this bearing container being carried out; Significantly reduce the energy consumption and the complexity that reduces equipment of simple electromagnetic agitation; Can obtain ring initial crystal semi-solid metal or alloy pulp equally, and the temperature field uniformity of semi-solid-state metal or alloy pulp is more even than the temperature field that weak rotating electromagnetic stirs the metal paste for preparing; These ring initial crystal semi-solid metals or alloy pulp are through further cooling or insulation; The form of ring initial crystal obtains further rounding optimization; Semi-solid-state shaping is carried out in the chamber of penetrating that the ring initial crystal semi-solid metal or the alloy pulp of this rounding optimization are directly delivered to die casting machine or forging machine; Shortened the technological process of the semi-solid-state metal or the alloy blank thixotropic forming of ring initial crystal greatly, equipment investment reduces significantly, reduces the cost of semi-solid-state shaping spare; The present invention has also avoided the semi-solid-state metal of conventional ring initial crystal or the energy consumption of the electromagnetic induction heating in the alloy blank thixotropic forming; Metal loss phenomenon in the time of conventional semi-solid-state metal or the remelting of thixotropic alloy shaping blank heating also can not occurring; Also greatly reduce the surface oxidation of blank, further improve the inherent quality of drip molding; The semi-solid-state metal of preparation ring initial crystal of the present invention or alloy pulp technology are the preparations of a crucible one crucible; The semi-solid-state metal of ring initial crystal or the conveying of alloy pulp are 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 the liquid phase fraction of conventional semi-solid-state metal or thixotropic alloy shaping blank can not be controlled too high; Meet difficulty when being shaped very the complex parts blank, otherwise the carrying of blank is difficult to realize technological operation; Technology of the present invention makes the semi-solid-state metal of ring initial crystal or running gate system, the waste product after the alloy pulp direct forming will be directly in this workshop reuse; Reduce cost of material; And the running gate system behind the semi-solid-state metal of conventional ring initial crystal or the alloy blank thixotropic forming, waste product must turn back to the factory that blank prepares workshop or blank supplier, have increased the shaping production cost.The difficult problem that the present invention had both solved that metal or alloy liquid temp in the liquidus curve casting is difficult to control, the mobile difference of metal or alloy liquid and pouring technology are difficult to realize; Solve simple electromagnetic agitation or mechanical agitation again and prepared the problem that equipment is huge He power of agitator is big, stirring efficiency is low, energy consumption is big in semi-solid-state metal or the alloy pulp of ring initial crystal, can not cause splashing and accident of the semi-solid-state metal that is stirred over-heat metal or alloy liquid or ring initial crystal or alloy pulp again;
Simple in structure for the magnetic stirrer in the device of implementing this method invention, stirring intensity is low, energy consumption is low; This cooler or warmer simple in structure; The tissue morphology of the ring initial crystal of semi-solid-state metal or alloy pulp and fraction solid are easy to control; Be convenient to prepare the semi-solid-state metal or the alloy pulp of the ring initial crystal of a crucible one crucible, this point especially is fit to the shaping needs of machine components blank; This die casting machine or forging machine be general commercial or through appropriate reconstruction with the semi-solid-state metal that adapts to ring initial crystal or alloy pulp the be shaped die casting machine or the forging machine of needs, it is easy to obtain, investment saving; This device both had been suitable for the semi-solid metal slurry direct forming of the ring initial crystal of acieral, also was suitable for the direct forming of semi solid slurry of the ring initial crystal of magnesium base alloy, acid bronze alloy, zinc-containing alloy, nickel-base alloy, cobalt-base alloys and ferrous alloy.
Description of drawings:
Fig. 1 is the semi-solid-state metal of ring initial crystal of the present invention or the technology and the device sketch map of alloy pulp rheo-die-casting.
Fig. 2 is semi-solid-state metal or the direct technology of forging of alloy pulp and the device sketch map of ring initial crystal of the present invention.
Fig. 3 is the semi-solid-state metal of second kind of ring initial crystal of the present invention or the technology and the device sketch map of alloy pulp rheo-die-casting.
Fig. 4 is the tissue of the semisolid A356 alloy pulp of ring initial crystal of the present invention, and light areas is spherical primary-Al, and darker regions is the eutectic liquid that solidifies.
Fig. 5 is the tissue of the semisolid A356 alloy pulp of the ring initial crystal of optimizing through rounding of the present invention, and light areas is spherical primary-Al, and darker regions is the eutectic liquid that solidifies.
Specific embodiment: with reference to Fig. 1,2; This is technological process and the device that provides by above-mentioned technical characterstic; This technology is established the overheated A356 alloy liquid generator 1 of a low overheat, and it is a resistance melting furnace, and the heat-insulating property of this melting furnace is good; Can guarantee the accuracy of temperature control of A356 alloy liquid 2, temperature accuracy is ± 5 ℃; This overheated A356 alloy liquid generator 1 is connected with an overheated A356 alloy liquid bearing container 3, and this bearing container 3 is made by graphite, and this bearing container 3 is in room temperature before the cast; This overheated A356 alloy liquid bearing container 3 combines with delegation's ripple magnetic stirrer (4); The A356 alloy liquid 2 of overheated 10 ° of K is directly poured in this overheated A356 alloy liquid bearing container 3; Simultaneously this overheated A356 alloy liquid 2 in this overheated A356 alloy liquid bearing container 3 being carried out weak in short-term travelling-wave electromagnetic field stirs; Being somebody's turn to do the power that stirs weak travelling-wave electromagnetic field is that 1500W, supply frequency are that 50Hz, mixing time are 20S, and organizing of the semisolid A356 alloy pulp of the ring initial crystal that obtains is as shown in Figure 4; After the stirring; The semisolid A356 alloy pulp of this bearing container 3 together with wherein ring initial crystal moved in the electromagnetic induction heater; This bearing container 3 is further cooled off together with the semisolid A356 alloy pulp of wherein ring initial crystal; Cooling velocity is 5 ° of K/min, and the fraction solid of the semisolid A356 alloy of this ring initial crystal is controlled at predetermined scope, promptly 0.4～0.6; In this cooling or insulating process, the ring initial crystal of this semisolid A356 alloy pulp obtains further rounding optimization, and is as shown in Figure 5; At last the semisolid A356 alloy pulp of this ring initial crystal after the rounding optimization 5 and this bearing container 3 are delivered to die casting machine 10 together, the semisolid A356 alloy pulp 5 of this ring initial crystal is sent in the die casting 9 formed.
Technological process Fig. 3 referring to technical characterstic of the present invention; Utilization replaces travelling-wave electromagnetic agitator 4 and cooler 6 or replacement travelling-wave electromagnetic agitator 4 and warmer 6 by the electromagnetic inductor of hollow pure copper tube dish curl; Overheated A356 alloy liquid bearing container 3 is directly put into this electromagnetic inductor; This bearing container 3 is made by graphite, and this bearing container 3 is in room temperature before the cast; Again will this overheated A356 alloy liquid generator 1 accurately low overheat of control be that the A356 alloy liquid 2 of overheated 10 ° of K directly pours in this overheated A356 alloy bearing container 3; Simultaneously this overheated A356 alloy liquid being carried out weak in short-term travelling-wave electromagnetic field stirs; Being somebody's turn to do the power that stirs weak travelling-wave electromagnetic field is that 1500W, supply frequency are that 1000Hz, mixing time are 20S, and tissue and Fig. 4 of the semisolid A356 alloy pulp of the ring initial crystal that obtains are similar; When stir weak travelling-wave electromagnetic field; Adjust the power of this travelling-wave electromagnetic inductor; The cooling of semisolid A356 alloy pulp with the control ring initial crystal; The follow-up cooling velocity that makes the semisolid A356 alloy pulp of ring initial crystal is that 5 ° of K/min or holding temperature are that 585 ℃, temperature retention time are 5min, and the fraction solid of the A356 alloy pulp of this ring initial crystal is controlled at predetermined scope, promptly 0.4～0.6; The semisolid A356 alloy pulp 5 of the ring initial crystal that is optimized, its tissue and Fig. 5 are similar; Before at last the A356 alloy pulp of this ring initial crystal after the rounding optimization 5 and this bearing container 3 being delivered to die casting machine 10 together, the semisolid A356 alloy pulp of this ring initial crystal sent in die casting 9 or the forging mold 12 form.The present invention has realized the semi-solid-state metal or the alloy pulp direct forming of ring initial crystal; Promptly do not allow the semi-solid-state metal or the alloy pulp of ring initial crystal to solidify fully; And its chamber of penetrating that directly is delivered to die casting machine or forging machine is formed; Avoided the operation that to carry out the semisolid remelting heating to this blank in semi-solid-state metal or the alloy blank thixotropic forming of ring initial crystal; Shortened technological process greatly and reduced power consumption, this method is particularly suitable for the direct forming of semi-solid metal slurry of the ring initial crystal of low-melting-point metal or alloy.
Claims (10)
1. the direct forming method of ring initial crystal semi-solid metal or alloy pulp; Produce the over-heat metal or the alloy liquid of a low overheat; The temperature of this over-heat metal or alloy liquid is controlled at it more than actual liquidus temperature in advance; It is in the bearing container that this over-heat metal or alloy liquid are directly poured into a mold, it is characterized in that:
A. immediately to this mold of pour into be over-heat metal or the alloy liquid in the bearing container or the semi-solid-state metal that has solidified a small amount of nascent solid phase or alloy pulp apply that weak in short-term travelling-wave electromagnetic field is stirred or weak spiral electromagnetic field to stir be that low-power stirs; Obtain the semi-solid-state metal or the alloy pulp of ring initial crystal, mixing time is 20S;
B. after this stirs in short-term; Control the follow-up cooldown rate and the cool time of the semi-solid-state metal or the alloy pulp of this ring initial crystal through a cooler; Cooldown rate is 5 ° of K/min; Be 300S cool time, makes the further rounding optimization of this ring initial crystal, and control this semi-solid-state metal or alloy pulp reaches predetermined fraction solid or temperature; Predetermined fraction solid is 0.4～0.6, or predetermined temperature is higher than the solidus temperature of this metal or alloy or is not less than semi-solid-state metal or the forming temperature of alloy pulp of the ring initial crystal of this fraction solid;
Or after this stirs in short-term; Semi-solid-state metal or alloy pulp to ring initial crystal are incubated; The temperature of this insulation is higher than the solidus temperature of this metal or alloy or is not less than semi-solid-state metal or the forming temperature of alloy pulp of the ring initial crystal of this fraction solid; Temperature retention time is 300S, makes the further rounding optimization of ring initial crystal;
C. with being before bearing container is delivered to die casting machine or forging machine with the spherical semi-solid-state metal or the alloy pulp of predetermined fraction solid together with its mold after the rounding optimization; With this mold be spherical semi-solid-state metal or alloy pulp in the bearing container send into die casting machine penetrate the penetrating in the chamber of chamber or forging machine, carry out die casting or forging and molding.
2. like the direct forming method of claims 1 described ring initial crystal semi-solid metal or alloy pulp; It is characterized in that this travelling-wave electromagnetic field is weak stirs is that electromagnetic agitation power output that low-power stirs is that 1500 watts, the supply frequency of electromagnetic agitation are 50～1000 hertz.
3. the direct forming method of the semi-solid-state metal of ring initial crystal according to claim 1 or alloy pulp; It is characterized in that this cooler kept by resistance heat or combustion of natural gas heat or gas-fired heat or oil inflame heat or main-frequency electromagnetic induction heat or intermediate frequency electromagnetic induction heat or high-frequency electromagnetic induction heat; Make the semi-solid-state metal or the alloy pulp of this ring initial crystal have specific cooling velocity, this specific cooling velocity is 5 ° of K/min.
4. the direct forming method of the semi-solid-state metal of ring initial crystal according to claim 1 or alloy pulp; It is characterized in that this warmer keeps specific temperature by resistance heat or combustion of natural gas heat or gas-fired heat or oil inflame heat or main-frequency electromagnetic induction heat or intermediate frequency electromagnetic induction heat or high-frequency electromagnetic induction heat, this specified temp is higher than the balance solidus temperature of this metal or alloy or is not less than the direct forming temperature of this semi-solid-state metal or alloy pulp.
5. the semi-solid-state metal of ring initial crystal according to claim 1 or alloy pulp direct forming method, the fraction solid of the semi-solid metal slurry of the ring initial crystal when it is characterized in that semi-solid-state metal or the alloy pulp direct forming of this ring initial crystal is 0.4～0.6.
6. the direct forming method of the semi-solid-state metal of ring initial crystal according to claim 1 or alloy pulp is characterized in that in cooling or insulating process, controls preceding semi-solid-state metal of last shaping or the inside and outside temperature difference of alloy pulp to be not more than ± 5 ℃.
7. the semi-solid-state metal of a ring initial crystal or alloy pulp direct forming device; The mold that mainly comprises over-heat metal or alloy liquid generator (1), over-heat metal or alloy liquid (2) is bearing container (3), magnetic stirrer (4); It is characterized in that; Mold is that bearing container (3) combines with a cooler or warmer (6) again; This mold is that bearing container (3) and semi-solid-state metal or the alloy pulp (5) that should be scheduled to the ring initial crystal of fraction solid are connected with a die casting machine (10) or forging machine (14), and die casting machine (10) combines with die casting (9), and forging machine (14) combines with forging mold (12).
8. the semi-solid-state metal of ring initial crystal as claimed in claim 7 or alloy pulp direct forming device; It is characterized in that the mold of this over-heat metal or alloy liquid (2) is that the shape of bearing container (3) is cylindrical or other shapes, this mold is that the material of bearing container (3) is nonmetal or does not have the magnetic metal; This mold is that bearing container (3) inwall is provided with low thermal conductivity liner; Or do not establish low thermal conductivity liner, as be provided with low thermal conductivity liner, the thickness of this low thermal conductivity liner is 0.2～10mm.
9. the semi-solid-state metal of ring initial crystal according to claim 7 or alloy pulp direct forming device; It is characterized in that this cooler or warmer (6) are made up of the power frequency of hollow pure copper tube dish curl or intermediate frequency or high-frequency electromagnetic induction device, or constitute by resistance furnace or gas furnace or oil burner.
10. the device of the semi-solid-state metal of ring initial crystal according to claim 7 or alloy pulp direct forming; It is characterized in that this magnetic stirrer (4) is replaced by the power frequency of hollow pure copper tube dish curl or the cooler or the warmer (6) of intermediate frequency or high-frequency induction formula.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100554093B1 (en) * | 2004-02-04 | 2006-02-22 | 주식회사 나노캐스트코리아 | Forming apparatus for rheoforming method |
| CN1308102C (en) * | 2004-02-20 | 2007-04-04 | 北京有色金属研究总院 | Method of preparing semisolid alloy slurry and its equipment |
| WO2015174937A1 (en) * | 2014-05-16 | 2015-11-19 | Gissco Company Limited | Process for preparing molten metals for casting at a low to zero superheat temperature |
| CN107983929A (en) * | 2018-01-05 | 2018-05-04 | 北京科技大学 | A kind of heating furnace cobalt alloy cushion block semi-solid die casting process |
| KR102121979B1 (en) * | 2018-10-24 | 2020-06-12 | 주식회사 퓨쳐캐스트 | A die casting device comprising a movable electromagnetic control coil module |
| CN114939633B (en) * | 2022-04-13 | 2022-11-29 | 北京科技大学 | System and process for preparing and forming non-oxidation high-purity large-volume semi-solid slurry |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293088A (en) * | 2000-09-29 | 2001-05-02 | 清华大学 | Technology for manufacturing circular alloy blank used for semi-solid processing |
| CN2438526Y (en) * | 2000-09-29 | 2001-07-11 | 清华大学 | Continuous casting apparatus of alloy round blank for semi-solid processing |
| CN1311722A (en) * | 1998-07-24 | 2001-09-05 | 吉布斯压铸铝股份有限公司 | Semi-solid casting apparatus and method |
| CN1330990A (en) * | 2000-07-03 | 2002-01-16 | 北京科技大学 | Process and equipment for preparing semi-solid-state metal slurry in spherical primary crystal or raw material for conticasting |
-
2002
- 2002-03-01 CN CN 02104349 patent/CN1411932B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311722A (en) * | 1998-07-24 | 2001-09-05 | 吉布斯压铸铝股份有限公司 | Semi-solid casting apparatus and method |
| CN1330990A (en) * | 2000-07-03 | 2002-01-16 | 北京科技大学 | Process and equipment for preparing semi-solid-state metal slurry in spherical primary crystal or raw material for conticasting |
| CN1293088A (en) * | 2000-09-29 | 2001-05-02 | 清华大学 | Technology for manufacturing circular alloy blank used for semi-solid processing |
| CN2438526Y (en) * | 2000-09-29 | 2001-07-11 | 清华大学 | Continuous casting apparatus of alloy round blank for semi-solid processing |
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| CN1411932A (en) | 2003-04-23 |
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